Atika Capital Management LLC
Reported holdings as of Q2 2026, from 31 quarterly filings.
Holdings
| Security | Ticker | Value | Shares | Weight | Weight change | Held | Change |
|---|---|---|---|---|---|---|---|
| VERTIV HOLDINGS CO | VRT | $223.0M | 666,100 | -6.30pp | 13q | HELD | |
| INVESCO QQQ TR OPT | QQQ | $122.2M | options only | - | new | OPTIONS | |
| SPDR SERIES TRUST OPT | XBI | $89.0M | options only | -0.93pp | 3q | OPTIONS | |
| SEAGATE TECHNOLOGY HLDNGS PL | STX | $77.1M | 79,865 | +2.43pp | 4q | +49.3%+$25.4M | |
| AMAZON COM INC OPT | AMZN | $63.4M | 44,000 | +3.02pp | 14q | +0.7%+$432.3K | |
| GE VERNOVA INC OPT | GEV | $58.7M | options only | - | new | OPTIONS | |
| ADVANCED MICRO DEVICES INC | AMD | $55.5M | 95,500 | - | new | NEW | |
| ELI LILLY & CO | LLY | $49.3M | 41,100 | -1.51pp | 13q | HELD | |
| ECHOSTAR CORP OPT | ECHO | $40.8M | 331,400 | -2.32pp | 7q | +82.1%+$18.4M | |
| INTEL CORP | INTC | $36.9M | 264,000 | +1.87pp | 2q | HELD | |
| MICRON TECHNOLOGY INC OPT | MU | $34.6M | options only | - | new | OPTIONS | |
| VANECK ETF TRUST OPT | SMH | $33.5M | options only | -1.27pp | 2q | OPTIONS | |
| GUARDANT HEALTH INC | GH | $27.2M | 181,000 | +0.73pp | 6q | +98.9%+$13.5M | |
| ISHARES TR OPT | IGV | $24.6M | options only | - | new | OPTIONS | |
| CIENA CORP | CIEN | $23.9M | 48,768 | -0.56pp | 4q | +11.7%+$2.5M | |
| INTUITIVE SURGICAL INC | ISRG | $22.8M | 57,216 | -1.82pp | 16q | HELD | |
| BRITISH AMERN TOB PLC OPT | BTI | $20.4M | options only | - | new | OPTIONS | |
| ISHARES BITCOIN TRUST ETF OPT | IBIT | $20.0M | options only | - | new | OPTIONS | |
| TEVA PHARMACEUTICAL INDS LTD OPT | TEVA | $18.3M | 440,000 | -0.60pp | 4q | -7.8%-$1.5M | |
| VISHAY PRECISION GROUP INC | VPG | $17.7M | 118,000 | - | new | NEW | |
| MARVELL TECHNOLOGY INC | MRVL | $17.3M | 58,000 | - | new | NEW | |
| ROCKET LAB CORP | RKLB | $17.2M | 169,000 | +0.44pp | 3q | +96.5%+$8.4M | |
| WESTERN DIGITAL CORP | WDC | $16.9M | 26,477 | -0.17pp | 2q | -29.8%-$7.2M | |
| REVOLUTION MEDICINES INC | RVMD | $16.5M | 88,000 | - | new | NEW | |
| ASCENDIS PHARMA A/S | ASND | $16.3M | 61,000 | - | new | NEW | |
| DIANTHUS THERAPEUTICS INC | DNTH | $16.1M | 165,000 | -0.30pp | 3q | +28.1%+$3.5M | |
| ROUNDHILL ETF TRUST OPT | $15.5M | options only | - | new | OPTIONS | ||
| AXSOME THERAPEUTICS INC | AXSM | $15.4M | 63,000 | - | new | NEW | |
| MASTEC INC | MTZ | $14.8M | 35,500 | -1.36pp | 5q | -38.4%-$9.2M | |
| SHARKNINJA INC | SN | $13.4M | 88,000 | - | new | NEW | |
| NETFLIX INC | NFLX | $12.9M | 180,000 | -3.32pp | 8q | HELD | |
| STUBHUB HLDGS INC OPT | STUB | $12.2M | 50,000 | - | new | NEW | |
| CURTISS WRIGHT CORP | CW | $12.1M | 16,000 | -0.31pp | 5q | +23.1%+$2.3M | |
| KYMERA THERAPEUTICS INC | KYMR | $11.9M | 104,000 | - | new | NEW | |
| ALKERMES PLC OPT | ALKS | $11.3M | 55,571 | - | new | NEW | |
| SITIME CORP | SITM | $11.2M | 15,000 | +0.09pp | 2q | +1.3%+$145.4K | |
| TWIST BIOSCIENCE CORP | TWST | $11.1M | 108,000 | - | new | NEW | |
