Latest CASTLEARK MANAGEMENT LLC Stock Portfolio

CASTLEARK MANAGEMENT LLC Performance:

2025 Q4: 2.28%YTD: 15.97%2024: 26.36%

Performance for 2025 Q4 is 2.28%, and YTD is 15.97%, and 2024 is 26.36%.

About CASTLEARK MANAGEMENT LLC and 13F Hedge Fund Stock Holdings

CASTLEARK MANAGEMENT LLC is a hedge fund based in Chicago, IL. On 2026-02-13, the fund reported it's updated stock portfolio. In the 13F Holdings report, CASTLEARK MANAGEMENT LLC reported an equity portfolio of $3.4 Billions as of 31 Dec, 2025.

The top stock holdings of CASTLEARK MANAGEMENT LLC are NVDA, MSFT, GOOG. The fund has invested 7.7% of it's portfolio in NVIDIA CORPORATION and 5.2% of portfolio in MICROSOFT CORP.

The fund managers got completely rid off ADVISORS INNER CIRCLE FD II, NETFLIX INC (NFLX) and DEXCOM INC (DXCM) stocks. They significantly reduced their stock positions in FASTENAL CO (FAST), GENIUS SPORTS LIMITED (GENI) and VISTRA CORP (VST). CASTLEARK MANAGEMENT LLC opened new stock positions in ULTA BEAUTY INC (ULTA), ADVANCED MICRO DEVICES INC (AMD) and TAPESTRY INC (TPR). The fund showed a lot of confidence in some stocks as they added substantially to BOEING CO (BA), TESLA INC (TSLA) and ISHARES TR (IJR).

CASTLEARK MANAGEMENT LLC Annual Return Estimates Vs S&P 500

Our best estimate is that CASTLEARK MANAGEMENT LLC made a return of 2.28% in the last quarter. In trailing 12 months, it's portfolio return was 15.97%.

Performance
S&P 500

New Buys

Ticker	$ Bought
ulta beauty inc	30,214,800
advanced micro devices inc	22,432,400
tapestry inc	18,154,100
old dominion freight line in	15,010,500
firstcash holdings inc	9,754,060
arcutis biotherapeutics inc	8,985,850
garrett motion inc	8,965,990
digitalocean hldgs inc	8,901,670

New stocks bought by CASTLEARK MANAGEMENT LLC

Additions

Ticker	% Inc.
boeing co	1,334
tesla inc	903
ishares tr	244
nrg energy inc	186
booking holdings inc	165
enbridge inc	160
xpo inc	155
mastec inc	139

Additions to existing portfolio by CASTLEARK MANAGEMENT LLC

Reductions

Ticker	% Reduced
fastenal co	-94.67
genius sports limited	-83.08
vistra corp	-76.37
aerovironment inc	-75.7
arlo technologies inc	-72.44
constellation energy corp	-66.36
home depot inc	-65.5
bloom energy corp	-58.84

CASTLEARK MANAGEMENT LLC reduced stake in above stock

Sold off

Ticker	$ Sold
advisors inner circle fd ii	-322,061,000
plug power inc	-1,696,500
netflix inc	-65,878,300
banco santander s.a.	-4,249,800
porch group inc	-6,389,170
dexcom inc	-20,203,800
rush street interactive inc	-5,775,070
sportradar group ag	-7,369,580

CASTLEARK MANAGEMENT LLC got rid off the above stocks

Sector Distribution

CASTLEARK MANAGEMENT LLC has about 31.4% of it's holdings in Technology sector.

Sector	%
Technology	31.4
Others	16.7
Financial Services	10.1
Consumer Cyclical	9.9
Industrials	9.8
Healthcare	8.2
Communication Services	6.2
Energy	3
Utilities	2.5
Consumer Defensive	1.1

Market Cap. Distribution

CASTLEARK MANAGEMENT LLC has about 67.9% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
MEGA-CAP	38.9
LARGE-CAP	29
UNALLOCATED	16.7
MID-CAP	13.9
SMALL-CAP	1.4

Stocks belong to which Index?

About 72.3% of the stocks held by CASTLEARK MANAGEMENT LLC either belong to S&P 500 or RUSSELL 2000 index.

Index	%
S&P 500	55.8
Others	27.7
RUSSELL 2000	16.5

Top 5 Winners (%)		%
LITE	lumentum hldgs inc	93.2 %
GH	guardant health inc	61.9 %
BBIO	bridgebio pharma inc	45.4 %
JBHT	hunt j b trans svcs inc	44.9 %
PL	planet labs pbc	43.9 %

Top 5 Winners ($)		$
GOOG	alphabet inc	26.4 M
LLY	eli lilly & co	19.7 M
LRCX	lam research corp	16.3 M
LITE	lumentum hldgs inc	10.0 M
AAPL	apple inc	6.6 M

Top 5 Losers (%)		%
	fiserv inc	-47.9 %
COIN	coinbase global inc	-32.2 %
RACE	ferrari n v	-23.7 %
NEXT	nextdecade corp	-22.4 %
FFIV	f5 inc	-21.0 %

Top 5 Losers ($)		$
MSFT	microsoft corp	-12.5 M
META	meta platforms inc	-10.0 M
NOW	servicenow inc	-8.3 M
ANET	arista networks inc	-6.0 M
UBER	uber technologies inc	-4.6 M

CASTLEARK MANAGEMENT LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of CASTLEARK MANAGEMENT LLC

CASTLEARK MANAGEMENT LLC has 294 stocks in it's portfolio. About 34.8% of the portfolio is in top 10 stocks. MSFT proved to be the most loss making stock for the portfolio. GOOG was the most profitable stock for CASTLEARK MANAGEMENT LLC last quarter.

Last Reported on: 13 Feb, 2026

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
AAOI	applied optoelectronics inc	0.00	0.00	0.00	sold off	-100

AAP	advance auto parts inc	0.00	0.00	0.00	sold off	-100

AAPL	apple inc	3.09	387,041	105,221,000	added	1.85

AAXJ	ishares tr	0.77	258,432	26,274,800	unchanged	0.00

AAXJ	ishares tr	0.57	204,235	19,447,300	added	3.72

AAXJ	ishares tr	0.41	259,994	14,008,500	unchanged	0.00

AAXJ	ishares tr	0.00	0.00	0.00	sold off	-100

ACA	arcosa inc	0.15	48,500	5,156,520	new

ACWV	ishares inc	0.01	3,670	197,923	new

ACWV	ishares inc	0.00	3,770	98,736	new

ACWV	ishares inc	0.00	1,010	98,192	new

ADI	analog devices inc	0.49	61,172	16,589,800	added	2.85

ADPT	adaptive biotechnologies cor	0.19	390,874	6,347,790	added	31.13

AEIS	advanced energy inds	0.30	49,133	10,287,000	added	2.98

AGCO	agco corp	0.00	0.00	0.00	sold off	-100

AIR	aar corp	0.21	86,854	7,190,640	added	3.16

ALGM	allegro microsystems inc	0.00	0.00	0.00	sold off	-100

ALK	alaska air group inc	0.00	0.00	0.00	sold off	-100

AM	antero midstream corp	0.03	52,160	927,926	unchanged	0.00

AMD	advanced micro devices inc	0.66	104,746	22,432,400	new