Atika Capital Management LLC

Q4 2025 13F-HR Holdings

Location
New York, NY
Holdings as of
12/31/2025
Date filed
2/13/2026
Form type
13F-HR
Num holdings
77
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 aggregated across other managers listed in the original SEC filing. View detailed breakdown

Prev filing: 11/13/2025 Next filing: — SEC filing

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