Castleark Management LLC

13F filer · CIK 0001106832

Reported Aug 14, 2026

Net buyer this quarter

13F portfolio value$3.71BU.S. long equity reported on 13F

Positions28054 new · 41 closed

Net flow last quarter+$158MBuys minus sells

Top 10 positions weight33.4%Concentration

Holdings

13F · last 4 quarters free

Scroll for earlier quarters

Company	Value	% of portfolio	% of company	POSITION CHANGE qoq %	First reported
Q2 2026Reported Aug 14, 2026280 positions
NVDANvidia Corp	$260M	7.01%	0.01%	+3.3%	Q1 2020
GOOGLAlphabet Inc.	$181M	4.89%	0.00%	+21.3%	Q4 2015
AAPLApple Inc.	$137M	3.68%	0.00%	+34.9%	Q2 2013
LRCXLam Research Corp	$123M	3.32%	0.02%	-15.7%	Q1 2018
MSFTMicrosoft Corp	$109M	2.94%	0.00%	+10.9%	Q2 2013
LLYELI LILLY & Co	$105M	2.84%	0.01%	+19.4%	Q3 2018
AVGOBroadcom Inc.	$92.1M	2.48%	0.01%	+20.3%	Q2 2016
VVisa Inc.	$81M	2.18%	0.01%	+53.5%	Q4 2014
ANETArista Networks, Inc.	$80.4M	2.17%	0.04%	+9.8%	Q3 2017
AMDAdvanced Micro Devices Inc	$69M	1.86%	0.01%	+33.6%	Q1 2017
GILDGilead Sciences, Inc.	$66.6M	1.80%	0.04%	+54.2%	Q2 2013
AMZNAmazon Com Inc	$63.9M	1.72%	0.00%	+9.1%	Q2 2013
GEVGE Vernova Inc.	$54.2M	1.46%	0.02%	+11.1%	Q3 2024
METAMeta Platforms, Inc.	$52.8M	1.42%	Not reported	-24.4%	Q3 2013
ADIAnalog Devices Inc	$48M	1.29%	0.02%	+55.2%	Q2 2024
MAMastercard Inc	$47M	1.27%	0.01%	-0.6%	Q2 2013
MSMorgan Stanley	$43.6M	1.18%	0.01%	+780.7%	Q2 2015
SNOWSnowflake Inc.	$42.5M	1.14%	0.05%	+22.6%	Q2 2025
VRTVertiv Holdings Co	$41.5M	1.12%	0.03%	+10.3%	Q4 2022
TPRTapestry, Inc.	$38.9M	1.05%	0.13%	+30.0%	Q1 2018
SPTSSports Media Inc	$38.7M	1.04%	Not reported	Not reported	Q4 2024
NOWServiceNow, Inc.	$31.9M	0.86%	0.03%	+5.9%	Q4 2014
