UNITED STATES

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-02594

MFS SERIES TRUST IV

(Exact name of registrant as specified in charter)

111 Huntington Avenue, Boston, Massachusetts 02199 (Address of principal executive offices) (Zip code)

Christopher R. Bohane

Massachusetts Financial Services Company

111Huntington Avenue Boston, Massachusetts 02199

(Name and address of agents for service)

Registrant's telephone number, including area code: (617) 954-5000

Date of fiscal year end: August 31

Date of reporting period: February 29, 2024

ITEM 1. REPORTS TO STOCKHOLDERS.

Item 1(a):


Semiannual Report
February 29, 2024
MFS®  Blended Research®  Emerging Markets
Equity Fund
BRK-SEM


MFS® Blended Research® Emerging Markets
Equity Fund
CONTENTS

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back cover
    
The report is prepared for the general information of shareholders. It is authorized for distribution to prospective investors only when preceded or accompanied by a current prospectus.
NOT FDIC INSURED  •  MAY LOSE VALUE  •  NO BANK GUARANTEE

Table of Contents

Table of Contents
Portfolio Composition
Portfolio structure
Top ten holdings
Taiwan Semiconductor Manufacturing
Co. Ltd.
8.8%
Samsung Electronics Co. Ltd. 4.7%
Tencent Holdings Ltd. 3.9%
Alibaba Group Holding Ltd. 2.0%
Hon Hai Precision Industry Co. Ltd. 1.8%
KB Financial Group, Inc. 1.8%
Tata Consultancy Services Ltd. 1.8%
Petrobras 1.7%
Kia Corp. 1.5%
Samsung Fire & Marine Insurance Co. Ltd. 1.5%
GICS equity sectors (g)
Information Technology 23.0%
Financials 21.9%
Consumer Discretionary 12.1%
Communication Services 9.5%
Materials 7.6%
Consumer Staples 6.3%
Industrials 5.9%
Energy 4.8%
Health Care 4.5%
Utilities 2.0%
Real Estate 1.5%
Issuer country weightings (x)
China 26.3%
India 15.8%
South Korea 14.4%
Taiwan 14.1%
Brazil 6.5%
Indonesia 4.0%
South Africa 2.4%
Mexico 2.3%
Greece 2.2%
Other Countries 12.0%
Currency exposure weightings (y)
Hong Kong Dollar 19.3%
Indian Rupee 15.2%
South Korean Won 14.4%
Taiwan Dollar 14.1%
Chinese Renminbi 6.7%
Brazilian Real 6.5%
Indonesian Rupiah 4.0%
United States Dollar 3.3%
South African Rand 2.4%
Other Currencies 14.1%
 
1

Table of Contents
Portfolio Composition - continued
(g) The Global Industry Classification Standard (GICS®) was developed by and/or is the exclusive property of MSCI, Inc. and S&P Global Market Intelligence Inc. (“S&P Global Market Intelligence”). GICS is a service mark of MSCI and S&P Global Market Intelligence and has been licensed for use by MFS. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.
(x) Represents the portfolio’s exposure to issuer countries as a percentage of a portfolio’s net assets. For purposes of this presentation, United States (included in Other Countries) includes Cash & Cash Equivalents.
(y) Represents the portfolio’s exposure to a particular currency as a percentage of a portfolio's net assets. For purposes of this presentation, United States Dollar includes Cash & Cash Equivalents.
Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities. Please see the Statement of Assets and Liabilities for additional information related to the fund’s cash position and other assets and liabilities.
Percentages are based on net assets as of February 29, 2024.
The portfolio is actively managed and current holdings may be different.
2

Table of Contents
Expense Table
Fund expenses borne by the shareholders during the period,
September 1, 2023 through February 29, 2024
As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds.
The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period September 1, 2023 through February 29, 2024.
Actual Expenses
The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.
Hypothetical Example for Comparison Purposes
The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.
Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads). Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.
3

Table of Contents
Expense Table - continued
Share
Class
  Annualized
Expense
Ratio
Beginning
Account Value
9/01/23
Ending
Account Value
2/29/24
Expenses
Paid During
Period (p)
9/01/23-2/29/24
A Actual 1.24% $1,000.00 $1,056.63 $6.34
Hypothetical (h) 1.24% $1,000.00 $1,018.70 $6.22
B Actual 1.99% $1,000.00 $1,051.80 $10.15
Hypothetical (h) 1.99% $1,000.00 $1,014.97 $9.97
C Actual 1.99% $1,000.00 $1,052.01 $10.15
Hypothetical (h) 1.99% $1,000.00 $1,014.97 $9.97
I Actual 0.99% $1,000.00 $1,057.49 $5.06
Hypothetical (h) 0.99% $1,000.00 $1,019.94 $4.97
R1 Actual 1.24% $1,000.00 $1,056.69 $6.34
Hypothetical (h) 1.24% $1,000.00 $1,018.70 $6.22
R2 Actual 1.49% $1,000.00 $1,055.39 $7.61
Hypothetical (h) 1.49% $1,000.00 $1,017.45 $7.47
R3 Actual 1.24% $1,000.00 $1,056.91 $6.34
Hypothetical (h) 1.24% $1,000.00 $1,018.70 $6.22
R4 Actual 0.99% $1,000.00 $1,057.88 $5.07
Hypothetical (h) 0.99% $1,000.00 $1,019.94 $4.97
R6 Actual 0.90% $1,000.00 $1,058.07 $4.61
Hypothetical (h) 0.90% $1,000.00 $1,020.39 $4.52
(h) 5% class return per year before expenses.
(p) “Expenses Paid During Period” are equal to each class’s annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period).  Expenses paid do not include any applicable sales charges (loads). If these transaction costs had been included, your costs would have been higher.
Notes to Expense Table
For the period from September 1, 2023 through February 29, 2024, the distribution fee for Class R1 was not imposed. Had the distribution fee been imposed throughout the entire six month period, the annualized expense ratio, the actual expenses paid during the period, and the hypothetical expenses paid during the period would have been approximately 1.99%, $10.18, and $9.97 for Class R1. See Note 3 in the Notes to Financial Statements for additional information.
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Table of Contents
Portfolio of Investments
2/29/24 (unaudited)
The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.
Issuer     Shares/Par Value ($)
Common Stocks – 97.5%
Airlines – 0.7%  
Catrion Catering Holding Co.   3,643 $129,777
Copa Holdings S.A., “A”   3,510 342,120
        $471,897
Alcoholic Beverages – 1.2%  
Ambev S.A.   150,500 $380,859
Kweichow Moutai Co. Ltd., “A”   1,000 235,638
Wuliangye Yibin Co. Ltd., “A”   6,300 124,585
        $741,082
Apparel Manufacturers – 0.1%  
Pou Chen Corp.   78,000 $75,262
Automotive – 5.1%  
BYD Co. Ltd.   22,500 $555,495
Kia Corp.   10,118 945,998
Mahindra & Mahindra Ltd.   38,605 899,707
Maruti Suzuki India Ltd.   3,110 423,400
Yutong Bus Co. Ltd., “A”   164,600 427,218
        $3,251,818
Biotechnology – 0.7%  
Hugel, Inc. (a)   3,330 $459,888
Brokerage & Asset Managers – 0.4%  
B3 S.A. - Brasil Bolsa Balcao   101,000 $260,673
Moscow Exchange MICEX-RTS PJSC (a)(u)   57,902 0
        $260,673
Business Services – 4.4%  
Chinasoft International Ltd.   120,000 $78,166
HCL Technologies Ltd.   25,461 510,916
Infosys Ltd.   27,472 554,600
JOYY, Inc., ADR   6,392 201,348
Tata Consultancy Services Ltd.   23,097 1,140,724
WNS (Holdings) Ltd., ADR (a)   5,614 323,928
        $2,809,682
Chemicals – 0.3%  
UPL Ltd.   37,685 $213,476
5

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Computer Software – 1.0%  
Elm Co.   1,177 $331,730
Kingsoft Corp.   107,200 299,166
        $630,896
Computer Software - Systems – 7.5%  
Asustek Computer, Inc.   19,000 $273,494
Hon Hai Precision Industry Co. Ltd.   355,000 1,156,773
Lenovo Group Ltd.   254,000 281,267
Samsung Electronics Co. Ltd.   53,950 2,973,813
Wistron Corp.   23,000 84,041
        $4,769,388
Construction – 4.3%  
Anhui Conch Cement Co. Ltd.   156,500 $342,203
Beijing New Building Materials PLC, “A”   50,300 196,424
Beijing Roborock Technology Co. Ltd., “A”   2,200 99,634
CEMEX S.A.B. de C.V. (a)   651,625 498,155
Midea Group Co. Ltd., “A”   40,800 355,236
Techtronic Industries Co. Ltd.   15,000 162,367
Ultratech Cement Ltd.   4,827 575,890
Zhejiang Supor Co. Ltd., “A”   63,700 489,533
        $2,719,442
Consumer Products – 0.5%  
AmorePacific Corp.   3,683 $330,795
Consumer Services – 0.1%  
KE Holdings, Inc., ADR   6,760 $91,868
Electrical Equipment – 0.3%  
Voltronic Power Technology Corp.   4,000 $203,104
Electronics – 11.1%  
MediaTek, Inc.   15,000 $540,977
Novatek Microelectronics Corp.   27,000 513,358
Realtek Semiconductor Corp.   11,000 198,010
Taiwan Semiconductor Manufacturing Co. Ltd.   257,000 5,610,022
Tripod Technology Corp.   38,000 250,052
        $7,112,419
Energy - Independent – 0.9%  
Hindustan Petroleum Corp. Ltd.   50,471 $310,071
Reliance Industries Ltd.   6,946 244,746
        $554,817
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Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Energy - Integrated – 4.3%  
LUKOIL PJSC (a)(u)   9,157 $0
MOL Hungarian Oil & Gas PLC   28,240 224,690
Oil & Natural Gas Corp. Ltd.   108,625 346,641
Petrobras   134,800 1,117,752
PetroChina Co. Ltd.   1,058,000 833,752
Sasol Ltd.   26,678 201,309
        $2,724,144
Energy - Renewables – 0.3%  
Mytilineos S.A.   4,818 $187,463
Engineering - Construction – 1.3%  
Budimex S.A.   1,964 $359,049
Doosan Bobcat, Inc.   13,385 471,933
        $830,982
Food & Beverages – 2.7%  
AVI Ltd.   75,717 $353,004
Gruma S.A.B. de C.V.   15,557 277,045
Inner Mongolia Yili Industrial Group Co. Ltd., “A”   163,864 645,820
Orion Corp.   4,575 319,178
PT Indofood Sukses Makmur Tbk   288,400 121,581
        $1,716,628
Food & Drug Stores – 0.6%  
BGF Retail Co., Ltd.   1,414 $140,275
BIM Birlesik Magazalar A.S.   18,048 224,361
        $364,636
Forest & Paper Products – 0.3%  
PT Indah Kiat Pulp & Paper Tbk   395,100 $219,360
Gaming & Lodging – 0.2%  
OPAP S.A.   8,645 $157,625
Insurance – 3.9%  
China Pacific Insurance Co. Ltd.   180,400 $344,233
DB Insurance Co. Ltd.   8,751 649,293
Ping An Insurance Co. of China Ltd., “H”   130,000 582,796
Samsung Fire & Marine Insurance Co. Ltd.   4,152 929,180
        $2,505,502
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Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Internet – 6.1%  
MakeMyTrip Ltd. (a)   5,682 $350,523
NetEase, Inc.   29,700 668,387
NetEase, Inc., ADR   3,749 404,592
Tencent Holdings Ltd.   70,000 2,478,319
        $3,901,821
Major Banks – 2.6%  
Bandhan Bank Ltd.   153,234 $361,480
Bank of China Ltd.   764,000 300,545
National Bank of Greece S.A (a)   47,066 368,495
Nedbank Group Ltd.   52,753 602,864
        $1,633,384
Medical & Health Technology & Services – 0.4%  
OdontoPrev S.A.   112,700 $273,186
Medical Equipment – 0.3%  
Shenzhen Mindray Bio-Medical Electronics Co. Ltd., “A”   4,300 $172,867
Metals & Mining – 4.4%  
African Rainbow Minerals Ltd.   11,527 $101,471
Alrosa PJSC (a)(u)   143,843 0
Aluminum Corp. of China Ltd.   422,000 211,283
Hindalco Industries Ltd.   38,433 233,543
Industries Qatar Q.P.S.C.   175,727 622,598
Jiangxi Copper Co. Ltd., “H”   228,700 340,589
Kumba Iron Ore Ltd.   9,393 262,960
POSCO Holdings, Inc.   477 154,570
Vale S.A.   63,500 855,719
        $2,782,733
Natural Gas - Distribution – 0.5%  
China Resources Gas Group Ltd.   102,600 $310,572
Other Banks & Diversified Financials – 15.0%  
Akbank T.A.S.   65,010 $86,551
Bangkok Bank Public Co. Ltd.   132,000 522,627
Bank Negara Indonesia PT   1,246,500 475,915
Bank of Communications Co. Ltd.   147,000 96,504
BNK Financial Group, Inc.   43,365 244,246
China Construction Bank Corp.   1,050,000 654,448
China Merchants Bank Co. Ltd.   153,000 596,992
Credicorp Ltd.   2,851 487,179
Emirates NBD Bank PJSC   147,539 735,094
Hana Financial Group, Inc.   6,288 267,273
8

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Other Banks & Diversified Financials – continued  
HDFC Bank Ltd.   34,230 $579,360
HDFC Bank Ltd., ADR   1,507 80,624
IndusInd Bank Ltd.   27,157 483,064
KB Financial Group, Inc.   23,945 1,141,865
Kotak Mahindra Bank Ltd.   22,896 466,515
Krung Thai Bank PCL   223,400 100,286
Power Finance Corp. Ltd.   70,278 339,625
PT Bank Central Asia Tbk   612,000 384,569
PT Bank Mandiri Tbk   1,488,200 662,895
Sberbank of Russia PJSC (a)(u)   177,552 0
Shriram Transport Finance Co. Ltd.   20,196 593,972
Tisco Financial Group PCL   124,300 348,310
Yapi Kredi   320,600 237,128
        $9,585,042
Pharmaceuticals – 3.1%  
China Medical System Holdings Ltd.   77,000 $126,473
China Resources Pharmaceutical Group Ltd.   154,000 104,247
Dr. Reddy's Laboratories Ltd.   2,598 201,290
Gedeon Richter PLC   6,816 181,459
Guangzhou Baiyunshan Pharmaceutical Holdings Co. Ltd., “A”   62,200 255,778
Shanghai Pharmaceuticals Holding Co. Ltd., “H”   57,300 92,213
Sinopharm Group Co. Ltd., “H”   94,400 264,650
Sun Pharmaceutical Industries Ltd.   40,396 768,762
        $1,994,872
Railroad & Shipping – 0.5%  
Evergreen Marine Corp. (Taiwan) Ltd.   25,000 $130,894
Rumo S.A.   45,100 206,126
        $337,020
Real Estate – 1.0%  
Aldar Properties PJSC   130,171 $195,986
Emaar Properties PJSC   199,317 440,641
        $636,627
Restaurants – 0.7%  
Jollibee Foods Corp.   39,210 $190,976
Yum China Holdings, Inc.   6,750 289,507
        $480,483
Specialty Chemicals – 0.2%  
Saudi Aramco Base Oil Co.   3,085 $138,197
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Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Specialty Stores – 6.3%  
Alibaba Group Holding Ltd.   134,600 $1,253,252
Alibaba Group Holding Ltd., ADR   975 72,179
Cencosud S.A.   90,783 163,042
JD.com, Inc., “A”   9,678 110,074
Meituan, “B” (a)   44,260 451,108
Multiplan Empreendimentos Imobiliarios S.A.   43,475 230,970
PDD Holdings, Inc., ADR (a)   6,363 792,448
Vipshop Holdings Ltd., ADR (a)   12,942 249,134
Walmart de Mexico S.A.B. de C.V.   171,298 685,926
        $4,008,133
Telecommunications - Wireless – 2.0%  
Etihad Etisalat Co.   20,517 $302,533
Ooredoo Q.P.S.C.   37,715 117,775
PT Telekom Indonesia   2,792,100 710,684
Turkcell Iletisim Hizmetleri A.S.   70,834 151,845
        $1,282,837
Telephone Services – 1.1%  
Hellenic Telecommunications Organization S.A.   47,198 $712,122
Utilities - Electric Power – 1.1%  
CEZ A.S. (Czech Republic)   8,352 $285,345
China Resources Power Holdings Co. Ltd.   150,000 323,776
Power Grid Corp. of India Ltd.   25,472 86,892
        $696,013
Total Common Stocks (Identified Cost, $54,648,948)   $62,348,756
Preferred Stocks – 1.6%
Computer Software - Systems – 0.3%        
Samsung Electronics Co. Ltd.   4,156 $198,499
Metals & Mining – 0.8%        
Gerdau S.A.   119,310 $516,016
Utilities - Electric Power – 0.5%        
Companhia Energetica de Minas Gerais   116,400 $280,282
Total Preferred Stocks (Identified Cost, $987,111)   $994,797
10

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Investment Companies (h) – 1.3%
Money Market Funds – 1.3%  
MFS Institutional Money Market Portfolio, 5.37% (v) (Identified Cost, $813,327)     813,327 $813,327
Other Assets, Less Liabilities – (0.4)%   (240,746)
Net Assets – 100.0% $63,916,134
    
(a) Non-income producing security.      
(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $813,327 and $63,343,553, respectively.      
(u) The security was valued using significant unobservable inputs and is considered level 3 under the fair value hierarchy. For further information about the fund’s level 3 holdings, please see Note 2 in the Notes to Financial Statements.      
(v) Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.      
    
The following abbreviations are used in this report and are defined:
ADR American Depositary Receipt
PCL Public Company Limited
See Notes to Financial Statements
11

Table of Contents
Financial Statements
Statement of Assets and Liabilities
At 2/29/24 (unaudited)
This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund.
Assets  
Investments in unaffiliated issuers, at value (identified cost, $55,636,059) $63,343,553
Investments in affiliated issuers, at value (identified cost, $813,327) 813,327
Foreign currency, at value (identified cost, $14,605) 14,605
Receivables for  
Fund shares sold 6,335
Dividends 120,869
Receivable from investment adviser 33,166
Other assets 314
Total assets $64,332,169
Liabilities  
Payables for  
Fund shares reacquired $11,507
Payable to affiliates  
Administrative services fee 107
Shareholder servicing costs 10,783
Distribution and service fees 83
Payable for independent Trustees' compensation 500
Deferred foreign capital gains tax expense payable 190,016
Payable for custodian fee 100,319
Payable for audit and tax fees 73,006
Accrued expenses and other liabilities 29,714
Total liabilities $416,035
Net assets $63,916,134
Net assets consist of  
Paid-in capital $61,206,990
Total distributable earnings (loss) 2,709,144
Net assets $63,916,134
Shares of beneficial interest outstanding 5,061,071
12

Table of Contents
Statement of Assets and Liabilities (unaudited) – continued
  Net assets Shares
outstanding
Net asset value
per share (a)
Class A $3,982,055 315,423 $12.62
Class B 260,672 20,847 12.50
Class C 170,096 13,571 12.53
Class I 33,743,219 2,675,273 12.61
Class R1 75,902 6,064 12.52
Class R2 77,420 6,146 12.60
Class R3 123,141 9,759 12.62
Class R4 117,498 9,294 12.64
Class R6 25,366,131 2,004,694 12.65
    
(a) Maximum offering price per share was equal to the net asset value per share for all share classes, except for Class A, for which the maximum offering price per share was $13.39 [100 / 94.25 x $12.62]. On sales of $50,000 or more, the maximum offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. Redemption price per share was equal to the net asset value per share for Classes I, R1, R2, R3, R4, and R6.
See Notes to Financial Statements
13

Table of Contents
Financial Statements
Statement of Operations
Six months ended 2/29/24 (unaudited)
This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations.
Net investment income (loss)  
Income  
Dividends $558,020
Dividends from affiliated issuers 21,661
Other 5,242
Foreign taxes withheld (71,723)
Total investment income $513,200
Expenses  
Management fee $202,273
Distribution and service fees 7,452
Shareholder servicing costs 18,835
Administrative services fee 9,093
Independent Trustees' compensation 1,530
Custodian fee 99,109
Shareholder communications 4,957
Audit and tax fees 66,559
Legal fees 126
Registration fees 61,981
Miscellaneous 15,518
Total expenses $487,433
Reduction of expenses by investment adviser (223,283)
Net expenses $264,150
Net investment income (loss) $249,050
Realized and unrealized gain (loss)
Realized gain (loss) (identified cost basis)  
Unaffiliated issuers (includes $44,618 foreign capital gains tax) $(876,692)
Affiliated issuers (189)
Foreign currency (14,814)
Net realized gain (loss) $(891,695)
Change in unrealized appreciation or depreciation  
Unaffiliated issuers (includes $129,929 increase in deferred foreign capital gains tax) $4,180,975
Affiliated issuers (52)
Translation of assets and liabilities in foreign currencies (1,137)
Net unrealized gain (loss) $4,179,786
Net realized and unrealized gain (loss) $3,288,091
Change in net assets from operations $3,537,141
See Notes to Financial Statements
14

Table of Contents
Financial Statements
Statements of Changes in Net Assets
These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions.
  Six months ended Year ended
  2/29/24
(unaudited)
8/31/23
Change in net assets    
From operations    
Net investment income (loss) $249,050 $1,339,722
Net realized gain (loss) (891,695) (2,169,465)
Net unrealized gain (loss) 4,179,786 3,203,116
Change in net assets from operations $3,537,141 $2,373,373
Total distributions to shareholders $(1,650,757) $(1,376,015)
Change in net assets from fund share transactions $13,732,333 $7,306,790
Total change in net assets $15,618,717 $8,304,148
Net assets    
At beginning of period 48,297,417 39,993,269
At end of period $63,916,134 $48,297,417
See Notes to Financial Statements
15

Table of Contents
Financial Statements
Financial Highlights
The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period.
Class A  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.24 $12.11 $15.96 $12.97 $12.12 $13.66
Income (loss) from investment operations
Net investment income (loss) (d) $0.04 $0.32 $0.37 $0.23 $0.24 $0.25
Net realized and unrealized gain (loss) 0.64 0.12 (3.70) 2.96 0.81 (1.20)
 Total from investment operations  $0.68  $0.44  $(3.33)  $3.19  $1.05  $(0.95)
Less distributions declared to shareholders
From net investment income $(0.30) $(0.31) $(0.25) $(0.20) $(0.20) $(0.22)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.30)  $(0.31)  $(0.52)  $(0.20)  $(0.20)  $(0.59)
 Net asset value, end of period (x)  $12.62  $12.24  $12.11  $15.96  $12.97  $12.12
 Total return (%) (r)(s)(t)(x) 5.66(n) 3.79 (21.42) 24.78 8.63 (6.77)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.08(a) 2.44 1.94 1.82 2.39 2.95
Expenses after expense reductions 1.24(a) 1.24 1.24 1.24 1.24 1.24
Net investment income (loss) 0.71(a)(l) 2.69 2.62 1.50 1.98 2.01
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $3,982 $4,331 $4,797 $7,869 $5,702 $5,174
See Notes to Financial Statements
16

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Financial Highlights – continued
Class B  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.09 $11.96 $15.75 $12.81 $11.99 $13.54
Income (loss) from investment operations
Net investment income (loss) (d) $(0.00)(w) $0.23 $0.28 $0.11 $0.15 $0.21
Net realized and unrealized gain (loss) 0.62 0.13 (3.67) 2.93 0.80 (1.25)
 Total from investment operations  $0.62  $0.36  $(3.39)  $3.04  $0.95  $(1.04)
Less distributions declared to shareholders
From net investment income $(0.21) $(0.23) $(0.13) $(0.10) $(0.13) $(0.14)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.21)  $(0.23)  $(0.40)  $(0.10)  $(0.13)  $(0.51)
 Net asset value, end of period (x)  $12.50  $12.09  $11.96  $15.75  $12.81  $11.99
 Total return (%) (r)(s)(t)(x) 5.18(n) 3.07 (21.98) 23.77 7.88 (7.51)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.83(a) 3.18 2.71 2.58 3.19 3.70
Expenses after expense reductions 1.99(a) 1.99 1.99 1.99 1.99 1.99
Net investment income (loss) (0.04)(a)(l) 1.96 2.02 0.72 1.22 1.63
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $261 $256 $276 $403 $312 $391
See Notes to Financial Statements
17

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Financial Highlights – continued
Class C  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.11 $11.95 $15.72 $12.78 $11.95 $13.50
Income (loss) from investment operations
Net investment income (loss) (d) $(0.00)(w) $0.23 $0.26 $0.11 $0.15 $0.16
Net realized and unrealized gain (loss) 0.62 0.13 (3.65) 2.93 0.78 (1.19)
 Total from investment operations  $0.62  $0.36  $(3.39)  $3.04  $0.93  $(1.03)
Less distributions declared to shareholders
From net investment income $(0.20) $(0.20) $(0.11) $(0.10) $(0.10) $(0.15)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.20)  $(0.20)  $(0.38)  $(0.10)  $(0.10)  $(0.52)
 Net asset value, end of period (x)  $12.53  $12.11  $11.95  $15.72  $12.78  $11.95
 Total return (%) (r)(s)(t)(x) 5.20(n) 3.08 (22.02) 23.87 7.78 (7.51)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.84(a) 3.18 2.69 2.58 3.19 3.70
Expenses after expense reductions 1.99(a) 1.99 1.99 1.99 1.99 1.99
Net investment income (loss) (0.03)(a)(l) 1.95 1.85 0.72 1.22 1.31
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $170 $177 $224 $410 $344 $420
See Notes to Financial Statements
18

