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GW&K Investment Management, LLC: MTSI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of GW&K Investment Management, LLC on MTSI, newest first. How the timeline and the estimate are built.

GW&K Investment Management, LLC held 634,742 MTSI shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 634,742 shares
    Change vs previous 13F -204,320 shares

    1.89% of the 13F portfolio, value $241,439,000.

    13F-HR 0001082917-26-000003 filed by GW&K Investment Management, 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 839,062 shares
    Change vs previous 13F -378,873 shares

    1.64% of the 13F portfolio, value $186,332,000.

    13F-HR 0001082917-26-000002 filed by GW&K Investment Management, 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 1,217,935 shares
    Change vs previous 13F +70,167 shares

    1.8% of the 13F portfolio, value $208,609,000.

    13F-HR 0001082917-26-000001 filed by GW&K Investment Management, 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 1,147,768 shares
    Change vs previous 13F -76,229 shares

    1.26% of the 13F portfolio, value $142,886,000.

    13F-HR 0001082917-25-000007 filed by GW&K Investment Management, 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 1,223,997 shares
    Change vs previous 13F -51,051 shares

    1.57% of the 13F portfolio, value $175,388,000.

    13F-HR 0001082917-25-000004 filed by GW&K Investment Management, 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 1,275,048 shares
    Change vs previous 13F +114,780 shares

    1.19% of the 13F portfolio, value $127,990,000.

    13F-HR 0001082917-25-000003 filed by GW&K Investment Management, 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 1,160,268 shares
    Change vs previous 13F -8,844 shares

    1.28% of the 13F portfolio, value $150,731,000.

    13F-HR 0001082917-25-000001 filed by GW&K Investment Management, 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 1,169,112 shares
    Change vs previous 13F not available

    1.11% of the 13F portfolio, value $130,075,000.

    13F-HR 0001082917-24-000006 filed by GW&K Investment Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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