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.
CIK: 0001599731
Total reported value
$1.5B
$1.5B
74 檔
14.6%
The Q4 2025 SEC filing reveals that Atika Capital Management LLC held a total portfolio value of $1.5B, covering 74 public equity positions.
Atika Capital Management LLC executed strategic sector rebalancing during Q4 2025, establishing 33 new positions while fully exiting 40 holdings and trimming 23 positions.
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | VRT | Vertiv Holdings Co-a | Stock-Industrials | 14.30% | -11.61% | +3.75% | |
| 2 | LLY | Eli Lilly & Co | Stock-Healthcare | 6.13% | -2.71% | — | |
| 3 | ISRG | Intuitive Surgical Inc | Stock-Healthcare | 4.50% | -2.65% | -0.03% | |
| 4 | TEVA | Teva Pharmaceutical-sp Adr | Stock-Healthcare | 3.12% | -1.06% | +221.43% | |
| 5 | SHOP | Shopify Inc - Class A | Stock-Tech | 2.77% | — | +57.96% | |
| 6 | MDGL | Madrigal Pharmaceuticals Inc | Stock-Healthcare | 2.75% | — | — | |
| 7 | BWXT | Bwx Technologies Inc | Stock-Industrials | 2.61% | -1.97% | -49.91% | |
| 8 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 2.56% | +2.74% | -79.85% | |
| 9 | COGT | Cogent Biosciences Inc | Stock-Other | 2.49% | -1.09% | — | |
| 10 | NFLX | Netflix Inc | Stock-Comm Services | 2.34% | -1.91% | +900.00% | |
| 11 | TLN | Talen Energy CORP | Stock-Utilities | 2.19% | -0.93% | EXIT | |
| 12 | STX | Seagate Technology Holdings plc | Stock-Tech | 1.98% | +1.77% | -56.13% | |
| 13 | CIEN | Ciena CORP | Stock-Tech | 1.95% | -1.10% | -25.00% | |
| 14 | ECHO | Echostar Corp-a | Stock-Comm Services | 1.94% | -0.70% | +76.46% | |
| 15 | TSLA | Tesla Inc | Stock-Consumer Disc | 1.87% | — | -3.23% | |
| 16 | INSM | Insmed Inc | Stock-Healthcare | 1.86% | — | -18.74% | |
| 17 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 1.84% | -1.95% | EXIT | |
| 18 | 430 | Terns Pharmaceuticals Inc | Stock-Other | 1.80% | -2.50% | EXIT | |
| 19 | MTZ | Mastec Inc | Stock-Industrials | 1.69% | -1.95% | +41.77% | |
| 20 | MELI | Mercadolibre Inc | Stock-Consumer Disc | 1.66% | -0.73% | -25.01% | |
| 21 | GH | Guardant Health Inc | Stock-Healthcare | 1.53% | +0.46% | -18.80% | |
| 22 | NET | Cloudflare Inc - Class A | Stock-Tech | 1.50% | -2.11% | EXIT | |
| 23 | FIVE | Five Below | Stock-Consumer Disc | 1.47% | -0.95% | +23.52% | |
| 24 | DASH | Doordash Inc - A | Stock-Consumer Disc | 1.45% | — | -27.22% | |
| 25 | APPF | Appfolio Inc - A | Stock-Tech | 1.44% | -0.68% | — | |
| 26 | AXSM | Axsome Therapeutics Inc | Stock-Healthcare | 1.41% | +1.01% | NEW | |
| 27 | MDB | Mongodb Inc | Stock-Tech | 1.30% | — | — | |
| 28 | REAL | Realreal Inc/the | Stock-Other | 1.24% | +0.09% | +51.07% | |
| 29 | HEI | Heico CORP | Stock-Industrials | 1.18% | -0.83% | EXIT | |
| 30 | LMND | Lemonade Inc | Stock-Financials | 1.13% | — | +65.10% | |
| 31 | QXO | Qxo Inc | Stock-Industrials | 1.12% | -0.81% | EXIT | |
| 32 | CSL | Carlisle Cos Inc | Stock-Industrials | 1.12% | — | — | |
| 33 | GE | General Electric | Stock-Industrials | 1.11% | -0.69% | EXIT | |
| 34 | PTGX | Protagonist Therapeutics Inc | Stock-Other | 1.04% | -0.53% | +3.61% | |
| 35 | EMBJ | Embraer Sa-spon Adr | Stock-Industrials | 1.04% | — | — | |
| 36 | ABVX | Abivax Sa-adr | Stock-Other | 1.03% | -0.26% | -20.29% | |
| 37 | IMNM | Immunome Inc | Stock-Other | 1.00% | -0.54% | — | |
| 38 | TTMI | Ttm Technologies | Stock-Tech | 0.97% | -0.82% | — | |
| 39 | ROKU | Roku Inc | Stock-Comm Services | 0.92% | — | -54.14% | |
| 40 | FERG | Ferguson Enterprises Inc | Stock-Industrials | 0.91% | -0.62% | — | |
| 41 | RH | Rh | Stock-Consumer Disc | 0.87% | — | — | |
| 42 | HOOD | Robinhood Markets Inc - A | Stock-Financials | 0.82% | — | -56.86% | |
| 43 | SN | SharkNinja, Inc. | Stock-Consumer Disc | 0.82% | +0.88% | NEW | |
| 44 | DNTH | Dianthus Therapeutics Inc | Stock-Other | 0.77% | -0.64% | — | |
| 45 | CW | Curtiss-wright CORP | Stock-Industrials | 0.76% | -0.59% | -1.68% | |
| 46 | WRBY | Warby Parker Inc-class A | Stock-Other | 0.75% | -0.15% | — | |
| 47 | MDLN | Medline Inc-cl A | Stock-Other | 0.69% | — | — | |
