Q2 2026 13F · SEC CIK 1106832

Castleark Management LLC

Institutional asset managerFiled 2026-08-14 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $3.7B
Reported positions: 309
Top holdings a year, 3 yrs: +19.9%
Assets under management: $4.6B

Castleark Management LLC is an institutional asset manager that reported 309 positions worth $3.7B in its Q2 2026 13F, filed 2026-08-14. Its largest holdings were Nvidia Corporation Com (NVDA, 7.0%), Alphabet Inc (GOOGL, 4.9%), Apple Inc (AAPL, 3.7%). A portfolio copying its top holdings returned 19.9% a year over the last 3 years, against 20.4% for the S&P 500.

Castleark Management LLC holdings largest 50 of 309 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Castleark Management LLC 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
NVDANvidia Corporation Com	7.0%	7.3%	1,299,605	+3.3%	$260.0M
GOOGLAlphabet Inc	4.9%	4.0%	507,093	+21.3%	$181.2M
AAPLApple Inc	3.7%	2.9%	472,108	+34.9%	$136.6M
LRCXLam Research Corp	3.3%	2.4%	283,808	-15.7%	$123.0M
MSFTMicrosoft Corp	2.9%	3.2%	292,770	+10.9%	$109.2M
LLYLilly Eli & Co	2.8%	2.2%	87,697	+19.4%	$105.2M
AVGOBroadcom Inc	2.5%	2.1%	243,896	+20.3%	$92.1M
SPIBSpdr Series Trust	2.4%	3.0%	2,688,380	+0.0%	$90.0M
VVisa Inc Com Cl A	2.2%	1.5%	236,166	+53.5%	$81.0M
ANETArista Networks Inc	2.2%	1.8%	473,319	+9.8%	$80.4M
GOVTIshares Tr	2.0%	2.5%	3,329,569	+0.0%	$75.8M
VMBSVmbs	1.9%	2.3%	1,487,800	+0.0%	$69.6M
AMDAdvanced Micro Devices Inc	1.9%	0.6%	118,865	+33.6%	$69.0M
GILDGilead Sciences	1.8%	1.6%	527,542	+54.2%	$66.6M
AMZNAmazon Com Inc Com	1.7%	1.7%	268,249	+9.1%	$63.9M
GEVGe Vernova Inc	1.5%	1.2%	46,101	+11.1%	$54.2M
METAMeta Platforms Inc Class A	1.4%	2.3%	93,744	-24.4%	$52.8M
ADIAnalog Devices Inc	1.3%	0.8%	120,934	+55.2%	$48.0M
MAMastercard Inc.	1.3%	1.5%	91,462	-0.6%	$47.0M
MSMorgan Stanley Com New	1.2%	—	208,542	—	$43.6M
SNOWSnowflake Inc	1.1%	0.7%	166,818	+22.6%	$42.5M
VRTVertiv Holdings Co	1.1%	0.9%	123,901	+10.3%	$41.5M
TPRTapestry Inc	1.0%	1.0%	265,749	+30.0%	$38.9M
SPTSSpdr Series Trust	1.0%	1.3%	1,334,080	+0.0%	$38.7M
VCLTVanguard Scottsdale Fds	0.9%	1.1%	448,330	+0.0%	$33.7M
NOWServicenow Inc Com	0.9%	1.1%	321,623	+5.9%	$31.9M
TLHIshares Tr	0.7%	0.9%	258,432	+0.0%	$25.9M
BKNGBooking Holdings Inc Com	0.7%	0.7%	136,776	+2693.6%	$24.4M
MCOMoodys Corp	0.7%	—	53,444	—	$24.2M
TSLATesla Inc Com	0.5%	0.5%	48,070	+22.7%	$20.2M
CATCaterpillar Inc Com	0.5%	—	18,980	—	$20.2M
GEGe Aerospace	0.5%	—	52,830	—	$19.7M
TSMTaiwan Semiconductor Manufac	0.5%	0.5%	41,210	+0.0%	$19.7M
LGNDLigand Pharmaceuticals Inc	0.5%	—	62,043	—	$19.6M
SNSharkninja Inc Com Shs	0.5%	—	127,170	—	$19.4M
MBBIshares Tr	0.5%	0.6%	204,235	+0.0%	$19.3M
TWLOTwilio Inc Cl A	0.5%	—	92,390	—	$19.1M
BKRBaker Hughes Company Cl A	0.5%	0.8%	330,020	-14.8%	$18.3M
GTXGarrett Motion Inc	0.5%	—	469,470	—	$17.0M
JPMJpmorgan Chase & Co	0.4%	0.5%	50,525	+0.0%	$16.5M
ASNDAscendis Pharma As Ord	0.4%	—	61,696	—	$16.5M
JBHTHunt J B Trans Svcs Inc	0.4%	—	56,520	—	$16.4M
FANGDiamondback Energy Inc	0.4%	0.9%	90,680	-37.5%	$15.9M
GMGeneral Mtrs Co	0.4%	—	199,440	—	$15.4M
BTSGBrightspring Health Svcs Inc	0.4%	—	212,430	—	$14.8M
SMTCSemtech Corp	0.4%	—	91,218	—	$14.8M
FCFSFirstcash Holdings Inc	0.4%	0.4%	68,190	-3.6%	$14.8M
MARMarriott Intl Inc New Cl A	0.4%	—	37,910	—	$14.0M
IGIBIshares Tr	0.4%	0.5%	259,994	+0.0%	$13.8M
TJXTjx Cos Inc New Com	0.4%	0.5%	90,620	+0.0%	$13.7M

