Atika Capital Management LLC
In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 14, 2025), Atika Capital Management LLC reported 53 stock positions worth $651.3 million. Its top holding was Amazon.com (AMZN) at 9.2% of the portfolio, followed by Microsoft (MSFT, 6.2%) and Vertiv Class A (VRT, 5.4%). Compared with Q4 2024, it opened 11 new positions, sold out of 31, added to 21 and reduced 18. The biggest buy was Amazon.com (AMZN, shares +74%) and the biggest sale an exit from United Therapeutics (UTHR).
- Most Recent 13F
- Q2 2026
- Location
- NEW YORK, NY
- CIK
- 0001599731
- Portfolio Value
- $651.3M (Q1 2025)
- SEC Filing
- 0001214659-25-007540 ↗ filed May 14, 2025
Holdings Value
Holdings 53 stocks · $651.3M
| AMZN Amazon.com Inc. | 9.15% | 313,249 | $59.6M | Add +73.8% |
| MSFT Microsoft Corp. | 6.20% | 107,500 | $40.4M | No change |
| VRT Vertiv Holdings Co. Class A | 5.40% | 487,100 | $35.2M | Add +38.0% |
| SPOT Spotify Technology SA | 5.22% | 61,800 | $34.0M | Add +48.6% |
| LLY Eli Lilly & Co. | 4.20% | 33,100 | $27.3M | Add +1.4% |
| ISRG Intuitive Surgical Inc. | 4.19% | 55,100 | $27.3M | Add +2.8% |
| MLM Martin Marietta Materials | 4.08% | 55,633 | $26.6M | Add +18.1% |
| GKOS Glaukos Corp. | 3.98% | 263,500 | $25.9M | Add +10.0% |
| INSP Inspire Medical Systems Inc. | 3.93% | 160,600 | $25.6M | Add +1.9% |
| ANET Arista Networks Inc. | 2.55% | 213,988 | $16.6M | Add +2.1% |
| MELI MercadoLibre Inc. | 2.37% | 7,929 | $15.5M | Add +2.3% |
| DASH DoorDash Inc. Class A | 2.32% | 82,785 | $15.1M | Add +3.0% |
| NFLX Netflix Inc. | 2.32% | 16,200 | $15.1M | Add +136.5% |
| CYBR Cyberark Software Ltd./Israel | 2.22% | 42,700 | $14.4M | Reduce -6.2% |
| TLN Talen Energy Corp. | 2.21% | 72,160 | $14.4M | Reduce -16.1% |
| VST Vistra Corp. | 2.09% | 116,000 | $13.6M | Add +57.8% |
| VRNA Verona Pharma Ltd. | 2.03% | 208,134 | $13.2M | Reduce -1.8% |
| RXST Rxsight Inc. | 1.99% | 512,773 | $12.9M | Add +25.5% |
| GEV GE Vernova Inc. | 1.76% | 37,450 | $11.4M | Reduce -7.4% |
| META Meta Platforms Inc. Class A | 1.68% | 19,001 | $11.0M | Reduce -12.8% |
| BWXT BWX Technologies Inc. | 1.63% | 107,400 | $10.6M | No change |
| NTRA Natera Inc. | 1.56% | 71,663 | $10.1M | Reduce -0.1% |
| APPF Appfolio Inc. Class A | 1.50% | 44,500 | $9.8M | Reduce -22.3% |
| GE General Electric filed as GE AEROSPACE | 1.49% | 48,500 | $9.7M | Reduce -12.1% |
| AXSM Axsome Therapeutics Inc. | 1.32% | 73,700 | $8.6M | Add +235.0% |
| CEG Constellation Energy | 1.28% | 41,300 | $8.3M | Reduce -12.9% |
| ADBE Adobe Inc. | 1.26% | 21,400 | $8.2M | Add +18.9% |
| TARS Tarsus Pharmaceuticals Inc. | 1.14% | 144,400 | $7.4M | Reduce -18.5% |
| INSM Insmed Inc. | 1.12% | 96,000 | $7.3M | New |
| SPNT Siriuspoint Ltd. | 1.11% | 420,000 | $7.3M | New |
| DUOL Duolingo | 1.11% | 23,300 | $7.2M | Add +33.9% |