| THE REALREAL INC | REAL | $11.1M | 940,000 | +0.21pp | 4q | +108.4%+$5.8M | |
| COGENT BIOSCIENCES INC | COGT | $10.5M | 272,000 | -0.73pp | 3q | -7.2%-$820.4K | |
| BWX TECHNOLOGIES INC | BWXT | $10.5M | 54,000 | -1.43pp | 17q | -34.6%-$5.6M | |
| BBB FOODS INC | TBBB | $10.4M | 250,000 | +0.26pp | 10q | +162.6%+$6.4M | |
| AXOGEN INC | AXGN | $10.2M | 221,000 | - | new | NEW | |
| NOKIA CORP | NOK | $10.0M | 750,000 | - | new | NEW | |
| ORUKA THERAPEUTICS INC | ORKA | $9.5M | 100,000 | -0.79pp | 2q | -56.5%-$12.4M | |
| TTM TECHNOLOGIES INC | TTMI | $9.4M | 50,000 | -0.52pp | 3q | -46.2%-$8.0M | |
| CHARLES RIV LABS INTL INC | CRL | $8.6M | 38,000 | - | new | NEW | |
| ACM RESH INC | ACMR | $8.0M | 63,000 | - | new | NEW | |
| ROIVANT SCIENCES LTD | ROIV | $7.7M | 217,000 | - | new | NEW | |
| MERCADOLIBRE INC | MELI | $7.7M | 4,510 | -0.48pp | 14q | HELD | |
| APPFOLIO INC | APPF | $7.6M | 47,500 | -0.44pp | 13q | HELD | |
| PROTAGONIST THERAPEUTICS INC | PTGX | $7.6M | 62,100 | -0.32pp | 4q | HELD | |
| REDDIT INC | RDDT | $7.5M | 43,000 | - | new | NEW | |
| SEMTECH CORP | SMTC | $7.4M | 46,000 | - | new | NEW | |
| FIVE BELOW INC | FIVE | $7.2M | 40,000 | -0.66pp | 4q | +1.3%+$93.5K | |
| FERGUSON ENTERPRISES INC | FERG | $7.0M | 29,300 | -0.40pp | 8q | HELD | |
| ENPHASE ENERGY INC OPT | ENPH | $5.9M | options only | - | new | OPTIONS | |
| DEFINIUM THERAPEUTICS INC | DFTX | $5.7M | 122,000 | - | new | NEW | |
| IMMUNOME INC | IMNM | $5.6M | 262,900 | -0.36pp | 3q | HELD | |
| HUT 8 CORP | HUT | $5.1M | 44,500 | +0.05pp | 2q | -9.7%-$554.1K | |
| WARBY PARKER INC | WRBY | $4.6M | 150,000 | -0.06pp | 3q | +11.1%+$455.1K | |
| JATT II ACQUISITION CORP | $4.5M | 400,000 | - | new | NEW | ||
| PRAXIS PRECISION MEDICINES I | PRAX | $4.3M | 12,900 | - | new | NEW | |
| NLIGHT INC | LASR | $3.8M | 55,000 | -0.22pp | 2q | -16.7%-$765.8K | |
| ABIVAX SA | ABVX | $3.6M | 27,000 | -0.17pp | 4q | -6.2%-$239.9K | |
| COREWEAVE INC OPT | CRWV | $3.5M | options only | - | new | OPTIONS | |
| CROWDSTRIKE HLDGS INC | CRWD | $2.9M | 3,800 | - | new | NEW | |
| TARSUS PHARMACEUTICALS INC | TARS | $2.5M | 40,000 | - | new | NEW | |
| KRYSTAL BIOTECH INC | KRYS | $2.2M | 6,000 | -0.20pp | 2q | -43.5%-$1.7M | |
| VERICEL CORP | VCEL | $1.5M | 34,000 | - | new | NEW | |
| VERADERMICS INC | MANE | $1.5M | 12,000 | - | new | NEW | |
| KINIKSA PHARMACEUTICALS INTL | KNSA | $1.5M | 23,000 | - | new | NEW | |
| CLEVELAND-CLIFFS INC NEW OPT | CLF | $1.4M | options only | - | new | OPTIONS | |
| SWEETGREEN INC | SG | $1.1M | 120,000 | - | new | NEW | |
| KEEL INFRASTRUCTURE CORP OPT | KEEL | $861.0K | options only | - | new | OPTIONS | |
| SANDISK CORP | SNDK | $688.9K | 303 | - | new | NEW |
By sector
Industry comes from the SIC code on each company's own SEC filings, which is self-reported and sometimes out of date. Derivative exposure is counted with the shares. Securities the SEC assigns no industry - funds, trusts, foreign issues - are shown as not classified rather than dropped.