| 48 | TBBB | BBB Foods Inc. | Stock-Other | 0.66% | +0.15% | -10.51% | |
| 49 | FIGR | Figure Technology Solut-cl A | Stock-Other | 0.63% | — | +106.38% | |
| 50 | BBWI | Bath & Body Works Inc | Stock-Consumer Disc | 0.63% | — | — |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | VRT | Vertiv Holdings Co-a | +3.4% | +3.75% | Add |
| 2 | ECHO | Echostar Corp-a | +3.1% | +76.46% | Add |
| 3 | TEVA | Teva Pharmaceutical-sp Adr | +3% | +221.43% | Add |
| 4 | LLY | Eli Lilly & Co | +2.1% | — | Unchanged |
| 5 | ISRG | Intuitive Surgical Inc | +1.4% | -0.03% | Trim |
| 6 | SHOP | Shopify Inc - Class A | +1.2% | +57.96% | Add |
| 7 | REAL | Realreal Inc/the | +0.6% | +51.07% | Add |
| 8 | MTZ | Mastec Inc | +0.6% | +41.77% | Add |
| 9 | AXSM | Axsome Therapeutics Inc | +0.6% | +13.27% | Add |
| 10 | LMND | Lemonade Inc | +0.6% | +65.10% | Add |
| 11 | FIVE | Five Below | +0.5% | +23.52% | Add |
| 12 | CIEN | Ciena CORP | +0.5% | -25.00% | Trim |
| 13 | GH | Guardant Health Inc | +0.5% | -18.80% | Trim |
| 14 | PTGX | Protagonist Therapeutics Inc | +0.4% | +3.61% | Add |
| 15 | XENE | Xenon Pharmaceuticals Inc | +0.3% | +143.44% | Add |
| 16 | FIGR | Figure Technology Solut-cl A | +0.3% | +106.38% | Add |
| 17 | ABVX | Abivax Sa-adr | +0.3% | -20.29% | Trim |
| 18 | TSLA | Tesla Inc | +0.3% | -3.23% | Trim |
| 19 | INSM | Insmed Inc | +0.3% | -18.74% | Trim |
| 20 | IONS | Ionis Pharmaceuticals Inc | +0.3% | +120.87% | Add |
| 21 | SN | SharkNinja, Inc. | +0.3% | +31.50% | Add |
| 22 | FERG | Ferguson Enterprises Inc | +0.2% | — | Unchanged |
| 23 | TBBB | BBB Foods Inc. | +0.2% | -10.51% | Trim |
| 24 | CW | Curtiss-wright CORP | +0.1% | -1.68% | Trim |
| 25 | ASND | Ascendis Pharma A/S | +0.1% | -6.85% | Trim |
| 26 | APPF | Appfolio Inc - A | +0.1% | — | Unchanged |
| 27 | HOOD | Robinhood Markets Inc - A | +0.1% | -56.86% | Trim |
| 28 | NFLX | Netflix Inc | 0% | +900.00% | Add |
| 29 | GE | General Electric | 0% | -21.37% | Trim |
| 30 | FND | Floor & Decor Holdings Inc-a | -0.1% | -97.40% | Trim |
| 31 | MELI | Mercadolibre Inc | -0.2% | -25.01% | Trim |
| 32 | DASH | Doordash Inc - A | -0.3% | -27.22% | Trim |
| 33 | ROKU | Roku Inc | -0.4% | -54.14% | Trim |
| 34 | ALNY | Alnylam Pharmaceuticals Inc | -0.4% | -53.44% | Trim |
| 35 | U | Unity Software Inc | -0.5% | -99.39% | Trim |
| 36 | NET | Cloudflare Inc - Class A | -0.6% | -43.99% | Trim |
| 37 | TLN | Talen Energy CORP | -0.7% | -39.25% | Trim |
| 38 | CDTX | Cidara Therapeutics Inc | -1.1% | -99.97% | Trim |
| 39 | STX | Seagate Technology Holdings plc | -1.2% | -56.13% | Trim |
| 40 | BWXT | Bwx Technologies Inc | -1.3% | -49.91% | Trim |
| 41 | AMZN | Amazon.com Inc | -5.1% | -79.85% | Trim |
| 42 | XBI | Ss Spdr S&p Biotech ETF | — | NEW | New buy |
| 43 | MSFT | Microsoft CORP | — | EXIT | Sold out |
| 44 | SPOT | Spotify Technology S.A. | — | EXIT | Sold out |
| 45 | MLM | Martin Marietta Materials | — | EXIT | Sold out |
| 46 | ANET | Arista Networks Inc | — | EXIT | Sold out |
| 47 | CEG | Constellation Energy | — | EXIT | Sold out |
| 48 | GEV | GE Vernova Inc | — | EXIT | Sold out |
| 49 | META | Meta Platforms Inc-class A | — | EXIT | Sold out |
| 50 | VST | Vistra CORP | — | EXIT | Sold out |
According to official SEC Form 13F filings, Atika Capital Management LLC reported a total U.S. public equity portfolio value of $1.5B across 74 disclosed positions in Q4 2025.
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 14.6% of total reported equity market value during Q4 2025.
Top New Position Initiated
XBI
市值: $117.4M
Top Position Liquidated / Trimmed
MSFT
前期市值: $85.5M
During Q4 2025, Atika Capital Management LLC's top holdings by market value included VRT (14.3%)、LLY (6.1%)、ISRG (4.5%). The largest single position, VRT, represented 14.3% of total portfolio value.
In Q4 2025, Atika Capital Management LLC made 111 total portfolio adjustments, initiating 33 new buys, adding to 15 positions, trimming 23 holdings, and fully liquidating 40 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.