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PRIMECAP MANAGEMENT CO/CA/: ONC position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 5,007,931 ONC 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 5,007,931 shares
    Change vs previous 13F +32,750 shares

    0.84% of the 13F portfolio, value $1,427,110,097.

    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 4,975,181 shares
    Change vs previous 13F -5,400 shares

    1.16% of the 13F portfolio, value $1,477,479,502.

    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 4,980,581 shares
    Change vs previous 13F -99,880 shares

    1.15% of the 13F portfolio, value $1,513,150,314.

    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 5,080,461 shares
    Change vs previous 13F -7,818 shares

    1.33% of the 13F portfolio, value $1,730,913,063.

    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 5,088,279 shares
    Change vs previous 13F +32,775 shares

    0.98% of the 13F portfolio, value $1,231,719,699.

    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 5,055,504 shares
    Change vs previous 13F -43,400 shares

    1.14% of the 13F portfolio, value $1,375,956,527.

    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 5,098,904 shares
    Change vs previous 13F +124,615 shares

    0.73% of the 13F portfolio, value $941,818,561.

    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 4,974,289 shares
    Change vs previous 13F not available

    0.82% of the 13F portfolio, value $1,116,777,627.

    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).