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LOOMIS SAYLES & CO L P: ATI position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of LOOMIS SAYLES & CO L P on ATI, newest first. How the timeline and the estimate are built.

LOOMIS SAYLES & CO L P held 581,326 ATI shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 581,326 shares
    Change vs previous 13F -72,090 shares

    0.14% of the 13F portfolio, value $114,579,355.

    13F-HR 0000312348-26-000034 filed by LOOMIS SAYLES & CO L P
    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 653,416 shares
    Change vs previous 13F -282,257 shares

    0.13% of the 13F portfolio, value $95,045,892.

    13F-HR 0000312348-26-000026 filed by LOOMIS SAYLES & CO L P
    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 935,673 shares
    Change vs previous 13F -73,776 shares

    0.13% of the 13F portfolio, value $107,377,834.

    13F-HR 0000312348-26-000014 filed by LOOMIS SAYLES & CO L P
    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 1,009,449 shares
    Change vs previous 13F -30,164 shares

    0.1% of the 13F portfolio, value $82,108,581.

    13F-HR 0000312348-25-000035 filed by LOOMIS SAYLES & CO L P
    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 1,039,613 shares
    Change vs previous 13F -192,684 shares

    0.11% of the 13F portfolio, value $89,760,186.

    13F-HR 0000312348-25-000028 filed by LOOMIS SAYLES & CO L P
    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 1,232,297 shares
    Change vs previous 13F -26,930 shares

    0.09% of the 13F portfolio, value $64,117,000.

    13F-HR 0000312348-25-000021 filed by LOOMIS SAYLES & CO L P
    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 1,259,227 shares
    Change vs previous 13F -37,928 shares

    0.09% of the 13F portfolio, value $69,308,000.

    13F-HR 0000312348-25-000014 filed by LOOMIS SAYLES & CO L P
    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 1,297,155 shares
    Change vs previous 13F not available

    0.11% of the 13F portfolio, value $86,793,000.

    13F-HR 0000312348-24-000037 filed by LOOMIS SAYLES & CO L P
    Filed (acceptance time not in the bulk data set), ingested

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