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 811-04367

Columbia Funds Series Trust I

(Exact name of registrant as specified in charter)

290 Congress Street

Boston, MA 02210

(Address of principal executive offices) (Zip code)

Michael G. Clarke

c/o Columbia Management Investment Advisers, LLC

290 Congress Street

Boston, MA 02210

Ryan C. Larrenaga, Esq.

c/o Columbia Management Investment Advisers, LLC

290 Congress Street

Boston, MA 02210

(Name and address of agent for service)

Registrant’s telephone number, including area code: (800) 345-6611

Date of fiscal year end: Last Day of December

Date of reporting period: June 30, 2026

Item 1. Reports to Stockholders.

Columbia Real Estate Equity Fund

Class A | CREAX

Semi-Annual Shareholder Report | June 30, 2026

This semi-annual shareholder report contains important information about Columbia Real Estate Equity Fund (the Fund) for the period of January 1, 2026 to June 30, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Table Summary
Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Class A	$66	1.22%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized

Key Fund Statistics

Table Summary
Fund net assets	$132,488,107
Total number of portfolio holdings	78
Portfolio turnover for the reporting period	24%

Columbia Real Estate Equity Fund | Class A | SSR212-01_(08/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Real Estate Sub-industry Allocation

Table Summary
Health Care REITs	22.7%
Retail REITs	17.3%
Industrial REITs	13.4%
Data Center REITs	12.1%
Multi-Family Residential REITs	8.9%
Other Specialized REITs	5.8%
Self Storage REITs	4.9%
Single-Family Residential REITs	4.6%
Hotel & Resort REITs	4.1%
Office REITs	2.4%
Diversified REITs	2.0%
Other	0.7%

Top Holdings

Table Summary
Welltower, Inc.	12.5%
Prologis, Inc.	10.0%
Equinix, Inc.	9.2%
Simon Property Group, Inc.	5.3%
Essex Property Trust, Inc.	3.5%
Ventas, Inc.	3.1%
Equity Residential	2.9%
Digital Realty Trust, Inc.	2.8%
Iron Mountain, Inc.	2.7%
Public Storage	2.7%

Asset Categories

Table Summary
Common Stocks		98.9%
Other		0.6%

Availability of Additional Information

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Real Estate Equity Fund | Class A | SSR212-01_(08/26) |

Columbia Real Estate Equity Fund

Class S | CREHX

Semi-Annual Shareholder Report | June 30, 2026

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Table Summary
Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Class S	$52	0.97%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized

Key Fund Statistics

Table Summary
Fund net assets	$132,488,107
Total number of portfolio holdings	78
Portfolio turnover for the reporting period	24%

Columbia Real Estate Equity Fund | Class S | SSR212-16_(08/26) |

Graphical Representation of Fund Holdings

Real Estate Sub-industry Allocation

Table Summary
Health Care REITs	22.7%
Retail REITs	17.3%
Industrial REITs	13.4%
Data Center REITs	12.1%
Multi-Family Residential REITs	8.9%
Other Specialized REITs	5.8%
Self Storage REITs	4.9%
Single-Family Residential REITs	4.6%
Hotel & Resort REITs	4.1%
Office REITs	2.4%
Diversified REITs	2.0%
Other	0.7%

Top Holdings

Table Summary
Welltower, Inc.	12.5%
Prologis, Inc.	10.0%
Equinix, Inc.	9.2%
Simon Property Group, Inc.	5.3%
Essex Property Trust, Inc.	3.5%
Ventas, Inc.	3.1%
Equity Residential	2.9%
Digital Realty Trust, Inc.	2.8%
Iron Mountain, Inc.	2.7%
Public Storage	2.7%

Asset Categories

Table Summary
Common Stocks		98.9%
Other		0.6%

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Real Estate Equity Fund | Class S | SSR212-16_(08/26) |

Columbia Real Estate Equity Fund

Institutional 2 Class | CRRVX

Semi-Annual Shareholder Report | June 30, 2026

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Table Summary
Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Institutional 2 Class	$47	0.88%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized

Key Fund Statistics

Table Summary
Fund net assets	$132,488,107
Total number of portfolio holdings	78
Portfolio turnover for the reporting period	24%

Columbia Real Estate Equity Fund | Institutional 2 Class | SSR212-15_(08/26) |

Graphical Representation of Fund Holdings

Real Estate Sub-industry Allocation

Table Summary
Health Care REITs	22.7%
Retail REITs	17.3%
Industrial REITs	13.4%
Data Center REITs	12.1%
Multi-Family Residential REITs	8.9%
Other Specialized REITs	5.8%
Self Storage REITs	4.9%
Single-Family Residential REITs	4.6%
Hotel & Resort REITs	4.1%
Office REITs	2.4%
Diversified REITs	2.0%
Other	0.7%

Top Holdings

Table Summary
Welltower, Inc.	12.5%
Prologis, Inc.	10.0%
Equinix, Inc.	9.2%
Simon Property Group, Inc.	5.3%
Essex Property Trust, Inc.	3.5%
Ventas, Inc.	3.1%
Equity Residential	2.9%
Digital Realty Trust, Inc.	2.8%
Iron Mountain, Inc.	2.7%
Public Storage	2.7%

Asset Categories

Table Summary
Common Stocks		98.9%
Other		0.6%

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Real Estate Equity Fund | Institutional 2 Class | SSR212-15_(08/26) |

Columbia Real Estate Equity Fund

Institutional 3 Class | CREYX

Semi-Annual Shareholder Report | June 30, 2026

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Table Summary
Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Institutional 3 Class	$45	0.84%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized

Key Fund Statistics

Table Summary
Fund net assets	$132,488,107
Total number of portfolio holdings	78
Portfolio turnover for the reporting period	24%

Columbia Real Estate Equity Fund | Institutional 3 Class | SSR212-17_(08/26) |

Graphical Representation of Fund Holdings

Real Estate Sub-industry Allocation

Table Summary
Health Care REITs	22.7%
Retail REITs	17.3%
Industrial REITs	13.4%
Data Center REITs	12.1%
Multi-Family Residential REITs	8.9%
Other Specialized REITs	5.8%
Self Storage REITs	4.9%
Single-Family Residential REITs	4.6%
Hotel & Resort REITs	4.1%
Office REITs	2.4%
Diversified REITs	2.0%
Other	0.7%

Top Holdings

Table Summary
Welltower, Inc.	12.5%
Prologis, Inc.	10.0%
Equinix, Inc.	9.2%
Simon Property Group, Inc.	5.3%
Essex Property Trust, Inc.	3.5%
Ventas, Inc.	3.1%
Equity Residential	2.9%
Digital Realty Trust, Inc.	2.8%
Iron Mountain, Inc.	2.7%
Public Storage	2.7%

Asset Categories

Table Summary
Common Stocks		98.9%
Other		0.6%

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Real Estate Equity Fund | Institutional 3 Class | SSR212-17_(08/26) |

Columbia Real Estate Equity Fund

Institutional Class | CREEX

Semi-Annual Shareholder Report | June 30, 2026

What were the Fund costs for the reporting period?

