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Disclosery

Round Rock Advisors LLC: AMSC position timeline

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

Round Rock Advisors LLC held 26,431 AMSC shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 26,431 shares
    Change vs previous 13F +6,091 shares

    0.14% of the 13F portfolio, value $1,097,151.

    13F-HR 0001951757-26-001257 filed by Round Rock 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 ended2026-03-31
    13F 20,340 shares
    Change vs previous 13F +9,631 shares

    0.11% of the 13F portfolio, value $688,509.

    13F-HR 0001951757-26-000878 filed by Round Rock Advisors 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/A 10,709 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $308,205.

    13F-HR/A 0001951757-26-000520 filed by Round Rock Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

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