Castleark Management LLC

In its 13F for Q2 2026 (holdings as of June 30, 2026, filed August 14, 2026), Castleark Management LLC reported 309 stock positions worth $3.7 billion. Its top holding was Nvidia (NVDA) at 7.0% of the portfolio, followed by Alphabet Class A (GOOGL, 4.9%) and Apple (AAPL, 3.7%). Compared with Q1 2026, it opened 57 new positions, sold out of 41, added to 69 and reduced 89. The biggest buy was Advanced Micro Devices (AMD, shares +34%) and the biggest sale Schwab (charles) (SCHW, shares −98%).

Most Recent 13F
Q2 2026
Location
CHICAGO, IL
CIK
0001106832
Portfolio Value
$3.7B (Q2 2026)
SEC Filing
0001106832-26-000004 ↗ filed Aug 14, 2026

Holdings Value

0$1.0B$2.0B$3.0B$4.0B Q1 2024: $2.4B Q1 2024 Q2 2024: $2.4B Q2 2024 Q3 2024: $2.5B Q3 2024 Q4 2024: $2.9B Q4 2024 Q1 2025: $2.9B Q1 2025 Q2 2025: $3.3B Q2 2025 Q3 2025: $3.6B Q3 2025 Q4 2025: $3.4B Q4 2025 Q1 2026: $3.0B Q1 2026 Q2 2026: $3.7B $3.7B Q2 2026

