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 | |
|---|---|---|---|---|---|---|---|
101
Micron Technology
MU
$826B
| $9.11M | 0.25% |
7,890
-3,090
| -28% | -$2.32M |
2026 Q1
1 quarter
|
|
102
W.W. Grainger
GWW
$68.2B
| $8.99M | 0.24% |
6,610
+1,000
| +18% | +$1.23M |
2026 Q1
1 quarter
|
|
103
Openlane
OPLN
$4.25B
| $8.96M | 0.24% |
+217,210
| New | +$7.59M |
2026 Q2
0 quarters
|
|
104
State Street Health Care Select Sector SPDR ETF
XLV
$50.2B
| $8.91M | 0.24% |
56,130
| – | – |
2025 Q4
2 quarters
|
|
105
Transocean
RIG
$5.89B
| $8.87M | 0.24% |
1,813,160
+976,040
| +117% | +$6.1M |
2025 Q4
2 quarters
|
|
106
Elanco Animal Health
ELAN
$13.1B
| $8.83M | 0.24% |
358,880
+2,930
| +0.8% | +$67.7K |
2025 Q4
2 quarters
|
|
107
TeraWulf
WULF
$5.97B
| $8.72M | 0.24% |
+353,080
| New | +$8.12M |
2026 Q2
0 quarters
|
|
108
Enova International
ENVA
$4.22B
| $8.68M | 0.23% |
36,070
-1,400
| -4% | -$241K |
2026 Q1
1 quarter
|
|
109
Intel
INTC
$310B
| $8.6M | 0.23% |
+61,560
| New | +$6.23M |
2026 Q2
0 quarters
|
|
110
Rush Enterprises Class A
RUSHA
$5.23B
| $8.32M | 0.22% |
+170,925
| New | +$8.04M |
2026 Q2
0 quarters
|
|
111
TG Therapeutics
TGTX
$8.67B
| $8.3M | 0.22% |
+150,990
| New | +$6.18M |
2026 Q2
0 quarters
|
|
112
Fastenal
FAST
$62B
| $8.23M | 0.22% |
171,420
+22,730
| +15% | +$1.03M |
2013 Q2
52 quarters
|
|
113
Charles River Laboratories
CRL
$16.8B
| $8.17M | 0.22% |
36,045
-3,390
| -9% | -$604K |
2025 Q3
3 quarters
|
|
114
Praxis Precision Medicines
PRAX
$8.42B
| $8.17M | 0.22% |
+24,390
| New | +$7.72M |
2026 Q2
0 quarters
|
|
115
F5
FFIV
$18.1B
| $8.13M | 0.22% |
19,550
+19,410
| +13,864% | +$6.9M |
2013 Q2
52 quarters
|
|
116
Lincoln Educational Services
LINC
$698M
| $8.13M | 0.22% |
162,910
+12,300
| +8% | +$557K |
2026 Q1
1 quarter
|
|
117
Bruker
BRKR
$9.8B
| $8.08M | 0.22% |
+134,270
| New | +$6.27M |
2026 Q2
0 quarters
|
|
118
CF Industries
CF
$17.5B
| $7.97M | 0.21% |
73,610
-55,540
| -43% | -$6.55M |
2026 Q1
1 quarter
|
|
119
Liberty Energy
LBRT
$2.06B
| $7.77M | 0.21% |
296,629
+31,840
| +12% | +$952K |
2026 Q1
1 quarter
|
|
120
Molina Healthcare
MOH
$10.9B
| $7.73M | 0.21% |
+33,790
| New | +$6.12M |
2026 Q2
0 quarters
|
|
121
Range Resources
RRC
$11.5B
| $7.63M | 0.21% |
205,260
-205,260
| -50% | -$8.34M |
2024 Q3
7 quarters
|
|
122
PENN Entertainment
PENN
$2.46B
| $7.52M | 0.2% |
+351,920
| New | +$6.31M |
2026 Q2
0 quarters
|
|
123
Modine Manufacturing
MOD
$5.59B
| $7.47M | 0.2% |
27,970
-9,880
| -26% | -$2.6M |
2025 Q4
2 quarters
|
|
124
Hyatt Hotels
H
$17.5B
| $7.38M | 0.2% |
38,080
+20,300
| +114% | +$3.56M |
2025 Q4
2 quarters
|
|
125
Planet Labs
PL
$5.05B
| $7.34M | 0.2% |
221,450
-64,200
| -22% | -$2.37M |
2025 Q3
3 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.