Institutional
Atika Capital Management LLC
CIK 0001599731
$796.4M
Reported AUM
56
Positions
Q1 2026
Period
2026-05-14
Filed
The Brief · Atika Capital Management LLC · Q1 2026
AI · grounded in 13F
Atika Capital Management LLC exited its position in SHOP for a reduction of $19.96M. The fund also closed positions in MDGL for $19.8M and HOOD for $13.74M. On the buy side, the fund established new positions in SMH for $27.6M and GDX for $21.1M. Additionally, the fund accumulated shares of VRT, increasing its position by 4.72%.
Portfolio · Q1 2026
Top holdings
QoQ vs Q4 2025
| # | Stock | Issuer | Price | Day % | 1Y Gr. | 5Y Gr. | Value | % of book | Δ shares (QoQ) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | VRT | VERTIV HOLDINGS CO | $302.87 | 1.68% | 168.94% | 967.90% | $166.9M | 20.96% | +30,000 | +4.7% |
| 2 | XBI | SPDR SERIES TRUST | $133.79 | 0.79% | 60.62% | 8.99% | $54.0M | 6.78% | −5,400 | −56.1% |
| 3 | SATS | ECHOSTAR CORP | $114.08 | -10.97% | 577.43% | 411.57% | $39.8M | 5.00% | +54,794 | +42.5% |
| 4 | LLY | ELI LILLY & CO | $1133.00 | -2.41% | 39.26% | 387.78% | $37.8M | 4.75% | — | HELD |
| 5 | NFLX | NETFLIX INC. | $80.34 | -1.14% | -33.54% | 55.64% | $33.2M | 4.17% | +1,650 | +0.9% |
| 6 | SMH | VANECK ETF TRUST | $619.96 | 1.72% | 137.74% | 377.10% | $27.6M | 3.47% | +720 | NEW |
| 7 | ISRG | INTUITIVE SURGICAL INC | $411.06 | -0.45% | -19.38% | 24.94% | $26.4M | 3.31% | — | HELD |
| 8 | IWM | ISHARES TR | $292.95 | 0.87% | 41.76% | 40.71% | $24.8M | 3.11% | +90 | +9.9% |
| 9 | GDX | VANECK ETF TRUST | $80.03 | 2.97% | 48.02% | 145.63% | $21.1M | 2.65% | +81,500 | NEW |
| 10 | STX | SEAGATE TECHNOLOGY HLDNGS PL | $931.04 | 7.25% | 632.48% | 1114.56% | $21.0M | 2.63% | +1,593 | +3.1% |
| 11 | 430 | TERNS PHARMACEUTICALS INC | — | — | — | — | $19.6M | 2.46% | −20,445 | −6.4% |
| 12 | MTZ | MASTEC INC | $362.97 | 1.25% | 123.92% | 258.56% | $18.5M | 2.33% | +1,638 | +2.9% |
| 13 | CIEN | CIENA CORP | $445.98 | 0.17% | 518.04% | 667.08% | $16.9M | 2.13% | −16,349 | −27.2% |
| 14 | BWXT | BWX TECHNOLOGIES INC | $193.45 | -0.63% | 40.89% | 256.65% | $16.9M | 2.12% | −26,350 | −24.2% |
| 15 | TEVA | TEVA PHARMACEUTICAL INDS LTD | $34.63 | 0.20% | 100.47% | 252.95% | $14.4M | 1.80% | −243,000 | −33.8% |
| 16 | NET | CLOUDFLARE INC | $228.48 | 0.46% | 32.86% | 92.60% | $13.4M | 1.68% | +10,100 | +18.4% |
| 17 | GOOG | ALPHABET INC | $358.16 | 0.45% | 104.47% | 167.21% | $12.4M | 1.56% | +1,050 | +2.5% |
| 18 | COGT | COGENT BIOSCIENCES INC | $33.10 | 1.47% | 367.51% | 451.67% | $11.3M | 1.42% | −212,800 | −42.1% |
| 19 | ORKA | ORUKA THERAPEUTICS INC | $69.89 | 2.07% | 456.45% | 242.70% | $11.3M | 1.42% | +229,900 | NEW |
| 20 | DNTH | DIANTHUS THERAPEUTICS INC | $82.07 | 7.35% | 348.23% | -27.96% | $10.8M | 1.36% | −5,728 | −4.3% |
| 21 | WDC | WESTERN DIGITAL CORP | $562.92 | 6.35% | 913.38% | 1052.26% | $10.2M | 1.28% | +37,717 | NEW |
| 22 | AMZN | AMAZON COM INC | $238.55 | -1.23% | 12.47% | 43.38% | $9.1M | 1.14% | −36,300 | −45.4% |
| 23 | TTMI | TTM TECHNOLOGIES INC | $194.05 | 3.65% | 451.13% | 1293.78% | $9.1M | 1.14% | −8,473 | −8.3% |
