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Livermore
Livermore
ZHEN

Castleark Management LLC

SEC CIK
0001106832
Latest filing
Aug 14, 2026

Holdings in Q2 2021

Holdings as of Jun 30, 2021, filed Aug 17, 2021. Long positions only; changes compare share counts with Q1 2021.

Institution overview
Positions
335
+5 vs. Q1 2021
Portfolio value
$2.98B
+$199.7M (+7.2%) vs. Q1 2021
Filed
Aug 17, 2021
SEC
Holdings of Castleark Management LLC in Q2 2021
SecurityClassSharesValue% of portfolioShare changeActionHistory
MSFTMicrosoft CorpStock481,655$130.5M4.4%−4,760−1.0%ReducedHistory
AAPLApple Inc.Stock792,320$108.5M3.6%−7,370−0.9%ReducedHistory
AMZNAmazon Com IncStock28,160$96.9M3.3%−1,050−3.6%ReducedHistory
METAMeta Platforms, Inc.Stock222,490$77.4M2.6%−2,060−0.9%ReducedHistory
NVDANVIDIA CorpStock91,772$73.4M2.5%−6,250−6.4%ReducedHistory
LRCXLam Research CorpCOM110,915$72.2M2.4%−7,950−6.7%ReducedHistory
MAMastercard IncStock182,282$66.5M2.2%+19,810+12.2%AddedHistory
NKENIKE, Inc.Stock418,075$64.6M2.2%+17,100+4.3%AddedHistory
PYPLPayPal Holdings, Inc.Stock188,005$54.8M1.8%−1,730−0.9%ReducedHistory
MCHPMicrochip Technology IncStock356,470$53.4M1.8%−3,280−0.9%ReducedHistory
SCHWSchwab Charles CorpStock703,920$51.3M1.7%+195,360+38.4%AddedHistory
VVisa Inc.Stock216,720$50.7M1.7%+51,450+31.1%AddedHistory
HCAHCA Healthcare, Inc.COM238,445$49.3M1.7%−68,010−22.2%ReducedHistory
iShares Tr464287234MSCI EMG MKT ETF868,500$47.9M1.6%00.0%Unchanged–
ASMLASML Holding NVADR66,745$46.1M1.5%−7,840−10.5%ReducedHistory
EWEdwards Lifesciences CorpStock439,285$45.5M1.5%+205,240+87.7%AddedHistory
State Street Financial Select Sector SPDR ETF81369Y605ETF1,234,280$45.3M1.5%00.0%Unchanged–
LVSLas Vegas Sands CorpCOM852,324$44.9M1.5%+62,500+7.9%AddedHistory
ADBEAdobe Inc.Stock75,065$44.0M1.5%−6,180−7.6%ReducedHistory
iShares Russell 1000 Value ETF464287598ETF265,000$42.0M1.4%00.0%Unchanged–
iShares MSCI Eafe ETF464287465ETF530,500$41.8M1.4%00.0%Unchanged–
LLYEli Lilly & CoStock182,290$41.8M1.4%+55,120+43.3%AddedHistory
TSLATesla, Inc.Stock52,248$35.5M1.2%−1,780−3.3%ReducedHistory
State Street Materials Select Sector SPDR ETF81369Y100ETF408,000$33.6M1.1%00.0%Unchanged–
ULTAUlta Beauty, Inc.Stock84,780$29.3M1.0%+84,780NewHistory
ZTSZoetis Inc.Stock153,785$28.7M1.0%−15,850−9.3%ReducedHistory
OLEDUniversal Display CorpCOM127,050$28.2M0.9%+5,100+4.2%AddedHistory
iShares Tr464287630RUS 2000 VAL ETF166,560$27.6M0.9%00.0%Unchanged–
PNCPNC Financial Services Group, Inc.Stock144,730$27.6M0.9%+33,100+29.7%AddedHistory
HDHome Depot, Inc.Stock85,204$27.2M0.9%−38,070−30.9%ReducedHistory
DXCMDexcom IncCOM58,080$24.8M0.8%−520−0.9%ReducedHistory
LUVSouthwest Airlines CoCOM433,910$23.0M0.8%+110,320+34.1%AddedHistory
UNPUnion Pacific CorpStock101,950$22.4M0.8%+101,950NewHistory
MSCIMSCI Inc.Stock42,050$22.4M0.8%−3,010−6.7%ReducedHistory
LULUlululemon athletica inc.Stock60,123$21.9M0.7%−540−0.9%ReducedHistory
State Street SPDR S&P Regional Banking ETF78464A698ETF333,895$21.9M0.7%00.0%Unchanged–
DHRDanaher CorpStock79,925$21.4M0.7%−9,900−11.0%ReducedHistory
SPTSprout Social, Inc.COM CL A208,459$18.6M0.6%−12,530−5.7%ReducedHistory
ZDZiff Davis, Inc.COM121,765$16.7M0.6%+17,515+16.8%AddedHistory
SWAVShockwave Medical, Inc.COM85,539$16.2M0.5%−3,570−4.0%ReducedHistory
FFord Motor CoStock1,027,230$15.3M0.5%−69,950−6.4%ReducedHistory
SPDR Series Trust78468R556SP O&G EXPL PRO157,100$15.2M0.5%+157,100New–
PACKRanpak Holdings Corp.COM CL A601,590$15.1M0.5%+246,755+69.5%AddedHistory
WCCWesco International IncCOM141,629$14.6M0.5%−8,350−5.6%ReducedHistory
HALOHalozyme Therapeutics, Inc.COM317,787$14.4M0.5%−112,815−26.2%ReducedHistory
APPSDigital Turbine, Inc.COM NEW185,282$14.1M0.5%+15,395+9.1%AddedHistory