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Financial Highlights – continued
Class I  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.26 $12.14 $16.00 $13.00 $12.16 $13.71
Income (loss) from investment operations
Net investment income (loss) (d) $0.05 $0.36 $0.39 $0.28 $0.29 $0.29
Net realized and unrealized gain (loss) 0.64 0.12 (3.69) 2.96 0.80 (1.22)
 Total from investment operations  $0.69  $0.48  $(3.30)  $3.24  $1.09  $(0.93)
Less distributions declared to shareholders
From net investment income $(0.34) $(0.36) $(0.29) $(0.24) $(0.25) $(0.25)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.34)  $(0.36)  $(0.56)  $(0.24)  $(0.25)  $(0.62)
 Net asset value, end of period (x)  $12.61  $12.26  $12.14  $16.00  $13.00  $12.16
 Total return (%) (r)(s)(t)(x) 5.75(n) 4.06 (21.21) 25.10 8.89 (6.55)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.80(a) 2.19 1.67 1.57 1.91 2.70
Expenses after expense reductions 0.99(a) 0.99 0.99 0.99 0.99 0.99
Net investment income (loss) 0.87(a)(l) 2.98 2.77 1.83 2.46 2.26
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $33,743 $20,793 $17,811 $33,247 $21,273 $1,811
See Notes to Financial Statements
19

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Financial Highlights – continued
Class R1  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.15 $12.03 $15.84 $12.84 $12.01 $13.57
Income (loss) from investment operations
Net investment income (loss) (d) $0.04 $0.32 $0.39 $0.17 $0.15 $0.17
Net realized and unrealized gain (loss) 0.64 0.12 (3.70) 2.94 0.80 (1.20)
 Total from investment operations  $0.68  $0.44  $(3.31)  $3.11  $0.95  $(1.03)
Less distributions declared to shareholders
From net investment income $(0.31) $(0.32) $(0.23) $(0.11) $(0.12) $(0.16)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.31)  $(0.32)  $(0.50)  $(0.11)  $(0.12)  $(0.53)
 Net asset value, end of period (x)  $12.52  $12.15  $12.03  $15.84  $12.84  $12.01
 Total return (%) (r)(s)(t)(x) 5.67(n) 3.82 (21.43) 24.32 7.84 (7.47)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.08(a) 2.44 1.96 2.18 3.14 3.70
Expenses after expense reductions 1.24(a) 1.24 1.24 1.59 1.99 1.99
Net investment income (loss) 0.70(a)(l) 2.72 2.82 1.11 1.25 1.32
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $76 $72 $69 $88 $71 $66
See Notes to Financial Statements
20

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Financial Highlights – continued
Class R2  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.21 $12.08 $15.93 $12.95 $12.11 $13.66
Income (loss) from investment operations
Net investment income (loss) (d) $0.03 $0.30 $0.36 $0.18 $0.21 $0.23
Net realized and unrealized gain (loss) 0.63 0.12 (3.73) 2.97 0.81 (1.20)
 Total from investment operations  $0.66  $0.42  $(3.37)  $3.15  $1.02  $(0.97)
Less distributions declared to shareholders
From net investment income $(0.27) $(0.29) $(0.21) $(0.17) $(0.18) $(0.21)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.27)  $(0.29)  $(0.48)  $(0.17)  $(0.18)  $(0.58)
 Net asset value, end of period (x)  $12.60  $12.21  $12.08  $15.93  $12.95  $12.11
 Total return (%) (r)(s)(t)(x) 5.54(n) 3.61 (21.67) 24.47 8.35 (6.97)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.33(a) 2.69 2.22 2.08 2.64 3.20
Expenses after expense reductions 1.49(a) 1.49 1.49 1.49 1.49 1.49
Net investment income (loss) 0.46(a)(l) 2.48 2.57 1.21 1.75 1.82
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $77 $73 $71 $90 $73 $67
See Notes to Financial Statements
21

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Financial Highlights – continued
Class R3  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.24 $12.12 $15.98 $12.98 $12.14 $13.69
Income (loss) from investment operations
Net investment income (loss) (d) $0.04 $0.32 $0.41 $0.23 $0.21 $0.24
Net realized and unrealized gain (loss) 0.64 0.13 (3.75) 2.97 0.83 (1.19)
 Total from investment operations  $0.68  $0.45  $(3.34)  $3.20  $1.04  $(0.95)
Less distributions declared to shareholders
From net investment income $(0.30) $(0.33) $(0.25) $(0.20) $(0.20) $(0.23)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.30)  $(0.33)  $(0.52)  $(0.20)  $(0.20)  $(0.60)
 Net asset value, end of period (x)  $12.62  $12.24  $12.12  $15.98  $12.98  $12.14
 Total return (%) (r)(s)(t)(x) 5.69(n) 3.83 (21.45) 24.80 8.52 (6.75)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.08(a) 2.43 1.99 1.82 2.43 2.95
Expenses after expense reductions 1.24(a) 1.24 1.24 1.24 1.24 1.24
Net investment income (loss) 0.70(a)(l) 2.68 2.96 1.50 1.71 1.89
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $123 $119 $118 $107 $81 $71
See Notes to Financial Statements
22

Table of Contents
Financial Highlights – continued
Class R4  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.28 $12.16 $16.03 $13.02 $12.17 $13.72
Income (loss) from investment operations
Net investment income (loss) (d) $0.06 $0.36 $0.43 $0.26 $0.28 $0.30
Net realized and unrealized gain (loss) 0.64 0.12 (3.74) 2.98 0.81 (1.23)
 Total from investment operations  $0.70  $0.48  $(3.31)  $3.24  $1.09  $(0.93)
Less distributions declared to shareholders
From net investment income $(0.34) $(0.36) $(0.29) $(0.23) $(0.24) $(0.25)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.34)  $(0.36)  $(0.56)  $(0.23)  $(0.24)  $(0.62)
 Net asset value, end of period (x)  $12.64  $12.28  $12.16  $16.03  $13.02  $12.17
 Total return (%) (r)(s)(t)(x) 5.79(n) 4.05 (21.24) 25.10 8.90 (6.55)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.83(a) 2.19 1.72 1.58 2.14 2.70
Expenses after expense reductions 0.99(a) 0.99 0.99 0.99 0.99 0.99
Net investment income (loss) 0.96(a)(l) 2.97 3.12 1.70 2.25 2.36
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $117 $113 $104 $118 $97 $85
See Notes to Financial Statements
23

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Financial Highlights – continued
Class R6  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $12.30 $12.17 $16.04 $13.03 $12.19 $13.73
Income (loss) from investment operations
Net investment income (loss) (d) $0.06 $0.37 $0.45 $0.27 $0.29 $0.31
Net realized and unrealized gain (loss) 0.64 0.13 (3.75) 2.98 0.81 (1.22)
 Total from investment operations  $0.70  $0.50  $(3.30)  $3.25  $1.10  $(0.91)
Less distributions declared to shareholders
From net investment income $(0.35) $(0.37) $(0.30) $(0.24) $(0.26) $(0.26)
From net realized gain (0.27) (0.37)
 Total distributions declared to shareholders  $(0.35)  $(0.37)  $(0.57)  $(0.24)  $(0.26)  $(0.63)
 Net asset value, end of period (x)  $12.65  $12.30  $12.17  $16.04  $13.03  $12.19
 Total return (%) (r)(s)(t)(x) 5.81(n) 4.24 (21.18) 25.17 8.91 (6.40)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.74(a) 2.08 1.64 1.51 2.05 2.58
Expenses after expense reductions 0.90(a) 0.88 0.90 0.93 0.92 0.87
Net investment income (loss) 1.04(a)(l) 3.08 3.23 1.79 2.36 2.44
Portfolio turnover 26(n) 63 58 60 63 64
Net assets at end of period (000 omitted) $25,366 $22,363 $16,523 $17,855 $14,422 $12,590
    
(a) Annualized.
(d) Per share data is based on average shares outstanding.
(l) Recognition of net investment income by the fund may be affected by the timing of the declaration of dividends by companies in which the fund invests and the actual annual net investment income ratio may differ.
(n) Not annualized.
(r) Certain expenses have been reduced without which performance would have been lower.
(s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.
(t) Total returns do not include any applicable sales charges.
(w) Per share amount was less than $0.01.
(x) The net asset values and total returns have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted accounting principles required at period end for financial reporting purposes.
See Notes to Financial Statements
24

Table of Contents
Notes to Financial Statements
(unaudited) 
(1) Business and Organization
MFS Blended Research Emerging Markets Equity Fund (the fund) is a diversified series of MFS Series Trust IV (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.
The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.
(2) Significant Accounting Policies
General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions. Investments in emerging markets can involve additional and greater risks than the risks associated with investments in developed foreign markets. Emerging markets can have less developed markets, greater custody and operational risk, less developed legal, regulatory, accounting, and auditing systems, greater government involvement in the economy, greater risk of new or inconsistent government treatment of or restrictions on issuers and instruments, and greater political, social, and economic instability than developed markets.
Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.
Investment Valuations Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the
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Notes to Financial Statements (unaudited) - continued
Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.
Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value.
Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.
Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.
26

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Notes to Financial Statements (unaudited) - continued
Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of February 29, 2024 in valuing the fund's assets and liabilities:
Financial Instruments Level 1 Level 2 Level 3 Total
Equity Securities:        
China $16,804,319 $— $— $16,804,319
India 10,089,749 10,089,749
South Korea 9,226,806 9,226,806
Taiwan 9,035,987 9,035,987
Brazil 4,121,583 4,121,583
Indonesia 2,575,004 2,575,004
South Africa 1,521,608 1,521,608
Mexico 1,461,126 1,461,126
Greece 1,425,705 1,425,705
Other Countries 6,633,070 448,596 0 7,081,666
Mutual Funds 813,327 813,327
Total $63,708,284 $448,596 $0 $64,156,880
For further information regarding security characteristics, see the Portfolio of Investments.
The following is a reconciliation of level 3 assets for which significant unobservable inputs were used to determine fair value. The table presents the activity of level 3 securities held at the beginning and the end of the period.
  Equity
Securities
Balance as of 8/31/23 $0
Realized gain (loss) (268,044)
Change in unrealized appreciation or depreciation 398,197
Sales (130,153)
Balance as of 2/29/24 $0
The net change in unrealized appreciation or depreciation from investments held as level 3 at February 29, 2024 is $0. At February 29, 2024, the fund held four level 3 securities.
Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign
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Notes to Financial Statements (unaudited) - continued
currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.
Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.
Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.
The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.
Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.
Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for a three year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.
Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net
28

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Notes to Financial Statements (unaudited) - continued
asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.
Book/tax differences primarily relate to passive foreign investment companies and wash sale loss deferrals.
The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows:
  Year ended
8/31/23
Ordinary income (including any short-term capital gains) $1,376,015
The federal tax cost and the tax basis components of distributable earnings were as follows:
As of 2/29/24  
Cost of investments $58,470,219
Gross appreciation 9,438,347
Gross depreciation (3,751,686)
Net unrealized appreciation (depreciation) $5,686,661
As of 8/31/23  
Undistributed ordinary income 1,258,969
Capital loss carryforwards (1,751,070)
Other temporary differences (60,944)
Net unrealized appreciation (depreciation) 1,375,805
The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.
As of August 31, 2023, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows:
Short-Term $(1,751,070)
Multiple Classes of Shares of Beneficial Interest — The fund offers multiple classes of shares, which differ in their respective distribution and service fees. The fund's income, realized and unrealized gain (loss), and common expenses are allocated to shareholders based on the daily net assets of each class. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class C shares will convert to
29

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Notes to Financial Statements (unaudited) - continued
Class A shares approximately eight years after purchase. The fund’s distributions declared to shareholders as reported in the Statements of Changes in Net Assets are presented by class as follows:
  Six months
ended
2/29/24
  Year
ended
8/31/23
Class A $94,501   $106,681
Class B 4,264   5,263
Class C 2,774   3,158
Class I 884,602   588,416
Class R1 1,808   1,867
Class R2 1,652   1,716
Class R3 2,831   3,244
Class R4 3,131   3,041
Class R6 655,194   662,629
Total $1,650,757   $1,376,015
(3) Transactions with Affiliates
Investment Adviser — The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates based on the fund's average daily net assets:
Up to $1 billion 0.75%
In excess of $1 billion and up to $2.5 billion 0.70%
In excess of $2.5 billion 0.675%
MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this management fee reduction amounted to $3,477, which is included in the reduction of total expenses in the Statement of Operations. The management fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.74% of the fund's average daily net assets.
The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses, such that total fund operating expenses do not exceed the following rates annually of each class’s average daily net assets:
        Classes        
A B C I R1 R2 R3 R4 R6
1.24% 1.99% 1.99% 0.99% 1.99% 1.49% 1.24% 0.99% 0.95%
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Notes to Financial Statements (unaudited) - continued
This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this reduction amounted to $219,806, which is included in the reduction of total expenses in the Statement of Operations.
Distributor — MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $306 for the six months ended February 29, 2024, as its portion of the initial sales charge on sales of Class A shares of the fund.
The Board of Trustees has adopted a distribution plan for certain share classes pursuant to Rule 12b-1 of the Investment Company Act of 1940.
The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. The distribution and service fees are computed daily and paid monthly.
Distribution Plan Fee Table:
  Distribution
Fee Rate (d)
Service
Fee Rate (d)
Total
Distribution
Plan (d)
Annual
Effective
Rate (e)
Distribution
and Service
Fee
Class A 0.25% 0.25% 0.25% $ 4,945
Class B 0.75% 0.25% 1.00% 1.00% 1,238
Class C 0.75% 0.25% 1.00% 1.00% 852
Class R1 0.75% 0.25% 1.00% 0.25% 90
Class R2 0.25% 0.25% 0.50% 0.50% 182
Class R3 0.25% 0.25% 0.25% 145
Total Distribution and Service Fees         $7,452
(d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees equal to these annual percentage rates of each class’s average daily net assets. The distribution and service fee rates disclosed by class represent the current rates in effect at the end of the reporting period. Any rate changes, if applicable, are detailed below.
(e) The annual effective rates represent actual fees incurred under the distribution plan for the six months ended February 29, 2024 based on each class's average daily net assets. MFD has voluntarily agreed to rebate a portion of each class's 0.25% service fee attributable to accounts for which there is no financial intermediary specified on the account except for accounts attributable to MFS or its affiliates' seed money. There were no service fee rebates for the six months ended February 29, 2024. For the six months ended February 29, 2024, the 0.75% distribution fee was not imposed for Class R1 shares due to the sales charge limitations contained in Financial Industry Regulatory Authority (“FINRA”) Rule 2341.
Certain Class A shares are subject to a contingent deferred sales charge (CDSC) in the event of a shareholder redemption within 18 months of purchase. Class B shares are subject to a CDSC in the event of a shareholder redemption within six years of
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Notes to Financial Statements (unaudited) - continued
purchase. Class C shares are subject to a CDSC in the event of a shareholder redemption within 12 months of purchase.  All contingent deferred sales charges are paid to MFD and during the six months ended February 29, 2024, were as follows:
  Amount
Class A $4
Class B 23
Class C 9
Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 29, 2024, the fee was $2,263, which equated to 0.0084% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. Class R6 shares do not incur sub-accounting fees. For the six months ended February 29, 2024, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $16,572.
Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund.  Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services.  The fund is charged an annual fixed amount of $17,500 plus a fee based on average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.0337% of the fund's average daily net assets.
Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.
Other — The fund invests in the MFS Institutional Money Market Portfolio which is managed by MFS and seeks current income consistent with preservation of capital and liquidity. This money market fund does not pay a management fee to MFS but does incur investment and operating costs.
At February 29, 2024, MFS held approximately 64% and 69% of the outstanding shares of Class R3 and Class R4, respectively, and 100% of the outstanding shares of Class R1 and Class R2.
The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended February 29, 2024, this reimbursement amounted to $5,190, which is included in “Other” income in the Statement of Operations.
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Notes to Financial Statements (unaudited) - continued
(4) Portfolio Securities
For the six months ended February 29, 2024, purchases and sales of investments, other than short-term obligations, aggregated $25,928,164 and $13,897,562, respectively.
(5) Shares of Beneficial Interest
The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows:
  Six months ended
2/29/24
  Year ended
8/31/23
  Shares Amount   Shares Amount
Shares sold          
Class A 218,227 $2,678,509   254,491 $2,936,773
Class B   1 18
Class C 289 3,482   278 3,296
Class I 1,077,637 13,177,194   752,072 8,828,285
Class R3 610 7,431   2,187 26,166
Class R4 242 2,953   967 11,732
Class R6 195,120 2,360,840   856,276 9,864,592
  1,492,125 $18,230,409   1,866,272 $21,670,862
Shares issued to shareholders
in reinvestment of distributions
         
Class A 7,797 $94,501   9,110 $106,681
Class B 355 4,264   453 5,263
Class C 230 2,774   271 3,158
Class I 71,550 865,756   48,565 568,699
Class R1 150 1,808   161 1,867
Class R2 136 1,652   147 1,716
Class R3 234 2,831   277 3,244
Class R4 258 3,131   259 3,041
Class R6 53,970 655,194   56,442 662,629
  134,680 $1,631,911   115,685 $1,356,298
Shares reacquired          
Class A (264,371) $(3,280,793)   (305,998) $(3,486,786)
Class B (703) (8,392)   (2,332) (28,723)
Class C (1,547) (18,561)   (4,704) (53,640)
Class I (169,740) (2,045,490)   (572,358) (6,765,097)
Class R3 (832) (10,110)   (2,475) (30,137)
Class R4 (401) (4,820)   (602) (7,037)
Class R6 (62,243) (761,821)   (451,996) (5,348,950)
  (499,837) $(6,129,987)   (1,340,465) $(15,720,370)
33

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Notes to Financial Statements (unaudited) - continued
  Six months ended
2/29/24
  Year ended
8/31/23
  Shares Amount   Shares Amount
Net change          
Class A (38,347) $(507,783)   (42,397) $(443,332)
Class B (348) (4,128)   (1,878) (23,442)
Class C (1,028) (12,305)   (4,155) (47,186)
Class I 979,447 11,997,460   228,279 2,631,887
Class R1 150 1,808   161 1,867
Class R2 136 1,652   147 1,716
Class R3 12 152   (11) (727)
Class R4 99 1,264   624 7,736
Class R6 186,847 2,254,213   460,722 5,178,271
  1,126,968 $13,732,333   641,492 $7,306,790
The fund is one of several mutual funds in which certain MFS funds may invest. The MFS funds do not invest in the underlying funds for the purpose of exercising management or control.  At the end of the period, the MFS Lifetime 2050 Fund, the MFS Lifetime 2040 Fund, the MFS Lifetime 2045 Fund, the MFS Lifetime 2055 Fund, the MFS Lifetime 2060 Fund, and the MFS Lifetime 2035 Fund were the owners of record of approximately 8%, 7%, 7%, 5%, 3%, and 1%, respectively, of the value of outstanding voting shares of the fund. In addition, the MFS Lifetime 2065 Fund was the owner of record of less than 1% of the value of outstanding voting shares of the fund.
Effective June 1, 2019, purchases of the fund’s Class B shares were closed to new and existing investors subject to certain exceptions. Effective September 29, 2023, purchases of the fund's Class R1 and Class R2 shares were closed to new eligible investors.
(6) Line of Credit
The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate) plus 0.10%, 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 13, 2025 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended February 29, 2024, the fund’s commitment fee and interest expense were $116 and $0, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.
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Notes to Financial Statements (unaudited) - continued
(7) Investments in Affiliated Issuers
An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the following were affiliated issuers:
Affiliated Issuers Beginning
Value
Purchases Sales
Proceeds
Realized
Gain
(Loss)
Change in
Unrealized
Appreciation or
Depreciation
Ending
Value
MFS Institutional Money Market Portfolio  $519,794  $19,480,356  $19,186,582  $(189)  $(52)  $813,327
    
Affiliated Issuers Dividend
Income
Capital Gain
Distributions
MFS Institutional Money Market Portfolio  $21,661  $—
(8) Russia and Ukraine Conflict
The fund invests in securities and/or derivative instruments that are economically tied to Russia and/or Ukraine. Escalation of the conflict between Russia and Ukraine in late February 2022 caused market volatility and disruption in the tradability of Russian securities, including closure of the local securities market, temporary restriction on securities sales by non-residents, and disruptions to clearance and payment systems. To the extent that the fund is unable to sell securities, whether due to market constraints or to the sanctions imposed on Russia by the United States and other countries, those securities are considered illiquid and the value of those securities reflects their illiquid classification. Management continues to monitor these events and to evaluate the related impacts on fund performance.
35

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Proxy Voting Policies and Information
MFS votes proxies on behalf of the fund pursuant to proxy voting policies and procedures that are available without charge, upon request, by calling 1-800-225-2606, by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available by August 31 of each year without charge by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Quarterly Portfolio Disclosure
The fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The fund's Form N-PORT reports are available on the SEC's Web site at  http://www.sec.gov. A shareholder can obtain the portfolio holdings report for the first and third quarters of the fund's fiscal year at mfs.com/openendfunds by choosing the fund's name and then scrolling to the “Resources” section and clicking on the “Prospectus and Reports” tab.
Further Information
From time to time, MFS may post important information about the fund or the MFS Funds on the MFS Web site (mfs.com). This information is available at https://www.mfs.com/announcements or at mfs.com/openendfunds by choosing the fund’s name and then scrolling to the “Resources” section and clicking on the “Announcements” tab, if any.
Information About Fund Contracts and Legal Claims
The fund has entered into contractual arrangements with an investment adviser, administrator, distributor, shareholder servicing agent, and custodian who each provide services to the fund. Unless expressly stated otherwise, shareholders are not parties to, or intended beneficiaries of these contractual arrangements, and these contractual arrangements are not intended to create any shareholder right to enforce them against the service providers or to seek any remedy under them against the service providers, either directly or on behalf of the fund.
Under the Trust’s By-Laws and Declaration of Trust, any claims asserted against or on behalf of the MFS Funds, including claims against Trustees and Officers, must be brought in state and federal courts located within the Commonwealth of Massachusetts.
Provision of Financial Reports and Summary Prospectuses
The fund produces financial reports every six months and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund’s annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund’s records. However, any shareholder may contact MFSC (please see back cover for address and telephone number) to request that copies of these reports and summary prospectuses be sent personally to that shareholder.
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Save paper with eDelivery.
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CONTACT
WEB SITE
mfs.com
MFS TALK
1-800-637-8255
24 hours a day
ACCOUNT SERVICE AND LITERATURE
Shareholders
1-800-225-2606
Financial advisors
1-800-343-2829
Retirement plan services
1-800-637-1255
MAILING ADDRESS
MFS Service Center, Inc.
P.O. Box 219341
Kansas City, MO 64121-9341
OVERNIGHT MAIL
MFS Service Center, Inc.
Suite 219341
430 W 7th Street
Kansas City, MO 64105-1407

Semiannual Report
February 29, 2024
MFS®  Blended Research®     
International Equity Fund
BRX-SEM


MFS® Blended Research®    
International Equity Fund
CONTENTS

1

3

5

13

15

16

17

26

37

37

37

37

37
    

back cover
    
The report is prepared for the general information of shareholders. It is authorized for distribution to prospective investors only when preceded or accompanied by a current prospectus.
NOT FDIC INSURED  •  MAY LOSE VALUE  •  NO BANK GUARANTEE

Table of Contents

Table of Contents
Portfolio Composition
Portfolio structure
Top ten holdings
Taiwan Semiconductor Manufacturing Co. Ltd., ADR 2.4%
ASML Holding N.V. 2.3%
Roche Holding AG 1.7%
KDDI Corp. 1.4%
Volvo Group 1.4%
Sanofi 1.4%
Samsung Electronics Co. Ltd. 1.4%
Schneider Electric SE 1.4%
Eni S.p.A. 1.4%
Manulife Financial Corp. 1.4%
GICS equity sectors (g)
Financials 20.5%
Industrials 14.9%
Information Technology 13.6%
Consumer Discretionary 11.6%
Health Care 8.2%
Materials 8.0%
Consumer Staples 7.4%
Communication Services 5.7%
Energy 5.6%
Utilities 2.3%
Real Estate 1.1%
Equity Warrants (o) 0.0%
Issuer country weightings (x)
Japan 15.1%
France 10.1%
United Kingdom 9.6%
Canada 8.3%
China 7.5%
South Korea 4.7%
Netherlands 4.7%
Switzerland 4.1%
Australia 4.1%
Other Countries 31.8%
Currency exposure weightings (y)
Euro 24.1%
Japanese Yen 15.1%
British Pound Sterling 9.6%
Canadian Dollar 8.3%
Hong Kong Dollar 7.3%
South Korean Won 4.7%
United States Dollar 4.3%
Swiss Franc 4.1%
Taiwan Dollar 3.9%
Other Currencies 18.6%
 
1

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Portfolio Composition - continued
(g) The Global Industry Classification Standard (GICS®) was developed by and/or is the exclusive property of MSCI, Inc. and S&P Global Market Intelligence Inc. (“S&P Global Market Intelligence”). GICS is a service mark of MSCI and S&P Global Market Intelligence and has been licensed for use by MFS. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.
(o) Less than 0.1%.
(x) Represents the portfolio’s exposure to issuer countries as a percentage of a portfolio’s net assets. For purposes of this presentation, United States (included in Other Countries) includes Cash & Cash Equivalents and Other.
(y) Represents the portfolio’s exposure to a particular currency as a percentage of a portfolio's net assets. For purposes of this presentation, United States Dollar includes Cash & Cash Equivalents.
Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities. Please see the Statement of Assets and Liabilities for additional information related to the fund’s cash position and other assets and liabilities.
Other includes equivalent exposure from currency derivatives and/or any offsets to derivative positions and may be negative.
Percentages are based on net assets as of February 29, 2024.
The portfolio is actively managed and current holdings may be different.
2

