WHITEBOX ADVISORS LLC — 13F Holdings & Portfolio
CIK 1257391 · latest 13F-HR filed 2026-05-15
WHITEBOX ADVISORS LLC manages $8.12B in 13F-reported U.S. long-equity assets across 568 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are WDC (18.01%), LITE (8.81%), ECHOSTAR CORP (4.49%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 170 new positions, exited 88, added to 69, and trimmed 146.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$8.12B
Long-equity book
568
Distinct positions
2026-03-31
Filed 2026-05-15
+170 / −88 / ↑69 / ↓146
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- WESTERN DIGITAL CORP$526.2M +56.2%
- LUMENTUM HLDGS INC$338.9M +89.8%
- ECHOSTAR CORP$181.6M +99.0%
- LUMENTUM HLDGS INC$94.2M +71.0%
- CHART INDS INC$41.4M +35.9%
Top Trims
- SNOWFLAKE INC-$38.1M -19.0%
- WAYFAIR INC-$34.1M -52.2%
- CENTRUS ENERGY CORP-$29.8M -24.3%
- UPSTART HLDGS INC-$24.9M -28.3%
- FOX CORP-$24.4M -72.4%
New Positions
- PENUMBRA INC$146.1M
- WEBSTER FINL CORP$133.6M
- VALARIS LTD$57.2M
- TERNS PHARMACEUTICALS INC$52.7M
- MASIMO CORP$48.0M
Exited Positions
- CADENCE BANK$128.5M
- COMERICA INC$108.7M
- CYBERARK SOFTWARE LTD$76.3M
- COINBASE GLOBAL INC$60.9M
- FRESHPET INC$36.7M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | WESTERN DIGITAL CORP | WDC | 958102AT2 | $1.46B | 18.01% | 204,400,000 | PRN |
| 2 | LUMENTUM HLDGS INC | LITE | 55024UAH2 | $716.1M | 8.81% | 71,025,000 | PRN |
| 3 | ECHOSTAR CORP | — | 278768AB2 | $365.1M | 4.49% | 102,197,086 | PRN |
| 4 | STATE STR SPDR S&P 500 ETF T Put | SPY | 78462F103 | $325.2M | 4.00% | 500,000 | SH |
| 5 | LUMENTUM HLDGS INC | LITE | 55024UAD1 | $226.9M | 2.79% | 32,097,500 | PRN |
| 6 | ALIBABA GROUP HLDG LTD | BABAF | 01609WBG6 | $221.8M | 2.73% | 159,900,000 | PRN |
| 7 | SPHERE ENTERTAINMENT CO | SPHR | 55826TAB8 | $216.8M | 2.67% | 64,504,000 | PRN |
| 8 | ISHARES TR Put | IWM | 464287655 | $186.0M | 2.29% | 750,000 | SH |
| 9 | SNOWFLAKE INC | SNOW | 833445AD1 | $174.7M | 2.15% | 142,807,000 | PRN |
| 10 | SNOWFLAKE INC | SNOW | 833445AB5 | $162.3M | 2.00% | 137,450,000 | PRN |
| 11 | APPLIED DIGITAL CORP | APLD | 038169AB4 | $161.2M | 1.98% | 60,800,000 | PRN |
| 12 | CHART INDS INC | GTLS | 16115Q308 | $156.9M | 1.93% | 758,887 | SH |
| 13 | PENUMBRA INC | PEN | 70975L107 | $146.1M | 1.80% | 445,001 | SH |
| 14 | NVIDIA CORPORATION Put | NVDA | 67066G104 | $139.5M | 1.72% | 800,000 | SH |
| 15 | TRIP COM GROUP LTD | TRPCF | 89677QAB3 | $136.3M | 1.68% | 131,732,000 | PRN |
| 16 | WEBSTER FINL CORP | WBS | 947890109 | $133.6M | 1.64% | 1,925,001 | SH |
| 17 | STRATEGY INC | MHIFF | 594972AN1 | $114.2M | 1.41% | 112,000,000 | PRN |
| 18 | COINBASE GLOBAL INC | COIN | 19260QAF4 | $111.6M | 1.37% | 120,456,000 | PRN |
| 19 | SUPER MICRO COMPUTER INC Put | SMCI | 86800U302 | $104.7M | 1.29% | 4,600,000 | SH |
