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     811-09205     

 

       Advantage Advisers Xanthus Fund, L.L.C.       

(Exact name of registrant as specified in charter)

 

85 Broad Street

                          New York, NY 10004                         
(Address of principal executive offices) (Zip code)

 

Pamela Poland Chen, Esq.
Kirkland & Ellis LLP
601 Lexington Avenue
                          New York, NY 10022                          
(Name and address of agent for service)

 

Registrant's telephone number, including area code: 212-667-4225

 

Date of fiscal year end: December 31

 

Date of reporting period: June 30, 2026

 

 

 

 

 

Item 1. Reports to Stockholders.

 

(a)The Report to Shareholders is attached herewith.

 

 

TABLE OF CONTENTS
[MISSING IMAGE: lg_advantage-bw.jpg]
Advantage Advisers
Xanthus Fund, L.L.C.
Financial Statements
For the Six Months Ended June 30, 2026

TABLE OF CONTENTS​​
Advantage Advisers Xanthus Fund, L.L.C.
Financial Statements
For the Six Months Ended June 30, 2026
(Unaudited)
Contents
1
2
9
14
21
24
25
26
27
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Statement of Assets, Liabilities and Members’ Capital (Unaudited)
June 30, 2026
Assets
Investments in securities, at fair value (cost $1,799,149,058) $ 3,682,658,057
Purchased options, at fair value (cost $456,041,247) 429,803,028
Cash and cash equivalents (of which $17,648,807 is restricted cash) 63,927,686
Due from brokers (all of which is restricted cash) 917,787,403
Unrealized gain on total return swap contracts 255,983,312
Receivable for investment securities sold 93,903,945
Interest receivable 3,273,169
Dividends receivable 1,172,087
Other assets 251,958
Total assets
5,448,760,645
Liabilities
Securities sold, not yet purchased, at fair value (proceeds $1,769,087,473) 1,704,321,933
Payable for investment securities purchased 136,430,398
Withdrawals payable 112,316,790
Withdrawals payable to Special Advisory Member (see Notes 1 and 3) 1,868,252
Unrealized loss on total return swap contracts 81,087,016
Due to brokers (including Australian Dollars of $464 with a cost of  $464,
Euros of  $9,375 with a cost of  $9,375, Hong Kong Dollars of  $24,894 with a cost of  $24,894 and Japanese Yen of  $21,867,880 with a cost of  $21,867,880)
21,902,613
Dividends payable on securities sold, not yet purchased 2,131,489
Accounting and investor services fees payable 429,555
Accrued expenses 3,720,012
Total liabilities
2,064,208,058
Members’ Capital
$ 3,384,552,587
Members’ Capital
Represented by:
Net capital contributions $ 392,234,053
Total earnings (loss) 2,992,318,534
Members’ Capital
$ 3,384,552,587
The accompanying notes are an integral part of these financial statements.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Portfolio Investments (Unaudited)
Shares
June 30, 2026
Fair Value
Common Stock – 108.81%
United States – 76.23%
Aerospace / Defense – 1.52%
125,493
RTX Corp.
$    23,809,787
20,809
TransDigm Group, Inc.
27,718,420
51,528,207
Aerospace / Defense - Equipment – 0.61%
45,121
General Electric Co.
16,863,071
119,842
Standardaero, Inc.*
3,584,474
20,447,545
Applications Software – 1.17%
105,850
Microsoft Corp.
(a) 39,484,167
Building Products - Cement / Aggregate – 4.13%
284,302
CRH PLC
(a) 30,420,314
85,112
Martin Marietta Materials, Inc.
(a) 49,084,090
204,724
Vulcan Materials Co.
60,395,627
139,900,031
Chemicals - Specialty – 0.99%
376,338
Solstice Advanced Materials, Inc.*
33,343,547
Coatings / Paint – 0.45%
44,435
The Sherwin-Williams Co.
15,299,859
Commercial Services – 1.47%
56,050
Cintas Corp.
(a) 9,532,984
56,029
Quanta Services, Inc.
40,343,121
49,876,105
Commercial Services - Finance – 0.46%
26,883
S&P Global, Inc.
(a) 10,948,371
173,244
Toast, Inc., Class A*
4,819,648
15,768,019
Computer Aided Design – 4.64%
215,870
Cadence Design Systems, Inc.*
(a) 81,020,328
169,996
Synopsys, Inc.*
(a) 75,830,116
156,850,444
Computer Software – 1.81%
296,262
Twilio, Inc.
(a) 61,127,738
E-Commerce / Products – 5.28%
748,916
Amazon.com, Inc.*
(a) 178,496,639
E-Commerce / Services – 3.80%
130,579
DoorDash, Inc., Class A *
24,095,743
244,472
Expedia Group, Inc.
62,555,495
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Portfolio Investments (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
United States – (continued)
E-Commerce / Services – (continued)
582,506
Uber Technologies, Inc.*
$    42,033,633
128,684,871
Electric - Generation – 1.40%
180,384
Constellation Energy Corp.
(a) 44,801,974
140,605
X-Energy, Inc.*
2,581,508
47,383,482
Electric - Integrated – 1.58%
464,510
Entergy Corp.
(a) 53,353,619
Electronic Components - Semiconductors – 3.30%
279,979
Analog Devices, Inc.
(a) 111,199,259
Electronic Connectors – 4.08%
783,843
Amphenol Corp., Class A
138,207,198
Enterprise Software / Services – 0.46%
248,885
SS&C Technologies Holdings, Inc.
15,443,314
Finance - Credit Card – 3.62%
105,155
Mastercard, Inc., Class A
(a) 54,007,608
198,835
Visa, Inc., Class A
(a) 68,218,300
122,225,908
Finance - Other Services – 0.90%
248,414
Intercontinental Exchange, Inc.
(a) 30,582,248
Gas - Distributions – 0.66%
472,378
NiSource, Inc.
22,461,574
Independent Power Producer – 1.27%
272,026
Vistra Corp.
(a) 43,151,484
Internet Content - Entertainment – 3.86%
232,225
Meta Platforms, Inc., Class A
(a) 130,810,020
Machinery - Electric Utilities – 3.59%
282,490
BWX Technologies, Inc.
54,986,679
199,102
Vertiv Holdings Co., Class A
(a) 66,663,332
121,650,011
Medical - Drugs – 0.35%
11,229
Madrigal Pharmaceuticals, Inc.*
6,029,412
525,929
ORIC Pharmaceuticals, Inc.*
5,695,811
11,725,223
Private Equity – 0.40%
321,007
The Carlyle Group, Inc.
13,517,605
The accompanying notes are an integral part of these financial statements.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Portfolio Investments (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
United States – (continued)
REITs - Diversified – 1.43%
46,533
Equinix, Inc.
$ 48,505,534
Retail - Apparel / Shoes – 1.20%
82,487
Burlington Stores, Inc. *
(a) 26,131,882
68,333
Ross Stores, Inc.
14,544,679
40,676,561
Retail - Building Products – 0.19%
29,811
Lowe’s Cos., Inc.
6,573,027
Retail - Major Department Stores – 1.69%
378,567
The TJX Cos., Inc.
(a) 57,352,901
Retail - Restaurants – 0.39%
70,485
Chipotle Mexican Grill, Inc.*
2,396,490
68,086
Yum! Brands, Inc.
(a) 10,884,228
13,280,718
Semiconductor Equipment – 19.53%
210,985
Applied Materials, Inc.
152,542,155
461,340
KLA Corp.
(a) 139,190,891
394,274
Lam Research Corp.
(a) 170,850,752
148,649
MKS, Inc.
66,119,075
272,288
Teradyne, Inc.
(a) 131,743,826
660,446,699
Total United States (Cost $1,201,506,168) $  2,579,353,557
Australia - 0.15%
Metal - Diversified – 0.15%
413,778
Lynas Rare Earths, Ltd.
5,177,177
Total Australia (Cost $4,414,812) $ 5,177,177
Canada – 0.73%
Transport - Rail – 0.73%
286,766
Canadian Pacific Kansas City, Ltd.
(a) 24,848,274
Total Canada (Cost $22,070,275) $ 24,848,274
China – 1.58%
Auto - Cars / Light Trucks – 0.46%
1,680,800
BYD Co., Ltd., Class H
15,528,333
E-Commerce / Products – 0.47%
169,267
Alibaba Group Holding, Ltd. – Sponsored ADR
16,246,247
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Portfolio Investments (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
China – (continued)
Schools – 0.33%
241,967
New Oriental Education & Technology Group, Inc. – 
Sponsored ADR
$    11,108,705
Transport - Services – 0.32%
1,321,670
Full Truck Alliance Co., Ltd. – Sponsored ADR
10,731,960
Total China (Cost $65,349,729) $ 53,615,245
Finland – 1.98%
Networking Products – 1.98%
5,034,094
Nokia Oyj – Sponsored ADR
66,852,768
Total Finland (Cost $62,437,746) $ 66,852,768
France – 7.08%
Aerospace / Defense - Equipment – 7.08%
398,839
Airbus SE
88,708,806
382,810
Safran SA
150,995,002
Total France (Cost $102,155,847) $ 239,703,808
Germany – 5.65%
Aerospace / Defense – 0.67%
54,530
MTU Aero Engines AG
22,687,036
Athletic Footwear – 0.54%
89,659
adidas AG
18,389,780
Electronic Components - Semiconductors – 0.58%
210,984
Infineon Technologies AG
19,700,275
Machinery - Electric Utilities – 3.86%
688,511
Siemens Energy AG
130,513,553
Total Germany (Cost $68,126,301) $ 191,290,644
Hong Kong – 0.23%
Casino Hotels – 0.23%
2,055,000
Galaxy Entertainment Group, Ltd.
7,709,477
Total Hong Kong (Cost $10,448,569) $ 7,709,477
Japan – 6.19%
Audio / Video Products – 1.36%
2,287,700
Sony Group Corp.
46,169,242
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Portfolio Investments (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
Japan – (continued)
Chemicals - Diversified – 1.75%
381,600
Resonac Holdings Corp.
$ 41,558,653
407,100
Shin-Etsu Chemical Co., Ltd.
17,553,957
59,112,610
Electronic Components - Semiconductors – 3.08%
189,000
Kioxia Holdings Corp.*
104,288,694
Total Japan (Cost $114,192,508) $ 209,570,546
Sweden – 0.38%
Internet Content - Entertainment – 0.38%
28,131
Spotify Technology SA
12,915,786
Total Sweden (Cost $14,044,723) $ 12,915,786
Taiwan – 7.05%
Electronic Components - Semiconductors – 0.97%
98,558
Silicon Motion Technology Corp. – Sponsored ADR
32,852,338
Semiconductor Components - Integrated Circuits – 6.08%
431,039
Taiwan Semiconductor Manufacturing Co., Ltd. – 
Sponsored ADR
205,851,295
Total Taiwan (Cost $99,524,787) $ 238,703,633
United Kingdom – 0.85%
Electronic Components - Miscellaneous – 0.85%
169,815
nVent Electric PLC
28,802,322
Total United Kingdom (Cost $28,342,231) $ 28,802,322
Uruguay – 0.71%
E-Commerce / Services – 0.71%
14,207
MercadoLibre, Inc.*
(a) 24,114,820
Total Uruguay (Cost $6,535,362) $ 24,114,820
Total Common Stock (Cost $1,799,149,058) $ 3,682,658,057
Total Investments in Securities
(Cost $1,799,149,058) – 108.81%
$ 3,682,658,057
Total Purchased Options (Cost $456,041,247) – 12.70% 429,803,028
Total Securities Sold, Not Yet Purchased (Proceeds
$1,769,087,473) – (50.36)%
(1,704,321,933)
Other Assets, in Excess of Liabilities – 28.85%** 976,413,435
Members’ Capital – 100.00% $ 3,384,552,587
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Portfolio Investments (Unaudited) (continued)
(a)
Partially or wholly held in a pledge account at the Bank of New York Mellon (“Custodian”), the assets of which are pledged as collateral for securities sold, not yet purchased.
*
Non-income producing security
**
Includes $63,927,686 invested in U.S. Dollar Cash Reserve Account held by the Custodian, which is 1.89% of Members’ Capital. $17,648,807 of that amount is held as restricted cash and are in a segregated account with the Custodian, as collateral for swap contracts and securities sold short, not yet purchased, in each case as at June 30, 2026.
ADR
American Depository Receipt
REIT
Real Estate Investment Trust
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Portfolio Investments (Unaudited) (concluded)
Investments in Securities – By Industry
June 30, 2026
Percentage of
Members’ Capital
(%)
Aerospace / Defense 2.19
Aerospace / Defense - Equipment 7.69
Applications Software 1.17
Athletic Footwear 0.54
Audio / Video Products 1.36
Auto - Cars / Light Trucks 0.46
Building Products - Cement / Aggregate 4.13
Casino Hotels 0.23
Chemicals - Diversified 1.75
Chemicals - Specialty 0.99
Coatings / Paint 0.45
Commercial Services 1.47
Commercial Services - Finance 0.46
Computer Aided Design 4.64
Computer Software 1.81
E-Commerce / Products 5.75
E-Commerce / Services 4.51
Electric - Generation 1.40
Electric - Integrated 1.58
Electronic Components - Miscellaneous 0.85
Electronic Components - Semiconductors 7.93
Electronic Connectors 4.08
Investments in Securities – By Industry
June 30, 2026
Percentage of
Members’ Capital
(%)
Enterprise Software / Services 0.46
Finance - Credit Card 3.62
Finance - Other Services 0.90
Gas - Distributions 0.66
Independent Power Producer 1.27
Internet Content - Entertainment 4.24
Machinery - Electric Utilities 7.45
Medical - Drugs 0.35
Metal - Diversified 0.15
Networking Products 1.98
Private Equity 0.40
REITs - Diversified 1.43
Retail - Apparel / Shoes 1.20
Retail - Building Products 0.19
Retail - Major Department Stores 1.69
Retail - Restaurants 0.39
Schools 0.33
Semiconductor Components - Integrated Circuits
6.08
Semiconductor Equipment 19.53
Transport - Rail 0.73
Transport - Services 0.32
Total Investments in Securities 108.81%
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Purchased Options (Unaudited)
Notional
Amount (USD)
Contracts
Expiration
Date
Strike Price
June 30,
2026
Fair Value
Purchased Options – 12.70%
Equity Options – 12.68%
Equity Call Options – 9.52%
United States – 7.64%
Applications Software – 0.13%
$ 107,250,000
2,750
8/21/2026
$390
Microsoft Corp.
$  4,530,625
Auto-Cars / Light Trucks – 0.17%
79,926,000
1,903
8/21/2026
$420
Tesla, Inc.
5,813,665
Casino Hotels – 0.09%
10,695,000
2,139
9/18/2026
$50
Las Vegas Sands Corp.
386,090
20,925,000
2,325
9/18/2026
$90
Wynn Resorts, Ltd.
2,638,875
3,024,965
Computers – 0.23%
120,042,000
4,212
9/18/2026
$285
Apple, Inc.
7,718,490
E-Commerce / Products – 0.12%
30,932,000
1,406
9/18/2026
$220
Amazon.com, Inc.
4,073,885
E-Commerce / Services – 0.73%
70,838,880
4,362
10/16/2026
$162.40
Booking Holdings, Inc.
11,515,680
42,224,000
2,912
9/18/2026
$145
DoorDash, Inc., Class A
13,286,000
24,801,680
Electronic Components - Semiconductors – 5.19%
107,198,000
2,821
8/21/2026
$380
Advanced Micro Devices, Inc.
59,452,574
149,732,000
3,652
10/16/2026
$410
Broadcom, Inc.
11,038,170
95,998,500
9,846
9/18/2026
$97.50
Intel Corp.
47,679,255
113,887,500
15,185
9/18/2026
$75
Microchip Technology, Inc.
31,281,100
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Purchased Options (Unaudited) (continued)
Notional
Amount (USD)
Contracts
Expiration
Date
Strike Price
June 30,
2026
Fair Value
Purchased Options – (continued)
Equity Options – (continued)
Equity Call Options – (continued)
United States – (continued)
Electronic Components -
Semiconductors – (continued)
$ 13,149,500
1,547
9/18/2026
$85
Microchip Technology, Inc.
$ 2,227,680
214,662,000
11,298
9/18/2026
$190
NVIDIA Corp.
24,149,475
175,828,254
Enterprise Software /​
Services – 0.06%
109,321,500
7,053
9/18/2026
$155
Palantir Technologies, Inc.
2,038,317
Hotels & Motels – 0.41%
50,010,000
1,667
9/18/2026
$300
Hilton Worldwide Holdings, Inc.
6,701,340
45,804,000
1,388
9/18/2026
$330
Marriott International Inc., Class A
6,960,820
13,662,160
Telecommunication Equipment
Fiber Optics – 0.51%
20,076,000
1,434
9/18/2026
$140
Corning, Inc.
17,254,605
Total United States (Cost $258,253,074) $ 258,746,646
Canada – 0.41%
Internet Application Software – 0.41%
9/18/2026
63,470,000
6,347
$100
Shopify, Inc.
13,804,725
Total Canada (Cost $12,268,897) $ 13,804,725
Taiwan – 0.59%
Semiconductor Components – Integrated
Circuits – 0.59%
83,800,000
2,095
9/18/2026
$400
Taiwan Semiconductor Manufacturing Co.,
Ltd. –  Sponsored ADR
20,002,013
Total Taiwan (Cost $17,457,983) $ 20,002,013
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Purchased Options (Unaudited) (continued)
Notional
Amount (USD)
Contracts
Expiration
Date
Strike Price
June 30,
2026
Fair Value
Purchased Options – (continued)
Equity Options – (continued)
Equity Call Options – (continued)
United Kingdom – 0.88%
Electronic Components - Semiconductors – 0.88%
8/21/2026
$ 50,031,000
1,853
$270
ARM Holdings PLC
$ 19,072,003
8/21/2026
38,010,000
1,267
$300
ARM Holdings PLC
10,623,795
Total United Kingdom (Cost $25,658,992) $ 29,695,798
Total Equity Call Options (Cost $313,638,946)
$ 322,249,182
Equity Put Options – 3.16%
United States – 3.16%
Applications Software – 0.19%
8/21/2026
50,232,000
1,196
$420
Microsoft Corp.
6,356,740
Growth & Income - Large Cap – 0.66%
9/18/2026
812,098,000
12,212
$665
SPDR S&P 500 ETF Trust
5,318,326
12/18/2026
1,043,790,000
15,815
$660
SPDR S&P 500 ETF Trust
16,803,437
22,121,763
Sector Fund - Technology – 1.97%
12/18/2026
1,629,210,000
24,685
$660
Invesco QQQ Trust Series 1
55,430,167
12/18/2026
287,776,000
4,232
$680
Invesco QQQ Trust Series 1
11,530,084
66,960,251
Semiconductor Equipment – 0.34%
9/18/2026
59,136,000
2,640
$224
KLA Corp.
3,946,800
9/18/2026
107,610,000
3,165
$340
Lam Research, Corp.
7,493,138
11,439,938
Total United States (Cost $141,499,850) $ 106,878,692
Total Equity Put Options (Cost $141,499,850) $ 106,878,692
Total Equity Options (Cost $455,138,796) $ 429,127,874
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Purchased Options (Unaudited) (continued)
Notional
Amount (USD)
Contracts
Expiration
Date
Strike Price
June 30,
2026
Fair Value
Purchased Options – (continued)
Currency Put Options – 0.02%
United States – 0.02%
12/18/2026
$ 1,695,690
30,012,220
$5.65
USD-BRL
$ 674,279
12/18/2026
2,197,622
29,498,281
$7.45
USD-CNH
875
Total United States (Cost $902,451) $ 675,154
Total Currency Put Options (Cost $902,451) $ 675,154
Total Purchased Options (Cost $456,041,247) $ 429,803,028
ADR
American Depository Receipt
BRL
Brazilian Real
CNH
Chinese Renminbi Yuan
ETF
Exchange-Traded Fund
SPDR
Standard & Poor’s Depository Receipt
USD
United States Dollar
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Purchased Options (Unaudited) (concluded)
   
