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DIMENSIONAL FUND ADVISORS LP: AMPH position timeline

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

DIMENSIONAL FUND ADVISORS LP held 2,305,107 AMPH 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 2,305,107 shares
    Change vs previous 13F +277,160 shares

    0.01% of the 13F portfolio, value $46,519,189.

    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 2,027,947 shares
    Change vs previous 13F +228,262 shares

    0.01% of the 13F portfolio, value $39,726,234.

    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 1,799,685 shares
    Change vs previous 13F +44,020 shares

    0.01% of the 13F portfolio, value $48,196,126.

    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 1,755,665 shares
    Change vs previous 13F +128,781 shares

    0.01% of the 13F portfolio, value $46,789,114.

    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 1,626,884 shares
    Change vs previous 13F +270,524 shares

    0.01% of the 13F portfolio, value $37,353,797.

    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 1,356,360 shares
    Change vs previous 13F +157,770 shares

    0.01% of the 13F portfolio, value $39,318,734.

    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 1,198,590 shares
    Change vs previous 13F +105,288 shares

    0.01% of the 13F portfolio, value $44,503,008.

    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 1,093,302 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $53,057,036.

    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).