CM
Castleark Management LLC — 13F Portfolio Analysis & Stock Picks (Q2 2026)
Castleark Management LLCCIK: 0001106832
Diversified strategyMomentum followerQuality / disciplined sizing
Total reported value
$3.7B
Reporting period: 2026-06-30 · Number of holdings: 309
CASTLEARK MANAGEMENT LLC disclosed 309 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $3.7B and a quarterly turnover rate of 52.9%.
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Personality snowflake
- Concentration
- 7.25
- Portfolio Stability
- 52.89
- Momentum
- 100
- Sector conviction
- 65.8
- Diversification
- 100
- Sizing Uniformity
- 78.52
Castleark Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.018 — mathematically equivalent to about 55 equally-sized positions, well below its 309 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.15), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim SCHW
-98.1% -$46.5M
Add AMD
+33.6% $51.0M
Add MS
+780.7% $39.7M
Trim SHOP
-71.9% -$26.9M
Add LRCX
-15.7% $51.0M
Trim META
-24.4% -$18.1M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 200 holdings (of 309 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | NVDA | Nvidia CORP | Stock-Tech | 7.01% | -0.25% | +3.31% | |
| 2 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 4.89% | +0.91% | +21.31% | |
| 3 | AAPL | Apple Inc | Stock-Tech | 3.68% | +0.74% | +34.88% | |
| 4 | LRCX | Lam Research CORP | Stock-Tech | 3.32% | +0.94% | -15.72% | |
| 5 | MSFT | Microsoft CORP | Stock-Tech | 2.94% | -0.29% | +10.85% | |
| 6 | LLY | Eli Lilly & Co | Stock-Healthcare | 2.84% | +0.60% | +19.35% | |
| 7 | AVGO | Broadcom Inc | Stock-Tech | 2.48% | +0.40% | +20.32% | |
| 8 | SPIB | Ss Spdr P Int C CORP ETF | ETF-Other | 2.43% | -0.56% | — | |
| 9 | V | Visa Inc-class A Shares | Stock-Financials | 2.18% | +0.64% | +53.53% | |
| 10 | ANET | Arista Networks Inc | Stock-Tech | 2.17% | +0.42% | +9.84% | |
| 11 | GOVT | Ishares US Treasury Bond ETF | ETF-Gov Bonds | 2.04% | -0.48% | — | |
| 12 | VMBS | Vanguard Mortgage-backed Sec | ETF-Other | 1.88% | -0.43% | — | |
| 13 | AMD | Advanced Micro Devices | Stock-Tech | 1.86% | +1.26% | +33.63% | |
| 14 | GILD | Gilead Sciences Inc | Stock-Healthcare | 1.80% | +0.22% | +54.18% | |
| 15 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 1.72% | +0.03% | +9.11% | |
| 16 | GEV | GE Vernova Inc | Stock-Industrials | 1.46% | +0.26% | +11.12% | |
| 17 | META | Meta Platforms Inc-class A | Stock-Comm Services | 1.42% | -0.93% | -24.38% | |
| 18 | ADI | Analog Devices Inc | Stock-Tech | 1.29% | +0.47% | +55.23% | |
| 19 | MA | Mastercard Inc - A | Stock-Financials | 1.27% | -0.25% | -0.60% | |
| 20 | MS | Morgan Stanley | Stock-Financials | 1.18% | +1.05% | +780.67% | |
| 21 | SNOW | Snowflake Inc | Stock-Tech | 1.14% | +0.46% | +22.62% | |
| 22 | VRT | Vertiv Holdings Co-a | Stock-Industrials | 1.12% | +0.19% | +10.27% | |
| 23 | TPR | Tapestry Inc | Stock-Consumer Disc | 1.05% | +0.10% | +29.97% | |
| 24 | SPTS | Ss Spdr P St Term Tsy ETF | ETF-Other | 1.04% | -0.25% | — | |
| 25 | VCLT | Vanguard Long-term CORP Bond | ETF-Corp Bonds | 0.91% | -0.20% | — | |
| 26 | NOW | Servicenow Inc | Stock-Tech | 0.86% | -0.19% | +5.88% | |
| 27 | TLH | Ishares 10-20 Year Treasury | ETF-Gov Bonds | 0.70% | -0.16% | — | |
