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DIMENSIONAL FUND ADVISORS LP: MDU position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of DIMENSIONAL FUND ADVISORS LP on MDU, newest first. How the timeline and the estimate are built.

DIMENSIONAL FUND ADVISORS LP held 10,435,060 MDU shares at 2026-06-30 per its 13F-HR filed 2026-08-11, and reported 10,679,046 shares, 5.1%, in a 13G filed 2026-10-08.

Estimated current stake: 10,679,046 shares, 5.1% of the class

Estimated from 13G of 2026-10-08. As of 2026-09-30, 13G 0000354204-26-001079.

Shares are the reporting group's aggregate and may include entities that do not file a 13F.

Percent of portfolio stays on the 13F for 2026-06-30.

  1. event date2026-09-30
    13G 10,679,046 shares
    Share basis changed not comparable

    5.1% of the class. Different basis (group aggregate from 13G).

    13G 0000354204-26-001079 filed by DIMENSIONAL FUND ADVISORS LP
    Accepted , ingested

    A 13D/G states the aggregate of its reporting persons, which may include entities that do not file a 13F.

  2. period ended2026-06-30
    13F 10,435,060 shares
    Change vs previous 13F +149,313 shares

    0.04% of the 13F portfolio, value $221,332,320.

    13F-HR 0000354204-26-000866 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2026-03-31
    13F 10,285,747 shares
    Change vs previous 13F +253,950 shares

    0.04% of the 13F portfolio, value $213,119,983.

    13F-HR 0000354204-26-000581 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-12-31
    13F 10,031,797 shares
    Change vs previous 13F +267,700 shares

    0.04% of the 13F portfolio, value $195,823,975.

    13F-HR 0000354204-26-000347 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-09-30
    13F 9,764,097 shares
    Change vs previous 13F +339,573 shares

    0.04% of the 13F portfolio, value $173,897,555.

    13F-HR 0000354204-25-001337 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-06-30
    13F 9,424,524 shares
    Change vs previous 13F +973,958 shares

    0.04% of the 13F portfolio, value $157,105,870.

    13F-HR 0000354204-25-001097 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2025-03-31
    13F 8,450,566 shares
    Change vs previous 13F +263,572 shares

    0.04% of the 13F portfolio, value $142,893,899.

    13F-HR 0000354204-25-000866 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-12-31
    13F 8,186,994 shares
    Change vs previous 13F +467,355 shares

    0.04% of the 13F portfolio, value $147,530,190.

    13F-HR 0000354204-25-000528 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  9. period ended2024-09-30
    13F 7,719,639 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $211,594,820.

    13F-HR 0000354204-24-004773 filed by DIMENSIONAL FUND ADVISORS LP
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).