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PRIMECAP MANAGEMENT CO/CA/: GKOS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of PRIMECAP MANAGEMENT CO/CA/ on GKOS, newest first. How the timeline and the estimate are built.

PRIMECAP MANAGEMENT CO/CA/ held 3,040,705 GKOS shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 3,040,705 shares
    Change vs previous 13F -329,923 shares

    0.25% of the 13F portfolio, value $424,968,931.

    13F-HR 0000763212-26-000028 filed by PRIMECAP MANAGEMENT CO/CA/
    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 3,370,628 shares
    Change vs previous 13F -6,300 shares

    0.29% of the 13F portfolio, value $362,881,812.

    13F-HR 0000763212-26-000016 filed by PRIMECAP MANAGEMENT CO/CA/
    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 3,376,928 shares
    Change vs previous 13F +1,123,140 shares

    0.29% of the 13F portfolio, value $381,288,942.

    13F-HR 0000763212-26-000012 filed by PRIMECAP MANAGEMENT CO/CA/
    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 2,253,788 shares
    Change vs previous 13F +425,790 shares

    0.14% of the 13F portfolio, value $183,796,416.

    13F-HR 0000763212-25-000005 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-06-30
    13F 1,827,998 shares
    Change vs previous 13F +609,523 shares

    0.15% of the 13F portfolio, value $188,813,915.

    13F-HR 0001085146-25-004804 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-03-31
    13F 1,218,475 shares
    Change vs previous 13F +4,150 shares

    0.1% of the 13F portfolio, value $119,922,310.

    13F-HR 0001085146-25-002901 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-12-31
    13F 1,214,325 shares
    Change vs previous 13F -30,860 shares

    0.14% of the 13F portfolio, value $182,075,891.

    13F-HR 0001085146-25-000946 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 1,245,185 shares
    Change vs previous 13F not available

    0.12% of the 13F portfolio, value $162,222,702.

    13F-HR 0001085146-24-005460 filed by PRIMECAP MANAGEMENT CO/CA/
    Filed (acceptance time not in the bulk data set), ingested

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