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PRIMECAP MANAGEMENT CO/CA/: MAT position timeline

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

PRIMECAP MANAGEMENT CO/CA/ held 29,505,735 MAT 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 29,505,735 shares
    Change vs previous 13F -192,189 shares

    0.24% of the 13F portfolio, value $409,539,602.

    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 29,697,924 shares
    Change vs previous 13F -106,151 shares

    0.34% of the 13F portfolio, value $431,510,852.

    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 29,804,075 shares
    Change vs previous 13F -1,550,072 shares

    0.45% of the 13F portfolio, value $591,312,849.

    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 31,354,147 shares
    Change vs previous 13F -1,864,114 shares

    0.4% of the 13F portfolio, value $527,690,294.

    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 33,218,261 shares
    Change vs previous 13F -1,932,410 shares

    0.52% of the 13F portfolio, value $655,064,106.

    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 35,150,671 shares
    Change vs previous 13F -1,361,410 shares

    0.56% of the 13F portfolio, value $682,977,540.

    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 36,512,081 shares
    Change vs previous 13F -1,379,020 shares

    0.5% of the 13F portfolio, value $647,359,197.

    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 37,891,101 shares
    Change vs previous 13F not available

    0.53% of the 13F portfolio, value $721,825,477.

    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).