Table of Contents
Expense Table
Fund expenses borne by the shareholders during the period,
September 1, 2023 through February 29, 2024
As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds.
The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period September 1, 2023 through February 29, 2024.
Actual Expenses
The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.
Hypothetical Example for Comparison Purposes
The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.
Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads). Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.
3

Table of Contents
Expense Table - continued
Share
Class
  Annualized
Expense
Ratio
Beginning
Account Value
9/01/23
Ending
Account Value
2/29/24
Expenses
Paid During
Period (p)
9/01/23-2/29/24
A Actual 0.89% $1,000.00 $1,071.29 $4.58
Hypothetical (h) 0.89% $1,000.00 $1,020.44 $4.47
B Actual 1.64% $1,000.00 $1,067.00 $8.43
Hypothetical (h) 1.64% $1,000.00 $1,016.71 $8.22
C Actual 1.64% $1,000.00 $1,067.48 $8.43
Hypothetical (h) 1.64% $1,000.00 $1,016.71 $8.22
I Actual 0.64% $1,000.00 $1,072.19 $3.30
Hypothetical (h) 0.64% $1,000.00 $1,021.68 $3.22
R1 Actual 1.64% $1,000.00 $1,067.53 $8.43
Hypothetical (h) 1.64% $1,000.00 $1,016.71 $8.22
R2 Actual 1.14% $1,000.00 $1,069.94 $5.87
Hypothetical (h) 1.14% $1,000.00 $1,019.19 $5.72
R3 Actual 0.89% $1,000.00 $1,071.21 $4.58
Hypothetical (h) 0.89% $1,000.00 $1,020.44 $4.47
R4 Actual 0.64% $1,000.00 $1,072.95 $3.30
Hypothetical (h) 0.64% $1,000.00 $1,021.68 $3.22
R6 Actual 0.56% $1,000.00 $1,073.72 $2.89
Hypothetical (h) 0.56% $1,000.00 $1,022.08 $2.82
(h) 5% class return per year before expenses.
(p) “Expenses Paid During Period” are equal to each class’s annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period).  Expenses paid do not include any applicable sales charges (loads). If these transaction costs had been included, your costs would have been higher.
4

Table of Contents
Portfolio of Investments
2/29/24 (unaudited)
The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.
Issuer     Shares/Par Value ($)
Common Stocks – 98.6%
Aerospace & Defense – 1.1%  
Rolls-Royce Holdings PLC (a)   988,937 $4,607,603
Thales S.A.   21,082 3,122,741
        $7,730,344
Airlines – 0.6%  
Air Canada (a)(l)   302,784 $4,042,623
Alcoholic Beverages – 1.0%  
Ambev S.A.   966,100 $2,444,839
Kirin Holdings Co. Ltd.   327,700 4,556,367
        $7,001,206
Apparel Manufacturers – 0.9%  
Adidas AG   20,099 $4,064,806
Compagnie Financiere Richemont S.A.   14,797 2,352,528
        $6,417,334
Automotive – 2.9%  
BYD Co. Ltd.   96,000 $2,370,113
Compagnie Generale des Etablissements Michelin   213,900 7,904,147
Kia Corp.   22,612 2,114,144
Mahindra & Mahindra Ltd.   141,850 3,305,877
Stellantis N.V.   147,638 3,851,152
        $19,545,433
Brokerage & Asset Managers – 2.1%  
3i Group PLC   47,570 $1,481,974
Brookfield Corp.   163,139 6,731,595
iA Financial Corp., Inc.   38,387 2,380,466
IG Group Holdings PLC   427,582 3,772,759
        $14,366,794
Business Services – 2.0%  
CGI, Inc. (a)   34,793 $3,994,728
Eurofins Scientific SE   27,720 1,654,977
Serco Group PLC   1,337,178 3,161,473
Tata Consultancy Services Ltd.   100,532 4,965,113
        $13,776,291
Chemicals – 0.6%  
Nutrien Ltd.   73,214 $3,821,596
5

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Computer Software – 1.2%  
Check Point Software Technologies Ltd. (a)   40,077 $6,429,152
Kingsoft Corp.   509,200 1,421,039
        $7,850,191
Computer Software - Systems – 5.7%  
Amadeus IT Group S.A.   37,108 $2,180,981
Constellation Software, Inc.   3,121 8,689,058
Hitachi Ltd.   78,300 6,614,658
Hon Hai Precision Industry Co. Ltd.   2,322,000 7,566,269
NEC Corp.   65,100 4,381,397
Samsung Electronics Co. Ltd.   172,531 9,510,195
        $38,942,558
Construction – 2.8%  
Anhui Conch Cement Co. Ltd.   589,000 $1,287,909
CEMEX S.A.B. de C.V. (a)   2,582,414 1,974,206
Compagnie de Saint-Gobain S.A.   112,672 8,670,440
Heidelberg Materials AG   42,737 4,143,254
James Hardie Industries PLC, GDR (a)   34,153 1,348,616
Midea Group Co. Ltd., “A”   176,200 1,534,133
        $18,958,558
Consumer Products – 0.6%  
AmorePacific Corp.   23,572 $2,117,160
Kao Corp.   45,800 1,740,107
        $3,857,267
Containers – 0.8%  
Brambles Ltd.   551,445 $5,401,678
Electrical Equipment – 3.2%  
Legrand S.A.   36,178 $3,655,959
Mitsubishi Electric Corp.   520,200 8,263,449
Schneider Electric SE   41,645 9,443,076
        $21,362,484
Electronics – 6.8%  
ASML Holding N.V.   16,636 $15,651,747
Novatek Microelectronics Corp.   143,000 2,718,898
NXP Semiconductors N.V.   11,735 2,930,582
Renesas Electronics Corp.   311,800 5,104,810
Taiwan Semiconductor Manufacturing Co. Ltd., ADR   126,959 16,335,814
Tokyo Electron Ltd.   14,600 3,590,595
        $46,332,446
6

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Energy - Integrated – 5.6%  
Cenovus Energy, Inc. (l)   113,895 $1,984,760
Eni S.p.A.   602,402 9,276,528
Harbour Energy PLC   523,939 1,669,293
LUKOIL PJSC (a)(u)   35,153 0
PetroChina Co. Ltd.   7,570,000 5,965,502
Petroleo Brasileiro S.A., ADR   383,001 6,327,176
Suncor Energy, Inc. (l)   122,967 4,224,994
TotalEnergies SE   136,321 8,691,331
        $38,139,584
Engineering - Construction – 0.4%  
Doosan Bobcat, Inc.   81,884 $2,887,094
Food & Beverages – 1.8%  
AVI Ltd.   417,818 $1,947,929
Ezaki Glico Co. Ltd.   123,100 3,668,695
Gruma S.A.B. de C.V.   167,256 2,978,554
Nestle S.A.   20,720 2,149,904
WH Group Ltd.   2,241,500 1,351,284
        $12,096,366
Food & Drug Stores – 2.3%  
Loblaw Cos. Ltd.   32,824 $3,498,260
Sugi Holdings Co. Ltd. (l)   200,900 3,148,443
Tesco PLC   2,509,756 8,832,562
        $15,479,265
Gaming & Lodging – 1.6%  
Aristocrat Leisure Ltd.   153,935 $4,665,691
Whitbread PLC   151,481 6,315,812
        $10,981,503
General Merchandise – 1.2%  
B&M European Value Retail S.A.   699,778 $4,644,546
Dollarama, Inc.   43,076 3,332,070
        $7,976,616
Insurance – 4.5%  
AUB Group Ltd.   75,040 $1,474,010
China Pacific Insurance Co. Ltd.   1,753,400 3,345,782
DB Insurance Co. Ltd.   50,708 3,762,354
Manulife Financial Corp.   390,792 9,274,885
Ping An Insurance Co. of China Ltd., “H”   882,500 3,956,287
Samsung Fire & Marine Insurance Co. Ltd.   24,652 5,516,894
7

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Insurance – continued  
Tokio Marine Holding, Inc.   109,900 $3,207,860
        $30,538,072
Internet – 2.8%  
Moneysupermarket.com Group PLC   564,741 $1,745,111
NetEase, Inc., ADR   72,366 7,809,739
Scout24 AG   29,910 2,172,355
Tencent Holdings Ltd.   212,600 7,527,010
        $19,254,215
Leisure & Toys – 1.0%  
Sankyo Co. Ltd. (l)   593,000 $6,763,807
Machinery & Tools – 2.6%  
Finning International, Inc.   116,139 $3,044,782
GEA Group AG   52,717 2,123,514
OSG Corp.   209,600 2,935,267
Volvo Group   353,945 9,734,307
        $17,837,870
Major Banks – 9.4%  
ABN AMRO Group N.V., GDR   437,682 $7,024,740
Bank of China Ltd.   4,421,000 1,739,151
Bank of Ireland Group PLC   278,021 2,420,106
BNP Paribas   130,025 7,782,604
Danske Bank A.S.   202,154 5,935,791
DBS Group Holdings Ltd.   361,300 8,949,596
Erste Group Bank AG   89,397 3,565,287
National Australia Bank Ltd.   187,493 4,124,095
National Bank of Greece S.A (a)   376,096 2,944,573
Nedbank Group Ltd.   221,748 2,534,147
OTP Bank PLC   33,258 1,594,565
UBS Group AG   276,913 7,893,907
UniCredit S.p.A.   206,604 6,902,126
        $63,410,688
Medical & Health Technology & Services – 0.3%  
OdontoPrev S.A.   731,200 $1,772,437
Medical Equipment – 1.1%  
Demant A.S. (a)   75,223 $3,764,150
Fisher & Paykel Healthcare Corp. Ltd.   151,576 2,261,032
Olympus Corp.   95,000 1,350,987
        $7,376,169
8

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Metals & Mining – 4.3%  
Fortescue Ltd.   209,881 $3,537,438
Glencore PLC   1,394,319 6,602,821
Rio Tinto PLC   119,320 7,649,867
Toyota Tsusho Corp.   83,700 5,400,972
Vale S.A.   426,400 5,746,120
        $28,937,218
Other Banks & Diversified Financials – 4.5%  
Banca Monte dei Paschi di Siena S.p.A.   388,260 $1,586,206
Bangkok Bank Public Co. Ltd.   733,900 2,905,724
China Construction Bank Corp.   8,614,000 5,368,966
Credicorp Ltd.   29,488 5,038,910
Emirates NBD Bank PJSC   372,873 1,857,792
Hana Financial Group, Inc.   36,295 1,542,728
IndusInd Bank Ltd.   47,170 839,052
Julius Baer Group Ltd.   44,496 2,378,889
KB Financial Group, Inc.   88,842 4,236,608
Macquarie Group Ltd.   36,903 4,672,896
Sberbank of Russia PJSC (a)(u)   715,224 0
        $30,427,771
Pharmaceuticals – 6.6%  
Chugai Pharmaceutical Co. Ltd.   141,000 $5,643,010
Dr. Reddy's Laboratories Ltd.   22,835 1,769,228
Novo Nordisk A.S., “B”   31,778 3,777,050
Roche Holding AG   44,405 11,646,678
Sandoz Group AG (a)   49,240 1,528,954
Sanofi   100,724 9,567,921
Santen Pharmaceutical Co. Ltd.   511,300 5,069,687
Sun Pharmaceutical Industries Ltd.   314,290 5,981,142
        $44,983,670
Printing & Publishing – 1.5%  
Transcontinental, Inc., “A”   131,290 $1,387,244
Wolters Kluwer N.V.   57,115 9,003,301
        $10,390,545
Railroad & Shipping – 0.5%  
Sankyu, Inc.   94,000 $3,317,463
Real Estate – 1.2%  
CapitaLand India Trusts IEU, REIT   1,963,164 $1,473,595
Goodman Group, REIT   140,178 2,724,359
KDX Realty Investment Corp., REIT   1,765 1,764,764
9

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Real Estate – continued  
Nomura Real Estate Holdings   98,600 $2,448,558
        $8,411,276
Restaurants – 1.5%  
Pluxee N.V. (a)   69,326 $1,980,708
Sodexo   73,586 5,861,487
Wetherspoons (J.D.) PLC (a)   206,027 1,971,314
        $9,813,509
Specialty Chemicals – 2.1%  
Linde PLC   17,285 $7,757,854
Nitto Denko Corp.   74,000 6,786,953
        $14,544,807
Specialty Stores – 2.6%  
Alibaba Group Holding Ltd.   618,500 $5,758,816
NEXT PLC   61,367 6,440,318
PDD Holdings, Inc., ADR (a)   23,719 2,953,964
Walmart de Mexico S.A.B. de C.V.   662,710 2,653,679
        $17,806,777
Telecommunications - Wireless – 2.2%  
KDDI Corp.   321,700 $9,772,024
PT Telekom Indonesia   19,810,600 5,042,469
        $14,814,493
Telephone Services – 0.5%  
Hellenic Telecommunications Organization S.A.   205,520 $3,100,878
Tobacco – 1.4%  
British American Tobacco PLC   197,544 $5,847,485
Japan Tobacco, Inc.   132,800 3,447,556
        $9,295,041
Trucking – 0.5%  
Yamato Holdings Co. Ltd.   239,500 $3,634,355
Utilities - Electric Power – 2.3%  
CLP Holdings Ltd.   205,500 $1,712,609
E.ON SE   518,189 6,614,290
Iberdrola S.A.   624,994 7,173,738
        $15,500,637
Total Common Stocks (Identified Cost, $575,591,848)   $668,898,929
10

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Preferred Stocks – 0.3%
Metals & Mining – 0.3%        
Gerdau S.A. (Identified Cost, $2,150,388)   499,630 $2,160,899
    
  Strike
Price
First
Exercise
   
Warrants – 0.0%        
Computer Software - Systems – 0.0%
Constellation Software, Inc. (CAD 100 principal amount of Series 2 Debentures for 1 warrant, Expiration 3/31/40) (a)
(Identified Cost, $0)
CAD 11.5 N/A 3,156 $0
    
         
Investment Companies (h) – 0.3%
Money Market Funds – 0.3%  
MFS Institutional Money Market Portfolio, 5.37% (v) (Identified Cost, $1,906,937)     1,906,939 $1,906,939
Collateral for Securities Loaned – 0.2%
State Street Navigator Securities Lending Government Money Market Portfolio, 5.34% (j) (Identified Cost, $1,258,635)     1,258,635 $1,258,635
Other Assets, Less Liabilities – 0.6%   3,921,668
Net Assets – 100.0% $678,147,070
    
(a) Non-income producing security.      
(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $1,906,939 and $672,318,463, respectively.      
(j) The rate quoted is the annualized seven-day yield of the fund at period end.      
(l) A portion of this security is on loan. See Note 2 for additional information.      
(u) The security was valued using significant unobservable inputs and is considered level 3 under the fair value hierarchy. For further information about the fund’s level 3 holdings, please see Note 2 in the Notes to Financial Statements.      
(v) Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.      
11

Table of Contents
Portfolio of Investments (unaudited) – continued
The following abbreviations are used in this report and are defined:
ADR American Depositary Receipt
GDR Global Depositary Receipt
IEU International Equity Unit
REIT Real Estate Investment Trust
Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise indicated. A list of abbreviations is shown below:
CAD Canadian Dollar
See Notes to Financial Statements
12

Table of Contents
Financial Statements
Statement of Assets and Liabilities
At 2/29/24 (unaudited)
This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund.
Assets  
Investments in unaffiliated issuers, at value, including $12,182,673 of securities on loan (identified cost, $579,000,871) $672,318,463
Investments in affiliated issuers, at value (identified cost, $1,906,937) 1,906,939
Foreign currency, at value (identified cost, $3) 3
Receivables for  
Investments sold 44,742,376
Fund shares sold 685,546
Interest and dividends 1,781,868
Other assets 2,099
Total assets $721,437,294
Liabilities  
Payables for  
Investments purchased $40,619,253
Fund shares reacquired 631,602
Collateral for securities loaned, at value (c) 1,258,635
Payable to affiliates  
Investment adviser 1,318
Administrative services fee 587
Shareholder servicing costs 90,316
Distribution and service fees 559
Payable for independent Trustees' compensation 1,893
Deferred foreign capital gains tax expense payable 490,414
Accrued expenses and other liabilities 195,647
Total liabilities $43,290,224
Net assets $678,147,070
Net assets consist of  
Paid-in capital $603,611,627
Total distributable earnings (loss) 74,535,443
Net assets $678,147,070
Shares of beneficial interest outstanding 55,047,563
    
(c) Non-cash collateral is not included.
13

Table of Contents
Statement of Assets and Liabilities (unaudited) – continued
  Net assets Shares
outstanding
Net asset value
per share (a)
Class A $26,830,819 2,152,119 $12.47
Class B 146,691 12,043 12.18
Class C 490,034 40,479 12.11
Class I 268,468,842 21,823,323 12.30
Class R1 1,038,610 86,563 12.00
Class R2 2,883,438 236,512 12.19
Class R3 1,489,440 120,947 12.31
Class R4 704,984 57,249 12.31
Class R6 376,094,212 30,518,328 12.32
    
(a) Maximum offering price per share was equal to the net asset value per share for all share classes, except for Class A, for which the maximum offering price per share was $13.23 [100 / 94.25 x $12.47]. On sales of $50,000 or more, the maximum offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. Redemption price per share was equal to the net asset value per share for Classes I, R1, R2, R3, R4, and R6.
See Notes to Financial Statements
14

Table of Contents
Financial Statements
Statement of Operations
Six months ended 2/29/24 (unaudited)
This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations.
Net investment income (loss)  
Income  
Dividends $6,751,428
Dividends from affiliated issuers 151,200
Other 22,596
Income on securities loaned 17,767
Interest 1,184
Foreign taxes withheld (647,920)
Total investment income $6,296,255
Expenses  
Management fee $1,587,625
Distribution and service fees 49,714
Shareholder servicing costs 129,543
Administrative services fee 50,248
Independent Trustees' compensation 6,113
Custodian fee 96,075
Shareholder communications 9,462
Audit and tax fees 46,248
Legal fees 1,550
Miscellaneous 89,624
Total expenses $2,066,202
Reduction of expenses by investment adviser (124,418)
Net expenses $1,941,784
Net investment income (loss) $4,354,471
Realized and unrealized gain (loss)
Realized gain (loss) (identified cost basis)  
Unaffiliated issuers $7,460,114
Affiliated issuers 1,430
Foreign currency (33,704)
Net realized gain (loss) $7,427,840
Change in unrealized appreciation or depreciation  
Unaffiliated issuers (includes $344,513 increase in deferred foreign capital gains tax) $35,146,650
Affiliated issuers (642)
Translation of assets and liabilities in foreign currencies (31,358)
Net unrealized gain (loss) $35,114,650
Net realized and unrealized gain (loss) $42,542,490
Change in net assets from operations $46,896,961
See Notes to Financial Statements
15

Table of Contents
Financial Statements
Statements of Changes in Net Assets
These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions.
  Six months ended Year ended
  2/29/24
(unaudited)
8/31/23
Change in net assets    
From operations    
Net investment income (loss) $4,354,471 $17,681,456
Net realized gain (loss) 7,427,840 (21,379,703)
Net unrealized gain (loss) 35,114,650 78,394,046
Change in net assets from operations $46,896,961 $74,695,799
Total distributions to shareholders $(18,501,562) $(14,738,424)
Change in net assets from fund share transactions $29,812,857 $70,429,407
Total change in net assets $58,208,256 $130,386,782
Net assets    
At beginning of period 619,938,814 489,552,032
At end of period $678,147,070 $619,938,814
See Notes to Financial Statements
16

Table of Contents
Financial Statements
Financial Highlights
The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period.
Class A  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.94 $10.77 $13.71 $10.79 $10.37 $11.71
Income (loss) from investment operations
Net investment income (loss) (d) $0.07 $0.33 $0.31 $0.31 $0.25 $0.30
Net realized and unrealized gain (loss) 0.77 1.12 (2.57) 2.87 0.47 (1.01)
 Total from investment operations  $0.84  $1.45  $(2.26)  $3.18  $0.72  $(0.71)
Less distributions declared to shareholders
From net investment income $(0.31) $(0.19) $(0.11) $(0.26) $(0.30) $(0.26)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.31)  $(0.28)  $(0.68)  $(0.26)  $(0.30)  $(0.63)
 Net asset value, end of period (x)  $12.47  $11.94  $10.77  $13.71  $10.79  $10.37
 Total return (%) (r)(s)(t)(x) 7.13(n) 13.60 (17.24) 29.82 6.85 (5.67)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 0.93(a) 0.96 0.95 0.98 0.99 1.00
Expenses after expense reductions 0.89(a) 0.89 0.89 0.89 0.89 0.89
Net investment income (loss) 1.12(a)(l) 2.90 2.44 2.45 2.39 2.80
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $26,831 $27,916 $18,999 $110,106 $93,455 $84,917
See Notes to Financial Statements
17

Table of Contents
Financial Highlights – continued
Class B  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.62 $10.49 $13.61 $10.72 $10.32 $11.64
Income (loss) from investment operations
Net investment income (loss) (d) $0.02 $0.23 $0.23 $0.22 $0.17 $0.24
Net realized and unrealized gain (loss) 0.75 1.10 (2.55) 2.85 0.47 (1.02)
 Total from investment operations  $0.77  $1.33  $(2.32)  $3.07  $0.64  $(0.78)
Less distributions declared to shareholders
From net investment income $(0.21) $(0.11) $(0.23) $(0.18) $(0.24) $(0.17)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.21)  $(0.20)  $(0.80)  $(0.18)  $(0.24)  $(0.54)
 Net asset value, end of period (x)  $12.18  $11.62  $10.49  $13.61  $10.72  $10.32
 Total return (%) (r)(s)(t)(x) 6.70(n) 12.81 (17.99) 28.84 6.06 (6.41)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.68(a) 1.71 1.70 1.72 1.74 1.75
Expenses after expense reductions 1.64(a) 1.64 1.64 1.64 1.64 1.64
Net investment income (loss) 0.37(a)(l) 2.05 1.85 1.75 1.61 2.28
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $147 $154 $161 $210 $148 $152
See Notes to Financial Statements
18

Table of Contents
Financial Highlights – continued
Class C  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.58 $10.48 $13.59 $10.70 $10.28 $11.59
Income (loss) from investment operations
Net investment income (loss) (d) $0.02 $0.23 $0.23 $0.23 $0.17 $0.22
Net realized and unrealized gain (loss) 0.75 1.09 (2.53) 2.83 0.47 (1.00)
 Total from investment operations  $0.77  $1.32  $(2.30)  $3.06  $0.64  $(0.78)
Less distributions declared to shareholders
From net investment income $(0.24) $(0.13) $(0.24) $(0.17) $(0.22) $(0.16)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.24)  $(0.22)  $(0.81)  $(0.17)  $(0.22)  $(0.53)
 Net asset value, end of period (x)  $12.11  $11.58  $10.48  $13.59  $10.70  $10.28
 Total return (%) (r)(s)(t)(x) 6.75(n) 12.72 (17.91) 28.78 6.08 (6.42)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.68(a) 1.71 1.70 1.72 1.74 1.75
Expenses after expense reductions 1.64(a) 1.64 1.64 1.64 1.64 1.64
Net investment income (loss) 0.33(a)(l) 2.10 1.90 1.82 1.64 2.04
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $490 $418 $330 $382 $220 $240
See Notes to Financial Statements
19

Table of Contents
Financial Highlights – continued
Class I  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.80 $10.63 $13.78 $10.84 $10.42 $11.77
Income (loss) from investment operations
Net investment income (loss) (d) $0.08 $0.36 $0.37 $0.38 $0.31 $0.31
Net realized and unrealized gain (loss) 0.76 1.10 (2.59) 2.84 0.44 (1.00)
 Total from investment operations  $0.84  $1.46  $(2.22)  $3.22  $0.75  $(0.69)
Less distributions declared to shareholders
From net investment income $(0.34) $(0.20) $(0.36) $(0.28) $(0.33) $(0.29)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.34)  $(0.29)  $(0.93)  $(0.28)  $(0.33)  $(0.66)
 Net asset value, end of period (x)  $12.30  $11.80  $10.63  $13.78  $10.84  $10.42
 Total return (%) (r)(s)(t)(x) 7.22(n) 13.92 (17.13) 30.14 7.09 (5.45)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 0.68(a) 0.71 0.70 0.72 0.75 0.75
Expenses after expense reductions 0.64(a) 0.64 0.64 0.64 0.64 0.64
Net investment income (loss) 1.34(a)(l) 3.14 3.09 2.91 3.06 2.89
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $268,469 $251,004 $176,391 $22,325 $5,183 $1,652
See Notes to Financial Statements
20

Table of Contents
Financial Highlights – continued
Class R1  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.48 $10.44 $13.51 $10.65 $10.24 $11.63
Income (loss) from investment operations
Net investment income (loss) (d) $0.02 $0.23 $0.23 $0.22 $0.17 $0.22
Net realized and unrealized gain (loss) 0.75 1.08 (2.53) 2.82 0.47 (1.01)
 Total from investment operations  $0.77  $1.31  $(2.30)  $3.04  $0.64  $(0.79)
Less distributions declared to shareholders
From net investment income $(0.25) $(0.18) $(0.20) $(0.18) $(0.23) $(0.23)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.25)  $(0.27)  $(0.77)  $(0.18)  $(0.23)  $(0.60)
 Net asset value, end of period (x)  $12.00  $11.48  $10.44  $13.51  $10.65  $10.24
 Total return (%) (r)(s)(t)(x) 6.75(n) 12.68 (17.95) 28.83 6.13 (6.44)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.68(a) 1.71 1.70 1.72 1.74 1.75
Expenses after expense reductions 1.64(a) 1.64 1.64 1.64 1.64 1.64
Net investment income (loss) 0.34(a)(l) 2.08 1.95 1.74 1.63 2.09
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $1,039 $879 $314 $233 $166 $146
See Notes to Financial Statements
21

