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RHUMBLINE ADVISERS: AMPX position timeline

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

RHUMBLINE ADVISERS held 167,963 AMPX shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 167,963 shares
    Change vs previous 13F +35,870 shares

    <0.01% of the 13F portfolio, value $2,327,957.

    13F-HR 0001115418-26-000005 filed by RHUMBLINE ADVISERS
    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 132,093 shares
    Change vs previous 13F +6,939 shares

    <0.01% of the 13F portfolio, value $2,227,081.

    13F-HR 0001115418-26-000003 filed by RHUMBLINE ADVISERS
    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 125,154 shares
    Change vs previous 13F -4,837 shares

    <0.01% of the 13F portfolio, value $987,458.

    13F-HR 0001115418-26-000002 filed by RHUMBLINE ADVISERS
    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 129,991 shares
    Change vs previous 13F +6,731 shares

    <0.01% of the 13F portfolio, value $1,367,497.

    13F-HR 0001115418-25-000021 filed by RHUMBLINE ADVISERS
    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 123,260 shares
    Change vs previous 13F +107,570 shares

    <0.01% of the 13F portfolio, value $518,916.

    13F-HR 0001115418-25-000017 filed by RHUMBLINE ADVISERS
    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/A 15,690 shares
    Change vs previous 13F +5,951 shares

    <0.01% of the 13F portfolio, value $42,043.

    13F-HR/A 0001115418-25-000005 filed by RHUMBLINE ADVISERS
    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/A 9,739 shares
    Change vs previous 13F +3,222 shares

    <0.01% of the 13F portfolio, value $27,266.

    13F-HR/A 0001115418-25-000006 filed by RHUMBLINE ADVISERS
    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 6,517 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $7,229.

    13F-HR 0001115418-24-000011 filed by RHUMBLINE ADVISERS
    Filed (acceptance time not in the bulk data set), ingested

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