BKNGBooking Holdings Inc.	$24.4M	0.66%	0.02%	+11.8%	Q2 2025
MCOMoodys Corp	$24.2M	0.65%	0.03%	+216.2%	Q1 2026
TSLATesla, Inc.	$20.2M	0.55%	0.00%	+22.7%	Q2 2017
CATCaterpillar Inc	$20.2M	0.54%	0.00%	+36.4%	Q2 2013
GEGeneral Electric Co	$19.7M	0.53%	0.01%	+72.2%	Q1 2025
TSMTaiwan Semiconductor Manufacturing Co Ltd	$19.7M	0.53%	0.00%	Not reported	Q2 2016
LGNDLigand Pharmaceuticals Inc	$19.6M	0.53%	0.31%	+27.4%	Q2 2013
SNSharkNinja, Inc.	$19.4M	0.52%	0.09%	New	Q2 2026
TWLOTwilio Inc	$19.1M	0.51%	0.06%	+245.3%	Q2 2018
BKRBaker Hughes Co	$18.3M	0.49%	0.03%	-14.8%	Q3 2021
GTXGarrett Motion Inc.	$17M	0.46%	0.25%	-3.8%	Q4 2025
JPMJPMorgan Chase & Co	$16.5M	0.45%	0.00%	Not reported	Q2 2015
ASNDAscendis Pharma A/S	$16.5M	0.44%	0.10%	-8.8%	Q2 2019
JBHTHunt J B Transport Services Inc	$16.4M	0.44%	0.06%	+150.1%	Q2 2013
FANGDiamondback Energy, Inc.	$15.9M	0.43%	0.03%	-37.5%	Q3 2013
GMGeneral Motors Co	$15.4M	0.41%	0.02%	+100.9%	Q1 2021
BTSGBrightSpring Health Services, Inc.	$14.8M	0.40%	0.11%	-14.1%	Q4 2025
SMTCSemtech Corp	$14.8M	0.40%	0.10%	-15.4%	Q2 2018
FCFSFirstCash Holdings, Inc.	$14.8M	0.40%	0.16%	-3.6%	Q4 2018
MARMarriott International Inc	$14M	0.38%	0.01%	+353.5%	Q2 2017
TJXTJX Companies Inc	$13.7M	0.37%	0.01%	Not reported	Q2 2013
UBERUber Technologies, Inc	$13.7M	0.37%	0.01%	+11.5%	Q1 2024
UCTTUltra Clean Holdings, Inc.	$13.7M	0.37%	0.21%	-4.4%	Q2 2021
NOVTNovanta Inc	$13.5M	0.36%	0.23%	+137.8%	Q1 2018
AXONAxon Enterprise, Inc.	$13.1M	0.35%	0.03%	+164.3%	Q1 2018
BABoeing Co	$12.9M	0.35%	0.01%	+128.2%	Q2 2013
ESIElement Solutions Inc	$12.6M	0.34%	0.11%	-3.7%	Q2 2020
MYRGMyr Group Inc.	$12.5M	0.34%	0.16%	+41.9%	Q1 2023