Purchased Options – By Industry
June 30, 2026
Percentage of
Members’ Capital
(%)
Applications Software 0.32
Auto - Cars / Light Trucks 0.17
Casino Hotels 0.09
Computers 0.23
Currency 0.02
E-Commerce / Products 0.12
E-Commerce / Services 0.73
Electronic Components - Semiconductors 6.07
Purchased Options – By Industry
June 30, 2026
Percentage of
Members’ Capital
(%)
Enterprise Software / Services 0.06
Growth & Income - Large Cap 0.66
Hotels & Motels 0.41
Internet Application Software 0.41
Sector Fund - Technology 1.97
Semiconductor Components - Integrated Circuits
0.59
Semiconductor Equipment 0.34
Telecommunication Equipment Fiber Optics 0.51
Total Purchased Options 12.70%
The accompanying notes are an integral part of these financial statements.
-13-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Securities Sold, Not Yet Purchased (Unaudited)
Shares
June 30, 2026
Fair Value
Securities Sold, Not Yet Purchased – 50.36%
Common Stock – 50.36%
United States – 37.95%
Advertising Agencies – 0.56%
260,393
Omnicom Group, Inc.
$    18,964,422
Appliances – 0.22%
192,790
Whirlpool Corp.
7,599,782
Applications Software – 0.09%
56,144
Elastic NV*
3,201,331
Auto - Cars / Light Trucks – 1.49%
119,558
Tesla, Inc.*
50,286,094
Beverages - Non-Alcoholic – 0.19%
66,747
Monster Beverage Corp.*
6,415,722
Brewery – 0.64%
98,781
Constellation Brands, Inc.
13,739,449
196,503
Molson Coors Beverage Co.
7,655,757
21,395,206
Cable / Satellite TV – 0.47%
112,151
Charter Communications, Inc., Class A*
15,948,994
Cellular Telecommunications – 0.85%
172,344
T-Mobile US, Inc.
28,907,259
Commercial Banks – 0.94%
810,470
Regions Financial Corp.
24,476,194
352,638
Valley National Bancorp.
5,166,147
48,575
Bank OZK
2,530,272
32,172,613
Commercial Services - Finance – 1.31%
215,589
Global Payments, Inc.
15,643,138
299,809
H&R Block, Inc.
11,416,727
398,280
PayPal Holdings, Inc.*
17,197,730
44,257,595
Computer Data Security – 1.30%
105,955
Fortinet, Inc.*
16,276,807
87,105
Qualys, Inc.*
11,976,066
89,809
Rapid7, Inc.*
727,453
144,458
Tenable Holdings, Inc.*
5,327,611
70,628
Zscaler, Inc.
9,969,142
44,277,079
Computer Graphics – 0.28%
527,462
Figma, Inc.*
9,541,788
Computer Services – 0.49%
148,779
Cognizant Technology Solutions Corp., Class A
5,762,211
84,617
Gartner, Inc.*
10,968,056
16,730,267
The accompanying notes are an integral part of these financial statements.
-14-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Securities Sold, Not Yet Purchased (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
United States – (continued)
Computer Software – 0.32%
272,361
Dropbox, Inc., Class A*
$ 7,481,757
35,264
SentinelOne, Inc.*
598,430
79,449
Teradata Corp.*
2,752,908
10,833,095
Consumer Products - Miscellaneous – 0.23%
70,106
Kimberly-Clark Corp.
7,695,536
Cosmetics & Toiletries – 0.41%
94,643
Procter & Gamble Co.
13,878,450
Data Processing / Management – 0.49%
13,831
Fair Isaac Corp.*
16,525,002
Diversified Manufacturing Operations – 1.25%
156,410
Illinois Tool Works, Inc.
42,304,213
E-Commerce / Products – 0.32%
144,909
Etsy, Inc.*
10,915,995
Electric Products - Miscellaneous – 0.91%
214,262
Emerson Electric Co.
30,671,605
Electronic Components - Miscellaneous – 1.10%
71,477
Hubbell Inc.
37,396,766
Electronic Components - Semiconductors – 6.40%
42,268
Advanced Micro Devices, Inc.*
24,553,904
449,469
Broadcom, Inc.
169,786,914
232,083
ON Semiconductor Corp.*
21,941,127
  216,281,945
Electronic Forms – 0.60%
98,404
Adobe, Inc.*
20,174,788
Enterprise Software / Services – 1.13%
326,371
Palantir Technologies, Inc.*
38,077,705
E-Services / Consulting – 0.20%
49,126
CDW Corp.
6,909,081
Finance - Credit Card – 0.25%
42,063
Capital One Financial Corp.
8,438,679
Food - Miscellaneous / Diversified – 1.25%
453,790
Campbell Soup Co.
10,105,903
215,922
Conagra Brands, Inc.
2,906,310
459,335
General Mills, Inc.
15,984,858
563,633
The Kraft Heinz Co.
13,313,011
42,310,082
Hotels & Motels – 0.93%
211,138
Choice Hotels International, Inc.
23,282,187
97,549
Wyndham Hotels & Resorts, Inc.
8,214,601
31,496,788
The accompanying notes are an integral part of these financial statements.
-15-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Securities Sold, Not Yet Purchased (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
United States – (continued)
Insurance Brokers – 0.33%
67,707
Marsh & McLennan Cos., Inc.
$ 11,284,726
Investment Management / Advisory Services – 1.48%
266,113
Franklin Resources, Inc.
8,853,580
360,230
T. Rowe Price Group, Inc.
40,954,549
49,808,129
Machinery - Electric Utilities – 3.42%
98,460
GE Vernova, Inc.
115,676,715
Medical - Biomedical / Genetics – 0.38%
35,418
Amgen, Inc.
12,825,566
Medical - Drugs – 0.59%
78,323
Johnson & Johnson
19,891,692
Private Equity – 0.83%
239,116
Blackstone, Inc.
28,136,780
REITs - Office Property – 0.68%
126,253
Brandywine Realty Trust
400,222
115,549
BXP, Inc.
7,662,054
538,452
Douglas Emmett, Inc.
6,353,734
14,598
Hudson Pacific Properties, Inc.
221,744
121,579
Kilroy Realty Corp.
4,555,565
70,665
SL Green Realty Corp.
3,658,327
22,851,646
REITs - Storage – 1.08%
98,702
Extra Space Storage, Inc.
14,341,401
70,097
Public Storage
22,312,576
36,653,977
Retail - Home Furnishings – 0.14%
209,892
Bath & Body Works, Inc.
4,854,802
Retail - Miscellaneous / Diversified – 0.12%
278,261
Sally Beauty Holdings, Inc.*
3,934,611
Retail - Regional Department Stores – 0.54%
408,790
Kohl’s Corp.
7,243,759
478,796
Macy’s, Inc.
11,275,646
18,519,405
Semiconductor Equipment – 3.07%
158,239
VanEck Semiconductor ETF
103,787,377
Telephone - Integrated – 0.31%
508,777
AT&T, Inc.
10,531,684
Transport - Services – 0.36%
111,942
United Parcel Service, Inc.
12,033,765
Total United States (Proceeds $1,348,897,450) $ 1,284,398,757
The accompanying notes are an integral part of these financial statements.
-16-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Securities Sold, Not Yet Purchased (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
Belgium – 0.24%
Brewery – 0.24%
98,251
Anheuser-Busch InBev SA/NV ADR
$ 8,095,882
Total Belgium (Proceeds $6,002,734) $ 8,095,882
Canada – 2.16%
Apparel Manufacturers – 0.04%
25,890
Gildan Activewear, Inc.
1,335,924
Enterprise Software / Services – 0.08%
114,707
Open Text Corp.
2,540,760
Internet Application Software – 1.79%
530,978
Shopify, Inc.
60,627,067
Medical - Drugs – 0.00%
5,010
Canopy Growth Corp.*
4,760
Private Equity – 0.25%
205,344
Brookfield Corp.
8,745,601
Total Canada (Proceeds $87,906,950) $    73,254,112
China – 1.07%
Auto - Cars / Light Trucks – 0.28%
638,025
NIO, Inc. - Sponsored ADR*
3,228,407
454,765
XPeng, Inc. - Sponsored ADR*
6,021,089
9,249,496
Internet Content - Information / Network – 0.44%
362,272
Bilibili, Inc. - Sponsored ADR*
6,169,492
1,680,800
Kuaishou Technology
8,916,199
15,085,691
Retail - Drug Stores – 0.02%
664,645
Ping An Healthcare and Technology Co., Ltd.
591,583
Wireless Equipment – 0.33%
4,089,000
Xiaomi Corp., Class A*
11,283,524
Total China (Proceeds $51,338,076) $ 36,210,294
France – 0.82%
Computer Services – 0.44%
144,816
Capgemini SE
14,563,373
Cosmetics & Toiletries – 0.18%
14,106
L’Oreal SA
6,187,273
Power Conversion / Supply Equipment – 0.20%
21,157
Schneider Electric SE
6,903,483
Total France (Proceeds $36,135,198) $ 27,654,129
The accompanying notes are an integral part of these financial statements.
-17-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Securities Sold, Not Yet Purchased (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
Germany – 0.35%
Auto - Cars / Light Trucks – 0.22%
112,526
Bayerische Motoren Werke AG
$ 7,366,555
Enterprise Software / Services – 0.13%
28,211
SAP SE - Sponsored ADR
4,347,597
Total Germany (Proceeds $13,975,899) $    11,714,152
Hong Kong – 0.11%
Electric - Integrated – 0.11%
523,000
Power Assets Holdings, Ltd.
3,808,099
Total Hong Kong (Proceeds $3,529,239) $ 3,808,099
Ireland – 1.66%
Computer Services – 0.27%
72,489
Accenture PLC, Class A
9,020,531
Electronic Components - Miscellaneous – 0.34%
56,402
TE Connectivity PLC
11,371,207
Power Conversion / Supply Equipment – 1.05%
83,880
Eaton Corp. PLC
35,742,946
Total Ireland (Proceeds $66,636,396) $ 56,134,684
Israel – 0.43%
Applications Software – 0.06%
28,195
Monday.com, Ltd.*
2,041,036
Auto / Truck Parts & Equipment - Original – 0.08%
270,647
Mobileye Global, Inc., Class A*
2,619,863
Computer Data Security – 0.29%
75,794
Check Point Software Technologies, Ltd.*
9,961,605
Total Israel (Proceeds $23,841,638) $ 14,622,504
Italy – 0.72%
Auto - Cars / Light Trucks – 0.72%
65,467
Ferrari NV
24,372,709
Total Italy (Proceeds $26,563,842) $ 24,372,709
Netherlands – 0.07%
Auto - Cars / Light Trucks – 0.07%
423,166
Stellantis NV
2,428,973
Total Netherlands (Proceeds $3,985,253) $ 2,428,973
Switzerland – 0.54%
Computer - Peripheral Equipment – 0.20%
70,881
Logitech International SA
6,665,649
Medical - Drugs – 0.34%
73,012
Novartis AG - Sponsored ADR
11,442,441
Total Switzerland (Proceeds $15,691,941) $ 18,108,090
The accompanying notes are an integral part of these financial statements.
-18-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Securities Sold, Not Yet Purchased (Unaudited) (continued)
Shares
June 30, 2026
Fair Value
Common Stock – (continued)
United Kingdom – 4.24%
Beverages - Wine / Spirits – 0.45%
189,485
Diageo PLC
$ 15,230,804
Electronic Components - Semiconductors – 3.79%
361,815
ARM Holdings PLC - Sponsored ADR*
128,288,744
Total United Kingdom (Proceeds $84,582,857) $ 143,519,548
Total Common Stock (Proceeds $1,769,087,473) $ 1,704,321,933
Total Securities Sold, Not Yet Purchased
(Proceeds $1,769,087,473)
$ 1,704,321,933
*
Non-income producing security
ADR
American Depository Receipt
ETF
Exchange-Traded Fund
REIT
Real Estate Investment Trust
The accompanying notes are an integral part of these financial statements.
-19-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Schedule of Securities Sold, Not Yet Purchased (Unaudited) (concluded)
Securities Sold, Not Yet Purchased – 
By Industry
June 30, 2026
Percentage of
Members’ Capital
(%)
Advertising Agencies 0.56
Apparel Manufacturers 0.04
Appliances 0.22
Applications Software 0.15
Auto / Truck Parts & Equipment ‑ Original
0.08
Auto - Cars / Light Trucks 2.78
Beverages - Non-Alcoholic 0.19
Beverages - Wine / Spirits 0.45
Brewery 0.88
Cable / Satellite TV 0.47
Cellular Telecommunications 0.85
Commercial Banks 0.94
Commercial Services - Finance 1.31
Computer Data Security 1.59
Computer Graphics 0.28
Computer Services 1.20
Computer Software 0.32
Computer - Peripheral Equipment 0.20
Consumer Products - Miscellaneous 0.23
Cosmetics & Toiletries 0.59
Data Processing / Management 0.49
Diversified Manufacturing Operations 1.25
E-Commerce / Products 0.32
Electric Products - Miscellaneous 0.91
Electric - Integrated 0.11
Electronic Components - Miscellaneous 1.44
Electronic Components - Semiconductors
10.19
Securities Sold, Not Yet Purchased – 
By Industry
June 30, 2026
Percentage of
Members’ Capital
(%)
Electronic Forms 0.60
Enterprise Software / Services 1.34
E-Services / Consulting 0.20
Finance - Credit Card 0.25
Food - Miscellaneous / Diversified 1.25
Hotels & Motels 0.93
Insurance Brokers 0.33
Internet Application Software 1.79
Internet Content - Information / Network 0.44
Investment Management / Advisory Services
1.48
Machinery - Electric Utilities 3.42
Medical - Biomedical / Genetics 0.38
Medical - Drugs 0.93
Power Conversion / Supply Equipment 1.25
Private Equity 1.08
REITs - Office Property 0.68
REITs - Storage 1.08
Retail - Drug Stores 0.02
Retail - Home Furnishings 0.14
Retail - Miscellaneous / Diversified 0.12
Retail - Regional Department Stores 0.54
Semiconductor Equipment 3.07
Telephone - Integrated 0.31
Transport - Services 0.36
Wireless Equipment 0.33
Total Securities Sold, Not Yet Purchased
50.36%
The accompanying notes are an integral part of these financial statements.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
   

