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Disclosery

GAMMA Investing LLC: ACM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GAMMA Investing LLC on ACM, newest first. How the timeline and the estimate are built.

GAMMA Investing LLC held 1,378 ACM shares at 2026-09-30 per its 13F-HR filed 2026-10-08.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 1,378 shares
    Change vs previous 13F +821 shares

    <0.01% of the 13F portfolio, value $81,233.

    13F-HR 0002010235-26-000007 filed by GAMMA Investing LLC
    Accepted , ingested

  2. period ended2026-06-30
    13F 557 shares
    Change vs previous 13F -688 shares

    <0.01% of the 13F portfolio, value $38,879.

    13F-HR 0002010235-26-000005 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2026-03-31
    13F 1,245 shares
    Change vs previous 13F -564 shares

    <0.01% of the 13F portfolio, value $105,601.

    13F-HR 0002010235-26-000003 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-12-31
    13F 1,809 shares
    Change vs previous 13F -468 shares

    0.01% of the 13F portfolio, value $172,452.

    13F-HR 0002010235-26-000001 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-09-30
    13F 2,277 shares
    Change vs previous 13F +406 shares

    0.02% of the 13F portfolio, value $297,080.

    13F-HR 0002010235-25-000009 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-06-30
    13F 1,871 shares
    Change vs previous 13F +282 shares

    0.01% of the 13F portfolio, value $211,161.

    13F-HR 0002010235-25-000007 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2025-03-31
    13F/A 1,589 shares
    Change vs previous 13F +61 shares

    0.01% of the 13F portfolio, value $147,348.

    13F-HR/A 0002010235-25-000006 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-12-31
    13F 1,528 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $163,221.

    13F-HR 0002010235-25-000001 filed by GAMMA Investing LLC
    Filed (acceptance time not in the bulk data set), ingested

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