Q4 2025 · 13F-HR
Atika Capital Management LLCholdings as filed
Filed 2026-02-13 · accession 0001214659-26-001658
$949.8M
Reported value
77
Positions
2025-12-31
Period end
The Brief · Atika Capital Management LLC · Q4 2025
AI · grounded in 13F
Atika Capital Management LLC established a new position in XBI valued at $117.4M. The fund closed its position in MSFT, reducing exposure by $85.5M, and exited holdings in SPOT and MLM for $43.9M and $43.2M respectively. Other notable activity includes new positions in IWM and MDGL, alongside a 221.4% increase in shares of TEVA.
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 78464A870 | XBI | SPDR SERIES TRUST | $117.4M | 12.4% | 9,625 | PUT | SOLE |
| 92537N108 | VRT | VERTIV HOLDINGS CO | $103.1M | 10.8% | 636,100 | Common | SOLE |
| 532457108 | LLY | ELI LILLY & CO | $44.2M | 4.65% | 41,100 | Common | SOLE |
| 278768106 | SATS | ECHOSTAR CORP | $43.3M | 4.56% | 3,983 | CALL | SOLE |
| 46120E602 | ISRG | INTUITIVE SURGICAL INC | $32.4M | 3.41% | 57,216 | Common | SOLE |
| 464287655 | IWM | ISHARES TR | $22.4M | 2.36% | 910 | PUT | SOLE |
| 881624209 | TEVA | TEVA PHARMACEUTICAL INDS | $22.4M | 2.36% | 717,000 | Common | SOLE |
| 82509L107 | SHOP | SHOPIFY INC | $20.0M | 2.10% | 124,000 | Common | SOLE |
| 558868105 | MDGL | MADRIGAL PHARMACEUTICALS | $19.8M | 2.08% | 34,000 | Common | SOLE |
| 05605H100 | BWXT | BWX TECHNOLOGIES INC | $18.8M | 1.98% | 108,900 | Common | SOLE |
| 023135106 | AMZN | AMAZON COM INC | $18.5M | 1.94% | 80,000 | Common | SOLE |
| 19240Q201 | COGT | COGENT BIOSCIENCES INC | $18.0M | 1.89% | 506,000 | Common | SOLE |
| 64110L106 | NFLX | NETFLIX INC | $16.9M | 1.78% | 180,000 | Common | SOLE |
| 87422Q109 | TLN | TALEN ENERGY CORP | $15.8M | 1.66% | 42,100 | Common | SOLE |
| G7997R103 | STX | SEAGATE TECHNOLOGY HLDNGS | $14.3M | 1.50% | 51,907 | Common | SOLE |
| 171779309 | CIEN | CIENA CORP | $14.0M | 1.48% | 60,000 | Common | SOLE |
| 278768106 | SATS | ECHOSTAR CORP | $13.6M | 1.43% | 124,806 | Common | SOLE |
| 88160R101 | TSLA | TESLA INC | $13.5M | 1.42% | 30,000 | Common | SOLE |
| 457669307 | INSM | INSMED INC | $13.4M | 1.41% | 77,200 | Common | SOLE |
| 02079K107 | GOOG | ALPHABET INC | $13.2M | 1.39% | 42,200 | Common | SOLE |
| 880881107 | 430 | TERNS PHARMACEUTICALS INC | $13.0M | 1.37% | 321,165 | Common | SOLE |
| 576323109 | MTZ | MASTEC INC | $12.2M | 1.28% | 55,998 | Common | SOLE |
| 58733R102 | MELI | MERCADOLIBRE INC | $12.0M | 1.26% | 5,947 | Common | SOLE |
| 40131M109 | GH | GUARDANT HEALTH INC | $11.0M | 1.16% | 108,000 | Common | SOLE |
| 18915M107 | NET | CLOUDFLARE INC | $10.8M | 1.14% | 54,900 | Common | SOLE |
| 33829M101 | FIVE | FIVE BELOW INC | $10.6M | 1.11% | 56,200 | Common | SOLE |
| 25809K105 | DASH | DOORDASH INC | $10.4M | 1.10% | 46,000 | Common | SOLE |
| 03783C100 | APPF | APPFOLIO INC | $10.4M | 1.09% | 44,500 | Common | SOLE |
| 05464T104 | AXSM | AXSOME THERAPEUTICS INC | $10.1M | 1.07% | 55,500 | Common | SOLE |
| 60937P106 | MDB | MONGODB INC | $9.4M | 0.99% | 22,326 | Common | SOLE |
| 881624209 | TEVA | TEVA PHARMACEUTICAL INDS | $9.4M | 0.99% | 3,000 | CALL | SOLE |
| 88339P101 | REAL | THE REALREAL INC | $8.9M | 0.94% | 565,000 | Common | SOLE |
| 422806109 | HEI | HEICO CORP NEW | $8.5M | 0.90% | 26,300 | Common | SOLE |
| 52567D107 | LMND | LEMONADE INC | $8.1M | 0.85% | 113,917 | Common | SOLE |
| 82846H405 | QXO | QXO INC | $8.1M | 0.85% | 420,000 | Common | SOLE |