Holdings 309 stocks · $3.7B
NVDA Nvidia Corp. 7.01% 1,299,605 $260.0M Add +3.3%
GOOGL Alphabet Inc. Class A 4.89% 507,093 $181.2M Add +21.3%
AAPL Apple Inc. 3.68% 472,108 $136.6M Add +34.9%
LRCX Lam Research Corp. 3.32% 283,808 $123.0M Reduce -15.7%
MSFT Microsoft Corp. 2.94% 292,770 $109.2M Add +10.8%
LLY Eli Lilly & Co. 2.84% 87,697 $105.2M Add +19.4%
AVGO Broadcom Inc. 2.48% 243,896 $92.1M Add +20.3%
SPIB SS SPDR P Int C Corp. ETF 2.42% 2,688,380 $90.0M No change
V Visa Inc. Class A 2.18% 236,166 $81.0M Add +53.5%
ANET Arista Networks Inc. 2.17% 473,319 $80.4M Add +9.8%
GOVT iShares US Treasury Bond ETF 2.04% 3,329,569 $75.8M No change
VMBS Vanguard Mortgage-Backed Sec 1.88% 1,487,800 $69.6M No change
AMD Advanced Micro Devices 1.86% 118,865 $69.0M Add +33.6%
GILD Gilead Sciences Inc. 1.80% 527,542 $66.6M Add +54.2%
AMZN Amazon.com Inc. 1.72% 268,249 $63.9M Add +9.1%
GEV GE Vernova Inc. 1.46% 46,101 $54.2M Add +11.1%
META Meta Platforms Inc. Class A 1.42% 93,744 $52.8M Reduce -24.4%
ADI Analog Devices Inc. 1.29% 120,934 $48.0M Add +55.2%
MA Mastercard Inc. Class A 1.27% 91,462 $47.0M Reduce -0.6%
MS Morgan Stanley 1.18% 208,542 $43.6M Add +780.7%
SNOW Snowflake Inc. 1.14% 166,818 $42.5M Add +22.6%
VRT Vertiv Holdings Co. Class A 1.12% 123,901 $41.5M Add +10.3%
TPR Tapestry Inc. 1.05% 265,749 $38.9M Add +30.0%
SPTS SS SPDR P St Term TSY ETF 1.04% 1,334,080 $38.7M No change
VCLT Vanguard Long-Term Corp. Bond 0.91% 448,330 $33.7M No change
NOW ServiceNow Inc. 0.86% 321,623 $31.9M Add +5.9%
TLH iShares 10-20 Year Treasury 0.70% 258,432 $25.9M No change
BKNG Booking Holdings Inc. 0.66% 136,776 $24.4M Add +11.8%
MCO Moody's Corp. 0.65% 53,444 $24.2M Add +216.2%
TSLA Tesla Inc. 0.55% 48,070 $20.2M Add +22.7%
CAT Caterpillar Inc. 0.54% 18,980 $20.2M Add +36.4%
GE General Electric filed as GE AEROSPACE 0.53% 52,830 $19.7M Add +72.2%
TSM Taiwan Semiconductor-SP ADR 0.53% 41,210 $19.7M No change
LGND Ligand Pharmaceuticals 0.53% 62,043 $19.6M Add +27.4%
SN Sharkninja Inc. 0.52% 127,170 $19.4M New
MBB iShares MBS ETF 0.52% 204,235 $19.3M No change
TWLO Twilio Inc. Class A 0.51% 92,390 $19.1M Add +245.3%
BKR Baker Hughes Co. 0.49% 330,020 $18.3M Reduce -14.8%
GTX Garrett Motion Inc. 0.46% 469,470 $17.0M Reduce -3.8%
JPM JPMorgan Chase & Co. 0.45% 50,525 $16.5M No change
ASND Ascendis Pharma A/S 0.44% 61,696 $16.5M Reduce -8.8%
JBHT Hunt (jb) Transprt SVCS Inc. 0.44% 56,520 $16.4M Add +150.1%
FANG Diamondback Energy Inc. 0.43% 90,680 $15.9M Reduce -37.5%
GM General Motors Co. 0.41% 199,440 $15.4M Add +100.9%
BTSG Brightspring Health Services 0.40% 212,430 $14.8M Reduce -14.1%
SMTC Semtech Corp. 0.40% 91,218 $14.8M Reduce -15.3%
FCFS Firstcash Holdings Inc. 0.40% 68,190 $14.8M Reduce -3.6%
MAR Marriott International Class A 0.38% 37,910 $14.0M Add +353.5%
IGIB iShares 5-10Y Inv Grade Corp. 0.37% 259,994 $13.8M No change
