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SEI INVESTMENTS CO: WLK position timeline

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

SEI INVESTMENTS CO held 10,896 WLK 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 10,896 shares
    Change vs previous 13F -1,873 shares

    <0.01% of the 13F portfolio, value $795,471.

    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 12,769 shares
    Change vs previous 13F -15,673 shares

    <0.01% of the 13F portfolio, value $1,491,674.

    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 28,442 shares
    Change vs previous 13F +13,675 shares

    <0.01% of the 13F portfolio, value $2,103,038.

    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 14,767 shares
    Change vs previous 13F -7,979 shares

    <0.01% of the 13F portfolio, value $1,138,015.

    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 22,746 shares
    Change vs previous 13F +14,055 shares

    <0.01% of the 13F portfolio, value $1,727,203.

    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 8,691 shares
    Change vs previous 13F +864 shares

    <0.01% of the 13F portfolio, value $869,271.

    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 7,827 shares
    Change vs previous 13F +3,851 shares

    <0.01% of the 13F portfolio, value $897,437.

    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 3,976 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $597,236.

    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).