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Disclosery

Atika Capital Management LLC: STX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Atika Capital Management LLC on STX, newest first. How the timeline and the estimate are built.

Atika Capital Management LLC held 79,865 STX shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 79,865 shares
    Change vs previous 13F +26,365 shares

    7.65% of the 13F portfolio, value $77,069,725.

    13F-HR 0001214659-26-010035 filed by Atika Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 53,500 shares
    Change vs previous 13F +1,593 shares

    3.31% of the 13F portfolio, value $20,959,160.

    13F-HR 0001214659-26-006119 filed by Atika Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 51,907 shares
    Change vs previous 13F -66,189 shares

    1.99% of the 13F portfolio, value $14,294,669.

    13F-HR 0001214659-26-001658 filed by Atika Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 118,096 shares
    Change vs previous 13F not available

    2.37% of the 13F portfolio, value $27,877,742.

    13F-HR 0001214659-25-016379 filed by Atika Capital Management LLC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).