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Latest CASTLEARK MANAGEMENT LLC Stock Portfolio

$3.02Billion– No. of Holdings #292

CASTLEARK MANAGEMENT LLC Performance:
2026 Q1: -1.77%YTD: -1.77%2025: 15.97%
Performance for 2026 Q1 is -1.77%, and YTD is -1.77%, and 2025 is 15.97%.

About CASTLEARK MANAGEMENT LLC and 13F Hedge Fund Stock Holdings

CASTLEARK MANAGEMENT LLC is a hedge fund based in Chicago, IL. On 2026-05-15, the fund reported it's updated stock portfolio. In the 13F Holdings report, CASTLEARK MANAGEMENT LLC reported an equity portfolio of $3 Billions as of 31 Mar, 2026.

The top stock holdings of CASTLEARK MANAGEMENT LLC are NVDA, GOOG, MSFT. The fund has invested 7.3% of it's portfolio in NVIDIA CORPORATION and 4% of portfolio in ALPHABET INC.

The fund managers got completely rid off BLACKSTONE INC (BX), ISHARES TR (IJR) and INSULET CORP (PODD) stocks. They significantly reduced their stock positions in EATON CORP PLC (ETN), LUMENTUM HLDGS INC (LITE) and ROCKET COS INC (RKT). CASTLEARK MANAGEMENT LLC opened new stock positions in DIAMONDBACK ENERGY INC (FANG), CHEVRON CORPORATION (CVX) and CF INDUSTRIES HOLD (CF). The fund showed a lot of confidence in some stocks as they added substantially to FASTENAL CO (FAST), ELANCO ANIMAL HEALTH INC (ELAN) and BAKER HUGHES COMPANY (BKR).
CASTLEARK MANAGEMENT LLC Equity Portfolio Value
Last Reported on: 15 May, 2026

CASTLEARK MANAGEMENT LLC Annual Return Estimates Vs S&P 500

Our best estimate is that CASTLEARK MANAGEMENT LLC made a return of -1.77% in the last quarter. In trailing 12 months, it's portfolio return was 20.23%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
diamondback energy inc28,683,500
chevron corporation28,252,200
cf industries hold16,768,800
permian resources corp13,452,500
exxon mobil corp10,936,300
tower semiconductor ltd9,342,560
jazz pharmaceuticals plc9,214,300
solstice advanced matls inc8,609,890
New stocks bought by CASTLEARK MANAGEMENT LLC

Additions

Ticker% Inc.
fastenal co2,048
elanco animal health inc931
baker hughes company629
range res corp454
alphabet inc323
hunt j b trans svcs inc299
modine mfg co216
vita coco co inc166
Additions to existing portfolio by CASTLEARK MANAGEMENT LLC

Reductions

Ticker% Reduced
eaton corp plc-98.67
lumentum hldgs inc-97.53
rocket cos inc-92.74
quanta svcs inc-79.34
mercury sys inc-78.85
ferrari n v-76.33
talen energy corp-76.21
emcor group inc-73.55
CASTLEARK MANAGEMENT LLC reduced stake in above stock

Sold off

Ticker$ Sold
xeris biopharma holdings inc-3,500,710
adaptive biotechnologies cor-6,347,790
thredup inc-2,385,450
gates indl corp plc-7,684,800
mirion technologies inc-8,153,200
ishares tr-33,378,100
alphatec hldgs inc-6,231,210
delta air lines inc del-18,095,400
CASTLEARK MANAGEMENT LLC got rid off the above stocks

Sector Distribution

CASTLEARK MANAGEMENT LLC has about 29.1% of it's holdings in Technology sector.

  • Technology
  • Others
  • Consumer Cyclical
  • Industrials
  • Healthcare
  • Energy
  • Financial Services
  • Communication Services
  • Utilities
  • Consumer Defensive
  • Basic Materials
Sector%
Technology29.1
Others17.8
Consumer Cyclical9.4
Industrials8.4
Healthcare8.1
Energy7.9
Financial Services7.3
Communication Services6.9
Utilities2.6
Consumer Defensive1.2
Basic Materials1.2

Market Cap. Distribution

CASTLEARK MANAGEMENT LLC has about 65.3% of it's portfolio invested in the large-cap and mega-cap stocks.

  • MEGA-CAP
  • LARGE-CAP
  • UNALLOCATED
  • MID-CAP
Category%
MEGA-CAP36.2
LARGE-CAP29.1
UNALLOCATED17.8
MID-CAP16.2

Stocks belong to which Index?

About 70.6% of the stocks held by CASTLEARK MANAGEMENT LLC either belong to S&P 500 or RUSSELL 2000 index.

  • S&P 500
  • Others
  • RUSSELL 2000
Index%
S&P 50053.9
Others29.4
RUSSELL 200016.7
Top 5 Winners (%)%
VIAV
viavi solutions inc
80.7 %
DOCN
digitalocean hldgs inc
77.7 %
AEIS
advanced energy inds
52.8 %
RIG
transocean ltd
52.5 %
POWL
powell inds inc
52.1 %
Top 5 Winners ($)$
LRCX
lam research corp
15.1 M
VRT
vertiv holdings co
10.5 M
ge vernova inc
9.8 M
DOCN
digitalocean hldgs inc
6.9 M
VIAV
viavi solutions inc
5.6 M
Top 5 Losers (%)%
SF
stifel finl corp
-40.5 %
HOOD
robinhood mkts inc
-38.7 %
NOW
servicenow inc
-30.5 %
SNOW
snowflake inc
-29.7 %
IRTC
irhythm holdings inc
-25.8 %
Top 5 Losers ($)$
MSFT
microsoft corp
-35.9 M
NVDA
nvidia corporation
-16.1 M
NOW
servicenow inc
-14.0 M
SHOP
shopify inc
-13.9 M
LLY
eli lilly & co
-12.0 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 292 stocks in it's portfolio. About 32.2% of the portfolio is in top 10 stocks. MSFT proved to be the most loss making stock for the portfolio. LRCX was the most profitable stock for CASTLEARK MANAGEMENT LLC last quarter.

Last Reported on: 15 May, 2026
TickerNamesorted ascending% PortfolioShares Held$ ValueType% ChangeOptions