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PRIMECAP MANAGEMENT CO/CA/: CERS position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 781,800 CERS 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 781,800 shares
    Change vs previous 13F -7,500 shares

    <0.01% of the 13F portfolio, value $2,282,856.

    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 789,300 shares
    Change vs previous 13F -5,200 shares

    <0.01% of the 13F portfolio, value $1,436,526.

    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 794,500 shares
    Change vs previous 13F -305,500 shares

    <0.01% of the 13F portfolio, value $1,636,670.

    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 1,100,000 shares
    Change vs previous 13F -215,400 shares

    <0.01% of the 13F portfolio, value $1,749,000.

    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 1,315,400 shares
    Change vs previous 13F -203,800 shares

    <0.01% of the 13F portfolio, value $1,854,714.

    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 1,519,200 shares
    Change vs previous 13F -25,100 shares

    <0.01% of the 13F portfolio, value $2,111,688.

    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 1,544,300 shares
    Change vs previous 13F -6,999,700 shares

    <0.01% of the 13F portfolio, value $2,378,222.

    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 8,544,000 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $14,866,560.

    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).