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Disclosery

Summa Corp.: AMD position timeline

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

Summa Corp. held 115,529 AMD shares at 2026-06-30 per its 13F-HR filed 2026-08-06.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 115,529 shares
    Change vs previous 13F -6,945 shares

    21.06% of the 13F portfolio, value $67,111,951.

    13F-HR 0001214659-26-009701 filed by Summa Corp.
    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 122,474 shares
    Change vs previous 13F +704 shares

    10.3% of the 13F portfolio, value $24,914,886.

    13F-HR 0001214659-26-005326 filed by Summa Corp.
    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 121,770 shares
    Change vs previous 13F -7,900 shares

    11.18% of the 13F portfolio, value $26,078,263.

    13F-HR 0001214659-26-000679 filed by Summa Corp.
    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 129,670 shares
    Change vs previous 13F +21,970 shares

    9.23% of the 13F portfolio, value $20,979,309.

    13F-HR 0001214659-25-015365 filed by Summa Corp.
    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 107,700 shares
    Change vs previous 13F -12,500 shares

    7.94% of the 13F portfolio, value $15,282,630.

    13F-HR 0001214659-25-010906 filed by Summa Corp.
    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 120,200 shares
    Change vs previous 13F -7,000 shares

    7.14% of the 13F portfolio, value $12,349,349.

    13F-HR 0001214659-25-006133 filed by Summa Corp.
    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 127,200 shares
    Change vs previous 13F +3,900 shares

    7.53% of the 13F portfolio, value $15,364,558.

    13F-HR 0001214659-25-001191 filed by Summa Corp.
    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 123,300 shares
    Change vs previous 13F not available

    9.7% of the 13F portfolio, value $20,231,064.

    13F-HR 0001214659-24-017623 filed by Summa Corp.
    Filed (acceptance time not in the bulk data set), ingested

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