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AMERICAN CENTURY COMPANIES INC: MGNI position timeline

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

AMERICAN CENTURY COMPANIES INC held 4,622,736 MGNI shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 4,622,736 shares
    Change vs previous 13F -4,080 shares

    0.04% of the 13F portfolio, value $87,739,553.

    13F-HR 0000748054-26-000005 filed by AMERICAN CENTURY COMPANIES 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 4,626,816 shares
    Change vs previous 13F -660,112 shares

    0.03% of the 13F portfolio, value $54,966,590.

    13F-HR 0000748054-26-000002 filed by AMERICAN CENTURY COMPANIES 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 5,286,928 shares
    Change vs previous 13F +692,858 shares

    0.04% of the 13F portfolio, value $85,806,867.

    13F-HR 0000748054-26-000001 filed by AMERICAN CENTURY COMPANIES 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 4,594,070 shares
    Change vs previous 13F -235,127 shares

    0.05% of the 13F portfolio, value $100,058,887.

    13F-HR 0000748054-25-000009 filed by AMERICAN CENTURY COMPANIES 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 4,829,197 shares
    Change vs previous 13F +1,868,188 shares

    0.06% of the 13F portfolio, value $116,480,255.

    13F-HR 0001085146-25-004910 filed by AMERICAN CENTURY COMPANIES 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 2,961,009 shares
    Change vs previous 13F +2,651,033 shares

    0.02% of the 13F portfolio, value $33,785,117.

    13F-HR 0001085146-25-003039 filed by AMERICAN CENTURY COMPANIES 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 309,976 shares
    Change vs previous 13F +17,545 shares

    <0.01% of the 13F portfolio, value $4,934,818.

    13F-HR 0001085146-25-000985 filed by AMERICAN CENTURY COMPANIES 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 292,431 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $4,050,169.

    13F-HR 0001085146-24-005525 filed by AMERICAN CENTURY COMPANIES INC
    Filed (acceptance time not in the bulk data set), ingested

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