Atika Capital Management LLC
13F filer · CIK 1599731 · New York, NY
Summary
Atika Capital Management LLC reported $1.52B across 81 positions in its 13F for 2026 Q2, filed Aug 13, 2026. The largest holdings are VRT (14.7%), STX (5.1%), AMD (3.6%). Versus 2026 Q1, leaving options aside, it opened 29 new positions, added to 13, trimmed 11 and sold out of 19.
Reported value$1.52B
Positions81incl. options
Report period2026 Q2
FiledAug 13, 2026
New positions29
Added13
Trimmed11
Sold out19
Top 25 holdings
By reported value, options listed separately · change vs 2026 Q1
Weight 14.7%Value $223.02MPrice $248.34Shares 666KSince Jun 30 -25.83%
Weight 5.1%Value $77.07MPrice $913.45Shares 80K +49.28%Since Jun 30 -5.34%
Weight 3.6%Value $55.48MPrice $607.57Shares 96KSince Jun 30 +4.59%
Weight 3.2%Value $49.30MPrice $1185Shares 41KSince Jun 30 -1.23%
Weight 2.4%Value $36.86MPrice $115.93Shares 264KSince Jun 30 -16.97%
Weight 2.2%Value $33.64MPrice $89.89Shares 331K +82.09%Since Jun 30 -11.44%
Weight 1.8%Value $27.16MPrice $177.73Shares 181K +98.90%Since Jun 30 +18.46%
Weight 1.6%Value $23.92MPrice $354.92Shares 49K +11.72%Since Jun 30 -27.65%
Weight 1.5%Value $22.75MPrice $412.18Shares 57KSince Jun 30 +3.65%
Weight 1.2%Value $17.69MPrice $71.70Shares 118KSince Jun 30 -52.17%
Weight 1.1%Value $17.28MPrice $263.27Shares 58KSince Jun 30 -11.62%
Weight 1.1%Value $17.18MPrice $69.70Shares 169K +96.51%Since Jun 30 -31.43%
Weight 1.1%Value $16.91MPrice $453.48Shares 26K -29.80%Since Jun 30 -29.00%
Weight 1.1%Value $16.48MPrice $204.48Shares 88KSince Jun 30 +9.18%
Weight 1.1%Value $16.27MPrice $228.07Shares 61KSince Jun 30 -14.49%
Weight 1.1%Value $16.08MPrice $87.16Shares 165K +28.11%Since Jun 30 -10.59%
Weight 1.0%Value $15.42MPrice $186.14Shares 63KSince Jun 30 -23.95%
Weight 1.0%Value $14.91MPrice $39.81Shares 440K -7.76%Since Jun 30 +17.50%
Weight 1.0%Value $14.77MPrice $210.23Shares 36K -38.41%Since Jun 30 -49.47%
Weight 0.9%Value $13.40MPrice $182.44Shares 88KSince Jun 30 +19.81%
Weight 0.8%Value $12.85MPrice $70.30Shares 180KSince Jun 30 -1.54%
Weight 0.8%Value $12.12MPrice $533.85Shares 16K +23.08%Since Jun 30 -29.55%
Weight 0.8%Value $11.93MPrice $110.51Shares 104KSince Jun 30 -3.63%
Weight 0.7%Value $11.18MPrice $651.43Shares 15K +1.32%Since Jun 30 -12.63%
Weight 0.7%Value $11.11MPrice $186.13Shares 108KSince Jun 30 +80.92%
| Stock | Weight | Value | Since Jun 30 | Shares change | Action |
|---|---|---|---|---|---|
| 14.7% | $223.02M | -25.83% | — | Hold | |
| 5.1% | $77.07M | -5.34% | +49.28% | Add | |
| 3.6% | $55.48M | +4.59% | — | New | |
| 3.2% | $49.30M | -1.23% | — | Hold | |
| 2.4% | $36.86M | -16.97% | — | New | |
| 2.2% | $33.64M | -11.44% | +82.09% | Add | |
| 1.8% | $27.16M | +18.46% | +98.90% | Add | |
| 1.6% | $23.92M | -27.65% | +11.72% | Add | |
| 1.5% | $22.75M | +3.65% | — | Hold | |
| 1.2% | $17.69M | -52.17% | — | New | |
| 1.1% | $17.28M | -11.62% | — | New | |
| 1.1% | $17.18M | -31.43% | +96.51% | Add | |
| 1.1% | $16.91M | -29.00% | -29.80% | Trim | |
| 1.1% | $16.48M | +9.18% | — | New | |
| 1.1% | $16.27M | -14.49% | — | New | |
| 1.1% | $16.08M | -10.59% | +28.11% | Add | |
| 1.0% | $15.42M | -23.95% | — | New | |
| 1.0% | $14.91M | +17.50% | -7.76% | Trim | |
| 1.0% | $14.77M | -49.47% | -38.41% | Trim | |
| 0.9% | $13.40M | +19.81% | — | New | |
| 0.8% | $12.85M | -1.54% | — | Hold | |
| 0.8% | $12.12M | -29.55% | +23.08% | Add | |
| 0.8% | $11.93M | -3.63% | — | New | |
| 0.7% | $11.18M | -12.63% | +1.32% | Add | |
| 0.7% | $11.11M | +80.92% | — | New |
Weight is the share of the reported 13F value, including options at notional value. “Since Jun 30” compares the latest close with the quarter-end price implied by the filing (value ÷ shares).
Largest buys in 2026 Q2
Largest sells in 2026 Q2
Options
Notional value, listed apart from stocks · top 10 of 19
Source: SEC Form 13F, values as reported by the filer. Filings lag up to 45 days after quarter end and cover only certain long positions. Research only, not investment advice.