(Based on a hypothetical $10,000 investment)

Table Summary
Class	Cost of a $10,000 investment	Cost paid as a percentage of a $10,000 investment
Institutional Class	$52	0.97%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized

Key Fund Statistics

Table Summary
Fund net assets	$132,488,107
Total number of portfolio holdings	78
Portfolio turnover for the reporting period	24%

Columbia Real Estate Equity Fund | Institutional Class | SSR212-08_(08/26) |

Graphical Representation of Fund Holdings

Real Estate Sub-industry Allocation

Table Summary
Health Care REITs	22.7%
Retail REITs	17.3%
Industrial REITs	13.4%
Data Center REITs	12.1%
Multi-Family Residential REITs	8.9%
Other Specialized REITs	5.8%
Self Storage REITs	4.9%
Single-Family Residential REITs	4.6%
Hotel & Resort REITs	4.1%
Office REITs	2.4%
Diversified REITs	2.0%
Other	0.7%

Top Holdings

Table Summary
Welltower, Inc.	12.5%
Prologis, Inc.	10.0%
Equinix, Inc.	9.2%
Simon Property Group, Inc.	5.3%
Essex Property Trust, Inc.	3.5%
Ventas, Inc.	3.1%
Equity Residential	2.9%
Digital Realty Trust, Inc.	2.8%
Iron Mountain, Inc.	2.7%
Public Storage	2.7%

Asset Categories

Table Summary
Common Stocks		98.9%
Other		0.6%

Availability of Additional Information

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

Columbia Real Estate Equity Fund | Institutional Class | SSR212-08_(08/26) |

Item 2. Code of Ethics.

Not applicable.

Item 3. Audit Committee Financial Expert.

Not applicable.

Item 4. Principal Accountant Fees and Services.

Not applicable.

Item 5. Audit Committee of Listed Registrants.

Not applicable.

Item 6. Investments.

(a) The registrant’s “Schedule I – Investments in securities of unaffiliated issuers” (as set forth in 17 CFR 210.12-12) is included in Item 7 of this Form N-CSR.

(b) Not applicable.

Item 7. Financial Statements and Financial Highlights for Open-End Management Investment Companies.

Columbia Real Estate Equity Fund

Semi-Annual Financial Statements and Additional Information

June 30, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value

Table of Contents

Portfolio of Investments	3
Statement of Assets and Liabilities	9
Statement of Operations	10
Statement of Changes in Net Assets	11
Financial Highlights	14
Notes to Financial Statements	18
Approval of Management Agreement	29

Columbia Real Estate Equity Fund | 2026

Portfolio of Investments

June 30, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 98.9%
Issuer	Shares	Value ($)
Real Estate 98.9%
Data Center REITs 12.1%
Digital Realty Trust, Inc.	20,789	3,733,289
Equinix, Inc.(a)	11,755	12,253,294
Total		15,986,583
Diversified REITs 2.0%
American Assets Trust, Inc.	5,544	136,881
Federal Realty Investment Trust	18,850	2,326,844
Global Net Lease, Inc.	21,236	189,850
Total		2,653,575
Health Care REITs 22.7%
Alexandria Real Estate Equities, Inc.	16,964	896,547
American Healthcare REIT, Inc.	44,514	2,321,405
CareTrust REIT, Inc.	55,793	2,251,248
Diversified Healthcare Trust	23,404	217,657
Healthpeak Properties, Inc.	68,733	1,470,886
Janus Living, Inc., Class A1	45,235	1,300,054
LTC Properties, Inc.	4,583	176,216
Medical Properties Trust, Inc.	54,003	249,494
National Health Investors, Inc.	4,623	352,550
Sila Realty Trust, Inc.	6,091	184,923
Ventas, Inc.	45,867	4,072,990
Welltower, Inc.(a)	73,227	16,620,332
Total		30,114,302
Hotel & Resort REITs 4.1%
Apple Hospitality REIT, Inc.	21,706	364,878
DiamondRock Hospitality Co.	19,780	240,920
Host Hotels & Resorts, Inc.	143,000	3,390,530
Pebblebrook Hotel Trust	11,756	228,184
Ryman Hospitality Properties, Inc.	5,951	765,001
Service Properties Trust	28,700	48,503
Sunstone Hotel Investors, Inc.	17,690	202,551
Xenia Hotels & Resorts, Inc.	9,964	202,867
Total		5,443,434

Common Stocks (continued)
Issuer	Shares	Value ($)
Industrial REITs 13.4%
Americold Realty Trust, Inc.	30,919	486,047
EastGroup Properties, Inc.	10,208	2,067,426
First Industrial Realty Trust, Inc.	12,908	791,389
Innovative Industrial Properties, Inc.	2,595	160,838
LXP Industrial Trust	5,323	286,803
Prologis, Inc.(a)	98,125	13,292,994
STAG Industrial, Inc.	18,626	708,906
Total		17,794,403
Multi-Family Residential REITs 8.9%
AvalonBay Communities, Inc.(a)	14,161	2,672,039
Centerspace	1,630	91,590
Elme Communities	12,200	18,056
Equity Residential	57,334	3,894,699
Essex Property Trust, Inc.(a)	16,106	4,696,348
Independence Realty Trust, Inc.	24,142	402,930
Total		11,775,662
Office REITs 2.4%
Cousins Properties, Inc.	16,392	491,432
Douglas Emmett, Inc.	17,541	206,984
Easterly Government Properties, Inc.	4,765	118,792
Empire State Realty Trust, Inc., Class A	15,998	86,549
Hudson Pacific Properties, Inc.(b)	4,271	64,877
NET Lease Office Properties	2,147	23,896
Piedmont Realty Trust, Inc.(b)	12,065	110,395
SL Green Realty Corp.	7,629	394,953
Vornado Realty Trust	41,741	1,640,421
Total		3,138,299
Other Specialized REITs 5.8%
Four Corners Property Trust, Inc.	10,217	250,827
Gaming and Leisure Properties, Inc.	30,909	1,376,378
Iron Mountain, Inc.	28,796	3,637,223
Lamar Advertising Co., Class A	8,483	1,323,178
Millrose Properties, Inc.	15,900	477,795
Outfront Media, Inc.	14,450	473,382
Safehold, Inc.	6,288	98,722
Total		7,637,505

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Portfolio of Investments (continued)

June 30, 2026 (Unaudited)