Schedule of Swap Contracts (Unaudited)
Industry
Reference Company
Counterparty
Expiration
Date
Trade Date
Spread*
Payment
Frequency
Number of
Contracts
Long/​
(Short)*****
Notional
Amount
Unrealized
Gain**
Swap Contracts – 5.17%
Total Return Swap Contracts - Unrealized Gain – 7.57%
United States – 4.84%
Private Equity
The Carlyle Group,
Inc.
Morgan Stanley
06/03/2027
11/16/2017
+0.45%
Termination
503,933 $ 9,271,574 $ 13,892,033
Web Portals / ISP
Alphabet, Inc.,
Class A
Morgan Stanley
06/03/2027
07/08/2011
+0.45%
Termination
476,287 15,087,361 149,911,887
Total United States $ 24,358,935 $ 163,803,920
Japan – 0.26%
Audio / Video Products
Sharp Corp.
Morgan Stanley
12/24/2026
08/03/2012
-0.40%
Termination
(1,047,900) (9,745,536) 6,968,766
Office Automation &
Equipment
Canon, Inc.
Morgan Stanley
12/24/2026
03/31/2020
-0.40%
Termination
(1,025,100) (27,554,989) 1,681,824
Office Automation &
Equipment
Ricoh Co., Ltd.
Morgan Stanley
12/24/2026
05/24/2012
-0.40%
Termination
(836,200) (7,290,698) 162,145
Total Japan $ (44,591,223) $ 8,812,735
South Korea – 0.03%
Engine-Internal Combustion
Doosan Corp.
Morgan Stanley
03/01/2028
02/25/2026
+0.90%
Termination
30,947 28,560,513 865,570
Total South Korea $ 28,560,513 $ 865,570
Spain – 0.06%
Building - Heavy Construction
Cellnex Telecom SA
Morgan Stanley
01/04/2027
05/06/2015
+0.65%
Termination
252,566 4,132,788 2,105,753
Total Spain $ 4,132,788 $ 2,105,753
Sweden – 0.04%
Auto - Cars/Light Trucks
Volvo Car AB,
Class B
Morgan Stanley
01/04/2027
10/24/2022
-2.50%
Termination
(856,116) (2,764,153) $ 1,240,994
Total Sweden $ (2,764,153) $ 1,240,994
Taiwan – 0.56%
Power Conversion /​ Supply
Equipment
Delta Electronics,
Inc.
Morgan Stanley
01/27/2027
06/14/2023
+1.25%
Termination
374,000 3,650,420 18,895,582
Total Taiwan $ 3,650,420 $ 18,895,582
United Kingdom – 1.78%
Aerospace / Defense
Rolls-Royce
Holdings PLC
Morgan Stanley
12/16/2026
05/28/2024
+0.65%
Termination
4,752,322 28,976,904 59,923,887
Food - Retail
Marks & Spencer
Group PLC
Morgan Stanley
12/16/2026
02/16/2016
-0.30%
Termination
(864,523) (4,396,640) 334,871
Total United Kingdom $ 24,580,264 $ 60,258,758
Total Return Swap Contracts -
Unrealized Gain***
$ 37,927,544 $ 255,983,312
The accompanying notes are an integral part of these financial statements.
-21-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
   

Schedule of Swap Contracts (Unaudited) (continued)
Industry
Reference Company
Counterparty
Expiration
Date
Trade Date
Spread*
Payment
Frequency
Number of
Contracts
Long/​
(Short)*****
Notional
Amount
Unrealized
Loss**
Swap Contracts – (continued)
Total Return Swap Contracts - Unrealized Loss – (2.40%)
Australia – (0.09%)
Commercial Banks Non-US
Commonwealth
Bank of Australia
Morgan Stanley
12/29/2026
02/24/2016
-0.40%
Termination
(296,216) $ (30,535,555) $ (3,146,884)
Total Australia $ (30,535,555) $ (3,146,884)
Brazil – (0.01%)
Finance - Other Services
B3 SA-Brasil Bolsa
Balcao
Morgan Stanley
02/01/2029
01/30/2019
+1.00%
Termination
4,501,200 12,123,282 (494,491)
Total Brazil $ 12,123,282 $ (494,491)
Denmark – (0.18%)
Transport - Services
DSV A/S
Morgan Stanley
01/04/2027
12/29/2025
+0.65%
Termination
141,055 39,111,122 (6,239,101)
Total Denmark $ 39,111,122 $ (6,239,101)
Italy – (0.02%)
Wire & Cable Products
Prysmian SpA
Morgan Stanley
01/04/2027
05/06/2026
+0.65%
Termination
56,422 9,913,682 (551,786)
Total Italy $ 9,913,682 $ (551,786)
Japan – (1.87%)
Semiconductor Equipment
Advantest Corp.
Morgan Stanley
12/24/2026
08/26/2011
-0.40%
Termination
(576,400) (93,573,214) (20,210,471)
Semiconductor Equipment
Tokyo Electron, Ltd.
Morgan Stanley
12/24/2026
11/10/2020
-0.40%
Termination
(162,500) (34,053,070) (42,729,157)
Total Japan $ (127,626,284) $ (62,939,628)
Taiwan – (0.14%)
Audio / Video Products
Lite-On Technology
Corp.
Morgan Stanley
01/27/2027
05/07/2026
+1.25%
Termination
2,439,000 18,289,912 (1,372,320)
Computers - Peripheral
Equipment
Innolux Display
Corp.
Morgan Stanley
01/27/2027
03/18/2010
-4.00%
Termination
(1,402,000) (1,097,724) (1,934,779)
Electronic Components -
Miscellaneous
AUO Corp.
Morgan Stanley
01/27/2027
07/26/2012
-16.00%
Termination
(2,649,200) (1,838,231) (1,336,242)
Total Taiwan $ 15,353,957 $ (4,643,341)
United Kingdom – (0.09%)
Aerospace / Defense
Bae Systems PLC
Morgan Stanley
12/16/2026
02/19/2026
+0.65%
Termination
496,743 14,505,280 (2,407,962)
Cosmetics & Toiletries
Unilever PLC
Morgan Stanley
01/04/2027
12/23/2019
-0.35%
Termination
(259,898) (15,106,284) (663,823)
Total United Kingdom $ (601,004) $ (3,071,785)
Total Return Swap Contracts -
Unrealized Loss****
$ (82,260,800) $ (81,087,016)
Total Swap Contracts - net $ (44,333,256) $ 174,896,296
*
The financing rate is based on the Daily Fed Funds Effective Rate of 3.63% +/- the Spread. The financing rate is variable and the rate is indicated as of June 30, 2026.
**
The fair value of the Total Return Swap Contracts is the same as the unrealized gain/(loss). For this reason, fair value has not been separately shown. Additionally, there were no upfront payments or receipts related to any of the Total Return Swap Contracts.
***
Includes all Total Return Swap Contracts in a gain position. The unrealized gain on these contracts are included as part of unrealized gain on Total Return Swap Contracts in the Statement of Assets, Liabilities, and Members’ Capital.
****
Includes all Total Return Swap Contracts in a loss position. The unrealized loss on these contracts are included as part of unrealized loss on Total Return Swap Contracts in the Statement of Assets, Liabilities, and Members’ Capital.
*****
The Company is the receiver of the total returns of the underlying shares for long contracts and delivers the total returns of the underlying shares for short contracts.
The accompanying notes are an integral part of these financial statements.
-22-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
   

