CASTLEARK MANAGEMENT LLC — 13F Holdings & Portfolio
CIK 1106832 · latest 13F-HR filed 2026-08-14
CASTLEARK MANAGEMENT LLC manages $3.71B in 13F-reported U.S. long-equity assets across 309 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are NVDA (7.01%), GOOGL (4.89%), AAPL (3.68%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 59 new positions, exited 42, added to 134, and trimmed 75.
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.
STE 3950
CHICAGO, IL 60606
$3.71B
Long-equity book
309
Distinct positions
2026-06-30
Filed 2026-08-14
+59 / −42 / ↑134 / ↓75
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- ALPHABET INC$61.0M +50.8%
- LAM RESEARCH CORP$51.0M +70.9%
- ADVANCED MICRO DEVICES INC$51.0M +281.6%
- APPLE INC$47.8M +53.8%
- NVIDIA CORPORATION$40.6M +18.5%
Top Trims
- SCHWAB CHARLES CORP-$46.5M -98.2%
- SHOPIFY INC-$26.9M -73.0%
- CHEVRON CORPORATION-$26.3M -93.0%
- META PLATFORMS INC-$18.1M -25.5%
- DIAMONDBACK ENERGY INC-$12.7M -44.4%
New Positions
- SHARKNINJA INC$19.4M
- ASCENDIS PHARMA A/S$16.5M
- HEXCEL CORP NEW$10.6M
- CROCS INC$10.4M
- SENSIENT TECHNOLOGIES CORP$10.2M
Exited Positions
- ULTA BEAUTY INC$26.5M
- ASCENDIS PHARMA A/S$15.5M
- FIVE BELOW INC$9.2M
- TUTOR PERINI CORP$9.0M
- HASBRO INC$8.9M
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 | $260.0M | 7.01% | 1,299,605 | SH |
| 2 | ALPHABET INC | GOOGL | 02079K305 | $181.2M | 4.89% | 507,093 | SH |
| 3 | APPLE INC | AAPL | 037833100 | $136.6M | 3.68% | 472,108 | SH |
| 4 | LAM RESEARCH CORP | LRCX | 512807306 | $123.0M | 3.32% | 283,808 | SH |
| 5 | MICROSOFT CORP | MSFT | 594918104 | $109.2M | 2.94% | 292,770 | SH |
| 6 | ELI LILLY & CO | LLY | 532457108 | $105.2M | 2.84% | 87,697 | SH |
| 7 | BROADCOM INC | AVGO | 11135F101 | $92.1M | 2.48% | 243,896 | SH |
| 8 | SPDR SERIES TRUST | SPIB | 78464A375 | $90.0M | 2.43% | 2,688,380 | SH |
| 9 | VISA INC | V | 92826C839 | $81.0M | 2.18% | 236,166 | SH |
| 10 | ARISTA NETWORKS INC | ANET | 040413205 | $80.4M | 2.17% | 473,319 | SH |
| 11 | ISHARES TR | GOVT | 46429B267 | $75.8M | 2.04% | 3,329,569 | SH |
| 12 | VANGUARD SCOTTSDALE FDS | VMBS | 92206C771 | $69.6M | 1.88% | 1,487,800 | SH |
| 13 | ADVANCED MICRO DEVICES INC | AMD | 007903107 | $69.0M | 1.86% | 118,865 | SH |
| 14 | GILEAD SCIENCES INC | GILD | 375558103 | $66.6M | 1.80% | 527,542 | SH |
| 15 | AMAZON COM INC | AMZN | 023135106 | $63.9M | 1.72% | 268,249 | SH |
| 16 | GE VERNOVA INC | GEV | 36828A101 | $54.2M | 1.46% | 46,101 | SH |
| 17 | META PLATFORMS INC | META | 30303M102 | $52.8M | 1.42% | 93,744 | SH |
| 18 | ANALOG DEVICES INC | ADI | 032654105 | $48.0M | 1.29% | 120,934 | SH |
