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ROYCE & ASSOCIATES LP: AMSC position timeline

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

ROYCE & ASSOCIATES LP held 555,821 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 555,821 shares
    Change vs previous 13F +13,043 shares

    0.19% of the 13F portfolio, value $23,072,130.

    13F-HR 0000906304-26-000154 filed by ROYCE & ASSOCIATES LP
    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 542,778 shares
    Change vs previous 13F +155,709 shares

    0.18% of the 13F portfolio, value $18,373,035.

    13F-HR 0000906304-26-000094 filed by ROYCE & ASSOCIATES LP
    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 387,069 shares
    Change vs previous 13F +29,489 shares

    0.11% of the 13F portfolio, value $11,139,846.

    13F-HR 0000906304-26-000037 filed by ROYCE & ASSOCIATES LP
    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 357,580 shares
    Change vs previous 13F -454,152 shares

    0.21% of the 13F portfolio, value $21,236,676.

    13F-HR 0000906304-25-000248 filed by ROYCE & ASSOCIATES LP
    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 811,732 shares
    Change vs previous 13F -55,610 shares

    0.31% of the 13F portfolio, value $29,782,447.

    13F-HR 0000906304-25-000173 filed by ROYCE & ASSOCIATES LP
    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 867,342 shares
    Change vs previous 13F +28,410 shares

    0.17% of the 13F portfolio, value $15,733,584.

    13F-HR 0000906304-25-000113 filed by ROYCE & ASSOCIATES LP
    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 838,932 shares
    Change vs previous 13F -116,242 shares

    0.19% of the 13F portfolio, value $20,662,895.

    13F-HR 0000906304-25-000062 filed by ROYCE & ASSOCIATES LP
    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 955,174 shares
    Change vs previous 13F not available

    0.2% of the 13F portfolio, value $22,542,106.

    13F-HR 0000906304-24-000143 filed by ROYCE & ASSOCIATES LP
    Filed (acceptance time not in the bulk data set), ingested

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