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DIMENSIONAL FUND ADVISORS LP: ACM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of DIMENSIONAL FUND ADVISORS LP on ACM, newest first. How the timeline and the estimate are built.

DIMENSIONAL FUND ADVISORS LP held 1,640,760 ACM shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,640,760 shares
    Change vs previous 13F +253,225 shares

    0.02% of the 13F portfolio, value $114,526,869.

    13F-HR 0000354204-26-000866 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,387,535 shares
    Change vs previous 13F +82,903 shares

    0.02% of the 13F portfolio, value $117,680,369.

    13F-HR 0000354204-26-000581 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,304,632 shares
    Change vs previous 13F -6,397 shares

    0.03% of the 13F portfolio, value $124,382,146.

    13F-HR 0000354204-26-000347 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,311,029 shares
    Change vs previous 13F +68,704 shares

    0.04% of the 13F portfolio, value $171,043,136.

    13F-HR 0000354204-25-001337 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,242,325 shares
    Change vs previous 13F -19,061 shares

    0.03% of the 13F portfolio, value $140,211,113.

    13F-HR 0000354204-25-001097 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,261,386 shares
    Change vs previous 13F +55,466 shares

    0.03% of the 13F portfolio, value $116,960,627.

    13F-HR 0000354204-25-000866 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,205,920 shares
    Change vs previous 13F +94,880 shares

    0.03% of the 13F portfolio, value $128,820,383.

    13F-HR 0000354204-25-000528 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,111,040 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $114,737,109.

    13F-HR 0000354204-24-004773 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).