13F GuideFiling Basics
What is SEC Form 13F? Ultimate Guide to Institutional Equity Filings
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
AlphaSMO Research GuideRead Guide
CIK: 0001599731
Total reported value
$1.5B
$1.5B
56 檔
18.0%
In Q1 2026, Atika Capital Management LLC's U.S. equity holdings reached a combined market value of $1.5B, distributed across 56 disclosed stock positions.
In Q1 2026, Atika Capital Management LLC adopted a defensive or profit-taking posture, trimming 24 positions and completely liquidating 34 holdings to manage risk exposure.
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | VRT | Vertiv Holdings Co-a | Stock-Industrials | 26.27% | -11.61% | +4.72% | |
| 2 | LLY | Eli Lilly & Co | Stock-Healthcare | 5.95% | -2.71% | — | |
| 3 | ISRG | Intuitive Surgical Inc | Stock-Healthcare | 4.15% | -2.65% | — | |
| 4 | ECHO | Echostar Corp-a | Stock-Comm Services | 3.38% | -0.70% | +42.55% | |
| 5 | STX | Seagate Technology Holdings plc | Stock-Tech | 3.30% | +1.77% | +3.07% | |
| 6 | MTZ | Mastec Inc | Stock-Industrials | 2.92% | -1.95% | +2.93% | |
| 7 | NFLX | Netflix Inc | Stock-Comm Services | 2.75% | -1.91% | +0.92% | |
| 8 | CIEN | Ciena CORP | Stock-Tech | 2.67% | -1.10% | -27.25% | |
| 9 | BWXT | Bwx Technologies Inc | Stock-Industrials | 2.66% | -1.97% | -24.20% | |
| 10 | 430 | Terns Pharmaceuticals Inc | Stock-Other | 2.50% | -2.50% | EXIT | |
| 11 | TEVA | Teva Pharmaceutical-sp Adr | Stock-Healthcare | 2.26% | -1.06% | -33.75% | |
| 12 | NET | Cloudflare Inc - Class A | Stock-Tech | 2.11% | -2.11% | EXIT | |
| 13 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 1.95% | -1.95% | EXIT | |
| 14 | COGT | Cogent Biosciences Inc | Stock-Other | 1.78% | -1.09% | -42.06% | |
| 15 | ORKA | Oruka Therapeutics Inc | Stock-Other | 1.78% | -1.15% | — | |
| 16 | DNTH | Dianthus Therapeutics Inc | Stock-Other | 1.70% | -0.64% | -4.26% | |
| 17 | WDC | Western Digital CORP | Stock-Tech | 1.61% | -0.50% | — | |
| 18 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 1.43% | +2.74% | -45.38% | |
| 19 | TTMI | Ttm Technologies | Stock-Tech | 1.43% | -0.82% | -8.35% | |
| 20 | FIVE | Five Below | Stock-Consumer Disc | 1.42% | -0.95% | -29.75% | |
| 21 | CW | Curtiss-wright CORP | Stock-Industrials | 1.39% | -0.59% | +31.55% | |
| 22 | GH | Guardant Health Inc | Stock-Healthcare | 1.32% | +0.46% | -15.74% | |
| 23 | MELI | Mercadolibre Inc | Stock-Consumer Disc | 1.23% | -0.73% | -24.16% | |
| 24 | APPF | Appfolio Inc - A | Stock-Tech | 1.18% | -0.68% | +6.74% | |
| 25 | GDX | Vaneck Gold Miners ETF | ETF-Commodities | 1.18% | -1.18% | EXIT | |
| 26 | UTHR | United Therapeutics CORP | Stock-Healthcare | 1.15% | -1.15% | EXIT | |
| 27 | KRMN | Karman Holdings Inc | Stock-Industrials | 1.14% | -1.14% | EXIT | |
| 28 | FERG | Ferguson Enterprises Inc | Stock-Industrials | 1.08% | -0.62% | — | |
| 29 | PTGX | Protagonist Therapeutics Inc | Stock-Other | 1.03% | -0.53% | -27.79% | |
| 30 | CLH | Clean Harbors Inc | Stock-Industrials | 0.99% | -0.99% | EXIT | |
| 31 | TLN | Talen Energy CORP | Stock-Utilities | 0.93% | -0.93% | EXIT | |