Common Stocks (continued)
Issuer	Shares	Value ($)
Retail REITs 17.3%
Acadia Realty Trust	13,010	272,039
Brixmor Property Group, Inc.	30,568	963,809
Curbline Properties Corp.	79,671	2,421,999
Getty Realty Corp.	6,400	213,504
InvenTrust Properties Corp.	68,174	2,413,360
Kimco Realty Corp.	67,006	1,698,602
Kite Realty Group Trust	21,516	610,624
Macerich Co. (The)	112,398	2,831,306
NetSTREIT Corp.	9,187	194,121
NNN REIT, Inc.	19,005	884,303
Phillips Edison & Co., Inc.	12,260	510,261
Realty Income Corp.	47,743	2,958,156
Simon Property Group, Inc.(a)	31,219	6,982,129
Total		22,954,213
Self Storage REITs 4.9%
CubeSmart	24,470	973,172
Extra Space Storage, Inc.(a)	11,890	1,727,617
National Storage Affiliates Trust	7,066	314,225
Public Storage	11,140	3,545,973
Total		6,560,987

Common Stocks (continued)
Issuer	Shares	Value ($)
Single-Family Residential REITs 4.6%
Equity LifeStyle Properties, Inc.	50,545	3,257,625
Invitation Homes, Inc.	94,325	2,849,558
Total		6,107,183
Telecom Tower REITs 0.7%
American Tower Corp.	5,569	910,921
Total Real Estate		131,077,067
Total Common Stocks (Cost: $82,240,522)		131,077,067

Money Market Funds 0.6%
	Shares	Value ($)
Columbia Short-Term Cash Fund, 3.767%(c),(d)	788,510	788,037
Total Money Market Funds (Cost: $788,177)		788,037
Total Investments in Securities (Cost $83,028,699)		131,865,104
Other Assets & Liabilities, Net		623,003
Net Assets		$132,488,107

At June 30, 2026, securities and/or cash totaling $18,841,511 were pledged as collateral.

Investments in derivatives

Swap arrangement - contracts for differences
Fund receives	Fund pays	Payment frequency	Counterparty	Maturity date	Notional currency	Notional amount	Value ($)	Cash & other receivable (payable) ($)	Unrealized appreciation ($)	Unrealized depreciation ($)
Appreciation on underlying contracts for differences (CFDs), accrued income on long CFDs, and SOFR less a spread of 40 basis points on short CFDs	Depreciation on underlying CFDs, accrued income on underlying short CFDs, and SOFR plus a spread of 40 basis points on long CFDs	Monthly	Goldman Sachs International	06/05/2029	USD	26,721,416	(68,200 )	46,433	—	(21,767 )

The following table represents the contracts for differences underlying the swap arrangement as of June 30, 2026. Percentages represent the unrealized appreciation (depreciation) of each underlying contract for difference compared to the aggregate unrealized appreciation (depreciation) of the swap arrangement:

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Long Equity Contracts for Differences
Real Estate
Data Center REITs
Equinix, Inc.	284	302,284	(6,245 )	28.7

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Portfolio of Investments (continued)

June 30, 2026 (Unaudited)

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Hotel & Resort REITs
Ryman Hospitality Properties, Inc.	12,053	1,476,131	73,282	(336.7 )
Host Hotels & Resorts, Inc.	8,900	220,809	(9,790 )	45.0
Industrial REITs
Rexford Industrial Realty, Inc.	23,527	818,740	(30,585 )	140.5
Lineage, Inc.	7,452	323,193	(894 )	4.1
Multi-Family Residential REITs
Mid-America Apartment Communities, Inc.	11,394	1,564,738	18,344	(84.3 )
Office REITs
Highwoods Properties, Inc.	10,589	312,058	7,306	(33.6 )
BXP, Inc.	32,193	2,124,094	10,624	(48.8 )
Other Specialized REITs
Gaming and Leisure Properties, Inc.	77,944	3,643,102	(172,256 )	791.4
EPR Properties	31,142	1,817,447	(10,900 )	50.1
Single-Family Residential REITs
Invitation Homes, Inc.	99,569	2,904,428	103,552	(475.7 )
Total		15,507,024	(17,562 )

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Short Equity Contracts for Differences
Real Estate
Diversified REITs
WP Carey, Inc.	(14,567 )	(1,099,371 )	57,831	(265.7 )
Broadstone Net Lease Inc	(46,552 )	(967,816 )	5,586	(25.7 )
Health Care REITs
Omega Healthcare Investors, Inc.	(8,451 )	(382,070 )	(20,874 )	95.9
Sabra Health Care REIT, Inc.	(65,554 )	(1,217,993 )	(60,965 )	280.1
Healthcare Realty Trust, Inc.	(37,611 )	(771,402 )	12,788	(58.7 )
Hotel & Resort REITs
Park Hotels & Resorts, Inc.	(96,845 )	(1,394,568 )	14,527	(66.7 )
Multi-Family Residential REITs
Camden Property Trust	(1,284 )	(145,734 )	(1,271 )	5.8
Office REITs
Kilroy Realty Corp.	(19,156 )	(735,016 )	17,240	(79.2 )
Retail REITs
Regency Centers Corp.	(14,660 )	(1,161,951 )	(7,037 )	32.3
Single-Family Residential REITs
American Homes 4 Rent, Class A	(90,975 )	(2,967,605 )	(81,878 )	376.2
Sun Communities, Inc.	(2,981 )	(370,866 )	13,415	(61.6 )
Total		(11,214,392 )	(50,638 )

Swap arrangement - contracts for differences
Fund receives	Fund pays	Payment frequency	Counterparty	Maturity date	Notional currency	Notional amount	Value ($)	Cash & other receivable (payable) ($)	Unrealized appreciation ($)	Unrealized depreciation ($)
Appreciation on underlying contracts for difference (CFDs), accrued income on long CFDs, and 1-Day Overnight Fed Funds Effective Rate less a spread of 35 basis points on short CFDs	Depreciation on underlying CFDs, accrued income on underlying short CFDs, and 1-Day Overnight Fed Funds Effective Rate plus a spread of 40 basis points on long CFDs	Monthly	Morgan Stanley	08/04/2027	USD	4,778,144	(27,194 )	30,070	2,876	—

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Portfolio of Investments (continued)

June 30, 2026 (Unaudited)

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Long Equity Contracts for Differences
Real Estate
Diversified REITs
Essential Properties Realty Trust, Inc.	104,265	3,155,059	(42,749 )	(1,485.9 )
Office REITs
Brandywine Realty Trust	28,300	90,560	(849 )	(29.5 )
Total		3,245,619	(43,598 )

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Short Equity Contracts for Differences
Real Estate
Retail REITs
Tanger, Inc.	(38,412 )	(1,532,525 )	16,404	570.2
Total		(1,532,525 )	16,404

