Castleark Management
CHICAGO, ILfiles as CASTLEARK MANAGEMENT LLC
$3.7bn in 309 US stocks at the end of 30 June 2026. The top 10 are 33.9% of the money. It changed about 24.4% of the portfolio this quarter.
Value
$3.7bn
Stocks
309
Top 10 share
33.9%
Turnover
24.4%
What changed this quarter
New
Bought for the first time this quarter.
- SharkNinjaSN0.5% of the fund
- Ascendis Pharma A/SASND0.4% of the fund
- HexcelHXL0.3% of the fund
- CrocsCROX0.3% of the fund
- Sensient TechnologiesSXT0.3% of the fund
- MaxlinearMXL0.3% of the fund
- UL SolutionsULS0.3% of the fund
- Casella Waste SystemsCWST0.3% of the fund
- Cardinal Infrastructure GroupCDNL0.3% of the fund
- RalliantRAL0.3% of the fund
- WillScot HoldingsWSC0.3% of the fund
- Life Time Group HoldingsLTH0.3% of the fund
- OpenlaneOPLN0.2% of the fund
- TerawulfWULF0.2% of the fund
- IntelINTC0.2% of the fund
- Rush EnterprisesRUSHA0.2% of the fund
- TG TherapeuticsTGTX0.2% of the fund
- Praxis Precision MedicinesPRAX0.2% of the fund
- BrukerBRKR0.2% of the fund
- Molina HealthcareMOH0.2% of the fund
- PENN EntertainmentPENN0.2% of the fund
- Herc HoldingsHRI0.2% of the fund
- MSC Industrial DirectMSM0.2% of the fund
- Cava GroupCAVA0.2% of the fund
- Quest DiagnosticsDGX0.2% of the fund
Added
Bought more of a stock they already held.
- NvidiaNVDA7.0% of the fund+3%
- AlphabetGOOGL4.9% of the fund+21%
- AppleAAPL3.7% of the fund+35%
- MicrosoftMSFT2.9% of the fund+11%
- Eli LillyLLY2.8% of the fund+19%
- BroadcomAVGO2.5% of the fund+20%
- VisaV2.2% of the fund+54%
- Arista NetworksANET2.2% of the fund+10%
- Advanced Micro DevicesAMD1.9% of the fund+34%
- Gilead SciencesGILD1.8% of the fund+54%
- Amazon.comAMZN1.7% of the fund+9%
- GE VernovaGEV1.5% of the fund+11%
- Analog DevicesADI1.3% of the fund+55%
- Morgan StanleyMS1.2% of the fund+781%
- SnowflakeSNOW1.1% of the fund+23%
- Vertiv HoldingsVRT1.1% of the fund+10%
- TapestryTPR1.0% of the fund+30%
- ServiceNowNOW0.9% of the fund+6%
- Booking HoldingsBKNG0.7% of the fund+12%
- Moody'sMCO0.7% of the fund+216%
- TeslaTSLA0.5% of the fund+23%
- CaterpillarCAT0.5% of the fund+36%
- General ElectricGE0.5% of the fund+72%
- Ligand PharmaceuticalsLGND0.5% of the fund+27%
- TwilioTWLO0.5% of the fund+245%
Cut
Sold some of their stake.
- Lam ResearchLRCX3.3% of the fund-16%
- Meta PlatformsMETA1.4% of the fund-24%
- Baker HughesBKR0.5% of the fund-15%
- Garrett MotionGTX0.5% of the fund-4%
- Diamondback EnergyFANG0.4% of the fund-37%
- BrightSpring Health ServicesBTSG0.4% of the fund-14%
- SemtechSMTC0.4% of the fund-15%
- FirstCash HoldingsFCFS0.4% of the fund-4%
- Ultra Clean HoldingsUCTT0.4% of the fund-4%
- Element SolutionsESI0.3% of the fund-4%
- Guardant HealthGH0.3% of the fund-50%
- Kulicke & Soffa IndustriesKLIC0.3% of the fund-18%
- Lattice SemiconductorLSCC0.3% of the fund-19%
- Jazz PharmaceuticalsJAZZ0.3% of the fund-4%
- Helios TechnologiesHLIO0.3% of the fund-22%
- Kiniksa Pharmaceuticals InternationalKNSA0.3% of the fund-4%
- VSEVSEC0.3% of the fund-4%
- WalmartWMT0.3% of the fund-19%
- EvercoreEVR0.3% of the fund-4%
- ShopifySHOP0.3% of the fund-72%
- Allegro MicrosystemsALGM0.3% of the fund-4%
- Solstice Advanced MaterialsSOLS0.3% of the fund-4%
- Dycom IndustriesDY0.3% of the fund-42%
- Wesco InternationalWCC0.3% of the fund-4%
- Knight-Swift Transportation HoldingsKNX0.3% of the fund-4%
Sold out
Sold their entire stake.
