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Super Investors CASTLEARK MANAGEMENT LLC
CM

CASTLEARK MANAGEMENT LLC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$3.71B
Positions
309
Quarter ended
June 30, 2026
Filed
August 14, 2026

Reported portfolio value by quarter (53 quarters reported)

$4.15B $1.69B
Q2 13 Q1 16 Q4 18 Q3 21 Q2 24 Q2 26

$3.01B in Q2 2013 → $3.71B now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Nvidia Corporation 7.0% Added 3.3% 1,299,605 $260M
Alphabet Inc 4.9% Added 21% 507,093 $181M
Apple Inc 3.7% Added 35% 472,108 $137M
Lam Research Corp 3.3% Trimmed 16% 283,808 $123M
Microsoft Corp 2.9% Added 11% 292,770 $109M
EL Eli Lilly & Co 2.8% Added 19% 87,697 $105M
Broadcom Inc 2.5% Added 20% 243,896 $92.1M
SS SPDR Series Trust 2.4% Unchanged 2,688,380 $90M
Visa Inc 2.2% Added 54% 236,166 $81M
Arista Networks Inc 2.2% Added 9.8% 473,319 $80.4M
IT Ishares Tr 2.0% Unchanged 3,329,569 $75.8M
VS Vanguard Scottsdale Fds 1.9% Unchanged 1,487,800 $69.6M
Advanced Micro Devices Inc 1.9% Added 34% 118,865 $69M
Gilead Sciences Inc 1.8% Added 54% 527,542 $66.6M
Amazon Com Inc 1.7% Added 9.1% 268,249 $63.9M
Ge Vernova Inc 1.5% Added 11% 46,101 $54.2M
Meta Platforms Inc 1.4% Trimmed 24% 93,744 $52.8M
Analog Devices Inc 1.3% Added 55% 120,934 $48M
Mastercard Incorporated 1.3% Trimmed 0.6% 91,462 $47M
Morgan Stanley 1.2% Added 781% 208,542 $43.6M
Snowflake Inc 1.1% Added 23% 166,818 $42.5M
Vertiv Holdings Co 1.1% Added 10% 123,901 $41.5M
Tapestry Inc 1.0% Added 30% 265,749 $38.9M
SS SPDR Series Trust 1.0% Unchanged 1,334,080 $38.7M
VS Vanguard Scottsdale Fds 0.9% Unchanged 448,330 $33.7M
Servicenow Inc 0.9% Added 5.9% 321,623 $31.9M
IT Ishares Tr 0.7% Unchanged 258,432 $25.9M
Booking Holdings Inc 0.7% Added 2694% 136,776 $24.4M
M Moodys Corp 0.7% Added 216% 53,444 $24.2M
Tesla Inc 0.5% Added 23% 48,070 $20.2M
Caterpillar Inc 0.5% Added 36% 18,980 $20.2M
GA Ge Aerospace 0.5% Added 72% 52,830 $19.7M
TS Taiwan Semiconductor Manufac 0.5% Unchanged 41,210 $19.7M
Ligand Pharmaceuticals Inc 0.5% Added 27% 62,043 $19.6M
Sharkninja Inc 0.5% New 127,170 $19.4M
IT Ishares Tr 0.5% Unchanged 204,235 $19.3M
Twilio Inc 0.5% Added 245% 92,390 $19.1M
Baker Hughes Company 0.5% Trimmed 15% 330,020 $18.3M
Garrett Motion Inc 0.5% Trimmed 3.8% 469,470 $17M
Jpmorgan Chase & Co 0.4% Unchanged 50,525 $16.5M
Ascendis Pharma A/s 0.4% New 61,696 $16.5M
HJ Hunt J B Trans Svcs Inc 0.4% Added 150% 56,520 $16.4M
Diamondback Energy Inc 0.4% Trimmed 37% 90,680 $15.9M
GM General Mtrs Co 0.4% Added 101% 199,440 $15.4M
BH Brightspring Health Svcs Inc 0.4% Trimmed 14% 212,430 $14.8M
Semtech Corp 0.4% Trimmed 15% 91,218 $14.8M
FH Firstcash Holdings Inc 0.4% Trimmed 3.6% 68,190 $14.8M
MI Marriott Intl Inc New 0.4% Added 353% 37,910 $14M
IT Ishares Tr 0.4% Unchanged 259,994 $13.8M
TC Tjx Cos Inc New 0.4% Unchanged 90,620 $13.7M
Uber Technologies Inc 0.4% Added 12% 189,417 $13.7M
UC Ultra Clean Hldgs Inc 0.4% Trimmed 4.4% 95,770 $13.7M
Novanta Inc 0.4% Added 138% 83,190 $13.5M
Axon Enterprise Inc 0.4% Added 164% 23,423 $13.1M
Boeing Co 0.3% Added 128% 59,520 $12.9M
SS SPDR Series Trust 0.3% Unchanged 80,890 $12.8M
Element Solutions Inc 0.3% Trimmed 3.7% 263,644 $12.6M
Myr Group Inc 0.3% Added 42% 24,920 $12.5M
Guardant Health Inc 0.3% Trimmed 50% 80,293 $12M
IT Ishares Tr 0.3% Unchanged 137,270 $11.9M

