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Calamos Advisors LLC: AMPX position timeline

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

Calamos Advisors LLC held 94,158 AMPX shares at 2026-06-30 per its 13F-HR filed 2026-07-31.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 94,158 shares
    Change vs previous 13F -270,348 shares

    <0.01% of the 13F portfolio, value $1,305,030.

    13F-HR 0001316507-26-000003 filed by Calamos 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 364,506 shares
    Change vs previous 13F +245,473 shares

    0.02% of the 13F portfolio, value $6,145,572.

    13F-HR 0001316507-26-000002 filed by Calamos 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 119,033 shares
    Change vs previous 13F -52,019 shares

    <0.01% of the 13F portfolio, value $939,170.

    13F-HR 0001316507-26-000001 filed by Calamos 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 ended2025-09-30
    13F 171,052 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $1,799,467.

    13F-HR 0001316507-25-000003 filed by Calamos Advisors LLC
    Filed (acceptance time not in the bulk data set), ingested

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