- Ulta BeautyULTA-100%
- Ascendis Pharma A/SASND-100%
- Five BelowFIVE-100%
- Tutor PeriniTPC-100%
- HasbroHAS-100%
- SPX TechnologiesSPXC-100%
- Phibro Animal HealthPAHC-100%
- Kratos Defense & Security SolutionsKTOS-100%
- AutodeskADSK-100%
- IPG PhotonicsIPGP-100%
- Patrick IndustriesPATK-100%
- Atmus Filtration TechnologiesATMU-100%
- Simpson ManufacturingSSD-100%
- Churchill DownsCHDN-100%
- InterDigitalIDCC-100%
- Onto InnovationONTO-100%
- FastlyFSLY-100%
- Medpace HoldingsMEDP-100%
- Rhythm PharmaceuticalsRYTM-100%
- Ford MotorF-100%
- Manhattan AssociatesMANH-100%
- Iqvia HoldingsIQV-100%
- BEL FuseBELFB-100%
- iRhythm HoldingsIRTC-100%
- Coinbase GlobalCOIN-100%
Holdings
- Spdr Series TrustSPIB
- Share
- 2.4%
- Value
- $90m
- Shares
- 2,688,380
Held
- Ishares TRGOVT
- Share
- 2.0%
- Value
- $76m
- Shares
- 3,329,569
Held
- Vanguard Scottsdale FDSVMBS
- Share
- 1.9%
- Value
- $70m
- Shares
- 1,487,800
Held
- Spdr Series TrustSPTS
- Share
- 1.0%
- Value
- $39m
- Shares
- 1,334,080
Held
- Vanguard Scottsdale FDSVCLT
- Share
- 0.9%
- Value
- $34m
- Shares
- 448,330
Held
- Ishares TRTLH
- Share
- 0.7%
- Value
- $26m
- Shares
- 258,432
Held
- Ishares TRMBB
- Share
- 0.5%
- Value
- $19m
- Shares
- 204,235
Held
- Ishares TRIGIB
- Share
- 0.4%
- Value
- $14m
- Shares
- 259,994
Held
- Spdr Series TrustXBI
- Share
- 0.3%
- Value
- $13m
- Shares
- 80,890
Held
- Ishares TRTLT
- Share
- 0.3%
- Value
- $12m
- Shares
- 137,270
Held
| Company | Share of fund | Value | Shares | Change |
|---|---|---|---|---|
| NvidiaNVDA | 7.0% | $260m | 1,299,605 | +3% |
| AlphabetGOOGL | 4.9% | $181m | 507,093 | +21% |
| AppleAAPL | 3.7% | $137m | 472,108 | +35% |
| Lam ResearchLRCX | 3.3% | $123m | 283,808 | -16% |
| MicrosoftMSFT | 2.9% | $109m | 292,770 | +11% |
| Eli LillyLLY | 2.8% | $105m | 87,697 | +19% |
| BroadcomAVGO | 2.5% | $92m | 243,896 | +20% |
| Spdr Series TrustSPIB | 2.4% | $90m | 2,688,380 | Held |
| VisaV | 2.2% | $81m | 236,166 | +54% |
| Arista NetworksANET | 2.2% | $80m | 473,319 | +10% |
| Ishares TRGOVT | 2.0% | $76m | 3,329,569 | Held |
| Vanguard Scottsdale FDSVMBS | 1.9% | $70m | 1,487,800 | Held |
| Advanced Micro DevicesAMD | 1.9% | $69m | 118,865 | +34% |
| Gilead SciencesGILD | 1.8% | $67m | 527,542 | +54% |
| Amazon.comAMZN | 1.7% | $64m | 268,249 | +9% |
| GE VernovaGEV | 1.5% | $54m | 46,101 | +11% |
| Meta PlatformsMETA | 1.4% | $53m | 93,744 | -24% |
| Analog DevicesADI | 1.3% | $48m | 120,934 | +55% |