Schedule of Swap Contracts (Unaudited) (concluded)
Swap Contracts – By Industry
June 30, 2026
Percentage of Members’
Capital
(%)
Aerospace / Defense 1.70
Audio / Video Products 0.17
Auto - Cars / Light Trucks 0.04
Building - Heavy Construction 0.06
Commercial Banks Non-US (0.09)
Computers - Peripheral Equipment (0.06)
Cosmetics & Toiletries (0.02)
Electronic Components - Miscellaneous
(0.04)
Engine - Internal Combustion 0.03
Swap Contracts – By Industry
June 30, 2026
Percentage of Members’
Capital
(%)
Finance - Other Services (0.01)
Food - Retail 0.01
Office Automation & Equipment 0.05
Power Conversion / Supply Equipment 0.56
Private Equity 0.41
Semiconductor Equipment (1.87)
Transport - Services (0.18)
Web Portals / ISP 4.43
Wire & Cable Products (0.02)
Total in Swap Contracts 5.17%
The accompanying notes are an integral part of these financial statements.
-23-

TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.

Statement of Operations (Unaudited)
Six Months Ended
June 30, 2026
Investment income
Interest
$ 18,008,090
Dividends (net of withholding taxes of $1,547,247)
13,024,641
Total investment income
31,032,731
Expenses
Administration fees
21,452,596
Prime broker fees
16,924,543
Dividends on securities sold, not yet purchased
14,603,050
Advisor fees
6,356,325
Interest expense
1,014,878
Accounting and investor services fees
834,103
Custodian fees
347,962
Legal fees
337,601
Board of Managers’ fees and expenses
266,416
Audit and tax fees
225,522
Insurance expense
85,052
Printing expense
47,109
Miscellaneous
471,629
Total operating expenses
62,966,786
Net investment loss
(31,934,055)
Net realized and net change in unrealized gain/(loss) on investments in securities, securities sold, not yet purchased, purchased options, foreign currency transactions, and swap contracts
Net realized gain/(loss) on investments in securities, securities sold, not yet purchased,
purchased options, foreign currency transactions and swap contracts
Net realized gain on investments in securities
418,790,772
Net realized gain on swap contracts
43,199,432
Net realized gain on purchased options
12,495,166
Net realized loss on foreign currency transactions
(326,845)
Net realized loss on securities sold, not yet purchased
(197,447,091)
Total net realized gain/(loss) on investments in securities, securities sold, not
yet purchased, purchased options, foreign currency transactions, and swap
contracts
276,711,434
Net change in unrealized gain/(loss) on investments in securities, securities sold, not yet purchased, purchased options, foreign currency transactions and swap contracts
Net change in unrealized gain/(loss) on investments in securities
367,733,792
Net change in unrealized gain/(loss) on foreign currency transactions
(30,078)
Net change in unrealized gain/(loss) on securities sold, not yet purchased
(40,555,429)
Net change in unrealized gain/(loss) on purchased options
(50,306,590)
Net change in unrealized gain/(loss) on swap contracts
(89,054,572)
Total net change in unrealized gain/(loss) on investments in securities, securities sold, not yet purchased, purchased options, foreign currency transactions and swap contracts
187,787,123
Net realized gain and net change in unrealized gain/(loss) on investments in securities, securities sold, not yet purchased, purchased options, foreign currency transactions, and swap contracts
464,498,557
Net increase in Members’ Capital resulting from operations
$ 432,564,502
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Statements of Changes in Members’ Capital (Unaudited)
Special
Advisory
Member
Members
Total
MEMBERS’ CAPITAL, December 31, 2024
$    — $ 2,467,004,131 $ 2,467,004,131
From investment activities
Net investment loss
$      — $ (45,941,167) $ (45,941,167)
Net realized gain on investments in securities, securities sold, not yet purchased, purchased options, foreign currency transactions, and swap contracts
223,569,340 223,569,340
Net change in unrealized gain/(loss) on investments in
securities, securities sold, not yet purchased, purchased
options, foreign currency transactions and swap
contracts
639,978,502 639,978,502
Incentive allocation
64,122,129 (64,122,129)
Net increase in Members’ Capital resulting from operations
64,122,129 $ 753,484,546 $ 817,606,675
Members’ Capital transactions
Capital contributions
44,004,956 44,004,956
Capital withdrawals
(64,122,129) (233,723,138) (297,845,267)
Net decrease in Members’ Capital resulting from capital transactions
(64,122,129) (189,718,182) (253,840,311)
MEMBERS’ CAPITAL, December 31, 2025
$ $ 3,030,770,495 $ 3,030,770,495
From investment activities
Net investment loss
$ $ (31,934,055) $ (31,934,055)
Net realized gain on investments in securities, securities sold, not yet purchased, purchased options, foreign currency transactions, and swap contracts
276,711,434 276,711,434
Net change in unrealized gain/(loss) on investments in
securities, securities sold, not yet purchased, purchased
options, foreign currency transactions and swap
contracts
187,787,123 187,787,123
Incentive allocation
1,856,525 (1,856,525)
Net increase in Members’ Capital resulting from operations
1,856,525 $ 430,707,977 $ 432,564,502
Members’ Capital transactions
Capital contributions
35,390,905 35,390,905
Capital withdrawals
(1,856,525) (112,316,790) (114,173,315)
Net decrease in Members’ Capital resulting from capital transactions
(1,856,525) (76,925,885) (78,782,410)
MEMBERS’ CAPITAL, June 30, 2026
$ $ 3,384,552,587 $ 3,384,552,587
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Statement of Cash Flows (Unaudited)
Six Months Ended
June 30, 2026
Cash flows from operating activities
Net increase in Members’ Capital resulting from operations
$ 432,564,502
Adjustments to reconcile net increase in Members’ Capital resulting from operations to
net cash provided by operating activities:
Proceeds from sale of investments in securities
3,541,465,199
Purchase of investments in securities
(3,340,479,635)
Proceeds from sale of purchased options
1,330,005,200
Purchase of options
(1,485,514,192)
Proceeds from securities sold, not yet purchased
3,276,184,665
Cover of securities sold, not yet purchased
(2,997,489,270)
Net realized gain on investments in securities, purchased options and securities sold short
(233,838,847)
Net change in unrealized (gain)/loss on investments in securities, purchased options, securities sold short and swap contracts
(187,817,201)
Changes in assets and liabilities related to operations:
Decrease in receivable for investment securities sold
69,771,090
Increase in interest receivable
(1,371,666)
Increase in dividends receivable
(147,339)
Increase in other assets
(109,031)
Decrease in payable for investment securities purchased
(6,674,707)
Decrease in due to brokers
(20,728,925)
Increase in dividends payable on securities sold, not yet purchased
760,510
Increase in accounting and investor services fees payable
150,555
Increase in accrued expenses
753,010
Net cash provided by operating activities
377,483,918
Cash flows from financing activities
Capital contributions
35,390,905
Capital withdrawals, net of change in withdrawals payable
(199,980,149)
Net cash used in financing activities
(164,589,244)
Net change in cash, cash equivalents and restricted cash
212,894,674
Cash, cash equivalents and restricted cash at beginning of year
768,820,415
Cash, cash equivalents and restricted cash at June 30, 2026
$ 981,715,089
Supplemental disclosure of cash flow information
Cash paid during the period for interest
$ 1,017,367
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Statement of Assets, Liabilities and Members’ Capital that sum to the total of the same amount above at June 30, 2026:
Cash and cash equivalents
$ 46,278,879
Restricted cash included in cash and cash equivalents
17,648,807
Restricted cash included in due from brokers
917,787,403
Total cash, cash equivalents and restricted cash at June 30, 2026
$ 981,715,089
The accompanying notes are an integral part of these financial statements.
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Advantage Advisers Xanthus Fund, L.L.C.