| 32 | IMNM | Immunome Inc | Stock-Other | 0.91% | -0.54% | -21.37% | |
| 33 | META | Meta Platforms Inc-class A | Stock-Comm Services | 0.90% | -0.90% | EXIT | |
| 34 | DBVT | Dbv Technologies Sa-spon Adr | Stock-Other | 0.89% | -0.89% | EXIT | |
| 35 | RKLB | Rocket Lab CORP | Stock-Industrials | 0.87% | +0.26% | +38.45% | |
| 36 | HEI | Heico CORP | Stock-Industrials | 0.83% | -0.83% | EXIT | |
| 37 | QXO | Qxo Inc | Stock-Industrials | 0.81% | -0.81% | EXIT | |
| 38 | SITM | Sitime CORP | Stock-Tech | 0.80% | -0.06% | — | |
| 39 | GE | General Electric | Stock-Industrials | 0.69% | -0.69% | EXIT | |
| 40 | ASND | Ascendis Pharma A/S | Stock-Other | 0.69% | -0.69% | EXIT | |
| 41 | REAL | Realreal Inc/the | Stock-Other | 0.64% | +0.09% | -20.17% | |
| 42 | LASR | Nlight Inc | Stock-Other | 0.59% | -0.34% | — | |
| 43 | XENE | Xenon Pharmaceuticals Inc | Stock-Other | 0.55% | -0.55% | EXIT | |
| 44 | TBBB | BBB Foods Inc. | Stock-Other | 0.53% | +0.15% | -33.08% | |
| 45 | MAZE | Maze Therapeutics Inc | Stock-Other | 0.52% | -0.52% | EXIT | |
| 46 | ABVX | Abivax Sa-adr | Stock-Other | 0.50% | -0.26% | -47.64% | |
| 47 | ACHC | Acadia Healthcare Co Inc | Stock-Other | 0.45% | -0.45% | EXIT | |
| 48 | WRBY | Warby Parker Inc-class A | Stock-Other | 0.45% | -0.15% | -45.78% | |
| 49 | KRYS | Krystal Biotech Inc | Stock-Healthcare | 0.43% | -0.28% | — | |
| 50 | BBIO | Bridgebio Pharma Inc | Stock-Healthcare | 0.41% | -0.41% | EXIT |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | VRT | Vertiv Holdings Co-a | +12% | +4.72% | Add |
| 2 | ORKA | Oruka Therapeutics Inc | +1.8% | NEW | New buy |
| 3 | WDC | Western Digital CORP | +1.6% | NEW | New buy |
| 4 | ECHO | Echostar Corp-a | +1.4% | +42.55% | Add |
| 5 | STX | Seagate Technology Holdings plc | +1.3% | +3.07% | Add |
| 6 | MTZ | Mastec Inc | +1.2% | +2.93% | Add |
| 7 | GDX | Vaneck Gold Miners ETF | +1.2% | NEW | New buy |
| 8 | UTHR | United Therapeutics CORP | +1.2% | NEW | New buy |
| 9 | KRMN | Karman Holdings Inc | +1.1% | NEW | New buy |
| 10 | DNTH | Dianthus Therapeutics Inc | +0.9% | -4.26% | Trim |
| 11 | META | Meta Platforms Inc-class A | +0.9% | NEW | New buy |
| 12 | CLH | Clean Harbors Inc | +0.9% | +628.50% | Add |
| 13 | SITM | Sitime CORP | +0.8% | NEW | New buy |
| 14 | CIEN | Ciena CORP | +0.7% | -27.25% | Trim |
| 15 | 430 | Terns Pharmaceuticals Inc | +0.7% | -6.37% | Trim |
| 16 | CW | Curtiss-wright CORP | +0.6% | +31.55% | Add |
| 17 | NET | Cloudflare Inc - Class A | +0.6% | +18.40% | Add |
| 18 | LASR | Nlight Inc | +0.6% | NEW | New buy |
| 19 | MAZE | Maze Therapeutics Inc | +0.5% | NEW | New buy |
| 20 | TTMI | Ttm Technologies | +0.5% | -8.35% | Trim |
| 21 | ACHC | Acadia Healthcare Co Inc | +0.5% | NEW | New buy |
| 22 | KRYS | Krystal Biotech Inc | +0.4% | NEW | New buy |
| 23 | BBIO | Bridgebio Pharma Inc | +0.4% | NEW | New buy |
| 24 | NFLX | Netflix Inc | +0.4% | +0.92% | Add |
| 25 | HUT | Hut 8 CORP | +0.4% | NEW | New buy |
| 26 | HEI-A | Heico Corp-class A | +0.4% | NEW | New buy |
| 27 | DBVT | Dbv Technologies Sa-spon Adr | +0.3% | +31.14% | Add |
| 28 | RKLB | Rocket Lab CORP | +0.3% | +38.45% | Add |
