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DIMENSIONAL FUND ADVISORS LP: AMPY position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of DIMENSIONAL FUND ADVISORS LP on AMPY, newest first. How the timeline and the estimate are built.

DIMENSIONAL FUND ADVISORS LP held 1,594,952 AMPY shares at 2026-06-30 per its 13F-HR filed 2026-08-11.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,594,952 shares
    Change vs previous 13F -37,811 shares

    <0.01% of the 13F portfolio, value $6,348,057.

    13F-HR 0000354204-26-000866 filed by DIMENSIONAL FUND ADVISORS LP
    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 1,632,763 shares
    Change vs previous 13F -447,505 shares

    <0.01% of the 13F portfolio, value $10,188,781.

    13F-HR 0000354204-26-000581 filed by DIMENSIONAL FUND ADVISORS LP
    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 2,080,268 shares
    Change vs previous 13F +8,154 shares

    <0.01% of the 13F portfolio, value $9,507,002.

    13F-HR 0000354204-26-000347 filed by DIMENSIONAL FUND ADVISORS LP
    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 2,072,114 shares
    Change vs previous 13F -156,251 shares

    <0.01% of the 13F portfolio, value $10,879,619.

    13F-HR 0000354204-25-001337 filed by DIMENSIONAL FUND ADVISORS LP
    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 2,228,365 shares
    Change vs previous 13F -183,803 shares

    <0.01% of the 13F portfolio, value $7,131,263.

    13F-HR 0000354204-25-001097 filed by DIMENSIONAL FUND ADVISORS LP
    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 2,412,168 shares
    Change vs previous 13F -51,020 shares

    <0.01% of the 13F portfolio, value $9,021,951.

    13F-HR 0000354204-25-000866 filed by DIMENSIONAL FUND ADVISORS LP
    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 2,463,188 shares
    Change vs previous 13F +88,707 shares

    <0.01% of the 13F portfolio, value $14,778,869.

    13F-HR 0000354204-25-000528 filed by DIMENSIONAL FUND ADVISORS LP
    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 2,374,481 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $15,504,923.

    13F-HR 0000354204-24-004773 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

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