2026 Q1 Portfolio Activity
In 2026 Q1, CASTLEARK MANAGEMENT LLC maintained a portfolio of 347 distinct positions. The most significant new addition was DIAMONDBACK ENERGY INC, now representing 0.95% of the total fund value. They heavily accumulated shares in BAKER HUGHES COMPANY, increasing the position by 629.4%. The fund also reduced its exposure to MICROSOFT CORP by 28.5%.
Position History
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Total Positions
347
Quarter
2026 Q1
Top Holding
NVDA (7.3%)
Top 10 Concentration
32.2%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 347
CASTLEARK MANAGEMENT LLC Full Holdings List — 2026 Q1
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NVDA
NVIDIA CORPORAT...
|
Technology | 7.26% | 7.71% |
#1
Prev: #1
|
5.4 |
—
|
-150,134 | -10.7% |
P
S
|
1,258,012 | $219,397,293 |
$106.38
+98.5%
|
2020 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | ||
|
GOOGL
ALPHABET INC
|
Communication Services | 3.98% | 3.51% |
#2
1
Prev: #3
|
5.1 |
—
|
36,380 | 9.5% |
P
S
|
418,019 | $120,205,544 |
$114.24
+234.5%
|
2015 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | ||
|
MSFT
MICROSOFT CORP
|
Technology | 3.23% | 5.25% |
#3
1
Prev: #2
|
2.3 |
—
|
-105,358 | -28.5% |
P
S
|
264,102 | $97,762,637 |
$44.42
+897.9%
|
1999 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | ||
|
SPIB
SPDR SERIES TRU...
|
ETF | 2.98% | 2.50% |
#4
3
Prev: #7
|
3.7 |
—
|
169,010 | 6.7% |
P
S
|
2,688,380 | $90,168,265 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AAPL
APPLE INC
|
Technology | 2.94% | 3.09% |
#5
Prev: #5
|
2.2 |
—
|
-37,030 | -9.6% |
P
S
|
350,011 | $88,829,292 | 2001 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
GOVT
ISHARES TR
|
ETF | 2.52% | 2.25% |
#6
4
Prev: #10
|
2.0 |
—
|
no change | no change |
P
S
|
3,329,569 | $76,280,426 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
LRCX
LAM RESEARCH CO...
|
Technology | 2.38% | 1.87% |
#7
5
Prev: #12
|
1.5 |
—
|
-36,136 | -9.7% |
P
S
|
336,740 | $71,947,868 | 2018 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
META
META PLATFORMS ...
|
Communication Services | 2.35% | 2.37% |
#8
Prev: #8
|
1.4 |
—
|
1,550 | 1.3% |
P
S
|
123,965 | $70,924,095 | 2014 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
VMBS
VANGUARD SCOTTS...
|
ETF | 2.31% | 2.36% |
#9
Prev: #9
|
1.4 |
—
|
-217,740 | -12.8% |
P
S
|
1,487,800 | $69,852,210 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
LLY
ELI LILLY & CO
|
Healthcare | 2.24% | 2.57% |
#10
4
Prev: #6
|
1.4 |
—
|
-8,100 | -9.9% |
P
S
|
73,478 | $67,582,860 | 2002 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AVGO
BROADCOM INC
|
Technology | 2.08% | 2.09% |
#11
Prev: #11
|
1.3 |
—
|
-3,176 | -1.5% |
P
S
|
202,704 | $62,738,915 | 2016 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ANET
ARISTA NETWORKS...
|
Technology | 1.75% | 1.58% |
#12
5
Prev: #17
|
1.2 |
—
|
19,658 | 4.8% |
P
S
|
430,935 | $52,910,199 | 2017 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AMZN
AMAZON COM INC
|
Consumer Cyclical | 1.69% | 3.20% |
#13
9
Prev: #4
|
0.7 |
—
|
-226,288 | -47.9% |
P
S
|
245,861 | $51,205,470 | 2008 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
GILD
GILEAD SCIENCES...
|
Healthcare | 1.58% | 1.00% |
#14
7
Prev: #21
|
3.1 |
—
|
64,822 | 23.4% |
P
S
|
342,150 | $47,685,446 | 2001 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SCHW
SCHWAB CHARLES ...