| Sector | Value | Share |
|---|---|---|
| Semiconductors & Electronics | $528.7M | 34.7% |
| Biotech & Pharma | $238.6M | 15.7% |
| Funds & ETFs | $122.2M | 8.0% |
| Computer Hardware | $94.7M | 6.2% |
| Retail & Consumer | $93.1M | 6.1% |
| Telecom & Media | $65.9M | 4.3% |
| Medical Devices | $37.5M | 2.5% |
| Industrials | $30.6M | 2.0% |
| Healthcare Services | $27.2M | 1.8% |
| Other sectors | $115.8M | 7.6% |
| Not classified | $167.2M | 11.0% |
Quarter by quarter
| Quarter | Value | Positions | New | Added | Trimmed | Exited | Top 10 | Days to file |
|---|---|---|---|---|---|---|---|---|
| Q2 2026 | $1.5B | 75 | 39 | 13 | 11 | 20 | 53.6% | 44 |
| Q1 2026 | $796.4M | 56 | 16 | 11 | 23 | 34 | 56.8% | 44 |
| Q4 2025 | $949.8M | 74 | 33 | 15 | 22 | 40 | 49.1% | 44 |
| Q3 2025 | $1.2B | 81 | 31 | 20 | 18 | 11 | 42.4% | 44 |
| Q2 2025 | $1,000.0M | 61 | 18 | 25 | 15 | 16 | 50.2% | 44 |
| Q1 2025 | $711.1M | 59 | 15 | 21 | 17 | 39 | 46.7% | 44 |
| Q4 2024 | $941.4M | 83 | 31 | 9 | 32 | 30 | 38.2% | 44 |
| Q3 2024 | $975.4M | 82 | 26 | 24 | 20 | 33 | 40.0% | 44 |
| Q2 2024 | $1.0B | 89 | 32 | 17 | 32 | 30 | 40.3% | 44 |
| Q1 2024 | $1.0B | 87 | 38 | 22 | 21 | 24 | 33.5% | 44 |
| Q4 2023 | $746.8M | 73 | 23 | 15 | 33 | 23 | 33.0% | 44 |
| Q3 2023 | $761.9M | 73 | 25 | 15 | 25 | 30 | 30.5% | 44 |
| Q2 2023 | $999.0M | 78 | 28 | 22 | 21 | 25 | 39.4% | 42 |
| Q1 2023 | $677.1M | 75 | 30 | 11 | 29 | 18 | 40.2% | 42 |
| Q4 2022 | $695.5M | 63 | 21 | 7 | 32 | 40 | 42.7% | 44 |
| Q3 2022 | $1.2B | 82 | 35 | 24 | 16 | 26 | 33.1% | 45 |
| Q2 2022 | $889.6M | 73 | 28 | 15 | 23 | 21 | 39.2% | 43 |
| Q1 2022 | $1.2B | 66 | 21 | 15 | 23 | 40 | 38.5% | 43 |
| Q4 2021 | $1.4B | 85 | 26 | 22 | 29 | 50 | 28.6% | 42 |
| Q3 2021 | $1.7B | 109 | 44 | 33 | 21 | 26 | 32.1% | 43 |
| Q2 2021 | $1.3B | 91 | 30 | 18 | 27 | 26 | 29.6% | 43 |
| Q1 2021 | $1.2B | 87 | 20 | 11 | 50 | 34 | 28.8% | 44 |
| Q4 2020 | $1.3B | 101 | 42 | 26 | 28 | 40 | 25.0% | 47 |
| Q3 2020 | $1.2B | 99 | 30 | 25 | 27 | 18 | 35.6% | 44 |
| Q2 2020 | $773.8M | 87 | 33 | 21 | 29 | 25 | 31.3% | 44 |
| Q1 2020 | $521.8M | 79 | 32 | 22 | 22 | 27 | 40.4% | 44 |
| Q4 2019 | $517.9M | 74 | 22 | 21 | 24 | 15 | 30.3% | 45 |
| Q3 2019 | $475.0M | 67 | 12 | 25 | 24 | 20 | 32.0% | 45 |
| Q2 2019 | $509.1M | 75 | 25 | 17 | 20 | 21 | 30.6% | 43 |
| Q1 2019 | $492.2M | 71 | 23 | 20 | 14 | 14 | 34.7% | 43 |
| Q4 2018 | $339.7M | 62 | 0 | 0 | 0 | 0 | 36.9% | 45 |
Rows marked UNVERIFIED ID, PLACEHOLDER ID, TICKER AS ID or NON-CUSIP ID carry an identifier that is not a valid CUSIP. They are shown because the filer reported that money, but treat the security named with caution - hover the chip for what is wrong with it, and see the methodology.
Held counts consecutive filings in which this manager reported the position, and can reach further back than the quarters listed above: the tabs begin at Q4 2018 because earlier coverage is too sparse to describe a market, but tenure is counted over every filing we hold, some reaching to 2007. A position sold and later rebought starts again from one.
Weight change is the shift in this position's share of the whole book, in percentage points. It is the more useful column: when money flows into or out of a broad fund, almost every holding is bought or sold at once, so added and trimmed largely track flows. A weight that rose while the book shrank is a decision. Both compare with the previous quarter this filer reported, not the previous calendar quarter.