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AMERICAN CAPITAL MANAGEMENT INC: MPWR position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of AMERICAN CAPITAL MANAGEMENT INC on MPWR, newest first. How the timeline and the estimate are built.

AMERICAN CAPITAL MANAGEMENT INC held 5,897 MPWR 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 5,897 shares
    Change vs previous 13F -423 shares

    0.37% of the 13F portfolio, value $8,151,777.

    13F-HR 0001104659-26-097334 filed by AMERICAN CAPITAL MANAGEMENT INC
    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 6,320 shares
    Change vs previous 13F -168 shares

    0.37% of the 13F portfolio, value $6,909,972.

    13F-HR 0001104659-26-062771 filed by AMERICAN CAPITAL MANAGEMENT INC
    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 6,488 shares
    Change vs previous 13F -122 shares

    0.26% of the 13F portfolio, value $5,880,464.

    13F-HR 0001104659-26-016553 filed by AMERICAN CAPITAL MANAGEMENT INC
    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 6,610 shares
    Change vs previous 13F -405 shares

    0.24% of the 13F portfolio, value $6,085,430.

    13F-HR 0001104659-25-112700 filed by AMERICAN CAPITAL MANAGEMENT INC
    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 7,015 shares
    Change vs previous 13F -83 shares

    0.21% of the 13F portfolio, value $5,130,631.

    13F-HR 0001104659-25-078772 filed by AMERICAN CAPITAL MANAGEMENT INC
    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 7,098 shares
    Change vs previous 13F -18 shares

    0.17% of the 13F portfolio, value $4,116,698.

    13F-HR 0001104659-25-049586 filed by AMERICAN CAPITAL MANAGEMENT INC
    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 7,116 shares
    Change vs previous 13F -25 shares

    0.16% of the 13F portfolio, value $4,210,537.

    13F-HR 0001104659-25-011376 filed by AMERICAN CAPITAL MANAGEMENT INC
    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 7,141 shares
    Change vs previous 13F not available

    0.22% of the 13F portfolio, value $6,601,854.

    13F-HR 0001104659-24-119240 filed by AMERICAN CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

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