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CASTLEARK MANAGEMENT LLC
Period ended Jun 30, 2026 · Latest filing Aug 14, 2026
These quarterly holdings are delayed and may not include all assets or short positions.
Values are from the reporting date, not current prices or purchase costs.
The same security may appear in multiple rows.
Source: SEC
Reported portfolio value
Quarter-end reported holdings; not current value or investment performance.
View reported values
- Jun 30, 2026: $3,709,338,225
More quarters will appear as history becomes available.
Top holdings
Top 10 at Jun 30, 2026. Matching entries are combined; security classes and options remain separate. Shares exclude principal amounts; option shares reflect the reported underlying amount.
View top holdings values
- NVIDIA CORPORATION · COM · 67066G104 · shares: $260,037,964
- ALPHABET INC · CAP STK CL A · 02079K305 · shares: $181,219,825
- APPLE INC · COM · 037833100 · shares: $136,609,171
- LAM RESEARCH CORP · COM NEW · 512807306 · shares: $122,982,521
- MICROSOFT CORP · COM · 594918104 · shares: $109,209,065
- ELI LILLY & CO · COM · 532457108 · shares: $105,186,413
- BROADCOM INC · COM · 11135F101 · shares: $92,131,714
- SPDR SERIES TRUST · ST INTER BD ETF · 78464A375 · shares: $89,953,195
- VISA INC · COM CL A · 92826C839 · shares: $81,026,193
- ARISTA NETWORKS INC · COM SHS · 040413205 · shares: $80,407,432
Reported holdings
309 reported entries| Issuer | Class | CUSIP | Type | Shares / principal | Reported value (USD) |
|---|---|---|---|---|---|
| ISHARES TR | IBOXX INV CP ETF | 464287242 | — | 19,300 shares | $2,105,051 |
| NEXTPOWER INC | CLASS A COM | 65290E101 | — | 17,350 shares | $2,067,079 |
| ARCOSA INC | COM | 039653100 | — | 14,090 shares | $2,047,136 |
| FTAI AVIATION LTD | SHS | G3730V105 | — | 7,446 shares | $2,014,366 |
| FERRARI N V | COM | N3167Y103 | — | 5,310 shares | $1,976,860 |
| CHEVRON CORPORATION | COM | 166764100 | — | 11,850 shares | $1,964,256 |
| V F CORP | COM | 918204108 | — | 115,750 shares | $1,930,710 |
| VARONIS SYS INC | COM | 922280102 | — | 45,950 shares | $1,928,062 |
| DICKS SPORTING GOODS INC | COM | 253393102 | — | 8,440 shares | $1,914,276 |
| MAGNOLIA OIL & GAS CORP | CL A | 559663109 | — | 74,790 shares | $1,913,128 |
| ISHARES INC | MSCI BRAZIL ETF | 464286400 | — | 55,320 shares | $1,908,540 |
| ISHARES TR | RUS 1000 GRW ETF | 464287614 | — | 15,080 shares | $1,872,484 |
| MPLX LP | COM UNIT REP LTD | 55336V100 | — | 32,092 shares | $1,807,742 |
| LINCOLN ELEC HLDGS INC | COM | 533900106 | — | 6,700 shares | $1,778,917 |
| SPDR SERIES TRUST | SP O&G EXPL PRO | 78468R556 | — | 11,470 shares | $1,769,362 |
| VALERO ENERGY CORP | COM | 91913Y100 | — | 6,600 shares | $1,718,904 |
| FLEX LTD | ORD | Y2573F102 | — | 10,580 shares | $1,714,701 |
| ARCHROCK INC | COM | 03957W106 | — | 41,660 shares | $1,695,979 |
| CAMTEK LTD | ORD | M20791105 | — | 9,830 shares | $1,603,470 |
