Atika Capital Management LLC

Q4 2025 13F-HR Detailed Holdings

Location
New York, NY
Holdings as of
12/31/2025
Date filed
2/13/2026
Form type
13F-HR
Num holdings
231
Total value ($000)
$949,829
Net value change ($000)
-291,921 (-23.5%)
New positions
26
Sold out positions
38
Turnover %
102.1%
Sector allocation + QoQ delta (equities-only)

Holdings broken out by other managers reported in the original SEC filing. View aggregated holdings

You are on the SEC detailed breakdown page. Rows are shown as reported in the filing (including other manager, discretion, and voting authority fields), and are not merged like the standard holdings view. Switch to aggregated holdings.

Snapshot: Change Analysis

Compared to Q3 2025
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
MDGL 19,800 NEW
COGT 17,973 NEW
TEVA 17,853 394.5%
GOOGL 13,242 NEW
TERN 12,975 NEW
LLY 12,810 40.8%
VRT 10,563 11.4%
MDB 9,370 NEW
HEI 8,510 NEW
SATS 8,297 157.5%
Top Reduces (Value $000, Stocks/ETFs)
MSFT -85,462 -100.0%
AMZN -68,714 -78.8%
SPOT -43,883 -100.0%
MLM -43,163 -100.0%
ANET -33,689 -100.0%
CEG -31,196 -100.0%
GEV -26,096 -100.0%
META -26,070 -100.0%
VST -24,098 -100.0%
CYBR -21,672 -100.0%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 231,682 (24.4% of total reported value)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type Discretion Other Manager Sole Shared None

Other Managers

Num Name File Number
1 Atika Capital Partners LP 028-16711
2 Optika Master Portfolio Ltd 028-20128