Arkolith/Funds/Whitebox Advisors LLC

Whitebox Advisors LLC

CIK 1257391
Holdings as of Mar 31, 2026·disclosed May 15, 2026·~45-day 13F lag·13F-HR
Active Filer

Whitebox Advisors LLC holds a focused book of 545 stocks worth $6.9B as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Penumbra Inc and trimmed Lumentum Holdings Inc. Their largest long position is Western Digital Corp at 21% of the equity book. They also disclosed $1.2B in put options (a bearish bet) and $17.3M in call options (bullish), shown separately below and excluded from the equity book.

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Use Arkolith to show WHITEBOX ADVISORS LLC's latest
holdings, largest changes, and filing provenance.
Opened
170
new positions
Added to
33
existing
Trimmed
37
reduced
Sold out
61
exited

Concentration

Top-heavy: focused book

Top 5 holdings
43%
Top 10 holdings
56%
Top 20 holdings
70%

Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.

Direct sector allocation

23% mapped to company sectors

ETF / fund or unclassified
77%
Financials
10%
Health Care
3%
Industrials
3%
Communication Services
3%
Energy
2%
Consumer Discretionary
1%
Materials
0%

Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.

Biggest moves: latest quarter

Estimated $ traded · quarter-end prices, no cost basis

Bought
Trimmed / exited
  • LUMENTUM HOLDINGS INCLITE 0.5 12/15/26
    ▼−10%$26.0M
  • MARA HOLDINGS INCMARA 0 06/01/31
    ▼−30%$20.2M
  • WAYFAIR INCW 3.5 11/15/28
    ▼−37%$18.6M
  • FOX CORP - CLASS BFOX
    ▼−66%$18.2M
  • CLEANSPARK INCCLSK 0 06/15/30
    ▼−37%$15.9M
  • JETBLUE AIRWAYS CORPJBLU 2.5 09/01/29
    ▼−15%$12.2M

Holdings: largest first

Bars show each stock's share of the portfolio. Click a row for its position history.