| PLAINS ALL AMERN PIPELINE L | UNIT LTD PARTN | 726503105 | — | 70,459 shares | $1,568,417 |
| CARPENTER TECHNOLOGY CORP | COM | 144285103 | — | 2,480 shares | $1,529,763 |
| DT MIDSTREAM INC | COMMON STOCK | 23345M107 | — | 9,830 shares | $1,442,454 |
| SPINNAKER ETF SERIES | SELE STO EUR ETF | 84858T772 | — | 30,800 shares | $1,299,144 |
| SITIME CORP | COM | 82982T106 | — | 1,731 shares | $1,290,564 |
| QUALCOMM INC | COM | 747525103 | — | 6,950 shares | $1,284,291 |
| CONSTELLATION ENERGY CORP | COM | 21037T109 | — | 5,120 shares | $1,271,654 |
| NRG ENERGY INC | COM NEW | 629377508 | — | 8,410 shares | $1,228,365 |
| WOODWARD INC | COM | 980745103 | — | 2,720 shares | $1,157,197 |
| KODIAK GAS SVCS INC | COM | 50012A108 | — | 15,320 shares | $1,150,992 |
| TERADYNE INC | COM | 880770102 | — | 2,339 shares | $1,131,702 |
| MASTEC INC | COM | 576323109 | — | 2,690 shares | $1,119,201 |
| OLD DOMINION FREIGHT LINE IN | COM | 679580100 | — | 5,160 shares | $1,117,656 |
| VIPER ENERGY INC | CL A | 64361Q101 | — | 24,425 shares | $1,035,620 |
| TRANSDIGM GROUP INC | COM | 893641100 | — | 770 shares | $1,025,671 |
| ANTERO MIDSTREAM CORP | COM | 03676B102 | — | 43,680 shares | $993,720 |
| QUANTA SVCS INC | COM | 74762E102 | — | 1,380 shares | $993,655 |
| FIRST TR EXCHANGE-TRADED FD | GBL WND ENRG ETF | 33736G106 | — | 39,412 shares | $984,512 |
| SUNOCO LP/SUNOCO FIN CORP | COM UT REP LP | 86765K109 | — | 14,450 shares | $975,375 |
| TOWER SEMICONDUCTOR LTD | SHS NEW | M87915274 | — | 3,680 shares | $959,155 |
| VIAVI SOLUTIONS INC | COM | 925550105 | — | 20,041 shares | $956,958 |
| ATI INC | COM | 01741R102 | — | 4,830 shares | $951,993 |
| BKV CORP | COM | 05603J108 | — | 32,650 shares | $893,304 |
| ISHARES TR | EUROPE ETF | 464287861 | — | 12,100 shares | $881,485 |
| SCHWAB CHARLES CORP | COM | 808513105 | — | 9,360 shares | $863,647 |
| FIRST SOLAR INC | COM | 336433107 | — | 3,660 shares | $863,614 |
| ROCKET LAB CORP | COM | 773121108 | — | 8,230 shares | $836,580 |
| INSMED INC | COM PAR $.01 | 457669307 | — | 7,790 shares | $830,570 |
| KIRBY CORP | COM | 497266106 | — | 5,930 shares | $806,302 |
| VERISIGN INC | COM | 92343E102 | — | 3,190 shares | $802,476 |
| NEXTDECADE CORP | COM | 65342K105 | — | 106,250 shares | $801,125 |
| EMCOR GROUP INC | COM | 29084Q100 | — | 910 shares | $755,191 |
| NATERA INC | COM | 632307104 | — | 2,780 shares | $754,631 |
| CME GROUP INC | COM | 12572Q105 | — | 3,400 shares | $750,822 |
| RAMBUS INC DEL | COM | 750917106 | — | 5,610 shares | $744,671 |
| RIOT PLATFORMS INC | COM | 767292105 | — | 26,120 shares | $715,166 |
| HESS MIDSTREAM LP | CL A SHS | 428103105 | — | 18,795 shares | $706,692 |
| PACCAR INC | COM | 693718108 | — | 5,774 shares | $693,573 |
| ENTERGY CORP NEW | COM | 29364G103 | — | 5,970 shares | $685,714 |
| VISTRA CORP | COM | 92840M102 | — | 4,160 shares | $659,901 |