Table of Contents
Financial Highlights – continued
Class R2  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.68 $10.55 $13.72 $10.80 $10.38 $11.73
Income (loss) from investment operations
Net investment income (loss) (d) $0.05 $0.31 $0.31 $0.29 $0.22 $0.27
Net realized and unrealized gain (loss) 0.76 1.08 (2.57) 2.86 0.47 (1.01)
 Total from investment operations  $0.81  $1.39  $(2.26)  $3.15  $0.69  $(0.74)
Less distributions declared to shareholders
From net investment income $(0.30) $(0.17) $(0.34) $(0.23) $(0.27) $(0.24)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.30)  $(0.26)  $(0.91)  $(0.23)  $(0.27)  $(0.61)
 Net asset value, end of period (x)  $12.19  $11.68  $10.55  $13.72  $10.80  $10.38
 Total return (%) (r)(s)(t)(x) 6.99(n) 13.31 (17.55) 29.50 6.56 (5.95)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.18(a) 1.21 1.20 1.22 1.24 1.25
Expenses after expense reductions 1.14(a) 1.14 1.14 1.14 1.14 1.14
Net investment income (loss) 0.86(a)(l) 2.76 2.61 2.30 2.12 2.54
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $2,883 $2,744 $1,261 $404 $156 $164
See Notes to Financial Statements
22

Table of Contents
Financial Highlights – continued
Class R3  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.81 $10.65 $13.82 $10.88 $10.45 $11.80
Income (loss) from investment operations
Net investment income (loss) (d) $0.06 $0.35 $0.32 $0.29 $0.25 $0.30
Net realized and unrealized gain (loss) 0.76 1.09 (2.58) 2.91 0.49 (1.02)
 Total from investment operations  $0.82  $1.44  $(2.26)  $3.20  $0.74  $(0.72)
Less distributions declared to shareholders
From net investment income $(0.32) $(0.19) $(0.34) $(0.26) $(0.31) $(0.26)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.32)  $(0.28)  $(0.91)  $(0.26)  $(0.31)  $(0.63)
 Net asset value, end of period (x)  $12.31  $11.81  $10.65  $13.82  $10.88  $10.45
 Total return (%) (r)(s)(t)(x) 7.03(n) 13.67 (17.37) 29.75 6.92 (5.72)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 0.93(a) 0.96 0.95 0.96 0.99 1.00
Expenses after expense reductions 0.89(a) 0.89 0.89 0.89 0.89 0.89
Net investment income (loss) 1.07(a)(l) 3.08 2.64 2.22 2.37 2.79
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $1,489 $1,228 $532 $395 $64 $58
See Notes to Financial Statements
23

Table of Contents
Financial Highlights – continued
Class R4  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.81 $10.65 $13.79 $10.85 $10.42 $11.77
Income (loss) from investment operations
Net investment income (loss) (d) $0.08 $0.35 $0.38 $0.35 $0.27 $0.33
Net realized and unrealized gain (loss) 0.76 1.11 (2.59) 2.87 0.49 (1.02)
 Total from investment operations  $0.84  $1.46  $(2.21)  $3.22  $0.76  $(0.69)
Less distributions declared to shareholders
From net investment income $(0.34) $(0.21) $(0.36) $(0.28) $(0.33) $(0.29)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.34)  $(0.30)  $(0.93)  $(0.28)  $(0.33)  $(0.66)
 Net asset value, end of period (x)  $12.31  $11.81  $10.65  $13.79  $10.85  $10.42
 Total return (%) (r)(s)(t)(x) 7.21(n) 13.83 (17.09) 30.12 7.18 (5.45)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 0.68(a) 0.71 0.69 0.72 0.74 0.75
Expenses after expense reductions 0.64(a) 0.64 0.64 0.64 0.64 0.64
Net investment income (loss) 1.33(a)(l) 3.08 3.11 2.73 2.62 3.04
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $705 $391 $329 $81 $62 $58
See Notes to Financial Statements
24

Table of Contents
Financial Highlights – continued
Class R6  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $11.82 $10.65 $13.80 $10.85 $10.43 $11.78
Income (loss) from investment operations
Net investment income (loss) (d) $0.08 $0.35 $0.37 $0.36 $0.29 $0.34
Net realized and unrealized gain (loss) 0.77 1.12 (2.58) 2.88 0.47 (1.02)
 Total from investment operations  $0.85  $1.47  $(2.21)  $3.24  $0.76  $(0.68)
Less distributions declared to shareholders
From net investment income $(0.35) $(0.21) $(0.37) $(0.29) $(0.34) $(0.30)
From net realized gain (0.09) (0.57) (0.37)
 Total distributions declared to shareholders  $(0.35)  $(0.30)  $(0.94)  $(0.29)  $(0.34)  $(0.67)
 Net asset value, end of period (x)  $12.32  $11.82  $10.65  $13.80  $10.85  $10.43
 Total return (%) (r)(s)(t)(x) 7.29(n) 13.94 (17.07) 30.32 7.18 (5.33)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 0.60(a) 0.62 0.62 0.63 0.65 0.65
Expenses after expense reductions 0.56(a) 0.56 0.55 0.55 0.55 0.54
Net investment income (loss) 1.42(a)(l) 3.13 3.02 2.82 2.76 3.13
Portfolio turnover 26(n) 56 52 68 72 58
Net assets at end of period (000 omitted) $376,094 $335,205 $291,234 $293,695 $247,726 $206,790
    
(a) Annualized.
(d) Per share data is based on average shares outstanding.
(l) Recognition of net investment income by the fund may be affected by the timing of the declaration of dividends by companies in which the fund invests and the actual annual net investment income ratio may differ.
(n) Not annualized.
(r) Certain expenses have been reduced without which performance would have been lower.
(s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.
(t) Total returns do not include any applicable sales charges.
(x) The net asset values and total returns have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted accounting principles required at period end for financial reporting purposes.
See Notes to Financial Statements
25

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Notes to Financial Statements
(unaudited) 
(1) Business and Organization
MFS Blended Research International Equity Fund (the fund) is a diversified series of MFS Series Trust IV (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.
The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.
(2) Significant Accounting Policies
General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions. Investments in emerging markets can involve additional and greater risks than the risks associated with investments in developed foreign markets. Emerging markets can have less developed markets, greater custody and operational risk, less developed legal, regulatory, accounting, and auditing systems, greater government involvement in the economy, greater risk of new or inconsistent government treatment of or restrictions on issuers and instruments, and greater political, social, and economic instability than developed markets.
Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.
Investment Valuations Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the
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Notes to Financial Statements (unaudited) - continued
Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.
Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value.
Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.
Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.
27

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Notes to Financial Statements (unaudited) - continued
Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of February 29, 2024 in valuing the fund's assets and liabilities:
Financial Instruments Level 1 Level 2 Level 3 Total
Equity Securities:        
Japan $102,611,784 $— $— $102,611,784
France 68,335,391 68,335,391
United Kingdom 64,742,938 64,742,938
Canada 56,407,061 0 56,407,061
China 51,038,411 51,038,411
South Korea 31,687,177 31,687,177
Netherlands 31,679,788 31,679,788
Switzerland 27,950,860 27,950,860
Australia 27,948,783 27,948,783
Other Countries 208,657,635 0 208,657,635
Mutual Funds 3,165,574 3,165,574
Total $674,225,402 $0 $0 $674,225,402
For further information regarding security characteristics, see the Portfolio of Investments.  At February 29, 2024, the fund held two level 3 securities valued at $0, which were also held and valued at $0 at August 31, 2023.
Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.
Security Loans — Under its Securities Lending Agency Agreement with the fund, State Street Bank and Trust Company, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund.  Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within three business days.  The loans are collateralized by
28

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Notes to Financial Statements (unaudited) - continued
cash and/or U.S. Treasury and federal agency obligations in an amount typically at least equal to the market value of the securities loaned.  On loans collateralized by cash, the cash collateral is invested in a money market fund.  The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day.  The lending agent provides the fund with indemnification against Borrower default.  In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or, when such purchase is commercially impracticable, pay the fund the market value of the loaned securities.  In return, the lending agent assumes the fund's rights to the related collateral.  If the collateral value is less than the cost to purchase identical securities, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. At period end, the fund had investment securities on loan, all of which were classified as equity securities in the fund's Portfolio of Investments, with a fair value of $12,182,673. The fair value of the fund's investment securities on loan and a related liability of $1,258,635 for cash collateral received on securities loaned are both presented gross in the Statement of Assets and Liabilities. Additionally, these loans were collateralized by U.S. Treasury Obligations of $11,453,954 held by the custodian. The collateral on securities loaned exceeded the value of securities on loan at period end. The liability for cash collateral for securities loaned is carried at fair value, which is categorized as level 2 within the fair value hierarchy. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent.  On loans collateralized by U.S. Treasury and/or federal agency obligations, a fee is received from the Borrower, and is allocated between the fund and the lending agent.  Income from securities lending is separately reported in the Statement of Operations.  The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income.
Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.
Investment Transactions and Income —  Interest income is recorded on the accrual basis. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date.
The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.
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Notes to Financial Statements (unaudited) - continued
Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.
Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for a three year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.
Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.
Book/tax differences primarily relate to wash sale loss deferrals.
The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows:
  Year ended
8/31/23
Ordinary income (including any short-term capital gains) $10,343,305
Long-term capital gains 4,395,119
Total distributions $14,738,424
The federal tax cost and the tax basis components of distributable earnings were as follows:
As of 2/29/24  
Cost of investments $589,495,361
Gross appreciation 108,488,760
Gross depreciation (23,758,719)
Net unrealized appreciation (depreciation) $84,730,041
As of 8/31/23  
Undistributed ordinary income 18,216,006
Capital loss carryforwards (21,077,266)
Other temporary differences (238,217)
Net unrealized appreciation (depreciation) 49,239,521
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Notes to Financial Statements (unaudited) - continued
The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.
As of August 31, 2023, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows:
Short-Term $(9,915,198)
Long-Term (11,162,068)
Total $(21,077,266)
Multiple Classes of Shares of Beneficial Interest — The fund offers multiple classes of shares, which differ in their respective distribution and service fees. The fund's income, realized and unrealized gain (loss), and common expenses are allocated to shareholders based on the daily net assets of each class. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class C shares will convert to Class A shares approximately eight years after purchase. The fund’s distributions declared to shareholders as reported in the Statements of Changes in Net Assets are presented by class as follows:
  Six months
ended
2/29/24
  Year
ended
8/31/23
Class A $688,321   $546,445
Class B 2,535   2,838
Class C 9,656   7,387
Class I 7,494,228   5,503,685
Class R1 20,382   17,970
Class R2 69,777   33,852
Class R3 34,451   15,862
Class R4 11,319   9,228
Class R6 10,170,893   8,601,157
Total $18,501,562   $14,738,424
(3) Transactions with Affiliates
Investment Adviser — The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates based on the fund's average daily net assets:
Up to $1 billion 0.50%
In excess of $1 billion and up to $2.5 billion 0.475%
In excess of $2.5 billion 0.45%
MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this management fee reduction amounted to $40,918,
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Notes to Financial Statements (unaudited) - continued
which is included in the reduction of total expenses in the Statement of Operations.
The management fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.49% of the fund's average daily net assets.
The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses, such that total fund operating expenses do not exceed the following rates annually of each class’s average daily net assets:
Classes
A B C I R1 R2 R3 R4 R6
0.89% 1.64% 1.64% 0.64% 1.64% 1.14% 0.89% 0.64% 0.58%
This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this reduction amounted to $83,500, which is included in the reduction of total expenses in the Statement of Operations.
Distributor — MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $787 for the six months ended February 29, 2024, as its portion of the initial sales charge on sales of Class A shares of the fund.
The Board of Trustees has adopted a distribution plan for certain share classes pursuant to Rule 12b-1 of the Investment Company Act of 1940.
The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. The distribution and service fees are computed daily and paid monthly.
Distribution Plan Fee Table:
  Distribution
Fee Rate (d)
Service
Fee Rate (d)
Total
Distribution
Plan (d)
Annual
Effective
Rate (e)
Distribution
and Service
Fee
Class A 0.25% 0.25% 0.25% $ 33,558
Class B 0.75% 0.25% 1.00% 1.00% 721
Class C 0.75% 0.25% 1.00% 1.00% 2,230
Class R1 0.75% 0.25% 1.00% 1.00% 4,623
Class R2 0.25% 0.25% 0.50% 0.50% 6,964
Class R3 0.25% 0.25% 0.25% 1,618
Total Distribution and Service Fees         $49,714
(d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees equal to these annual percentage rates of each class’s average daily net assets. The distribution and service fee rates disclosed by class represent the current rates in effect at the end of the reporting period. Any rate changes, if applicable, are detailed below.
(e) The annual effective rates represent actual fees incurred under the distribution plan for the six months ended February 29, 2024 based on each class's average daily net assets. MFD has
32

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Notes to Financial Statements (unaudited) - continued
voluntarily agreed to rebate a portion of each class's 0.25% service fee attributable to accounts for which there is no financial intermediary specified on the account except for accounts attributable to MFS or its affiliates' seed money. There were no service fee rebates for the six months ended February 29, 2024.
Certain Class A shares are subject to a contingent deferred sales charge (CDSC) in the event of a shareholder redemption within 18 months of purchase. Class B shares are subject to a CDSC in the event of a shareholder redemption within six years of purchase. Class C shares are subject to a CDSC in the event of a shareholder redemption within 12 months of purchase.  All contingent deferred sales charges are paid to MFD and during the six months ended February 29, 2024, were as follows:
  Amount
Class A $33
Class B
Class C 25
Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 29, 2024, the fee was $2,456, which equated to 0.0008% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. Class R6 shares do not incur sub-accounting fees. For the six months ended February 29, 2024, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $127,087.
Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund.  Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services.  The fund is charged an annual fixed amount of $17,500 plus a fee based on average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.0158% of the fund's average daily net assets.
Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.
Other — The fund invests in the MFS Institutional Money Market Portfolio which is managed by MFS and seeks current income consistent with preservation of capital and liquidity. This money market fund does not pay a management fee to MFS but does incur investment and operating costs.
On June 23, 2023, MFS redeemed 6,359 shares of Class R3 for an aggregate amount of $74,464.
33

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Notes to Financial Statements (unaudited) - continued
At February 29, 2024, MFS held approximately 51% of the outstanding shares of Class B.
The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended February 29, 2024, this reimbursement amounted to $22,577, which is included in “Other” income in the Statement of Operations.
(4) Portfolio Securities
For the six months ended February 29, 2024, purchases and sales of investments, other than short-term obligations, aggregated $179,443,462 and $164,194,135, respectively.
(5) Shares of Beneficial Interest
The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows:
  Six months ended
2/29/24
  Year ended
8/31/23
  Shares Amount   Shares Amount
Shares sold          
Class A 185,285 $2,208,088   1,185,812 $13,339,784
Class B   327 3,827
Class C 4,344 47,598   14,132 155,634
Class I 2,412,555 28,157,102   9,780,227 107,922,482
Class R1 9,899 112,309   47,712 495,278
Class R2 33,281 384,504   185,751 2,154,293
Class R3 22,736 268,824   74,714 870,256
Class R4 23,363 284,825   1,381 15,628
Class R6 2,306,409 27,004,656   7,020,399 77,491,175
  4,997,872 $58,467,906   18,310,455 $202,448,357
Shares issued to shareholders
in reinvestment of distributions
         
Class A 57,104 $688,102   48,487 $546,445
Class B 215 2,535   257 2,838
Class C 825 9,656   672 7,387
Class I 630,804 7,493,954   494,936 5,503,685
Class R1 1,756 20,382   1,649 17,970
Class R2 5,918 69,777   3,064 33,852
Class R3 2,895 34,451   1,423 15,862
Class R4 952 11,319   829 9,228
Class R6 854,194 10,164,913   771,681 8,596,530
  1,554,663 $18,495,089   1,322,998 $14,733,797
34

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Notes to Financial Statements (unaudited) - continued
  Six months ended
2/29/24
  Year ended
8/31/23
  Shares Amount   Shares Amount
Shares reacquired          
Class A (428,369) $(5,087,219)   (660,168) $(7,500,187)
Class B (1,417) (16,016)   (2,669) (28,943)
Class C (757) (8,498)   (10,280) (113,992)
Class I (2,492,771) (29,687,853)   (5,590,963) (62,844,924)
Class R1 (1,622) (18,841)   (2,904) (32,072)
Class R2 (37,571) (439,036)   (73,424) (852,422)
Class R3 (8,668) (102,091)   (22,102) (259,340)
Class R4 (192) (2,271)   (14) (152)
Class R6 (993,851) (11,788,313)   (6,786,078) (75,120,715)
  (3,965,218) $(47,150,138)   (13,148,602) $(146,752,747)
Net change          
Class A (185,980) $(2,191,029)   574,131 $6,386,042
Class B (1,202) (13,481)   (2,085) (22,278)
Class C 4,412 48,756   4,524 49,029
Class I 550,588 5,963,203   4,684,200 50,581,243
Class R1 10,033 113,850   46,457 481,176
Class R2 1,628 15,245   115,391 1,335,723
Class R3 16,963 201,184   54,035 626,778
Class R4 24,123 293,873   2,196 24,704
Class R6 2,166,752 25,381,256   1,006,002 10,966,990
  2,587,317 $29,812,857   6,484,851 $70,429,407
The fund is one of several mutual funds in which certain MFS funds may invest. The MFS funds do not invest in the underlying funds for the purpose of exercising management or control. At the end of the period, the MFS Lifetime 2040 Fund, the MFS Lifetime 2050 Fund, the MFS Lifetime 2045 Fund, the MFS Lifetime 2035 Fund, the MFS Lifetime 2055 Fund, the MFS Lifetime 2030 Fund, the MFS Lifetime 2060 Fund, the MFS Lifetime Income Fund, and the MFS Lifetime 2025 Fund were the owners of record of approximately 10%, 9%, 7%, 6%, 6%, 5%, 3%, 2%, and 2%, respectively, of the value of outstanding voting shares of the fund. In addition, the MFS Lifetime 2065 Fund was the owner of record of less than 1% of the value of outstanding voting shares of the fund.
Effective June 1, 2019, purchases of the fund’s Class B shares were closed to new and existing investors subject to certain exceptions. Effective September 29, 2023, purchases of the fund's Class R1 and Class R2 shares were closed to new eligible investors.
(6) Line of Credit
The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks
35

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Notes to Financial Statements (unaudited) - continued
under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate) plus 0.10%, 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 13, 2025 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended February 29, 2024, the fund’s commitment fee and interest expense were $1,553 and $0, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.
(7) Investments in Affiliated Issuers
An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the following were affiliated issuers:
Affiliated Issuers Beginning
Value
Purchases Sales
Proceeds
Realized
Gain
(Loss)
Change in
Unrealized
Appreciation or
Depreciation
Ending
Value
MFS Institutional Money Market Portfolio  $6,449,765  $50,992,207  $55,535,821  $1,430  $(642)  $1,906,939
    
Affiliated Issuers Dividend
Income
Capital Gain
Distributions
MFS Institutional Money Market Portfolio  $151,200  $—
(8) Russia and Ukraine Conflict
The fund invests in securities and/or derivative instruments that are economically tied to Russia and/or Ukraine. Escalation of the conflict between Russia and Ukraine in late February 2022 caused market volatility and disruption in the tradability of Russian securities, including closure of the local securities market, temporary restriction on securities sales by non-residents, and disruptions to clearance and payment systems. To the extent that the fund is unable to sell securities, whether due to market constraints or to the sanctions imposed on Russia by the United States and other countries, those securities are considered illiquid and the value of those securities reflects their illiquid classification. Management continues to monitor these events and to evaluate the related impacts on fund performance.
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Table of Contents
Proxy Voting Policies and Information
MFS votes proxies on behalf of the fund pursuant to proxy voting policies and procedures that are available without charge, upon request, by calling 1-800-225-2606, by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available by August 31 of each year without charge by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Quarterly Portfolio Disclosure
The fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The fund's Form N-PORT reports are available on the SEC's Web site at  http://www.sec.gov. A shareholder can obtain the portfolio holdings report for the first and third quarters of the fund's fiscal year at mfs.com/openendfunds by choosing the fund's name and then scrolling to the “Resources” section and clicking on the “Prospectus and Reports” tab.
Further Information
From time to time, MFS may post important information about the fund or the MFS Funds on the MFS Web site (mfs.com). This information is available at https://www.mfs.com/announcements or at mfs.com/openendfunds by choosing the fund’s name and then scrolling to the “Resources” section and clicking on the “Announcements” tab, if any.
Information About Fund Contracts and Legal Claims
The fund has entered into contractual arrangements with an investment adviser, administrator, distributor, shareholder servicing agent, and custodian who each provide services to the fund. Unless expressly stated otherwise, shareholders are not parties to, or intended beneficiaries of these contractual arrangements, and these contractual arrangements are not intended to create any shareholder right to enforce them against the service providers or to seek any remedy under them against the service providers, either directly or on behalf of the fund.
Under the Trust’s By-Laws and Declaration of Trust, any claims asserted against or on behalf of the MFS Funds, including claims against Trustees and Officers, must be brought in state and federal courts located within the Commonwealth of Massachusetts.
Provision of Financial Reports and Summary Prospectuses
The fund produces financial reports every six months and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund’s annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund’s records. However, any shareholder may contact MFSC (please see back cover for address and telephone number) to request that copies of these reports and summary prospectuses be sent personally to that shareholder.
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Save paper with eDelivery.
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CONTACT
WEB SITE
mfs.com
MFS TALK
1-800-637-8255
24 hours a day
ACCOUNT SERVICE AND LITERATURE
Shareholders
1-800-225-2606
Financial advisors
1-800-343-2829
Retirement plan services
1-800-637-1255
MAILING ADDRESS
MFS Service Center, Inc.
P.O. Box 219341
Kansas City, MO 64121-9341
OVERNIGHT MAIL
MFS Service Center, Inc.
Suite 219341
430 W 7th Street
Kansas City, MO 64105-1407

Semiannual Report
February 29, 2024
MFS®  Global New
Discovery Fund
GND-SEM


MFS® Global New
Discovery Fund
CONTENTS

1

3

5

10

12

13

14

23

33

33

33

33

33
    

back cover
    
The report is prepared for the general information of shareholders. It is authorized for distribution to prospective investors only when preceded or accompanied by a current prospectus.
NOT FDIC INSURED  •  MAY LOSE VALUE  •  NO BANK GUARANTEE

Table of Contents

Table of Contents
Portfolio Composition
Portfolio structure
Top ten holdings
Howmet Aerospace, Inc. 2.5%
ICON PLC 2.1%
GFL Environmental, Inc. 2.1%
Cranswick PLC 2.1%
ASM International N.V. 2.1%
Wabtec Corp. 1.9%
LKQ Corp. 1.9%
AUB Group Ltd. 1.9%
NS Solutions Corp. 1.9%
STERIS PLC 1.8%
GICS equity sectors (g)
Industrials 30.3%
Consumer Discretionary 12.2%
Materials 11.1%
Information Technology 8.7%
Health Care 8.6%
Financials 7.6%
Real Estate 7.4%
Consumer Staples 5.0%
Communication Services 3.0%
Energy 1.7%
Issuer country weightings (x)
United States 42.7%
United Kingdom 11.1%
Japan 8.7%
Canada 5.5%
Germany 5.2%
France 3.9%
Netherlands 3.7%
Brazil 3.0%
Australia 2.9%
Other Countries 13.3%
Currency exposure weightings (y)
United States Dollar 47.0%
Euro 16.2%
British Pound Sterling 11.1%
Japanese Yen 8.7%
Brazilian Real 3.0%
Australian Dollar 2.9%
Swiss Franc 2.7%
Canadian Dollar 2.1%
Norwegian Krone 1.9%
Other Currencies 4.4%
 
1

Table of Contents
Portfolio Composition - continued
(g) The Global Industry Classification Standard (GICS®) was developed by and/or is the exclusive property of MSCI, Inc. and S&P Global Market Intelligence Inc. (“S&P Global Market Intelligence”). GICS is a service mark of MSCI and S&P Global Market Intelligence and has been licensed for use by MFS. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.
(x) Represents the portfolio’s exposure to issuer countries as a percentage of a portfolio’s net assets. For purposes of this presentation, United States includes Cash & Cash Equivalents.
(y) Represents the portfolio’s exposure to a particular currency as a percentage of a portfolio's net assets. For purposes of this presentation, United States Dollar includes Cash & Cash Equivalents.
Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities. Please see the Statement of Assets and Liabilities for additional information related to the fund’s cash position and other assets and liabilities.
Percentages are based on net assets as of February 29, 2024.
The portfolio is actively managed and current holdings may be different.
2

Table of Contents
Expense Table
Fund expenses borne by the shareholders during the period,
September 1, 2023 through February 29, 2024
As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds.
The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period September 1, 2023 through February 29, 2024.
Actual Expenses
The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.
Hypothetical Example for Comparison Purposes
The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.
Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads). Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.
3

