# Atika Capital Management LLC

> Institutional holdings reported to the SEC as of Q2 2026 on Form 13F. CIK 1599731. Source: https://holderbook.com/funds/1599731-atika-capital-management-llc/

- Reported value: $1.5B
- Positions: 75
- Weight of the ten largest: 53.6%
- Filed: 2026-08-13

A 13F reports long US equity positions only. Short positions, bonds, foreign listings, private holdings and cash are not visible, so this is not the manager's whole book.

## Holdings

| Security | Ticker | Value | Shares | Weight | Quarters held |
|---|---|---|---|---|---|
| VERTIV HOLDINGS CO | [VRT](https://holderbook.com/stocks/VRT/) | $223.0M | 666,100 | 14.7% | 13 |
| INVESCO QQQ TR | [QQQ](https://holderbook.com/stocks/QQQ/) | $122.2M | 0 | 8.0% | 1 |
| SPDR SERIES TRUST | [XBI](https://holderbook.com/stocks/XBI/) | $89.0M | 0 | 5.9% | 3 |
| SEAGATE TECHNOLOGY HLDNGS PL | [STX](https://holderbook.com/stocks/STX/) | $77.1M | 79,865 | 5.1% | 4 |
| AMAZON COM INC | [AMZN](https://holderbook.com/stocks/AMZN/) | $63.4M | 44,000 | 4.2% | 14 |
| GE VERNOVA INC | [GEV](https://holderbook.com/stocks/GEV/) | $58.7M | 0 | 3.9% | 1 |
| ADVANCED MICRO DEVICES INC | [AMD](https://holderbook.com/stocks/AMD/) | $55.5M | 95,500 | 3.6% | 1 |
| ELI LILLY & CO | [LLY](https://holderbook.com/stocks/LLY/) | $49.3M | 41,100 | 3.2% | 13 |
| ECHOSTAR CORP | [ECHO](https://holderbook.com/stocks/ECHO/) | $40.8M | 331,400 | 2.7% | 7 |
| INTEL CORP | [INTC](https://holderbook.com/stocks/INTC/) | $36.9M | 264,000 | 2.4% | 2 |
| MICRON TECHNOLOGY INC | [MU](https://holderbook.com/stocks/MU/) | $34.6M | 0 | 2.3% | 1 |
| VANECK ETF TRUST | [SMH](https://holderbook.com/stocks/SMH/) | $33.5M | 0 | 2.2% | 2 |
| GUARDANT HEALTH INC | [GH](https://holderbook.com/stocks/GH/) | $27.2M | 181,000 | 1.8% | 6 |
| ISHARES TR | [IGV](https://holderbook.com/stocks/IGV/) | $24.6M | 0 | 1.6% | 1 |
| CIENA CORP | [CIEN](https://holderbook.com/stocks/CIEN/) | $23.9M | 48,768 | 1.6% | 4 |
| INTUITIVE SURGICAL INC | [ISRG](https://holderbook.com/stocks/ISRG/) | $22.8M | 57,216 | 1.5% | 16 |
| BRITISH AMERN TOB PLC | [BTI](https://holderbook.com/stocks/BTI/) | $20.4M | 0 | 1.3% | 1 |
| ISHARES BITCOIN TRUST ETF | [IBIT](https://holderbook.com/stocks/IBIT/) | $20.0M | 0 | 1.3% | 1 |
| TEVA PHARMACEUTICAL INDS LTD | [TEVA](https://holderbook.com/stocks/TEVA/) | $18.3M | 440,000 | 1.2% | 4 |
| VISHAY PRECISION GROUP INC | [VPG](https://holderbook.com/stocks/VPG/) | $17.7M | 118,000 | 1.2% | 1 |
| MARVELL TECHNOLOGY INC | [MRVL](https://holderbook.com/stocks/MRVL/) | $17.3M | 58,000 | 1.1% | 1 |
| ROCKET LAB CORP | [RKLB](https://holderbook.com/stocks/RKLB/) | $17.2M | 169,000 | 1.1% | 3 |
| WESTERN DIGITAL CORP | [WDC](https://holderbook.com/stocks/WDC/) | $16.9M | 26,477 | 1.1% | 2 |
| REVOLUTION MEDICINES INC | [RVMD](https://holderbook.com/stocks/RVMD/) | $16.5M | 88,000 | 1.1% | 1 |
| ASCENDIS PHARMA A/S | [ASND](https://holderbook.com/stocks/ASND/) | $16.3M | 61,000 | 1.1% | 1 |
| DIANTHUS THERAPEUTICS INC | [DNTH](https://holderbook.com/stocks/DNTH/) | $16.1M | 165,000 | 1.1% | 3 |
| ROUNDHILL ETF TRUST | - | $15.5M | 0 | 1.0% | 1 |
| AXSOME THERAPEUTICS INC | [AXSM](https://holderbook.com/stocks/AXSM/) | $15.4M | 63,000 | 1.0% | 1 |
| MASTEC INC | [MTZ](https://holderbook.com/stocks/MTZ/) | $14.8M | 35,500 | 1.0% | 5 |
| SHARKNINJA INC | [SN](https://holderbook.com/stocks/SN/) | $13.4M | 88,000 | 0.9% | 1 |
| NETFLIX INC | [NFLX](https://holderbook.com/stocks/NFLX/) | $12.9M | 180,000 | 0.8% | 8 |
| STUBHUB HLDGS INC | [STUB](https://holderbook.com/stocks/STUB/) | $12.2M | 50,000 | 0.8% | 1 |
| CURTISS WRIGHT CORP | [CW](https://holderbook.com/stocks/CW/) | $12.1M | 16,000 | 0.8% | 5 |
| KYMERA THERAPEUTICS INC | [KYMR](https://holderbook.com/stocks/KYMR/) | $11.9M | 104,000 | 0.8% | 1 |
| ALKERMES PLC | [ALKS](https://holderbook.com/stocks/ALKS/) | $11.3M | 55,571 | 0.7% | 1 |