| SYNOPSYS INC | COM | 871607107 | — | 1,372 shares | $612,008 |
| GOLAR LNG LTD | SHS | G9456A100 | — | 12,210 shares | $608,546 |
| NATIONAL FUEL GAS CO | COM | 636180101 | — | 7,660 shares | $591,429 |
| WESTERN MIDSTREAM PARTNERS L | COM UNIT LP INT | 958669103 | — | 13,390 shares | $585,946 |
| NEXTERA ENERGY INC | COM | 65339F101 | — | 6,650 shares | $583,671 |
| PROCTER & GAMBLE CO | COM | 742718109 | — | 3,800 shares | $557,232 |
| JONES LANG LASALLE INC | COM | 48020Q107 | — | 1,720 shares | $533,114 |
| USA COMPRESSION PARTNERS LP | COM UNIT LTDPAR | 90290N109 | — | 19,990 shares | $527,536 |
| CINTAS CORP | COM | 172908105 | — | 2,960 shares | $503,437 |
| KINETIK HOLDINGS INC | COM NEW CL A | 02215L209 | — | 10,370 shares | $501,286 |
| VENTURE GLOBAL INC | COM CL A | 92333F101 | — | 43,870 shares | $488,273 |
| AMERICAN ELEC PWR CO INC | COM | 025537101 | — | 3,510 shares | $480,203 |
| INTUITIVE SURGICAL INC | COM NEW | 46120E602 | — | 1,200 shares | $477,216 |
| ISHARES TR | RUS 2000 GRW ETF | 464287648 | — | 1,200 shares | $472,752 |
| STARBUCKS CORP | COM | 855244109 | — | 4,620 shares | $472,118 |
| BLOOM ENERGY CORP | COM CL A | 093712107 | — | 1,460 shares | $441,942 |
| MATADOR RES CO | COM | 576485205 | — | 8,350 shares | $415,663 |
| EOG RES INC | COM | 26875P101 | — | 3,000 shares | $389,190 |
| MOOG INC | CL A | 615394202 | — | 860 shares | $364,502 |
| VERTEX PHARMACEUTICALS INC | COM | 92532F100 | — | 730 shares | $362,613 |
| ISHARES INC | MSCI JAPAN ETF | 46434G822 | — | 3,870 shares | $360,955 |
| POWELL INDS INC | COM | 739128106 | — | 1,230 shares | $352,223 |
| ALBEMARLE CORP | COM | 012653101 | — | 2,420 shares | $326,773 |
| FEDEX CORP | COM | 31428X106 | — | 1,000 shares | $313,130 |
| DIODES INC | COM | 254543101 | — | 2,640 shares | $288,922 |
| MARTIN MARIETTA MATLS INC | COM | 573284106 | — | 480 shares | $276,816 |
| COCA COLA CO | COM | 191216100 | — | 3,397 shares | $276,074 |
| ISHARES INC | MSCI TAIWAN ETF | 46434G772 | — | 2,510 shares | $272,611 |
| EATON CORP PLC | SHS | G29183103 | — | 590 shares | $251,411 |
| IREN LIMITED | ORDINARY SHARES | Q4982L109 | — | 5,250 shares | $240,083 |
| ISHARES TR | RUS 2000 VAL ETF | 464287630 | — | 1,060 shares | $234,472 |
| TALEN ENERGY CORP | COM | 87422Q109 | — | 600 shares | $230,556 |
| FREEPORT MCMORAN INC | CL B | 35671D857 | — | 3,610 shares | $227,033 |
| GENTEX CORP | COM | 371901109 | — | 8,620 shares | $217,827 |
| CUMMINS INC | COM | 231021106 | — | 300 shares | $213,963 |
| ISHARES INC | MSCI CDA ETF | 464286509 | — | 3,670 shares | $211,539 |
| ILLINOIS TOOL WKS INC | COM | 452308109 | — | 770 shares | $208,262 |
| SOMNIGROUP INTERNATIONAL INC | COM | 88023U101 | — | 2,090 shares | $163,856 |
| ISHARES TR | ISHARES SEMICDTR | 464287523 | — | 230 shares | $147,375 |
| ISHARES TR | MSCI EMG MKT ETF | 464287234 | — | 2,000 shares | $136,820 |
| TRIMBLE INC | COM | 896239100 | — | 2,160 shares | $110,549 |