| SLNO Soleno Therapeutics Inc. | 1.10% | 100,600 | $7.2M | Add +42.3% |
| EMBJ Embraer SA-Spon ADR | 1.06% | 149,100 | $6.9M | Add +9.2% |
| TEVA Teva Pharmaceutical-SP ADR | 1.03% | 436,900 | $6.7M | New |
| HOOD Robinhood Markets Inc. Class A | 0.91% | 143,000 | $6.0M | New |
| NVDA Nvidia Corp. | 0.87% | 52,000 | $5.6M | Add +11.8% |
| TW Tradeweb Markets Inc. Class A | 0.85% | 37,256 | $5.5M | Reduce -23.8% |
| ASND Ascendis Pharma A/S | 0.84% | 35,200 | $5.5M | New |
| ECHO Echostar Corp. Class A | 0.80% | 203,300 | $5.2M | Add +7.4% |
| SHW The Sherwin-Williams Co. | 0.78% | 14,581 | $5.1M | Reduce -28.5% |
| ROKU Roku Inc. | 0.78% | 72,200 | $5.1M | New |
| TBBB BBB Foods Inc. Class A | 0.75% | 182,827 | $4.9M | Reduce -17.2% |
| TKO Tko Group Holdings Inc. | 0.73% | 31,300 | $4.8M | New |
| SHOP Shopify Inc. Class A | 0.73% | 49,767 | $4.8M | Reduce -18.4% |
| FERG Ferguson Enterprises Inc. | 0.72% | 29,300 | $4.7M | No change |
| CHKP Check Point Software Tech | 0.70% | 20,000 | $4.6M | New |
| GAP The Gap Inc. | 0.68% | 213,700 | $4.4M | Reduce -55.8% |
| LNTH Lantheus Holdings Inc. | 0.68% | 45,100 | $4.4M | Reduce -21.0% |
| NET Cloudflare Inc. Class A | 0.62% | 36,000 | $4.1M | Reduce -49.9% |
| GH Guardant Health Inc. | 0.56% | 85,500 | $3.6M | New |
| VMC Vulcan Materials Co. | 0.17% | 4,800 | $1.1M | New |
| XENE Xenon Pharmaceuticals Inc. | 0.12% | 24,000 | $805K | Reduce -66.9% |
| SFM Sprouts Farmers Market Inc. | 0.11% | 4,675 | $714K | New |
Options reported separately and not counted above: IWM calls ($29.9M), TSLA puts ($7.8M), LNTH puts ($7.3M), SLNO calls ($4.6M), MU calls ($3.5M), DOCS calls ($2.9M), WBA puts ($1.7M), RXST calls ($1.3M), CLS calls ($788K).
Portfolio Sells Q4 2024 → Q1 2025
| UTHR United Therapeutics Corp. | Sold out | 0.00% | −1.42 |
| GLNG Golar LNG Ltd. | Sold out | 0.00% | −1.09 |
| REAL The Realreal Inc. | Sold out | 0.00% | −1.06 |
| TSM Taiwan Semiconductor-SP ADR | Sold out | 0.00% | −0.99 |
| BSX Boston Scientific Corp. | Sold out | 0.00% | −0.99 |
| FRPT Freshpet Inc. | Sold out | 0.00% | −0.95 |
| MTZ Mastec Inc. | Sold out | 0.00% | −0.92 |
| TOST Toast Inc. Class A | Sold out | 0.00% | −0.91 |
| SG Sweetgreen Inc. Class A | Sold out | 0.00% | −0.90 |
| MRVL Marvell Technology Inc. | Sold out | 0.00% | −0.87 |
| NBIX Neurocrine Biosciences Inc. | Sold out | 0.00% | −0.85 |
| GTLB Gitlab Inc. Class A | Sold out | 0.00% | −0.85 |
| CRM Salesforce Inc. | Sold out | 0.00% | −0.84 |
| BECN Beacon Roofing Supply Inc. | Sold out | 0.00% | −0.82 |
| LNG Cheniere Energy Inc. | Sold out | 0.00% | −0.81 |
| GAP The Gap Inc. | Reduce -55.8% | 0.68% | −0.80 |
| ITCI Intra-Cellular Therapies Inc. | Sold out | 0.00% | −0.79 |
| MASI Masimo Corp. | Sold out | 0.00% | −0.79 |