Showing top 60 of 309 positions.

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 14, 2026

Company Action Shares changed Value of change % of portfolio
SC Schwab Charles Corp Trimmed −494,693 −$45.6M —
Morgan Stanley Added +184,862 +$38.6M 1.2%
Apple Inc Added +122,097 +$35.3M 3.7%
Alphabet Inc Added +89,074 +$31.8M 4.9%
Visa Inc Added +82,340 +$28.3M 2.2%
Ulta Beauty Inc Exited −50,629 −$26.5M —
Shopify Inc Trimmed −223,426 −$25.5M 0.3%
Booking Holdings Inc Added +131,880 +$23.5M 0.7%
Gilead Sciences Inc Added +185,392 +$23.4M 1.8%
DH Digitalocean Hldgs Inc Trimmed −146,712 −$23M 0.2%

Showing the 10 largest of 260 changes.

Q1 2026

quarter ended March 31, 2026 · filed May 15, 2026

Company Action Shares changed Value of change % of portfolio
Amazon Com Inc Trimmed −226,288 −$47.1M 1.7%
Microsoft Corp Trimmed −105,358 −$39M 3.2%
Blackstone Inc Exited −244,268 −$37.7M —
IT Ishares Tr Exited −347,580 −$33.4M —
Diamondback Energy Inc New +145,020 +$28.7M 0.9%
Chevron Corporation New +136,550 +$28.3M 0.9%
Nvidia Corporation Trimmed −150,134 −$26.2M 7.3%
Insulet Corp Exited −80,957 −$23M —
LH Lumentum Hldgs Inc Trimmed −30,383 −$21.4M —
Baker Hughes Company Added +334,110 +$20.4M 0.8%

Showing the 10 largest of 274 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 13, 2026

Company Action Shares changed Value of change % of portfolio
AI Advisors Inner Circle Fd Ii Exited −7,383,950 −$322M —
Netflix Inc Exited −54,948 −$65.9M —
EL Eli Lilly & Co Added +37,025 +$39.8M 2.6%
Servicenow Inc Added +217,442 +$33.3M 1.2%
Ulta Beauty Inc New +49,941 +$30.2M 0.9%
Lam Research Corp Trimmed −131,244 −$22.5M 1.9%
Advanced Micro Devices Inc New +104,746 +$22.4M 0.7%
Dexcom Inc Exited −300,249 −$20.2M —
Amazon Com Inc Added +81,542 +$18.8M 3.2%
Booking Holdings Inc Added +3,412 +$18.3M 0.9%

Showing the 10 largest of 285 changes.

