CASTLEARK MANAGEMENT LLC — 13F Holdings & Portfolio
CIK 1106832 · latest 13F-HR filed 2026-05-15
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.
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AUM
$3.02B
Long-equity book
Holdings
292
Distinct positions
Period
2026-03-31
Filed 2026-05-15
Q/Q Activity
+53 / −55 / ↑103 / ↓106
vs 2025-12-31
Firm Profile & Key People
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- BAKER HUGHES COMPANY$21.2M +877.9%
- RANGE RES CORP$15.9M +610.6%
- VANGUARD SCOTTSDALE FDS$15.6M +86.8%
- GILEAD SCIENCES INC$13.6M +40.1%
- TAPESTRY INC$10.7M +58.9%
Top Trims
- MICROSOFT CORP-$80.9M -45.3%
- AMAZON COM INC-$57.8M -53.0%
- NVIDIA CORPORATION-$43.2M -16.5%
- ELI LILLY & CO-$20.1M -22.9%
- MICROCHIP TECHNOLOGY INC.-$19.6M -59.7%
New Positions
- DIAMONDBACK ENERGY INC$28.7M
- CHEVRON CORPORATION$28.3M
- CF INDUSTRIES HOLD$16.8M
- PERMIAN RESOURCES CORP$13.5M
- EXXON MOBIL CORP$10.9M
Exited Positions
- BLACKSTONE INC$37.7M
- ISHARES TR$33.4M
- INSULET CORP$23.0M
- SPOTIFY TECHNOLOGY S A$19.4M
- DELTA AIR LINES INC DEL$18.1M
All Holdings
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 | NVIDIA CORPORATION | NVDA | 67066G104 | $219.4M | 7.26% | 1,258,012 | SH |
| 2 | ALPHABET INC | GOOGL | 02079K305 | $120.2M | 3.98% | 418,019 | SH |
| 3 | MICROSOFT CORP | MSFT | 594918104 | $97.8M | 3.23% | 264,102 | SH |
| 4 | SPDR SERIES TRUST | SPIB | 78464A375 | $90.2M | 2.98% | 2,688,380 | SH |
| 5 | APPLE INC | AAPL | 037833100 | $88.8M | 2.94% | 350,011 | SH |
| 6 | ISHARES TR | GOVT | 46429B267 | $76.3M | 2.52% | 3,329,569 | SH |
| 7 | LAM RESEARCH CORP | LRCX | 512807306 | $71.9M | 2.38% | 336,740 | SH |
| 8 | META PLATFORMS INC | META | 30303M102 | $70.9M | 2.35% | 123,965 | SH |
| 9 | VANGUARD SCOTTSDALE FDS | VMBS | 92206C771 | $69.9M | 2.31% | 1,487,800 | SH |
| 10 | ELI LILLY & CO | LLY | 532457108 | $67.6M | 2.24% | 73,478 | SH |
| 11 | BROADCOM INC | AVGO | 11135F101 | $62.7M | 2.08% | 202,704 | SH |
| 12 | ARISTA NETWORKS INC | ANET | 040413205 | $52.9M | 1.75% | 430,935 | SH |
| 13 | AMAZON COM INC | AMZN | 023135106 | $51.2M | 1.69% | 245,861 | SH |
| 14 | GILEAD SCIENCES INC | GILD | 375558103 | $47.7M | 1.58% | 342,150 | SH |
| 15 | SCHWAB CHARLES CORP | SCHW | 808513105 | $47.4M | 1.57% | 504,053 | SH |
| 16 | VISA INC | V | 92826C839 | $46.5M | 1.54% | 153,826 | SH |
| 17 | MASTERCARD INCORPORATED | MA | 57636Q104 | $46.0M | 1.52% | 92,013 | SH |
| 18 | SPDR SERIES TRUST | SPTS | 78468R101 | $38.9M | 1.29% | 1,334,080 | SH |
| 19 | SHOPIFY INC | SHOP | 82509L107 | $36.8M | 1.22% | 310,590 | SH |