Notes to Financial Statements – June 30, 2026 (Unaudited)
1.
Organization
Advantage Advisers Xanthus Fund, L.L.C. (the “Company”) was organized as a limited liability company under the laws of Delaware in January 1999. The Company is registered under the Investment Company Act of 1940, as amended (the “Act”), as a closed-end, management investment company and operates as a diversified company. The Company’s term is perpetual, but it may be dissolved under the terms of the Fourth Amended and Restated Limited Liability Company Agreement of the Company dated December 31, 2024. The Company’s investment objective is to achieve maximum capital appreciation. The Company pursues this objective by investing its assets primarily in equity securities of U.S. and foreign companies that Alkeon Capital Management L.L.C. (“Alkeon”), the sub-investment adviser of the Company, believes are well positioned to benefit from demand for their products or services; particularly, companies that can innovate or grow rapidly relative to their peers in their markets. These companies are generally considered to be “growth companies.” As part of its investment program, the Company may also engage in the short sales of securities that Alkeon believes are overvalued. Companies that derive major portions of their revenues from technology-related business lines or which are expected to benefit from technological events are an important part of the universe of growth companies. The Company may invest without limitation, however, in other industry sectors, if those other sectors present attractive opportunities for capital appreciation. The Company’s investment portfolio includes long and short positions primarily in equity securities, purchased options and total return swaps on equity securities of U.S. and non-U.S. companies. Equity securities include common and preferred stocks and other securities having equity characteristics, including convertible debt securities, stock options, warrants and rights.
Responsibility for the overall management and supervision of the operations of the Company is vested in the Board of Managers of the Company (the “Board of Managers” or the “Board”). There are six members of the Board of Managers, one of whom is an “interested person” of the Company as defined by the Act. The Company’s investment adviser is Advantage Advisers Multi-Manager, L.L.C. (“Multi-Manager” or the “Adviser”), a subsidiary of Oppenheimer Asset Management Inc. (“OAM”) and an affiliate of Oppenheimer & Co. Inc. (“Oppenheimer”). Multi-Manager also provides certain administrative services to the Company pursuant to an administrative services agreement. Multi-Manager serves as the Company’s investment adviser pursuant to an investment advisory agreement dated July 1, 2011 (the “Investment Advisory Agreement”). OAM is the managing member of Multi-Manager and Alkeon is a non-managing member of Multi-Manager. Advantage Advisers Management, L.L.C., an affiliate of Multi-Manager (the “Special Advisory Member”), holds a non-voting special advisory member interest in the Company solely for the purpose of receiving the incentive allocation (see Note 3). OAM and Alkeon are members of the Special Advisory Member. Alkeon has been retained to manage the Company’s investment portfolio under the supervision of Multi-Manager pursuant to a Sub-Advisory Agreement (as defined below) dated July 1, 2011.
The acceptance by the Company of initial and additional contributions from persons who purchase limited liability company interests (“Interests”) in the Company (each, a “Member”
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Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
1.
Organization (continued)
and collectively, “Members”) is subject to approval by the Board of Managers. The Company generally accepts initial and additional contributions as of the first day of each month. No Member has the right to require the Company to redeem any portion of its Interest. However, the Company may from time to time offer to repurchase Interests from Members. Such offers are made at such times and on such terms as may be determined by the Board of Managers, in its complete and exclusive discretion. In general, Multi-Manager recommends to the Board of Managers that the Company offer to repurchase Interests twice each year, based upon the value of Interests determined as of the end of the second fiscal quarter and as of the end of the fiscal year.
Generally, except as provided under applicable law, a Member is not liable for the Company’s debts, obligations and liabilities in any amount in excess of the capital account balance of such Member, plus such Member’s share of undistributed profits and assets.
2.
Significant Accounting Policies
The preparation of financial statements in conformity with U.S. generally accepted accounting principles (hereafter referred to as “authoritative guidance”) requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Management believes that the estimates utilized in preparing the Company’s financial statements are reasonable and prudent; however, actual results could differ from these estimates and such differences could be material.
Basis of Presentation:
The Company qualifies as an investment company under Financial Accounting Standards Board (the “FASB”) Accounting Standards Codification 946, Financial Services — Investment Company (Topic 946), Amendments to the scope, measurement and disclosure requirements (“ASC 946”), and follows the accounting and reporting guidance of ASC 946.
The following is a summary of the Company’s significant accounting policies:
a.
Revenue Recognition
Securities transactions are recorded on a trade date basis utilizing specific identification for determining realized gains and losses associated with investment transactions. Dividends received are recorded on the ex-dividend date, net of any applicable withholding taxes. Interest income and expense are recorded on the accrual basis. Premiums and discounts on fixed income securities are amortized using the effective interest rate method.
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Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
2.
Significant Accounting Policies (continued)
b.
Portfolio Valuation
The Company’s portfolio securities are valued in accordance with the Portfolio Securities Valuation Procedures (the “Valuation Policy”) adopted by the Board of Managers, which are summarized below.
(i)
Domestic exchange traded securities (other than options and securities traded on NASDAQ) are valued as follows:
(1)
at their last composite sale prices as reported on the exchanges where those securities are traded; or
(2)
if no sales of those securities are reported on a particular day, the securities are valued based upon their composite bid prices for securities held long, or their composite asked prices for securities sold, not yet purchased, as reported by those exchanges.
(ii)
Securities traded on NASDAQ are valued as follows:
(1)
at their NASDAQ Official Closing Prices (“NOCP”) (which is the last trade price at or before 4:00 p.m. (Eastern Time) adjusted up to NASDAQ’s best bid price if the last traded price is below such bid and down to NASDAQ’s best offer price if the last trade is above such offer price); or
(2)
if no NOCP is available, at their last sale prices on the NASDAQ prior to the calculation of the net asset value of the Company; or
(3)
if no sale is shown on NASDAQ, at their bid prices; or
(4)
if no sale is shown and no bid price is available, the securities are valued at fair value in accordance with the procedures described below.
Securities traded on foreign securities exchanges are valued at their last sales prices on the exchange where such securities are primarily traded, or in the absence of a reported sale on a particular day, at their bid prices (in the case of securities held long) or ask prices (in the case of securities sold, not yet purchased) as reported by such exchange.
Listed options are valued at their mid-point between the bid and ask price as reported by the exchange with the highest volume on the last day a trade was reported. Other securities for which market quotations are readily available are valued at their bid prices (or ask prices in the case of securities sold, not yet purchased) as obtained from one or more dealers making markets for those securities. Pursuant to the Valuation Policy, the Board of Managers has designated Multi-Manager as the “valuation designee” ​(in such capacity, the “Valuation Designee”) to perform the fair value determinations relating to any or all Company investments and to carry out the fair value determination functions set forth in Rule 2a-5 under the Act, subject to
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
2.
Significant Accounting Policies (continued)
b.
Portfolio Valuation (continued)
oversight by the Board of Managers. Securities for which market quotations are not readily available are valued at their fair value as determined in good faith by the Valuation Designee.
Total return swaps are valued based on the values of their reference securities determined in accordance with the procedures described above, net of any contractual terms with the counterparty.
Debt securities are valued using valuations furnished by a pricing service which employs a matrix to determine valuation for normal institutional size trading units or in consultation with brokers and dealers in such securities.
Forward contracts are traded over-the-counter. The fair value of forward contracts is determined using observable inputs such as currency exchange rates or commodity prices, applied to notional amounts stated in the applicable contracts. The Company did not hold any forward contracts during the six months ended June 30, 2026.
All assets and liabilities initially expressed in foreign currencies are converted into U.S. dollars using foreign exchange rates provided by a pricing service compiled as of 4:00 p.m. London time. Trading in foreign securities generally is completed, and the values of foreign securities are determined, prior to the close of securities markets in the U.S. Foreign exchange rates are also determined prior to such close. On occasion, the values of foreign securities and exchange rates may be affected by events occurring between the time such values or exchange rates are determined and the time the net asset value of the Company is determined. When such events materially affect the values of securities held by the Company or its liabilities, such securities and liabilities are fair valued as determined in good faith by the Valuation Designee, subject to oversight by the Board of Managers. The Company includes the portion of the results of operations resulting from changes in foreign exchange rates on investments in net realized and net change in unrealized gain/(loss) on investments in securities, purchased options, and swap contracts in the Statement of Operations.
The determination of fair value takes into account relevant factors and surrounding circumstances, which may include: (i) the nature and pricing history (if any) of the security or other investment; (ii) whether any dealer quotations are available; (iii) possible valuation methodologies that could be used to determine fair value; (iv) the recommendation of the Valuation Designee with respect to the valuation; (v) whether the same or similar securities or other investments are held by other accounts or other funds managed by Multi-Manager and the valuation method used by Multi-Manager with respect thereto; (vi) the extent to which the fair value to be determined will result from the use of data or formulae produced by third parties independent of Multi-Manager; and (vii) the liquidity or illiquidity of the market for the security or other investment. As of June 30, 2026, no securities were fair valued by the Valuation Designee.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
2.
Significant Accounting Policies (continued)
b.
Portfolio Valuation (continued)
The fair value of the Company’s assets and liabilities that qualify as financial instruments approximates the carrying amounts presented in the Statement of Assets, Liabilities and Members’ Capital.
During the six months ended June 30, 2026, the Company followed authoritative guidance for fair value measurement. The authoritative guidance establishes a framework for measuring fair value and a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. The authoritative guidance establishes three levels of inputs in the hierarchy that may be used to measure fair value as follows:
Level 1 — observable market inputs that are unadjusted quoted prices for identical assets or liabilities in active markets.
Level 2 — other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).
Level 3 — significant unobservable inputs (including the Company’s own assumptions in determining the fair value of investments).
The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in these securities. Additional information on the investments can be found in the Schedule of Portfolio Investments, the Schedule of Purchased Options, the Schedule of Securities Sold, Not Yet Purchased, and the Schedule of Swap Contracts.
The following is a summary of the inputs used, as of June 30, 2026, in valuing the Company’s investments at fair value.
Assets: Liabilities:
Valuation Inputs Valuation Inputs
Level 1—Quoted Prices Level 1—Quoted Prices
Investments in Securities
Securities Sold, Not Yet Purchased
Common Stock
$ 3,682,658,057
Common Stock
$ 1,704,321,933
Equity Options
429,127,874
Equity Options
Level 2—Other Significant Level 2—Other Significant
Observable Inputs
Observable Inputs
Total Return Swaps
255,983,312
Total Return Swaps
81,087,016
Currency Options
675,154
Currency Options
Level 3—Other Significant Level 3—Other Significant
Unobservable Inputs
Unobservable Inputs
Total $ 4,368,444,397 Total $ 1,785,408,949
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
2.
Significant Accounting Policies (continued)
c.
Cash, Cash Equivalents, and Restricted Cash
The Company treats all highly liquid financial instruments that mature within three months at the time of purchase as cash equivalents. Restricted cash of $17,648,807 listed in the Statement of Assets, Liabilities and Members’ Capital represents funds held by the Custodian, of which $7,778,072 is held as collateral for swap contracts and $9,870,735 is held as collateral for securities sold, not yet purchased. In addition, at June 30, 2026, $63,927,686 in cash equivalents was held at the Custodian in a cash reserve account.
The Company maintains cash in bank deposit accounts with the Custodian which, at times, may exceed federally insured limits. The Company has not experienced any losses in such accounts and does not believe it is exposed to any significant credit risk on such bank deposits.
d.
Income Taxes
The Company is treated as a partnership for tax purposes. As a result, no Federal, state or local income taxes have been paid by the Company and Members are individually liable for the taxes on their respective shares of the Company’s income or loss. The only taxes payable by the Company on its income are foreign withholding taxes applicable to certain foreign income. The Company identifies its major tax jurisdictions as U.S. Federal, New York State and foreign jurisdictions where the Company makes significant investments. The Company accounts for income taxes under ASC 740, Income Taxes, which provides guidance related to the evaluation of uncertain tax positions. ASC 740 requires that management evaluate whether a tax position of the Company is “more-likely-than-not” to be sustained upon examination by the applicable taxing authority, including resolution of any related appeals or litigation process, based on the technical merits of the position. The tax benefit to be recognized is measured as the largest amount of benefit that is greater than fifty percent likely of being realized upon ultimate settlement. Derecognition of a tax benefit previously recognized could result in the Company recording a tax liability that would reduce Members’ Capital.
Based on its analysis, management has concluded that no liability for unrecognized tax exposures should be recorded related to uncertain tax positions, including consideration of penalties and interest, for open tax years. The Company accrues interest and penalties, if applicable, within country tax expense in the Statement of Operations. For the six months ended June 30, 2026, the Company did not accrue any interest or penalties payable. As of June 30, 2026, the tax years that remain subject to examination by the U.S. Federal tax jurisdiction under the statute of limitations are from the year 2022 and forward and since inception in certain foreign jurisdictions. Management’s conclusions regarding the Company’s uncertain tax positions may be subject to review and adjustment at a later date based on factors including, but not limited to, on-going analyses of and changes to tax laws, regulations and interpretations thereof. Management does not expect that the total amount of unrecognized tax benefit will materially change over the next twelve months.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
2.
Significant Accounting Policies (continued)
e.
Operating Segments
An operating segment is defined in FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) as a component of a public entity that engages in business activities from which it may recognize income and incur expenses, has operating results that are regularly reviewed by the Company’s chief operating decision maker (“CODM”) to make decisions about resources to be allocated to the segment and assess its performance, and has discrete financial information available. The Principal Manager of the Company acts as the Company’s CODM. The Company represents a single operating segment, as the CODM monitors the operating results of the Company as a whole and the Company’s long-term strategic asset allocation is pre-determined in accordance with its confidential memorandum based on its investment objective of maximizing capital appreciation which is executed by the Company’s investment and sub-investment adviser. The financial information comprising the schedule of portfolio investments, statement of changes in members’ capital resulting from operations and capital transactions, total gross and net returns, and expense ratios are used by the CODM to assess the segment’s performance versus the Company’s benchmark indices and to make resource allocation decisions for the Company’s single segment, is consistent with those presented in the Company’s financial statements. Segment assets are reflected within the accompanying statement of assets, liabilities and members’ capital as “Total Assets” and segment expenses are listed within the accompanying statement of operations. Other segment items disclosed as miscellaneous expenses in the statement of operations comprise mainly of compliance and regulatory charges, prime broker administration fee and out of pocket expenses paid to the administrator and directors.
3.
Advisory Fee, Administration Fee, Related Party Transactions and Other
Multi-Manager provides administrative and investor services to the Company for which it is paid a fee by the Company computed at the annual rate of 1.35% of Members’ Capital determined as of the start of business on the first business day of the month. It is also paid a fee by the Company for investment advisory services which is computed at the annual rate of 0.40% of Members’ Capital determined as of the start of business on the first business day of the month, out of which a fee computed at the annual rate of 0.30% of the Company’s net assets is paid to Alkeon pursuant to the Sub-Advisory Agreement. Total Multi-Manager administration fees and expenses amounted to $21,452,596 and Multi-Manager advisory services fees and expenses amounted to $6,356,325 for the six months ended June 30, 2026. The administration and advisory fees are computed and paid monthly in arrears to Multi-Manager.
During the six months ended June 30, 2026, Oppenheimer earned $24,956 in brokerage commissions on portfolio transactions executed by it on behalf of the Company. Brokerage commissions paid by the Company are reflected in the net realized and net change in unrealized gain/(loss) on investments in securities, purchased options, foreign currency transactions and swap contracts in the Statement of Operations within these financial statements.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
3.
Advisory Fee, Administration Fee, Related Party Transactions and Other
(continued)
Net profits or net losses of the Company for each fiscal period (monthly) are allocated among and credited to or debited against the capital accounts of Members (but not the Special Advisory Member) as of the last day of each fiscal period in accordance with Members’ respective investment percentages for the fiscal period. In addition, so long as Multi-Manager serves as the investment adviser of the Company, Multi-Manager (or an affiliate designated by Multi-Manager) is entitled to be the Special Advisory Member of the Company. Advantage Advisers Management, L.L.C. serves as the Special Advisory Member and, in such capacity, generally is entitled to receive an incentive allocation (the “Incentive Allocation”), charged to the capital account of each Member as of the last day of each fiscal year (and as of the date of repurchase of the entire Interest of a Member), in an amount equal to 20% of the amount by which net profits, if any, for such period exceed the positive balance in the Member’s “Loss Recovery Account,” as defined in the Company’s confidential memorandum. The Incentive Allocation is credited to the capital account of the Special Advisory Member. By the last business day of the month following the date on which an Incentive Allocation is made, the Special Advisory Member may withdraw up to 100% of the Incentive Allocation that was credited to its account with respect to the allocation period. During the six months ended June 30, 2026, an incentive allocation of $1,856,525 was credited to the capital account of the Special Advisory Member, all of which was payable and was included in withdrawals payable to Special Advisory Member at June 30, 2026, in the Statement of Assets, Liabilities and Members’ Capital. Based upon the profits for the six months ended June 30, 2026, the incentive allocation that would have been credited to the Special Advisory Member’s Account is $84,640,668. However, the amount is not reflected in the accompanying Statement of Changes in Members’ Capital because the incentive allocation is credited at the end of the calendar year.
Each member of the Board of Managers (each a “Manager”) who is not an “interested person” of the Company, as defined by the Act, receives an annual retainer of $70,000 plus a fee for each meeting attended. The lead independent Manager and the chair of the audit committee of the Board of Managers each receive a supplemental retainer of $17,500 per annum. Total Board of Managers fees and expenses amounted to $266,416 during the six months ended June 30, 2026. Managers who are “interested persons” of the Company do not receive any annual or other fee from the Company. Managers who are not “interested persons” are reimbursed by the Company for all reasonable out-of-pocket expenses incurred by them in performing their duties.
The Custodian is responsible for maintaining custody of the Company’s cash and securities and for retaining sub-custodians to maintain custody of foreign securities held by the Company. Total custody fees and expenses amounted to $347,962 during the six months ended June 30, 2026, of which $145,566 is still payable and included in accrued expenses in the Statement of Assets, Liabilities and Members’ Capital.
BNY Mellon Investment Servicing (US) Inc. (“BNY”) serves as accounting and investor services agent to the Company and in that capacity provides certain accounting, recordkeeping and investor related services. The Company pays BNY a monthly fee for these services based on
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
3.
Advisory Fee, Administration Fee, Related Party Transactions and Other
(continued)
Members’ Capital determined as of the last day of each month, and reimburses BNY for certain expenses. Total BNY fees and expenses were $834,103 during the six months ended June 30, 2026, of which $429,555 is payable and is disclosed as accounting and investor services fees payable in the Statement of Assets, Liabilities and Members’ Capital.
Morgan Stanley Fund Services USA L.L.C. (“MSFS”) is engaged to provide supplemental trade reconciliation services. The Company pays MSFS a monthly fee for such services. The total fee paid to MSFS was $138,908 during the six months ended June 30, 2026, and is included in miscellaneous expense in the Statement of Operations.
Oppenheimer acts as the non-exclusive placement agent for the Company, without special compensation from the Company, and bears all costs associated with its activities as placement agent. The placement agent is entitled to charge a sales commission (placement fee) to investors of up to 3% (up to 3.1% of the amount invested) in connection with investor purchases of Interests, in its discretion. Placement fees, if any, will reduce the amount of a Member’s investment in the Company and will neither constitute an investment made by the investor in the Company nor form part of the assets of the Company. For the six months ended June 30, 2026, placement fees earned by Oppenheimer were $49,916.
4.
Indemnifications
The Company has entered into various contracts that contain routine indemnification clauses. The Company’s maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Company that have not yet occurred. However, based on experience, the Company expects the risk of loss to be remote.
5.
Securities Transactions
Aggregate purchases and sales of investment securities, excluding short-term securities, for the six months ended June 30, 2026, were $3,340,479,635 and $3,541,465,199, respectively. Aggregate purchases and sales of securities sold, not yet purchased, excluding short-term securities, for the six months ended June 30, 2026, were $2,997,489,270 and $3,276,184,665, respectively.
At December 31, 2025, the aggregate cost for Federal income tax purposes of portfolio securities and securities sold, not yet purchased was $1,925,527,448 and $1,311,981,273, respectively.
For Federal income tax purposes, at December 31, 2025, accumulated net unrealized gain on portfolio securities and securities sold, not yet purchased was $1,608,054,325 consisting of $1,674,922,305 gross unrealized gain and $66,867,980 gross unrealized loss.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
6.
Due from / to Broker
The Company’s prime brokers are Morgan Stanley & Co, Inc. (“Morgan Stanley”), Merrill Lynch Professional Clearing Corp. (“Merrill Lynch”) and Goldman Sachs & Co., LLC (“Goldman Sachs”) (collectively the “Prime Brokers”).
Due from brokers on the Statement of Assets, Liabilities and Members’ Capital primarily represents proceeds from securities sold, not yet purchased, net of excess cash, held at the Prime Brokers as of June 30, 2026, which serves as collateral for securities sold, not yet purchased and is restricted.
The Company has the ability to trade on margin and to borrow funds from brokers and banks for investment purposes. Trading in equity securities on margin involves an initial cash requirement representing at least 50% of the underlying security’s value with respect to transactions in U.S. markets and varying percentages with respect to transactions in foreign markets. The Act requires the Company to satisfy an asset coverage requirement of 300% of its indebtedness, including amounts borrowed, measured at the time the Company incurs any indebtedness. The Company pays interest on outstanding margin borrowings at the Fed Funds Effective rate plus 45 basis points (“bps”) for balances less than $140 million and the Fed Funds Effective rate plus 200 bps for balances greater than $140 million. The Company pledges securities and cash as collateral for securities sold, not yet purchased, and margin borrowings (except for cash proceeds from the sale of securities sold, not yet purchased, held at the Prime Brokers), for which collateral is maintained in one or more segregated accounts held by the Custodian. As of June 30, 2026, the total value of this collateral was $1,647,392,746, comprised of pledged securities with a value of  $1,637,522,011 which are included in investments in securities in the Statement of Assets, Liabilities and Members’ Capital and $9,870,735 of cash which is included in the cash and cash equivalents in the Statement of Assets, Liabilities and Members’ Capital. Pledged securities with a value of  $1,218,615,555, $299,559,872 and $119,346,584 are held at the Custodian as of such date on behalf of Morgan Stanley, Merrill Lynch and Goldman Sachs respectively. Additional cash of  $917,787,403 was held as of such date as collateral for securities sold, not yet purchased of which $864,131,872, $45,178,477 and $8,477,054 were held at Morgan Stanley, Goldman Sachs and Merrill Lynch, respectively, which are included as due from brokers in the Statement of Assets, Liabilities and Members’ Capital. For the six months ended June 30, 2026, the average daily amount of the margin borrowings was $71,364,588 and the daily weighted average annualized interest rate was 2.87%. The Company has borrowings outstanding at June 30, 2026, totaling $21,902,613, which is recorded as due to brokers in the Statement of Assets, Liabilities and Members’ Capital.
7.
Financial Instruments with Off-Balance Sheet Risk or Concentrations of Credit Risk
In the normal course of business, the Company trades various financial instruments and enters into various transactions with off-balance sheet risk. These financial instruments include options, swaps and securities sold, not yet purchased. Generally, these financial instruments (other than long options positions) represent future commitments to purchase or sell other financial instruments or to make certain payments on specific terms at specified future dates.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
7.
Financial Instruments with Off-Balance Sheet Risk or Concentrations of Credit Risk
(continued)
Each of these financial instruments contains varying degrees of off-balance sheet risk whereby changes in the market value of the securities underlying the financial instruments may be in excess of the amounts recognized in the Statement of Assets, Liabilities and Members’ Capital.
Securities sold, not yet purchased, represents obligations of the Company to deliver specified securities and thereby creates a liability on the part of the Company to purchase such securities in the future at prevailing market prices. Accordingly, these transactions involve off-balance sheet risk as the Company’s ultimate obligation to purchase securities sold, not yet purchased may exceed the amount indicated in the Statement of Assets, Liabilities and Members’ Capital. Primarily, the Company’s investments in securities sold, not yet purchased, and amounts included in due from/due to brokers, are positions with the Prime Brokers. Accordingly, the Company has a concentration of individual counterparty credit risk with the Prime Brokers. The Company maintains cash with the Prime Brokers and pledges securities in an account at the Custodian for the benefit of the Prime Brokers to meet margin requirements as determined by the Prime Brokers. (see Note 6)
Investing in securities of foreign companies or foreign governments involves special risks which include changes in foreign currency exchange rates and the possibility of future political, regulatory and economic developments which could adversely affect the value of such securities. Moreover, securities of many foreign companies or foreign governments and their markets may be less liquid and their prices more volatile than those of comparable U.S. companies and the U.S. government.
The Company may enter into forward contracts to hedge against foreign currency exchange rate risk for its foreign currency denominated assets and liabilities due to adverse foreign currency fluctuations against the U.S. Dollar.
Forward currency transactions are contracts or agreements for delayed delivery of specific currencies in which the seller agrees to make delivery at a specified future date of specified amount of a currency. Risks associated with these transactions are the inability of counterparties to meet the terms of their respective contracts and movements in fair value and exchange rates. Forward contracts are traded over-the-counter, and thus are subject to counterparty risk and can be illiquid. The fair value of forward contracts is obtained by applying exchange rates to notional amounts stated in the applicable contract. The gross unrealized gain is reported as an asset in the Statement of Assets, Liabilities and Members’ Capital and the gross unrealized loss is reported as a liability in the Statement of Assets, Liabilities and Members’ Capital. As of June 30, 2026, the Company did not hold forward contracts.
In some cases, the Company uses total return swaps to obtain long or short investment exposure in lieu of directly purchasing or selling an equity security. A swap is a contract under which two parties agree to make payments to each other based on changes in specified interest rates, in a specified index or in the value of a specified security or other instrument, applied to a stated, or
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
7.
Financial Instruments with Off-Balance Sheet Risk or Concentrations of Credit Risk
(continued)
“notional”, amount. Swaps generally can be classified as interest rate swaps, currency swaps, commodity swaps or equity swaps (which can also include contracts for difference), depending on the type of index or instrument used to calculate the payments. Such swaps increase or decrease the Company’s investment exposure to the particular interest rate, currency, commodity or equity involved. The Company determines the value of swaps based on the value of the securities or other assets to which the swaps relate as determined using the Company’s valuation procedures that are outlined in Note 2b. As of June 30, 2026, the counterparty for all of the total return swaps is Morgan Stanley. Any income earned from the swaps’ underlying instruments (i.e., dividends and interest) will be paid proportionately upon the unwinding of the swap or at its maturity. The change in value of a swap, including any amounts of financing interest and income earned from the underlying instrument but not yet paid, is reported as a net change in unrealized gains or losses in the Statement of Operations. Unrealized gains on swap contracts are reported as an asset and unrealized losses on swap contracts are reported as a liability in the Statement of Assets, Liabilities and Members’ Capital. A realized gain or loss is recorded upon payment or receipt of a periodic payment or termination of a swap contract. The net realized gain/(loss) on swap contracts is reflected in the Statement of Operations within these financial statements.
Swap contracts entered into by the Company require the calculation of the obligations of the parties to the agreements on a “net basis.” Consequently, current obligations (or rights) under a swap contract generally will be equal to only the net amount to be paid or received under the contract based on the relative payment obligations of each party (the “net amount”).
Certain equity swaps in which the Company engages have the effect of providing economic leveraging of the Company’s assets. Such leverage can be significant. As such, the impact of an adverse change in the value of securities subject to swaps may result in losses to the Company that are greater than the nominal value of the swap as shown on the Company’s financial statements.
When the Company enters into swaps, it is subject to the market risk associated with changes in the value of the underlying investment or instrument, as well as exposure to credit risk associated with counterparty non-performance. The Company is exposed to significant concentration of credit risk as the counterparty to all of the Company’s swap contracts is Morgan Stanley, one of the Prime Brokers. The risk of loss with respect to swaps is limited to the net amount of payments that the Company is contractually obligated to make. If the counterparty to a swap contract defaults on its obligation to the Company, the Company’s risk of loss consists of the net amount of payments that the Company contractually is entitled to receive from the counterparty, which may be different than the amounts recorded in the Statement of Assets, Liabilities and Members’ Capital. The Company considers the creditworthiness of its counterparties and maintains trading relationships with well established counterparties to minimize potential credit risk.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
7.
Financial Instruments with Off-Balance Sheet Risk or Concentrations of Credit Risk
(continued)
The unrealized gain/(loss) amount presented in the Schedule of Swap Contracts, rather than the notional amount, represents the approximate future cash to be received or paid (i.e., the fair value) on each swap contract, respectively, as of June 30, 2026. The net change in unrealized gain/(loss) on swap contracts is reflected in the Statement of Operations within these financial statements.
Total return swap agreements contain provisions that require the Company to maintain a predetermined level of Members’ Capital and/or provide limits regarding decline in the Company’s Members’ Capital over one month, three months and twelve month periods. If the Company were to violate such provisions, the counterparty to a total return swap could terminate it and request immediate payment or demand increased collateral for the net obligation owed by the Company to the counterparty. Further, the agreements state that, if the authority of Multi-Manager or Alkeon is terminated and an acceptable successor is not appointed, the swaps will terminate.
As of June 30, 2026, $7,778,072 was posted by the Company as collateral related to its total return swaps. This amount is included in the cash and cash equivalents in the Statement of Assets, Liabilities and Members’ Capital within these financial statements and is restricted.
The Company may purchase put and call options on securities and use other derivative instruments in order to gain exposure to or protect against changes in the markets or the prices of securities. The risk associated with purchasing an option is that the Company pays a premium whether or not the option is exercised. Additionally, the Company bears the risk of loss of premium and change in market value should the counterparty not perform under the contract. Put and call options purchased are accounted for in the same manner as investment securities.
The Company may also write (sell) put and call options on securities and use other derivative instruments in order to gain exposure to or protect against changes in the markets or the price of a security. Option contracts serve as components of the Company’s investment strategy and are utilized to structure investments with the goal of enhancing the performance of the Company.
When the Company writes an option, the premium received by the Company is recorded as a liability and is subsequently adjusted to the current market value of the option written. If a written call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Company has realized a gain or loss. If a written put option is exercised, the premium reduces the cost basis of the securities purchased by the Company. In writing an option, the Company bears the market risk of an unfavorable change in the price of the security or index underlying the option. Exercise by a counterparty of an option written by the Company could require the Company to sell or buy a security at a price different from its current market price.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
7.
Financial Instruments with Off-Balance Sheet Risk or Concentrations of Credit Risk
(continued)
The Company follows authoritative guidance on disclosures about derivative instruments and hedging activities. Authoritative guidance requires qualitative disclosures about objectives and strategies for using derivatives, quantitative disclosures about fair value amounts of gains and losses on derivative instruments, and disclosures about credit-risk-related contingent features in derivative agreements. All accounting policies and disclosures have been made in accordance with authoritative guidance and are incorporated for the current period as part of the disclosures within this note.
Multi-Manager believes the average quarterly notional amount shown in the table below is the most relevant measure of derivatives activity and is indicative of the Company’s volume of derivatives activity during the six months ended June 30, 2026.
Purchased Currency options:
Average notional amount
$ 6,938,748
Purchased Equity options:
Average notional amount
$ 5,109,397,144
Total Return swaps:
Average notional amount - long
$ 145,383,914
Average notional amount - short
$ 215,037,038
The Company is exposed to certain additional risks relating to derivatives. The primary underlying risk of investing in total return swaps and equity options is equity price risk. The primary underlying risk of investing in currency options is currency exchange risk.
The following tables identify the change in unrealized gain/(loss) and the net realized and unrealized gain/(loss) on derivative instruments. The gross unrealized gain and gross unrealized loss for total return swaps (equity price risk) are disclosed as an asset and a liability, respectively, in the Statement of Assets, Liabilities and Members’ Capital. As of June 30, 2026, $429,127,874 and $675,154, of the fair value of the purchased options disclosed in the Statement of Assets, Liabilities and Members’ Capital have equity price risk and currency price risk, respectively. The net change in unrealized gain/(loss) on purchased options and swaps are reflected in the Statement of Operations within these financial statements.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
7.
Financial Instruments with Off-Balance Sheet Risk or Concentrations of Credit Risk
(continued)
The Primary
Underlying Risk is
Equity Price Risk
Net
Unrealized
Gain/(Loss)
Total Year ended December 31, 2025
Purchased Equity Options $ 23,582,061
Total Return Swaps 263,950,868
Total Year ended December 31, 2025 $ 287,532,929
Total Six Months ended June 30, 2026
Purchased Equity Options $ (26,010,922)
Total Return Swaps 174,896,296
Six Months ended June 30, 2026 $ 148,885,374
Total net change in unrealized gain/(loss)
$ (138,647,555)
The Primary
Underlying Risk is
Currency Risk
Net
Unrealized
Gain/(Loss)
Total Year ended December 31, 2025
Purchased Currency Options $ 486,310
Total Year ended December 31, 2025 $ 486,310
Total Six Months ended June 30, 2026
Purchased Currency Options $ (227,297)
Six Months ended June 30, 2026 $ (227,297)
Total net change in unrealized gain/(loss)
$ (713,607)
The following table identifies the net realized gain/(loss) on derivative instruments. The net realized gain/(loss) on derivatives are reflected in the Statement of Operations within these financial statements.
The Primary
Underlying Risk is
Equity Price Risk
Net
Realized
Gain/(Loss)
Purchased Equity Options $ 14,312,561
Total Return Swaps 43,199,432
Total $ 57,511,993
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
7.
Financial Instruments with Off-Balance Sheet Risk or Concentrations of Credit Risk
(continued)
The Primary
Underlying Risk is
Currency Risk
Net
Realized
Gain/(Loss)
Purchased Currency Options $ (1,817,395)
Total $ (1,817,395)
8.
Other Risks
Risks of Equity Securities
The success of the Company’s investment program may be affected by general economic and market conditions, such as interest rates, availability of credit, inflation rates, economic uncertainty, changes in laws, and national and international political circumstances. These factors may affect the level and volatility of securities prices and the liquidity of the Company’s investments. Unexpected volatility or illiquidity could impair the Company’s profitability or result in losses.
A significant portion of the Company’s investment portfolio normally consists of long and short positions in common stocks and other equity securities (including derivatives, such as swap agreements, having returns linked to the prices of such stocks and securities). The value of the Company’s equity securities varies in response to many factors, including, but not limited to, the activities and financial condition of individual companies, the business market in which individual companies compete and general market and economic conditions.
The Company’s investments in equity securities of U.S. companies may include securities that are listed on U.S. securities exchanges as well as unlisted securities that are traded over-the-counter. Equity securities of companies traded over-the-counter may not be traded in the volumes typically found on a national securities exchange. Consequently, the Company may be required to dispose of these securities over a longer (and potentially less favorable) period of time than is required to dispose of the securities of exchange listed companies. There is no minimum required market capitalization of the companies in which the Company may invest, and the Company may invest a portion of its assets in securities of companies having smaller market capitalizations. Investments in companies with smaller market capitalizations are generally riskier than investments in larger, well-established companies.
Sector Concentration Risk
Although the Company operates as a diversified investment company under the 1940 Act, its investments may be concentrated in one or more industry sectors based on the Adviser and Sub-Adviser’s perception of investment opportunities or as the value of a particular investment increases. The Company is subject to the risk that companies in the same industry or sector are likely to react similarly to legislative or regulatory changes, adverse market conditions,
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
8.
Other Risks (continued)
increased competition, or other factors generally affecting that market segment. In such cases, the Company would be exposed to an increased risk that the value of its overall portfolio will decrease because of events that disproportionately affect certain industries and/or sectors. The industries and sectors in which the Company may be overweighted will vary. Furthermore, investments in particular industries or sectors may be more volatile than the broader market as a whole, and the Company’s investments in these industries and sectors may be disproportionately susceptible to losses even if not overweighted.
The Company will not invest 25% or more of the value of its total assets in the securities (other than U.S. Government Securities) of issuers engaged in any single industry, including any industry within the technology sector. However, it may invest 25% or more of its assets in securities of issuers engaged in related industries within a particular industry sector, including industries related to identical products. As discussed previously, such related industries may be similarly affected by a single economic, political or regulatory event or development affecting their common products.
Risks of Technology Company Securities
Investing in securities of Technology Companies involves certain risks. These risks include: the fact that certain companies in the Company’s portfolio may have limited operating histories; rapidly changing technologies may cause a company’s products to become obsolete; cyclical patterns in technology spending which may result in inventory write-offs, cancellation of orders and operating losses; scarcity of management, engineering and marketing personnel with appropriate technological training; the possibility of lawsuits related to technological patents; changing investor sentiments and preferences with regard to investments in Technology Companies (which are generally perceived as risky) with their resultant effect on the prices of underlying securities; and volatility in the U.S. and foreign stock markets which may disproportionately affect the prices of securities of Technology Companies and thus cause the Company’s performance to experience substantial volatility.
Risks of Growth Company Securities
Investing in growth companies involves substantial risks. Securities of growth companies may perform differently from the stock market as a whole and may be more volatile than other types of stocks. Since growth companies usually invest a significant portion of earnings in their businesses, they may lack the dividends of value stocks that can cushion the impact of declining stock prices in a falling market. Also, earnings disappointments often lead to sharply falling prices for growth company stocks because investors buy growth company stocks in anticipation of superior earnings growth. Securities of growth companies may also be more expensive relative to their earnings or assets as compared to value or other types of stocks.
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TABLE OF CONTENTS
Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
8.
Other Risks (continued)
Foreign Securities; Emerging Markets; Currency Risks
Foreign securities in which the Company may invest may be listed on foreign securities exchanges or traded in foreign over-the-counter markets. Investments in foreign securities are affected by risk factors generally not thought to be present in the U.S. These factors include, but are not limited to, the following: varying custody, brokerage and settlement practices and expenses; difficulty in pricing; less public information about issuers of foreign securities; less governmental regulation and supervision over the issuance and trading of securities than in the U.S.; the unavailability of financial information regarding the foreign issuer or the difficulty of interpreting financial information prepared under foreign accounting standards; less liquidity and more volatility in foreign securities markets; the possibility of expropriation or nationalization; the imposition of withholding and other taxes on interest, dividends, capital gains or other income or gross sale or disposition proceeds; and difficulties in invoking legal process abroad and enforcing contractual obligations.
Other risks of investing in foreign securities include changes in currency exchange rates (in the case of securities that are not denominated in U.S. dollars) and currency exchange control regulations or other foreign or U.S. laws or restrictions, or devaluations of foreign currencies. In addition, the Company may incur costs in connection with conversion between various currencies. The foregoing risks may be greater in emerging industrialized and less developed countries.
Recent and potential future changes in government monetary policy may affect the level of interest rates. In recent years, central banks throughout the world increased interest rates dramatically, which in turn resulted in certain inflationary pressures and created a challenging outlook for interest rates, equity prices and economic growth. These inflationary pressures were further exacerbated by the Russia-Ukraine conflict which began in February 2022. Inflation rates continue to remain high, both in the U.S. and abroad. To the extent the inflation rates remain high in the future, such rates may continue to result in periods of market volatility and may fuel market concerns regarding a potential economic recession. Any future interest rate increases may result in periods of volatility and cause the values of the fixed income securities held by the Company to decrease.
9.
Balance Sheet Offsetting
In the normal course of business, the Company enters into swaps that are governed by an agreement with Morgan Stanley. The agreement allows the Company and Morgan Stanley, as counterparty, to make net payments in respect of all transactions in the same currency, settling on the same date. The Company may post cash as collateral with the Custodian, if required to secure the Company’s obligations to the counterparty. Such cash is held by the Custodian in a segregated account and its use is restricted. (see Note 6)
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Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (continued)
9.
Balance Sheet Offsetting (continued)
In the event that the Company fails to post collateral or to comply with any restrictions or provisions of a swap contract, the counterparty has the right to set-off any amounts payable by the Company with respect to any obligations against any posted collateral or the cash equivalent of any posted collateral. Further, the counterparty has the right to liquidate, sell, pledge, re-hypothecate, or dispose such posted collateral to satisfy any outstanding obligations.
The table below presents the swaps that are set-off, if any, as well as collateral delivered, related to those swaps. The Company presents all swaps as gross unrealized gain or loss in the Statement of Assets, Liabilities and Members’ Capital.
Offsetting of Financial Assets and Derivative Assets
Gross Amount of Assets as
Presented in the Statement of
Assets, Liabilities and
Members’ Capital
Gross Amounts Not Offset in the
Statement of Assets, Liabilities and
Members’ Capital
Net Amount
Financial
Instruments
Cash Collateral
Received
Total return swaps $ 255,983,312 $ (81,087,016) $             — $ 174,896,296
Total $ 255,983,312 $ (81,087,016) $ $ 174,896,296
Offsetting of Financial Liabilities and Derivative Liabilities
Gross Amounts of Liabilities
as Presented in the Statement
of Assets, Liabilities and
Members’ Capital
Gross Amounts Not Offset in the
Statement of Assets, Liabilities and
Members’ Capital
Net Amount
Financial
Instruments
Cash Collateral
Pledged(a)
Total return swaps $ 81,087,016 $ 81,087,016 $             — $             —
Total $ 81,087,016 $ 81,087,016 $ $
(a)
Collateral pledged to counterparties is based on notional exposure. There is $7,778,072 of collateral pledged to counterparties related to derivatives trading activities which is included in the cash and cash equivalents’ restricted cash in the Statement of Assets, Liabilities and Members’ Capital.
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Advantage Advisers Xanthus Fund, L.L.C.
Notes to Financial Statements – June 30, 2026 (Unaudited) (concluded)
10.
Financial Highlights
The following represents the ratios to average Members’ Capital and other supplemental information for each period indicated:
Six Months ended
June 30,
2026
Year Ended
December 31,
2025
Year Ended
December 31,
2024
Year Ended
December 31,
2023
Year Ended
December 31,
2022
Year Ended
December 31,
2021
Members’ Capital, end of period (000s)
$   3,384,553 $   3,030,770 $   2,467,004 $   2,117,624 $   1,815,273 $   3,312,937
Ratio of net investment loss to average Members’ Capital**
(1.98)%**** (1.58)% (1.31)% (2.35)% (2.79)% (2.76)%
Ratio of expenses to average Members’ Capital**
3.91%**** 3.56% 3.86% 4.08% 4.09% 3.21%
Ratio of incentive allocation to average Members’ Capital
0.12%**** 2.20% 0.09% 0.02% 0.00%*** 0.00%
Portfolio Turnover 98%***** 174% 137% 127% 173% 92%
Total return-gross* 14.15%***** 33.38% 27.95% 27.95% (40.69)% (15.51)%
Total return-net* 11.32%***** 31.08% 27.95% 27.95% (40.69)% (15.51)%
Ratio of average borrowings to average Members’ Capital
4.43%**** 1.43% 1.22% 1.88% 4.01% 8.10%
*
Total return assumes a purchase of an Interest on the first day and a sale of the Interest on the last day of the period noted, gross/net of incentive allocation to the Special Advisory Member, if any. The figures do not include the effect of any placement fees imposed by the placement agent.
**
Does not reflect the effect of incentive allocation to the Special Advisory Member, if any.
***
Less than 0.01%
****
Annualized
*****
Unannualized
An individual Member’s ratios and returns may vary from the above based on the timing of the Member’s capital transactions.
11.
Subsequent Events
Management has evaluated the impact of subsequent events on the Company through the date the financial statements were issued. Management has determined that there are no material events that would require additional disclosure in the Company’s financial statements, except as disclosed below.
The Company received initial and additional contributions from Members of $6,152,601 from July 1, 2026 through August 27, 2026.
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Supplemental Information (Unaudited)
I.
Proxy Voting
A description of the policies and procedures that the Company uses to determine how to vote proxies relating to portfolio securities is available without charge upon request by calling Oppenheimer Asset Management Inc. collect at 212-667-4225 and at the website of the Securities and Exchange Commission (the “SEC”) at http://www.sec.gov.
Information regarding how the Company voted proxies relating to portfolio securities during the most recent twelve month period ended June 30 is available, without charge, upon request, by calling Oppenheimer Asset Management Inc. collect at 212-667-4225 and at the SEC’s website at http://www.sec.gov.
II.
Portfolio Holdings
The Company files its complete schedule of portfolio holdings with the SEC quarterly on Form N-PORT. The Company’s Forms N-PORT are available on the SEC’s website at http://www.sec.gov.
III.   Approval of Investment Advisory Agreement
At a meeting held on March 12, 2026, the Board of Managers approved the renewal of the Company’s Investment Advisory Agreement with Advantage Advisers Multi-Manager, L.L.C. (the “Adviser”) for an additional annual period.
In approving the renewal of the Investment Advisory Agreement, the Board, including each of the Managers who are not “interested persons,” as defined by the Act, of the Company (the “Independent Managers”), considered various matters at its meeting, at a separate meeting of the Independent Managers held prior to the meeting on March 12, 2026, during an executive session of the Independent Managers and over the past twelve months, including: (i) the nature, scope and quality of the services provided to the Company by the Adviser; (ii) the investment performance of the Company relative to comparable funds; (iii) the advisory fees and other fees and expenses of the Company (including fee information for comparable funds) and the estimated profitability to the Adviser from its relationship with the Company; (iv) the extent to which economies of scale in costs of providing services may be realized by the Adviser as the assets of the Company grow; and (v) whether the advisory fee adequately reflects any such economies of scale for the benefit of investors. The Board also approved the renewal of the administrative services agreement between the Company and the Adviser.
In considering the nature, scope and quality of services that the Adviser provides to the Company, the Board reviewed presentations from management relating to staffing levels, turnover in the personnel of the Adviser’s managing member, management and the organizational structure of the various affiliates and business units of Oppenheimer providing services to the Company. The Board also reviewed with management the investment management oversight, compliance, regulatory, risk management, administration and accounting-related services provided by the Adviser and the investor-related services provided by Oppenheimer and reviewed the costs associated with providing these services. The Board found that the nature, quality and level of service provided to the Company supported a determination to renew the Investment Advisory Agreement.
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Advantage Advisers Xanthus Fund, L.L.C.