State Street SPDR S&P Homebuilders ETF78464A888ETF189,100$13.8M0.5%00.0%Unchanged–
ITRIItron, Inc.COM137,815$13.8M0.5%−8,070−5.5%ReducedHistory
VRNSVaronis Systems IncCOM238,014$13.7M0.5%+11,755+5.2%AddedHistory
WSCWillScot Holdings CorpCOM CL A479,954$13.4M0.4%−25,500−5.0%ReducedHistory
ESIElement Solutions IncCOM571,954$13.4M0.4%−33,670−5.6%ReducedHistory
CCitigroup IncStock188,810$13.4M0.4%00.0%UnchangedHistory
GTLSChart Industries IncCOM90,120$13.2M0.4%+4,060+4.7%AddedHistory
SUMSummit Materials, Inc.CL A369,360$12.9M0.4%−21,700−5.5%ReducedHistory
THCTenet Healthcare CorpCOM NEW191,270$12.8M0.4%−11,320−5.6%ReducedHistory
NTRANatera, Inc.COM111,529$12.7M0.4%−6,060−5.2%ReducedHistory
MTSIMACOM Technology Solutions Holdings, Inc.COM196,301$12.6M0.4%−66,720−25.4%ReducedHistory
EEFTEuronet Worldwide, Inc.COM90,891$12.3M0.4%−11,164−10.9%ReducedHistory
CPRICapri Holdings LtdSHS209,718$12.0M0.4%−43,447−17.2%ReducedHistory
SPRSpirit AeroSystems Holdings, Inc.COM CL A248,855$11.7M0.4%−14,630−5.6%ReducedHistory
SGRYSurgery Partners, Inc.Stock174,813$11.6M0.4%−157,246−47.4%ReducedHistory
NTNXNutanix, Inc.Stock303,095$11.6M0.4%+303,095NewHistory
DOMOHuckleberry.ai, Inc.Stock141,455$11.4M0.4%+141,455NewHistory
CSTLCastle Biosciences IncCOM155,437$11.4M0.4%−8,170−5.0%ReducedHistory
GLDSPDR Gold TrustETF68,475$11.3M0.4%00.0%UnchangedHistory
KRNTKornit Digital Ltd.SHS90,595$11.3M0.4%+5,100+6.0%AddedHistory
PARPar Technology CorpCOM157,544$11.0M0.4%−7,510−4.6%ReducedHistory
MXLMaxlinear, IncCOM258,857$11.0M0.4%+47,380+22.4%AddedHistory
BCOBrinks CoCOM141,265$10.9M0.4%−8,350−5.6%ReducedHistory
CNMDCONMED CorpCOM78,442$10.8M0.4%−4,960−5.9%ReducedHistory
GMGeneral Motors CoCOM179,195$10.6M0.4%−12,690−6.6%ReducedHistory
CLHClean Harbors IncCOM112,840$10.5M0.4%−6,640−5.6%ReducedHistory
LFUSLittelfuse IncCOM41,102$10.5M0.4%−3,805−8.5%ReducedHistory
VCELVericel CorpCOM197,790$10.4M0.3%+197,790NewHistory
CVLTCommvault Systems IncCOM132,010$10.3M0.3%+48,995+59.0%AddedHistory
OMCLOmnicell, Inc.COM66,785$10.1M0.3%+66,785NewHistory
LPLALPL Financial Holdings Inc.COM74,245$10.0M0.3%−23,555−24.1%ReducedHistory
SNVSynovus Financial CorpCOM NEW227,330$9.97M0.3%−13,410−5.6%ReducedHistory
RVLVRevolve Group, Inc.CL A144,625$9.96M0.3%−102,705−41.5%ReducedHistory
WMSAdvanced Drainage Systems, Inc.COM83,755$9.76M0.3%+16,945+25.4%AddedHistory
RRXRegal Rexnord CorpCOM72,110$9.63M0.3%+23,200+47.4%AddedHistory
MEDMedifast IncCOM33,980$9.62M0.3%+9,110+36.6%AddedHistory
BLMNBloomin' Brands, Inc.COM353,135$9.58M0.3%−20,780−5.6%ReducedHistory
SKXSkechers USA IncCL A192,330$9.58M0.3%+192,330NewHistory
OPRXOptimizeRx CorpCOM NEW153,932$9.53M0.3%+65,077+73.2%AddedHistory
ROGRogers CorpCOM46,315$9.30M0.3%+9,505+25.8%AddedHistory
BLDRBuilders FirstSource, Inc.Stock217,539$9.28M0.3%−62,542−22.3%ReducedHistory
SHYFShyft Group, Inc.COM247,351$9.25M0.3%−5,850−2.3%ReducedHistory
LNWOLight & Wonder, Inc.COM119,015$9.22M0.3%+18,345+18.2%AddedHistory
SSTKShutterstock, Inc.COM93,132$9.14M0.3%+38,695+71.1%AddedHistory
RCMR1 RCM Holdco Inc.COM408,879$9.09M0.3%+22,899+5.9%AddedHistory
ATRCAtriCure, Inc.COM113,801$9.03M0.3%+113,801NewHistory
MYGNMyriad Genetics IncCOM294,390$9.00M0.3%+15,355+5.5%AddedHistory
COPConocoPhillipsStock143,772$8.76M0.3%+24,000+20.0%AddedHistory
SKYChampion Homes, Inc.Stock163,665$8.72M0.3%+163,665NewHistory
GPREGreen Plains Inc.COM253,292$8.52M0.3%+253,292NewHistory
MASMasco CorpCOM143,800$8.47M0.3%+138,940+2,858.8%AddedHistory
VSATViasat IncCOM169,750$8.46M0.3%−9,990−5.6%ReducedHistory
WWEWorld Wrestling Entertainment, LLCCL A143,462$8.30M0.3%−29,091−16.9%ReducedHistory
SONOSonos IncCOM234,520$8.26M0.3%−13,790−5.6%ReducedHistory