| TTD Trade Desk Inc./the Class A | Sold out | 0.00% | −0.78 |
| PGNY Progyny Inc. | Sold out | 0.00% | −0.74 |
| KYMR Kymera Therapeutics Inc. | Sold out | 0.00% | −0.71 |
| GTLS Chart Industries Inc. | Sold out | 0.00% | −0.68 |
| AFRM Affirm Holdings Inc. | Sold out | 0.00% | −0.64 |
| CAVA Cava Group Inc. | Sold out | 0.00% | −0.61 |
| FSLR First Solar Inc. | Sold out | 0.00% | −0.57 |
| HEI.A Heico Corp. Class A | Sold out | 0.00% | −0.56 |
| OSCR Oscar Health Inc. Class A | Sold out | 0.00% | −0.56 |
| ARM Arm Holdings PLC-ADR | Sold out | 0.00% | −0.45 |
| ALAB Astera Labs Inc. | Sold out | 0.00% | −0.42 |
| NET Cloudflare Inc. Class A | Reduce -49.9% | 0.62% | −0.38 |
| APPF Appfolio Inc. Class A | Reduce -22.3% | 1.50% | −0.33 |
| WRBY Warby Parker Inc. Class A | Sold out | 0.00% | −0.32 |
| XENE Xenon Pharmaceuticals Inc. | Reduce -66.9% | 0.12% | −0.24 |
| TARS Tarsus Pharmaceuticals Inc. | Reduce -18.5% | 1.14% | −0.13 |
| SHW The Sherwin-Williams Co. | Reduce -28.5% | 0.78% | −0.12 |
| SHOP Shopify Inc. Class A | Reduce -18.4% | 0.73% | −0.11 |
| ABVX Abivax SA-ADR | Sold out | 0.00% | −0.10 |
| CEG Constellation Energy | Reduce -12.9% | 1.28% | −0.09 |
| DRUG Bright Minds Biosciences Inc. | Sold out | 0.00% | −0.07 |
| TBBB BBB Foods Inc. Class A | Reduce -17.2% | 0.75% | −0.06 |
| TLN Talen Energy Corp. | Reduce -16.1% | 2.21% | −0.03 |
| LNTH Lantheus Holdings Inc. | Reduce -21.0% | 0.68% | +0.01 |
| TW Tradeweb Markets Inc. Class A | Reduce -23.8% | 0.85% | +0.02 |
| META Meta Platforms Inc. Class A | Reduce -12.8% | 1.68% | +0.03 |
| GEV GE Vernova Inc. | Reduce -7.4% | 1.76% | +0.03 |
| NTRA Natera Inc. | Reduce -0.1% | 1.56% | +0.09 |
| CYBR Cyberark Software Ltd./Israel | Reduce -6.2% | 2.22% | +0.25 |
| GE General Electric | Reduce -12.1% | 1.49% | +0.30 |
| VRNA Verona Pharma Ltd. | Reduce -1.8% | 2.03% | +0.75 |
Portfolio Buys Q4 2024 → Q1 2025
| AMZN Amazon.com Inc. | Add +73.8% | 9.15% | +4.03 |
| SPOT Spotify Technology SA | Add +48.6% | 5.22% | +2.81 |
| NFLX Netflix Inc. | Add +136.5% | 2.32% | +1.53 |
| INSM Insmed Inc. | New | 1.12% | +1.12 |
| SPNT Siriuspoint Ltd. | New | 1.11% | +1.11 |
| AXSM Axsome Therapeutics Inc. | Add +235.0% | 1.32% | +1.08 |
| TEVA Teva Pharmaceutical-SP ADR | New | 1.03% | +1.03 |
| MLM Martin Marietta Materials | Add +18.1% | 4.08% | +0.93 |
| LLY Eli Lilly & Co. | Add +1.4% | 4.20% | +0.93 |
| HOOD Robinhood Markets Inc. Class A | New | 0.91% | +0.91 |
| ASND Ascendis Pharma A/S | New | 0.84% | +0.84 |
| ROKU Roku Inc. | New | 0.78% | +0.78 |
| VST Vistra Corp. | Add +57.8% | 2.09% | +0.78 |
| TKO Tko Group Holdings Inc. | New | 0.73% | +0.73 |
| CHKP Check Point Software Tech | New | 0.70% | +0.70 |
| SLNO Soleno Therapeutics Inc. | Add +42.3% | 1.10% | +0.69 |
| MELI MercadoLibre Inc. | Add +2.3% | 2.37% | +0.67 |