Supplemental Information (Unaudited) (continued)
III.   Approval of Investment Advisory Agreement (continued)
The Board also considered various other matters, including: Oppenheimer’s commitment to the advisory business, including the alternative investment advisory business, and its platform of alternative investment product offerings (including Oppenheimer’s efforts to grow assets of the Company); the appropriateness of the Adviser’s staffing levels and the commitment of resources to fund accounting and administration, shareholder services and regulatory compliance; regulatory matters relating to the Adviser and its affiliates; and the Adviser’s oversight of third party service providers. The Board also considered that no changes were proposed to the Investment Advisory Agreement, the terms of which had previously been reviewed and considered by the Board and were determined to be satisfactory.
The Board also reviewed materials relating to the Company’s investment performance. The Board considered the Company’s performance for the year ended December 31, 2025, particularly as compared against comparable peer registered funds and comparable benchmark indices. The Board further considered that the Company has been provided with high quality investment advice over a period of many years, as demonstrated by the historic investment performance of the Company since its inception, and the Company’s average annual return of 11.29% for the period from inception in May 1999 through December 31, 2025, exceeding the returns of each of the Company’s comparable benchmarks during that period. The Board also evaluated the investment performance of the Company relative to the investment performance of other similar funds managed by Alkeon. The Board found that the Company’s performance met expectations.
The Board also considered the fees payable to the Adviser under the Investment Advisory Agreement and administrative services agreement as well as the current and historical expense ratios of the Company. It concluded that the asset-based fees paid to the Adviser are generally higher than those of the private investment funds in the performance peer group, but noted that the Company is a registered fund and that its asset-based fees are similar to those of registered funds considered as peers for fee and expense comparison purposes (albeit at the high end of the range). The Board also noted that the overall fee structure for the Company is similar to the fee structures of other Alkeon-affiliated funds, including another registered fund with an investment program similar to that of the Company and a number of Alkeon’s private investment funds, and that the Company does not bear distribution or shareholder servicing fees, unlike other peer group funds. The Board also observed that the Company’s total expense ratio was less than that of another Alkeon-affiliated fund with a similar investment program. In addition, the Board considered revenues attributable to the Company received by the Adviser and its affiliates (including fees received for investment advisory and administrative services and the performance-based incentive allocation pursuant to which 20% of the Company’s net profits otherwise allocable to each Member’s capital account is allocated to an affiliate of the Adviser) and the costs incurred by the Adviser in providing services to the Company, as well as data regarding the Adviser’s financial condition, compensation and profitability.
At the Board’s meeting, the Adviser reviewed the methodology used to estimate the Adviser’s costs and profits relating to the Company. The Board also considered the indirect benefits received by the Adviser and its affiliates attributable to their relationships with the Company, and it was determined that,
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Advantage Advisers Xanthus Fund, L.L.C.