Sold out since Q1 2021 (37)

Positions held at the end of Q1 2021 that are gone from this filing.

Positions of Castleark Management LLC sold out since Q1 2021
SecurityClassShares in Q1 2021Value in Q1 2021% of portfolio in Q1 2021History
CPCanadian Pacific Kansas City LtdCOM88,613$33.6M1.2%History
KSUKansas City SouthernCOM NEW98,350$26.0M0.9%History
NOWServiceNow, Inc.Stock49,202$24.6M0.9%History
TKRTimken CoCOM140,046$11.4M0.4%History
NUANNuance Communications, Inc.COM257,648$11.2M0.4%History
VCYTVeracyte, Inc.COM208,257$11.2M0.4%History
MGNIMagnite, Inc.COM245,191$10.2M0.4%History
ROCKGibraltar Industries, Inc.COM107,484$9.84M0.4%History
EGHT8X8 IncCOM264,105$8.57M0.3%History
Sailpoint Technologies Holdings, Inc.78781P105COM160,539$8.13M0.3%–
OCULOcular Therapeutix, IncCOM485,837$7.97M0.3%History
TPTXTurning Point Therapeutics, Inc.COM77,132$7.30M0.3%History
INSMINSMED IncCOM PAR $.01209,103$7.12M0.3%History
BWINBaldwin Insurance Group, Inc.COM CL A235,474$6.42M0.2%History
RMBSRambus IncCOM318,055$6.18M0.2%History
CLNEClean Energy Fuels Corp.COM387,695$5.33M0.2%History
AQUAEvoqua Water Technologies Corp.COM198,080$5.21M0.2%History
PACBPacific Biosciences of California, Inc.COM141,100$4.70M0.2%History
WKCWorld Kinect CorpCOM131,665$4.63M0.2%History
HYFMHydrofarm Holdings Group, Inc.COM75,900$4.58M0.2%History
LADLithia Motors IncCOM9,174$3.58M0.1%History
QRVOQorvo, Inc.Stock13,830$2.53M0.1%History
TUPTupperware Brands CorpCOM91,990$2.43M0.1%History
GHGuardant Health, Inc.COM13,898$2.12M0.1%History
DKNGDraftKings Inc.COM CL A34,470$2.11M0.1%History
DMTKDermTech, Inc.COM41,330$2.10M0.1%History
LTHMLivent Corp.COM113,185$1.96M0.1%History
PENNPENN Entertainment, Inc.COM18,473$1.94M0.1%History
NVAXNovavax IncCOM NEW8,100$1.47M0.1%History
UPLDUpland Software, Inc.COM26,900$1.27M<0.1%History
Noble Midstream Partners LP65506L105COM UNIT REPST78,446$1.14M<0.1%–
MRVLMarvell Technology, Inc.ORD18,160$889.0K<0.1%History
EDUNew Oriental Education & Technology Group Inc.SPON ADR37,800$529.0K<0.1%History
DHIHorton D R IncCOM5,700$508.0K<0.1%History
KMIKinder Morgan, Inc.Stock26,560$442.0K<0.1%History
Varian Med Sys Inc92220P105COM650$115.0K<0.1%–
ORLYO Reilly Automotive IncStock160$81.0K<0.1%History