| 28 | BKNG | Booking Holdings Inc | Stock-Consumer Disc | 0.66% | -0.02% | +2693.63% | |
| 29 | MCO | Moody's CORP | Stock-Financials | 0.65% | +0.41% | +216.24% | |
| 30 | TSLA | Tesla Inc | Stock-Consumer Disc | 0.55% | +0.07% | +22.69% | |
| 31 | CAT | Caterpillar Inc | Stock-Industrials | 0.54% | +0.21% | +36.35% | |
| 32 | GE | General Electric | Stock-Industrials | 0.53% | +0.24% | +72.20% | |
| 33 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 0.53% | +0.07% | — | |
| 34 | LGND | Ligand Pharmaceuticals | Stock-Healthcare | 0.53% | +0.21% | +27.41% | |
| 35 | SN | SharkNinja, Inc. | Stock-Consumer Disc | 0.52% | +0.52% | NEW | |
| 36 | MBB | Ishares Mbs ETF | ETF-Other | 0.52% | -0.12% | — | |
| 37 | TWLO | Twilio Inc - A | Stock-Tech | 0.51% | +0.40% | +245.25% | |
| 38 | BKR | Baker Hughes Co | Stock-Energy | 0.49% | -0.29% | -14.77% | |
| 39 | GTX | Garrett Motion Inc | Stock-Consumer Disc | 0.46% | +0.17% | -3.80% | |
| 40 | JPM | Jpmorgan Chase & Co | Stock-Financials | 0.45% | -0.04% | — | |
| 41 | ✓ | Ascendis Pharma A/s | Stock-Other | 0.44% | +0.44% | NEW | |
| 42 | JBHT | Hunt (jb) Transprt Svcs Inc | Stock-Industrials | 0.44% | +0.28% | +150.09% | |
| 43 | FANG | Diamondback Energy Inc | Stock-Energy | 0.43% | -0.52% | -37.47% | |
| 44 | GM | General Motors Co | Stock-Consumer Disc | 0.41% | +0.17% | +100.89% | |
| 45 | BTSG | Brightspring Health Services | Stock-Other | 0.40% | +0.05% | -14.07% | |
| 46 | SMTC | Semtech CORP | Stock-Tech | 0.40% | +0.13% | -15.35% | |
| 47 | FCFS | Firstcash Holdings Inc | Stock-Financials | 0.40% | -0.04% | -3.59% | |
| 48 | MAR | Marriott International -cl A | Stock-Consumer Disc | 0.38% | +0.29% | +353.47% | |
| 49 | IGIB | Ishares 5-10y Inv Grade CORP | ETF-Corp Bonds | 0.37% | -0.09% | — | |
| 50 | TJX | Tjx Companies Inc | Stock-Consumer Disc | 0.37% | -0.11% | — |
1–50 of 200
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Portfolio Performance
Performance for Q3 2026
-0.1%
Performance Last 4 Quarters
+19.4%
- Stdev
- +15.6%
- Beta
- +1.17
- Alpha
- -5.7%
- Max Drawdown
- -11.7%
- Annualized Perf
- +17.9%
- Batting Avg vs S&P
- +41.7%
- Sortino
- +2.17
- Stutzer
- +0.34
- Treynor
- +0.15
- Sterling
- +1.02
- Calmar
- +1.53
- Information Ratio
- -0.55
- Tracking Error
- +4.1%
- Stdev Down
- +8.2%
- Winning Months %
- +63.9%
- Losing Months %
- +36.1%
- Best 12 Months
- +34.5%
- Worst 12 Months
- -1.6%
- Efficiency Ratio
- +0.47
- Sharpe
- +1.14
- Stdev Sectors
- +10.8%
- Skewness
- +0.09
- Kurtosis
- -0.11
- Upside Potential
- +3.83
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 309 | $3.7B | 53 | ||
| 2026 Q1 | 292 | $3.0B | 49 | ||
| 2025 Q4 | 294 | $3.4B | 44 | ||
| 2025 Q3 | 284 | $3.6B | 74 | ||
| 2025 Q2 | 275 | $3.3B | 0 | ||
| 2025 Q1 | 280 | $2.9B | 100 | ||
| 2024 Q4 | 283 | $2.9B | 0 | ||
| 2024 Q3 | 272 | $2.5B | 0 | ||
| 2024 Q2 | 271 | $2.4B | 0 | ||
| 2024 Q1 | 278 | $2.4B | 0 | ||
| 2023 Q4 | 281 | $2.3B | 0 | ||
| 2023 Q3 | 274 | $2.0B | 0 | ||
| 2023 Q2 | 274 | $2.2B | 0 | ||
| 2023 Q1 | 272 | $2.0B | 0 | ||
| 2022 Q4 | 282 | $1.9B | 0 | ||
| 2022 Q3 | 284 | $1.8B | 0 | ||
| 2022 Q2 | 306 | $1.9B | 0 | ||
| 2022 Q1 | 321 | $2.3B | 0 | ||
| 2021 Q4 | 326 | $2.7B | 0 | ||
| 2021 Q3 | 328 | $2.6B | 0 | ||
| 2021 Q2 | 335 | $3.0B | 36 | ||