Swap arrangement - contracts for differences
Fund receives	Fund pays	Payment frequency	Counterparty	Maturity date	Notional currency	Notional amount	Value ($)	Cash & other receivable (payable) ($)	Unrealized appreciation ($)	Unrealized depreciation ($)
Appreciation on underlying contracts for differences (CFDs), accrued income on long CFDs, and OBFR on short CFDs	Depreciation on underlying CFDs, accrued income on underlying short CFDs, and OBFR plus a spread of 46.5 basis points on long CFDs	Monthly	UBS	11/03/2026	USD	17,833,918	7,112	(75,585 )	—	(68,473 )

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Long Equity Contracts for Differences
Real Estate
Office REITs
Vornado Realty Trust	25,691	984,736	24,920	(36.4 )
Retail REITs
Agree Realty Corp.	45,888	3,417,280	58,278	(85.1 )
Self Storage REITs
CubeSmart	31,548	1,303,563	(48,899 )	71.4
SmartStop Self Storage REIT, Inc.	45,644	1,472,019	11,411	(16.7 )
Total		7,177,598	45,710

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Short Equity Contracts for Differences
Real Estate
Hotel & Resort REITs
RLJ Lodging Trust	(205,929 )	(2,279,634 )	(160,625 )	234.6
Industrial REITs
Terreno Realty Corp	(19,769 )	(1,318,790 )	38,352	(56.0 )
Multi-Family Residential REITs
UDR, Inc.	(39,232 )	(1,526,125 )	(40,017 )	58.4
Office REITs
Corporate Office Properties Trust	(19,808 )	(669,709 )	(51,105 )	74.6
JBG Smith Properties	(36,351 )	(514,003 )	(19,266 )	28.1
Other Specialized REITs
VICI Properties, Inc.	(31,472 )	(880,901 )	45,320	(66.2 )

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Portfolio of Investments (continued)

June 30, 2026 (Unaudited)

Description	Shares	Notional Amount ($)	Appreciation (Depreciation) ($)	(%)
Retail REITs
Urban Edge Properties	(108,296 )	(2,482,144 )	4,332	(6.3 )
Telecom Tower REITs
Crown Castle International Corp.	(11,100 )	(985,014 )	144,411	(210.9 )
Total		(10,656,320 )	(38,598 )

Reference index and values for swap contracts as of period end
Reference index		Reference rate
1-Day Overnight Fed Funds Effective Rate	Overnight Federal Funds Effective Rate	3.630%
OBFR	Overnight Bank Funding Rate	3.630%
SOFR	Secured Overnight Financing Rate	3.620%

Notes to Portfolio of Investments

(a)	This security or a portion of this security has been pledged as collateral in connection with investments sold short and/or derivative contracts.
(b)	Non-income producing investment.
(c)	The rate shown is the seven-day current annualized yield at June 30, 2026.
(d)	Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the period ended June 30, 2026 are as follows:

Affiliated issuers	Beginning of period($)	Purchases($)	Sales($)	Net change in unrealized appreciation (depreciation)($)	End of period($)	Realized gain (loss)($)	Dividends($)	End of period shares
Columbia Short-Term Cash Fund, 3.767%
	2,165,366	16,648,206	(18,025,352 )	(183 )	788,037	(286 )	55,471	788,510

Abbreviation Legend

OBFR	Overnight Bank Funding Rate
SOFR	Secured Overnight Financing Rate

Currency Legend

USD

US Dollar

Fair value measurements

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.

■

Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Portfolio of Investments (continued)

June 30, 2026 (Unaudited)

Fair value measurements (continued)

(the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at June 30, 2026:

	Level 1 ($)	Level 2 ($)	Level 3 ($)	Total ($)
Investments in Securities
Common Stocks
Real Estate	131,077,067	—	—	131,077,067
Total Common Stocks	131,077,067	—	—	131,077,067
Money Market Funds	788,037	—	—	788,037
Total Investments in Securities	131,865,104	—	—	131,865,104
Investments in Derivatives
Asset
Swap Contracts	—	2,876	—	2,876
Liability
Swap Contracts	—	(90,240 )	—	(90,240 )
Total	131,865,104	(87,364 )	—	131,777,740

See the Portfolio of Investments for all investment classifications not indicated in the table.

The Fund’s assets assigned to the Level 2 input category are generally valued using the market approach, in which a security’s value is determined through reference to prices and information from market transactions for similar or identical assets.

Derivative instruments are valued at unrealized appreciation (depreciation).

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Statement of Assets and Liabilities

June 30, 2026 (Unaudited)

Assets
Investments in securities, at value
Unaffiliated issuers (cost $82,240,522)	$131,077,067
Affiliated issuers (cost $788,177)	788,037
Cash collateral held at broker for:
Swap contracts	400,000
Unrealized appreciation on swap contracts	2,876
Receivable for:
Investments sold	1,053,651
Capital shares sold	18,095
Dividends	554,367
Expense reimbursement due from Investment Manager	476
Prepaid expenses	210
Deferred compensation of board members	180,101
Other assets	5,829
Total assets	134,080,709
Liabilities
Unrealized depreciation on swap contracts	90,240
Payable for:
Investments purchased	1,179,289
Capital shares redeemed	58,713
Management services fees	2,774
Distribution and/or service fees	276
Transfer agent fees	12,187
Compensation of chief compliance officer	12
Compensation of board members	1,285
Other expenses	32,296
Deferred compensation of board members	215,530
Total liabilities	1,592,602
Net assets applicable to outstanding capital stock	$132,488,107
Represented by
Paid in capital	79,096,165
Total distributable earnings (loss)	53,391,942
Total - representing net assets applicable to outstanding capital stock	$132,488,107
Class A
Net assets	$39,563,047
Shares outstanding	3,717,369
Net asset value per share	$10.64
Maximum sales charge	5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)	$11.29
Institutional Class
Net assets	$64,136,041
Shares outstanding	5,992,616
Net asset value per share	$10.70
Institutional 2 Class
Net assets	$1,847,298
Shares outstanding	173,953
Net asset value per share	$10.62
Institutional 3 Class
Net assets	$11,255,341
Shares outstanding	1,034,402
Net asset value per share	$10.88
Class S
Net assets	$15,686,380
Shares outstanding	1,465,337
Net asset value per share	$10.70

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Statement of Operations

Six Months Ended June 30, 2026 (Unaudited)