Table of Contents
Expense Table - continued
Share
Class
  Annualized
Expense
Ratio
Beginning
Account Value
9/01/23
Ending
Account Value
2/29/24
Expenses
Paid During
Period (p)
9/01/23-2/29/24
A Actual 1.35% $1,000.00 $1,071.01 $6.95
Hypothetical (h) 1.35% $1,000.00 $1,018.15 $6.77
B Actual 2.10% $1,000.00 $1,066.38 $10.79
Hypothetical (h) 2.10% $1,000.00 $1,014.42 $10.52
C Actual 2.10% $1,000.00 $1,066.96 $10.79
Hypothetical (h) 2.10% $1,000.00 $1,014.42 $10.52
I Actual 1.10% $1,000.00 $1,072.00 $5.67
Hypothetical (h) 1.10% $1,000.00 $1,019.39 $5.52
R1 Actual 2.10% $1,000.00 $1,066.99 $10.79
Hypothetical (h) 2.10% $1,000.00 $1,014.42 $10.52
R2 Actual 1.60% $1,000.00 $1,069.38 $8.23
Hypothetical (h) 1.60% $1,000.00 $1,016.91 $8.02
R3 Actual 1.35% $1,000.00 $1,070.53 $6.95
Hypothetical (h) 1.35% $1,000.00 $1,018.15 $6.77
R4 Actual 1.10% $1,000.00 $1,071.94 $5.67
Hypothetical (h) 1.10% $1,000.00 $1,019.39 $5.52
R6 Actual 1.00% $1,000.00 $1,072.61 $5.15
Hypothetical (h) 1.00% $1,000.00 $1,019.89 $5.02
(h) 5% class return per year before expenses.
(p) “Expenses Paid During Period” are equal to each class’s annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period).  Expenses paid do not include any applicable sales charges (loads). If these transaction costs had been included, your costs would have been higher.
4

Table of Contents
Portfolio of Investments
2/29/24 (unaudited)
The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.
Issuer     Shares/Par Value ($)
Common Stocks – 95.6%
Aerospace & Defense – 5.6%  
Howmet Aerospace, Inc.   28,056 $1,867,127
Melrose Industries PLC   118,010 945,921
Singapore Technologies Engineering Ltd.   194,000 573,832
Teledyne Technologies, Inc. (a)   1,926 822,922
        $4,209,802
Apparel Manufacturers – 2.0%  
Burberry Group PLC   42,567 $690,460
Skechers USA, Inc., “A” (a)   13,685 845,870
        $1,536,330
Automotive – 2.8%  
Lear Corp.   5,052 $693,892
LKQ Corp.   27,723 1,449,636
        $2,143,528
Brokerage & Asset Managers – 4.1%  
B3 S.A. - Brasil Bolsa Balcao   341,200 $880,609
Cboe Global Markets, Inc.   4,475 859,200
Euronext N.V.   14,393 1,326,145
        $3,065,954
Business Services – 4.1%  
Elis S.A.   16,588 $378,287
Gruppo Mutuionline S.p.A. (l)   11,734 431,826
NS Solutions Corp.   42,400 1,416,916
RS Group PLC   88,639 843,195
        $3,070,224
Chemicals – 3.6%  
Borregaard ASA   43,015 $745,178
Element Solutions, Inc.   33,637 790,469
IMCD Group N.V.   4,021 612,337
UPL Ltd.   104,156 590,018
        $2,738,002
Computer Software – 2.6%  
Dun & Bradstreet Holdings, Inc.   41,505 $437,463
Kinaxis, Inc. (a)   6,167 639,261
OBIC Co. Ltd.   2,500 390,625
5

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Computer Software – continued  
Totvs S.A.   78,300 $483,400
        $1,950,749
Computer Software - Systems – 2.3%  
Amadeus IT Group S.A.   10,282 $604,313
Kardex AG   2,313 614,638
Rapid7, Inc. (a)   9,029 528,919
        $1,747,870
Construction – 5.2%  
Allegion PLC   4,538 $580,274
AZEK Co., Inc. (a)   15,091 726,028
Breedon Group PLC   172,738 804,594
Mid-America Apartment Communities, Inc., REIT   5,111 642,351
Summit Materials, Inc., “A” (a)   26,954 1,151,205
        $3,904,452
Consumer Services – 1.2%  
Boyd Group Services, Inc.   3,994 $937,353
Containers – 1.2%  
Mayr-Melnhof Karton AG   2,846 $362,963
Verallia S.A.   14,954 552,750
        $915,713
Electrical Equipment – 1.3%  
nVent Electric PLC   14,643 $985,767
Electronics – 2.1%  
ASM International N.V.   2,556 $1,557,234
Energy - Independent – 0.7%  
Diamondback Energy, Inc.   2,797 $510,508
Engineering - Construction – 3.0%  
Corporacion Inmobiliaria Vesta S.A.B. de C.V. (l)   194,965 $683,466
Jacobs Solutions, Inc.   8,631 1,265,736
JGC Corp.   39,100 355,348
        $2,304,550
Entertainment – 2.1%  
CTS Eventim AG   10,711 $841,607
Lottery Corp. Ltd.   229,953 759,305
        $1,600,912
6

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Food & Beverages – 5.0%  
Bakkafrost P/F   10,803 $674,342
Cranswick PLC   32,115 1,559,120
S Foods, Inc.   21,600 450,240
Toyo Suisan Kaisha Ltd.   8,900 516,832
Universal Robina Corp.   278,500 579,641
        $3,780,175
General Merchandise – 1.4%  
B&M European Value Retail S.A.   156,268 $1,037,177
Insurance – 1.9%  
AUB Group Ltd.   72,362 $1,421,406
Internet – 1.4%  
Digital Garage, Inc.   14,300 $331,460
Scout24 AG   10,426 757,238
        $1,088,698
Machinery & Tools – 11.1%  
AGCO Corp.   5,961 $653,922
Azbil Corp.   13,000 380,756
IDEX Corp.   3,201 755,116
Ingersoll Rand, Inc.   13,965 1,275,423
Interpump Group S.p.A   10,151 481,197
RB Global, Inc.   13,993 1,062,208
SIG Combibloc Group AG   25,536 505,320
VAT Group AG   1,003 502,209
Veralto Corp.   10,723 926,682
Wabtec Corp.   10,265 1,450,342
Zurn Elkay Water Solutions Corp.   12,833 407,448
        $8,400,623
Medical & Health Technology & Services – 3.3%  
AS ONE Corp.   13,100 $455,948
ICON PLC (a)   5,043 1,616,887
Selcuk Ecza Deposu Ticaret ve Sanayi A.S.   227,226 437,624
        $2,510,459
Medical Equipment – 5.2%  
Bruker BioSciences Corp.   9,371 $810,966
Envista Holdings Corp. (a)   22,910 473,092
Gerresheimer AG   7,455 873,418
STERIS PLC   5,930 1,381,156
Tecan Group AG   1,080 421,082
        $3,959,714
7

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Oil Services – 1.0%  
TechnipFMC PLC   35,262 $764,833
Other Banks & Diversified Financials – 1.1%  
Shizuoka Financial Group, Inc.   81,400 $795,431
Pollution Control – 2.7%  
Daiseki Co. Ltd.   17,900 $473,409
GFL Environmental, Inc.   43,239 1,560,063
        $2,033,472
Printing & Publishing – 0.8%  
Wolters Kluwer N.V.   3,914 $616,982
Real Estate – 4.5%  
Big Yellow Group PLC, REIT   37,691 $477,201
Catena AB   12,406 507,901
LEG Immobilien SE (a)   5,901 433,818
Sun Communities, Inc., REIT   6,642 888,434
Tritax Big Box PLC, REIT   229,016 423,801
Unite Group PLC, REIT   55,935 677,824
        $3,408,979
Restaurants – 1.8%  
Pluxee N.V. (a)   9,453 $270,081
Sodexo   5,337 425,118
Yum China Holdings, Inc.   15,302 656,303
        $1,351,502
Specialty Chemicals – 3.9%  
Axalta Coating Systems Ltd. (a)   18,834 $616,437
Chemours Co.   17,169 337,714
Croda International PLC   6,037 363,193
Essentra PLC   294,728 619,810
Symrise AG   9,744 995,841
        $2,932,995
Specialty Stores – 3.9%  
Burlington Stores, Inc. (a)   5,138 $1,053,804
Multiplan Empreendimentos Imobiliarios S.A.   166,795 886,133
NISHIMATSUYA CHAIN Co., Ltd.   37,300 558,057
ZOZO, Inc.   19,300 436,927
        $2,934,921
Telecommunications - Wireless – 0.9%  
Wireless Infrastructure Italian S.p.A.   64,090 $708,962
8

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Trucking – 1.8%  
Saia, Inc. (a)   1,053 $605,896
XPO, Inc. (a)   6,445 775,463
        $1,381,359
Total Common Stocks (Identified Cost, $57,221,357)   $72,306,636
Investment Companies (h) – 2.9%
Money Market Funds – 2.9%  
MFS Institutional Money Market Portfolio, 5.37% (v) (Identified Cost, $2,219,858)     2,219,920 $2,219,920
Collateral for Securities Loaned – 0.4%
State Street Navigator Securities Lending Government Money Market Portfolio, 5.34% (j) (Identified Cost, $283,926)     283,926 $283,926
Other Assets, Less Liabilities – 1.1%   851,793
Net Assets – 100.0% $75,662,275
    
(a) Non-income producing security.      
(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $2,219,920 and $72,590,562, respectively.      
(j) The rate quoted is the annualized seven-day yield of the fund at period end.      
(l) A portion of this security is on loan. See Note 2 for additional information.      
(v) Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.      
    
The following abbreviations are used in this report and are defined:
REIT Real Estate Investment Trust
See Notes to Financial Statements
9

Table of Contents
Financial Statements
Statement of Assets and Liabilities
At 2/29/24 (unaudited)
This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund.
Assets  
Investments in unaffiliated issuers, at value, including $427,029 of securities on loan (identified cost, $57,505,283) $72,590,562
Investments in affiliated issuers, at value (identified cost, $2,219,858) 2,219,920
Foreign currency, at value (identified cost, $3) 3
Receivables for  
Investments sold 1,179,844
Fund shares sold 96,674
Interest and dividends 140,620
Receivable from investment adviser 21,423
Other assets 42,416
Total assets $76,291,462
Liabilities  
Payables for  
Investments purchased $225,957
Fund shares reacquired 50,390
Collateral for securities loaned, at value (c) 283,926
Payable to affiliates  
Administrative services fee 116
Shareholder servicing costs 16,311
Distribution and service fees 545
Payable for independent Trustees' compensation 566
Accrued expenses and other liabilities 51,376
Total liabilities $629,187
Net assets $75,662,275
Net assets consist of  
Paid-in capital $68,478,404
Total distributable earnings (loss) 7,183,871
Net assets $75,662,275
Shares of beneficial interest outstanding 3,391,990
    
(c) Non-cash collateral is not included.
10

Table of Contents
Statement of Assets and Liabilities (unaudited) – continued
  Net assets Shares
outstanding
Net asset value
per share (a)
Class A $26,653,572 1,210,990 $22.01
Class B 1,353,314 68,507 19.75
Class C 1,468,968 74,367 19.75
Class I 19,676,959 869,824 22.62
Class R1 139,386 7,062 19.74
Class R2 192,843 9,069 21.27
Class R3 804,763 36,573 22.00
Class R4 189,025 8,349 22.64
Class R6 25,183,445 1,107,249 22.74
    
(a) Maximum offering price per share was equal to the net asset value per share for all share classes, except for Class A, for which the maximum offering price per share was $23.35 [100 / 94.25 x $22.01]. On sales of $50,000 or more, the maximum offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. Redemption price per share was equal to the net asset value per share for Classes I, R1, R2, R3, R4, and R6.
See Notes to Financial Statements
11

Table of Contents
Financial Statements
Statement of Operations
Six months ended 2/29/24 (unaudited)
This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations.
Net investment income (loss)  
Income  
Dividends $410,512
Dividends from affiliated issuers 66,233
Income on securities loaned 691
Interest 46
Other 2
Foreign taxes withheld (24,984)
Total investment income $452,500
Expenses  
Management fee $336,761
Distribution and service fees 46,874
Shareholder servicing costs 32,874
Administrative services fee 10,068
Independent Trustees' compensation 1,671
Custodian fee 12,155
Shareholder communications 7,839
Audit and tax fees 37,343
Legal fees 178
Registration fees 61,829
Miscellaneous 15,665
Total expenses $563,257
Reduction of expenses by investment adviser (147,734)
Net expenses $415,523
Net investment income (loss) $36,977
Realized and unrealized gain (loss)
Realized gain (loss) (identified cost basis)  
Unaffiliated issuers $(1,379,168)
Affiliated issuers (65)
Foreign currency 1,863
Net realized gain (loss) $(1,377,370)
Change in unrealized appreciation or depreciation  
Unaffiliated issuers $6,370,928
Affiliated issuers (142)
Translation of assets and liabilities in foreign currencies (1,140)
Net unrealized gain (loss) $6,369,646
Net realized and unrealized gain (loss) $4,992,276
Change in net assets from operations $5,029,253
See Notes to Financial Statements
12

Table of Contents
Financial Statements
Statements of Changes in Net Assets
These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions.
  Six months ended Year ended
  2/29/24
(unaudited)
8/31/23
Change in net assets    
From operations    
Net investment income (loss) $36,977 $243,927
Net realized gain (loss) (1,377,370) (1,753,970)
Net unrealized gain (loss) 6,369,646 9,096,193
Change in net assets from operations $5,029,253 $7,586,150
Change in net assets from fund share transactions $1,831,973 $(2,518,809)
Total change in net assets $6,861,226 $5,067,341
Net assets    
At beginning of period 68,801,049 63,733,708
At end of period $75,662,275 $68,801,049
See Notes to Financial Statements
13

Table of Contents
Financial Statements
Financial Highlights
The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period.
Class A  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $20.56 $18.22 $27.56 $21.57 $18.72 $21.27
Income (loss) from investment operations
Net investment income (loss) (d) $(0.00)(w) $0.05 $(0.10) $(0.06) $(0.06) $(0.03)
Net realized and unrealized gain (loss) 1.45 2.29 (7.66) 6.96 3.49 (0.62)
 Total from investment operations  $1.45  $2.34  $(7.76)  $6.90  $3.43  $(0.65)
Less distributions declared to shareholders
From net investment income $— $— $— $— $— $(0.02)
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.58)  $(0.91)  $(0.58)  $(1.90)
 Net asset value, end of period (x)  $22.01  $20.56  $18.22  $27.56  $21.57  $18.72
 Total return (%) (r)(s)(t)(x) 7.05(n) 12.84 (29.71) 32.82 18.63 (1.65)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.78(a) 1.78 1.67 1.68 1.97 2.04
Expenses after expense reductions 1.35(a) 1.35 1.35 1.34 1.49 1.51
Net investment income (loss) (0.04)(a)(l) 0.26 (0.45) (0.26) (0.32) (0.16)
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $26,654 $24,868 $23,856 $44,743 $17,029 $11,255
See Notes to Financial Statements
14

Table of Contents
Financial Highlights – continued
Class B  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $18.52 $16.54 $25.35 $20.05 $17.57 $20.21
Income (loss) from investment operations
Net investment income (loss) (d) $(0.07) $(0.09) $(0.24) $(0.25) $(0.19) $(0.16)
Net realized and unrealized gain (loss) 1.30 2.07 (6.99) 6.46 3.25 (0.60)
 Total from investment operations  $1.23  $1.98  $(7.23)  $6.21  $3.06  $(0.76)
Less distributions declared to shareholders
From net investment income $— $— $— $— $— $—
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.58)  $(0.91)  $(0.58)  $(1.88)
 Net asset value, end of period (x)  $19.75  $18.52  $16.54  $25.35  $20.05  $17.57
 Total return (%) (r)(s)(t)(x) 6.64(n) 11.97 (30.24) 31.84 17.72 (2.35)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.53(a) 2.53 2.43 2.46 2.72 2.79
Expenses after expense reductions 2.10(a) 2.10 2.10 2.10 2.24 2.26
Net investment income (loss) (0.79)(a)(l) (0.52) (1.15) (1.12) (1.08) (0.91)
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $1,353 $1,518 $1,739 $2,979 $2,678 $2,508
See Notes to Financial Statements
15

Table of Contents
Financial Highlights – continued
Class C  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $18.52 $16.54 $25.35 $20.05 $17.57 $20.21
Income (loss) from investment operations
Net investment income (loss) (d) $(0.07) $(0.09) $(0.24) $(0.25) $(0.19) $(0.16)
Net realized and unrealized gain (loss) 1.30 2.07 (6.99) 6.46 3.25 (0.60)
 Total from investment operations  $1.23  $1.98  $(7.23)  $6.21  $3.06  $(0.76)
Less distributions declared to shareholders
From net investment income $— $— $— $— $— $—
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.58)  $(0.91)  $(0.58)  $(1.88)
 Net asset value, end of period (x)  $19.75  $18.52  $16.54  $25.35  $20.05  $17.57
 Total return (%) (r)(s)(t)(x) 6.64(n) 11.97 (30.24) 31.84 17.72 (2.35)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.53(a) 2.54 2.43 2.46 2.72 2.78
Expenses after expense reductions 2.10(a) 2.10 2.10 2.10 2.24 2.26
Net investment income (loss) (0.79)(a)(l) (0.54) (1.16) (1.13) (1.08) (0.91)
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $1,469 $1,578 $2,137 $3,896 $3,422 $3,287
See Notes to Financial Statements
16

Table of Contents
Financial Highlights – continued
Class I  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $21.11 $18.66 $28.15 $21.96 $19.00 $21.54
Income (loss) from investment operations
Net investment income (loss) (d) $0.02 $0.10 $(0.06) $(0.00)(w) $(0.02) $0.01
Net realized and unrealized gain (loss) 1.49 2.35 (7.83) 7.10 3.56 (0.62)
 Total from investment operations  $1.51  $2.45  $(7.89)  $7.10  $3.54  $(0.61)
Less distributions declared to shareholders
From net investment income $— $— $(0.02) $— $— $(0.05)
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.60)  $(0.91)  $(0.58)  $(1.93)
 Net asset value, end of period (x)  $22.62  $21.11  $18.66  $28.15  $21.96  $19.00
 Total return (%) (r)(s)(t)(x) 7.15(n) 13.13 (29.55) 33.16 18.94 (1.41)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.53(a) 1.54 1.40 1.43 1.72 1.76
Expenses after expense reductions 1.10(a) 1.10 1.10 1.09 1.24 1.26
Net investment income (loss) 0.21(a)(l) 0.50 (0.26) (0.02) (0.09) 0.05
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $19,677 $17,671 $20,703 $61,502 $18,688 $14,059
See Notes to Financial Statements
17

Table of Contents
Financial Highlights – continued
Class R1  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $18.51 $16.53 $25.33 $20.04 $17.56 $20.20
Income (loss) from investment operations
Net investment income (loss) (d) $(0.07) $(0.08) $(0.23) $(0.25) $(0.19) $(0.16)
Net realized and unrealized gain (loss) 1.30 2.06 (6.99) 6.45 3.25 (0.60)
 Total from investment operations  $1.23  $1.98  $(7.22)  $6.20  $3.06  $(0.76)
Less distributions declared to shareholders
From net investment income $— $— $— $— $— $—
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.58)  $(0.91)  $(0.58)  $(1.88)
 Net asset value, end of period (x)  $19.74  $18.51  $16.53  $25.33  $20.04  $17.56
 Total return (%) (r)(s)(t)(x) 6.65(n) 11.98 (30.22) 31.80 17.73 (2.35)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.53(a) 2.53 2.43 2.45 2.72 2.79
Expenses after expense reductions 2.10(a) 2.10 2.10 2.09 2.24 2.26
Net investment income (loss) (0.79)(a)(l) (0.48) (1.13) (1.11) (1.08) (0.92)
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $139 $130 $114 $160 $120 $101
See Notes to Financial Statements
18

Table of Contents
Financial Highlights – continued
Class R2  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $19.89 $17.67 $26.85 $21.09 $18.36 $20.93
Income (loss) from investment operations
Net investment income (loss) (d) $(0.03) $(0.00)(w) $(0.13) $(0.14) $(0.11) $(0.07)
Net realized and unrealized gain (loss) 1.41 2.22 (7.47) 6.81 3.42 (0.62)
 Total from investment operations  $1.38  $2.22  $(7.60)  $6.67  $3.31  $(0.69)
Less distributions declared to shareholders
From net investment income $— $— $— $— $— $—
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.58)  $(0.91)  $(0.58)  $(1.88)
 Net asset value, end of period (x)  $21.27  $19.89  $17.67  $26.85  $21.09  $18.36
 Total return (%) (r)(s)(t)(x) 6.94(n) 12.56 (29.91) 32.47 18.33 (1.89)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 2.03(a) 2.04 1.94 1.95 2.22 2.29
Expenses after expense reductions 1.60(a) 1.60 1.60 1.59 1.74 1.76
Net investment income (loss) (0.29)(a)(l) (0.00) (0.61) (0.61) (0.58) (0.41)
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $193 $179 $225 $237 $178 $218
See Notes to Financial Statements
19

Table of Contents
Financial Highlights – continued
Class R3  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $20.56 $18.22 $27.56 $21.57 $18.72 $21.26
Income (loss) from investment operations
Net investment income (loss) (d) $(0.00)(w) $0.07 $(0.08) $(0.09) $(0.06) $(0.03)
Net realized and unrealized gain (loss) 1.44 2.27 (7.68) 6.99 3.49 (0.62)
 Total from investment operations  $1.44  $2.34  $(7.76)  $6.90  $3.43  $(0.65)
Less distributions declared to shareholders
From net investment income $— $— $— $— $— $(0.01)
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.58)  $(0.91)  $(0.58)  $(1.89)
 Net asset value, end of period (x)  $22.00  $20.56  $18.22  $27.56  $21.57  $18.72
 Total return (%) (r)(s)(t)(x) 7.00(n) 12.84 (29.71) 32.82 18.63 (1.63)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.78(a) 1.76 1.68 1.70 1.97 2.04
Expenses after expense reductions 1.35(a) 1.35 1.35 1.34 1.49 1.51
Net investment income (loss) (0.04)(a)(l) 0.34 (0.37) (0.35) (0.31) (0.16)
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $805 $731 $189 $294 $206 $152
See Notes to Financial Statements
20

Table of Contents
Financial Highlights – continued
Class R4  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $21.13 $18.67 $28.15 $21.96 $19.00 $21.56
Income (loss) from investment operations
Net investment income (loss) (d) $0.03 $0.08 $(0.03) $(0.03) $(0.02) $0.02
Net realized and unrealized gain (loss) 1.48 2.38 (7.85) 7.13 3.56 (0.64)
 Total from investment operations  $1.51  $2.46  $(7.88)  $7.10  $3.54  $(0.62)
Less distributions declared to shareholders
From net investment income $— $— $(0.02) $— $— $(0.06)
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.60)  $(0.91)  $(0.58)  $(1.94)
 Net asset value, end of period (x)  $22.64  $21.13  $18.67  $28.15  $21.96  $19.00
 Total return (%) (r)(s)(t)(x) 7.15(n) 13.18 (29.53) 33.16 18.94 (1.43)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.53(a) 1.56 1.43 1.45 1.72 1.78
Expenses after expense reductions 1.10(a) 1.10 1.10 1.09 1.24 1.26
Net investment income (loss) 0.27(a)(l) 0.41 (0.13) (0.11) (0.08) 0.08
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $189 $93 $82 $116 $87 $73
See Notes to Financial Statements
21

Table of Contents
Financial Highlights – continued
Class R6  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $21.21 $18.73 $28.24 $22.01 $19.03 $21.58
Income (loss) from investment operations
Net investment income (loss) (d) $0.03 $0.12 $(0.01) $(0.00)(w) $0.01 $0.05
Net realized and unrealized gain (loss) 1.50 2.36 (7.88) 7.14 3.55 (0.64)
 Total from investment operations  $1.53  $2.48  $(7.89)  $7.14  $3.56  $(0.59)
Less distributions declared to shareholders
From net investment income $— $— $(0.04) $— $— $(0.08)
From net realized gain (1.58) (0.91) (0.58) (1.88)
 Total distributions declared to shareholders  $—  $—  $(1.62)  $(0.91)  $(0.58)  $(1.96)
 Net asset value, end of period (x)  $22.74  $21.21  $18.73  $28.24  $22.01  $19.03
 Total return (%) (r)(s)(t)(x) 7.21(n) 13.24 (29.49) 33.27 19.01 (1.26)
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions 1.43(a) 1.43 1.33 1.37 1.62 1.69
Expenses after expense reductions 1.00(a) 1.01 1.00 1.01 1.15 1.16
Net investment income (loss) 0.31(a)(l) 0.62 (0.03) (0.01) 0.03 0.24
Portfolio turnover 22(n) 29 36 36 84 55
Net assets at end of period (000 omitted) $25,183 $22,034 $14,688 $20,788 $13,432 $13,382
    
