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SEI INVESTMENTS CO: MGY position timeline

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

SEI INVESTMENTS CO held 273,602 MGY 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 273,602 shares
    Change vs previous 13F -181,750 shares

    0.01% of the 13F portfolio, value $6,999,241.

    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 455,352 shares
    Change vs previous 13F +219,603 shares

    0.01% of the 13F portfolio, value $14,375,299.

    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 235,749 shares
    Change vs previous 13F +44,999 shares

    0.01% of the 13F portfolio, value $5,160,425.

    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 190,750 shares
    Change vs previous 13F +11,838 shares

    <0.01% of the 13F portfolio, value $4,552,914.

    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 178,912 shares
    Change vs previous 13F -616,561 shares

    <0.01% of the 13F portfolio, value $4,021,823.

    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 795,473 shares
    Change vs previous 13F -5,033 shares

    0.03% of the 13F portfolio, value $20,093,625.

    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 800,506 shares
    Change vs previous 13F -56,654 shares

    0.02% of the 13F portfolio, value $18,715,845.

    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 857,160 shares
    Change vs previous 13F not available

    0.03% of the 13F portfolio, value $20,931,851.

    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).