Skip to content
Disclosery

Yorktown Management & Research Co Inc: AMPH position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Yorktown Management & Research Co Inc on AMPH, newest first. How the timeline and the estimate are built.

Yorktown Management & Research Co Inc held 0 AMPH shares at 2025-03-31 per its 13F-HR filed 2025-04-23.

the latest 13F is the newest step

  1. period ended2025-03-31
    13F 0 shares
    Change vs previous 13F -6,600 shares

    13F-HR 0000950123-25-003639 filed by Yorktown Management & Research Co Inc
    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.

  2. period ended2024-12-31
    13F 6,600 shares
    Change vs previous 13F not available

    0.24% of the 13F portfolio, value $245,058.

    13F-HR 0000950123-25-000592 filed by Yorktown Management & Research Co Inc
    Filed (acceptance time not in the bulk data set), ingested

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