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SEI INVESTMENTS CO: MTSI position timeline

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

SEI INVESTMENTS CO held 165,735 MTSI 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 165,735 shares
    Change vs previous 13F -53,628 shares

    0.06% of the 13F portfolio, value $63,040,041.

    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 219,363 shares
    Change vs previous 13F +2,395 shares

    0.04% of the 13F portfolio, value $48,713,689.

    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 216,968 shares
    Change vs previous 13F -38,999 shares

    0.04% of the 13F portfolio, value $37,162,581.

    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 255,967 shares
    Change vs previous 13F -17,379 shares

    0.03% of the 13F portfolio, value $31,865,299.

    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 273,346 shares
    Change vs previous 13F -9,128 shares

    0.05% of the 13F portfolio, value $39,168,127.

    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 282,474 shares
    Change vs previous 13F +8,189 shares

    0.04% of the 13F portfolio, value $28,354,536.

    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 274,285 shares
    Change vs previous 13F -37,602 shares

    0.05% of the 13F portfolio, value $35,632,602.

    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 311,887 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $34,700,663.

    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).