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WELLINGTON MANAGEMENT GROUP LLP: ACM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of WELLINGTON MANAGEMENT GROUP LLP on ACM, newest first. How the timeline and the estimate are built.

WELLINGTON MANAGEMENT GROUP LLP held 61,157 ACM 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 61,157 shares
    Change vs previous 13F +34,194 shares

    <0.01% of the 13F portfolio, value $4,268,759.

    13F-HR 0000902219-26-000311 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 26,963 shares
    Change vs previous 13F +7,872 shares

    <0.01% of the 13F portfolio, value $2,287,002.

    13F-HR 0000902219-26-000209 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 19,091 shares
    Change vs previous 13F +1,446 shares

    <0.01% of the 13F portfolio, value $1,819,945.

    13F-HR 0000902219-26-000103 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 17,645 shares
    Change vs previous 13F +1,546 shares

    <0.01% of the 13F portfolio, value $2,302,143.

    13F-HR 0000902219-25-000462 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 16,099 shares
    Change vs previous 13F +43 shares

    <0.01% of the 13F portfolio, value $1,816,933.

    13F-HR 0000902219-25-000356 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 16,056 shares
    Change vs previous 13F +3,454 shares

    <0.01% of the 13F portfolio, value $1,488,873.

    13F-HR 0000902219-25-000242 filed by WELLINGTON MANAGEMENT GROUP LLP
    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/A 12,602 shares
    Change vs previous 13F +603 shares

    <0.01% of the 13F portfolio, value $1,346,146.

    13F-HR 0000902219-25-000131 filed by WELLINGTON MANAGEMENT GROUP LLP
    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 11,999 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $1,239,136.

    13F-HR 0000902219-24-000498 filed by WELLINGTON MANAGEMENT GROUP LLP
    Filed (acceptance time not in the bulk data set), ingested

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