Net investment income
Income:
Dividends — unaffiliated issuers	$2,619,507
Dividends — affiliated issuers	55,471
Total income	2,674,978
Expenses:
Management services fees	499,292
Distribution and/or service fees
Class A	47,633
Transfer agent fees
Class A	26,584
Institutional Class	43,265
Institutional 2 Class	479
Institutional 3 Class	374
Class S	10,300
Custodian fees	3,112
Printing and postage fees	13,913
Registration fees	53,406
Accounting services fees	21,659
Legal fees	8,111
Compensation of chief compliance officer	9
Compensation of board members	6,262
Deferred compensation of board members	5,664
Other	5,497
Total expenses	745,560
Fees waived or expenses reimbursed by Investment Manager and its affiliates	(64,415 )
Total net expenses	681,145
Net investment income	1,993,833
Realized and unrealized gain (loss) — net
Net realized gain (loss) on:
Investments — unaffiliated issuers	4,415,196
Investments — affiliated issuers	(286 )
Swap contracts	(1,170,495 )
Net realized gain	3,244,415
Net change in unrealized appreciation (depreciation) on:
Investments — unaffiliated issuers	16,677,323
Investments — affiliated issuers	(183 )
Swap contracts	(241,479 )
Net change in unrealized appreciation (depreciation)	16,435,661
Net realized and unrealized gain	19,680,076
Net increase in net assets resulting from operations	$21,673,909

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Statement of Changes in Net Assets

	Six Months Ended June 30, 2026 (Unaudited)	Year Ended December 31, 2025
Operations
Net investment income	$1,993,833	$3,082,554
Net realized gain	3,244,415	6,280,586
Net change in unrealized appreciation (depreciation)	16,435,661	(9,083,002 )
Net increase in net assets resulting from operations	21,673,909	280,138
Distributions to shareholders
Net investment income and net realized gains
Class A	(758,880 )	(2,244,106 )
Institutional Class	(1,217,921 )	(3,761,809 )
Institutional 2 Class	(35,496 )	(149,130 )
Institutional 3 Class	(213,883 )	(1,238,941 )
Class S	(298,676 )	(856,667 )
Total distributions to shareholders	(2,524,856 )	(8,250,653 )
Decrease in net assets from capital stock activity	(16,697,961 )	(30,499,232 )
Total increase (decrease) in net assets	2,451,092	(38,469,747 )
Net assets at beginning of period	130,037,015	168,506,762
Net assets at end of period	$132,488,107	$130,037,015

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Statement of Changes in Net Assets (continued)

	Six Months Ended		Year Ended
	June 30, 2026 (Unaudited)		December 31, 2025
	Shares	Dollars ($)	Shares	Dollars ($)
Capital stock activity
Class A
Shares sold	79,593	806,107	258,156	2,496,836
Distributions reinvested	69,298	726,935	230,967	2,159,084
Shares redeemed	(460,276 )	(4,599,864 )	(900,262 )	(8,686,319 )
Net decrease	(311,385 )	(3,066,822 )	(411,139 )	(4,030,399 )
Institutional Class
Shares sold	176,085	1,785,140	1,079,298	10,426,624
Distributions reinvested	110,485	1,165,614	384,245	3,611,064
Shares redeemed	(567,142 )	(5,924,053 )	(2,691,503 )	(26,249,771 )
Net decrease	(280,572 )	(2,973,299 )	(1,227,960 )	(12,212,083 )
Institutional 2 Class
Shares sold	33,140	342,035	140,931	1,352,806
Distributions reinvested	3,393	35,496	15,867	149,130
Shares redeemed	(33,247 )	(339,402 )	(730,377 )	(6,982,028 )
Net increase (decrease)	3,286	38,129	(573,579 )	(5,480,092 )
Institutional 3 Class
Shares sold	58,385	592,999	179,484	1,750,880
Distributions reinvested	19,638	210,524	128,530	1,227,074
Shares redeemed	(1,068,120 )	(11,251,232 )	(937,988 )	(9,250,724 )
Net decrease	(990,097 )	(10,447,709 )	(629,974 )	(6,272,770 )
Class S
Shares sold	5,731	58,317	23,562	227,152
Distributions reinvested	28,311	298,676	91,241	856,667
Shares redeemed	(59,502 )	(605,253 )	(368,789 )	(3,587,707 )
Net decrease	(25,460 )	(248,260 )	(253,986 )	(2,503,888 )
Total net decrease	(1,604,228 )	(16,697,961 )	(3,096,638 )	(30,499,232 )

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

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Columbia Real Estate Equity Fund | 2026

Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%.

	Net asset value, beginning of period	Net investment income (loss)	Net realized and unrealized gain (loss)	Total from investment operations	Distributions from net investment income	Distributions from net realized gains	Total distributions to shareholders
Class A
Six Months Ended 6/30/2026 (Unaudited)	$9.25	0.14	1.46	1.60	(0.06 )	(0.15 )	(0.21 )
Year Ended 12/31/2025	$9.81	0.18	(0.18 )	0.00	(0.04 )	(0.52 )	(0.56 )
Year Ended 12/31/2024	$10.06	0.18	0.54	0.72	(0.32 )	(0.65 )	(0.97 )
Year Ended 12/31/2023	$11.53	0.25	1.51	1.76	(0.27 )	(2.96 )	(3.23 )
Year Ended 12/31/2022	$16.29	0.18	(4.29 )	(4.11 )	(0.18 )	(0.47 )	(0.65 )
Year Ended 12/31/2021	$12.30	0.09	4.91	5.00	(0.17 )	(0.84 )	(1.01 )
Institutional Class
Six Months Ended 6/30/2026 (Unaudited)	$9.29	0.15	1.47	1.62	(0.06 )	(0.15 )	(0.21 )
Year Ended 12/31/2025	$9.85	0.20	(0.18 )	0.02	(0.06 )	(0.52 )	(0.58 )
Year Ended 12/31/2024	$10.10	0.21	0.54	0.75	(0.35 )	(0.65 )	(1.00 )
Year Ended 12/31/2023	$11.56	0.28	1.52	1.80	(0.30 )	(2.96 )	(3.26 )
Year Ended 12/31/2022	$16.33	0.22	(4.31 )	(4.09 )	(0.21 )	(0.47 )	(0.68 )
Year Ended 12/31/2021	$12.33	0.12	4.93	5.05	(0.21 )	(0.84 )	(1.05 )
Institutional 2 Class
Six Months Ended 6/30/2026 (Unaudited)	$9.21	0.16	1.46	1.62	(0.06 )	(0.15 )	(0.21 )
Year Ended 12/31/2025	$9.78	0.19	(0.17 )	0.02	(0.07 )	(0.52 )	(0.59 )
Year Ended 12/31/2024	$10.03	0.25	0.51	0.76	(0.36 )	(0.65 )	(1.01 )
Year Ended 12/31/2023	$11.50	0.30	1.51	1.81	(0.32 )	(2.96 )	(3.28 )
Year Ended 12/31/2022	$16.25	0.23	(4.28 )	(4.05 )	(0.23 )	(0.47 )	(0.70 )
Year Ended 12/31/2021	$12.28	0.14	4.89	5.03	(0.22 )	(0.84 )	(1.06 )
Institutional 3 Class
Six Months Ended 6/30/2026 (Unaudited)	$9.43	0.15	1.51	1.66	(0.06 )	(0.15 )	(0.21 )
Year Ended 12/31/2025	$10.00	0.21	(0.18 )	0.03	(0.08 )	(0.52 )	(0.60 )
Year Ended 12/31/2024	$10.23	0.22	0.56	0.78	(0.36 )	(0.65 )	(1.01 )
Year Ended 12/31/2023	$11.68	0.26	1.57	1.83	(0.32 )	(2.96 )	(3.28 )
Year Ended 12/31/2022	$16.49	0.24	(4.34 )	(4.10 )	(0.24 )	(0.47 )	(0.71 )
Year Ended 12/31/2021	$12.44	0.16	4.96	5.12	(0.23 )	(0.84 )	(1.07 )

