Castleark Management Llc
Institutional manager — quarterly 13F holdings, Q ending 2026-03-31
Reported value
$3.02B
Q ending 2026-03-31
Prior quarter
$3.41B
Q ending 2025-12-31
Change
-11.3% QoQ · +4.7% YoY
Positions
292
reported holdings
Largest positions
Top 100 of 292 reported positions by value, Q ending 2026-03-31. A manager can hold shares, calls and puts on the same security at once — such positions are listed as separate rows. Type: Shares = common stock, Put/Call = option positions (valued at the underlying), Principal = debt. Tickers link to stock pages where covered.
| Holding | Ticker | Type | Value ▼ | Shares |
|---|---|---|---|---|
| Nvidia Corporation | NVDA | Shares | $219.4M | 1.3M |
| Alphabet Inc | GOOGL | Shares | $120.2M | 418K |
| Microsoft Corp | MSFT | Shares | $97.8M | 264K |
| Spdr Series Trust | SPIB | Shares | $90.2M | 2.7M |
| Apple Inc | AAPL | Shares | $88.8M | 350K |
| Ishares Tr | GOVT | Shares | $76.3M | 3.3M |
| Lam Research Corp | LRCX | Shares | $71.9M | 337K |
| Meta Platforms Inc | META | Shares | $70.9M | 124K |
| Vanguard Scottsdale Fds | VMBS | Shares | $69.9M | 1.5M |
| Eli Lilly & Co | LLY | Shares | $67.6M | 73K |
| Broadcom Inc | AVGO | Shares | $62.7M | 203K |
| Arista Networks Inc | ANET | Shares | $52.9M | 431K |
| Amazon Com Inc | AMZN | Shares | $51.2M | 246K |
| Gilead Sciences Inc | GILD | Shares | $47.7M | 342K |
| Schwab Charles Corp | SCHW | Shares | $47.4M | 504K |
| Visa Inc | V | Shares | $46.5M | 154K |
| Mastercard Incorporated | MA | Shares | $46.0M | 92K |
| Spdr Series Trust | SPTS | Shares | $38.9M | 1.3M |
| Shopify Inc | SHOP | Shares | $36.8M | 311K |
| Ge Vernova Inc | GEV | Shares | $36.2M | 41K |
| Vanguard Scottsdale Fds | VCLT | Shares | $33.5M | 448K |
| Servicenow Inc | NOW | Shares | $31.8M | 304K |
| Tapestry Inc | TPR | Shares | $28.9M | 204K |
| Diamondback Energy Inc | FANG | Shares | $28.7M | 145K |
| Chevron Corporation | CVX | Shares | $28.3M | 137K |
| Vertiv Holdings Co | VRT | Shares | $28.2M | 112K |
| Ulta Beauty Inc | ULTA | Shares | $26.5M | 51K |
| Ishares Tr | TLH | Shares | $26.0M | 258K |
| Analog Devices Inc | ADI | Shares | $24.8M | 78K |
| Baker Hughes Company | BKR | Shares | $23.6M | 387K |
| Booking Holdings Inc | BKNG | Shares | $20.6M | 5K |
| Snowflake Inc | SNOW | Shares | $20.5M | 136K |
| Ishares Tr | MBB | Shares | $19.4M | 204K |
| Range Res Corp | RRC | Shares | $18.5M | 411K |
| Advanced Micro Devices Inc | AMD | Shares | $18.1M | 89K |
| Cf Industries Hold | CF | Shares | $16.8M | 129K |
| Digitalocean Hldgs Inc | DOCN | Shares | $15.6M | 182K |
| Ascendis Pharma A/S | Shares | $15.5M | 68K | |
| Advanced Energy Inds | AEIS | Shares | $15.0M | 47K |
| Jpmorgan Chase & Co | JPM | Shares | $14.9M | 51K |
| Guardant Health Inc | GH | Shares | $14.8M | 160K |
| Tesla Inc | TSLA | Shares | $14.6M | 39K |
| Tjx Cos Inc New | TJX | Shares | $14.5M | 91K |
| Walmart Inc | WMT | Shares | $14.1M | 113K |
| Taiwan Semiconductor Manufac | TSM | Shares | $13.9M | 41K |
| Ishares Tr | IGIB | Shares | $13.8M | 260K |