| 2021 Q1 | 330 | $2.8B | 46 | ||
| 2020 Q4 | 328 | $2.7B | 41 | ||
| 2020 Q3 | 343 | $2.6B | 48 | ||
| 2020 Q2 | 334 | $2.3B | 93 | ||
| 2020 Q1 | 336 | $1.7B | 80 | ||
| 2019 Q4 | 341 | $2.5B | 56 | ||
| 2019 Q3 | 350 | $2.5B | 62 | ||
| 2019 Q2 | 347 | $2.6B | 63 | ||
| 2019 Q1 | 360 | $2.7B | 65 | ||
| 2018 Q4 | 365 | $2.3B | 71 | ||
| 2018 Q3 | 369 | $3.5B | 54 | ||
| 2018 Q2 | 369 | $3.2B | 63 | ||
| 2018 Q1 | 403 | $3.2B | 49 | ||
| 2017 Q4 | 402 | $3.3B | 48 | ||
| 2017 Q3 | 385 | $3.2B | 57 | ||
| 2017 Q2 | 389 | $3.1B | 56 | ||
| 2017 Q1 | 367 | $3.2B | 53 | ||
| 2016 Q4 | 371 | $3.1B | 62 | ||
| 2016 Q3 | 372 | $3.3B | 54 | ||
| 2016 Q2 | 373 | $3.1B | 48 | ||
| 2016 Q1 | 367 | $3.2B | 63 | ||
| 2015 Q4 | 387 | $3.3B | 57 | ||
| 2015 Q3 | 364 | $3.1B | 58 | ||
| 2015 Q2 | 369 | $3.7B | 52 | ||
| 2015 Q1 | 378 | $4.1B | 89 | ||
| 2014 Q4 | 341 | $3.9B | 100 | ||
| 2014 Q3 | 309 | $3.5B | 65 | ||
| 2014 Q2 | 318 | $3.6B | 65 | ||
| 2014 Q1 | 309 | $3.5B | 82 | ||
| 2013 Q4 | 314 | $3.4B | 100 | ||
| 2013 Q3 | 343 | $3.5B | 100 | ||
| 2013 Q2 | 315 | $3.0B | 0 |
Holding changes this quarter
Castleark Management LLC's most significant position changes for 2026-06-30: Sold out: Ulta Beauty Inc (ULTA); New buy: SharkNinja, Inc. (SN); New buy: Ascendis Pharma A/s; Sold out: Ascendis Pharma A/S (ASND); New buy: Hexcel CORP (HXL).
Showing top 200 changes by size (of 351 total)
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | AMD | Advanced Micro Devices | +1.3% | +33.63% | Add |
| 2 | MS | Morgan Stanley | +1.1% | +780.67% | Add |
| 3 | LRCX | Lam Research CORP | +0.9% | -15.72% | Trim |
| 4 | GOOGL | Alphabet Inc-cl A | +0.9% | +21.31% | Add |
| 5 | AAPL | Apple Inc | +0.7% | +34.88% | Add |
| 6 | V | Visa Inc-class A Shares | +0.6% | +53.53% | Add |
| 7 | LLY | Eli Lilly & Co | +0.6% | +19.35% | Add |
| 8 | SN | SharkNinja, Inc. | +0.5% | NEW | New buy |
| 9 | ADI | Analog Devices Inc | +0.5% | +55.23% | Add |
| 10 | SNOW | Snowflake Inc | +0.5% | +22.62% | Add |
| 11 | ✓ | Ascendis Pharma A/s | +0.4% | NEW | New buy |
| 12 | ANET | Arista Networks Inc | +0.4% | +9.84% | Add |
| 13 | MCO | Moody's CORP | +0.4% | +216.24% | Add |
| 14 | AVGO | Broadcom Inc | +0.4% | +20.32% | Add |
| 15 | TWLO | Twilio Inc - A | +0.4% | +245.25% | Add |
| 16 | MAR | Marriott International -cl A | +0.3% | +353.47% | Add |
| 17 | HXL | Hexcel CORP | +0.3% | NEW | New buy |
| 18 | JBHT | Hunt (jb) Transprt Svcs Inc | +0.3% | +150.09% | Add |
| 19 | CROX | Crocs Inc | +0.3% | NEW | New buy |
| 20 | SXT | Sensient Technologies CORP | +0.3% | NEW | New buy |
| 21 | MXL | Maxlinear Inc | +0.3% | NEW | New buy |
| 22 | ULS | Ul Solutions Inc - Class A | +0.3% | NEW | New buy |
| 23 | GEV | GE Vernova Inc | +0.3% | +11.12% | Add |
| 24 | CWST | Casella Waste Systems Inc-a | +0.3% | NEW | New buy |
| 25 | CDNL | Cardinal Infrastructure Gr-a | +0.3% | NEW | New buy |
| 26 | RAL | Ralliant CORP | +0.3% | NEW | New buy |
| 27 | WSC | Willscot Holdings CORP | +0.3% | NEW | New buy |
| 28 | LTH | Life Time Group Holdings Inc | +0.3% | NEW | New buy |
| 29 | GE | General Electric | +0.2% | +72.20% | Add |
| 30 | XMTR | Xometry Inc-a | +0.2% | +114.57% | Add |
| 31 | OPLN | Openlane Inc | +0.2% | NEW | New buy |
| 32 | WULF | Terawulf Inc | +0.2% | NEW | New buy |
