Holders — by stockHoldings — by fund
Atika Capital Management LLC
Everything this manager disclosed owning in US-listed stocks — its complete Form 13F portfolio · as of 2026-06-30 · filed with the SEC up to 45 days after quarter end · CIK 0001599731
$1.52B
disclosed book value
75
positions
14.7%
largest position share
Positions, as of 2026-06-30
top 81 of 75 · 13F covers long US-listed positions only — cash, bonds, private and foreign stakes are not disclosed · PUT/CALL tags = options positions (share-equivalents), not shares held
| # | Issuer | Shares | Value | % of book |
|---|---|---|---|---|
| 1 | VRTVERTIV HOLDINGS CO | 666,100 | $223.0M | 14.7% |
| 2 | XBISPDR SERIES TRUSTPUT | 5,625 | $89.0M | 5.9% |
| 3 | SEAGATE TECHNOLOGY HLDNGS PL | 79,865 | $77.1M | 5.1% |
| 4 | QQQINVESCO QQQ TRPUT | 1,000 | $73.6M | 4.8% |
| 5 | GEVGE VERNOVA INCPUT | 500 | $58.7M | 3.9% |
| 6 | AMDADVANCED MICRO DEVICES INC | 95,500 | $55.5M | 3.6% |
| 7 | AMZNAMAZON COM INCCALL | 2,220 | $52.9M | 3.5% |
| 8 | LLYELI LILLY & CO | 41,100 | $49.3M | 3.2% |
| 9 | QQQINVESCO QQQ TRCALL | 660 | $48.6M | 3.2% |
| 10 | INTCINTEL CORP | 264,000 | $36.9M | 2.4% |
| 11 | MUMICRON TECHNOLOGY INCPUT | 300 | $34.6M | 2.3% |
| 12 | ECHOECHOSTAR CORP | 331,400 | $33.6M | 2.2% |
| 13 | SMHVANECK ETF TRUSTPUT | 510 | $33.5M | 2.2% |
| 14 | GHGUARDANT HEALTH INC | 181,000 | $27.2M | 1.8% |
| 15 | IGVISHARES TRPUT | 2,720 | $24.6M | 1.6% |
| 16 | CIENCIENA CORP | 48,768 | $23.9M | 1.6% |
| 17 | ISRGINTUITIVE SURGICAL INC | 57,216 | $22.8M | 1.5% |
| 18 | BTIBRITISH AMERN TOB PLCCALL | 3,300 | $20.4M | 1.3% |
| 19 | IBITISHARES BITCOIN TRUST ETFPUT | 6,000 | $20.0M | 1.3% |
| 20 | VPGVISHAY PRECISION GROUP INC | 118,000 | $17.7M | 1.2% |
| 21 | MRVLMARVELL TECHNOLOGY INC | 58,000 | $17.3M | 1.1% |
| 22 | RKLBROCKET LAB CORP | 169,000 | $17.2M | 1.1% |
| 23 | WDCWESTERN DIGITAL CORP | 26,477 | $16.9M | 1.1% |
| 24 | RVMDREVOLUTION MEDICINES INC | 88,000 | $16.5M | 1.1% |
| 25 | ASCENDIS PHARMA A/S | 61,000 | $16.3M | 1.1% |
| 26 | DNTHDIANTHUS THERAPEUTICS INC | 165,000 | $16.1M | 1.1% |
| 27 | DRAMROUNDHILL ETF TRUSTPUT | 2,100 | $15.5M | 1% |
| 28 | AXSMAXSOME THERAPEUTICS INC. | 63,000 | $15.4M | 1% |
| 29 | TEVATEVA PHARMACEUTICAL INDS LTD | 440,000 | $14.9M | 1% |
| 30 | MTZMASTEC INC | 35,500 | $14.8M | 1% |
| 31 | SHARKNINJA INC | 88,000 | $13.4M | 0.9% |
| 32 | NFLXNETFLIX INC. | 180,000 | $12.9M | 0.8% |
| 33 | CWCURTISS WRIGHT CORP | 16,000 | $12.1M | 0.8% |
| 34 | KYMRKYMERA THERAPEUTICS INC | 104,000 | $11.9M | 0.8% |
| 35 | STUBSTUBHUB HLDGS INCCALL | 9,000 | $11.6M | 0.8% |
| 36 | SITMSITIME CORP | 15,000 | $11.2M | 0.7% |
