CASTLEARK MANAGEMENT LLC
Long book
$3.02B
Q1 2026
Positions
292
Top-10 weight
32%
concentration
Last quarter
+15.1%
SPY +14.8%
Turnover
31%
of book per quarter
Strategy in plain words
auto-generated from filingsCASTLEARK MANAGEMENT LLC is an institutional manager, running a $3.02B US long book across 292 positions.
The portfolio is moderately concentrated (top 10 ≈ 32% of the book). The portfolio is actively managed, with meaningful quarterly turnover. Current anchor positions: NVIDIA CORP, ALPHABET INC-CL A, MICROSOFT CORP, SS SPDR P INT C CORP ETF, APPLE INC.
Over the last 9 quarters its long book ran on average 0.8pp per quarter behind the S&P 500, beating the index in 4 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+4.8%
Q2 2024
+2.3%
Q3 2024
+1.9%
Q4 2024
-9.1%
Q1 2025
+13.7%
Q2 2025
+7.0%
Q3 2025
+1.1%
Q4 2025
-3.7%
Q1 2026
+15.1%
Sector allocation
Technology 43%
Industrials 16%
Healthcare 10%
Consumer discretionary 7%
Services media 7%
Energy 6%
Financials 5%
Other 3%
Long book by quarter
What does CASTLEARK MANAGEMENT own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| NVDA NVIDIA CORP | Technology | 1.3M | $219.4M | 7.3% | -10.7% |
| GOOGL ALPHABET INC-CL A | Technology | 418.0K | $120.2M | 4.0% | +9.5% |
| MSFT MICROSOFT CORP | Technology | 264.1K | $97.8M | 3.2% | -28.5% |
| AAPL APPLE INC | Technology | 350.0K | $88.8M | 2.9% | -9.6% |
| LRCX LAM RESEARCH CORP | Industrials | 336.7K | $71.9M | 2.4% | -9.7% |
| META META PLATFORMS INC-CLASS A | Technology | 124.0K | $70.9M | 2.3% | +1.3% |
| LLY ELI LILLY & CO | Healthcare | 73.5K | $67.6M | 2.2% | -9.9% |
| AVGO BROADCOM INC | Technology | 202.7K | $62.7M | 2.1% | -1.5% |
| ANET ARISTA NETWORKS INC | Technology | 430.9K | $52.9M | 1.8% | +4.8% |
| AMZN AMAZON.COM INC | Consumer discretionary | 245.9K | $51.2M | 1.7% | -47.9% |
| GILD GILEAD SCIENCES INC | Healthcare | 342.1K | $47.7M | 1.6% | +23.4% |
| SCHW SCHWAB (CHARLES) CORP | Financials | 504.1K | $47.4M | 1.6% | -19.0% |
| V VISA INC-CLASS A SHARES | Services media | 153.8K | $46.5M | 1.5% | -9.8% |
| MA MASTERCARD INC - A | Services media | 92.0K | $46.0M | 1.5% | -10.2% |
| SHOP SHOPIFY INC - CLASS A | Technology | 310.6K | $36.8M | 1.2% | -10.1% |
| GEV GE VERNOVA INC | Industrials | 41.5K | $36.2M | 1.2% | -13.1% |
| NOW SERVICENOW INC | Technology | 303.8K | $31.8M | 1.1% | +12.3% |
| TPR TAPESTRY INC | Other | 204.5K | $28.9M | 1.0% | +43.9% |
| FANG DIAMONDBACK ENERGY INC | Energy | 145.0K | $28.7M | 0.9% | New |
| CVX CHEVRON CORP | Energy | 136.6K | $28.3M | 0.9% | New |
| VRT VERTIV HOLDINGS CO-A | Technology | 112.4K | $28.2M | 0.9% | -9.9% |
| ULTA ULTA BEAUTY INC | Consumer discretionary | 50.6K | $26.5M | 0.9% | +1.4% |
| ADI ANALOG DEVICES INC | Technology | 77.9K | $24.8M | 0.8% | +27.4% |
| BKR BAKER HUGHES CO | Industrials | 387.2K | $23.6M | 0.8% | +629.4% |
| BKNG BOOKING HOLDINGS INC | Industrials | 4.9K | $20.6M | 0.7% | -10.5% |
| SNOW SNOWFLAKE INC | Technology | 136.0K | $20.5M | 0.7% | -10.0% |
| RRC RANGE RESOURCES CORP | Energy | 410.5K | $18.5M | 0.6% | +454.6% |
| AMD ADVANCED MICRO DEVICES | Technology | 89.0K | $18.1M | 0.6% | -15.1% |
| CF CF INDUSTRIES HOLDINGS INC | Other | 129.2K | $16.8M | 0.6% | New |
| DOCN DIGITALOCEAN HOLDINGS INC | Technology | 182.2K | $15.6M | 0.5% | -1.5% |
| AEIS ADVANCED ENERGY INDUSTRIES | Technology | 46.6K | $15.0M | 0.5% | -5.1% |
| JPM JPMORGAN CHASE & CO | Financials | 50.5K | $14.9M | 0.5% | +13.2% |
| GH GUARDANT HEALTH INC | Healthcare | 160.3K | $14.8M | 0.5% | -2.9% |
| TSLA TESLA INC | Industrials | 39.2K | $14.6M | 0.5% | +39.4% |
| TJX TJX COMPANIES INC | Consumer discretionary | 90.6K | $14.5M | 0.5% | Held |
| WMT WALMART INC | Consumer discretionary | 113.3K | $14.1M | 0.5% | Held |
| NXT NEXTPOWER INC-CL A | Technology | 114.1K | $13.8M | 0.5% | +8.1% |
| PR PERMIAN RESOURCES CORP-CL A | Energy | 631.0K | $13.5M | 0.4% | New |
| FCFS FIRSTCASH HOLDINGS INC | Consumer discretionary | 70.7K | $13.3M | 0.4% | +15.6% |
| MCHP MICROCHIP TECHNOLOGY INC | Technology | 204.9K | $13.2M | 0.4% | -60.3% |
| VIAV VIAVI SOLUTIONS INC | Technology | 378.6K | $12.6M | 0.4% | +8.4% |
| EQT EQT CORP | Energy | 193.8K | $12.3M | 0.4% | -5.8% |
| UBER UBER TECHNOLOGIES INC | Services media | 169.9K | $12.2M | 0.4% | -45.0% |
| DY DYCOM INDUSTRIES INC | Industrials | 32.5K | $11.0M | 0.4% | -14.8% |
| XOM EXXON MOBIL CORP | Energy | 64.5K | $10.9M | 0.4% | New |
| BTSG BRIGHTSPRING HEALTH SERVICES | Healthcare | 247.2K | $10.5M | 0.3% | +55.9% |
| HLIO HELIOS TECHNOLOGIES INC | Industrials | 160.4K | $10.4M | 0.3% | +9.3% |
| CAT CATERPILLAR INC | Industrials | 13.9K | $9.9M | 0.3% | Held |
| LGND LIGAND PHARMACEUTICALS | Healthcare | 48.7K | $9.7M | 0.3% | -27.0% |
| WMB WILLIAMS COS INC | Utilities | 131.8K | $9.6M | 0.3% | +4.8% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 292 | $3.02B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 13, 2026 | 294 | $3.41B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 17, 2025 | 284 | $3.57B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 18, 2025 | 275 | $3.33B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 280 | $2.89B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 18, 2025 | 283 | $2.87B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 15, 2024 | 272 | $2.45B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 271 | $2.45B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 16, 2024 | 278 | $2.40B | canonical | SEC ↗ |
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