Hudson Bay Capital Management LP holds a diversified book of 1261 stocks worth $16.6B as of Q1 2026 (disclosed May 13, 2026, a ~45-day 13F lag). This quarter they opened Unitedhealth Group Inc and trimmed Nvidia Corp. Their largest long position is Nvidia Corp at 5% of the equity book. They also disclosed $10.9B in put options (a bearish bet) and $1.5B in call options (bullish), shown separately below and excluded from the equity book.
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1393825/holdings"
Use Arkolith to show Hudson Bay Capital Management LP's latest holdings, largest changes, and filing provenance.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
86% mapped to company sectors
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.
Estimated $ traded · quarter-end prices, no cost basis
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Nvidia Corporation COM | $910.1M | 5.22M | 5.5% | ▼−6.6% Reduced · −369K sh | |
| 2 | Tesla Inc COM | $705.4M | 1.90M | 4.2% | ▲+4.7% Added · +85K sh | |
| 3 | Amazon Com Inc COM | $614.7M | 2.95M | 3.7% | ▲+13% Added · +341K sh | |
| 4 | Apple Inc COM | $517.6M | 2.04M | 3.1% | ▲+71% Added · +848K sh | |
| 5 | Echostar Corp NOTE 3.875%11/3 | $469.9M | 131.20M | 2.8% | ▲+59% Added · +48.6M sh | |
| 6 | Flagstar Bank National Assoc COM NEW | $456.9M | 34.69M | 2.7% | —Held | |
| 7 | Netflix Inc. COM | $440.4M | 4.58M | 2.6% | ▲+22% Added · +830K sh | |
| 8 | Palantir Technologies Inc CL A | $396.2M | 2.71M | 2.4% | ▲+6.0% Added · +153K sh | |
| 9 | Berkshire Hathaway Inc Del CL B NEW | $366.7M | 765.3K | 2.2% | ▲+26% Added · +160K sh | |
| 10 | Advanced Micro Devices Inc COM | $330.1M | 1.62M | 2.0% | ▼−31% Reduced · −727K sh | |
| 11 | PG&E Corp NOTE 4.250%12/0 | $274.5M | 263.89M | 1.7% | ▲+0.7% Added · +1.8M sh | |
| 12 | Alibaba Group Hldg Ltd NOTE 0.500% 6/0 | $270.2M | 194.50M | 1.6% | ▼−4.4% Reduced · −9.0M sh | |
| 13 | Microsoft Corp COM | $270.0M | 729.4K | 1.6% | ▼−13% Reduced · −106K sh | |
| 14 | Transocean Inc DEB 4.625% 9/3 | $265.9M | 131.24M | 1.6% | ▲+6.1% Added · +7.6M sh | |
| 15 | Taiwan Semiconductor Manufac SPONSORED ADS | $242.2M | 716.7K | 1.5% | ▲+236% Added · +503K sh | |
| 16 | Unitedhealth Group Inc COM | $189.4M | 700.0K | 1.1% | ▲New New position | |
| 17 | Micron Technology Inc COM | $168.9M | 500.1K | 1.0% | ▲New New position | |
| 18 | State STR SPDR S&P 500 ETF T TR UNIT | $164.9M | 253.5K | 1.0% | ▲+92% Added · +121K sh | |
| 19 | Bofa Fin LLC MTNF 0.600% 5/2 | $156.3M | 130.31M | 0.9% | ▲+55% Added · +46.0M sh | |
| 20 | Broadcom Inc COM | $154.8M | 500.0K | 0.9% | ▼−8.2% Reduced · −45K sh | |
| 21 | Electronic Arts Inc COM | $148.6M | 728.7K | 0.9% | ▲+83% Added · +331K sh | |
| 22 | Uniti Group LLC NOTE 7.500%12/0 | $136.4M | 117.12M | 0.8% | ▼−2.5% Reduced · −3.0M sh | |
| 23 | Warner Bros Discovery Inc COM SER A | $131.6M | 4.79M | 0.8% | ▲106× Added · +4.7M sh | |
| 24 | Oracle Corp COM | $123.9M | 842.5K | 0.7% | ▲40× Added · +822K sh | |
| 25 | Dollar Tree Inc COM | $123.6M | 1.13M | 0.7% | ▲+14% Added · +140K sh | |
| 26 | Norfolk Southn Corp COM | $118.4M | 412.6K | 0.7% | ▲+23% Added · +77K sh | |
| 27 | Penumbra Inc COM | $114.6M | 349.0K | 0.7% | ▲New New position | |
| 28 | Shopify Inc CL A SUB VTG SHS | $112.7M | 950.0K | 0.7% | ▲+2.6% Added · +24K sh | |
| 29 | Disney Walt Co COM | $106.0M | 1.10M | 0.6% | ▼−2.4% Reduced · −27K sh | |
| 30 | Adobe Inc COM | $104.2M | 428.5K | 0.6% | ▲+48% Added · +139K sh | |
| 31 | Arista Networks Inc COM SHS | $96.6M | 786.5K | 0.6% | ▼~0% Reduced · −16 sh | |
| 32 | Alphabet Inc CAP STK CL A | $89.9M | 312.7K | 0.5% | ▼−69% Reduced · −690K sh | |
| 33 | Integer Hldgs Corp COM | $88.0M | 1.00M | 0.5% | ▲New New position | |
| 34 | Intel Corp COM | $84.8M | 1.92M | 0.5% | ▲+42% Added · +565K sh | |
| 35 | Ishares TR RUSSELL 2000 ETF | $84.5M | 340.8K | 0.5% | ▲+51% Added · +116K sh | |
| 36 | Webster Finl Corp COM | $83.3M | 1.20M | 0.5% | ▲New New position | |
| 37 | Vistance Networks Inc COM | $78.0M | 4.28M | 0.5% | ▲+91% Added · +2.0M sh | |
| 38 | Peabody Engr Corp COM | $73.8M | 2.24M | 0.4% | ▲+5.5% Added · +116K sh | |