| 29 | FERG | Ferguson Enterprises Inc | +0.2% | — | Unchanged |
| 30 | GOOG | Alphabet Inc-cl C | +0.1% | +2.49% | Add |
| 31 | ASND | Ascendis Pharma A/S | +0.1% | -7.35% | Trim |
| 32 | BWXT | Bwx Technologies Inc | +0.1% | -24.20% | Trim |
| 33 | SMH | Vaneck Semiconductor ETF | 0% | NEW | New buy |
| 34 | INTC | Intel CORP | 0% | NEW | New buy |
| 35 | IWM | Ishares Russell 2000 ETF | 0% | +9.89% | Add |
| 36 | MRNA | Moderna Inc | — | EXIT | Sold out |
| 37 | U | Unity Software Inc | — | EXIT | Sold out |
| 38 | CDTX | Cidara Therapeutics Inc | — | EXIT | Sold out |
| 39 | PTGX | Protagonist Therapeutics Inc | 0% | -27.79% | Trim |
| 40 | IBIT | Ishares Bitcoin Trust ETF | 0% | EXIT | Sold out |
| 41 | FND | Floor & Decor Holdings Inc-a | 0% | EXIT | Sold out |
| 42 | RIVN | Rivian Automotive Inc-a | 0% | EXIT | Sold out |
| 43 | EEM | Ishares Msci Emerging Market | 0% | EXIT | Sold out |
| 44 | EOSE | Eos Energy Enterprises Inc | 0% | EXIT | Sold out |
| 45 | XENE | Xenon Pharmaceuticals Inc | 0% | -35.25% | Trim |
| 46 | FIVE | Five Below | -0.1% | -29.75% | Trim |
| 47 | RDDT | Reddit Inc-cl A | -0.1% | EXIT | Sold out |
| 48 | XBI | Ss Spdr S&p Biotech ETF | -0.1% | -56.10% | Trim |
| 49 | IMNM | Immunome Inc | -0.1% | -21.37% | Trim |
| 50 | TBBB | BBB Foods Inc. | -0.1% | -33.08% | Trim |
According to official SEC Form 13F filings, Atika Capital Management LLC reported a total U.S. public equity portfolio value of $1.5B across 56 disclosed positions in Q1 2026.
Expert Analysis & Guides for Tracking Wall Street Smart Money Movements
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
In terms of portfolio concentration, the top 5 core holdings (including VRT, LLY, ISRG) accounted for 18.0% of total reported equity market value during Q1 2026.
Top New Position Initiated
ORKA
市值: $11.3M
Top Position Liquidated / Trimmed
SHOP
前期市值: $20.0M
During Q1 2026, Atika Capital Management LLC's top holdings by market value included VRT (26.3%)、LLY (6.0%)、ISRG (4.2%). The largest single position, VRT, represented 26.3% of total portfolio value.
In Q1 2026, Atika Capital Management LLC made 87 total portfolio adjustments, initiating 16 new buys, adding to 13 positions, trimming 24 holdings, and fully liquidating 34 stocks.
All holding records on this page are fetched directly from the U.S. Securities and Exchange Commission (SEC) EDGAR system (Form 13F-HR). AlphaSMO parses CUSIP identifiers and formats data into Schema.org-compliant datasets.
Understand SEC Form 4 insider disclosures for corporate officers, directors, and 10% owners to track executive transactions.
Understand Rule 144 restricted stock sale notices to spot planned insider liquidations before market sell pressure arrives.
Explore the 5% beneficial ownership threshold, 13D vs 13G filing differences, and recent SEC accelerated deadline rules.
Best practices for analyzing 13F quarterly changes without getting misled by stock splits, options, or market valuation drift.
Learn how AlphaSMO's flagship signal detects high-conviction stocks where 13F hedge funds and corporate insiders buy at the same time.