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AMERICAN CENTURY COMPANIES INC: SIGA position timeline

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

AMERICAN CENTURY COMPANIES INC held 1,506,065 SIGA 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 1,506,065 shares
    Change vs previous 13F +188,281 shares

    <0.01% of the 13F portfolio, value $5,482,077.

    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 1,317,784 shares
    Change vs previous 13F +152,295 shares

    <0.01% of the 13F portfolio, value $7,050,144.

    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 1,165,489 shares
    Change vs previous 13F -67,243 shares

    <0.01% of the 13F portfolio, value $7,121,141.

    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 1,232,732 shares
    Change vs previous 13F -172,442 shares

    0.01% of the 13F portfolio, value $11,279,503.

    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 1,405,174 shares
    Change vs previous 13F +34,514 shares

    <0.01% of the 13F portfolio, value $9,161,737.

    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 1,370,660 shares
    Change vs previous 13F +98,688 shares

    <0.01% of the 13F portfolio, value $7,511,217.

    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 1,271,972 shares
    Change vs previous 13F +114,270 shares

    <0.01% of the 13F portfolio, value $7,644,552.

    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 1,157,702 shares
    Change vs previous 13F not available

    <0.01% of the 13F portfolio, value $7,814,489.

    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).