Q1 2026Reported May 15, 2026266 positions
NVDANvidia Corp	$219M	7.26%	0.01%	-10.7%	Q1 2020
GOOGLAlphabet Inc.	$120M	3.98%	0.00%	+9.5%	Q4 2015
MSFTMicrosoft Corp	$97.8M	3.23%	0.00%	-28.5%	Q2 2013
AAPLApple Inc.	$88.8M	2.94%	0.00%	-9.6%	Q2 2013
LRCXLam Research Corp	$71.9M	2.38%	0.03%	-9.7%	Q1 2018
METAMeta Platforms, Inc.	$70.9M	2.35%	Not reported	+1.3%	Q3 2013
LLYELI LILLY & Co	$67.6M	2.24%	0.01%	-9.9%	Q3 2018
AVGOBroadcom Inc.	$62.7M	2.08%	0.00%	-1.5%	Q2 2016
ANETArista Networks, Inc.	$52.9M	1.75%	0.03%	+4.8%	Q3 2017
AMZNAmazon Com Inc	$51.2M	1.69%	0.00%	-47.9%	Q2 2013
GILDGilead Sciences, Inc.	$47.7M	1.58%	0.03%	+23.4%	Q2 2013
SCHWSchwab Charles Corp	$47.4M	1.57%	0.03%	-19.0%	Q3 2013
VVisa Inc.	$46.5M	1.54%	0.01%	-9.8%	Q4 2014
MAMastercard Inc	$46M	1.52%	0.01%	-10.2%	Q2 2013
SPTSSports Media Inc	$38.9M	1.29%	Not reported	Not reported	Q4 2024
SHOPShopify Inc.	$36.8M	1.22%	0.08%	-10.1%	Q3 2016
GEVGE Vernova Inc.	$36.2M	1.20%	0.02%	-13.1%	Q3 2024
NOWServiceNow, Inc.	$31.8M	1.05%	0.03%	+12.3%	Q4 2014
TPRTapestry, Inc.	$28.9M	0.95%	0.10%	+43.9%	Q1 2018
FANGDiamondback Energy, Inc.	$28.7M	0.95%	0.05%	Not reported	Q3 2013
CVXChevron Corp	$28.3M	0.93%	0.01%	Not reported	Q2 2013
VRTVertiv Holdings Co	$28.2M	0.93%	0.03%	-9.9%	Q4 2022
ULTAUlta Beauty, Inc.	$26.5M	0.88%	0.12%	+1.4%	Q3 2013
ADIAnalog Devices Inc	$24.8M	0.82%	0.02%	+27.4%	Q2 2024
BKRBaker Hughes Co	$23.6M	0.78%	0.04%	+629.5%	Q3 2021
BKNGBooking Holdings Inc.	$20.6M	0.68%	0.02%	-10.5%	Q2 2025
SNOWSnowflake Inc.	$20.5M	0.68%	0.04%	-10.0%	Q2 2025
RRCRange Resources Corp	$18.5M	0.61%	0.17%	+454.6%	Q2 2013
AMDAdvanced Micro Devices Inc	$18.1M	0.60%	0.01%	-15.1%	Q1 2017
CFCF Industries Holdings, Inc.	$16.8M	0.55%	0.08%	Not reported	Q3 2013
DOCNDigitalOcean Holdings, Inc.	$15.6M	0.52%	0.17%	-1.5%	Q4 2021
ASNDAscendis Pharma A/S	$15.5M	0.51%	0.11%	+1.9%	Q2 2019
AEISAdvanced Energy Industries Inc	$15M	0.50%	0.12%	-5.1%	Q2 2025
JPMJPMorgan Chase & Co	$14.9M	0.49%	0.00%	+13.2%	Q2 2015
GHGuardant Health, Inc.	$14.8M	0.49%	0.12%	-2.9%	Q2 2019
TSLATesla, Inc.	$14.6M	0.48%	0.00%	+39.4%	Q2 2017
TJXTJX Companies Inc	$14.5M	0.48%	0.01%	Not reported	Q2 2013
WMTWalmart Inc.	$14.1M	0.47%	0.00%	Not reported	Q1 2025
TSMTaiwan Semiconductor Manufacturing Co Ltd	$13.9M	0.46%	0.00%	+13.6%	Q2 2016
NXTNextpower Inc.	$13.8M	0.46%	0.08%	+8.1%	Q1 2024
PRPermian Resources Corp	$13.5M	0.45%	0.08%	Not reported	Q3 2022
FCFSFirstCash Holdings, Inc.	$13.3M	0.44%	0.16%	+15.6%	Q4 2018
MCHPMicrochip Technology Inc	$13.2M	0.44%	0.04%	-60.3%	Q2 2013
VIAVViavi Solutions Inc.	$12.6M	0.42%	0.16%	+8.4%	Q2 2019
EQTEQT Corp	$12.3M	0.41%	0.03%	-5.8%	Q2 2013
UBERUber Technologies, Inc	$12.2M	0.40%	0.01%	-45.1%	Q1 2024
DYDycom Industries Inc	$11M	0.36%	0.11%	-14.8%	Q2 2015
XOMExxonMobil Holdings Corp	$10.9M	0.36%	0.00%	Not reported	Q2 2013
BTSGBrightSpring Health Services, Inc.	$10.5M	0.35%	0.13%	+55.9%	Q4 2025
HLIOHelios Technologies, Inc.	$10.4M	0.34%	0.48%	+9.3%	Q3 2025