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Financial Highlights (continued)

	Net asset value, end of period	Total return	Total gross expense ratio to average net assets(a)	Total net expense ratio to average net assets(a),(b)	Net investment income (loss) ratio to average net assets	Portfolio turnover	Net assets, end of period (000’s)
Class A
Six Months Ended 6/30/2026 (Unaudited)	$10.64	17.29%	1.32%	1.22%	2.82%	24%	$39,563
Year Ended 12/31/2025	$9.25	(0.01% )	1.30%	1.24% (c)	1.83%	43%	$37,257
Year Ended 12/31/2024	$9.81	7.21%	1.27%	1.22% (c)	1.76%	41%	$43,573
Year Ended 12/31/2023	$10.06	15.66%	1.29% (d)	1.23% (c),(d)	2.13%	58%	$47,369
Year Ended 12/31/2022	$11.53	(25.33% )	1.27% (d)	1.25% (c),(d)	1.36%	28%	$47,507
Year Ended 12/31/2021	$16.29	41.74%	1.26%	1.26% (c)	0.63%	5%	$73,177
Institutional Class
Six Months Ended 6/30/2026 (Unaudited)	$10.70	17.43%	1.07%	0.97%	3.06%	24%	$64,136
Year Ended 12/31/2025	$9.29	0.24%	1.05%	0.99% (c)	2.05%	43%	$58,262
Year Ended 12/31/2024	$9.85	7.44%	1.02%	0.97% (c)	2.05%	41%	$73,917
Year Ended 12/31/2023	$10.10	15.99%	1.04% (d)	0.98% (c),(d)	2.36%	58%	$76,051
Year Ended 12/31/2022	$11.56	(25.13% )	1.02% (d)	1.00% (c),(d)	1.63%	28%	$82,320
Year Ended 12/31/2021	$16.33	42.06%	1.01%	1.01% (c)	0.88%	5%	$120,982
Institutional 2 Class
Six Months Ended 6/30/2026 (Unaudited)	$10.62	17.59%	0.99%	0.88%	3.19%	24%	$1,847
Year Ended 12/31/2025	$9.21	0.23%	0.95%	0.90%	1.94%	43%	$1,572
Year Ended 12/31/2024	$9.78	7.56%	0.92%	0.90%	2.33%	41%	$7,280
Year Ended 12/31/2023	$10.03	16.10%	0.94% (d)	0.88% (d)	2.52%	58%	$1,045
Year Ended 12/31/2022	$11.50	(25.05% )	0.90% (d)	0.90% (d)	1.73%	28%	$938
Year Ended 12/31/2021	$16.25	42.15%	0.90%	0.89%	1.02%	5%	$1,321
Institutional 3 Class
Six Months Ended 6/30/2026 (Unaudited)	$10.88	17.60%	0.93%	0.84%	3.05%	24%	$11,255
Year Ended 12/31/2025	$9.43	0.28%	0.91%	0.85%	2.17%	43%	$19,097
Year Ended 12/31/2024	$10.00	7.69%	0.87%	0.82%	2.08%	41%	$26,542
Year Ended 12/31/2023	$10.23	16.09%	0.87% (d)	0.83% (d)	2.11%	58%	$44,303
Year Ended 12/31/2022	$11.68	(25.00% )	0.84% (d)	0.84% (d)	1.81%	28%	$96,459
Year Ended 12/31/2021	$16.49	42.33%	0.84%	0.83%	1.06%	5%	$134,201

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Financial Highlights (continued)

	Net asset value, beginning of period	Net investment income (loss)	Net realized and unrealized gain (loss)	Total from investment operations	Distributions from net investment income	Distributions from net realized gains	Total distributions to shareholders
Class S
Six Months Ended 6/30/2026 (Unaudited)	$9.29	0.15	1.47	1.62	(0.06 )	(0.15 )	(0.21 )
Year Ended 12/31/2025	$9.86	0.20	(0.19 )	0.01	(0.06 )	(0.52 )	(0.58 )
Year Ended 12/31/2024(e)	$11.22	0.06	(0.66 )(f)	(0.60 )	(0.25 )	(0.51 )	(0.76 )

Notes to Financial Highlights
(a)	In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b)	Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c)	The benefits derived from expense reductions had an impact of less than 0.01%.
(d)	Ratios include interfund lending expense which is less than 0.01%.
(e)	Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.
(f)	Calculation of the net gain (loss) per share (both realized and unrealized) does not correlate to the aggregate realized and unrealized gain (loss) presented in the Statement of Operations due to timing of Fund shares sold and redeemed in relation to fluctuations in the market value of the portfolio. For a new share class, the difference may be due to the timing of the commencement of operations for the share class.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Financial Highlights (continued)

	Net asset value, end of period	Total return	Total gross expense ratio to average net assets(a)	Total net expense ratio to average net assets(a),(b)	Net investment income (loss) ratio to average net assets	Portfolio turnover	Net assets, end of period (000’s)
Class S
Six Months Ended 6/30/2026 (Unaudited)	$10.70	17.43%	1.07%	0.97%	3.08%	24%	$15,686
Year Ended 12/31/2025	$9.29	0.14%	1.05%	0.99% (c)	2.06%	43%	$13,848
Year Ended 12/31/2024 (e)	$9.86	(5.56% )	0.98%	0.97%	2.36%	41%	$17,196

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements

June 30, 2026 (Unaudited)

Note 1. Organization

Columbia Real Estate Equity Fund (the Fund), a series of Columbia Funds Series Trust I (the Trust), was organized as a non-diversified fund; however, the Fund may, nonetheless, operate as a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Massachusetts business trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class, Institutional 3 Class and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time.

Swap transactions are valued through an independent pricing service or broker, or if neither is available, through an internal model based upon observable inputs.

