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PRIMECAP MANAGEMENT CO/CA/: MDB position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 846,004 MDB 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 846,004 shares
    Change vs previous 13F +3,275 shares

    0.17% of the 13F portfolio, value $284,172,744.

    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 842,729 shares
    Change vs previous 13F -5,550 shares

    0.16% of the 13F portfolio, value $206,274,777.

    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 848,279 shares
    Change vs previous 13F -141,000 shares

    0.27% of the 13F portfolio, value $356,014,214.

    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 989,279 shares
    Change vs previous 13F -56,440 shares

    0.24% of the 13F portfolio, value $307,052,416.

    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 1,045,719 shares
    Change vs previous 13F +175,169 shares

    0.17% of the 13F portfolio, value $219,590,533.

    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 870,550 shares
    Change vs previous 13F +780,200 shares

    0.13% of the 13F portfolio, value $152,694,470.

    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 90,350 shares
    Change vs previous 13F +20,100 shares

    0.02% of the 13F portfolio, value $21,034,384.

    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 70,250 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $18,992,088.

    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).