| Nextpower Inc | NXT | Shares | $13.8M | 114K |
| Permian Resources Corp | PR | Shares | $13.5M | 631K |
| Firstcash Holdings Inc | FCFS | Shares | $13.3M | 71K |
| Microchip Technology Inc. | MCHP | Shares | $13.2M | 205K |
| Viavi Solutions Inc | VIAV | Shares | $12.6M | 379K |
| Eqt Corp | EQT | Shares | $12.3M | 194K |
| Uber Technologies Inc | UBER | Shares | $12.2M | 170K |
| Ishares Tr | TLT | Shares | $11.9M | 137K |
| Dycom Inds Inc | DY | Shares | $11.0M | 33K |
| Exxon Mobil Corp | XOM | Shares | $10.9M | 64K |
| Brightspring Health Svcs Inc | BTSG | Shares | $10.5M | 247K |
| Helios Technologies Inc | HLIO | Shares | $10.4M | 160K |
| Spdr Series Trust | XBI | Shares | $10.3M | 81K |
| Caterpillar Inc | CAT | Shares | $9.9M | 14K |
| Ligand Pharmaceuticals Inc | LGND | Shares | $9.7M | 49K |
| Williams Cos Inc | WMB | Shares | $9.6M | 132K |
| Element Solutions Inc | ESI | Shares | $9.4M | 274K |
| Technipfmc Plc | Shares | $9.3M | 135K | |
| Tower Semiconductor Ltd | Shares | $9.3M | 53K | |
| Vse Corp | VSEC | Shares | $9.2M | 50K |
| Jazz Pharmaceuticals Plc | Shares | $9.2M | 49K | |
| Five Below Inc | FIVE | Shares | $9.2M | 40K |
| Evercore Inc | EVR | Shares | $9.1M | 30K |
| Tutor Perini Corp | TPC | Shares | $9.0M | 116K |
| Ttm Technologies Inc | TTMI | Shares | $8.9M | 91K |
| Garrett Motion Inc | GTX | Shares | $8.9M | 488K |
| Hasbro Inc | HAS | Shares | $8.9M | 95K |
| Kiniksa Pharmaceuticals Intl | Shares | $8.7M | 182K | |
| Ge Aerospace | GE | Shares | $8.7M | 31K |
| Sterling Infrastructure Inc | STRL | Shares | $8.6M | 21K |
| Solstice Advanced Matls Inc | SOLS | Shares | $8.6M | 113K |
| Elanco Animal Health Inc | ELAN | Shares | $8.5M | 356K |
| Lattice Semiconductor Corp | LSCC | Shares | $8.5M | 92K |
| Alphabet Inc | GOOG | Shares | $8.5M | 30K |
| Spx Technologies Inc | SPXC | Shares | $8.3M | 42K |
| Semtech Corp | SMTC | Shares | $8.3M | 108K |
| Spdr Series Trust | XOP | Shares | $8.2M | 45K |
| Select Sector Spdr Tr | XLV | Shares | $8.2M | 56K |
| Modine Mfg Co | MOD | Shares | $8.2M | 38K |
| Brookdale Sr Living Inc | BKD | Shares | $8.2M | 598K |
| Krystal Biotech Inc | KRYS | Shares | $8.2M | 32K |
| Api Group Corp | APG | Shares | $8.1M | 200K |
| Borgwarner Inc | BWA | Shares | $8.1M | 149K |
| Associated Banc-Corp | ASB | Shares | $8.1M | 311K |
| Planet Labs Pbc | PL | Shares | $8.0M | 286K |
| Arcosa Inc | ACA | Shares | $7.9M | 75K |
| Phibro Animal Health Corp | PAHC | Shares | $7.9M | 143K |
| Wesco Intl Inc | WCC | Shares | $7.8M | 28K |
| Kratos Defense & Sec Solutio | KTOS | Shares | $7.7M | 110K |
| Autodesk Inc | ADSK | Shares | $7.6M | 32K |
| Liberty Energy Inc | LBRT | Shares | $7.6M | 265K |
| Stifel Finl Corp | SF | Shares | $7.5M | 102K |
| Bloom Energy Corp | BE | Shares | $7.5M | 55K |
| General Mtrs Co | GM | Shares | $7.4M | 99K |
Values as reported in public regulatory filings (USD); holdings are reported quarterly, up to 45 days after quarter end, and may contain reporting errors. Nothing here is investment advice.