| 33 | AXON | Axon Enterprise Inc | +0.2% | +164.34% | Add |
| 34 | INTC | Intel CORP | +0.2% | NEW | New buy |
| 35 | GILD | Gilead Sciences Inc | +0.2% | +54.18% | Add |
| 36 | NOVT | Novanta Inc | +0.2% | +137.75% | Add |
| 37 | AXP | American Express Co | +0.2% | +920.37% | Add |
| 38 | RUSHA | Rush Enterprises Inc-cl A | +0.2% | NEW | New buy |
| 39 | TGTX | Tg Therapeutics Inc | +0.2% | NEW | New buy |
| 40 | PRAX | Praxis Precision Medicines I | +0.2% | NEW | New buy |
| 41 | FFIV | F5 Inc | +0.2% | +13864.29% | Add |
| 42 | BRKR | Bruker CORP | +0.2% | NEW | New buy |
| 43 | CAT | Caterpillar Inc | +0.2% | +36.35% | Add |
| 44 | LGND | Ligand Pharmaceuticals | +0.2% | +27.41% | Add |
| 45 | MOH | Molina Healthcare Inc | +0.2% | NEW | New buy |
| 46 | PENN | Penn Entertainment Inc | +0.2% | NEW | New buy |
| 47 | VRT | Vertiv Holdings Co-a | +0.2% | +10.27% | Add |
| 48 | HRI | Herc Holdings Inc | +0.2% | NEW | New buy |
| 49 | MSM | Msc Industrial Direct Co-a | +0.2% | NEW | New buy |
| 50 | BA | Boeing Co/the | +0.2% | +128.22% | Add |
1–50 of 200
Filing History
FAQ
What is Castleark Management LLC and what type of investor is it?
Castleark Management LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $3.7B, spread across 309 disclosed positions.
What are Castleark Management LLC's largest equity positions?
Based on the latest 13F filing, Castleark Management LLC's top holdings by market value are:
1. Nvidia CORP (NVDA) — $260.0M (7.0%)
2. Alphabet Inc-cl A (GOOGL) — $181.2M (4.9%)
3. Apple Inc (AAPL) — $136.6M (3.7%)
4. Lam Research CORP (LRCX) — $123.0M (3.3%)
5. Microsoft CORP (MSFT) — $109.2M (2.9%)
What changes did Castleark Management LLC make in its most recent portfolio filing?
In the latest reported quarter, Castleark Management LLC made 195 notable position adjustments: 46 new positions were initiated, 58 existing holdings were added to, 58 positions were partially reduced, and 33 were completely exited. The largest of these moves: Sold out: Ulta Beauty Inc (ULTA); New buy: SharkNinja, Inc. (SN); New buy: Ascendis Pharma A/s; Sold out: Ascendis Pharma A/S (ASND); New buy: Hexcel CORP (HXL)
What sectors does Castleark Management LLC focus on?
Castleark Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 39.9%
• Industrials: 13.6%
• Consumer Discretionary: 11.1%
• Financials: 9.9%
• Health Care: 9.9%
• Communication Services: 7.8%
Investment Profile
Castleark Management LLC returned an annualized 17.9% over the trailing 36 months — underperforming the S&P 500 by 5.7 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.17 (more volatile than the market) and a 42% quarterly batting average against the index.
Its portfolio is broadly diversified and moderately active, with 39.9% of the portfolio concentrated in Information Technology.
Its turnover score has risen from 0 to 53 over the past 4 quarters — a shift toward more active trading.
It has added to its GOOGL position over the past two quarters (+$61.8M, now $181.2M), while trimming SCHW over the same stretch (-$61.3M, still holding $863.6K).
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Developer Access
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REST API
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