| 19 | MASTERCARD INCORPORATED | MA | 57636Q104 | $47.0M | 1.27% | 91,462 | SH |
| 20 | MORGAN STANLEY | MS | 617446448 | $43.6M | 1.18% | 208,542 | SH |
| 21 | SNOWFLAKE INC | SNOW | 833445109 | $42.5M | 1.14% | 166,818 | SH |
| 22 | VERTIV HOLDINGS CO | VRT | 92537N108 | $41.5M | 1.12% | 123,901 | SH |
| 23 | TAPESTRY INC | TPR | 876030107 | $38.9M | 1.05% | 265,749 | SH |
| 24 | SPDR SERIES TRUST | SPTS | 78468R101 | $38.7M | 1.04% | 1,334,080 | SH |
| 25 | VANGUARD SCOTTSDALE FDS | VCLT | 92206C813 | $33.7M | 0.91% | 448,330 | SH |
| 26 | SERVICENOW INC | NOW | 81762P102 | $31.9M | 0.86% | 321,623 | SH |
| 27 | ISHARES TR | TLH | 464288653 | $25.9M | 0.70% | 258,432 | SH |
| 28 | BOOKING HOLDINGS INC | BKNG | 09857L108 | $24.4M | 0.66% | 136,776 | SH |
| 29 | MOODYS CORP | MCO | 615369105 | $24.2M | 0.65% | 53,444 | SH |
| 30 | TESLA INC | TSLA | 88160R101 | $20.2M | 0.55% | 48,070 | SH |
| 31 | CATERPILLAR INC | CAT | 149123101 | $20.2M | 0.54% | 18,980 | SH |
| 32 | GE AEROSPACE | GE | 369604301 | $19.7M | 0.53% | 52,830 | SH |
| 33 | TAIWAN SEMICONDUCTOR MANUFAC | TSM | 874039100 | $19.7M | 0.53% | 41,210 | SH |
| 34 | LIGAND PHARMACEUTICALS INC | LGND | 53220K504 | $19.6M | 0.53% | 62,043 | SH |
| 35 | SHARKNINJA INC | SN | G8068L108 | $19.4M | 0.52% | 127,170 | SH |
| 36 | ISHARES TR | MBB | 464288588 | $19.3M | 0.52% | 204,235 | SH |
| 37 | TWILIO INC | TWLO | 90138F102 | $19.1M | 0.51% | 92,390 | SH |
| 38 | BAKER HUGHES COMPANY | BKR | 05722G100 | $18.3M | 0.49% | 330,020 | SH |
| 39 | GARRETT MOTION INC | GTX | 366505105 | $17.0M | 0.46% | 469,470 | SH |
| 40 | JPMORGAN CHASE & CO | JPM | 46625H100 | $16.5M | 0.45% | 50,525 | SH |
| 41 | ASCENDIS PHARMA A/S | ASND | K08588103 | $16.5M | 0.44% | 61,696 | SH |
| 42 | HUNT J B TRANS SVCS INC | JBHT | 445658107 | $16.4M | 0.44% | 56,520 | SH |
| 43 | DIAMONDBACK ENERGY INC | FANG | 25278X109 | $15.9M | 0.43% | 90,680 | SH |
| 44 | GENERAL MTRS CO | GM | 37045V100 | $15.4M | 0.41% | 199,440 | SH |
| 45 | BRIGHTSPRING HEALTH SVCS INC | BTSG | 10950A106 | $14.8M | 0.40% | 212,430 | SH |
| 46 | SEMTECH CORP | SMTC | 816850101 | $14.8M | 0.40% | 91,218 | SH |
| 47 | FIRSTCASH HOLDINGS INC | FCFS | 33768G107 | $14.8M | 0.40% | 68,190 | SH |
| 48 | MARRIOTT INTL INC NEW | MAR | 571903202 | $14.0M | 0.38% | 37,910 | SH |
| 49 | ISHARES TR | IGIB | 464288638 | $13.8M | 0.37% | 259,994 | SH |
| 50 | TJX COS INC NEW | TJX | 872540109 | $13.7M | 0.37% | 90,620 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $3.71B | 309 | 0001106832-26-000004 |
| 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 |