Q4 2025Reported Feb 13, 2026267 positions
NVDANvidia Corp	$263M	7.71%	0.01%	+2.2%	Q1 2020
MSFTMicrosoft Corp	$179M	5.25%	0.01%	+2.2%	Q2 2013
GOOGLAlphabet Inc.	$119M	3.51%	0.00%	+2.1%	Q4 2015
AMZNAmazon Com Inc	$109M	3.20%	0.00%	+20.9%	Q2 2013
AAPLApple Inc.	$105M	3.09%	0.00%	+1.9%	Q2 2013
LLYELI LILLY & Co	$87.7M	2.57%	0.01%	+83.1%	Q3 2018
METAMeta Platforms, Inc.	$80.8M	2.37%	Not reported	-16.9%	Q3 2013
AVGOBroadcom Inc.	$71.3M	2.09%	0.00%	0.0%	Q2 2016
LRCXLam Research Corp	$63.8M	1.87%	0.03%	-26.0%	Q1 2018
SCHWSchwab Charles Corp	$62.2M	1.83%	0.04%	+1.8%	Q3 2013
VVisa Inc.	$59.8M	1.76%	0.01%	+2.0%	Q4 2014
MAMastercard Inc	$58.5M	1.72%	0.01%	+2.1%	Q2 2013
SHOPShopify Inc.	$55.6M	1.63%	0.09%	+2.1%	Q3 2016
ANETArista Networks, Inc.	$53.9M	1.58%	0.03%	+2.2%	Q3 2017
NOWServiceNow, Inc.	$41.4M	1.22%	0.03%	+2.1%	Q4 2014
SPTSSports Media Inc	$39.1M	1.15%	Not reported	Not reported	Q4 2024
BXBlackstone Inc.	$37.7M	1.11%	0.03%	+2.1%	Q3 2019
GILDGilead Sciences, Inc.	$34M	1.00%	0.02%	+96.6%	Q2 2013
SNOWSnowflake Inc.	$33.2M	0.97%	0.04%	+2.1%	Q2 2025
MCHPMicrochip Technology Inc	$32.8M	0.96%	0.10%	+9.1%	Q2 2013
GEVGE Vernova Inc.	$31.2M	0.92%	0.02%	+2.5%	Q3 2024
ULTAUlta Beauty, Inc.	$30.2M	0.89%	0.11%	Not reported	Q3 2013
BKNGBooking Holdings Inc.	$29.3M	0.86%	0.02%	+165.6%	Q2 2025
UBERUber Technologies, Inc	$25.3M	0.74%	0.01%	+20.2%	Q1 2024
PODDInsulet Corp	$23M	0.68%	0.12%	+60.3%	Q4 2013
AMDAdvanced Micro Devices Inc	$22.4M	0.66%	0.01%	Not reported	Q1 2017
VRTVertiv Holdings Co	$20.2M	0.59%	0.03%	+2.1%	Q4 2022
SPOTSpotify Technology S.A.	$19.4M	0.57%	0.02%	+2.2%	Q2 2025
GEGeneral Electric Co	$18.9M	0.56%	0.01%	+16.4%	Q1 2025
TPRTapestry, Inc.	$18.2M	0.53%	0.07%	Not reported	Q1 2018
DALDelta Air Lines, Inc.	$18.1M	0.53%	0.04%	+13.6%	Q4 2014
GHGuardant Health, Inc.	$16.9M	0.49%	0.13%	+3.1%	Q2 2019
ADIAnalog Devices Inc	$16.6M	0.49%	0.01%	+2.9%	Q2 2024
ODFLOld Dominion Freight Line, Inc.	$15M	0.44%	0.05%	Not reported	Q1 2016
JPMJPMorgan Chase & Co	$14.4M	0.42%	0.00%	-16.4%	Q2 2015
ETNEaton Corp plc	$14.2M	0.42%	0.01%	+3.4%	Q2 2023
ASNDAscendis Pharma A/S	$14.1M	0.42%	0.11%	+55.5%	Q2 2019
MSMorgan Stanley	$14.1M	0.41%	0.01%	-11.9%	Q2 2015
TJXTJX Companies Inc	$13.9M	0.41%	0.01%	+17.8%	Q2 2013
CCitigroup Inc	$13.7M	0.40%	0.01%	+50.7%	Q2 2013
DYDycom Industries Inc	$12.9M	0.38%	0.13%	+27.1%	Q2 2015
TSLATesla, Inc.	$12.6M	0.37%	0.00%	+903.6%	Q2 2017
WMTWalmart Inc.	$12.6M	0.37%	0.00%	-19.8%	Q1 2025
LGNDLigand Pharmaceuticals Inc	$12.6M	0.37%	0.34%	+3.2%	Q2 2013
SFStifel Financial Corp	$12.3M	0.36%	0.09%	+12.4%	Q4 2016
SITMSITIME Corp	$11.9M	0.35%	0.13%	+3.0%	Q2 2022
KTOSKratos Defense & Security Solutions, Inc.	$11.6M	0.34%	0.09%	-15.5%	Q2 2017
LITELumentum Holdings Inc.	$11.5M	0.34%	0.04%	-52.7%	Q1 2016
EQTEQT Corp	$11M	0.32%	0.03%	+46.5%	Q2 2013
TSMTaiwan Semiconductor Manufacturing Co Ltd	$11M	0.32%	0.00%	-34.7%	Q2 2016

