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Disclosery

Capital World Investors: ATI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Capital World Investors on ATI, newest first. How the timeline and the estimate are built.

Capital World Investors held 5,249,249 ATI 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 5,249,249 shares
    Change vs previous 13F -463,680 shares

    0.12% of the 13F portfolio, value $1,034,626,978.

    13F-HR 0001422849-26-000113 filed by Capital World Investors
    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 5,712,929 shares
    Change vs previous 13F -1,642,864 shares

    0.11% of the 13F portfolio, value $831,002,652.

    13F-HR 0001422849-26-000046 filed by Capital World Investors
    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 7,355,793 shares
    Change vs previous 13F -544,779 shares

    0.11% of the 13F portfolio, value $844,150,805.

    13F-HR 0001422849-26-000010 filed by Capital World Investors
    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 7,900,572 shares
    Change vs previous 13F +1,080,201 shares

    0.09% of the 13F portfolio, value $642,632,526.

    13F-HR 0001422849-25-000069 filed by Capital World Investors
    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 6,820,371 shares
    Change vs previous 13F -161,803 shares

    0.09% of the 13F portfolio, value $588,870,832.

    13F-HR 0001422848-25-000151 filed by Capital World Investors
    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 6,982,174 shares
    Change vs previous 13F +106,598 shares

    0.06% of the 13F portfolio, value $363,282,513.

    13F-HR 0000732812-25-000016 filed by Capital World Investors
    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 6,875,576 shares
    Change vs previous 13F +3,446,919 shares

    0.06% of the 13F portfolio, value $378,431,703.

    13F-HR 0001422848-25-000012 filed by Capital World Investors
    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 3,428,657 shares
    Change vs previous 13F not available

    0.04% of the 13F portfolio, value $229,411,440.

    13F-HR 0000017283-24-000032 filed by Capital World Investors
    Filed (acceptance time not in the bulk data set), ingested

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