545 positions
#SecurityValueShares% PortLast moveHistory
1Western Digital Corp
NOTE 3.000%11/1
$1.5B204.40M
21.1%
—Held
2Lumentum Hldgs Inc
NOTE 1.500%12/1
$716.1M71.03M
10.3%
—Held
3Echostar Corp
NOTE 3.875%11/3
$365.1M102.20M
5.3%
▲+86%
Added · +47.3M sh
4Lumentum Hldgs Inc
NOTE 0.500%12/1
$226.9M32.10M
3.3%
▼−10%
Reduced · −3.7M sh
5Alibaba Group Hldg Ltd
NOTE 0.500% 6/0
$221.8M159.90M
3.2%
▲+6.7%
Added · +10.0M sh
6Sphere Entertainment Co
NOTE 3.500%12/0
$216.8M64.50M
3.1%
▼−3.2%
Reduced · −2.1M sh
7Snowflake Inc
NOTE 10/0
$174.7M142.81M
2.5%
▲+14%
Added · +17.5M sh
8Snowflake Inc
NOTE 10/0
$162.3M137.45M
2.3%
▲+1.9%
Added · +2.5M sh
9Applied Digital Corp
NOTE 2.750% 6/0
$161.2M60.80M
2.3%
—Held
10Chart Inds Inc
COM
$156.9M758.9K
2.3%
▲+36%
Added · +199K sh
11Penumbra Inc
COM
$146.1M445.0K
2.1%
▲New
New position
12Trip Com Group Ltd
NOTE 0.750% 6/1
$136.3M131.73M
2.0%
▲+12%
Added · +13.9M sh
13Webster Finl Corp
COM
$133.6M1.93M
1.9%
▲New
New position
14Strategy Inc
NOTE 2.250% 6/1
$114.2M112.00M
1.6%
▲+0.4%
Added · +500K sh
15Coinbase Global Inc
NOTE 0.250% 4/0
$111.6M120.46M
1.6%
▲+34%
Added · +30.4M sh
16Centrus Energy Corp
NOTE 2.250%11/0
$92.5M45.60M
1.3%
—Held
17Liberty Broadband Corp
COM SER C
$74.3M1.48M
1.1%
▲+0.1%
Added · +1K sh
18Rivian Automotive Inc
NOTE 3.625%10/1
$74.0M77.24M
1.1%
▲+19%
Added · +12.5M sh
19Strategy Inc
NOTE 12/0
$71.8M86.05M
1.0%
▲+6.2%
Added · +5.0M sh
20Jetblue Airways Corp
NOTE 2.500% 9/0
$69.6M72.37M
1.0%
▼−15%
Reduced · −12.7M sh
21Upstart Hldgs Inc
NOTE 2.000%10/0
$63.3M64.90M
0.9%
▼−7.3%
Reduced · −5.1M sh
22Mara Holdings Inc
NOTE 3/0
$61.6M69.85M
0.9%
—Held
23Valaris Ltd
CL A
$57.2M583.9K
0.8%
▲New
New position
24Terns Pharmaceuticals Inc
COM
$52.7M1.00M
0.8%
▲New
New position
25Triple Flag Precious Metal
COM
$52.7M1.52M
0.8%
▼−0.5%
Reduced · −8K sh
26Encore Cap Group Inc
NOTE 4.000% 3/1
$51.3M40.76M
0.7%
▼−14%
Reduced · −6.8M sh
27Masimo Corp
COM
$48.0M270.0K
0.7%
▲New
New position
28Mara Holdings Inc
NOTE 6/0
$47.7M52.00M
0.7%
▼−30%
Reduced · −22.0M sh
29Gulfport Energy Corp
COMMON SHARES
$46.5M219.6K
0.7%
▼−2.2%
Reduced · −5K sh
30Strategy Inc
NOTE 0.625% 9/1
$46.0M42.00M
0.7%
▲+14%
Added · +5.0M sh
31Strategy Inc
NOTE 3/0
$45.2M51.78M
0.7%
▲New
New position
32Warner Bros Discovery Inc
COM SER A
$44.3M1.62M
0.6%
▲+304%
Added · +1.2M sh
33Upstart Hldgs Inc
NOTE 1.000%11/1
$43.0M60.73M
0.6%
—Held
34Mara Holdings Inc
NOTE 2.125% 9/0
$42.3M49.95M
0.6%
▲+19%
Added · +8.0M sh
35Oracle Corp
6.5 DEP CUM SR D
$40.5M900.0K
0.6%
▲New
New position
36Omeros Corp
NOTE 9.500% 6/1
$36.4M18.03M
0.5%
—Held
37Herbalife Ltd
NOTE 4.250% 6/1
$35.0M29.32M
0.5%
▼−9.3%
Reduced · −3.0M sh
38Carnival PLC
ADS
$33.5M1.30M
0.5%
▲New
New position
39Wolfspeed Inc
NOTE 2.500% 6/1
$31.2M21.55M
0.4%
▲+3.2%
Added · +674K sh
40Wayfair Inc
NOTE 3.500%11/1
$31.2M17.90M
0.4%
▼−37%
Reduced · −10.7M sh
41Cleanspark Inc
NOTE 6/1
$27.6M28.64M
0.4%
▼−37%
Reduced · −16.5M sh
42Heico Corp New
CL A
$26.3M124.7K
0.4%
—Held
43Sunrun Inc
NOTE 4.000% 3/0
$24.6M20.65M
0.4%
▼−30%
Reduced · −8.9M sh
44Chord Energy Corporation
COM NEW
$22.7M159.5K
0.3%
▼−8.6%
Reduced · −15K sh
45Iren Limited
NOTE 3.250% 6/1
$22.1M9.76M
0.3%
—Held
46Lumentum Hldgs Inc
COM
$21.6M30.8K
0.3%
▲New
New position
47Amc Networks Inc
NOTE 4.250% 2/1
$21.0M23.73M
0.3%
—Held
48Fluence Energy Inc
NOTE 2.250% 6/1
$20.1M20.00M
0.3%
▲New
New position
49SM Energy Company
COM
$18.8M602.3K
0.3%
▲New
New position
50PTC Therapeutics Inc
NOTE 1.500% 9/1
$17.7M13.27M
0.3%
▼−24%
Reduced · −4.2M sh
Showing 50 of 545 positions

