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Disclosery

SEI INVESTMENTS CO: AMG position timeline

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

SEI INVESTMENTS CO held 117,142 AMG 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 117,142 shares
    Change vs previous 13F +9,488 shares

    0.03% of the 13F portfolio, value $39,644,274.

    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 107,654 shares
    Change vs previous 13F +5,357 shares

    0.03% of the 13F portfolio, value $29,786,546.

    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 102,297 shares
    Change vs previous 13F +4,423 shares

    0.03% of the 13F portfolio, value $29,488,960.

    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 97,874 shares
    Change vs previous 13F +37,202 shares

    0.03% of the 13F portfolio, value $23,337,043.

    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 60,672 shares
    Change vs previous 13F +12,006 shares

    0.01% of the 13F portfolio, value $11,938,045.

    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 48,666 shares
    Change vs previous 13F +1,147 shares

    0.01% of the 13F portfolio, value $8,177,228.

    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 47,519 shares
    Change vs previous 13F -18,070 shares

    0.01% of the 13F portfolio, value $8,786,561.

    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 65,589 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $11,661,727.

    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).