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Stephens Investment Management Group LLC: AMSC position timeline

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

Stephens Investment Management Group LLC held 408,212 AMSC shares at 2026-06-30 per its 13F-HR filed 2026-07-29.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 408,212 shares
    Change vs previous 13F +99,697 shares

    0.09% of the 13F portfolio, value $16,944,881.

    13F-HR 0001314440-26-000010 filed by Stephens Investment Management Group LLC
    Filed (acceptance time not in the bulk data set), ingested

    • STEPHENS INC /AR/: 5,450 shares
    • Stephens Investment Management Group LLC: 402,762 shares

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

  2. period ended2026-03-31
    13F 308,515 shares
    Change vs previous 13F +134,287 shares

    0.14% of the 13F portfolio, value $10,443,233.

    13F-HR 0001314440-26-000006 filed by Stephens Investment Management Group 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 174,228 shares
    Change vs previous 13F +97,817 shares

    0.07% of the 13F portfolio, value $5,014,282.

    13F-HR 0001314440-26-000003 filed by Stephens Investment Management Group LLC
    Filed (acceptance time not in the bulk data set), ingested

    • STEPHENS INC /AR/: 0 shares
    • Stephens Investment Management Group LLC: 174,228 shares

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

  4. period ended2025-09-30
    13F 76,411 shares
    Change vs previous 13F +68,411 shares

    0.03% of the 13F portfolio, value $4,538,049.

    13F-HR 0001314440-25-000016 filed by Stephens Investment Management Group LLC
    Filed (acceptance time not in the bulk data set), ingested

    • STEPHENS INC /AR/: 8,500 shares
    • Stephens Investment Management Group LLC: 67,911 shares

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

  5. period ended2025-06-30
    13F 8,000 shares
    Change vs previous 13F +8,000 shares

    <0.01% of the 13F portfolio, value $293,520.

    13F-HR 0000757657-25-000019 filed by STEPHENS INC /AR/
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2024-12-31
    13F 0 shares
    Change vs previous 13F -24,178 shares

    13F-HR 0000757657-25-000004 filed by STEPHENS INC /AR/
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  7. period ended2024-09-30
    13F 24,178 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $570,601.

    13F-HR 0001314440-24-000016 filed by STEPHENS INC /AR/
    Filed (acceptance time not in the bulk data set), ingested

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