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Derivative instruments

The Fund invests in certain derivative instruments, as detailed below, in seeking to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional exposure of a financial instrument is the nominal or face amount that is used to calculate payments made on that instrument and/or changes in value for the instrument. The notional exposure is a hypothetical underlying quantity upon which payment obligations are computed. Notional exposures provide a gauge for how the Fund may behave given changes in the underlying rate, asset or reference instrument and individual markets. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.

A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally expected to be limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty provides some protection in the case of clearing member default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the primary counterparty credit risk is the risk of failure of the clearinghouse. However, credit risk still exists in exchange-traded and centrally cleared derivatives with respect to any collateral that is held in a broker’s customer accounts. While clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is not remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all the clearing broker’s customers (including the Fund) by account class, potentially resulting in losses to the Fund.

In connection with certain over-the-counter derivatives, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

and foreign exchange forward contracts and contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.

Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker or receive interest income on cash collateral pledged to the broker. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.

Swap contracts

Swap contracts are negotiated in the over-the-counter market and are entered into bilaterally or centrally cleared (centrally cleared swap contract). In a centrally cleared swap contract, immediately following execution of the swap contract with a broker, the swap contract is novated to a central counterparty and the central counterparty becomes the Fund’s counterparty to the centrally cleared swap contract. The Fund is required to deposit initial margin with the futures commission merchant (FCM), which pledges it through to the central counterparty in the form of cash or securities in an amount that varies depending on the size and risk profile of the particular swap contract. Securities deposited as initial margin are designated in the Portfolio of Investments and cash deposited is recorded in the Statement of Assets and Liabilities as margin deposits. For a bilateral swap contract, the Fund has credit exposure to the broker, but exchanges daily variation margin with the broker based on the marked-to-market value of the swap contract to minimize that exposure. For centrally cleared swap contracts, there is less credit exposure to the FCM than in the case of an over-the-counter derivative, because the central counterparty provides some protection in the case of clearing member default. The central counterparty stands between the buyer and the seller of the swap contract; therefore, failure of the clearinghouse may pose additional counterparty credit risk. However, credit risk still exists in centrally cleared swaps to the extent initial and variation margin is held in an FCM’s customer account. While FCMs are required to segregate customer margin from their own assets, in the event that an FCM becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the FCM for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all of the FCM’s customers (including the Fund) by account class, potentially resulting in losses to the Fund. Swap

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

contracts are marked-to-market daily and changes in value are recorded as unrealized appreciation (depreciation). The daily change in valuation of centrally cleared swap contracts, if any, is recorded as a receivable or payable for variation margin in the Statement of Assets and Liabilities.

Entering into these contracts involves, to varying degrees, elements of interest, liquidity and counterparty credit risk in excess of the amounts recognized in the Statement of Assets and Liabilities. Such risks involve the possibility that there may be unfavorable changes in interest rates, market conditions or other conditions, that it may be difficult to initiate a swap transaction or liquidate a position at an advantageous time or price which may result in significant losses, and that the bilateral counterparty, FCM or central counterparty, as applicable, may not fulfill its obligation under the contract.

Swap arrangements - contracts for differences

The Fund entered into swap arrangements, particularly contracts for differences (CFDs), to obtain long and short exposures to the sectors disclosed on the Portfolio of Investments. CFDs are swap arrangements in which the parties agree that their return (or loss) will be based on the relative performance of two or more individual securities or baskets of securities or other instruments where the parties agree to exchange the difference in the settlement price between the open and closing trades for the particular assets.

CFDs are valued daily, and the change in value is recorded as unrealized appreciation (depreciation). The swap arrangement resets monthly, at which time the Fund settles in cash with the counterparty. Payments received (or made) by the Fund are recorded as realized gains (losses). CFDs are subject to the risk associated with investment in the underlying reference assets. The risk in the case of short CFD positions is unlimited based on the potential for unlimited increases in the market value of the underlying reference assets. The risk may be offset if the Fund holds any of the underlying reference assets. The risk in the case of long CFD positions is limited to the notional amount of the position at the time the Fund enters into the CFD.

Effects of derivative transactions in the financial statements

The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.

The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at June 30, 2026:

	Asset derivatives
Risk exposure category	Statement of assets and liabilities location	Fair value ($)
Equity risk	Component of total distributable earnings (loss) — unrealized appreciation on swap contracts	2,876 *

	Liability derivatives
Risk exposure category	Statement of assets and liabilities location	Fair value ($)
Equity risk	Component of total distributable earnings (loss) — unrealized depreciation on swap contracts	90,240 *

*	Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin for futures and centrally cleared swaps, if any, is reported in receivables or payables in the Statement of Assets and Liabilities.

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the six months ended June 30, 2026:

Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category	Swap contracts ($)
Equity risk	(1,170,495 )

Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category	Swap contracts ($)
Equity risk	(241,479 )

The following table is a summary of the average daily outstanding volume by derivative instrument for the six months ended June 30, 2026:

Derivative instrument	Average unrealized appreciation ($)	Average unrealized depreciation ($)
Swap arrangements - contracts for differences	149,107	(245,246 )

Offsetting of assets and liabilities

The following table presents the Fund’s gross and net amount of assets and liabilities available for offset under netting arrangements with counterparties as well as any related collateral received or pledged by the Fund as of June 30, 2026:

		Goldman Sachs International	Morgan Stanley	UBS	Total
Assets
OTC Swap arrangements - contracts for differences (a)	$	-	2,876	-	2,876
Liabilities
OTC Swap arrangements - contracts for differences (a)		21,767	-	68,473	90,240
Total financial and derivative net assets		(21,767 )	2,876	(68,473 )	(87,364 )
Total collateral received (pledged) (b)		(21,767 )	-	(68,473 )	(90,240 )
Net amount (c)	$	-	2,876	-	2,876

(a)	Over-the-Counter (OTC) swap arrangements - contracts for difference are presented at unrealized appreciation or (depreciation), which is comprised of market value plus cash & other receivable (payable).
(b)	In some instances, the actual collateral received and/or pledged may be more than the amount shown due to overcollateralization.
(c)	Represents the net amount due from/(to) counterparties in the event of default.

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are recorded on the ex-dividend date.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported,

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.75% to 0.66% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended June 30, 2026 was 0.75% of the Fund’s average daily net assets.

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

Participating Affiliates

The Investment Manager and its investment advisory affiliates (Participating Affiliates) around the world may coordinate in providing services to their clients. From time to time the Investment Manager (or any affiliated investment subadviser to the Fund, as the case may be) may engage its Participating Affiliates to provide a variety of services such as investment research, investment monitoring, trading and discretionary investment management (including portfolio management) to certain accounts managed by the Investment Manager, including the Fund. These Participating Affiliates provide services to the Investment Manager (or any affiliated investment subadviser to the Fund, as the case may be) either pursuant to subadvisory agreements, delegation agreements, personnel-sharing agreements or similar inter-company or other arrangements or relationships, and the Fund pays no additional fees and expenses as a result of any such arrangements.