| SITIME CORP | [SITM](https://holderbook.com/stocks/SITM/) | $11.2M | 15,000 | 0.7% | 2 |
| TWIST BIOSCIENCE CORP | [TWST](https://holderbook.com/stocks/TWST/) | $11.1M | 108,000 | 0.7% | 1 |
| THE REALREAL INC | [REAL](https://holderbook.com/stocks/REAL/) | $11.1M | 940,000 | 0.7% | 4 |
| COGENT BIOSCIENCES INC | [COGT](https://holderbook.com/stocks/COGT/) | $10.5M | 272,000 | 0.7% | 3 |
| BWX TECHNOLOGIES INC | [BWXT](https://holderbook.com/stocks/BWXT/) | $10.5M | 54,000 | 0.7% | 17 |
| BBB FOODS INC | [TBBB](https://holderbook.com/stocks/TBBB/) | $10.4M | 250,000 | 0.7% | 10 |
| AXOGEN INC | [AXGN](https://holderbook.com/stocks/AXGN/) | $10.2M | 221,000 | 0.7% | 1 |
| NOKIA CORP | [NOK](https://holderbook.com/stocks/NOK/) | $10.0M | 750,000 | 0.7% | 1 |
| ORUKA THERAPEUTICS INC | [ORKA](https://holderbook.com/stocks/ORKA/) | $9.5M | 100,000 | 0.6% | 2 |
| TTM TECHNOLOGIES INC | [TTMI](https://holderbook.com/stocks/TTMI/) | $9.4M | 50,000 | 0.6% | 3 |
| CHARLES RIV LABS INTL INC | [CRL](https://holderbook.com/stocks/CRL/) | $8.6M | 38,000 | 0.6% | 1 |
| ACM RESH INC | [ACMR](https://holderbook.com/stocks/ACMR/) | $8.0M | 63,000 | 0.5% | 1 |
| ROIVANT SCIENCES LTD | [ROIV](https://holderbook.com/stocks/ROIV/) | $7.7M | 217,000 | 0.5% | 1 |
| MERCADOLIBRE INC | [MELI](https://holderbook.com/stocks/MELI/) | $7.7M | 4,510 | 0.5% | 14 |
| APPFOLIO INC | [APPF](https://holderbook.com/stocks/APPF/) | $7.6M | 47,500 | 0.5% | 13 |
| PROTAGONIST THERAPEUTICS INC | [PTGX](https://holderbook.com/stocks/PTGX/) | $7.6M | 62,100 | 0.5% | 4 |
| REDDIT INC | [RDDT](https://holderbook.com/stocks/RDDT/) | $7.5M | 43,000 | 0.5% | 1 |
| SEMTECH CORP | [SMTC](https://holderbook.com/stocks/SMTC/) | $7.4M | 46,000 | 0.5% | 1 |
| FIVE BELOW INC | [FIVE](https://holderbook.com/stocks/FIVE/) | $7.2M | 40,000 | 0.5% | 4 |
| FERGUSON ENTERPRISES INC | [FERG](https://holderbook.com/stocks/FERG/) | $7.0M | 29,300 | 0.5% | 8 |
| ENPHASE ENERGY INC | [ENPH](https://holderbook.com/stocks/ENPH/) | $5.9M | 0 | 0.4% | 1 |
| DEFINIUM THERAPEUTICS INC | [DFTX](https://holderbook.com/stocks/DFTX/) | $5.7M | 122,000 | 0.4% | 1 |
| IMMUNOME INC | [IMNM](https://holderbook.com/stocks/IMNM/) | $5.6M | 262,900 | 0.4% | 3 |
| HUT 8 CORP | [HUT](https://holderbook.com/stocks/HUT/) | $5.1M | 44,500 | 0.3% | 2 |
| WARBY PARKER INC | [WRBY](https://holderbook.com/stocks/WRBY/) | $4.6M | 150,000 | 0.3% | 3 |
| JATT II ACQUISITION CORP | - | $4.5M | 400,000 | 0.3% | 1 |
| PRAXIS PRECISION MEDICINES I | [PRAX](https://holderbook.com/stocks/PRAX/) | $4.3M | 12,900 | 0.3% | 1 |
| NLIGHT INC | [LASR](https://holderbook.com/stocks/LASR/) | $3.8M | 55,000 | 0.3% | 2 |
| ABIVAX SA | [ABVX](https://holderbook.com/stocks/ABVX/) | $3.6M | 27,000 | 0.2% | 4 |
| COREWEAVE INC | [CRWV](https://holderbook.com/stocks/CRWV/) | $3.5M | 0 | 0.2% | 1 |
| CROWDSTRIKE HLDGS INC | [CRWD](https://holderbook.com/stocks/CRWD/) | $2.9M | 3,800 | 0.2% | 1 |
| TARSUS PHARMACEUTICALS INC | [TARS](https://holderbook.com/stocks/TARS/) | $2.5M | 40,000 | 0.2% | 1 |
| KRYSTAL BIOTECH INC | [KRYS](https://holderbook.com/stocks/KRYS/) | $2.2M | 6,000 | 0.1% | 2 |
| VERICEL CORP | [VCEL](https://holderbook.com/stocks/VCEL/) | $1.5M | 34,000 | 0.1% | 1 |
| VERADERMICS INC | [MANE](https://holderbook.com/stocks/MANE/) | $1.5M | 12,000 | 0.1% | 1 |
| KINIKSA PHARMACEUTICALS INTL | [KNSA](https://holderbook.com/stocks/KNSA/) | $1.5M | 23,000 | 0.1% | 1 |
| CLEVELAND-CLIFFS INC NEW | [CLF](https://holderbook.com/stocks/CLF/) | $1.4M | 0 | 0.1% | 1 |
| SWEETGREEN INC | [SG](https://holderbook.com/stocks/SG/) | $1.1M | 120,000 | 0.1% | 1 |
| KEEL INFRASTRUCTURE CORP | [KEEL](https://holderbook.com/stocks/KEEL/) | $861.0K | 0 | 0.1% | 1 |
| SANDISK CORP | [SNDK](https://holderbook.com/stocks/SNDK/) | $688.9K | 303 | 0.0% | 1 |

