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Disclosery

ALLIANCEBERNSTEIN L.P.: AMBQ position timeline

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

ALLIANCEBERNSTEIN L.P. held 609,607 AMBQ 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 609,607 shares
    Change vs previous 13F -76,491 shares

    0.01% of the 13F portfolio, value $15,490,114.

    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 686,098 shares
    Change vs previous 13F +290,727 shares

    0.01% of the 13F portfolio, value $19,553,793.

    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 395,371 shares
    Change vs previous 13F -40,783 shares

    <0.01% of the 13F portfolio, value $11,268,074.

    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 436,154 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $13,049,728.

    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).