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VIKING GLOBAL INVESTORS LP: MAA position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of VIKING GLOBAL INVESTORS LP on MAA, newest first. How the timeline and the estimate are built.

VIKING GLOBAL INVESTORS LP held 5,043,318 MAA shares at 2026-06-30 per its 13F-HR filed 2026-08-14, and reported 5,886,299 shares, 5.07%, in a 13G filed 2026-10-05.

Estimated current stake: 5,886,299 shares, 5.07% of the class

Estimated from 13G of 2026-10-05. As of 2026-09-28, 13G 0000905148-26-004368.

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

The reporting persons may hold separate positions, so the group total can be higher than the largest row.

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

  1. event date2026-09-28
    13G 5,886,299 shares
    Share basis changed not comparable

    5.07% of the class. Different basis (group aggregate from 13G).

    13G 0000905148-26-004368 filed by VIKING GLOBAL INVESTORS LP
    Accepted , ingested

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

    The reporting persons may hold separate positions, so the group total can be higher than the largest row.

  2. period ended2026-06-30
    13F 5,043,318 shares
    Change vs previous 13F +244,914 shares

    2% of the 13F portfolio, value $700,718,603.

    13F-HR 0001103804-26-000006 filed by VIKING GLOBAL INVESTORS 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 4,798,404 shares
    Change vs previous 13F +918,356 shares

    1.64% of the 13F portfolio, value $585,981,096.

    13F-HR 0001103804-26-000004 filed by VIKING GLOBAL INVESTORS 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 3,880,048 shares
    Change vs previous 13F +1,234,966 shares

    1.43% of the 13F portfolio, value $538,977,468.

    13F-HR 0001103804-26-000002 filed by VIKING GLOBAL INVESTORS 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 2,645,082 shares
    Change vs previous 13F +2,645,082 shares

    0.96% of the 13F portfolio, value $369,597,308.

    13F-HR 0001103804-25-000010 filed by VIKING GLOBAL INVESTORS 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 0 shares
    Change vs previous 13F -1,120,651 shares

    13F-HR 0001103804-25-000007 filed by VIKING GLOBAL INVESTORS LP
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  7. period ended2025-03-31
    13F 1,120,651 shares
    Change vs previous 13F not available

    0.6% of the 13F portfolio, value $187,798,695.

    13F-HR 0001103804-25-000004 filed by VIKING GLOBAL INVESTORS LP
    Filed (acceptance time not in the bulk data set), ingested

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