Atika Capital Management LLC

Q3 2026 13F-HR Holdings

Location
New York, NY
Holdings as of
9/30/2026
Date filed
11/13/2026
Form type
13F-HR
Num holdings
87
Total value ($000)
$1,233,156
Net value change ($000)
-288,321 (-19.0%)
New positions
34
Sold out positions
26
Turnover %
40.9%
Sector allocation + QoQ delta (equities-only)

Holdings aggregated across other managers listed in the original SEC filing. View detailed breakdown

Prev filing: 8/13/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q2 2026
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)
AMD 26,254 47.3%
SITM 21,419 191.5%
META 16,317 NEW
TXG 14,458 NEW
SHOP 14,014 NEW
TSM 12,773 NEW
ISRG 12,711 55.9%
HOOD 12,150 NEW
TEVA 11,484 NEW
AMZN 10,691 101.9%
Top Reduces (Value $000, Stocks/ETFs)
VRT -62,287 -27.9%
MRVL -17,278 -100.0%
WDC -16,911 -100.0%
Ascendis Pharma AS -16,270 -100.0%
AXSM -15,421 -100.0%
TEVA -14,907 -100.0%
AXGN -10,208 -100.0%
NOK -9,960 -100.0%
ORKA -9,517 -100.0%
VPG -9,469 -53.5%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 210,646 (17.1% 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