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BAILLIE GIFFORD & CO: AMSC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BAILLIE GIFFORD & CO on AMSC, newest first. How the timeline and the estimate are built.

BAILLIE GIFFORD & CO held 933,308 AMSC shares at 2026-06-30 per its 13F-HR filed 2026-08-06.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 933,308 shares
    Change vs previous 13F -514,111 shares

    0.04% of the 13F portfolio, value $38,741,615.

    13F-HR 0001088875-26-000057 filed by BAILLIE GIFFORD & CO
    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 1,447,419 shares
    Change vs previous 13F -59,422 shares

    0.05% of the 13F portfolio, value $48,995,134.

    13F-HR 0001088875-26-000037 filed by BAILLIE GIFFORD & CO
    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 1,506,841 shares
    Change vs previous 13F +79,509 shares

    0.04% of the 13F portfolio, value $43,366,884.

    13F-HR 0001088875-26-000002 filed by BAILLIE GIFFORD & CO
    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 1,427,332 shares
    Change vs previous 13F -25,347 shares

    0.06% of the 13F portfolio, value $84,769,248.

    13F-HR 0001088875-25-000079 filed by BAILLIE GIFFORD & CO
    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 1,452,679 shares
    Change vs previous 13F -66,211 shares

    0.04% of the 13F portfolio, value $53,298,792.

    13F-HR 0001088875-25-000057 filed by BAILLIE GIFFORD & CO
    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 1,518,890 shares
    Change vs previous 13F -130,900 shares

    0.02% of the 13F portfolio, value $27,552,664.

    13F-HR 0001088875-25-000049 filed by BAILLIE GIFFORD & CO
    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 1,649,790 shares
    Change vs previous 13F -456,605 shares

    0.03% of the 13F portfolio, value $40,634,328.

    13F-HR 0001088875-25-000002 filed by BAILLIE GIFFORD & CO
    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 2,106,395 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $49,710,922.

    13F-HR 0001088875-24-000110 filed by BAILLIE GIFFORD & CO
    Filed (acceptance time not in the bulk data set), ingested

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