These Participating Affiliates, like the Investment Manager, are direct or indirect subsidiaries of Ameriprise Financial and are registered with the appropriate respective regulators in their home jurisdictions and, where required, the Securities and Exchange Commission and the Commodity Futures Trading Commission in the United States.

Pursuant to some of these arrangements or relationships, certain personnel of these Participating Affiliates may serve as "associated persons" of the Investment Manager and, in this capacity, subject to the oversight and supervision of the Investment Manager and consistent with the investment objectives, policies and limitations set forth in the Fund’s prospectus and Statement of Additional Information (SAI), provide such services to the Fund.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

For the six months ended June 30, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:

	Effective rate (%)
Class A	0.14
Institutional Class	0.14
Institutional 2 Class	0.06
Institutional 3 Class	0.00
Class S	0.14

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended June 30, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, a distribution and shareholder service plan (the Plan) applicable to Class A shares, which sets the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plan, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A of the Fund. Also under the Plan, the Fund pays a monthly distribution fee to the Distributor at the maximum annual rate of 0.10% of the average daily net assets attributable to Class A shares of the Fund.

Although the Fund may pay distribution and service fees up to a maximum annual rate of 0.35% of the Fund’s average daily net assets attributable to Class A shares (comprised of up to 0.10% for distribution services and up to 0.25% for shareholder services), the Fund currently limits such fees to an aggregate fee of not more than 0.25% of the Fund’s average daily net assets attributable to Class A shares.

Sales charges

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the six months ended June 30, 2026, if any, are listed below:

	Front End (%)	CDSC (%)	Amount ($)
Class A	5.75	0.50 - 1.00 (a)	3,810

(a)	This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets:

	May 1, 2026 through April 30, 2027 (%)	Prior to May 1, 2026 (%)
Class A	1.19	1.25
Institutional Class	0.94	1.00
Institutional 2 Class	0.85	0.90
Institutional 3 Class	0.79	0.86
Class S	0.94	1.00

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At June 30, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was:

Federal tax cost ($)	Gross unrealized appreciation ($)	Gross unrealized (depreciation) ($)	Net unrealized appreciation ($)
83,028,000	51,403,000	(2,654,000 )	48,749,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $31,065,329 and $47,979,549, respectively, for the six months ended June 30, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the six months ended June 30, 2026.

Note 8. Line of credit

The Fund has access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. Pursuant to an October 23, 2025 amendment and restatement, the credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to the October 23, 2025 amendment and restatement, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A. which permitted aggregate borrowings up to $900 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended June 30, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances,

Columbia Real Estate Equity Fund | 2026

Notes to Financial Statements (continued)

June 30, 2026 (Unaudited)

such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At June 30, 2026, affiliated shareholders of record owned 27.5% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Real Estate Equity Fund | 2026

Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Real Estate Equity Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund. The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement. The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination. In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance. The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term. At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge as well as performance relative to one or more benchmarks;

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge;

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services;

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

Columbia Real Estate Equity Fund | 2026

Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years. The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight. The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026. In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs. The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved. The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks, and (iii) the net assets of the Fund. The Board observed that the Fund’s performance for certain periods ranked above median relative to its peers based on information provided by Broadridge. The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons.

The Board also considered the Investment Manager’s performance and reputation generally. After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement.

Columbia Real Estate Equity Fund | 2026

Approval of Management Agreement (continued)

(Unaudited)

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement. The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates. The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe. The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) approximated the peer universe’s median expense ratio.

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund. With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds. The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds. It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages. The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit. After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders.

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement. In reaching its conclusions, no single factor was determinative.

Columbia Real Estate Equity Fund | 2026

Approval of Management Agreement (continued)

(Unaudited)

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

Columbia Real Estate Equity Fund | 2026

[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Real Estate Equity Fund

P.O. Box 219104

Kansas City, MO 64121-9104

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR212_(08/26)

Item 8. Changes in and Disagreements with Accountants for Open-End Management Investment Companies.

Not applicable.

Item 9. Proxy Disclosures for Open-End Management Investment Companies.

Not applicable.

Item 10. Remuneration Paid to Directors, Officers, and Others of Open-End Management Investment Companies.

The fees and expenses of the independent trustees are included in “Compensation of board members” and “Deferred compensation of board members” on each Fund’s Statement of Operations as part of the Registrant’s financial statements filed under Item 7 of this Form N-CSR. Additionally, the compensation paid by the Trust to the Chief Compliance Officer is included in “Compensation of chief compliance officer” on each Fund’s Statement of Operations as part of the Registrant’s financial statements filed under Item 7 of this Form N-CSR.

Item 11. Statement Regarding Basis for Approval of Investment Advisory Contract.

Statement regarding basis for approval of Investment Advisory Contract is included in Item 7 of this Form N-CSR.

Item 12. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Not applicable.

Item 13. Portfolio Managers of Closed-End Management Investment Companies.

Not applicable.

Item 14. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

Item 15. Submission of Matters to a Vote of Security Holders.

There were no material changes to the procedures by which shareholders may recommend nominees to the registrant’s board of trustees implemented 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 Item 15 of Form N-CSR.

Item 16. Controls and Procedures.

(a) The registrant’s principal executive officer and principal financial officer, based on their evaluation of the registrant’s disclosure controls and procedures as of a date within 90 days of the filing of this report, have concluded that such controls and procedures are effective and adequately designed to ensure that information required to be disclosed by the registrant in Form N-CSR is accumulated and communicated to the registrant’s management, including the principal executive officer and principal financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

(b) There was no change in the registrant’s internal control over financial reporting that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 17. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.

Not applicable.

Item 18. Recovery of Erroneously Awarded Compensation.

Not applicable.

Item 19. Exhibits.

(a)(1) Code of ethics required to be disclosed under Item 2 of Form N-CSR. Not applicable for semiannual reports.

(a)(2) Not applicable.

(a)(3) Certifications pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) attached hereto as Exhibit 99.CERT.

(a)(4) Not applicable.

(a)(5) Not applicable.

(b) Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) attached hereto as Exhibit 99.906CERT.

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.


Columbia Funds Series Trust I

By:		/s/ Michael G. Clarke
Name:		Michael G. Clarke
Title:		President and Principal Executive Officer

Date: August 24, 2026

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:		/s/ Michael G. Clarke
Name:		Michael G. Clarke
Title:		President and Principal Executive Officer

Date: August 24, 2026


By:		/s/ Charles H. Chiesa
Name:		Charles H. Chiesa
Title:		Treasurer, Chief Financial Officer, Chief Accounting Officer and Principal Financial Officer

Date: August 24, 2026

ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

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SECTION 906 CERTIFICATION

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