TJX TJX Companies Inc. filed as TJX COS INC NEW 0.37% 90,620 $13.7M No change
UBER Uber Technologies Inc. 0.37% 189,417 $13.7M Add +11.5%
UCTT Ultra Clean Holdings Inc. 0.37% 95,770 $13.7M Reduce -4.3%
NOVT Novanta Inc. 0.36% 83,190 $13.5M Add +137.8%
AXON Axon Enterprise Inc. 0.35% 23,423 $13.1M Add +164.3%
BA The Boeing Co. 0.35% 59,520 $12.9M Add +128.2%
XBI SS SPDR S&P Biotech ETF 0.35% 80,890 $12.8M No change
ESI Element Solutions Inc. 0.34% 263,644 $12.6M Reduce -3.7%
MYRG MYR Group Inc./Delaware 0.34% 24,920 $12.5M Add +41.9%
GH Guardant Health Inc. 0.32% 80,293 $12.0M Reduce -49.9%
TLT iShares 20+ Year Treasury BD 0.32% 137,270 $11.9M No change
FROG Jfrog Ltd. 0.32% 129,480 $11.8M Add +39.5%
C Citigroup Inc. 0.32% 83,734 $11.7M Add +76.3%
XPO Xpo Inc. 0.32% 57,079 $11.7M Add +120.8%
KLIC Kulicke & Soffa Industries 0.31% 86,950 $11.6M Reduce -18.3%
HQY Healthequity Inc. 0.31% 127,770 $11.5M Add +163.4%
XMTR Xometry Inc. Class A 0.31% 117,518 $11.3M Add +114.6%
LSCC Lattice Semiconductor Corp. 0.31% 73,979 $11.3M Reduce -19.3%
JAZZ Jazz Pharmaceuticals PLC 0.30% 46,920 $11.3M Reduce -3.7%
HLIO Helios Technologies Inc. 0.30% 125,409 $11.2M Reduce -21.8%
KNSA Kiniksa Pharmaceuticals Inte 0.30% 174,032 $11.1M Reduce -4.1%
ESE Esco Technologies Inc. 0.30% 31,572 $11.1M Add +76.8%
VSEC Vse Corp. 0.30% 48,216 $11.0M Reduce -3.7%
TKR Timken Co. 0.30% 75,400 $11.0M Add +86.7%
HXL Hexcel Corp. 0.29% 106,050 $10.6M New
BWA Borgwarner Inc. 0.28% 158,726 $10.5M Add +6.9%
AIR Aar Corp. 0.28% 73,664 $10.5M Add +22.2%
WMT Walmart Inc. 0.28% 91,570 $10.4M Reduce -19.2%
CROX Crocs Inc. 0.28% 85,810 $10.4M New
EQT Eqt Corp. 0.28% 193,845 $10.3M No change
SXT Sensient Technologies Corp. 0.28% 82,920 $10.2M New
MXL Maxlinear Inc. 0.28% 79,780 $10.2M New
SEI Solaris Energy Infrastructur 0.27% 125,806 $10.1M Add +33.5%
EVR Evercore Inc. Class A 0.27% 29,266 $10.0M Reduce -3.8%
SHOP Shopify Inc. Class A 0.27% 87,164 $10.0M Reduce -71.9%
ALGM Allegro Microsystems Inc. 0.27% 141,900 $9.9M Reduce -3.7%
ULS Ul Solutions Inc. Class A 0.27% 96,780 $9.9M New
WMB Williams Cos Inc. 0.26% 131,770 $9.8M No change
CWST Casella Waste Systems Inc. Class A 0.26% 100,460 $9.7M New
CDNL Cardinal Infrastructure GR-A 0.26% 103,023 $9.7M New
SOLS Solstice Adv Materials Inc. 0.26% 108,980 $9.7M Reduce -3.6%
DY Dycom Industries Inc. 0.26% 18,816 $9.5M Reduce -42.1%
RAL Ralliant Corp. 0.26% 128,740 $9.5M New
WCC Wesco International Inc. 0.25% 27,347 $9.4M Reduce -3.7%
WSC Willscot Holdings Corp. 0.25% 325,950 $9.4M New
KNX Knight-Swift Transportation 0.25% 120,560 $9.4M Reduce -4.3%
LTH Life Time Group Holdings Inc. 0.25% 229,298 $9.4M New
CGNX Cognex Corp. 0.25% 128,730 $9.3M Add +16.8%
AXP American Express Co. 0.25% 27,295 $9.2M Add +920.4%
ASB Associated Banc-Corp. 0.25% 299,403 $9.2M Reduce -3.9%
BKD Brookdale Senior Living Inc. 0.25% 570,084 $9.2M Reduce -4.7%

