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THOMPSON INVESTMENT MANAGEMENT, INC.: AMT position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of THOMPSON INVESTMENT MANAGEMENT, INC. on AMT, newest first. How the timeline and the estimate are built.

THOMPSON INVESTMENT MANAGEMENT, INC. held 20,722 AMT shares at 2026-09-30 per its 13F-HR filed 2026-10-14.

the latest 13F is the newest step

  1. period ended2026-09-30
    13F 20,722 shares
    Change vs previous 13F +339 shares

    0.39% of the 13F portfolio, value $3,391,984.

    13F-HR 0001277279-26-000008 filed by THOMPSON INVESTMENT MANAGEMENT, INC.
    Accepted , ingested

  2. period ended2026-06-30
    13F 20,383 shares
    Change vs previous 13F +386 shares

    0.38% of the 13F portfolio, value $3,334,047.

    13F-HR 0001277279-26-000006 filed by THOMPSON INVESTMENT MANAGEMENT, INC.
    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 19,997 shares
    Change vs previous 13F +3,457 shares

    0.45% of the 13F portfolio, value $3,451,082.

    13F-HR 0001277279-26-000004 filed by THOMPSON INVESTMENT MANAGEMENT, INC.
    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 16,540 shares
    Change vs previous 13F +1,339 shares

    0.36% of the 13F portfolio, value $2,903,928.

    13F-HR 0001277279-26-000002 filed by THOMPSON INVESTMENT MANAGEMENT, INC.
    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 15,201 shares
    Change vs previous 13F +440 shares

    0.39% of the 13F portfolio, value $2,923,456.

    13F-HR 0001277279-25-000008 filed by THOMPSON INVESTMENT MANAGEMENT, INC.
    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 14,761 shares
    Change vs previous 13F +284 shares

    0.46% of the 13F portfolio, value $3,262,476.

    13F-HR 0001277279-25-000006 filed by THOMPSON INVESTMENT MANAGEMENT, INC.
    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 14,477 shares
    Change vs previous 13F not available

    0.47% of the 13F portfolio, value $3,150,195.

    13F-HR 0001277279-25-000004 filed by THOMPSON INVESTMENT MANAGEMENT, INC.
    Filed (acceptance time not in the bulk data set), ingested

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