| 142339100 | CSL | CARLISLE COS INC | $8.1M | 0.85% | 25,300 | Common | SOLE |
| 369604301 | GE | GE AEROSPACE | $8.0M | 0.84% | 25,948 | Common | SOLE |
| 770700102 | HOOD | ROBINHOOD MKTS INC | $7.9M | 0.83% | 700 | PUT | SOLE |
| 74366E102 | PTGX | PROTAGONIST THERAPEUTICS | $7.5M | 0.79% | 86,000 | Common | SOLE |
| 29082A107 | EMBJ | EMBRAER S.A. | $7.5M | 0.79% | 115,930 | Common | SOLE |
| 46438F101 | IBIT | ISHARES BITCOIN TRUST ETF | $7.4M | 0.78% | 1,500 | PUT | SOLE |
| 00370M103 | ABVX | ABIVAX SA | $7.4M | 0.78% | 55,000 | Common | SOLE |
| 45257U108 | IMNM | IMMUNOME INC | $7.2M | 0.76% | 334,341 | Common | SOLE |
| 87305R109 | TTMI | TTM TECHNOLOGIES INC | $7.0M | 0.74% | 101,473 | Common | SOLE |
| 77543R102 | ROKU | ROKU INC | $6.6M | 0.70% | 61,000 | Common | SOLE |
| 31488V107 | FERG | FERGUSON ENTERPRISES INC | $6.5M | 0.69% | 29,300 | Common | SOLE |
| 74967X103 | RH | RH | $6.3M | 0.66% | 35,000 | Common | SOLE |
| G8068L108 | SN | SHARKNINJA INC | $5.9M | 0.62% | 52,600 | Common | SOLE |
| 770700102 | HOOD | ROBINHOOD MKTS INC | $5.8M | 0.61% | 51,500 | Common | SOLE |
| 252828108 | DNTH | DIANTHUS THERAPEUTICS INC | $5.5M | 0.58% | 134,528 | Common | SOLE |
| 231561101 | CW | CURTISS WRIGHT CORP | $5.4M | 0.57% | 9,882 | Common | SOLE |
| 93403J106 | WRBY | WARBY PARKER INC | $5.4M | 0.57% | 248,971 | Common | SOLE |
| 58507V107 | MDLN | MEDLINE INC | $4.9M | 0.52% | 117,800 | Common | SOLE |
| 339750101 | FND | FLOOR & DECOR HLDGS INC | $4.9M | 0.51% | 800 | CALL | SOLE |
| 76954A103 | RIVN | RIVIAN AUTOMOTIVE INC | $4.8M | 0.50% | 2,420 | CALL | SOLE |
| G0896C103 | TBBB | BBB FOODS INC | $4.8M | 0.50% | 142,282 | Common | SOLE |
| 349381103 | FIGR | FIGURE TECHNOLOGY SOLUTIO | $4.6M | 0.48% | 111,447 | Common | SOLE |
| 070830104 | BBWI | BATH & BODY WORKS INC | $4.5M | 0.48% | 225,000 | Common | SOLE |
| 464287234 | EEM | ISHARES TR | $4.5M | 0.47% | 816 | CALL | SOLE |
| 04351P101 | ASNDUSD | ASCENDIS PHARMA A/S | $4.4M | 0.46% | 20,642 | Common | SOLE |
| 773121108 | RKLB | ROCKET LAB CORP | $4.3M | 0.46% | 62,115 | Common | SOLE |
| 29415C101 | EOSE | EOS ENERGY ENTERPRISES INC | $4.3M | 0.45% | 3,720 | CALL | SOLE |
| 98420N105 | XENE | XENON PHARMACEUTICALS INC | $4.1M | 0.44% | 92,506 | Common | SOLE |
| 02043Q107 | ALNY | ALNYLAM PHARMACEUTICALS INC | $4.1M | 0.43% | 10,339 | Common | SOLE |
| 23306J309 | DBVT | DBV TECHNOLOGIES S A | $4.0M | 0.42% | 206,881 | Common | SOLE |
| G52694109 | KNSA | KINIKSA PHARMACEUTICALS | $3.9M | 0.41% | 93,970 | Common | SOLE |
| 462222100 | IONS | IONIS PHARMACEUTICALS INC | $3.8M | 0.40% | 47,488 | Common | SOLE |
| 002896207 | ANF | ABERCROMBIE & FITCH CO | $3.7M | 0.38% | 29,000 | Common | SOLE |
| 75382E208 | RAPT | RAPT THERAPEUTICS INC | $3.2M | 0.34% | 94,245 | Common | SOLE |
| 03823U102 | AAOI | APPLIED OPTOELECTRONICS INC | $3.1M | 0.32% | 87,657 | Common | SOLE |
| 77311W101 | RKT | ROCKET COS INC | $2.5M | 0.26% | 130,000 | Common | SOLE |
| 60770K107 | MRNA | MODERNA INC | $2.2M | 0.24% | 760 | PUT | SOLE |
| 91332U101 | U | UNITY SOFTWARE INC | $2.2M | 0.23% | 500 | CALL | SOLE |
| 125141101 | CECO | CECO ENVIRONMENTAL CORP | $1.8M | 0.19% | 29,804 | Common | SOLE |
| 171757206 | CDTX | CIDARA THERAPEUTICS INC | $1.1M | 0.11% | 49 | CALL | SOLE |
| 184496107 | CLH | CLEAN HARBORS INC | $703,440 | 0.07% | 3,000 | Common | SOLE |
| 75734B100 | RDDT | REDDIT INC | $459,740 | 0.05% | 2,000 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.