| 20 | GE VERNOVA INC | GEV | 36828A101 | $36.2M | 1.20% | 41,489 | SH |
| 21 | VANGUARD SCOTTSDALE FDS | VCLT | 92206C813 | $33.5M | 1.11% | 448,330 | SH |
| 22 | SERVICENOW INC | NOW | 81762P102 | $31.8M | 1.05% | 303,756 | SH |
| 23 | TAPESTRY INC | TPR | 876030107 | $28.9M | 0.95% | 204,470 | SH |
| 24 | DIAMONDBACK ENERGY INC | FANG | 25278X109 | $28.7M | 0.95% | 145,020 | SH |
| 25 | CHEVRON CORPORATION | CVX | 166764100 | $28.3M | 0.93% | 136,550 | SH |
| 26 | VERTIV HOLDINGS CO | VRT | 92537N108 | $28.2M | 0.93% | 112,363 | SH |
| 27 | ULTA BEAUTY INC | ULTA | 90384S303 | $26.5M | 0.88% | 50,629 | SH |
| 28 | ISHARES TR | TLH | 464288653 | $26.0M | 0.86% | 258,432 | SH |
| 29 | ANALOG DEVICES INC | ADI | 032654105 | $24.8M | 0.82% | 77,908 | SH |
| 30 | BAKER HUGHES COMPANY | BKR | 05722G100 | $23.6M | 0.78% | 387,190 | SH |
| 31 | BOOKING HOLDINGS INC | BKNG | 09857L108 | $20.6M | 0.68% | 4,896 | SH |
| 32 | SNOWFLAKE INC | SNOW | 833445109 | $20.5M | 0.68% | 136,044 | SH |
| 33 | ISHARES TR | MBB | 464288588 | $19.4M | 0.64% | 204,235 | SH |
| 34 | RANGE RES CORP | RRC | 75281A109 | $18.5M | 0.61% | 410,520 | SH |
| 35 | ADVANCED MICRO DEVICES INC | AMD | 007903107 | $18.1M | 0.60% | 88,954 | SH |
| 36 | CF INDUSTRIES HOLD | CF | 125269100 | $16.8M | 0.55% | 129,150 | SH |
| 37 | DIGITALOCEAN HLDGS INC | DOCN | 25402D102 | $15.6M | 0.52% | 182,249 | SH |
| 38 | ASCENDIS PHARMA A/S | ASND | 04351P101 | $15.5M | 0.51% | 67,616 | SH |
| 39 | ADVANCED ENERGY INDS | AEIS | 007973100 | $15.0M | 0.50% | 46,623 | SH |
| 40 | JPMORGAN CHASE & CO | JPM | 46625H100 | $14.9M | 0.49% | 50,525 | SH |
| 41 | GUARDANT HEALTH INC | GH | 40131M109 | $14.8M | 0.49% | 160,283 | SH |
| 42 | TESLA INC | TSLA | 88160R101 | $14.6M | 0.48% | 39,180 | SH |
| 43 | TJX COS INC NEW | TJX | 872540109 | $14.5M | 0.48% | 90,620 | SH |
| 44 | WALMART INC | WMT | 931142103 | $14.1M | 0.47% | 113,270 | SH |
| 45 | TAIWAN SEMICONDUCTOR MANUFAC | TSM | 874039100 | $13.9M | 0.46% | 41,210 | SH |
| 46 | ISHARES TR | IGIB | 464288638 | $13.8M | 0.46% | 259,994 | SH |
| 47 | NEXTPOWER INC | NXT | 65290E101 | $13.8M | 0.46% | 114,074 | SH |
| 48 | PERMIAN RESOURCES CORP | PR | 71424F105 | $13.5M | 0.45% | 630,980 | SH |
| 49 | FIRSTCASH HOLDINGS INC | FCFS | 33768G107 | $13.3M | 0.44% | 70,730 | SH |
| 50 | MICROCHIP TECHNOLOGY INC. | MCHP | 595017104 | $13.2M | 0.44% | 204,874 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-15 | $3.02B | 292 | 0001106832-26-000003 |
| 2025-12-31 | 2026-02-13 | $3.41B | 294 | 0001106832-26-000001 |
| 2025-09-30 | 2025-11-17 | $3.57B | 284 | 0001106832-25-000008 |