| 39 | Avis Budget Group Inc COM | $72.9M | 500.0K | 0.4% | ▲+100% Added · +250K sh | |
| 40 | Ishares Bitcoin Trust ETF SHS BEN INT | $72.2M | 1.88M | 0.4% | ▲+65% Added · +738K sh | |
| 41 | Kenvue Inc COM | $70.4M | 4.08M | 0.4% | ▲+219% Added · +2.8M sh | |
| 42 | Citigroup Inc COM NEW | $63.9M | 563.2K | 0.4% | ▲+60% Added · +211K sh | |
| 43 | Eli Lilly & Co COM | $61.6M | 67.0K | 0.4% | ▲+167% Added · +42K sh | |
| 44 | Neogen Corp COM | $60.4M | 6.50M | 0.4% | ▲~0% Added · +180 sh | |
| 45 | Entergy Corp New COM | $59.4M | 528.6K | 0.4% | ▲+25% Added · +107K sh | |
| 46 | Masimo Corp COM | $58.8M | 330.7K | 0.4% | ▲New New position | |
| 47 | JPMorgan Chase & Co COM | $58.2M | 197.8K | 0.3% | ▲+155% Added · +120K sh | |
| 48 | American Healthcare REIT Inc COM SHS | $56.4M | 1.20M | 0.3% | ▼−22% Reduced · −346K sh | |
| 49 | Sempra COM | $55.6M | 571.8K | 0.3% | ▲+11% Added · +55K sh | |
| 50 | Chevron Corporation COM | $55.4M | 267.7K | 0.3% | ▲New New position |
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| PUT · bearish | NVIDIA CORPNVDA | $1.2B | 6.9M |
| PUT · bearish | TESLA INCTSLA | $949.3M | 2.6M |
| PUT · bearish | AMAZON.COM INCAMZN | $898.1M | 4.3M |
| PUT · bearish | ISHARES RUSSELL 2000 ETFIWM | $872.3M | 3.5M |
| PUT · bearish | SS SPDR S&P 500 ETF TRUST-USSPY | $605.5M | 931K |
| PUT · bearish | PALANTIR TECHNOLOGIES INC-APLTR | $585.1M | 4.0M |
| PUT · bearish | NETFLIX INCNFLX | $567.3M | 5.9M |
| PUT · bearish | APPLE INCAAPL | $549.2M | 2.2M |
| PUT · bearish | ADVANCED MICRO DEVICESAMD | $489.8M | 2.4M |
| PUT · bearish | BERKSHIRE HATHAWAY INC-CL BBRK/B | $383.4M | 800K |
| PUT · bearish | MICROSOFT CORPMSFT | $268.4M | 725K |
| PUT · bearish | ISHR IBX USD HIYLD CB ETF-UIHYG | $238.7M | 3.0M |
| PUT · bearish | TAIWAN SEMICONDUCTOR-SP ADRTSM | $226.4M | 670K |
| PUT · bearish | DOLLAR TREE INCDLTR | $219.0M | 2.0M |
| CALL · bullish | NVIDIA CORPNVDA | $216.5M | 1.2M |
| PUT · bearish | UNITEDHEALTH GROUP INCUNH | $189.4M | 700K |
| PUT · bearish | SPDR GOLD SHARESGLD | $173.6M | 403K |
| PUT · bearish | MICRON TECHNOLOGY INCMU | $168.9M | 500K |
| CALL · bullish | AMAZON.COM INCAMZN | $156.5M | 751K |
| PUT · bearish | BROADCOM INCAVGO | $154.8M | 500K |
| CALL · bullish | TESLA INCTSLA | $134.5M | 362K |
| PUT · bearish | ELECTRONIC ARTS INCEA | $133.9M | 657K |
| PUT · bearish | ORACLE CORPORCL | $133.9M | 910K |
| PUT · bearish | SHOPIFY INC - CLASS ASHOP | $130.5M | 1.1M |
| PUT · bearish | ISHARES BITCOIN TRUST ETFIBIT | $126.9M | 3.3M |
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. Showing the largest 25 of 117 option legs.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 13, 2026 | 1,607 | $29.0B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 13, 2026 | 1,279 | $30.3B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Dec 15, 2025 | 1,517 | $30.1B | 13F-HR/A |
| Q2 2025 | Jun 30, 2025 | Aug 18, 2025 | 1,443 | $29.4B | 13F-HR/A |
| Q1 2025 | Mar 31, 2025 | May 14, 2025 | 1,339 | $32.4B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 14, 2025 | 946 | $28.4B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 13, 2024 | 865 | $24.7B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 14, 2024 | 787 | $21.3B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 15, 2024 | 739 | $18.0B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 14, 2024 | 712 | $15.8B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Dec 7, 2023 | 801 | $12.7B | 13F-HR/A |
| Q2 2023 | Jun 30, 2023 | Aug 14, 2023 | 851 | $13.8B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 16, 2023 | 854 | $12.1B | 13F-HR/A |
| Q4 2022 | Dec 31, 2022 | Feb 14, 2023 | 986 | $9.8B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 14, 2022 | 1,231 | $11.3B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 12, 2022 | 1,329 | $13.2B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 16, 2022 | 1,186 | $7.4B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 14, 2022 | 1,085 | $9.8B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Dec 29, 2021 | 991 | $7.4B | 13F-HR/A |
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.