| 37 | TWSTTWIST BIOSCIENCE CORP | 108,000 | $11.1M | 0.7% |
| 38 | REALTHE REALREAL INC | 940,000 | $11.1M | 0.7% |
| 39 | COGTCOGENT BIOSCIENCES INC | 272,000 | $10.5M | 0.7% |
| 40 | BWXTBWX TECHNOLOGIES INC | 54,000 | $10.5M | 0.7% |
| 41 | AMZNAMAZON COM INC | 44,000 | $10.5M | 0.7% |
| 42 | BBB FOODS INC | 250,000 | $10.4M | 0.7% |
| 43 | AXGNAXOGEN INC | 221,000 | $10.2M | 0.7% |
| 44 | NOKNOKIA CORP | 750,000 | $10.0M | 0.7% |
| 45 | ORKAORUKA THERAPEUTICS INC | 100,000 | $9.5M | 0.6% |
| 46 | TTMITTM TECHNOLOGIES INC | 50,000 | $9.4M | 0.6% |
| 47 | CRLCHARLES RIV LABS INTL INC | 38,000 | $8.6M | 0.6% |
| 48 | ALKERMES PLCCALL | 1,600 | $8.4M | 0.6% |
| 49 | ACMRACM RESH INC | 63,000 | $8.0M | 0.5% |
| 50 | ROIVANT SCIENCES LTD | 217,000 | $7.7M | 0.5% |
| 51 | MELIMERCADOLIBRE INC | 4,510 | $7.7M | 0.5% |
| 52 | APPFAPPFOLIO INC | 47,500 | $7.6M | 0.5% |
| 53 | PTGXPROTAGONIST THERAPEUTICS INC | 62,100 | $7.6M | 0.5% |
| 54 | RDDTREDDIT INC | 43,000 | $7.5M | 0.5% |
| 55 | SMTCSEMTECH CORP | 46,000 | $7.4M | 0.5% |
| 56 | ECHOECHOSTAR CORPCALL | 709 | $7.2M | 0.5% |
| 57 | FIVEFIVE BELOW INC | 40,000 | $7.2M | 0.5% |
| 58 | FERGFERGUSON ENTERPRISES INC | 29,300 | $7.0M | 0.5% |
| 59 | ENPHENPHASE ENERGY INCCALL | 1,200 | $5.9M | 0.4% |
| 60 | DFTXDEFINIUM THERAPEUTICS INC | 122,000 | $5.7M | 0.4% |
| 61 | IMNMIMMUNOME INC | 262,900 | $5.6M | 0.4% |
| 62 | HUTHUT 8 CORP | 44,500 | $5.1M | 0.3% |
| 63 | WRBYWARBY PARKER INC | 150,000 | $4.6M | 0.3% |
| 64 | JATT II ACQUISITION CORP | 400,000 | $4.5M | 0.3% |
| 65 | PRAXPRAXIS PRECISION MEDICINES I | 12,900 | $4.3M | 0.3% |
| 66 | LASRNLIGHT INC | 55,000 | $3.8M | 0.3% |
| 67 | ABVXABIVAX SA | 27,000 | $3.6M | 0.2% |
| 68 | CRWVCOREWEAVE INCCALL | 350 | $3.5M | 0.2% |
| 69 | TEVATEVA PHARMACEUTICAL INDS LTDCALL | 1,000 | $3.4M | 0.2% |
| 70 | ALKERMES PLC | 55,571 | $2.9M | 0.2% |
| 71 | CRWDCROWDSTRIKE HLDGS INC | 3,800 | $2.9M | 0.2% |
| 72 | TARSTARSUS PHARMACEUTICALS INC | 40,000 | $2.5M | 0.2% |
| 73 | KRYSKRYSTAL BIOTECH INC | 6,000 | $2.2M | 0.1% |
| 74 | VCELVERICEL CORP | 34,000 | $1.5M | 0.1% |
| 75 | MANEVERADERMICS INC | 12,000 | $1.5M | 0.1% |
| 76 | KINIKSA PHARMACEUTICALS INTL | 23,000 | $1.5M | 0.1% |
| 77 | CLFCLEVELAND-CLIFFS INC NEWCALL | 1,500 | $1.4M | 0.1% |
| 78 | SGSWEETGREEN INC | 120,000 | $1.1M | 0.1% |
| 79 | KEELKEEL INFRASTRUCTURE CORPCALL | 1,500 | $861,000 | 0.1% |
| 80 | SNDKSANDISK CORP | 303 | $688,940 | 0% |
| 81 | STUBSTUBHUB HLDGS INC | 50,000 | $643,500 | 0% |
Source: SEC Form 13F-HR, reporting period 2026-06-30. Values are the manager's filed June-30-style quarter-end marks, not live prices. Research, not investment advice.