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ADVISORY RESEARCH INC: AMPH position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ADVISORY RESEARCH INC on AMPH, newest first. How the timeline and the estimate are built.

ADVISORY RESEARCH INC held 25,337 AMPH shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 25,337 shares
    Change vs previous 13F +2 shares

    0.05% of the 13F portfolio, value $511,301.

    13F-HR 0000902584-26-000007 filed by ADVISORY RESEARCH INC
    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 25,335 shares
    Change vs previous 13F +10,174 shares

    0.06% of the 13F portfolio, value $496,313.

    13F-HR 0000902584-26-000003 filed by ADVISORY RESEARCH INC
    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 15,161 shares
    Change vs previous 13F -307 shares

    0.05% of the 13F portfolio, value $406,012.

    13F-HR 0000902584-26-000002 filed by ADVISORY RESEARCH INC
    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 15,468 shares
    Change vs previous 13F +570 shares

    0.05% of the 13F portfolio, value $412,222.

    13F-HR 0000902584-25-000004 filed by ADVISORY RESEARCH INC
    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 14,898 shares
    Change vs previous 13F +1,009 shares

    0.05% of the 13F portfolio, value $342,058.

    13F-HR 0001085146-25-005021 filed by ADVISORY RESEARCH INC
    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 13,889 shares
    Change vs previous 13F +36 shares

    0.07% of the 13F portfolio, value $402,642.

    13F-HR 0001085146-25-003120 filed by ADVISORY RESEARCH INC
    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 13,853 shares
    Change vs previous 13F +43 shares

    0.09% of the 13F portfolio, value $514,362.

    13F-HR 0001085146-25-001329 filed by ADVISORY RESEARCH INC
    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 13,810 shares
    Change vs previous 13F not available

    0.12% of the 13F portfolio, value $670,199.

    13F-HR 0001085146-24-005704 filed by ADVISORY RESEARCH INC
    Filed (acceptance time not in the bulk data set), ingested

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