Largest options & derivatives disclosed

Put / call positions from the 13F — totals include every disclosed option leg

Put notional (bearish)$1.2B
Call notional (bullish)$17.3M
TypeUnderlyingNotional valueUnderlying shares
PUT · bearishSS SPDR S&P 500 ETF TRUST-USSPY$325.2M500K
PUT · bearishISHARES RUSSELL 2000 ETFIWM$186.0M750K
PUT · bearishNVIDIA CORPNVDA$139.5M800K
PUT · bearishSUPER MICRO COMPUTER INCSMCI$104.7M4.6M
PUT · bearishTAIWAN SEMICONDUCTOR-SP ADRTSM$67.6M200K
PUT · bearishISHARES BITCOIN TRUST ETFIBIT$57.6M1.5M
PUT · bearishNEBIUS GROUP NVNBIS$51.9M500K
PUT · bearishAPPLE INCAAPL$50.8M200K
PUT · bearishMARA HOLDINGS INCMARA$35.7M4.4M
PUT · bearishWARNER BROS DISCOVERY INCWBD$30.2M1.1M
PUT · bearishTESLA INCTSLA$27.9M75K
PUT · bearishTERNS PHARMACEUTICALS INC430$26.4M500K
PUT · bearishLUMEN TECHNOLOGIES INCLUMN$24.3M3.5M
PUT · bearishMEDICAL PROPERTIES TRUST INCMPT$8.3M1.8M
CALL · bullishMARA HOLDINGS INCMARA$8.2M1.0M
CALL · bullishJETBLUE AIRWAYS CORPJBLU$7.7M1.8M
PUT · bearishHERTZ GLOBAL HLDGS INCHTZ$6.8M1.5M
PUT · bearishTRANSOCEAN LTDRIG$6.6M1.0M
PUT · bearishSAREPTA THERAPEUTICS INCSRPT$4.7M215K
PUT · bearishBITDEER TECHNOLOGIES GROUP-ABTDR$3.4M393K
PUT · bearishXEROX HOLDINGS CORPXRX$2.6M2.0M
CALL · bullishSABRE CORPSABR$1.4M1.0M
PUT · bearishAMC ENTERTAINMENT HLDS-CL AAMC$980K1.0M

13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the equity book, weighting, concentration and sector figures above.

Filing history

As-of date vs the date the SEC received each filing

QuarterAs ofFiledPositionsValueForm
Q1 2026Mar 31, 2026May 15, 2026568$8.1B13F-HR
Q4 2025Dec 31, 2025Feb 17, 2026492$7.0B13F-HR
Q3 2025Sep 30, 2025Nov 14, 2025427$6.5B13F-HR
Q2 2025Jun 30, 2025Aug 14, 2025382$4.7B13F-HR
Q1 2025Mar 31, 2025May 15, 2025312$3.9B13F-HR
Q4 2024Dec 31, 2024Feb 14, 2025270$3.5B13F-HR
Q3 2024Sep 30, 2024Nov 14, 2024321$3.7B13F-HR
Q2 2024Jun 30, 2024Aug 14, 2024349$3.5B13F-HR
Q1 2024Mar 31, 2024May 15, 2024340$4.0B13F-HR
Q4 2023Dec 31, 2023Feb 14, 2024332$3.6B13F-HR
Q3 2023Sep 30, 2023Nov 14, 2023385$3.2B13F-HR
Q2 2023Jun 30, 2023Aug 14, 2023438$3.7B13F-HR
Q1 2023Mar 31, 2023May 15, 2023569$2.9B13F-HR
Q4 2022Dec 31, 2022Feb 14, 2023771$3.6B13F-HR
Q3 2022Sep 30, 2022Nov 14, 2022949$3.6B13F-HR
Q2 2022Jun 30, 2022Aug 15, 2022913$3.2B13F-HR
Q1 2022Mar 31, 2022May 16, 2022941$5.0B13F-HR
Q4 2021Dec 31, 2021Feb 14, 2022819$4.9B13F-HR
Q3 2021Sep 30, 2021Nov 15, 2021645$4.8B13F-HR
Q2 2021Jun 30, 2021Aug 16, 2021538$4.9B13F-HR
Q1 2021Mar 31, 2021May 14, 2021381$3.1B13F-HR
Q4 2020Dec 31, 2020Feb 16, 2021149$3.2B13F-HR
Q3 2020Sep 30, 2020Nov 13, 202095$2.4B13F-HR
Q2 2020Jun 30, 2020Aug 14, 202072$1.8B13F-HR

Data source

Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.