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Atika Capital Management LLC

Institutional InvestorSimilar funds →SEC EDGAR: CIK 1599731
Institutional-grade research for retail investors

Sector Allocation

  • Technology54.6%$550.1M
  • Healthcare28.9%$291.5M
  • Communication Services4.7%$47.1M
  • Consumer Discretionary4.4%$44.4M
  • Industrials4.0%$39.8M
  • Energy1.5%$14.8M
  • Consumer Staples1.0%$10.4M
  • Financials1.0%$9.7M

AUM History

13fpro.ai/research/fund/atika-capital-management-llc-1599731

Conviction and streaks

Stable · top 10 = 56.3%

From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.

VRT$VRTConviction hold22.1% weight · held 10 quartersSTX$STXConviction hold7.7% weight · held 4 quartersLLY$LLYConviction hold4.9% weight · held 10 quartersECHO$ECHOConviction hold3.3% weight · held 7 quartersGH$GHConviction hold2.7% weight · held 6 quartersECHO$ECHOAccumulating+1269% shares · 4 quarters runningAXSM$AXSMAccumulating+37% shares · 3 quarters runningSTX$STXAccumulating+54% shares · 2 quarters runningRKLB$RKLBAccumulating+172% shares · 2 quarters runningSN$SNAccumulating+120% shares · 2 quarters runningABVX$ABVXTrimming-84% shares · 6 quarters runningBWXT$BWXTTrimming-75% shares · 3 quarters runningMRVL$MRVLTrimming-42% shares · 2 quarters runningTEVA$TEVATrimming-39% shares · 2 quarters runningCOGT$COGTTrimming-46% shares · 2 quarters running

Largest positions — Q2 2026

Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.

13fpro.ai/research/fund/atika-capital-management-llc-1599731

Atika Capital Management LLC 13F holdings — Q2 2026

$1.5B portfolio (+91.0% QoQ) · 81 holdings · Q2 2026 13F · top 10 are 56% of the stock portfolio

Includes $513.7M of put/call options ($349.6M puts, $164.1M calls), which 13F rules report at the value of the underlying shares, not the premium at risk. Stocks alone: $1.0B. Weights use the stock portfolio.

All holdings — Atika Capital Management LLC (Q2 2026)

81 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.

Company
— PUTSPDR SERIES TRUST - ST STR SP BIOT$89.0M+33%
QQQ$QQQPUTINVESCO QQQ TRUST, SERIES 1$73.6MNew
GEV$GEVPUTGE Vernova Inc.$58.7MNew
AMZN$AMZNCALLAMAZON COM INC$52.9MNew
QQQ$QQQCALLINVESCO QQQ TRUST, SERIES 1$48.6MNew
MU$MUPUTMICRON TECHNOLOGY INC$34.6MNew
— PUTVANECK ETF TRUST - SEMICONDUCTR ETF$33.5M-29%
— PUTISHARES TR - EXPANDED TECH$24.6MNew
BTI$BTICALLBritish American Tobacco p.l.c.$20.4MNew
IBIT$IBITPUTiShares Bitcoin Trust ETF$20.0MNew
MRVL$MRVLMarvell Technology, Inc.$17.3MNew
RKLB$RKLBRocket Lab Corp$17.2M+97%
WDC$WDCWESTERN DIGITAL CORP$16.9M-30%
RVMD$RVMDRevolution Medicines, Inc.$16.5MNew
ASND$ASNDAscendis Pharma A/S$16.3M+219%

What changed in Q2 2026

Against the previous quarter's 13F: 44 new, 15 added to, 13 trimmed, 23 sold out. Share-count changes; largest moves by dollar size first.