Q3 2025

quarter ended September 30, 2025 · filed November 17, 2025

Company Action Shares changed Value of change % of portfolio
Broadcom Inc New +205,886 +$67.9M 1.9%
Arista Networks Inc Trimmed −420,135 −$61.2M 1.6%
PM Philip Morris Intl Inc Trimmed −287,894 −$46.7M 0.2%
AI Advisors Inner Circle Fd Ii Trimmed −1,064,770 −$46.4M 9.0%
Amazon Com Inc Trimmed −208,000 −$45.7M 2.4%
Intuitive Surgical Inc Trimmed −90,499 −$40.5M —
Trane Technologies PLC Exited −78,332 −$34.3M —
SC Schwab Charles Corp Added +269,434 +$25.7M 1.6%
Ge Vernova Inc Added +41,693 +$25.6M 0.8%
Microchip Technology Inc. Added +330,644 +$21.2M 0.9%

Showing the 10 largest of 245 changes.

Q2 2025

quarter ended June 30, 2025 · filed August 18, 2025

Company Action Shares changed Value of change % of portfolio
Microsoft Corp Added +96,392 +$47.9M 5.6%
Nvidia Corporation Added +294,838 +$46.6M 6.7%
PM Philip Morris Intl Inc Added +247,129 +$45M 1.8%
Apple Inc Trimmed −210,435 −$43.2M 2.4%
Snowflake Inc New +153,530 +$34.4M 1.0%
IQ Invesco Qqq Tr Exited −66,630 −$31.2M —
SC Schwab Charles Corp Added +332,880 +$30.4M 0.9%
Lam Research Corp Added +295,712 +$28.8M 1.5%
Dexcom Inc New +311,342 +$27.2M 0.8%
Blackstone Inc Trimmed −178,772 −$26.7M 0.9%

Showing the 10 largest of 293 changes.

Q1 2025

quarter ended March 31, 2025 · filed May 15, 2025

Company Action Shares changed Value of change % of portfolio
AI Advisors Inner Circle Fd Ii New +8,394,730 +$295M 10.2%
SS SPDR Ser Tr Trimmed −1,712,080 −$56.9M 2.4%
IT Ishares Tr Added +2,458,450 +$56.5M 3.2%
AG Apollo Global Mgmt Inc Exited −226,890 −$37.5M —
Broadcom Inc Trimmed −208,810 −$35M 0.3%
IQ Invesco Qqq Tr New +66,630 +$31.2M 1.1%
EL Eli Lilly & Co Added +36,926 +$30.5M 2.3%
Microsoft Corp Trimmed −64,322 −$24.1M 3.6%
AP Accenture PLC Ireland New +59,394 +$18.5M 0.6%
Apple Inc Trimmed −73,778 −$16.4M 4.6%

Showing the 10 largest of 283 changes.

Q4 2024

quarter ended December 31, 2024 · filed February 18, 2025

Company Action Shares changed Value of change % of portfolio
SS SPDR Ser Tr New +3,757,660 +$123M 4.3%
VS Vanguard Scottsdale Fds New +1,609,080 +$73M 2.5%
Arista Networks Inc New +607,360 +$67.1M 2.3%
Broadcom Inc New +260,820 +$60.5M 2.1%
Lam Research Corp Exited −55,979 −$45.7M —
UP Union Pac Corp Exited −184,554 −$45.5M —
The Trade Desk Inc New +384,850 +$45.2M 1.6%
AG Apollo Global Mgmt Inc New +226,890 +$37.5M 1.3%
IT Ishares Tr New +1,621,369 +$37.3M 1.3%
Colgate Palmolive Co Exited −325,133 −$33.8M —

Showing the 10 largest of 263 changes.

Q3 2024

quarter ended September 30, 2024 · filed November 15, 2024

Company Action Shares changed Value of change % of portfolio
Blackstone Inc New +440,620 +$67.5M 2.8%
Dexcom Inc Exited −438,078 −$49.7M —
Stryker Corporation Trimmed −121,652 −$43.9M —
IT Ishares Tr Trimmed −287,570 −$24M 0.3%
Toll Brothers Inc New +152,950 +$23.6M 1.0%
Nvidia Corporation Trimmed −178,505 −$21.7M 6.4%
Home Depot Inc Added +53,450 +$21.7M 1.2%
Starbucks Corp Added +219,480 +$21.4M 0.9%
Vertex Pharmaceuticals Inc Added +35,922 +$16.7M 1.6%
Freeport-mcmoran Inc Trimmed −319,450 −$15.9M —

Showing the 10 largest of 229 changes.

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