| MastercardMA | 1.3% | $47m | 91,462 | Held |
| Morgan StanleyMS | 1.2% | $44m | 208,542 | +781% |
| SnowflakeSNOW | 1.1% | $42m | 166,818 | +23% |
| Vertiv HoldingsVRT | 1.1% | $41m | 123,901 | +10% |
| TapestryTPR | 1.0% | $39m | 265,749 | +30% |
| Spdr Series TrustSPTS | 1.0% | $39m | 1,334,080 | Held |
| Vanguard Scottsdale FDSVCLT | 0.9% | $34m | 448,330 | Held |
| ServiceNowNOW | 0.9% | $32m | 321,623 | +6% |
| Ishares TRTLH | 0.7% | $26m | 258,432 | Held |
| Booking HoldingsBKNG | 0.7% | $24m | 136,776 | +12% |
| Moody'sMCO | 0.7% | $24m | 53,444 | +216% |
| TeslaTSLA | 0.5% | $20m | 48,070 | +23% |
| CaterpillarCAT | 0.5% | $20m | 18,980 | +36% |
| General ElectricGE | 0.5% | $20m | 52,830 | +72% |
| Taiwan Semiconductor ManufacturingTSM | 0.5% | $20m | 41,210 | Held |
| Ligand PharmaceuticalsLGND | 0.5% | $20m | 62,043 | +27% |
| SharkNinjaSN | 0.5% | $19m | 127,170 | New |
| Ishares TRMBB | 0.5% | $19m | 204,235 | Held |
| TwilioTWLO | 0.5% | $19m | 92,390 | +245% |
| Baker HughesBKR | 0.5% | $18m | 330,020 | -15% |
| Garrett MotionGTX | 0.5% | $17m | 469,470 | -4% |
| JPMorgan ChaseJPM | 0.4% | $17m | 50,525 | Held |
| Ascendis Pharma A/SASND | 0.4% | $16m | 61,696 | New |
| Hunt J B Transport ServicesJBHT | 0.4% | $16m | 56,520 | +150% |
| Diamondback EnergyFANG | 0.4% | $16m | 90,680 | -37% |
| General MotorsGM | 0.4% | $15m | 199,440 | +101% |
| BrightSpring Health ServicesBTSG | 0.4% | $15m | 212,430 | -14% |
| SemtechSMTC | 0.4% | $15m | 91,218 | -15% |
| FirstCash HoldingsFCFS | 0.4% | $15m | 68,190 | -4% |
| Marriott InternationalMAR | 0.4% | $14m | 37,910 | +353% |
| Ishares TRIGIB | 0.4% | $14m | 259,994 | Held |
| TJX CompaniesTJX | 0.4% | $14m | 90,620 | Held |
| Uber TechnologiesUBER | 0.4% | $14m | 189,417 | +12% |
| Ultra Clean HoldingsUCTT | 0.4% | $14m | 95,770 | -4% |
| NovantaNOVT | 0.4% | $13m | 83,190 | +138% |
| Axon EnterpriseAXON | 0.4% | $13m | 23,423 | +164% |
| BoeingBA | 0.3% | $13m | 59,520 | +128% |
| Spdr Series TrustXBI | 0.3% | $13m | 80,890 | Held |
| Element SolutionsESI | 0.3% | $13m | 263,644 | -4% |
| MYR GroupMYRG | 0.3% | $12m | 24,920 | +42% |
| Guardant HealthGH | 0.3% | $12m | 80,293 | -50% |
| Ishares TRTLT | 0.3% | $12m | 137,270 | Held |
| JFrogFROG | 0.3% | $12m | 129,480 | +39% |
| CitigroupC | 0.3% | $12m | 83,734 | +76% |
| XPOXPO | 0.3% | $12m | 57,079 | +121% |
| Kulicke & Soffa IndustriesKLIC | 0.3% | $12m | 86,950 | -18% |