Supplemental Information (Unaudited) (continued)
III.   Approval of Investment Advisory Agreement (continued)
although the value of such benefits could not be readily quantified or assessed, any such benefits were not unreasonable or inappropriate.
Based on its review of information relating to the Company’s fees and the profitability of the Adviser, the Board concluded that the fees payable by the Company under the Investment Advisory Agreement and administrative services agreement bear reasonable relationships to the services provided by the Adviser.
With respect to whether the Company benefits from economies of scale in costs associated with services provided to the Company, the Board recognized that economies of scale may be realized, particularly as the assets of the Company increase, and determined that it would continue to consider potential material economies of scale. It also concluded that, in light of the nature, quality and scope of the services provided by the Adviser, the costs of those services and the fees paid by similar funds, the estimated profitability to the Adviser from the Company is not so disproportionately large that it bears no reasonable relationship to the services provided.
Based on its review, the Board concluded that the Company benefits from the services provided by the Adviser, including the administrative services and compliance infrastructure provided by the Adviser. The Board noted its overall satisfaction with the nature, scope and quality of services provided by the Adviser and concluded that the Company was receiving quality services from the Adviser under its agreements with the Company.
No single factor was determinative to the conclusions of the Board. Each Independent Manager considered various factors and different Independent Managers weighed the factors differently. Based on the determinations and considerations described above, and such other matters as were deemed relevant, the Independent Managers concluded that the fees paid under the Investment Advisory Agreement are fair and reasonable in light of the quality of services provided, and as a result, the renewal and continuance of the Investment Advisory Agreement for an additional annual period is in the best interests of the Company.
IV.   Approval of Sub-Advisory Agreement
At a meeting held on March 12, 2026, the Board approved the renewal for an additional annual period of the sub-investment advisory agreement between the Adviser and Alkeon (the “Sub-Advisory Agreement”), pursuant to which Alkeon is retained to manage the investment portfolio of the Company.
In approving the renewal of the Sub-Advisory Agreement, the Board, including each of the Independent Managers considered various matters at its meeting, at a separate meeting of the Independent Managers held prior to the meeting on March 12, 2026, during an executive session of the Independent Managers and over the past twelve months, including: (i) the nature, scope and quality of the services provided to the Company by Alkeon; (ii) the research and portfolio management capabilities of Alkeon and personnel of Alkeon responsible for providing services to the Company; (iii) the appropriateness of Alkeon staffing levels; (iv) regulatory matters relating to Alkeon; and (v) other matters, including the investment performance of the Company, the fees and other revenues received by Alkeon attributable to its relationship with the Company and the services Alkeon provides (including revenues Alkeon receives
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Supplemental Information (Unaudited) (continued)
IV.   Approval of Sub-Advisory Agreement (continued)
as a non-managing member of the Adviser), the estimated profitability to Alkeon attributable to its relationship with the Company, and whether Alkeon had realized any economies of scale in its costs of providing services to the Company. The Board also considered that no changes were proposed to the Sub-Advisory Agreement, the terms of which had previously been reviewed and considered by the Board and were determined to be satisfactory.
In its deliberations, the Board considered the Company’s performance for the year ended December 31, 2025, particularly as compared against comparable peer registered funds and comparable benchmark indices. The Board further considered that the Company has been provided with high quality investment advice over a period of many years, as demonstrated by the historic investment performance of the Company since its inception, and the Company’s average annual return of 11.29% for the period from inception in May 1999 through December 31, 2025, exceeding the returns of each of the Company’s comparable benchmarks during that period. The Board also evaluated the investment performance of the Company relative to the investment performance of other similar investment funds managed by Alkeon. The Board found that performance met expectations. Based on its review, the Board concluded that the Company benefits from the services provided by Alkeon, including research and portfolio management services. The Board noted its overall satisfaction with the nature, scope and quality of services provided by Alkeon and concluded that the Company was receiving quality services from Alkeon under the Sub-Advisory Agreement. The indirect benefits received by Alkeon attributable to its relationship with the Company were also considered, and it was determined that, although the value of such benefits could not be readily quantified or assessed, any such benefits were not unreasonable or inappropriate.
With respect to the fees payable under the Sub-Advisory Agreement, the Board noted that, although the Company does not pay a fee to Alkeon under the Sub-Advisory Agreement, the Company pays an advisory fee computed at the annual rate of 0.40% of the Company’s net assets to the Adviser pursuant to its Investment Advisory Agreement with the Adviser, out of which a fee computed at the annual rate of 0.30% of the Company’s net assets is paid to Alkeon pursuant to the Sub-Advisory Agreement. In addition, the Board noted that each Member’s capital account is subject to a performance-based incentive allocation pursuant to which 20% of the Company’s net profits otherwise allocable to the Member are allocated to an affiliate of the Adviser (subject to a highwater mark), and that (through its ownership of interests in the Adviser and this affiliate), Alkeon shares in the revenues of the Adviser and its affiliate attributable to the Company.
As previously noted with respect to the continuances of the Company’s agreements with the Adviser, the Board concluded that the asset-based fees paid to the Adviser are generally higher than those of the private investment funds in the performance peer group, but noted that the Company is a registered fund and that its asset-based fees are similar to those of registered funds considered as peers for fee and expense comparison purposes (albeit at the high end of the range). The Board also noted that the overall fee structure for the Company is similar to the fee structures of other Alkeon-affiliated funds, including another registered fund with an investment program similar to that of the Company and a number of Alkeon’s private investment funds.
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Supplemental Information (Unaudited) (concluded)
IV.   Approval of Sub-Advisory Agreement (continued)
Consideration was also given to the costs of the services provided by Alkeon and an estimate of the profits that are realized by Alkeon from its relationship with the Company (including the fees it is paid under the Sub-Advisory Agreement and its share of the revenues of the Adviser and the Adviser’s affiliate). The extent to which economies of scale in costs of providing services would be realized by Alkeon as the Company grows and whether the fee payable to Alkeon pursuant to the Sub-Advisory Agreement adequately reflects these economies of scale for the benefit of Members were also considered. The Board determined that, in light of the nature, quality and scope of the services provided by Alkeon, the costs of those services and the fees paid by similar funds, the estimated profitability of Alkeon is not so disproportionately large that it bears no reasonable relationship to the services that it provides.
Based upon consideration of these matters, the Board concluded that it would be in the best interest of the Company to approve the renewal of the Sub-Advisory Agreement.
No single factor was determinative to the conclusions of the Board. Each Independent Manager considered various factors and different Independent Managers weighed the factors differently. Based on the determinations and considerations described above, and such other matters as were deemed relevant, the Independent Managers concluded that the fees received by Alkeon under the Sub-Advisory Agreement are fair and reasonable in light of the quality of services provided, and as a result, the renewal and continuance of the Sub-Advisory Agreement for an additional annual period is in the best interests of the Company.
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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)Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period is included as part of the report to shareholders filed under Item 1(a) of this form.

