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Disclosery

BlackRock, Inc.: MGNI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of BlackRock, Inc. on MGNI, newest first. How the timeline and the estimate are built.

BlackRock, Inc. held 12,713,156 MGNI shares at 2026-06-30 per its 13F-HR filed 2026-08-07.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 12,713,156 shares
    Change vs previous 13F +1,055,660 shares

    <0.01% of the 13F portfolio, value $241,295,708.

    13F-HR 0002012383-26-003238 filed by BlackRock, Inc.
    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 11,657,496 shares
    Change vs previous 13F +64,247 shares

    <0.01% of the 13F portfolio, value $138,491,059.

    13F-HR 0002012383-26-001841 filed by BlackRock, Inc.
    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 11,593,249 shares
    Change vs previous 13F +180,094 shares

    <0.01% of the 13F portfolio, value $188,158,440.

    13F-HR 0002012383-26-000920 filed by BlackRock, Inc.
    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 11,413,155 shares
    Change vs previous 13F +715,111 shares

    <0.01% of the 13F portfolio, value $248,578,526.

    13F-HR 0002012383-25-002949 filed by BlackRock, Inc.
    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 10,698,044 shares
    Change vs previous 13F +910,204 shares

    <0.01% of the 13F portfolio, value $258,036,830.

    13F-HR 0001060021-25-000120 filed by BlackRock, Inc.
    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 9,787,840 shares
    Change vs previous 13F -379,403 shares

    <0.01% of the 13F portfolio, value $111,679,260.

    13F-HR 0001576419-25-000869 filed by BlackRock, Inc.
    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 10,167,243 shares
    Change vs previous 13F +319,005 shares

    <0.01% of the 13F portfolio, value $161,862,507.

    13F-HR 0001060021-25-000002 filed by BlackRock, Inc.
    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 9,848,238 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $136,398,099.

    13F-HR 0001426459-24-000006 filed by BlackRock, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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