(a) Annualized.
(d) Per share data is based on average shares outstanding.
(l) Recognition of net investment income by the fund may be affected by the timing of the declaration of dividends by companies in which the fund invests and the actual annual net investment income ratio may differ.
(n) Not annualized.
(r) Certain expenses have been reduced without which performance would have been lower.
(s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.
(t) Total returns do not include any applicable sales charges.
(w) Per share amount was less than $0.01.
(x) The net asset values and total returns have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted accounting principles required at period end for financial reporting purposes.
See Notes to Financial Statements
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Notes to Financial Statements
(unaudited) 
(1) Business and Organization
MFS Global New Discovery Fund (the fund) is a diversified series of MFS Series Trust IV (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.
The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.
(2) Significant Accounting Policies
General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions.
Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.
Investment Valuations Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.
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Notes to Financial Statements (unaudited) - continued
Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value.
Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.
Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.
Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted
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Notes to Financial Statements (unaudited) - continued
quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of February 29, 2024 in valuing the fund's assets and liabilities:
Financial Instruments Level 1 Level 2 Level 3 Total
Equity Securities $72,306,636 $— $— $72,306,636
Mutual Funds 2,503,846 2,503,846
Total $74,810,482 $— $— $74,810,482
For further information regarding security characteristics, see the Portfolio of Investments.
The following is a reconciliation of level 3 assets for which significant unobservable inputs were used to determine fair value. The table presents the activity of level 3 securities held at the beginning and the end of the period.
  Equity
Securities
Balance as of 8/31/23 $0
Realized gain (loss) (747,538)
Change in unrealized appreciation or depreciation 1,010,785
Sales (263,247)
Balance as of 2/29/24 $—
Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.
Security Loans — Under its Securities Lending Agency Agreement with the fund, State Street Bank and Trust Company, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund.  Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within three business days.  The loans are collateralized by cash and/or U.S. Treasury and federal agency obligations in an amount typically at least equal to the market value of the securities loaned.  On loans collateralized by cash, the cash collateral is invested in a money market fund.  The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day.  The lending agent provides the fund with indemnification against Borrower default.  In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities
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Notes to Financial Statements (unaudited) - continued
identical to those loaned or, when such purchase is commercially impracticable, pay the fund the market value of the loaned securities.  In return, the lending agent assumes the fund's rights to the related collateral.  If the collateral value is less than the cost to purchase identical securities, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. At period end, the fund had investment securities on loan, all of which were classified as equity securities in the fund's Portfolio of Investments, with a fair value of $427,029. The fair value of the fund's investment securities on loan and a related liability of $283,926 for cash collateral received on securities loaned are both presented gross in the Statement of Assets and Liabilities. Additionally, these loans were collateralized by U.S. Treasury Obligations of $166,842 held by the custodian. The collateral on securities loaned exceeded the value of securities on loan at period end. The liability for cash collateral for securities loaned is carried at fair value, which is categorized as level 2 within the fair value hierarchy. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent.  On loans collateralized by U.S. Treasury and/or federal agency obligations, a fee is received from the Borrower, and is allocated between the fund and the lending agent.  Income from securities lending is separately reported in the Statement of Operations.  The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income.
Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.
Investment Transactions and Income —  Interest income is recorded on the accrual basis. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date.
The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.
Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.
Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for a three
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Notes to Financial Statements (unaudited) - continued
year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.
Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.
Book/tax differences primarily relate to net operating losses, passive foreign investment companies, and wash sale loss deferrals.
The fund declared no distributions for the current period or for the year ended August 31, 2023.
The federal tax cost and the tax basis components of distributable earnings were as follows:
As of 2/29/24  
Cost of investments $60,793,795
Gross appreciation 16,755,865
Gross depreciation (2,739,178)
Net unrealized appreciation (depreciation) $14,016,687
As of 8/31/23  
Capital loss carryforwards (5,489,994)
Other temporary differences (1,286)
Net unrealized appreciation (depreciation) 7,645,898
The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.
As of August 31, 2023, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows:
Short-Term $(2,918,398)
Long-Term (2,571,596)
Total $(5,489,994)
Multiple Classes of Shares of Beneficial Interest — The fund offers multiple classes of shares, which differ in their respective distribution and service fees. The fund's income, realized and unrealized gain (loss), and common expenses are allocated to shareholders based on the daily net assets of each class. Dividends are declared
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Notes to Financial Statements (unaudited) - continued
separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class C shares will convert to Class A shares approximately eight years after purchase.
(3) Transactions with Affiliates
Investment Adviser — The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates based on the fund's average daily net assets:
Up to $1 billion 0.975%
In excess of $1 billion and up to $2.5 billion 0.90%
In excess of $2.5 billion 0.85%
MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this management fee reduction amounted to $4,447, which is included in the reduction of total expenses in the Statement of Operations. The management fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.96% of the fund's average daily net assets.
The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses, such that total fund operating expenses do not exceed the following rates annually of each class’s average daily net assets:
Classes
A B C I R1 R2 R3 R4 R6
1.35% 2.10% 2.10% 1.10% 2.10% 1.60% 1.35% 1.10% 1.01%
This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this reduction amounted to $143,287, which is included in the reduction of total expenses in the Statement of Operations.
Distributor — MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $1,384 for the six months ended February 29, 2024, as its portion of the initial sales charge on sales of Class A shares of the fund.
The Board of Trustees has adopted a distribution plan for certain share classes pursuant to Rule 12b-1 of the Investment Company Act of 1940.
The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. The distribution and service fees are computed daily and paid monthly.
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Notes to Financial Statements (unaudited) - continued
Distribution Plan Fee Table:
  Distribution
Fee Rate (d)
Service
Fee Rate (d)
Total
Distribution
Plan (d)
Annual
Effective
Rate (e)
Distribution
and Service
Fee
Class A 0.25% 0.25% 0.25% $ 30,723
Class B 0.75% 0.25% 1.00% 1.00% 6,705
Class C 0.75% 0.25% 1.00% 1.00% 7,441
Class R1 0.75% 0.25% 1.00% 1.00% 645
Class R2 0.25% 0.25% 0.50% 0.50% 443
Class R3 0.25% 0.25% 0.25% 917
Total Distribution and Service Fees         $46,874
(d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees equal to these annual percentage rates of each class’s average daily net assets. The distribution and service fee rates disclosed by class represent the current rates in effect at the end of the reporting period. Any rate changes, if applicable, are detailed below.
(e) The annual effective rates represent actual fees incurred under the distribution plan for the six months ended February 29, 2024 based on each class's average daily net assets. MFD has voluntarily agreed to rebate a portion of each class's 0.25% service fee attributable to accounts for which there is no financial intermediary specified on the account except for accounts attributable to MFS or its affiliates' seed money. There were no service fee rebates
for the six months ended February 29, 2024.
Certain Class A shares are subject to a contingent deferred sales charge (CDSC) in the event of a shareholder redemption within 18 months of purchase. Class B shares are subject to a CDSC in the event of a shareholder redemption within six years of purchase. Class C shares are subject to a CDSC in the event of a shareholder redemption within 12 months of purchase.  All contingent deferred sales charges are paid to MFD and during the six months ended February 29, 2024, were as follows:
  Amount
Class A $35
Class B 217
Class C 14
Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 29, 2024, the fee was $5,716, which equated to 0.0166% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. Class R6 shares do not incur sub-accounting fees. For the six months ended February 29, 2024, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $27,158.
Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund.  Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services.  The fund is charged an annual fixed amount of $17,500 plus a fee based on
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Notes to Financial Statements (unaudited) - continued
average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.0292% of the fund's average daily net assets.
Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.
Other — The fund invests in the MFS Institutional Money Market Portfolio which is managed by MFS and seeks current income consistent with preservation of capital and liquidity. This money market fund does not pay a management fee to MFS but does incur investment and operating costs.
At February 29, 2024, MFS held approximately 65% and 53% of the outstanding shares of Class R1 and Class R4, respectively.
During the six months ended February 29, 2024, pursuant to a policy adopted by the Board of Trustees and designed to comply with Rule 17a-7 under the Investment Company Act of 1940 (the “Act”) and relevant guidance, the fund engaged in sale transactions with funds and accounts for which MFS serves as investment adviser or sub-adviser (“cross-trades”) which amounted to $24,503. The sales transactions resulted in net realized gains (losses) of $(19,606).
(4) Portfolio Securities
For the six months ended February 29, 2024, purchases and sales of investments, other than short-term obligations, aggregated $14,614,713 and $14,699,921, respectively.
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Notes to Financial Statements (unaudited) - continued
(5) Shares of Beneficial Interest
The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows:
  Six months ended
2/29/24
  Year ended
8/31/23
  Shares Amount   Shares Amount
Shares sold          
Class A 91,837 $1,881,707   238,781 $4,470,571
Class B 527 10,351   2 27
Class C 2,411 42,359   8,249 145,346
Class I 134,360 2,853,505   283,232 5,449,784
Class R1 20 351   160 2,720
Class R2 172 3,400   1,132 20,714
Class R3 1,377 28,225   25,873 453,360
Class R4 3,961 88,541   7,477 128,454
Class R6 154,193 3,226,811   483,983 9,930,084
  388,858 $8,135,250   1,048,889 $20,601,060
Shares reacquired          
Class A (90,171) $(1,844,784)   (338,627) $(6,243,871)
Class B (13,965) (247,654)   (23,187) (394,481)
Class C (13,207) (247,215)   (52,329) (868,786)
Class I (101,656) (2,146,423)   (555,645) (10,854,907)
Class R1   (5) (89)
Class R2 (91) (1,781)   (4,901) (91,970)
Class R3 (339) (6,907)   (728) (14,346)
Class R4   (7,477) (150,789)
Class R6 (85,678) (1,808,513)   (229,366) (4,500,630)
  (305,107) $(6,303,277)   (1,212,265) $(23,119,869)
Net change          
Class A 1,666 $36,923   (99,846) $(1,773,300)
Class B (13,438) (237,303)   (23,185) (394,454)
Class C (10,796) (204,856)   (44,080) (723,440)
Class I 32,704 707,082   (272,413) (5,405,123)
Class R1 20 351   155 2,631
Class R2 81 1,619   (3,769) (71,256)
Class R3 1,038 21,318   25,145 439,014
Class R4 3,961 88,541   (22,335)
Class R6 68,515 1,418,298   254,617 5,429,454
  83,751 $1,831,973   (163,376) $(2,518,809)
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Notes to Financial Statements (unaudited) - continued
Effective June 1, 2019, purchases of the fund’s Class B shares were closed to new and existing investors subject to certain exceptions. Effective September 29, 2023, purchases of the fund's Class R1 and Class R2 shares were closed to new eligible investors.
(6) Line of Credit
The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate) plus 0.10%, 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 13, 2025 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended February 29, 2024, the fund’s commitment fee and interest expense were $162 and $0, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.
(7) Investments in Affiliated Issuers
An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the following were affiliated issuers:
Affiliated Issuers Beginning
Value
Purchases Sales
Proceeds
Realized
Gain
(Loss)
Change in
Unrealized
Appreciation or
Depreciation
Ending
Value
MFS Institutional Money Market Portfolio  $1,435,476  $10,321,421  $9,536,770  $(65)  $(142)  $2,219,920
    
Affiliated Issuers Dividend
Income
Capital Gain
Distributions
MFS Institutional Money Market Portfolio  $66,233  $—
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Proxy Voting Policies and Information
MFS votes proxies on behalf of the fund pursuant to proxy voting policies and procedures that are available without charge, upon request, by calling 1-800-225-2606, by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available by August 31 of each year without charge by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Quarterly Portfolio Disclosure
The fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The fund's Form N-PORT reports are available on the SEC's Web site at  http://www.sec.gov. A shareholder can obtain the portfolio holdings report for the first and third quarters of the fund's fiscal year at mfs.com/openendfunds by choosing the fund's name and then scrolling to the “Resources” section and clicking on the “Prospectus and Reports” tab.
Further Information
From time to time, MFS may post important information about the fund or the MFS Funds on the MFS Web site (mfs.com). This information is available at https://www.mfs.com/announcements or at mfs.com/openendfunds by choosing the fund’s name and then scrolling to the “Resources” section and clicking on the “Announcements” tab, if any.
Information About Fund Contracts and Legal Claims
The fund has entered into contractual arrangements with an investment adviser, administrator, distributor, shareholder servicing agent, and custodian who each provide services to the fund. Unless expressly stated otherwise, shareholders are not parties to, or intended beneficiaries of these contractual arrangements, and these contractual arrangements are not intended to create any shareholder right to enforce them against the service providers or to seek any remedy under them against the service providers, either directly or on behalf of the fund.
Under the Trust’s By-Laws and Declaration of Trust, any claims asserted against or on behalf of the MFS Funds, including claims against Trustees and Officers, must be brought in state and federal courts located within the Commonwealth of Massachusetts.
Provision of Financial Reports and Summary Prospectuses
The fund produces financial reports every six months and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund’s annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund’s records. However, any shareholder may contact MFSC (please see back cover for address and telephone number) to request that copies of these reports and summary prospectuses be sent personally to that shareholder.
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CONTACT
WEB SITE
mfs.com
MFS TALK
1-800-637-8255
24 hours a day
ACCOUNT SERVICE AND LITERATURE
Shareholders
1-800-225-2606
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1-800-343-2829
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1-800-637-1255
MAILING ADDRESS
MFS Service Center, Inc.
P.O. Box 219341
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Semiannual Report
February 29, 2024
MFS®  U.S. Government
Money Market Fund
MCM-SEM


MFS® U.S. Government
Money Market Fund
CONTENTS

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back cover
    
The report is prepared for the general information of shareholders. It is authorized for distribution to prospective investors only when preceded or accompanied by a current prospectus.
NOT FDIC INSURED  •  MAY LOSE VALUE  •  NO BANK GUARANTEE

Table of Contents

Table of Contents
Portfolio Composition
Portfolio structure (u)
Maturity breakdown (u)
0 - 7 days 32.2%
8 - 29 days 31.0%
30 - 59 days 12.4%
60 - 89 days 17.2%
90 - 365 days 7.2%
Other Assets Less Liabilities (o) (0.0)%
 
Composition including fixed income credit quality (a)(u)
A-1+ 59.9%
A-1 40.1%
Other Assets Less Liabilities (o) (0.0)%
(a) Ratings are assigned to portfolio securities utilizing ratings from Moody’s, Fitch, and Standard & Poor’s rating agencies and applying the following hierarchy: If all three agencies provide a rating, the middle rating (after dropping the highest and lowest ratings) is assigned; if two of the three agencies rate a security, the lower of the two is assigned. Ratings are shown in the S&P scale. All ratings are subject to change. The fund did not hold unrated securities. The fund is not rated by these agencies.
(o) Less than 0.1%.
(u) For purposes of this presentation, accrued interest, where applicable, is included.
From time to time Other Assets Less Liabilities may be negative due to the timing of cash receipts and disbursements.
Percentages are based on net assets as of February 29, 2024.
The portfolio is actively managed and current holdings may be different.
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Table of Contents
Expense Table
Fund expenses borne by the shareholders during the period,
September 1, 2023 through February 29, 2024
As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments, and (2) ongoing costs, including management fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds.
The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period September 1, 2023 through February 29, 2024.
Actual Expenses
The first line in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.
Hypothetical Example for Comparison Purposes
The second line of the following table provides information about hypothetical account values and hypothetical expenses based on the fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.
Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads). Therefore, the second line of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.
  Annualized
Expense
Ratio
Beginning
Account Value
9/01/23
Ending
Account Value
2/29/24
Expenses
Paid During
Period (p)
9/01/23-2/29/24
Actual 0.45% $1,000.00 $1,024.76 $2.27
Hypothetical (h) 0.45% $1,000.00 $1,022.63 $2.26
(h) 5% fund return per year before expenses.
(p) “Expenses Paid During Period” are equal to the fund's annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period).  Expenses paid do not include any applicable sales charges (loads). If these transaction costs had been included, your costs would have been higher.
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Table of Contents
Portfolio of Investments
2/29/24 (unaudited)
The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.
Issuer     Shares/Par Value ($)
U.S. Government Agencies and Equivalents (y) – 73.4%
Fannie Mae, 5.24%, due 4/22/2024   $18,850,000 $18,709,232
Federal Farm Credit Bank, 5.29%, due 5/14/2024   7,950,000 7,864,697
Federal Farm Credit Bank, 5.16%, due 6/06/2024   12,000,000 11,835,423
Federal Home Loan Bank, 5.32%, due 3/18/2024   15,500,000 15,461,610
Federal Home Loan Bank, 5.33%, due 4/24/2024   15,600,000 15,476,916
Freddie Mac, 5.26%, due 3/18/2024   33,000,000 32,919,200
U.S. Treasury Bill, 5.29%, due 3/19/2024   18,800,000 18,750,937
U.S. Treasury Bill, 5.32%, due 3/05/2024   21,400,000 21,387,515
U.S. Treasury Bill, 5.27%, due 3/12/2024   11,900,000 11,881,109
U.S. Treasury Bill, 5.33%, due 3/26/2024   39,600,000 39,455,460
U.S. Treasury Bill, 5.34%, due 4/02/2024   13,300,000 13,237,726
U.S. Treasury Bill, 5.26%, due 4/30/2024   22,000,000 21,809,700
U.S. Treasury Bill, 5.29%, due 5/09/2024   17,700,000 17,522,878
U.S. Treasury Bill, 5.31%, due 5/23/2024   18,500,000 18,276,478
U.S. Treasury Bill, 5.15%, due 6/13/2024   16,000,000 15,765,307
Total U.S. Government Agencies and Equivalents, at Amortized Cost and Value     $280,354,188
Repurchase Agreements – 26.6%  
BofA Securities, Inc. Repurchase Agreement, 5.29%,
dated 2/29/2024, due 3/01/2024, total to be received $50,688,447 (secured by U.S. Treasury and/or U.S. Government Agency Securities valued at $51,823,830)
  $50,681,000 $50,681,000
Fixed Income Clearing Corp. – State Street Bank & Trust Co. Repurchase Agreement, 5.28%,
dated 2/29/2024, due 3/01/2024, total to be received $50,688,102 (secured by U.S. Treasury and/or U.S. Government Agency Securities valued at $51,694,287)
  50,680,669 50,680,669
Total Repurchase Agreements, at Cost and Value       $101,361,669
Other Assets, Less Liabilities – (0.0)%     (857)
Net Assets – 100.0%     $381,715,000
    
(y) The rate shown represents an annualized yield at time of purchase.
See Notes to Financial Statements
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Table of Contents
Financial Statements
Statement of Assets and Liabilities
At 2/29/24 (unaudited)
This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund.
Assets  
Investments in unaffiliated issuers, at cost and value $280,354,188
Investments in unaffiliated repurchase agreements, at cost and value 101,361,669
Receivables for  
Fund shares sold 511,952
Interest 14,880
Receivable from investment adviser and distributor 33,822
Other assets 6,213
Total assets $382,282,724
Liabilities  
Payables for  
Distributions $3,676
Fund shares reacquired 466,852
Payable to affiliates  
Administrative services fee 353
Shareholder servicing costs 60,883
Payable for independent Trustees' compensation 2,022
Accrued expenses and other liabilities 33,938
Total liabilities $567,724
Net assets $381,715,000
Net assets consist of  
Paid-in capital $381,717,570
Total distributable earnings (loss) (2,570)
Net assets $381,715,000
Shares of beneficial interest outstanding 381,715,657
Net asset value per share (net assets of $381,715,000 / 381,715,657 shares of beneficial interest outstanding) $1.00
A contingent deferred sales charge may be imposed on redemptions.
See Notes to Financial Statements
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Table of Contents
Financial Statements
Statement of Operations
Six months ended 2/29/24 (unaudited)
This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations.
Net investment income (loss)  
Income  
Interest $10,499,679
Expenses  
Management fee $781,291
Shareholder servicing costs 243,101
Administrative services fee 32,905
Independent Trustees' compensation 5,063
Custodian fee 8,100
Shareholder communications 7,266
Audit and tax fees 24,267
Legal fees 1,305
Miscellaneous 51,788
Total expenses $1,155,086
Fees paid indirectly (8,100)
Reduction of expenses by investment adviser (275,101)
Net expenses $871,885
Net investment income (loss) $9,627,794
Realized gain (loss) (identified cost basis)  
Unaffiliated issuers $5,933
Change in net assets from operations $9,633,727
See Notes to Financial Statements
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Table of Contents
Financial Statements
Statements of Changes in Net Assets
These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions.
  Six months ended Year ended
  2/29/24
(unaudited)
8/31/23
Change in net assets    
From operations    
Net investment income (loss) $9,627,794 $16,327,307
Net realized gain (loss) 5,933
Change in net assets from operations $9,633,727 $16,327,307
Total distributions to shareholders $(9,627,807) $(16,327,307)
Change in net assets from fund share transactions $(7,007,635) $(75,638,632)
Total change in net assets $(7,001,715) $(75,638,632)
Net assets    
At beginning of period 388,716,715 464,355,347
At end of period $381,715,000 $388,716,715
See Notes to Financial Statements
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Table of Contents
Financial Statements
Financial Highlights
The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period.
  Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $1.00 $1.00 $1.00 $1.00 $1.00 $1.00
Income (loss) from investment operations
Net investment income (loss) (d) $0.02 $0.04 $0.00(w) $0.00 $0.00(w) $0.02
Net realized and unrealized gain (loss) 0.00(w) (0.00)(w) 0.00(w) 0.01 0.00(w)
 Total from investment operations  $0.02  $0.04  $0.00(w)  $0.00(w)  $0.01  $0.02
Less distributions declared to shareholders
From net investment income $(0.02) $(0.04) $(0.00)(w) $— $(0.01) $(0.02)
From net realized gain (0.00)(w)
 Total distributions declared to shareholders  $(0.02)  $(0.04)  $(0.00)(w)  $—  $(0.01)  $(0.02)
 Net asset value, end of period  $1.00  $1.00  $1.00  $1.00  $1.00  $1.00
 Total return (%) (r)(t) 2.48(n) 3.81 0.27 0.00 0.61 1.70
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 0.59(a) 0.57 0.59 0.55 0.60 0.62
Expenses after expense reductions (f) 0.45(a) 0.45 0.23 0.06 0.36 0.61
Net investment income (loss) 4.93(a) 3.70 0.31 0.00 0.45 1.69
Net assets at end of period (000 omitted) $381,715 $388,717 $464,355 $344,209 $518,651 $303,799
    
(a) Annualized.
(d) Per share data is based on average shares outstanding.
(f) Ratios do not reflect reductions from fees paid indirectly, if applicable. See Note 2 in the Notes to Financial Statements for additional information.
(n) Not annualized.
(r) Certain expenses have been reduced without which performance would have been lower.
(t) Total returns do not include any applicable sales charges.
(w) Per share amount was less than $0.01.
See Notes to Financial Statements
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Table of Contents
Notes to Financial Statements
(unaudited) 
(1) Business and Organization
MFS U.S. Government Money Market Fund (the fund) is a diversified series of MFS Series Trust IV (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.
The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.
(2) Significant Accounting Policies
General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued.
Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.
Investment Valuations Subject to its oversight, the fund’s Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund’s adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.
Under the fund's valuation policies and procedures, market quotations are not considered to be readily available for debt instruments. Debt instruments held by the fund are generally valued at amortized cost, which approximates market value.
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Table of Contents
Notes to Financial Statements (unaudited) - continued
Amortized cost involves valuing an instrument at its cost as adjusted for amortization of premium or accretion of discount rather than its current market value. The amortized cost value of an instrument can be different from the market value of an instrument.
Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of February 29, 2024 in valuing the fund's assets and liabilities:
Financial Instruments Level 1 Level 2 Level 3 Total
Short-Term Securities $— $381,715,857 $— $381,715,857
For further information regarding security characteristics, see the Portfolio of Investments.
Repurchase Agreements — The fund enters into bilateral repurchase agreements under the terms of Master Repurchase Agreements with approved counterparties, some of which may be novated to the clearing agency, Fixed Income Clearing Corporation (FICC). Each repurchase agreement is recorded at cost. For both bilateral and cleared repurchase agreements, the fund requires that the securities collateral in a repurchase transaction be transferred to a custodian. On a daily basis, the fund monitors the collateral to ensure that its value, including accrued interest, is greater than amounts owed to the fund under each such repurchase agreement. In the event of default, the settlement of a cleared repurchase agreement is guaranteed by FICC. Upon an event of default on a bilateral repurchase agreement, the non-defaulting party may close out all transactions traded under a Master Repurchase Agreement and net amounts owed under each transaction to one net amount payable by one party to the other. Absent an event of default, the Master Repurchase Agreement does not result in an offset of reported amounts of assets and liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. At February 29, 2024, the fund had investments in repurchase agreements with a gross value of $101,361,669 included in investments in unaffiliated issuers in the Statement of Assets and Liabilities. The value of the related collateral exceeded the value of the repurchase agreements at period end.
Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.
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Table of Contents
Notes to Financial Statements (unaudited) - continued
Investment Transactions and Income —  Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles.
Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.
Fees Paid Indirectly — The fund’s custody fee may be reduced by credits earned under a previous arrangement that measured the value of U.S. dollars deposited with the custodian by the fund. The amount of the credits that were used to reduce the fund's custody fee for the six months ended February 29, 2024, is shown as a reduction of total expenses in the Statement of Operations.
Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for a three year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability.
Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.
During the year ended August 31, 2023, there were no significant adjustments due to differences between book and tax accounting.
The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows:
  Year ended
8/31/23
Ordinary income (including any short-term capital gains) $16,327,307
The federal tax cost and the tax basis components of distributable earnings were as follows:
As of 2/29/24  
Cost of investments $381,715,857
As of 8/31/23  
Undistributed ordinary income 1,148
Capital loss carryforwards (5,979)
Other temporary differences (3,659)
The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.
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Table of Contents
Notes to Financial Statements (unaudited) - continued
As of August 31, 2023, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows:
Short-Term $(5,979)
(3) Transactions with Affiliates
Investment Adviser — The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates based on the fund's average daily net assets:
Up to $1 billion 0.40%
In excess of $1 billion 0.35%
MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this management fee reduction amounted to $25,169, which is included in the reduction of total expenses in the Statement of Operations.
The management fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.39% of the fund's average daily net assets.
The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, and investment-related expenses, such that total fund operating expenses do not exceed 0.45% annually of the fund’s average daily net assets. This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this reduction amounted to $249,932, which is included in the reduction of total expenses in the Statement of Operations.
Distributor — Certain shares acquired through an exchange may be subject to a contingent deferred sales charge upon redemption depending on when the shares exchanged were originally purchased. Contingent deferred sales charges paid to MFS Distributors, Inc. (MFD) during the six months ended February 29, 2024 were $8,754.
Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 29, 2024, the fee was $122,749, which equated to 0.0628% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. For the six months ended February 29, 2024, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $120,352.
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Table of Contents
Notes to Financial Statements (unaudited) - continued
Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund.  Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services.  The fund is charged an annual fixed amount of $17,500 plus a fee based on average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.0168% of the fund's average daily net assets.
Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.
Prior to December 31, 2001, the fund had an unfunded defined benefit plan (“DB plan”) for independent Trustees.  As of December 31, 2001, the Board took action to terminate the DB plan with respect to then-current and any future independent Trustees, such that the DB plan covers only certain of those former independent Trustees who retired on or before December 31, 2001. The DB plan resulted in a pension expense of $754 and is included in “Independent Trustees’ compensation” in the Statement of Operations for the six months ended February 29, 2024. The liability for deferred retirement benefits payable to those former independent Trustees under the DB plan amounted to $606 at February 29, 2024, and is included in “Payable for independent Trustees’ compensation” in the Statement of Assets and Liabilities. The deferred retirement benefits compensation fee is accrued daily and paid monthly.
(4) Shares of Beneficial Interest
The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. The number of shares sold, reinvested and reacquired corresponds to the net proceeds from the sale of shares, reinvestment of distributions and cost of shares reacquired, respectively, since shares are sold and reacquired at $1.00 per share. Transactions in fund shares were as follows:
  Six months ended
2/29/24
  Year ended
8/31/23
Shares sold 88,648,277   224,642,194
Shares issued to shareholders in
reinvestment of distributions
9,579,768   16,262,845
Shares reacquired (105,235,678)   (316,543,671)
Net change (7,007,633)   (75,638,632)
Effective at the close of business on May 29, 2020, the fund was closed to all purchases subject to certain exceptions.
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Table of Contents
Notes to Financial Statements (unaudited) - continued
(5) Line of Credit
The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate) plus 0.10%, 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 13, 2025 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended February 29, 2024, the fund’s commitment fee and interest expense were $1,003 and $0, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.
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Table of Contents
Proxy Voting Policies and Information
MFS votes proxies on behalf of the fund pursuant to proxy voting policies and procedures that are available without charge, upon request, by calling 1-800-225-2606, by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available by August 31 of each year without charge by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Portfolio Holdings Information
The fund files monthly portfolio information with the SEC on Form N-MFP. The fund’s Form N-MFP reports are available on the SEC’s Web site at  http://www.sec.gov. A shareholder can also access the fund’s portfolio holdings as of each month end and the fund’s Form N-MFP reports at  mfs.com/openendfunds after choosing “Click here for access to Money Market fund reports”.
Further Information
From time to time, MFS may post important information about the fund or the MFS Funds on the MFS Web site (mfs.com). This information is available at https://www.mfs.com/announcements or at mfs.com/openendfunds by choosing the fund’s name and then scrolling to the “Resources” section and clicking on the “Announcements” tab, if any.
Information About Fund Contracts and Legal Claims
The fund has entered into contractual arrangements with an investment adviser, administrator, distributor, shareholder servicing agent, and custodian who each provide services to the fund. Unless expressly stated otherwise, shareholders are not parties to, or intended beneficiaries of these contractual arrangements, and these contractual arrangements are not intended to create any shareholder right to enforce them against the service providers or to seek any remedy under them against the service providers, either directly or on behalf of the fund.
Under the Trust’s By-Laws and Declaration of Trust, any claims asserted against or on behalf of the MFS Funds, including claims against Trustees and Officers, must be brought in state and federal courts located within the Commonwealth of Massachusetts.
Provision of Financial Reports and Summary Prospectuses
The fund produces financial reports every six months and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund’s annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund’s records. However, any shareholder may contact MFSC (please see back cover for address and telephone number) to request that copies of these reports and summary prospectuses be sent personally to that shareholder.
14

