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SEI INVESTMENTS CO: AMKR position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of SEI INVESTMENTS CO on AMKR, newest first. How the timeline and the estimate are built.

SEI INVESTMENTS CO held 341,099 AMKR shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 341,099 shares
    Change vs previous 13F -60,716 shares

    0.03% of the 13F portfolio, value $29,412,975.

    13F-HR 0002048251-26-006553 filed by SEI INVESTMENTS CO
    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 401,815 shares
    Change vs previous 13F +101,523 shares

    0.02% of the 13F portfolio, value $18,095,462.

    13F-HR 0002048251-26-003739 filed by SEI INVESTMENTS CO
    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 300,292 shares
    Change vs previous 13F +58,009 shares

    0.01% of the 13F portfolio, value $11,855,092.

    13F-HR 0000350894-26-000005 filed by SEI INVESTMENTS CO
    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 242,283 shares
    Change vs previous 13F +46,612 shares

    0.01% of the 13F portfolio, value $6,880,885.

    13F-HR 0002048251-25-002343 filed by SEI INVESTMENTS CO
    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 195,671 shares
    Change vs previous 13F -232,585 shares

    <0.01% of the 13F portfolio, value $4,106,994.

    13F-HR 0001041062-25-000162 filed by SEI INVESTMENTS CO
    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/A 428,256 shares
    Change vs previous 13F -147,593 shares

    0.01% of the 13F portfolio, value $7,734,340.

    13F-HR/A 0001041062-25-000106 filed by SEI INVESTMENTS CO
    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 575,849 shares
    Change vs previous 13F +59,822 shares

    0.02% of the 13F portfolio, value $14,793,557.

    13F-HR 0001041062-25-000019 filed by SEI INVESTMENTS CO
    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 516,027 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $15,790,515.

    13F-HR 0001041062-24-000165 filed by SEI INVESTMENTS CO
    Filed (acceptance time not in the bulk data set), ingested

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