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THOMPSON SIEGEL & WALMSLEY LLC: AMTM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of THOMPSON SIEGEL & WALMSLEY LLC on AMTM, newest first. How the timeline and the estimate are built.

THOMPSON SIEGEL & WALMSLEY LLC held 2,281,945 AMTM 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 2,281,945 shares
    Change vs previous 13F +756,061 shares

    0.85% of the 13F portfolio, value $47,168,000.

    13F-HR 0001008322-26-000009 filed by THOMPSON SIEGEL & WALMSLEY LLC
    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 1,525,884 shares
    Change vs previous 13F -395,925 shares

    0.7% of the 13F portfolio, value $39,795,000.

    13F-HR 0001008322-26-000006 filed by THOMPSON SIEGEL & WALMSLEY LLC
    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 1,921,809 shares
    Change vs previous 13F -808,489 shares

    0.94% of the 13F portfolio, value $55,732,000.

    13F-HR 0001008322-26-000003 filed by THOMPSON SIEGEL & WALMSLEY LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-09-30
    13F 2,730,298 shares
    Change vs previous 13F -56,615 shares

    1.06% of the 13F portfolio, value $65,391,000.

    13F-HR 0001008322-25-000017 filed by THOMPSON SIEGEL & WALMSLEY LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-06-30
    13F 2,786,913 shares
    Change vs previous 13F -539,465 shares

    1.11% of the 13F portfolio, value $65,799,000.

    13F-HR 0001008322-25-000011 filed by THOMPSON SIEGEL & WALMSLEY LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2025-03-31
    13F 3,326,378 shares
    Change vs previous 13F +1,377,694 shares

    1.03% of the 13F portfolio, value $60,540,000.

    13F-HR 0001008322-25-000008 filed by THOMPSON SIEGEL & WALMSLEY LLC
    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 1,948,684 shares
    Change vs previous 13F +1,606,442 shares

    0.64% of the 13F portfolio, value $40,981,000.

    13F-HR 0001008322-25-000003 filed by THOMPSON SIEGEL & WALMSLEY LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  8. period ended2024-09-30
    13F 342,242 shares
    Change vs previous 13F not available

    0.17% of the 13F portfolio, value $11,037,000.

    13F-HR 0001008322-24-000016 filed by THOMPSON SIEGEL & WALMSLEY LLC
    Filed (acceptance time not in the bulk data set), ingested

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