Atika Capital Management LLC
Long book
$633.6M
Q1 2026
Positions
52
Top-10 weight
57%
concentration
Last quarter
+16.7%
SPY +14.8%
Turnover
51%
of book per quarter
Strategy in plain words
auto-generated from filingsAtika Capital Management LLC is a diversified fundamental manager, running a $633.6M US long book across 52 positions.
The portfolio is concentrated: the top 10 names carry 57% of the portfolio. Turnover is high — positions rotate quickly, so individual names matter less than the process. Current anchor positions: VERTIV HOLDINGS CO-A, ELI LILLY & CO, INTUITIVE SURGICAL INC, ECHOSTAR CORP-A, SEAGATE TECHNOLOGY HOLDINGS.
Over the last 9 quarters its long book ran on average 1.1pp per quarter ahead of the S&P 500, beating the index in 4 of 9 quarters. We rate its filings as signal-bearing: position changes reflect genuine views.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+0.8%
Q2 2024
+6.5%
Q3 2024
-0.7%
Q4 2024
-11.5%
Q1 2025
+24.4%
Q2 2025
+6.9%
Q3 2025
+1.6%
Q4 2025
+5.8%
Q1 2026
+16.7%
Sector allocation
Technology 42%
Healthcare 24%
Industrials 12%
Consumer discretionary 6%
Other 6%
Services media 4%
Communications 4%
Utilities 2%
Long book by quarter
What does Atika Capital own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| VRT VERTIV HOLDINGS CO-A | Technology | 666.1K | $166.9M | 26.3% | +4.7% |
| LLY ELI LILLY & CO | Healthcare | 41.1K | $37.8M | 6.0% | Held |
| ISRG INTUITIVE SURGICAL INC | Healthcare | 57.2K | $26.4M | 4.2% | Held |
| ECHO ECHOSTAR CORP-A | Communications | 182.0K | $21.3M | 3.4% | +45.8% |
| STXN SEAGATE TECHNOLOGY HOLDINGS | — | 53.5K | $21.0M | 3.3% | +3.1% |
| MTZ MASTEC INC | Industrials | 57.6K | $18.5M | 2.9% | +2.9% |
| NFLX NETFLIX INC | Services media | 180.0K | $17.3M | 2.7% | Held |
| CIEN CIENA CORP | Technology | 43.7K | $16.9M | 2.7% | -27.2% |
| BWXT BWX TECHNOLOGIES INC | Industrials | 82.5K | $16.9M | 2.7% | -24.2% |
| 430 TERNS PHARMACEUTICALS INC | — | 300.0K | $15.8M | 2.5% | -6.6% |
| NET CLOUDFLARE INC - CLASS A | Technology | 65.0K | $13.4M | 2.1% | +18.4% |
| GOOG ALPHABET INC-CL C | Technology | 43.3K | $12.4M | 2.0% | +2.5% |
| COGT COGENT BIOSCIENCES INC | Healthcare | 293.2K | $11.3M | 1.8% | -42.1% |
| ORKA ORUKA THERAPEUTICS INC | Healthcare | 229.9K | $11.3M | 1.8% | New |
| DNTH DIANTHUS THERAPEUTICS INC | Healthcare | 128.8K | $10.8M | 1.7% | -4.3% |
| WDC WESTERN DIGITAL CORP | Technology | 37.7K | $10.2M | 1.6% | New |
| AMZN AMAZON.COM INC | Consumer discretionary | 43.7K | $9.1M | 1.4% | -45.4% |
| TTMI TTM TECHNOLOGIES | Technology | 93.0K | $9.1M | 1.4% | -8.4% |
| FIVE FIVE BELOW | Consumer discretionary | 39.5K | $9.0M | 1.4% | -29.8% |
| CW CURTISS-WRIGHT CORP | Industrials | 13.0K | $8.9M | 1.4% | +31.6% |
| GH GUARDANT HEALTH INC | Healthcare | 91.0K | $8.4M | 1.3% | -15.7% |
| MELI MERCADOLIBRE INC | Services media | 4.5K | $7.8M | 1.2% | -24.2% |
| APPF APPFOLIO INC - A | Technology | 47.5K | $7.5M | 1.2% | +6.7% |
| UTHR UNITED THERAPEUTICS CORP | Healthcare | 12.3K | $7.3M | 1.2% | New |
| KRMN KARMAN HOLDINGS INC | Industrials | 90.5K | $7.2M | 1.1% | New |
| FERG FERGUSON ENTERPRISES INC | Consumer discretionary | 29.3K | $6.8M | 1.1% | Held |
| PTGX PROTAGONIST THERAPEUTICS INC | Healthcare | 62.1K | $6.5M | 1.0% | -27.8% |
| CLH CLEAN HARBORS INC | Utilities | 21.9K | $6.3M | 1.0% | +628.5% |
| TLN TALEN ENERGY CORP | Utilities | 18.5K | $5.9M | 0.9% | -56.1% |
| IMNM IMMUNOME INC | Healthcare | 262.9K | $5.7M | 0.9% | -21.4% |
| META META PLATFORMS INC-CLASS A | Technology | 10.0K | $5.7M | 0.9% | New |
| RKLB ROCKET LAB CORP | Industrials | 86.0K | $5.5M | 0.9% | +38.5% |
| HEI HEICO CORP | Industrials | 19.3K | $5.3M | 0.8% | -26.7% |
| QXO QXO INC | Consumer discretionary | 264.3K | $5.1M | 0.8% | -37.1% |
| SITM SITIME CORP | Technology | 14.8K | $5.1M | 0.8% | New |
| GE GENERAL ELECTRIC | Industrials | 15.5K | $4.4M | 0.7% | -40.2% |
| REAL REALREAL INC/THE | Consumer discretionary | 451.1K | $4.1M | 0.6% | -20.2% |
| LASR NLIGHT INC | Technology | 66.0K | $3.8M | 0.6% | New |
| XENE XENON PHARMACEUTICALS INC | Healthcare | 59.9K | $3.5M | 0.5% | -35.2% |
| TBBB BBB FOODS INC-CLASS A | Consumer discretionary | 95.2K | $3.4M | 0.5% | -33.1% |
| MAZE MAZE THERAPEUTICS INC | Healthcare | 111.5K | $3.3M | 0.5% | New |
| ACHC ACADIA HEALTHCARE CO INC | Healthcare | 122.6K | $2.9M | 0.5% | New |
| WRBY WARBY PARKER INC-CLASS A | Healthcare | 135.0K | $2.8M | 0.4% | -45.8% |
| KRYS KRYSTAL BIOTECH INC | Healthcare | 10.6K | $2.7M | 0.4% | New |
| BBIO BRIDGEBIO PHARMA INC | Healthcare | 35.2K | $2.6M | 0.4% | New |
| HUT HUT 8 CORP | Financials | 49.3K | $2.3M | 0.4% | New |
| HEI/A HEICO CORP-CLASS A | Industrials | 10.6K | $2.2M | 0.4% | New |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 14, 2026 | 180 | $796.4M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 13, 2026 | 231 | $949.8M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 13, 2025 | 258 | $1.24B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 13, 2025 | 189 | $1000.0M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 14, 2025 | 186 | $711.1M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 13, 2025 | 252 | $941.4M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 13, 2024 | 252 | $975.4M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 13, 2024 | 273 | $1.02B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 14, 2024 | 264 | $1.02B | canonical | SEC ↗ |
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