|
Financial Services | 1.57% | 1.83% |
#15
2
Prev: #13
|
1.1 |
—
|
-118,482 | -19.0% |
P
S
|
504,053 | $47,370,901 | 1999 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
V
VISA INC
|
Financial Services | 1.54% | 1.76% |
#16
2
Prev: #14
|
1.1 |
—
|
-16,652 | -9.8% |
P
S
|
153,826 | $46,492,370 | 2014 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
MA
MASTERCARD INCO...
|
Financial Services | 1.52% | 1.72% |
#17
2
Prev: #15
|
1.1 |
—
|
-10,438 | -10.2% |
P
S
|
92,013 | $45,975,216 | 2007 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SPTS
SPDR SERIES TRU...
|
ETF | 1.29% | 1.15% |
#18
1
Prev: #19
|
1.5 |
—
|
no change | no change |
P
S
|
1,334,080 | $38,928,454 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SHOP
SHOPIFY INC
|
Technology | 1.22% | 1.63% |
#19
3
Prev: #16
|
1.0 |
—
|
-34,792 | -10.1% |
P
S
|
310,590 | $36,842,186 | 2016 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
GEV
GE VERNOVA INC
|
Industrials | 1.20% | 0.92% |
#20
5
Prev: #25
|
1.0 |
—
|
-6,252 | -13.1% |
P
S
|
41,489 | $36,215,748 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
VCLT
VANGUARD SCOTTS...
|
ETF | 1.11% | 0.53% |
#21
17
Prev: #38
|
3.4 |
—
|
211,880 | 89.6% |
P
S
|
448,330 | $33,499,218 | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
NOW
SERVICENOW INC
|
Technology | 1.05% | 1.22% |
#22
4
Prev: #18
|
2.4 |
—
|
33,336 | 12.3% |
P
S
|
303,756 | $31,757,690 | 2014 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TPR
TAPESTRY INC
|
Consumer Cyclical | 0.95% | 0.53% |
#23
13
Prev: #36
|
2.9 |
—
|
62,386 | 43.9% |
P
S
|
204,470 | $28,852,762 | 2017 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
FANG
DIAMONDBACK ENE...
|
Energy | 0.95% | — |
#24
Prev: #—
|
3.9 |
—
|
145,020 | — |
NEW
|
145,020 | $28,683,506 | 2014 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CVX
CHEVRON CORPORA...
|
Energy | 0.93% | — |
#25
Prev: #—
|
3.9 |
—
|
136,550 | — |
NEW
|
136,550 | $28,252,195 | 2001 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
VRT
VERTIV HOLDINGS...
|
Industrials | 0.93% | 0.59% |
#26
6
Prev: #32
|
0.9 |
—
|
-12,374 | -9.9% |
P
S
|
112,363 | $28,155,921 | 2022 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ULTA
ULTA BEAUTY INC
|
Consumer Cyclical | 0.88% | 0.89% |
#27
1
Prev: #26
|
0.9 |
—
|
688 | 1.4% |
P
S
|
50,629 | $26,464,285 | 2008 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TLH
ISHARES TR
|
ETF | 0.86% | 0.77% |
#28
Prev: #28
|
1.3 |
—
|
no change | no change |
P
S
|
258,432 | $26,029,271 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ADI
ANALOG DEVICES ...
|
Technology | 0.82% | 0.49% |
#29
11
Prev: #40
|
2.8 |
—
|
16,736 | 27.4% |
P
S
|
77,908 | $24,785,651 | 2009 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
BKR
BAKER HUGHES CO...
|
Energy | 0.78% | 0.07% |
#30
162
Prev: #192
|
3.3 |
—
|
334,110 | 629.4% |
P
S
|
387,190 | $23,637,950 | 2021 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
BKNG
BOOKING HOLDING...
|
Consumer Cyclical | 0.68% | 0.86% |
#31
4
Prev: #27
|
0.8 |
—
|
-576 | -10.5% |
P
S
|
4,896 | $20,613,727 | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
SNOW
SNOWFLAKE INC
|
Technology | 0.68% | 0.97% |
#32
9
Prev: #23
|
0.8 |
—
|
-15,148 | -10.0% |
P
S
|
136,044 | $20,518,156 | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
MBB
ISHARES TR
|
ETF | 0.64% | 0.57% |
#33
Prev: #33
|
1.3 |
—
|
no change | no change |
P
S
|
204,235 | $19,392,113 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
RRC
RANGE RES CORP
|
Energy | 0.61% | 0.08% |
#34
155
Prev: #189
|
3.2 |
—
|
336,500 | 454.6% |
P
S
|
410,520 | $18,547,294 | 2007 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AMD
ADVANCED MICRO ...
