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GW&K Investment Management, LLC: ATRC position timeline

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

GW&K Investment Management, LLC held 949,516 ATRC 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 949,516 shares
    Change vs previous 13F -13,899 shares

    0.21% of the 13F portfolio, value $26,567,000.

    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 963,415 shares
    Change vs previous 13F +11,326 shares

    0.24% of the 13F portfolio, value $27,486,000.

    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 952,089 shares
    Change vs previous 13F +91,054 shares

    0.33% of the 13F portfolio, value $37,665,000.

    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 861,035 shares
    Change vs previous 13F -147,305 shares

    0.27% of the 13F portfolio, value $30,352,000.

    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 1,008,340 shares
    Change vs previous 13F +26,817 shares

    0.3% of the 13F portfolio, value $33,043,000.

    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 981,523 shares
    Change vs previous 13F -18,982 shares

    0.29% of the 13F portfolio, value $31,664,000.

    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 1,000,505 shares
    Change vs previous 13F -18,513 shares

    0.26% of the 13F portfolio, value $30,575,000.

    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 1,019,018 shares
    Change vs previous 13F not available

    0.24% of the 13F portfolio, value $28,573,000.

    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).