| 24 | FIVE | FIVE BELOW INC | $198.49 | -1.72% | 62.80% | 2.02% | $9.0M | 1.13% | −16,720 | −29.8% |
| 25 | CW | CURTISS WRIGHT CORP | $758.00 | 0.10% | 60.42% | 551.87% | $8.9M | 1.11% | +3,118 | +31.6% |
| 26 | GH | GUARDANT HEALTH INC | $131.62 | 0.55% | 167.03% | 19.87% | $8.4M | 1.06% | −17,000 | −15.7% |
| 27 | MELI | MERCADOLIBRE INC | $1589.60 | -1.27% | -32.98% | 1.33% | $7.8M | 0.98% | −1,437 | −24.2% |
| 28 | APPF | APPFOLIO INC | $161.21 | 0.96% | -28.53% | 13.85% | $7.5M | 0.94% | +3,000 | +6.7% |
| 29 | UTHR | UNITED THERAPEUTICS CORP DEL | $545.96 | 0.10% | 92.68% | 200.09% | $7.3M | 0.92% | +12,350 | NEW |
| 30 | KRMN | KARMAN HLDGS INC | $47.83 | -3.53% | 0.89% | 43.12% | $7.2M | 0.91% | +90,500 | NEW |
| 31 | FERG | FERGUSON ENTERPRISES INC | $230.08 | 0.90% | — | — | $6.8M | 0.86% | — | HELD |
| 32 | PTGX | PROTAGONIST THERAPEUTICS INC | $109.78 | -0.01% | — | — | $6.5M | 0.82% | −23,900 | −27.8% |
| 33 | CLH | CLEAN HARBORS INC | $287.78 | 0.35% | — | — | $6.3M | 0.79% | +18,855 | +628.5% |
| 34 | TLN | TALEN ENERGY CORP | $360.54 | 4.56% | — | — | $5.9M | 0.74% | −23,610 | −56.1% |
| 35 | IMNM | IMMUNOME INC | $18.38 | 0.11% | — | — | $5.7M | 0.72% | −71,441 | −21.4% |
| 36 | META | META PLATFORMS INC | $566.98 | -0.26% | — | — | $5.7M | 0.72% | +10,000 | NEW |
| 37 | DBVT | DBV TECHNOLOGIES S A | $17.42 | 5.29% | — | — | $5.7M | 0.71% | +64,419 | +31.1% |
| 38 | RKLB | ROCKET LAB CORP | $102.39 | -10.79% | — | — | $5.5M | 0.69% | +23,885 | +38.5% |
| 39 | HEI | HEICO CORP NEW | $331.61 | -2.24% | — | — | $5.3M | 0.66% | −7,035 | −26.7% |
| 40 | QXO | QXO INC | $16.63 | 0.30% | — | — | $5.1M | 0.64% | −155,747 | −37.1% |
| 41 | SITM | SITIME CORP | $729.89 | 1.20% | — | — | $5.1M | 0.64% | +14,805 | NEW |
| 42 | INTC | INTEL CORP | $124.57 | 6.51% | — | — | $4.4M | 0.55% | +1,000 | NEW |
| 43 | GE | GE AEROSPACE | $335.30 | 0.76% | — | — | $4.4M | 0.55% | −10,438 | −40.2% |
| 44 | ASNDUSD | ASCENDIS PHARMA A/S | — | — | — | — | $4.4M | 0.55% | −1,517 | −7.3% |
| 45 | REAL | THE REALREAL INC | $10.28 | 4.47% | — | — | $4.1M | 0.51% | −113,945 | −20.2% |
| 46 | LASR | NLIGHT INC | $69.66 | -0.76% | — | — | $3.8M | 0.47% | +66,000 | NEW |
| 47 | XENE | XENON PHARMACEUTICALS INC | $52.10 | -0.17% | — | — | $3.5M | 0.44% | −32,606 | −35.2% |
| 48 | TBBB | BBB FOODS INC | $42.12 | 0.74% | — | — | $3.4M | 0.42% | −47,064 | −33.1% |
| 49 | MAZE | MAZE THERAPEUTICS INC | $24.05 | -0.17% | — | — | $3.3M | 0.42% | +111,500 | NEW |
| 50 | ABVX | ABIVAX SA | $96.55 | -4.28% | — | — | $3.2M | 0.40% | −26,200 | −47.6% |
| 51 | ACHC | ACADIA HEALTHCARE COMPANY IN | $24.60 | -1.17% | — | — | $2.9M | 0.36% | +122,600 | NEW |
| 52 | WRBY | WARBY PARKER INC | $26.46 | 2.32% | — | — | $2.8M | 0.36% | −113,971 | −45.8% |
| 53 | KRYS | KRYSTAL BIOTECH INC | $317.97 | -1.11% | — | — | $2.7M | 0.34% | +10,625 | NEW |
| 54 | BBIO | BRIDGEBIO PHARMA INC | $66.80 | -1.11% | — | — | $2.6M | 0.33% | +35,200 | NEW |
| 55 | HUT | HUT 8 CORP | $118.86 | 2.19% | — | — | $2.3M | 0.29% | +49,300 | NEW |