Q3 2025Reported Nov 17, 2025264 positions
NVDANvidia Corp	$257M	7.21%	0.01%	-2.9%	Q1 2020
MSFTMicrosoft Corp	$187M	5.25%	0.00%	-2.8%	Q2 2013
METAMeta Platforms, Inc.	$108M	3.03%	Not reported	-3.5%	Q3 2013
AAPLApple Inc.	$96.8M	2.71%	0.00%	-3.4%	Q2 2013
GOOGLAlphabet Inc.	$90.9M	2.55%	0.00%	-3.5%	Q4 2015
AMZNAmazon Com Inc	$85.8M	2.40%	0.00%	-34.8%	Q2 2013
AVGOBroadcom Inc.	$67.9M	1.90%	0.00%	Not reported	Q2 2016
LRCXLam Research Corp	$67.5M	1.89%	0.04%	-3.6%	Q1 2018
NFLXNetflix Inc	$65.9M	1.85%	0.01%	-14.2%	Q2 2013
ANETArista Networks, Inc.	$58.6M	1.64%	0.03%	-51.1%	Q3 2017
SCHWSchwab Charles Corp	$58.4M	1.64%	0.03%	+78.7%	Q3 2013
MAMastercard Inc	$57.1M	1.60%	0.01%	-23.4%	Q2 2013
VVisa Inc.	$57M	1.60%	0.01%	-23.0%	Q4 2014
SHOPShopify Inc.	$50.3M	1.41%	0.09%	+15.1%	Q3 2016
NOWServiceNow, Inc.	$48.8M	1.37%	0.03%	-16.4%	Q4 2014
BXBlackstone Inc.	$40.9M	1.15%	0.03%	+15.1%	Q3 2019
SPTSSports Media Inc	$39.1M	1.10%	Not reported	Not reported	Q4 2024
LLYELI LILLY & Co	$34M	0.95%	0.00%	-3.5%	Q3 2018
SNOWSnowflake Inc.	$33.4M	0.94%	0.04%	-3.5%	Q2 2025
MCHPMicrochip Technology Inc	$30.3M	0.85%	0.09%	+233.3%	Q2 2013
GEVGE Vernova Inc.	$28.6M	0.80%	0.02%	+854.4%	Q3 2024
UBERUber Technologies, Inc	$25.2M	0.71%	0.01%	+179.4%	Q1 2024
SPOTSpotify Technology S.A.	$22.9M	0.64%	0.02%	-3.5%	Q2 2025
DXCMDexcom Inc	$20.2M	0.57%	0.08%	-3.6%	Q2 2013
VRTVertiv Holdings Co	$18.4M	0.52%	0.03%	Not reported	Q4 2022
JPMJPMorgan Chase & Co	$16.8M	0.47%	0.00%	+58.3%	Q2 2015
KTOSKratos Defense & Security Solutions, Inc.	$16.5M	0.46%	0.11%	+3.9%	Q2 2017
ETNEaton Corp plc	$16.1M	0.45%	0.01%	+16458.5%	Q2 2023
GEGeneral Electric Co	$15.9M	0.44%	0.01%	+84.2%	Q1 2025
GILDGilead Sciences, Inc.	$15.7M	0.44%	0.01%	+2545.0%	Q2 2013
PODDInsulet Corp	$15.6M	0.44%	0.07%	+5.9%	Q4 2013
TSMTaiwan Semiconductor Manufacturing Co Ltd	$15.5M	0.44%	0.00%	Not reported	Q2 2016
HDHome Depot, Inc.	$15.1M	0.42%	0.00%	+1520.4%	Q2 2013
ADIAnalog Devices Inc	$14.6M	0.41%	0.01%	Not reported	Q2 2024
WMTWalmart Inc.	$14.6M	0.41%	0.00%	+65.2%	Q1 2025
CEGConstellation Energy Corp	$14.5M	0.41%	0.01%	+93.6%	Q3 2024
LNGCheniere Energy, Inc.	$14.4M	0.40%	0.03%	-3.4%	Q2 2013
ORCLOracle Corp	$14.4M	0.40%	0.00%	Not reported	Q2 2013
MSMorgan Stanley	$14.3M	0.40%	0.01%	+18.0%	Q2 2015
BEBloom Energy Corp	$14.3M	0.40%	0.07%	+2179.3%	Q4 2024
AVAVAeroVironment Inc	$13.3M	0.37%	0.08%	+42.7%	Q3 2023
DALDelta Air Lines, Inc.	$13M	0.37%	0.04%	Not reported	Q4 2014
RMBSRambus Inc	$11.5M	0.32%	0.10%	-3.4%	Q3 2013
LGNDLigand Pharmaceuticals Inc	$11.5M	0.32%	0.33%	Not reported	Q2 2013
STRLSterling Infrastructure, Inc.	$11.2M	0.31%	0.11%	+14.5%	Q1 2021
BKNGBooking Holdings Inc.	$11.1M	0.31%	0.01%	+89.0%	Q2 2025
TJXTJX Companies Inc	$11.1M	0.31%	0.01%	-12.2%	Q2 2013
LIFLife360, Inc.	$10.7M	0.30%	0.13%	+19.2%	Q2 2025
LITELumentum Holdings Inc.	$10.7M	0.30%	0.09%	+3.9%	Q1 2016
RACEFerrari N.V.	$10.7M	0.30%	0.01%	+2.1%	Q4 2016

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