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SEI INVESTMENTS CO: MKSI position timeline

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

SEI INVESTMENTS CO held 53,018 MKSI 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 53,018 shares
    Change vs previous 13F -48,196 shares

    0.02% of the 13F portfolio, value $23,581,860.

    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 101,214 shares
    Change vs previous 13F -24,844 shares

    0.02% of the 13F portfolio, value $23,260,628.

    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 126,058 shares
    Change vs previous 13F +13,888 shares

    0.02% of the 13F portfolio, value $20,144,655.

    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 112,170 shares
    Change vs previous 13F +2,820 shares

    0.01% of the 13F portfolio, value $13,883,561.

    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 109,350 shares
    Change vs previous 13F -35,753 shares

    0.01% of the 13F portfolio, value $10,865,518.

    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 145,103 shares
    Change vs previous 13F -5,922 shares

    0.01% of the 13F portfolio, value $11,629,499.

    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 151,025 shares
    Change vs previous 13F +36,721 shares

    0.02% of the 13F portfolio, value $15,765,652.

    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 114,304 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $12,425,881.

    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).