Atika Capital Management LLC

Q3 2025 13F-HR Detailed Holdings

Location
New York, NY
Holdings as of
9/30/2025
Date filed
11/13/2025
Form type
13F-HR
Num holdings
258
Total value ($000)
$1,241,750
Net value change ($000)
+241,751 (24.2%)
New positions
27
Sold out positions
8
Turnover %
17.7%
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 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)
STX 27,878 NEW
NBIS 16,350 425.2%
CDTX 15,065 NEW
TSLA 13,786 NEW
VRT 13,764 17.5%
INSM 13,681 NEW
TLN 12,091 69.5%
CIEN 11,654 NEW
BWXT 9,772 32.2%
ROKU 9,397 239.7%
Top Reduces (Value $000, Stocks/ETFs)
GKOS -15,680 -47.5%
SLNO -10,095 -100.0%
MELI -7,604 -29.1%
TW -7,320 -100.0%
INSP -7,090 -33.7%
WWD -7,010 -100.0%
ISRG -6,789 -21.0%
TKO -4,767 -100.0%
SN -4,338 -51.3%
SPOT -4,091 -8.5%
Instrument mix + QoQ Δ (ex-options)
Derivatives reported exposure ($000): 67,876 (5.5% 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