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PRIMECAP MANAGEMENT CO/CA/: ACLS position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 610,451 ACLS 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 610,451 shares
    Change vs previous 13F -48,201 shares

    0.07% of the 13F portfolio, value $115,649,942.

    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 658,652 shares
    Change vs previous 13F -6,290 shares

    0.05% of the 13F portfolio, value $61,307,328.

    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 664,942 shares
    Change vs previous 13F -168,734 shares

    0.04% of the 13F portfolio, value $53,421,440.

    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 833,676 shares
    Change vs previous 13F -18,620 shares

    0.06% of the 13F portfolio, value $81,400,125.

    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 852,296 shares
    Change vs previous 13F +17,230 shares

    0.05% of the 13F portfolio, value $59,396,508.

    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 835,066 shares
    Change vs previous 13F -81,360 shares

    0.03% of the 13F portfolio, value $41,477,728.

    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 916,426 shares
    Change vs previous 13F -58,010 shares

    0.05% of the 13F portfolio, value $64,030,685.

    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 974,436 shares
    Change vs previous 13F not available

    0.08% of the 13F portfolio, value $102,169,615.

    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).