| 56 | HEI/A | HEICO CORP NEW | — | — | — | — | $2.2M | 0.28% | +10,575 | NEW |
| 57 | SHOP | SHOPIFY INC | $108.24 | -2.02% | — | — | — | — | −124,000 | EXITED |
| 58 | MDGL | MADRIGAL PHARMACEUTICALS | $480.77 | 1.37% | — | — | — | — | −34,000 | EXITED |
| 59 | HOOD | ROBINHOOD MKTS INC | $93.19 | 1.04% | — | — | — | — | −52,200 | EXITED |
| 60 | TSLA | TESLA INC | $406.43 | 1.82% | — | — | — | — | −30,000 | EXITED |
| 61 | INSM | INSMED INC | $97.85 | 1.17% | — | — | — | — | −77,200 | EXITED |
| 62 | DASH | DOORDASH INC | $150.58 | -2.59% | — | — | — | — | −46,000 | EXITED |
| 63 | AXSM | AXSOME THERAPEUTICS INC | $255.17 | 0.55% | — | — | — | — | −55,500 | EXITED |
| 64 | MDB | MONGODB INC | $342.80 | -3.28% | — | — | — | — | −22,326 | EXITED |
| 65 | LMND | LEMONADE INC | $57.49 | 0.54% | — | — | — | — | −113,917 | EXITED |
| 66 | CSL | CARLISLE COS INC | $343.77 | 0.82% | — | — | — | — | −25,300 | EXITED |
| 67 | EMBJ | EMBRAER S.A. | $57.80 | 3.03% | — | — | — | — | −115,930 | EXITED |
| 68 | IBIT | ISHARES BITCOIN TRUST ETF | $36.04 | -0.03% | — | — | — | — | −1,500 | EXITED |
| 69 | ROKU | ROKU INC | $143.66 | 20.08% | — | — | — | — | −61,000 | EXITED |
| 70 | RH | RH | $153.04 | -3.94% | — | — | — | — | −35,000 | EXITED |
| 71 | SN | SHARKNINJA INC | $133.80 | -1.32% | — | — | — | — | −52,600 | EXITED |
| 72 | MDLN | MEDLINE INC | $36.61 | -1.40% | — | — | — | — | −117,800 | EXITED |
| 73 | FND | FLOOR & DECOR HLDGS INC | $53.34 | -0.80% | — | — | — | — | −800 | EXITED |
| 74 | RIVN | RIVIAN AUTOMOTIVE INC | $16.76 | 7.85% | — | — | — | — | −2,420 | EXITED |
| 75 | FIGR | FIGURE TECHNOLOGY SOLUTIO | $27.93 | -0.78% | — | — | — | — | −111,447 | EXITED |
| 76 | BBWI | BATH & BODY WORKS INC | $19.40 | 3.08% | — | — | — | — | −225,000 | EXITED |
| 77 | EEM | ISHARES TR | $67.88 | 0.56% | — | — | — | — | −816 | EXITED |
| 78 | EOSE | EOS ENERGY ENTERPRISES INC | $6.06 | -2.26% | — | — | — | — | −3,720 | EXITED |
| 79 | ALNY | ALNYLAM PHARMACEUTICALS INC | $282.85 | -2.26% | — | — | — | — | −10,339 | EXITED |
| 80 | KNSA | KINIKSA PHARMACEUTICALS | $51.89 | 0.60% | — | — | — | — | −93,970 | EXITED |
| 81 | IONS | IONIS PHARMACEUTICALS INC | $73.28 | -0.73% | — | — | — | — | −47,488 | EXITED |
| 82 | ANF | ABERCROMBIE & FITCH CO | $90.57 | -0.06% | — | — | — | — | −29,000 | EXITED |
| 83 | RAPT | RAPT THERAPEUTICS INC | — | — | — | — | — | — | −94,245 | EXITED |
| 84 | AAOI | APPLIED OPTOELECTRONICS INC | $169.05 | -2.16% | — | — | — | — | −87,657 | EXITED |
| 85 | RKT | ROCKET COS INC | $13.07 | -2.68% | — | — | — | — | −130,000 | EXITED |
| 86 | MRNA | MODERNA INC | $49.91 | 0.54% | — | — | — | — | −760 | EXITED |
| 87 | U | UNITY SOFTWARE INC | $27.24 | 1.98% | — | — | — | — | −500 | EXITED |
| 88 | CECO | CECO ENVIRONMENTAL CORP | $96.74 | 0.34% | — | — | — | — | −29,804 | EXITED |
| 89 | CDTX | CIDARA THERAPEUTICS INC | — | — | — | — | — | — | −49 | EXITED |
| 90 | RDDT | REDDIT INC | $162.10 | -6.44% | — | — | — | — | −2,000 | EXITED |
Source: SEC EDGAR · accession 0001214659-26-006119. 13F discloses long positions only — shorts, foreign equities, and options are excluded.