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Impax Asset Management Group plc: ACM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Impax Asset Management Group plc on ACM, newest first. How the timeline and the estimate are built.

Impax Asset Management Group plc held 2,128,339 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 2,128,339 shares
    Change vs previous 13F +745,672 shares

    0.97% of the 13F portfolio, value $148,558,062.

    13F-HR 0001749768-26-000004 filed by Impax Asset Management Group plc
    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 1,382,667 shares
    Change vs previous 13F -9,425 shares

    0.82% of the 13F portfolio, value $117,277,815.

    13F-HR 0001749768-26-000002 filed by Impax Asset Management Group plc
    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 1,392,092 shares
    Change vs previous 13F -9,981 shares

    0.83% of the 13F portfolio, value $132,708,130.

    13F-HR 0001749768-26-000001 filed by Impax Asset Management Group plc
    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 1,402,073 shares
    Change vs previous 13F -114,750 shares

    1.07% of the 13F portfolio, value $182,928,464.

    13F-HR 0001749768-25-000052 filed by Impax Asset Management Group plc
    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 1,516,823 shares
    Change vs previous 13F +13,453 shares

    0.98% of the 13F portfolio, value $171,188,644.

    13F-HR 0001749768-25-000049 filed by Impax Asset Management Group plc
    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 1,503,370 shares
    Change vs previous 13F -33,806 shares

    0.84% of the 13F portfolio, value $139,407,500.

    13F-HR 0001749768-25-000042 filed by Impax Asset Management Group plc
    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 1,537,176 shares
    Change vs previous 13F -191,198 shares

    0.74% of the 13F portfolio, value $164,201,140.

    13F-HR 0001749768-25-000039 filed by Impax Asset Management Group plc
    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/A 1,728,374 shares
    Change vs previous 13F not available

    0.7% of the 13F portfolio, value $178,489,183.

    13F-HR/A 0001749768-24-000024 filed by Impax Asset Management Group plc
    Filed (acceptance time not in the bulk data set), ingested

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