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PRIMECAP MANAGEMENT CO/CA/: GSK position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 25,182,068 GSK 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 25,182,068 shares
    Change vs previous 13F -22,470 shares

    0.78% of the 13F portfolio, value $1,320,044,006.

    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 25,204,538 shares
    Change vs previous 13F +74,378 shares

    1.1% of the 13F portfolio, value $1,391,038,453.

    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 25,130,160 shares
    Change vs previous 13F -636,790 shares

    0.93% of the 13F portfolio, value $1,232,383,047.

    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 25,766,950 shares
    Change vs previous 13F -1,959,830 shares

    0.85% of the 13F portfolio, value $1,112,101,562.

    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 27,726,780 shares
    Change vs previous 13F +2,018,760 shares

    0.84% of the 13F portfolio, value $1,064,708,352.

    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 25,708,020 shares
    Change vs previous 13F +446,360 shares

    0.82% of the 13F portfolio, value $995,928,693.

    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 25,261,660 shares
    Change vs previous 13F +10,407,905 shares

    0.66% of the 13F portfolio, value $854,349,340.

    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 14,853,755 shares
    Change vs previous 13F not available

    0.45% of the 13F portfolio, value $607,221,502.

    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).