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CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC: AMPX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC on AMPX, newest first. How the timeline and the estimate are built.

CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC held 30,706 AMPX shares at 2026-06-30 per its 13F-HR filed 2026-07-30.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 30,706 shares
    Change vs previous 13F 0 shares

    1.24% of the 13F portfolio, value $425,585.

    13F-HR 0001725547-26-000266 filed by CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC
    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 30,706 shares
    Change vs previous 13F 0 shares

    1.29% of the 13F portfolio, value $517,703.

    13F-HR 0001725547-26-000158 filed by CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC
    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 30,706 shares
    Change vs previous 13F 0 shares

    0.67% of the 13F portfolio, value $242,270.

    13F-HR 0001725547-26-000039 filed by CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC
    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 30,706 shares
    Change vs previous 13F 0 shares

    0.94% of the 13F portfolio, value $323,027.

    13F-HR 0001725547-25-004119 filed by CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC
    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 30,706 shares
    Change vs previous 13F +15,353 shares

    0.39% of the 13F portfolio, value $129,272.

    13F-HR 0001725547-25-003514 filed by CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC
    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 15,353 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $41,146.

    13F-HR 0001725547-25-001442 filed by CORNERSTONE PARTNERS CAPITAL MANAGEMENT, LLC
    Filed (acceptance time not in the bulk data set), ingested

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