Show all 309 holdings

Portfolio Sells Q1 2026 → Q2 2026
SCHW Schwab (charles) Corp. Reduce -98.1% 0.02% −1.54
SHOP Shopify Inc. Class A Reduce -71.9% 0.27% −0.95
META Meta Platforms Inc. Class A Reduce -24.4% 1.42% −0.92
CVX Chevron Corp. Reduce -91.3% 0.05% −0.88
ULTA Ulta Beauty Inc. Sold out 0.00% −0.88
FANG Diamondback Energy Inc. Reduce -37.5% 0.43% −0.52
RRC Range Resources Corp. Reduce -50.0% 0.21% −0.41
NXT Nextpower Inc. Reduce -84.8% 0.06% −0.40
VIAV Viavi Solutions Inc. Reduce -94.7% 0.03% −0.39
DOCN Digitalocean Holdings Inc. Reduce -80.5% 0.15% −0.37
MCHP Microchip Technology Inc. Reduce -83.4% 0.08% −0.35
CF CF Industries Holdings Inc. Reduce -43.0% 0.21% −0.34
AEIS Advanced Energy Industries Reduce -65.3% 0.16% −0.34
PR Permian Resources Corp. Class A Reduce -57.1% 0.13% −0.31
FIVE Five Below Sold out 0.00% −0.30
TPC Tutor Perini Corp. Sold out 0.00% −0.30
HAS Hasbro Inc. Sold out 0.00% −0.29
BKR Baker Hughes Co. Reduce -14.8% 0.49% −0.29
XOM Exxon Mobil Corp. Reduce -68.7% 0.07% −0.29
TSEM Tower Semiconductor Ltd. Reduce -93.1% 0.03% −0.28
SPXC SPX Technologies Inc. Sold out 0.00% −0.28
PAHC Phibro Animal Health Corp. Class A Sold out 0.00% −0.26
KTOS Kratos Defense & Security Sold out 0.00% −0.26
MA Mastercard Inc. Class A Reduce -0.6% 1.27% −0.25
ADSK Autodesk Inc. Sold out 0.00% −0.25
BE Bloom Energy Corp. Class A Reduce -97.3% 0.01% −0.23
FTI Technipfmc PLC Reduce -67.0% 0.08% −0.23
IPGP Ipg Photonics Corp. Sold out 0.00% −0.23
PATK Patrick Industries Inc. Sold out 0.00% −0.23
STRL Sterling Infrastructure Inc. Reduce -87.7% 0.06% −0.23
XOP SS SPDR S&P Og Exp & Prod Reduce -74.7% 0.05% −0.23
ATMU Atmus Filtration Technologie Sold out 0.00% −0.22
SSD Simpson Manufacturing Co. Inc. Sold out 0.00% −0.22
GOOG Alphabet Inc. Class C Reduce -76.4% 0.07% −0.21
ACA Arcosa Inc. Reduce -81.1% 0.06% −0.21
CHDN Churchill Downs Inc. Sold out 0.00% −0.20
IDCC Interdigital Inc. Sold out 0.00% −0.20
ONTO Onto Innovation Inc. Sold out 0.00% −0.20
ODFL Old Dominion Freight Line Reduce -84.8% 0.03% −0.19
WMT Walmart Inc. Reduce -19.2% 0.28% −0.19
FSLY Fastly Inc. Class A Sold out 0.00% −0.17
SITM Sitime Corp. Reduce -90.3% 0.03% −0.17
GH Guardant Health Inc. Reduce -49.9% 0.32% −0.17
EUAD Select Stoxx Eur Aer DE ETF Reduce -79.0% 0.04% −0.16
MEDP Medpace Holdings Inc. Sold out 0.00% −0.16
TOL Toll Brothers Inc. Reduce -67.8% 0.07% −0.16
TTMI TTM Technologies Reduce -69.2% 0.14% −0.15
RYTM Rhythm Pharmaceuticals Inc. Sold out 0.00% −0.15
F Ford Motor Co. Sold out 0.00% −0.15
MANH Manhattan Associates Inc. Sold out 0.00% −0.13

