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Disclosery

PRIMECAP MANAGEMENT CO/CA/: WSC position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 4,253,900 WSC 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 4,253,900 shares
    Change vs previous 13F -23,500 shares

    0.07% of the 13F portfolio, value $122,767,554.

    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 4,277,400 shares
    Change vs previous 13F +10,000 shares

    0.06% of the 13F portfolio, value $74,255,664.

    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 4,267,400 shares
    Change vs previous 13F +2,894,900 shares

    0.06% of the 13F portfolio, value $80,355,142.

    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 1,372,500 shares
    Change vs previous 13F +328,700 shares

    0.02% of the 13F portfolio, value $28,973,475.

    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 1,043,800 shares
    Change vs previous 13F +27,000 shares

    0.02% of the 13F portfolio, value $28,600,120.

    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 1,016,800 shares
    Change vs previous 13F +143,300 shares

    0.02% of the 13F portfolio, value $28,267,040.

    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 873,500 shares
    Change vs previous 13F -5,000 shares

    0.02% of the 13F portfolio, value $29,218,575.

    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 878,500 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $33,031,600.

    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).