Atika Capital Management LLC

Q3 2026 13F-HR Detailed Holdings

Location
New York, NY
Holdings as of
9/30/2026
Date filed
11/13/2026
Form type
13F-HR
Num holdings
261
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 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 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 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