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 | |
|---|---|---|---|---|---|---|---|
176
Champion Homes
SKY
$5.18B
| $4.02M | 0.11% |
+45,670
| New | +$3.5M |
2026 Q2
0 quarters
|
|
177
ServiceTitan Inc
TTAN
$7.96B
| $3.95M | 0.11% |
+55,890
| New | +$3.6M |
2026 Q2
0 quarters
|
|
178
Invesco QQQ Trust
QQQ
$461B
| $3.92M | 0.11% |
5,320
| – | – |
2025 Q4
2 quarters
|
|
179
Cogent Biosciences
COGT
$5.84B
| $3.86M | 0.1% |
99,870
+35,920
| +56% | +$1.26M |
2026 Q1
1 quarter
|
|
180
Xenon Pharmaceuticals
XENE
$3.92B
| $3.73M | 0.1% |
61,763
-2,800
| -4% | -$155K |
2026 Q1
1 quarter
|
|
181
Dell
DELL
$220B
| $3.68M | 0.1% |
+8,540
| New | +$2.47M |
2026 Q2
0 quarters
|
|
182
Kinder Morgan
KMI
$68.1B
| $3.67M | 0.1% |
114,730
| – | – |
2024 Q4
6 quarters
|
|
183
Arcutis Biotherapeutics
ARQT
$3.31B
| $3.6M | 0.1% |
137,420
-156,040
| -53% | -$3.64M |
2025 Q4
2 quarters
|
|
184
Microchip Technology
MCHP
$33.5B
| $3.1M | 0.08% |
34,000
-170,874
| -83% | -$15.2M |
2013 Q2
52 quarters
|
|
185
Oneok
OKE
$54.2B
| $3M | 0.08% |
34,458
| – | – |
2017 Q3
35 quarters
|
|
186
TechnipFMC
FTI
$24.9B
| $2.96M | 0.08% |
44,676
-90,500
| -67% | -$6.41M |
2022 Q4
14 quarters
|
|
187
Enterprise Products Partners
EPD
$79.1B
| $2.92M | 0.08% |
79,461
| – | – |
2013 Q2
52 quarters
|
|
188
PTC Therapeutics
PTCT
$5.43B
| $2.77M | 0.07% |
33,900
-57,980
| -63% | -$4.19M |
2025 Q4
2 quarters
|
|
189
ExxonMobil
XOM
$672B
| $2.76M | 0.07% |
20,170
-44,290
| -69% | -$6.63M |
2026 Q1
1 quarter
|
|
190
Toll Brothers
TOL
$14.4B
| $2.73M | 0.07% |
16,573
-34,830
| -68% | -$4.95M |
2025 Q1
5 quarters
|
|
191
Enbridge
ENB
$106B
| $2.73M | 0.07% |
50,340
| – | – |
2025 Q3
3 quarters
|
|
192
Madrigal Pharmaceuticals
MDGL
$10.1B
| $2.73M | 0.07% |
5,076
-220
| -4% | -$113K |
2025 Q3
3 quarters
|
|
193
Costco
COST
$472B
| $2.62M | 0.07% |
2,800
| – | – |
2013 Q2
52 quarters
|
|
194
Occidental Petroleum
OXY
$55.7B
| $2.55M | 0.07% |
52,585
| – | – |
2020 Q4
22 quarters
|
|
195
iShares MSCI South Korea ETF
EWY
$20.8B
| $2.54M | 0.07% |
12,560
+11,720
| +1,395% | +$2.07M |
2025 Q4
2 quarters
|
|
196
Extreme Networks
EXTR
$3.36B
| $2.49M | 0.07% |
+77,040
| New | +$1.86M |
2026 Q2
0 quarters
|
|
197
Alphabet (Google) Class C
GOOG
$3.52T
| $2.47M | 0.07% |
7,000
-22,610
| -76% | -$8.08M |
2015 Q4
42 quarters
|
|
198
Spyre Therapeutics
SYRE
$10.4B
| $2.35M | 0.06% |
+26,420
| New | +$1.93M |
2026 Q2
0 quarters
|
|
199
iShares Russell Mid-Cap Growth ETF
IWP
$18.1B
| $2.34M | 0.06% |
16,000
| – | – |
2016 Q3
39 quarters
|
|
200
Sterling Infrastructure
STRL
$8.87B
| $2.19M | 0.06% |
2,610
-18,590
| -88% | -$13M |
2025 Q2
4 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.