| 20 | CENTRUS ENERGY CORP | LEU | 15643UAE4 | $92.5M | 1.14% | 45,600,000 | PRN |
| 21 | LIBERTY BROADBAND CORP | LBRDK | 530307305 | $74.3M | 0.91% | 1,477,741 | SH |
| 22 | RIVIAN AUTOMOTIVE INC | RIVN | 76954AAD5 | $74.0M | 0.91% | 77,237,000 | PRN |
| 23 | STRATEGY INC | MHIFF | 594972AS0 | $71.8M | 0.88% | 86,050,000 | PRN |
| 24 | JETBLUE AIRWAYS CORP | JBLU | 477143AR2 | $69.6M | 0.86% | 72,371,000 | PRN |
| 25 | TAIWAN SEMICONDUCTOR MANUFAC Put | TSM | 874039100 | $67.6M | 0.83% | 200,000 | SH |
| 26 | UPSTART HLDGS INC | UPST | 91680MAD9 | $63.3M | 0.78% | 64,900,000 | PRN |
| 27 | MARA HOLDINGS INC | MARA | 565788AF3 | $61.6M | 0.76% | 69,850,000 | PRN |
| 28 | ISHARES BITCOIN TRUST ETF Put | IBIT | 46438F101 | $57.6M | 0.71% | 1,500,000 | SH |
| 29 | VALARIS LTD | VAL | G9460G101 | $57.2M | 0.70% | 583,937 | SH |
| 30 | TERNS PHARMACEUTICALS INC | TERN | 880881107 | $52.7M | 0.65% | 1,000,001 | SH |
| 31 | TRIPLE FLAG PRECIOUS METAL | TFPM | 89679M104 | $52.7M | 0.65% | 1,518,950 | SH |
| 32 | NEBIUS GROUP N.V. Put | NBIS | N97284108 | $51.9M | 0.64% | 500,000 | SH |
| 33 | ENCORE CAP GROUP INC | ECPG | 292554AP7 | $51.3M | 0.63% | 40,762,000 | PRN |
| 34 | APPLE INC Put | AAPL | 037833100 | $50.8M | 0.62% | 200,000 | SH |
| 35 | MASIMO CORP | MASI | 574795100 | $48.0M | 0.59% | 270,001 | SH |
| 36 | MARA HOLDINGS INC | MARA | 565788AH9 | $47.7M | 0.59% | 52,000,000 | PRN |
| 37 | GULFPORT ENERGY CORP | GPOR | 402635502 | $46.5M | 0.57% | 219,627 | SH |
| 38 | STRATEGY INC | MHIFF | 594972AQ4 | $46.0M | 0.57% | 42,000,000 | PRN |
| 39 | STRATEGY INC | MHIFF | 594972AU5 | $45.2M | 0.56% | 51,782,000 | PRN |
| 40 | WARNER BROS DISCOVERY INC | WBD | 934423104 | $44.3M | 0.55% | 1,615,001 | SH |
| 41 | UPSTART HLDGS INC | UPST | 91680MAF4 | $43.0M | 0.53% | 60,730,000 | PRN |
| 42 | MARA HOLDINGS INC | MARA | 565788AD8 | $42.3M | 0.52% | 49,950,000 | PRN |
| 43 | ORACLE CORP | ORCLPD | 68389X204 | $40.5M | 0.50% | 900,000 | SH |
| 44 | OMEROS CORP | — | 682143AK8 | $36.4M | 0.45% | 18,033,000 | PRN |
| 45 | MARA HOLDINGS INC Put | MARA | 565788106 | $35.7M | 0.44% | 4,369,200 | SH |
| 46 | HERBALIFE LTD | HLF | 42703MAF0 | $35.0M | 0.43% | 29,321,000 | PRN |
| 47 | CARNIVAL PLC | CUK | 14365C103 | $33.5M | 0.41% | 1,300,036 | SH |
| 48 | WOLFSPEED INC | WOLF | 977852AP7 | $31.2M | 0.38% | 21,545,000 | PRN |
| 49 | WAYFAIR INC | W | 94419LAR2 | $31.2M | 0.38% | 17,900,000 | PRN |
| 50 | WARNER BROS DISCOVERY INC Put | WBD | 934423104 | $30.2M | 0.37% | 1,100,000 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-15 | $8.12B | 568 | 0001257391-26-000004 |
| 2025-12-31 | 2026-02-17 | $7.05B | 492 | 0001257391-26-000002 |
| 2025-09-30 | 2025-11-14 | $6.46B | 427 | 0001257391-25-000009 |