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CONTACT
WEB SITE
mfs.com
MFS TALK
1-800-637-8255
24 hours a day
ACCOUNT SERVICE AND LITERATURE
Shareholders
1-800-225-2606
Financial advisors
1-800-343-2829
Retirement plan services
1-800-637-1255
MAILING ADDRESS
MFS Service Center, Inc.
P.O. Box 219341
Kansas City, MO 64121-9341
OVERNIGHT MAIL
MFS Service Center, Inc.
Suite 219341
430 W 7th Street
Kansas City, MO 64105-1407

Semiannual Report
February 29, 2024
MFS®  Mid Cap Growth Fund
OTC-SEM


MFS® Mid Cap Growth Fund
CONTENTS

1

2

4

9

11

12

13

19

30

30

30

30

30
    

back cover
    
The report is prepared for the general information of shareholders. It is authorized for distribution to prospective investors only when preceded or accompanied by a current prospectus.
NOT FDIC INSURED  •  MAY LOSE VALUE  •  NO BANK GUARANTEE

Table of Contents

Table of Contents
Portfolio Composition
Portfolio structure
Top ten holdings
Monolithic Power Systems, Inc. 3.6%
Cadence Design Systems, Inc. 3.1%
Vulcan Materials Co. 2.6%
AMETEK, Inc. 2.6%
Howmet Aerospace, Inc. 2.4%
MSCI, Inc. 2.3%
Verisk Analytics, Inc., “A” 2.3%
Synopsys, Inc. 2.2%
Copart, Inc. 2.2%
Gartner, Inc. 2.2%
GICS equity sectors (g)
Information Technology 24.7%
Industrials 22.7%
Health Care 17.0%
Consumer Discretionary 12.6%
Financials 9.4%
Communication Services 4.7%
Materials 3.1%
Real Estate 2.2%
Consumer Staples 1.4%
Energy 1.3%
Equity Warrants (o) 0.0%
 
(g) The Global Industry Classification Standard (GICS®) was developed by and/or is the exclusive property of MSCI, Inc. and S&P Global Market Intelligence Inc. (“S&P Global Market Intelligence”). GICS is a service mark of MSCI and S&P Global Market Intelligence and has been licensed for use by MFS. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.
(o) Less than 0.1%.
Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities. Please see the Statement of Assets and Liabilities for additional information related to the fund’s cash position and other assets and liabilities.
Other includes equivalent exposure from currency derivatives and/or any offsets to derivative positions and may be negative.
Percentages are based on net assets as of February 29, 2024.
The portfolio is actively managed and current holdings may be different.
1

Table of Contents
Expense Table
Fund expenses borne by the shareholders during the period,
September 1, 2023 through February 29, 2024
As a shareholder of the fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on certain purchase or redemption payments, and (2) ongoing costs, including management fees; distribution and service (12b-1) fees; and other fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds.
The example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period September 1, 2023 through February 29, 2024.
Actual Expenses
The first line for each share class in the following table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.
Hypothetical Example for Comparison Purposes
The second line for each share class in the following table provides information about hypothetical account values and hypothetical expenses based on the fund’s actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the fund’s actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.
Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs, such as sales charges (loads). Therefore, the second line for each share class in the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.
2

Table of Contents
Expense Table - continued
Share
Class
  Annualized
Expense
Ratio
Beginning
Account Value
9/01/23
Ending
Account Value
2/29/24
Expenses
Paid During
Period (p)
9/01/23-2/29/24
A Actual 1.02% $1,000.00 $1,161.81 $5.48
Hypothetical (h) 1.02% $1,000.00 $1,019.79 $5.12
B Actual 1.78% $1,000.00 $1,157.03 $9.55
Hypothetical (h) 1.78% $1,000.00 $1,016.01 $8.92
C Actual 1.78% $1,000.00 $1,157.23 $9.55
Hypothetical (h) 1.78% $1,000.00 $1,016.01 $8.92
I Actual 0.77% $1,000.00 $1,163.02 $4.14
Hypothetical (h) 0.77% $1,000.00 $1,021.03 $3.87
R1 Actual 1.78% $1,000.00 $1,157.41 $9.55
Hypothetical (h) 1.78% $1,000.00 $1,016.01 $8.92
R2 Actual 1.27% $1,000.00 $1,160.12 $6.82
Hypothetical (h) 1.27% $1,000.00 $1,018.55 $6.37
R3 Actual 1.02% $1,000.00 $1,161.71 $5.48
Hypothetical (h) 1.02% $1,000.00 $1,019.79 $5.12
R4 Actual 0.77% $1,000.00 $1,162.99 $4.14
Hypothetical (h) 0.77% $1,000.00 $1,021.03 $3.87
R6 Actual 0.65% $1,000.00 $1,163.62 $3.50
Hypothetical (h) 0.65% $1,000.00 $1,021.63 $3.27
(h) 5% class return per year before expenses.
(p) “Expenses Paid During Period” are equal to each class’s annualized expense ratio, as shown above, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period).  Expenses paid do not include any applicable sales charges (loads). If these transaction costs had been included, your costs would have been higher.
3

Table of Contents
Portfolio of Investments
2/29/24 (unaudited)
The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.
Issuer     Shares/Par Value ($)
Common Stocks – 99.1%
Aerospace & Defense – 3.6%  
Hexcel Corp.   1,143,922 $85,176,432
Howmet Aerospace, Inc.   5,204,330 346,348,161
TransDigm Group, Inc.   84,870 99,954,794
        $531,479,387
Automotive – 2.2%  
Copart, Inc. (a)   6,178,057 $328,363,730
Brokerage & Asset Managers – 2.0%  
Ares Management Co.   942,108 $124,951,784
LPL Financial Holdings, Inc.   564,391 151,194,705
TPG, Inc.   521,165 23,113,668
        $299,260,157
Business Services – 13.1%  
CoStar Group, Inc. (a)   3,093,258 $269,206,244
Equifax, Inc.   461,840 126,354,806
Factset Research Systems, Inc.   313,404 144,974,422
FleetCor Technologies, Inc. (a)   403,916 112,801,621
Morningstar, Inc.   734,555 219,330,777
MSCI, Inc.   603,698 338,656,467
TransUnion   1,839,550 142,804,267
Tyler Technologies, Inc. (a)   510,794 223,288,489
Verisk Analytics, Inc., “A”   1,398,413 338,276,105
        $1,915,693,198
Computer Software – 8.4%  
ANSYS, Inc. (a)   317,269 $106,021,782
Autodesk, Inc. (a)   292,584 75,536,411
Bumble, Inc., “A” (a)   930,948 10,659,354
Cadence Design Systems, Inc. (a)   1,494,252 454,820,424
Datadog, Inc., “A” (a)   1,242,278 163,309,866
Dun & Bradstreet Holdings, Inc.   3,257,759 34,336,780
PTC, Inc. (a)   279,561 51,162,458
Synopsys, Inc. (a)   572,968 328,728,931
        $1,224,576,006
Computer Software - Systems – 6.4%  
Arista Networks, Inc. (a)   441,130 $122,431,220
Constellation Software, Inc.   102,075 284,183,148
Guidewire Software, Inc. (a)   1,208,955 144,276,690
4

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Computer Software - Systems – continued  
HubSpot, Inc. (a)   251,369 $155,549,651
ServiceNow, Inc. (a)   305,354 235,531,754
        $941,972,463
Construction – 4.5%  
AZEK Co., Inc. (a)   4,085,855 $196,570,484
Martin Marietta Materials, Inc.   118,959 68,723,804
Vulcan Materials Co.   1,452,572 386,166,266
        $651,460,554
Consumer Products – 1.4%  
Church & Dwight Co., Inc.   1,744,565 $174,665,848
ODDITY Tech Ltd. (a)(l)   831,195 35,059,805
        $209,725,653
Consumer Services – 1.6%  
Bright Horizons Family Solutions, Inc. (a)   2,007,164 $230,542,857
Electrical Equipment – 5.0%  
AMETEK, Inc.   2,103,040 $378,925,747
Hubbell, Inc.   299,775 114,115,349
Littlefuse, Inc.   254,908 60,729,282
nVent Electric PLC   1,483,819 99,890,695
Rockwell Automation, Inc.   263,674 75,168,184
        $728,829,257
Electronics – 6.0%  
ASM International N.V.   527,830 $321,578,824
Entegris, Inc.   249,724 33,552,916
Monolithic Power Systems, Inc.   730,796 526,202,352
        $881,334,092
Energy - Independent – 1.3%  
Chesapeake Energy Corp.   1,317,378 $109,052,551
Diamondback Energy, Inc.   429,818 78,450,381
        $187,502,932
Engineering - Construction – 0.6%  
Quanta Services, Inc.   356,267 $86,042,043
Entertainment – 1.8%  
Spotify Technology S.A. (a)   1,014,068 $260,017,176
5

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Gaming & Lodging – 3.9%  
DraftKings, Inc. (a)   3,672,776 $159,104,656
Hyatt Hotels Corp.   1,551,655 238,318,691
Las Vegas Sands Corp.   1,230,850 67,105,942
Red Rock Resorts, Inc.   1,788,754 103,729,845
        $568,259,134
General Merchandise – 0.3%  
Five Below, Inc. (a)   197,132 $39,560,450
Insurance – 1.8%  
Arthur J. Gallagher & Co.   1,092,789 $266,564,021
Internet – 2.5%  
Gartner, Inc. (a)   701,648 $326,659,243
Match Group, Inc. (a)   1,156,215 41,669,989
        $368,329,232
Leisure & Toys – 2.3%  
Electronic Arts, Inc.   274,855 $38,336,775
Take-Two Interactive Software, Inc. (a)   2,071,743 304,401,199
        $342,737,974
Machinery & Tools – 2.7%  
Ingersoll Rand, Inc.   1,879,486 $171,653,456
Wabtec Corp.   1,551,567 219,220,902
        $390,874,358
Medical & Health Technology & Services – 4.8%  
Chemed Corp.   182,258 $114,117,202
ICON PLC (a)   750,542 240,638,776
IDEXX Laboratories, Inc. (a)   258,168 148,505,979
Veeva Systems, Inc. (a)   861,897 194,366,392
        $697,628,349
Medical Equipment – 10.2%  
Agilent Technologies, Inc.   1,619,339 $222,432,405
Bio-Techne Corp.   1,412,299 103,902,837
Bruker BioSciences Corp.   2,707,741 234,327,906
DexCom, Inc. (a)   1,626,230 187,130,286
Envista Holdings Corp. (a)   558,061 11,523,960
Masimo Corp. (a)   644,192 82,804,440
Natera, Inc. (a)   1,429,957 123,676,981
STERIS PLC   1,175,159 273,706,283
Waters Corp. (a)   189,419 63,913,759
6

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Common Stocks – continued
Medical Equipment – continued  
West Pharmaceutical Services, Inc.   544,975 $195,297,241
        $1,498,716,098
Pharmaceuticals – 2.1%  
Argenx SE, ADR (a)   104,756 $39,808,328
Ascendis Pharma, ADR (a)(h)   1,169,326 172,779,610
Legend Biotech Corp., ADR (a)   1,339,933 87,310,034
        $299,897,972
Pollution Control – 0.9%  
GFL Environmental, Inc.   3,452,542 $124,567,715
Printing & Publishing – 2.3%  
Warner Music Group Corp.   1,048,913 $36,638,531
Wolters Kluwer N.V.   1,946,395 306,819,354
        $343,457,885
Restaurants – 2.2%  
Chipotle Mexican Grill, Inc., “A” (a)   68,991 $185,500,931
Wingstop, Inc.   408,405 143,370,575
        $328,871,506
Specialty Stores – 4.6%  
Lululemon Athletica, Inc. (a)   318,720 $148,870,925
O'Reilly Automotive, Inc. (a)   210,978 229,421,697
Tractor Supply Co.   417,880 106,275,242
Ulta Beauty, Inc. (a)   344,949 189,225,223
        $673,793,087
Telecommunications - Wireless – 0.3%  
SBA Communications Corp., REIT   228,193 $47,744,821
Trucking – 0.3%  
Saia, Inc. (a)   77,612 $44,657,945
Total Common Stocks (Identified Cost, $8,765,801,575)   $14,512,460,052
    
  Strike
Price
First
Exercise
   
Warrants – 0.0%        
Computer Software - Systems – 0.0%
Constellation Software, Inc. (CAD 100 principal amount of Series 2 Debentures for 1 warrant, Expiration 3/31/2040) (a)(Identified Cost, $0) CAD 11.5 N/A 115,391 $0
    
7

Table of Contents
Portfolio of Investments (unaudited) – continued
Issuer     Shares/Par Value ($)
Investment Companies (h) – 0.7%
Money Market Funds – 0.7%  
MFS Institutional Money Market Portfolio, 5.37% (v) (Identified Cost, $104,380,272)     104,380,747 $104,380,746
Collateral for Securities Loaned – 0.2%
JPMorgan U.S. Government Money Market Fund - Class IM Shares, 5.25% (j) (Identified Cost, $27,517,600)     27,517,600 $27,517,600
Other Assets, Less Liabilities – 0.0%   6,736,400
Net Assets – 100.0% $14,651,094,798
    
(a) Non-income producing security.      
(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $277,160,356 and $14,367,198,042, respectively.      
(j) The rate quoted is the annualized seven-day yield of the fund at period end.      
(l) A portion of this security is on loan. See Note 2 for additional information.      
(v) Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.      
    
The following abbreviations are used in this report and are defined:
ADR American Depositary Receipt
REIT Real Estate Investment Trust
Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise indicated. A list of abbreviations is shown below:
CAD Canadian Dollar
See Notes to Financial Statements
8

Table of Contents
Financial Statements
Statement of Assets and Liabilities
At 2/29/24 (unaudited)
This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund.
Assets  
Investments in unaffiliated issuers, at value, including $27,636,673 of securities on loan (identified cost, $8,655,802,581) $14,367,198,042
Investments in affiliated issuers, at value (identified cost, $241,896,866) 277,160,356
Receivables for  
Investments sold 158,153,360
Fund shares sold 19,780,426
Interest and dividends 6,370,561
Other assets 78,582
Total assets $14,828,741,327
Liabilities  
Payables for  
Investments purchased $133,726,293
Fund shares reacquired 13,259,967
Collateral for securities loaned, at value 27,517,600
Payable to affiliates  
Investment adviser 495,095
Administrative services fee 3,368
Shareholder servicing costs 2,251,593
Distribution and service fees 38,662
Payable for independent Trustees' compensation 18,879
Accrued expenses and other liabilities 335,072
Total liabilities $177,646,529
Net assets $14,651,094,798
Net assets consist of  
Paid-in capital $8,875,376,824
Total distributable earnings (loss) 5,775,717,974
Net assets $14,651,094,798
Shares of beneficial interest outstanding 471,516,816
9

Table of Contents
Statement of Assets and Liabilities (unaudited) – continued
  Net assets Shares
outstanding
Net asset value
per share (a)
Class A $1,771,311,662 60,917,716 $29.08
Class B 7,365,364 325,590 22.62
Class C 82,726,840 3,783,779 21.86
Class I 3,888,751,344 123,881,102 31.39
Class R1 3,128,194 139,023 22.50
Class R2 26,380,844 981,342 26.88
Class R3 662,795,829 22,949,312 28.88
Class R4 276,669,102 9,037,491 30.61
Class R6 7,931,965,619 249,501,461 31.79
    
(a) Maximum offering price per share was equal to the net asset value per share for all share classes, except for Class A, for which the maximum offering price per share was $30.85 [100 / 94.25 x $29.08]. On sales of $50,000 or more, the maximum offering price of Class A shares is reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. Redemption price per share was equal to the net asset value per share for Classes I, R1, R2, R3, R4, and R6.
See Notes to Financial Statements
10

Table of Contents
Financial Statements
Statement of Operations
Six months ended 2/29/24 (unaudited)
This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations.
Net investment income (loss)  
Income  
Dividends $32,241,631
Dividends from affiliated issuers 8,742,028
Income on securities loaned 397,599
Other 106,595
Foreign taxes withheld (60,677)
Total investment income $41,427,176
Expenses  
Management fee $41,716,186
Distribution and service fees 3,177,698
Shareholder servicing costs 4,010,066
Administrative services fee 305,852
Independent Trustees' compensation 63,340
Custodian fee 219,817
Shareholder communications 388,996
Audit and tax fees 34,447
Legal fees 33,977
Miscellaneous 225,923
Total expenses $50,176,302
Fees paid indirectly (3,232)
Reduction of expenses by investment adviser and distributor (841,352)
Net expenses $49,331,718
Net investment income (loss) $(7,904,542)
Realized and unrealized gain (loss)
Realized gain (loss) (identified cost basis)  
Unaffiliated issuers $344,130,211
Affiliated issuers 18,022
Foreign currency (33,432)
Net realized gain (loss) $344,114,801
Change in unrealized appreciation or depreciation  
Unaffiliated issuers $1,664,281,817
Affiliated issuers 60,242,061
Translation of assets and liabilities in foreign currencies 11,680
Net unrealized gain (loss) $1,724,535,558
Net realized and unrealized gain (loss) $2,068,650,359
Change in net assets from operations $2,060,745,817
See Notes to Financial Statements
11

Table of Contents
Financial Statements
Statements of Changes in Net Assets
These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions.
  Six months ended Year ended
  2/29/24
(unaudited)
8/31/23
Change in net assets    
From operations    
Net investment income (loss) $(7,904,542) $3,667,814
Net realized gain (loss) 344,114,801 (225,145,025)
Net unrealized gain (loss) 1,724,535,558 1,583,140,947
Change in net assets from operations $2,060,745,817 $1,361,663,736
Change in net assets from fund share transactions $(483,955,811) $(1,488,530,966)
Total change in net assets $1,576,790,006 $(126,867,230)
Net assets    
At beginning of period 13,074,304,792 13,201,172,022
At end of period $14,651,094,798 $13,074,304,792
See Notes to Financial Statements
12

Table of Contents
Financial Statements
Financial Highlights
The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years. Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund share class (assuming reinvestment of all distributions) held for the entire period.
Class A Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $25.03 $22.55 $31.84 $24.65 $20.19 $19.16
Income (loss) from investment operations
Net investment income (loss) (d) $(0.05) $(0.06) $(0.15) $(0.18) $(0.07) $(0.07)
Net realized and unrealized gain (loss) 4.10 2.54 (8.02) 7.60 4.71 1.83
 Total from investment operations  $4.05  $2.48  $(8.17)  $7.42  $4.64  $1.76
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $29.08  $25.03  $22.55  $31.84  $24.65  $20.19
 Total return (%) (r)(s)(t)(x) 16.18(n) 11.00 (26.53) 30.30 23.16 10.13
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 1.04(a) 1.04 1.03 1.01 1.05 1.10
Expenses after expense reductions (f) 1.02(a) 1.03 1.01 1.00 1.04 1.09
Net investment income (loss) (0.39)(a) (0.24) (0.54) (0.65) (0.35) (0.36)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $1,771,312 $1,560,931 $1,477,097 $2,130,372 $1,483,320 $1,065,566
See Notes to Financial Statements
13

Table of Contents
Financial Highlights – continued
Class B Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $19.55 $17.75 $25.48 $19.91 $16.47 $15.90
Income (loss) from investment operations
Net investment income (loss) (d) $(0.11) $(0.18) $(0.28) $(0.31) $(0.19) $(0.17)
Net realized and unrealized gain (loss) 3.18 1.98(g) (6.33)(g) 6.11 3.81 1.47
 Total from investment operations  $3.07  $1.80  $(6.61)  $5.80  $3.62  $1.30
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $22.62  $19.55  $17.75  $25.48  $19.91  $16.47
 Total return (%) (r)(s)(t)(x) 15.70(n) 10.14 (27.05) 29.36 22.20 9.28
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 1.79(a) 1.79 1.78 1.76 1.80 1.85
Expenses after expense reductions (f) 1.78(a) 1.78 1.76 1.75 1.79 1.84
Net investment income (loss) (1.14)(a) (0.99) (1.30) (1.39) (1.10) (1.12)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $7,365 $8,033 $10,002 $18,021 $17,725 $18,581
    
Class C Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $18.89 $17.15 $24.66 $19.28 $15.95 $15.42
Income (loss) from investment operations
Net investment income (loss) (d) $(0.11) $(0.17) $(0.27) $(0.30) $(0.18) $(0.16)
Net realized and unrealized gain (loss) 3.08 1.91(g) (6.12)(g) 5.91(g) 3.69 1.42
 Total from investment operations  $2.97  $1.74  $(6.39)  $5.61  $3.51  $1.26
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $21.86  $18.89  $17.15  $24.66  $19.28  $15.95
 Total return (%) (r)(s)(t)(x) 15.72(n) 10.15 (27.06) 29.34 22.23 9.31
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 1.79(a) 1.79 1.78 1.76 1.80 1.85
Expenses after expense reductions (f) 1.78(a) 1.78 1.76 1.75 1.79 1.84
Net investment income (loss) (1.14)(a) (0.99) (1.30) (1.40) (1.10) (1.11)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $82,727 $76,216 $85,842 $137,007 $109,521 $78,858
See Notes to Financial Statements
14

Table of Contents
Financial Highlights – continued
Class I Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $26.99 $24.26 $34.07 $26.30 $21.48 $20.28
Income (loss) from investment operations
Net investment income (loss) (d) $(0.02) $0.00(w) $(0.08) $(0.12) $(0.02) $(0.02)
Net realized and unrealized gain (loss) 4.42 2.73 (8.61) 8.12 5.02 1.95
 Total from investment operations  $4.40  $2.73  $(8.69)  $8.00  $5.00  $1.93
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $31.39  $26.99  $24.26  $34.07  $26.30  $21.48
 Total return (%) (r)(s)(t)(x) 16.30(n) 11.25 (26.32) 30.60 23.45 10.42
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 0.79(a) 0.79 0.78 0.76 0.80 0.84
Expenses after expense reductions (f) 0.77(a) 0.78 0.77 0.75 0.79 0.83
Net investment income (loss) (0.14)(a) 0.01 (0.28) (0.40) (0.10) (0.09)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $3,888,751 $3,541,201 $4,344,475 $4,444,325 $3,837,781 $1,330,368
See Notes to Financial Statements
15