## What the disclosed book did

Not the fund's return. This is the change in value of the positions disclosed on Form 13F, had they been left untouched, against SPY over the same quarter ends.

| Quarter | Book | Market | Difference | Priced |
|---|---|---|---|---|
| Q2 2026 | +26.4% | +14.8% | +11.6% | 90% |
| Q1 2026 | +7.0% | -4.6% | +11.6% | 92% |
| Q4 2025 | +3.4% | +2.4% | +1.1% | 95% |
| Q3 2025 | +6.9% | +7.8% | -0.9% | 98% |
| Q2 2025 | +24.3% | +10.5% | +13.9% | 98% |
| Q1 2025 | -9.5% | -4.6% | -4.9% | 100% |
| Q4 2024 | -0.3% | +2.1% | -2.4% | 99% |
| Q3 2024 | +6.8% | +5.4% | +1.4% | 97% |

## Quarter by quarter

| Quarter | Value | Positions |
|---|---|---|
| Q2 2026 | $1.5B | 75 |
| Q1 2026 | $796.4M | 56 |
| Q4 2025 | $949.8M | 74 |
| Q3 2025 | $1.2B | 81 |
| Q2 2025 | $1,000.0M | 61 |
| Q1 2025 | $711.1M | 59 |
| Q4 2024 | $941.4M | 83 |
| Q3 2024 | $975.4M | 82 |
| Q2 2024 | $1.0B | 89 |
| Q1 2024 | $1.0B | 87 |
| Q4 2023 | $746.8M | 73 |
| Q3 2023 | $761.9M | 73 |