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PROMETHIUM ADVISORS,LLC: AMSC position timeline

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

PROMETHIUM ADVISORS,LLC held 5,000 AMSC shares at 2026-06-30 per its 13F-HR filed 2026-08-05.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 5,000 shares
    Change vs previous 13F +5,000 shares

    0.1% of the 13F portfolio, value $207,550.

    13F-HR 0002034073-26-000003 filed by PROMETHIUM ADVISORS,LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  2. period ended2025-12-31
    13F 0 shares
    Change vs previous 13F -5,500 shares

    13F-HR 0002034073-26-000001 filed by PROMETHIUM ADVISORS,LLC
    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.

  3. period ended2025-09-30
    13F 5,500 shares
    Change vs previous 13F 0 shares

    0.19% of the 13F portfolio, value $326,645.

    13F-HR 0002034073-25-000004 filed by PROMETHIUM ADVISORS,LLC
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-06-30
    13F 5,500 shares
    Change vs previous 13F not available

    0.12% of the 13F portfolio, value $201,795.

    13F-HR 0001988408-25-000008 filed by PROMETHIUM ADVISORS,LLC
    Filed (acceptance time not in the bulk data set), ingested

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