Portfolio Buys Q1 2026 → Q2 2026
AMD Advanced Micro Devices Add +33.6% 1.86% +1.26
MS Morgan Stanley Add +780.7% 1.18% +1.05
GOOGL Alphabet Inc. Class A Add +21.3% 4.89% +0.91
AAPL Apple Inc. Add +34.9% 3.68% +0.74
V Visa Inc. Class A Add +53.5% 2.18% +0.65
LLY Eli Lilly & Co. Add +19.4% 2.84% +0.60
SN Sharkninja Inc. New 0.52% +0.52
ADI Analog Devices Inc. Add +55.2% 1.29% +0.47
SNOW Snowflake Inc. Add +22.6% 1.14% +0.47
ANET Arista Networks Inc. Add +9.8% 2.17% +0.42
MCO Moody's Corp. Add +216.2% 0.65% +0.41
AVGO Broadcom Inc. Add +20.3% 2.48% +0.41
TWLO Twilio Inc. Class A Add +245.3% 0.51% +0.40
MAR Marriott International Class A Add +353.5% 0.38% +0.29
HXL Hexcel Corp. New 0.29% +0.29
JBHT Hunt (jb) Transprt SVCS Inc. Add +150.1% 0.44% +0.28
CROX Crocs Inc. New 0.28% +0.28
SXT Sensient Technologies Corp. New 0.28% +0.28
MXL Maxlinear Inc. New 0.28% +0.28
ULS Ul Solutions Inc. Class A New 0.27% +0.27
CWST Casella Waste Systems Inc. Class A New 0.26% +0.26
GEV GE Vernova Inc. Add +11.1% 1.46% +0.26
CDNL Cardinal Infrastructure GR-A New 0.26% +0.26
RAL Ralliant Corp. New 0.26% +0.26
WSC Willscot Holdings Corp. New 0.25% +0.25
LTH Life Time Group Holdings Inc. New 0.25% +0.25
GE General Electric Add +72.2% 0.53% +0.24
OPLN Openlane Inc. New 0.24% +0.24
WULF Terawulf Inc. New 0.24% +0.24
XMTR Xometry Inc. Class A Add +114.6% 0.31% +0.23
INTC Intel Corp. New 0.23% +0.23
AXON Axon Enterprise Inc. Add +164.3% 0.35% +0.23
NOVT Novanta Inc. Add +137.8% 0.36% +0.23
RUSHA Rush Enterprises Inc. Class A New 0.22% +0.22
TGTX TG Therapeutics Inc. New 0.22% +0.22
AXP American Express Co. Add +920.4% 0.25% +0.22
PRAX Praxis Precision Medicines I New 0.22% +0.22
GILD Gilead Sciences Inc. Add +54.2% 1.80% +0.22
CAT Caterpillar Inc. Add +36.4% 0.54% +0.22
FFIV F5 Inc. Add +13864.3% 0.22% +0.22
BRKR Bruker Corp. New 0.22% +0.22
MOH Molina Healthcare Inc. New 0.21% +0.21
LGND Ligand Pharmaceuticals Add +27.4% 0.53% +0.21
PENN Penn Entertainment Inc. New 0.20% +0.20
HRI Herc Holdings Inc. New 0.19% +0.19
MSM MSC Industrial Direct Co. Class A New 0.19% +0.19
VRT Vertiv Holdings Co. Class A Add +10.3% 1.12% +0.19
CAVA Cava Group Inc. New 0.18% +0.18
DGX Quest Diagnostics Inc. New 0.18% +0.18
HQY Healthequity Inc. Add +163.4% 0.31% +0.18

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 309$3.7BNVDA, GOOGL, AAPL, LRCX, MSFT
Q1 2026 292$3.0BNVDA, GOOGL, MSFT, SPIB, AAPL
Q4 2025 294$3.4BNVDA, MSFT, GOOGL, AMZN, AAPL
Q3 2025 284$3.6BCARK, NVDA, MSFT, META, AAPL
Q2 2025 275$3.3BCARK, NVDA, MSFT, AMZN, META
Q1 2025 280$2.9BCARK, AAPL, NVDA, AMZN, MSFT
Q4 2024 283$2.9BAAPL, NVDA, MSFT, SPIB, AMZN
Q3 2024 272$2.5BMSFT, NVDA, AAPL, AMZN, GOOGL
Q2 2024 271$2.4BNVDA, MSFT, AAPL, AMZN, GOOGL
Q1 2024 278$2.4BMSFT, NVDA, AAPL, AMZN, META