What Castleark Management LLC bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Added to

BKNG Booking Holdings Inc Com+2693.6% shares
ADI Analog Devices Inc+55.2% shares
GILD Gilead Sciences+54.2% shares
V Visa Inc Com Cl A+53.5% shares
AAPL Apple Inc+34.9% shares
AMD Advanced Micro Devices Inc+33.6% shares
TPR Tapestry Inc+30.0% shares
TSLA Tesla Inc Com+22.7% shares

Reduced

FANG Diamondback Energy Inc-37.5% shares
META Meta Platforms Inc Class A-24.4% shares
LRCX Lam Research Corp-15.7% shares
BKR Baker Hughes Company Cl A-14.8% shares

Left the top 50

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +14.7% /yr; S&P 500 +20.1%
3 years: +19.9% /yr; S&P 500 +20.4%
5 years: +10.9% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$3.7B	309
Q1 2026	$3.0B	292
Q4 2025	$3.4B	294
Q3 2025	$3.6B	284
Q2 2025	$3.3B	275
Q1 2025	$2.9B	280
Q4 2024	$2.9B	283
Q3 2024	$2.5B	272
Q2 2024	$2.4B	271
Q1 2024	$2.4B	278
Q4 2023	$2.3B	281
Q3 2023	$2.0B	274

Questions about Castleark Management LLC's portfolio

What stocks does Castleark Management LLC own?

Castleark Management LLC's latest 13F, for Q2 2026 and filed Aug 14, 2026, lists 309 positions worth $3.7B. The largest are Nvidia Corporation Com (NVDA) at 7.0%, Alphabet Inc (GOOGL) at 4.9%, Apple Inc (AAPL) at 3.7%, Lam Research Corp (LRCX) at 3.3% and Microsoft Corp (MSFT) at 2.9%.

What did Castleark Management LLC buy last quarter?

In Q2 2026, Castleark Management LLC added Booking Holdings Inc Com (BKNG) (+2693.6% shares), Analog Devices Inc (ADI) (+55.2% shares) and Gilead Sciences (GILD) (+54.2% shares), compared with its Q1 2026 filing.

What did Castleark Management LLC sell last quarter?

In Q2 2026, Castleark Management LLC cut from its top 50 Schwab Charles Corp (SCHW), cut from its top 50 Shopify Inc (SHOP), cut from its top 50 Chevron Corp New (CVX), cut from its top 50 Ulta Beauty Inc (ULTA), cut from its top 50 Range Res Corp (RRC), Diamondback Energy Inc (FANG) (-37.5% shares), Meta Platforms Inc Class A (META) (-24.4% shares) and Lam Research Corp (LRCX) (-15.7% shares), compared with its Q1 2026 filing.

How has Castleark Management LLC's portfolio performed?

A portfolio copying Castleark Management LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned +19.9% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +14.7% against +20.1%. Over 5 years: +10.9% a year against +11.6%.

When is Castleark Management LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. Castleark Management LLC's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does Castleark Management LLC manage?

Castleark Management LLC reported $4.6B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $3.7B.