| HealthequityHQY | 0.3% | $12m | 127,770 | +163% |
| XometryXMTR | 0.3% | $11m | 117,518 | +115% |
| Lattice SemiconductorLSCC | 0.3% | $11m | 73,979 | -19% |
| Jazz PharmaceuticalsJAZZ | 0.3% | $11m | 46,920 | -4% |
| Helios TechnologiesHLIO | 0.3% | $11m | 125,409 | -22% |
| Kiniksa Pharmaceuticals InternationalKNSA | 0.3% | $11m | 174,032 | -4% |
| Esco TechnologiesESE | 0.3% | $11m | 31,572 | +77% |
| VSEVSEC | 0.3% | $11m | 48,216 | -4% |
| TimkenTKR | 0.3% | $11m | 75,400 | +87% |
| HexcelHXL | 0.3% | $11m | 106,050 | New |
| BorgwarnerBWA | 0.3% | $11m | 158,726 | +7% |
| AARAIR | 0.3% | $11m | 73,664 | +22% |
| WalmartWMT | 0.3% | $10m | 91,570 | -19% |
| CrocsCROX | 0.3% | $10m | 85,810 | New |
| EQTEQT | 0.3% | $10m | 193,845 | Held |
| Sensient TechnologiesSXT | 0.3% | $10m | 82,920 | New |
| MaxlinearMXL | 0.3% | $10m | 79,780 | New |
| Solaris Energy InfrastructureSEI | 0.3% | $10m | 125,806 | +33% |
| EvercoreEVR | 0.3% | $10m | 29,266 | -4% |
| ShopifySHOP | 0.3% | $10m | 87,164 | -72% |
| Allegro MicrosystemsALGM | 0.3% | $10m | 141,900 | -4% |
| UL SolutionsULS | 0.3% | $10m | 96,780 | New |
| Williams CompaniesWMB | 0.3% | $10m | 131,770 | Held |
| Casella Waste SystemsCWST | 0.3% | $10m | 100,460 | New |
| Cardinal Infrastructure GroupCDNL | 0.3% | $10m | 103,023 | New |
| Solstice Advanced MaterialsSOLS | 0.3% | $10m | 108,980 | -4% |
| Dycom IndustriesDY | 0.3% | $10m | 18,816 | -42% |
| RalliantRAL | 0.3% | $9m | 128,740 | New |
| Wesco InternationalWCC | 0.3% | $9m | 27,347 | -4% |
| WillScot HoldingsWSC | 0.3% | $9m | 325,950 | New |
| Knight-Swift Transportation HoldingsKNX | 0.3% | $9m | 120,560 | -4% |
| Life Time Group HoldingsLTH | 0.3% | $9m | 229,298 | New |
| CognexCGNX | 0.3% | $9m | 128,730 | +17% |
| American ExpressAXP | 0.2% | $9m | 27,295 | +920% |
| Associated Banc-CorpASB | 0.2% | $9m | 299,403 | -4% |
| Brookdale Senior LivingBKD | 0.2% | $9m | 570,084 | -5% |
Showing the largest 100 of 309.
Over time and by industry
Value over time
Jun '25
Dec '25
Jun '26
Value is up 11.5% since 30 June 2025.
Where the money is
Technology35.2%
Industrials11.7%
Health care10.3%
Retail & consumer9.6%
Financial services8.1%
Media & telecom6.4%
Energy3.7%
Materials1.4%
Utilities0.9%
Everyday goods0.7%
Real estate0.0%
Other12.1%
From the fund's 13F filings. They list US stocks and options only, 45 days after each quarter, and leave out cash, bonds, shorts and foreign shares.