Skip to content
Disclosery

SEI INVESTMENTS CO: AMSC position timeline

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

SEI INVESTMENTS CO held 85,215 AMSC 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 85,215 shares
    Change vs previous 13F -139,221 shares

    <0.01% of the 13F portfolio, value $3,537,223.

    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 224,436 shares
    Change vs previous 13F +145,626 shares

    0.01% of the 13F portfolio, value $7,597,027.

    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 78,810 shares
    Change vs previous 13F +12,612 shares

    <0.01% of the 13F portfolio, value $2,268,271.

    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 66,198 shares
    Change vs previous 13F +24,125 shares

    <0.01% of the 13F portfolio, value $3,931,679.

    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 42,073 shares
    Change vs previous 13F +12,217 shares

    <0.01% of the 13F portfolio, value $1,543,652.

    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 29,856 shares
    Change vs previous 13F -22,250 shares

    <0.01% of the 13F portfolio, value $541,975.

    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 52,106 shares
    Change vs previous 13F -10,891 shares

    <0.01% of the 13F portfolio, value $1,283,500.

    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 62,997 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $1,486,969.

    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).