| DASH DoorDash Inc. Class A | Add +3.0% | 2.32% | +0.58 |
| ISRG Intuitive Surgical Inc. | Add +2.8% | 4.19% | +0.57 |
| GH Guardant Health Inc. | New | 0.56% | +0.56 |
| EMBJ Embraer SA-Spon ADR | Add +9.2% | 1.06% | +0.41 |
| DUOL Duolingo | Add +33.9% | 1.11% | +0.38 |
| ECHO Echostar Corp. Class A | Add +7.4% | 0.80% | +0.24 |
| ADBE Adobe Inc. | Add +18.9% | 1.26% | +0.22 |
| VRT Vertiv Holdings Co. Class A | Add +38.0% | 5.40% | +0.21 |
| VMC Vulcan Materials Co. | New | 0.17% | +0.17 |
| RXST Rxsight Inc. | Add +25.5% | 1.99% | +0.17 |
| INSP Inspire Medical Systems Inc. | Add +1.9% | 3.93% | +0.14 |
| SFM Sprouts Farmers Market Inc. | New | 0.11% | +0.11 |
| NVDA Nvidia Corp. | Add +11.8% | 0.87% | +0.06 |
| ANET Arista Networks Inc. | Add +2.1% | 2.55% | −0.45 |
| GKOS Glaukos Corp. | Add +10.0% | 3.98% | −0.67 |
Options Activity Q4 2024 → Q1 2025
| IWM iShares Russell 2000 ETF | put | Sold out | 2,000 | $44.2Mbefore exit |
| AAPL Apple Inc. | put | Sold out | 1,500 | $37.6Mbefore exit |
| TLT iShares 20+ Year Treasury BD | put | Sold out | 4,000 | $34.9Mbefore exit |
| IWM iShares Russell 2000 ETF | call | New | 1,500 | $29.9M |
| TSLA Tesla Inc. | call | Sold out | 600 | $24.2Mbefore exit |
| FIVE Five Below | call | Sold out | 1,000 | $10.5Mbefore exit |
| EW Edwards Lifesciences Corp. | call | Sold out | 1,200 | $8.9Mbefore exit |
| TSLA Tesla Inc. | put | New | 300 | $7.8M |
| LNTH Lantheus Holdings Inc. | put | New | 750 | $7.3M |
| SLNO Soleno Therapeutics Inc. | call | New | 650 | $4.6M |
| NVO Novo-Nordisk A/S-Spons ADR | call | Sold out | 500 | $4.3Mbefore exit |
| MU Micron Technology Inc. | call | New | 400 | $3.5M |
| DOCS Doximity Inc. Class A | call | New | 500 | $2.9M |
| MPT Medical Properties Trust Inc. | put | Sold out | 6,000 | $2.4Mbefore exit |
| WBA Walgreens Boots Alliance Inc. | put | New | 1,500 | $1.7M |
| RXST Rxsight Inc. | call | New | 500 | $1.3M |
| LUMN Lumen Technologies Inc. | put | Sold out | 2,000 | $1.1Mbefore exit |
| CLS Celestica Inc. | call | New | 100 | $788K |
| FLNA Filana Therapeutics Inc. | put | Sold out | 2,470 | $583Kbefore exit |
| OSCR Oscar Health Inc. Class A | call | Sold out | 342 | $460Kbefore exit |
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 62 | $1.0B | VRT, STX, AMD, LLY, INTC |
| Q1 2026 | 52 | $633.6M | VRT, LLY, ISRG, ECHO, STX |
| Q4 2025 | 64 | $718.1M | VRT, LLY, ISRG, TEVA, SHOP |
| Q3 2025 | 76 | $1.2B | VRT, AMZN, MSFT, SPOT, MLM |
| Q2 2025 | 57 | $957.3M | AMZN, VRT, MSFT, SPOT, MLM |
| Q1 2025 | 53 | $651.3M | AMZN, MSFT, VRT, SPOT, LLY |
| Q4 2024 | 73 | $772.3M | MSFT, VRT, AMZN, GKOS, INSP |
| Q3 2024 | 74 | $935.1M | NVDA, MSFT, MELI, AMZN, VRT |
| Q2 2024 | 75 | $862.5M | NVDA, MSFT, AMZN, VRT, MELI |
| Q1 2024 | 79 | $891.5M | NVDA, SWAV, MSFT, VRT, INSP |