Table of Contents
Financial Highlights – continued
Class R1 Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $19.44 $17.65 $25.35 $19.81 $16.39 $15.82
Income (loss) from investment operations
Net investment income (loss) (d) $(0.11) $(0.18) $(0.28) $(0.31) $(0.18) $(0.17)
Net realized and unrealized gain (loss) 3.17 1.97(g) (6.30)(g) 6.08 3.78 1.47
 Total from investment operations  $3.06  $1.79  $(6.58)  $5.77  $3.60  $1.30
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $22.50  $19.44  $17.65  $25.35  $19.81  $16.39
 Total return (%) (r)(s)(t)(x) 15.74(n) 10.14 (27.07) 29.36 22.18 9.33
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 1.79(a) 1.79 1.78 1.76 1.80 1.85
Expenses after expense reductions (f) 1.78(a) 1.78 1.76 1.75 1.79 1.84
Net investment income (loss) (1.14)(a) (0.99) (1.30) (1.39) (1.09) (1.12)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $3,128 $3,097 $3,040 $5,281 $4,187 $3,472
    
Class R2 Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $23.17 $20.93 $29.70 $23.06 $18.95 $18.08
Income (loss) from investment operations
Net investment income (loss) (d) $(0.08) $(0.10) $(0.20) $(0.24) $(0.12) $(0.11)
Net realized and unrealized gain (loss) 3.79 2.34 (7.45) 7.11 4.41 1.71
 Total from investment operations  $3.71  $2.24  $(7.65)  $6.87  $4.29  $1.60
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $26.88  $23.17  $20.93  $29.70  $23.06  $18.95
 Total return (%) (r)(s)(t)(x) 16.01(n) 10.70 (26.70) 30.00 22.83 9.84
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 1.29(a) 1.29 1.28 1.26 1.30 1.35
Expenses after expense reductions (f) 1.27(a) 1.28 1.27 1.25 1.29 1.34
Net investment income (loss) (0.64)(a) (0.49) (0.79) (0.90) (0.60) (0.61)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $26,381 $23,393 $21,633 $29,120 $15,176 $11,060
See Notes to Financial Statements
16

Table of Contents
Financial Highlights – continued
Class R3 Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $24.86 $22.40 $31.63 $24.49 $20.06 $19.04
Income (loss) from investment operations
Net investment income (loss) (d) $(0.05) $(0.05) $(0.14) $(0.18) $(0.07) $(0.06)
Net realized and unrealized gain (loss) 4.07 2.51 (7.97) 7.55 4.68 1.81
 Total from investment operations  $4.02  $2.46  $(8.11)  $7.37  $4.61  $1.75
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $28.88  $24.86  $22.40  $31.63  $24.49  $20.06
 Total return (%) (r)(s)(t)(x) 16.17(n) 10.98 (26.52) 30.29 23.16 10.14
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 1.04(a) 1.04 1.03 1.01 1.05 1.09
Expenses after expense reductions (f) 1.02(a) 1.03 1.01 1.00 1.04 1.09
Net investment income (loss) (0.39)(a) (0.24) (0.54) (0.65) (0.35) (0.34)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $662,796 $592,712 $557,897 $777,474 $451,972 $239,505
    
Class R4 Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $26.32 $23.66 $33.25 $25.67 $20.97 $19.82
Income (loss) from investment operations
Net investment income (loss) (d) $(0.02) $0.00(w) $(0.08) $(0.12) $(0.02) $(0.02)
Net realized and unrealized gain (loss) 4.31 2.66 (8.39) 7.93 4.90 1.90
 Total from investment operations  $4.29  $2.66  $(8.47)  $7.81  $4.88  $1.88
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $30.61  $26.32  $23.66  $33.25  $25.67  $20.97
 Total return (%) (r)(s)(t)(x) 16.30(n) 11.24 (26.30) 30.61 23.45 10.40
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 0.79(a) 0.79 0.78 0.76 0.80 0.84
Expenses after expense reductions (f) 0.77(a) 0.78 0.76 0.75 0.79 0.83
Net investment income (loss) (0.14)(a) 0.01 (0.29) (0.40) (0.10) (0.08)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $276,669 $268,875 $300,198 $389,323 $242,937 $173,441
See Notes to Financial Statements
17

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Financial Highlights – continued
Class R6 Six months
ended
Year ended
  2/29/24
(unaudited)
8/31/23 8/31/22 8/31/21 8/31/20 8/31/19
Net asset value, beginning of period $27.32 $24.52 $34.39 $26.51 $21.63 $20.40
Income (loss) from investment operations
Net investment income (loss) (d) $(0.00)(w) $0.04 $(0.05) $(0.09) $(0.00)(w) $(0.00)(w)
Net realized and unrealized gain (loss) 4.47 2.76 (8.70) 8.20 5.06 1.96
 Total from investment operations  $4.47  $2.80  $(8.75)  $8.11  $5.06  $1.96
Less distributions declared to shareholders
From net realized gain $— $— $(1.12) $(0.23) $(0.18) $(0.73)
 Net asset value, end of period (x)  $31.79  $27.32  $24.52  $34.39  $26.51  $21.63
 Total return (%) (r)(s)(t)(x) 16.36(n) 11.42 (26.24) 30.78 23.57 10.51
Ratios (%) (to average net assets)
and Supplemental data:
Expenses before expense reductions (f) 0.66(a) 0.67 0.66 0.66 0.70 0.75
Expenses after expense reductions (f) 0.65(a) 0.65 0.65 0.65 0.69 0.74
Net investment income (loss) (0.02)(a) 0.14 (0.18) (0.30) (0.01) (0.01)
Portfolio turnover 17(n) 30 21 23 34 21
Net assets at end of period (000 omitted) $7,931,966 $6,999,847 $6,400,990 $8,056,150 $5,343,295 $3,053,325
    
(a) Annualized.
(d) Per share data is based on average shares outstanding.
(f) Ratios do not reflect reductions from fees paid indirectly, if applicable. See Note 2 in the Notes to Financial Statements for additional information.
(g) The per share amount varies from the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the per share amount of realized and unrealized gains and losses at such time.
(n) Not annualized.
(r) Certain expenses have been reduced without which performance would have been lower.
(s) From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.
(t) Total returns do not include any applicable sales charges.
(w) Per share amount was less than $0.01.
(x) The net asset values and total returns have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted accounting principles required at period end for financial reporting purposes.
See Notes to Financial Statements
18

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Notes to Financial Statements
(unaudited) 
(1) Business and Organization
MFS Mid Cap Growth Fund (the fund) is a diversified series of MFS Series Trust IV (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.
The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.
(2) Significant Accounting Policies
General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued.
Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.
Investment Valuations Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.
Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a
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Notes to Financial Statements (unaudited) - continued
third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value.
Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.
Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.
Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant
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Notes to Financial Statements (unaudited) - continued
unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of February 29, 2024 in valuing the fund's assets and liabilities:
Financial Instruments Level 1 Level 2 Level 3 Total
Equity Securities:        
United States $13,140,353,234 $— $— $13,140,353,234
Netherlands 628,398,178 628,398,178
Canada 408,750,863 0 408,750,863
Denmark 172,779,610 172,779,610
China 87,310,034 87,310,034
Belgium 39,808,328 39,808,328
Israel 35,059,805 35,059,805
Mutual Funds 131,898,346 131,898,346
Total $14,644,358,398 $0 $— $14,644,358,398
For further information regarding security characteristics, see the Portfolio of Investments.
Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.
Security Loans — Under its Securities Lending Agency Agreement with the fund, JPMorgan Chase and Co., as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund. Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within three business days. The loans are collateralized by cash and/or U.S. Treasury and federal agency obligations in an amount typically at least equal to the market value of the securities loaned. On loans collateralized by cash, the cash collateral is invested in a money market fund. The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day. The lending agent provides the fund with indemnification against Borrower default. In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or, when such purchase is commercially impracticable, pay the fund the market value of the loaned securities. In return, the lending agent assumes the fund's rights to the related collateral. If the collateral value is less than the cost to purchase identical securities, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. At period end, the fund had investment securities on loan, all of which were classified as equity securities
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Notes to Financial Statements (unaudited) - continued
in the fund's Portfolio of Investments, with a fair value of $27,636,673. The fair value of the fund's investment securities on loan and a related liability of $27,517,600 for cash collateral received on securities loaned are both presented gross in the Statement of Assets and Liabilities. The value of the fund's securities on loan is marked to market daily and daily market fluctuations could cause the value of loaned securities to be more or less than the value of the collateral received. The value of the fund's securities on loan net of the related collateral is $119,073 at period end. This collateral shortfall was adjusted for the following business day. The liability for cash collateral for securities loaned is carried at fair value, which is categorized as level 2 within the fair value hierarchy. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. Treasury and/or federal agency obligations, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is separately reported in the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income.
Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.
Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.
The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.
Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.
Fees Paid Indirectly — The fund's custody fee may be reduced by a credit earned under an arrangement that measures the value of U.S. dollars deposited with the custodian by the fund. The amount of the credit, for the six months ended February 29, 2024, is shown as a reduction of total expenses in the Statement of Operations.
Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for a three year period. Management has analyzed the fund’s tax positions taken on federal and
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Notes to Financial Statements (unaudited) - continued
state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.
Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.
Book/tax differences primarily relate to net operating losses, wash sale loss deferrals, and redemptions in-kind.
The federal tax cost and the tax basis components of distributable earnings were as follows:
As of 2/29/24  
Cost of investments $8,914,345,597
Gross appreciation 5,853,039,349
Gross depreciation (123,026,548)
Net unrealized appreciation (depreciation) $5,730,012,801
As of 8/31/23  
Capital loss carryforwards (262,818,736)
Late year ordinary loss deferral (176,108)
Other temporary differences (12,227)
Net unrealized appreciation (depreciation) 3,977,979,228
The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.
As of August 31, 2023, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows:
Short-Term $(262,818,736)
Multiple Classes of Shares of Beneficial Interest — The fund offers multiple classes of shares, which differ in their respective distribution and service fees. The fund's income, realized and unrealized gain (loss), and common expenses are allocated to shareholders based on the daily net assets of each class. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class C shares will convert to Class A shares approximately eight years after purchase.
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Notes to Financial Statements (unaudited) - continued
(3) Transactions with Affiliates
Investment Adviser — The fund has an investment advisory agreement with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at the following annual rates based on the fund's average daily net assets:
Up to $1 billion 0.75%
In excess of $1 billion and up to $2.5 billion 0.70%
In excess of $2.5 billion and up to $5 billion 0.65%
In excess of $5 billion and up to $10 billion 0.62%
In excess of $10 billion and up to $20 billion 0.60%
In excess of $20 billion 0.55%
MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, this management fee reduction amounted to $841,233, which is included in the reduction of total expenses in the Statement of Operations.
The management fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.63% of the fund's average daily net assets.
The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses, such that total fund operating expenses do not exceed the following rates annually of each class’s average daily net assets:
Classes
A B C I R1 R2 R3 R4 R6
1.30% 2.05% 2.05% 1.05% 2.05% 1.55% 1.30% 1.05% 0.95%
This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until December 31, 2024. For the six months ended February 29, 2024, the fund’s actual operating expenses did not exceed the limit and therefore, the investment adviser did not pay any portion of the fund’s expenses related to this agreement.
Distributor — MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $98,836 for the six months ended February 29, 2024, as its portion of the initial sales charge on sales of Class A shares of the fund.
The Board of Trustees has adopted a distribution plan for certain share classes pursuant to Rule 12b-1 of the Investment Company Act of 1940.
The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and
24

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Notes to Financial Statements (unaudited) - continued
another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. The distribution and service fees are computed daily and paid monthly.
Distribution Plan Fee Table:
  Distribution
Fee Rate (d)
Service
Fee Rate (d)
Total
Distribution
Plan (d)
Annual
Effective
Rate (e)
Distribution
and Service
Fee
Class A 0.25% 0.25% 0.25% $ 1,959,941
Class B 0.75% 0.25% 1.00% 1.00% 36,326
Class C 0.75% 0.25% 1.00% 1.00% 375,544
Class R1 0.75% 0.25% 1.00% 1.00% 14,605
Class R2 0.25% 0.25% 0.50% 0.50% 57,549
Class R3 0.25% 0.25% 0.25% 733,733
Total Distribution and Service Fees         $3,177,698
(d) In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees equal to these annual percentage rates of each class’s average daily net assets. The distribution and service fee rates disclosed by class represent the current rates in effect at the end of the reporting period. Any rate changes, if applicable, are detailed below.
(e) The annual effective rates represent actual fees incurred under the distribution plan for the six months ended February 29, 2024 based on each class's average daily net assets. MFD has voluntarily agreed to rebate a portion of each class's 0.25% service fee attributable to accounts for which there is no financial intermediary specified on the account except for accounts attributable to MFS or its affiliates' seed money. For the six months ended February 29, 2024, this rebate amounted to $119 for Class A shares and is included in the reduction of total expenses in the Statement of Operations.
Certain Class A shares are subject to a contingent deferred sales charge (CDSC) in the event of a shareholder redemption within 18 months of purchase. Class B shares are subject to a CDSC in the event of a shareholder redemption within six years of purchase. Class C shares are subject to a CDSC in the event of a shareholder redemption within 12 months of purchase.  All contingent deferred sales charges are paid to MFD and during the six months ended February 29, 2024, were as follows:
  Amount
Class A $7,950
Class B 1,407
Class C 2,641
Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended February 29, 2024, the fee was $208,916, which equated to 0.0032% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. Class R6 shares do not incur sub-accounting fees. For the six months ended February 29, 2024, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $3,801,150.
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Notes to Financial Statements (unaudited) - continued
Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund.  Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services.  The fund is charged an annual fixed amount of $17,500 plus a fee based on average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended February 29, 2024 was equivalent to an annual effective rate of 0.0047% of the fund's average daily net assets.
Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.
Other — The fund invests in the MFS Institutional Money Market Portfolio which is managed by MFS and seeks current income consistent with preservation of capital and liquidity. This money market fund does not pay a management fee to MFS but does incur investment and operating costs.
The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended February 29, 2024, this reimbursement amounted to $106,595, which is included in “Other” income in the Statement of Operations.
(4) Portfolio Securities
For the six months ended February 29, 2024, purchases and sales of investments, other than short-term obligations, aggregated $2,173,623,831 and $2,402,273,606, respectively.
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Notes to Financial Statements (unaudited) - continued
(5) Shares of Beneficial Interest
The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows:
  Six months ended
2/29/24
  Year ended
8/31/23
  Shares Amount   Shares Amount
Shares sold          
Class A 3,489,384 $90,192,930   6,793,284 $157,786,486
Class B 615 11,949   4,974 93,494
Class C 226,146 4,386,558   339,404 5,947,419
Class I 11,389,820 317,928,241   32,405,384 802,020,268
Class R1 9,041 180,623   28,035 508,425
Class R2 104,765 2,504,889   200,572 4,328,218
Class R3 1,656,723 42,779,730   3,483,597 79,637,903
Class R4 451,563 12,202,947   1,244,875 30,125,069
Class R6 21,800,776 609,029,481   47,356,728 1,192,536,320
  39,128,833 $1,079,217,348   91,856,853 $2,272,983,602
Shares reacquired          
Class A (4,933,177) $(126,948,621)   (9,923,273) $(229,185,981)
Class B (86,031) (1,698,490)   (157,611) (2,852,374)
Class C (476,857) (9,248,559)   (1,310,183) (22,895,214)
Class I (18,719,372) (509,735,301)   (80,289,596) (1,995,690,788)
Class R1 (29,310) (577,768)   (40,959) (738,986)
Class R2 (133,037) (3,075,527)   (224,530) (4,795,328)
Class R3 (2,548,011) (64,236,024)   (4,547,088) (105,133,340)
Class R4 (1,629,764) (42,045,152)   (3,718,861) (87,895,279)
Class R6 (28,554,071) (805,607,717)   (52,147,027) (1,312,327,278)
  (57,109,630) $(1,563,173,159)   (152,359,128) $(3,761,514,568)
Net change          
Class A (1,443,793) $(36,755,691)   (3,129,989) $(71,399,495)
Class B (85,416) (1,686,541)   (152,637) (2,758,880)
Class C (250,711) (4,862,001)   (970,779) (16,947,795)
Class I (7,329,552) (191,807,060)   (47,884,212) (1,193,670,520)
Class R1 (20,269) (397,145)   (12,924) (230,561)
Class R2 (28,272) (570,638)   (23,958) (467,110)
Class R3 (891,288) (21,456,294)   (1,063,491) (25,495,437)
Class R4 (1,178,201) (29,842,205)   (2,473,986) (57,770,210)
Class R6 (6,753,295) (196,578,236)   (4,790,299) (119,790,958)
  (17,980,797) $(483,955,811)   (60,502,275) $(1,488,530,966)
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Notes to Financial Statements (unaudited) - continued
The fund is one of several mutual funds in which certain MFS funds may invest. The MFS funds do not invest in the underlying funds for the purpose of exercising management or control. At the end of the period, the MFS Growth Allocation Fund, the MFS Moderate Allocation Fund, the MFS Aggressive Growth Allocation Fund, and the MFS Conservative Allocation Fund were the owners of record of approximately 4%, 3%, 2%, and 1%, respectively, of the value of outstanding voting shares of the fund. In addition, the MFS Lifetime Income Fund, the MFS Lifetime 2025 Fund, the MFS Lifetime 2030 Fund, the MFS Lifetime 2035 Fund, the MFS Lifetime 2040 Fund, the MFS Lifetime 2045 Fund, the MFS Lifetime 2050 Fund, the MFS Lifetime 2055 Fund, the MFS Lifetime 2060 Fund, and the MFS Lifetime 2065 Fund were each the owners of record of less than 1% of the value of outstanding voting shares of the fund.
Effective June 1, 2019, purchases of the fund’s Class B shares were closed to new and existing investors subject to certain exceptions. Effective September 29, 2023, purchases of the fund's Class R1 and Class R2 shares were closed to new eligible investors.
(6) Line of Credit
The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate) plus 0.10%, 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 13, 2025 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended February 29, 2024, the fund’s commitment fee and interest expense were $32,048 and $0, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.
(7) Investments in Affiliated Issuers
An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the following were affiliated issuers:
Affiliated Issuers Beginning
Value
Purchases Sales
Proceeds
Realized
Gain
(Loss)
Change in
Unrealized
Appreciation or
Depreciation
Ending
Value
Ascendis Pharma, ADR  $88,520,882  $24,590,007  $607,534  $(7,643)  $60,283,898  $172,779,610
MFS Institutional Money Market Portfolio  419,936,182  441,453,137  756,992,401  25,665  (41,837)  104,380,746
  $508,457,064 $466,043,144 $757,599,935 $18,022 $60,242,061 $277,160,356
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Notes to Financial Statements (unaudited) - continued
Affiliated Issuers Dividend
Income
Capital Gain
Distributions
Ascendis Pharma, ADR  $—  $—
MFS Institutional Money Market Portfolio  8,742,028  —
  $8,742,028 $—
(8) Subsequent Event
On April 5, 2024, the fund recorded redemption proceeds for a distribution in-kind of portfolio securities and cash that were valued at $192,072,468.  The redeeming shareholder generally receives a pro rata share of the securities held by the fund.  The distribution of such securities generated a realized gain of $99,675,662 for the fund.
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Proxy Voting Policies and Information
MFS votes proxies on behalf of the fund pursuant to proxy voting policies and procedures that are available without charge, upon request, by calling 1-800-225-2606, by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Information regarding how the fund voted proxies relating to portfolio securities during the most recent twelve-month period ended June 30 is available by August 31 of each year without charge by visiting mfs.com/proxyvoting, or by visiting the SEC’s Web site at http://www.sec.gov.
Quarterly Portfolio Disclosure
The fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. The fund's Form N-PORT reports are available on the SEC's Web site at  http://www.sec.gov. A shareholder can obtain the portfolio holdings report for the first and third quarters of the fund's fiscal year at mfs.com/openendfunds by choosing the fund's name and then scrolling to the “Resources” section and clicking on the “Prospectus and Reports” tab.
Further Information
From time to time, MFS may post important information about the fund or the MFS Funds on the MFS Web site (mfs.com). This information is available at https://www.mfs.com/announcements or at mfs.com/openendfunds by choosing the fund’s name and then scrolling to the “Resources” section and clicking on the “Announcements” tab, if any.
Information About Fund Contracts and Legal Claims
The fund has entered into contractual arrangements with an investment adviser, administrator, distributor, shareholder servicing agent, and custodian who each provide services to the fund. Unless expressly stated otherwise, shareholders are not parties to, or intended beneficiaries of these contractual arrangements, and these contractual arrangements are not intended to create any shareholder right to enforce them against the service providers or to seek any remedy under them against the service providers, either directly or on behalf of the fund.
Under the Trust’s By-Laws and Declaration of Trust, any claims asserted against or on behalf of the MFS Funds, including claims against Trustees and Officers, must be brought in state and federal courts located within the Commonwealth of Massachusetts.
Provision of Financial Reports and Summary Prospectuses
The fund produces financial reports every six months and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund’s annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund’s records. However, any shareholder may contact MFSC (please see back cover for address and telephone number) to request that copies of these reports and summary prospectuses be sent personally to that shareholder.
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CONTACT
WEB SITE
mfs.com
MFS TALK
1-800-637-8255
24 hours a day
ACCOUNT SERVICE AND LITERATURE
Shareholders
1-800-225-2606
Financial advisors
1-800-343-2829
Retirement plan services
1-800-637-1255
MAILING ADDRESS
MFS Service Center, Inc.
P.O. Box 219341
Kansas City, MO 64121-9341
OVERNIGHT MAIL
MFS Service Center, Inc.
Suite 219341
430 W 7th Street
Kansas City, MO 64105-1407

Item 1(b):

Not applicable.

ITEM 2. CODE OF ETHICS.

The Registrant has adopted a Code of Ethics (the "Code") pursuant to Section 406 of the Sarbanes-Oxley Act and as defined in Form N-CSR that applies to the Registrant's principal executive officer and principal financial and accounting officer. During the period covered by this report, the Registrant has not amended any provision in the Code that relates to an element of the Code's definition enumerated in paragraph

(b)of Item 2 of this Form N-CSR. During the period covered by this report, the Registrant did not grant a waiver, including an implicit

waiver, from any provision of the Code. David L. DiLorenzo (Principal Executive Officer) and James O. Yost (Principal Financial Officer) were the two persons covered by the Code prior to April 1, 2024. Beginning April 1, 2024, David L. DiLorenzo (Principal Executive Officer) and Kasey L. Phillips (Principal Financial Officer) are the two persons covered by the Code.

A copy of the Code is attached hereto as EX-99.COE.

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

Not applicable for semi-annual reports.

ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

Not applicable for semi-annual reports.

 

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable to the Registrant.

ITEM 6. INVESTMENTS

A schedule of investments for each series covered by this Form N-CSR is included as part of the report to shareholders of such series under Item 1(a) of this Form N-CSR.

ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable to the Registrant.

ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable to the Registrant.

ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

Not applicable to the Registrant.

ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

There were no material changes to the procedures by which shareholders may send recommendations to the Board for nominees to the Registrant's Board since the Registrant last provided disclosure as to such procedures in response to the requirements of Item 407 (c)(2)(iv) of Regulation S-K or this Item.

ITEM 11. CONTROLS AND PROCEDURES.

(a)Based upon their evaluation of the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the "Act")) as conducted within 90 days of the filing date of this report on Form N-CSR, the Registrant's principal financial officer and principal executive officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the Registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms.

(b)There were no changes in the Registrant's internal controls over financial reporting (as defined in Rule 30a-3(d) under the Act) that occurred during the period covered by the report that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting.

ITEM 12. DISCLOSURE OF SECURITIES LENDING ACTIVITIES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable to the Registrant.

ITEM 13. RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION.

Not Applicable.

ITEM 14. EXHIBITS.

(a)(1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit: Attached hereto as EX-99.COE.

(2)A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2): Attached hereto as EX-99.302CERT.

(3)Any written solicitation to purchase securities under Rule 23c-1 under the Act (17 CFR 270.23c-1) sent or given during the period covered by the report by or on behalf of the registrant to 10 or more persons. Not applicable.

(4)Change in the registrant's independent public accountant. Not applicable.

 

(b)If the report is filed under Section 13(a) or 15(d) of the Exchange Act, provide the certifications required by Rule 30a-2(b) under the Act (17 CFR 270.30a-2(b)), Rule 13a-14(b) or Rule 15d-14(b) under the Exchange Act (17 CFR 240.13a-14(b) or 240.15d-14(b)) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) as an exhibit. A certification furnished pursuant to this paragraph will not be deemed "filed" for the purposes of Section 18 of the Exchange Act (15 U.S.C. 78r), or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference. Attached hereto as EX-99.906CERT.

 

Notice

A copy of the Amended and Restated Declaration of Trust, as amended, of the Registrant is on file with the Secretary of State of The Commonwealth of Massachusetts and notice is hereby given that this instrument is executed on behalf of the Registrant by an officer of the Registrant as an officer and not individually and the obligations of or arising out of this instrument are not binding upon any of the Trustees or shareholders individually, but are binding only upon the assets and property of the respective constituent series of the Registrant.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant) MFS SERIES TRUST IV

By (Signature and Title)*

/S/ DAVID L. DILORENZO

David L. DiLorenzo, President

Date: April 12, 2024

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*

/S/ DAVID L. DILORENZO

David L. DiLorenzo, President (Principal Executive Officer)

Date: April 12, 2024

By (Signature and Title)*

/S/ KASEY L. PHILLIPS

Kasey L. Phillips, Treasurer (Principal Financial Officer and Accounting Officer) Date: April 12, 2024

* Print name and title of each signing officer under his or her signature.



ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

99.COE

99.302CERT

99.906CERT