Castleark Management Portfolio holdings
CastleArk Management is an employee-owned manager of growth stock strategies, founded in 1999. It mainly buys U.S. stocks and, to a lesser extent, those of other countries, and its process aims to exploit behavioral biases found in growth stocks. Co-founder Jerome Castellini controls it and a sister firm, CastleArk Alternatives, which has existed since 2005 and sponsors private funds. Its clients are mainly investment funds and institutions, many of them retirement plans.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Morgan Stanley
MS
|
+$36.6M |
| 2 |
Apple
AAPL
|
+$34.9M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$32.1M |
| 4 |
Visa
V
|
+$26.4M |
| 5 |
Gilead Sciences
GILD
|
+$24.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Charles Schwab
SCHW
|
+$45.1M |
| 2 |
Ulta Beauty
ULTA
|
+$26.5M |
| 3 |
Shopify
SHOP
|
+$25.5M |
| 4 |
Chevron
CVX
|
+$23.2M |
| 5 |
DigitalOcean
DOCN
|
+$19.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 34.63% |
| 2 | Industrials | 12.24% |
| 3 | Miscellaneous | 11.82% |
| 4 | Healthcare | 10.33% |
| 5 | Consumer Discretionary | 9.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
126
Allison Transmission
ALSN
$10.7B
| $7.32M | 0.2% |
64,910
+14,280
| +28% | +$1.73M |
2026 Q1
1 quarter
|
|
127
Paymentus
PAY
$4.29B
| $7.21M | 0.19% |
298,540
+27,770
| +10% | +$681K |
2026 Q1
1 quarter
|
|
128
Murphy USA
MUSA
$9.6B
| $7.16M | 0.19% |
13,280
+2,510
| +23% | +$1.36M |
2026 Q1
1 quarter
|
|
129
Plexus
PLXS
$5.65B
| $7.14M | 0.19% |
23,750
-930
| -4% | -$243K |
2026 Q1
1 quarter
|
|
130
Texas Roadhouse
TXRH
$12.4B
| $7.05M | 0.19% |
36,490
-4,920
| -12% | -$838K |
2025 Q4
2 quarters
|
|
131
Herc Holdings
HRI
$5.82B
| $6.95M | 0.19% |
+48,490
| New | +$6.25M |
2026 Q2
0 quarters
|
|
132
MSC Industrial Direct
MSM
$6.75B
| $6.93M | 0.19% |
+58,250
| New | +$6.19M |
2026 Q2
0 quarters
|
|
133
Stifel
SF
$10.9B
| $6.85M | 0.18% |
98,210
-3,800
| -4% | -$283K |
2024 Q1
9 quarters
|
|
134
CAVA Group
CAVA
$6.99B
| $6.78M | 0.18% |
+86,440
| New | +$7.25M |
2026 Q2
0 quarters
|
|
135
Quest Diagnostics
DGX
$28.6B
| $6.67M | 0.18% |
+31,480
| New | +$6.18M |
2026 Q2
0 quarters
|
|
136
APi Group
APG
$18.7B
| $6.47M | 0.17% |
152,813
-47,450
| -24% | -$2.07M |
2022 Q4
14 quarters
|
|
137
Cheniere Energy
LNG
$62.2B
| $6.34M | 0.17% |
26,526
+2,430
| +10% | +$605K |
2013 Q2
52 quarters
|
|
138
Regal Rexnord
RRX
$12.2B
| $6.27M | 0.17% |
26,330
+6,940
| +36% | +$1.45M |
2026 Q1
1 quarter
|
|
139
QXO Inc
QXO
$14.3B
| $6.26M | 0.17% |
362,257
-13,550
| -4% | -$252K |
2025 Q2
4 quarters
|
|
140
Protagonist Therapeutics
PTGX
$8.8B
| $6.2M | 0.17% |
+50,570
| New | +$5.28M |
2026 Q2
0 quarters
|
|
141
Aaon
AAON
$6.29B
| $6.18M | 0.17% |
+48,720
| New | +$5.7M |
2026 Q2
0 quarters
|
|
142
Centuri Holdings
CTRI
$2.29B
| $6.16M | 0.17% |
+203,830
| New | +$6.58M |
2026 Q2
0 quarters
|
|
143
James Hardie Industries
JHX
$16.5B
| $6.12M | 0.17% |
+233,750
| New | +$5.14M |
2026 Q2
0 quarters
|
|
144
Wyndham Hotels & Resorts
WH
$5.99B
| $6.1M | 0.16% |
72,400
-2,800
| -4% | -$232K |
2026 Q1
1 quarter
|
|
145
Advanced Energy
AEIS
$9.38B
| $6.04M | 0.16% |
16,193
-30,430
| -65% | -$10.6M |
2025 Q2
4 quarters
|
|
146
Krystal Biotech
KRYS
$9.15B
| $6M | 0.16% |
16,150
-15,480
| -49% | -$4.63M |
2025 Q4
2 quarters
|
|
147
BridgeBio Pharma
BBIO
$15.5B
| $5.85M | 0.16% |
78,497
-3,240
| -4% | -$227K |
2025 Q1
5 quarters
|
|
148
iShares Russell 1000 Value ETF
IWD
$85.1B
| $5.83M | 0.16% |
24,040
| – | – |
2025 Q4
2 quarters
|
|
149
Terex
TEX
$6.48B
| $5.78M | 0.16% |
79,900
+4,610
| +6% | +$288K |
2026 Q1
1 quarter
|
|
150
iShares MSCI Australia ETF
EWA
$1.25B
| $5.77M | 0.16% |
205,060
+201,290
| +5,339% | +$5.84M |
2025 Q4
2 quarters
|
|
Similar funds
Castleark Management's Q2 2026 Portfolio in Review
As of Q2 2026, Castleark Management held 350 positions worth $3.71B, up 23% from $3.02B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Castleark Management's Q2 2026 filing shows 58 new, 69 increased, 89 reduced and 41 closed positions. Its largest new stake was SharkNinja: 127,170 shares worth $19.4M. The largest sale was Charles Schwab, an estimated $45.1M.
By sector, the portfolio is most concentrated in Technology at 35% of assets, up from 32% a quarter earlier, followed by Industrials and Miscellaneous.
- Castleark Management's largest Q2 2026 buy was SharkNinja: 127,170 shares worth $19.4M.
- Castleark Management added most to Morgan Stanley in Q2 2026, an estimated $36.6M increase.
- Castleark Management's biggest Q2 2026 reduction was Charles Schwab, cutting an estimated $45.1M.
- Castleark Management fully exited Ulta Beauty in Q2 2026, selling an estimated $26.5M.
- Castleark Management's ten largest holdings make up 34% of its $3.71B portfolio in Q2 2026.
- Castleark Management opened 58 new positions and closed 41 in Q2 2026.
- Castleark Management's portfolio value rose 23% quarter-over-quarter to $3.71B.
Based on Castleark Management's 13F filing for Q2 2026, filed 14 Aug 2026.