|
Technology | 0.60% | 0.66% |
#35
4
Prev: #31
|
0.7 |
—
|
-15,792 | -15.1% |
P
S
|
88,954 | $18,095,912 | 2000 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
CF
CF INDUSTRIES H...
|
Basic Materials | 0.55% | — |
#36
Prev: #—
|
3.7 |
—
|
129,150 | — |
NEW
|
129,150 | $16,768,836 | 2008 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
DOCN
DIGITALOCEAN HL...
|
Technology | 0.52% | 0.26% |
#37
42
Prev: #79
|
0.7 |
—
|
-2,740 | -1.5% |
P
S
|
182,249 | $15,633,319 | 2021 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
ASND
ASCENDIS PHARMA...
|
Healthcare | 0.51% | 0.42% |
#38
6
Prev: #44
|
0.7 |
—
|
1,280 | 1.9% |
P
S
|
67,616 | $15,465,808 | 2019 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
AEIS
ADVANCED ENERGY...
|
Industrials | 0.50% | 0.30% |
#39
24
Prev: #63
|
0.7 |
—
|
-2,510 | -5.1% |
P
S
|
46,623 | $15,045,708 | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
JPM
JPMORGAN CHASE ...
|
Financial Services | 0.49% | 0.42% |
#40
2
Prev: #42
|
2.2 |
—
|
5,890 | 13.2% |
P
S
|
50,525 | $14,862,434 | 2003 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
GH
GUARDANT HEALTH...
|
Healthcare | 0.49% | 0.49% |
#41
2
Prev: #39
|
0.7 |
—
|
-4,760 | -2.9% |
P
S
|
160,283 | $14,805,341 | 2019 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TSLA
TESLA INC
|
Consumer Cyclical | 0.48% | 0.37% |
#42
8
Prev: #50
|
2.7 |
—
|
11,080 | 39.4% |
P
S
|
39,180 | $14,565,165 | 2017 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TJX
TJX COS INC NEW
|
Consumer Cyclical | 0.48% | 0.41% |
#43
4
Prev: #47
|
1.2 |
—
|
no change | no change |
P
S
|
90,620 | $14,472,014 | 2007 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
WMT
WALMART INC
|
Consumer Defensive | 0.47% | 0.37% |
#44
7
Prev: #51
|
1.2 |
—
|
no change | no change |
P
S
|
113,270 | $14,077,196 | 1999 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
TSM
TAIWAN SEMICOND...
|
Technology | 0.46% | 0.32% |
#45
13
Prev: #58
|
2.2 |
—
|
4,920 | 13.6% |
P
S
|
41,210 | $13,926,920 | 2002 Q2 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
IGIB
ISHARES TR
|
ETF | 0.46% | 0.41% |
#46
Prev: #46
|
1.2 |
—
|
no change | no change |
P
S
|
259,994 | $13,836,881 | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
NXT
NEXTPOWER INC
|
Technology | 0.46% | 0.27% |
#47
25
Prev: #72
|
2.2 |
—
|
8,590 | 8.1% |
P
S
|
114,074 | $13,751,621 | 2024 Q1 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
PR
PERMIAN RESOURC...
|
Energy | 0.45% | — |
#48
Prev: #—
|
3.7 |
—
|
630,980 | — |
NEW
|
630,980 | $13,452,494 | 2022 Q3 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
FCFS
FIRSTCASH HOLDI...
|
Financial Services | 0.44% | 0.29% |
#49
18
Prev: #67
|
2.2 |
—
|
9,530 | 15.6% |
P
S
|
70,730 | $13,297,240 | 2018 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 | |||
|
MCHP
MICROCHIP TECHN...
|
Technology | 0.44% | 0.96% |
#50
26
Prev: #24
|
0.2 |
—
|
-310,620 | -60.3% |
P
S
|
204,874 | $13,236,909 | 2002 Q4 | 13F Filing | 2026-03-31 | 2026-05-15 |
Showing 1-50 of 347 holdings