 

(b)Not applicable.

 

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

 

(a)Not applicable.

 

(b)Not applicable.

 

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.

 

Not applicable.

 

 

 

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

 

The basis for the approval of the investment advisory contract and sub-advisory contract is included as part of the report to shareholders filed under Item 1(a) of this form.

 

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.

 

There has been no change, as of the date of this filing, in any of the portfolio managers identified in response to paragraph (a)(1) of this Item in the registrant’s most recently filed annual report on Form N-CSR.

 

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 have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant’s board of managers, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-K (17 CFR 229.407) (as required by Item 22(b)(15) of Schedule 14A (17 CFR 240.14a-101)), or this Item.

 

Item 16. Controls and Procedures.

 

(a)The registrant’s principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”) (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on their evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934, as amended (17 CFR 240.13a-15(b) or 240.15d-15(b)).

 

(b)There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d))) 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.

 

(a)Not applicable.

 

(b)Not applicable.

 

Item 18. Recovery of Erroneously Awarded Compensation.

 

Not applicable.

 

Item 19. Exhibits.

 

(a)(1)Not applicable.

 

(a)(2)Not applicable.

 

(a)(3)Certifications pursuant to Rule 30a-2(a) under the 1940 Act and Section 302 of the Sarbanes-Oxley Act of 2002 are attached hereto.

 

(a)(4)There were no written solicitations to purchase securities under Rule 23c-1 under the Act sent or given during the period covered by the report by or on behalf of the Registrant to 10 or more persons.

 

(a)(5)There was no change in the Registrant’s independent public accountant during the period covered by the report.

 

 

 

SIGNATURES

 

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

 

(Registrant) Advantage Advisers Xanthus Fund, L.L.C.  

 

By (Signature and Title) /s/ Bryan McKigney  
  Bryan McKigney, Principal Executive Officer  
  (Principal Executive Officer)  

 

Date: September 2, 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 (Signature and Title) /s/ Bryan McKigney  
  Bryan McKigney, Principal Executive Officer  
  (Principal Executive Officer)  

 

Date: September 2, 2026  

 

By (Signature and Title) /s/ Vineet Bhalla  
  Vineet Bhalla, Chief Financial Officer  
  (Principal Financial Officer)  

 

Date: September 2, 2026  

 

 

 


ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

EXHIBIT 99.CERT