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ALLIANCEBERNSTEIN L.P.: MPWR position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ALLIANCEBERNSTEIN L.P. on MPWR, newest first. How the timeline and the estimate are built.

ALLIANCEBERNSTEIN L.P. held 177,107 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 177,107 shares
    Change vs previous 13F +52,460 shares

    0.06% of the 13F portfolio, value $193,639,938.

    13F-HR 0001109448-26-000261 filed by ALLIANCEBERNSTEIN L.P.
    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 124,647 shares
    Change vs previous 13F -9,984 shares

    0.04% of the 13F portfolio, value $112,975,055.

    13F-HR 0001109448-26-000101 filed by ALLIANCEBERNSTEIN L.P.
    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 134,631 shares
    Change vs previous 13F -146,072 shares

    0.04% of the 13F portfolio, value $122,024,153.

    13F-HR 0001109448-26-000021 filed by ALLIANCEBERNSTEIN L.P.
    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 280,703 shares
    Change vs previous 13F -33,433 shares

    0.08% of the 13F portfolio, value $258,426,410.

    13F-HR 0001109448-25-000079 filed by ALLIANCEBERNSTEIN L.P.
    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 314,136 shares
    Change vs previous 13F -13,282 shares

    0.07% of the 13F portfolio, value $229,752,788.

    13F-HR 0001532155-25-000161 filed by ALLIANCEBERNSTEIN L.P.
    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 327,418 shares
    Change vs previous 13F -15,784 shares

    0.07% of the 13F portfolio, value $189,895,892.

    13F-HR 0001532155-25-000116 filed by ALLIANCEBERNSTEIN L.P.
    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 343,202 shares
    Change vs previous 13F -101,763 shares

    0.07% of the 13F portfolio, value $203,072,623.

    13F-HR 0001532155-25-000050 filed by ALLIANCEBERNSTEIN L.P.
    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 444,965 shares
    Change vs previous 13F not available

    0.14% of the 13F portfolio, value $411,370,143.

    13F-HR 0001532155-24-000162 filed by ALLIANCEBERNSTEIN L.P.
    Filed (acceptance time not in the bulk data set), ingested

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