New positions (44)

  • QQQ$QQQPUTINVESCO QQQ TRUST, SERIES 1$73.6M

    first bought this quarter

  • GEV$GEVPUTGE Vernova Inc.$58.7M

    first bought this quarter

  • AMD$AMDADVANCED MICRO DEVICES INC$55.5M

    first bought this quarter

  • AMZN$AMZNCALLAMAZON COM INC$52.9M

    first bought this quarter

  • QQQ$QQQCALLINVESCO QQQ TRUST, SERIES 1$48.6M

    first bought this quarter

  • INTC$INTCINTEL CORP$36.9M

    first bought this quarter

+38 more in the Excel export

Added to (15)

  • STX$STXSeagate Technology Holdings plc+49%

    now $77.1M · held 4 qtrs, 2 adds in a row

  • PUTSPDR SERIES TRUST - ST STR SP BIOT+33%

    now $89.0M

  • ECHO$ECHOEchoStar CORP+82%

    now $33.6M · held 6+ qtrs, 4 adds in a row

  • GH$GHGuardant Health, Inc.+99%

    now $27.2M · held 6+ qtrs

  • ASND$ASNDAscendis Pharma A/S+219%

    now $16.3M · held 6+ qtrs

  • RKLB$RKLBRocket Lab Corp+97%

    now $17.2M · held 3 qtrs, 3 adds in a row

+9 more in the Excel export

Trimmed (13)

  • PUTVANECK ETF TRUST - SEMICONDUCTR ETF-29%

    now $33.5M

  • ORKA$ORKAOruka Therapeutics, Inc.-57%

    now $9.5M · held 2 qtrs

  • MTZ$MTZMASTEC INC-38%

    now $14.8M · held 5 qtrs

  • ECHO$ECHOCALLEchoStar CORP-55%

    now $7.2M

  • TTMI$TTMITTM TECHNOLOGIES INC-46%

    now $9.4M · held 3 qtrs, 2 trims in a row

  • WDC$WDCWESTERN DIGITAL CORP-30%

    now $16.9M · held 2 qtrs

+7 more in the Excel export

Sold out (23)

  • PUTISHARES TRwas $24.8M
  • NFLX$NFLXCALLNETFLIX INCwas $15.9M
  • TERN$TERNTerns Pharmaceuticals, Inc.was $15.8M

    held 2 qtrs

  • CALLVANECK ETF TRUSTwas $13.8M
  • NET$NETCloudflare, Inc.was $13.4M

    held 9+ qtrs

  • GOOG$GOOGAlphabet Inc.was $12.4M

    held 2 qtrs

+17 more in the Excel export

Firm AUM (Form ADV): $887.3M as of 2025-12-31 · SEC IAPD

Share

Holdings by quarter

Every 13F Atika Capital Management LLC has filed, 41 earlier quarters. Pick one to see what it held then.

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Is it too late to follow Atika Capital Management?

Q2 2026 13F filed with the SEC on Aug 13, 2026. Prices are closing prices as of Oct 26, 2026.

Average quality of Atika Capital Management's top 20 holdings: 67/100 (our AI quality score, weighted by position size; 17 of the 20 are scored)

Top 10 since filing

-16.3%

Value-weighted move of the 10 largest stock positions

Turnover

20%

Last quarter; 68% over the last 4

Top 10 weight

56%

Share of the stock portfolio in its 10 largest positions

Held 4+ quarters

61%

Share of portfolio value in positions held a year or more

Highest-quality names it owns(among its 100 largest positions)

The 8 highest-scoring companies in this portfolio are a Pro feature.

How these are measured
  • Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
  • Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
  • Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q1 2025 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
  • Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
  • Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.

Portfolio Overview

Atika Capital Management LLC disclosed 81 positions worth $1.5B in its Form 13F-HR for Q2 2026 — $1.0B in common stock plus $513.7M of put/call option positions (reported at underlying notional value, not premium at risk), led by $VRT (Vertiv Holdings Co) at 22.1% of the equity portfolio, followed by $STX and $AMD. During the quarter the fund opened 44 new positions and exited 23 — including a new stake in $QQQ. The portfolio is most concentrated in Technology (54.6% of disclosed assets). All figures are sourced directly from Atika Capital Management LLC’s Form 13F-HR filing with the SEC under CIK 1599731.

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AI-Powered Hedge Fund Analysis: Atika Capital Management LLC

13F Pro is an AI hedge fund tracker and stock research platform. For Atika Capital Management LLC (SEC CIK: 1599731), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.

Every holding in Atika Capital Management LLC's portfolio is scored on an AI quality ranking built from its SEC filings (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.