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Disclosery

ALLIANCEBERNSTEIN L.P.: AMSC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ALLIANCEBERNSTEIN L.P. on AMSC, newest first. How the timeline and the estimate are built.

ALLIANCEBERNSTEIN L.P. held 54,720 AMSC shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 54,720 shares
    Change vs previous 13F +10,300 shares

    <0.01% of the 13F portfolio, value $1,852,272.

    13F-HR 0001109448-26-000261 filed by ALLIANCEBERNSTEIN L.P.
    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 44,420 shares
    Change vs previous 13F +5,100 shares

    <0.01% of the 13F portfolio, value $1,278,408.

    13F-HR 0001109448-26-000101 filed by ALLIANCEBERNSTEIN L.P.
    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 39,320 shares
    Change vs previous 13F 0 shares

    <0.01% of the 13F portfolio, value $1,131,630.

    13F-HR 0001109448-26-000021 filed by ALLIANCEBERNSTEIN L.P.
    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 39,320 shares
    Change vs previous 13F +3,600 shares

    <0.01% of the 13F portfolio, value $2,335,215.

    13F-HR 0001109448-25-000079 filed by ALLIANCEBERNSTEIN L.P.
    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 35,720 shares
    Change vs previous 13F 0 shares

    <0.01% of the 13F portfolio, value $1,310,567.

    13F-HR 0001532155-25-000161 filed by ALLIANCEBERNSTEIN L.P.
    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 35,720 shares
    Change vs previous 13F 0 shares

    <0.01% of the 13F portfolio, value $647,961.

    13F-HR 0001532155-25-000116 filed by ALLIANCEBERNSTEIN L.P.
    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 35,720 shares
    Change vs previous 13F 0 shares

    <0.01% of the 13F portfolio, value $879,784.

    13F-HR 0001532155-25-000050 filed by ALLIANCEBERNSTEIN L.P.
    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 35,720 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $842,992.

    13F-HR 0001532155-24-000162 filed by ALLIANCEBERNSTEIN L.P.
    Filed (acceptance time not in the bulk data set), ingested

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