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Disclosery

Davidson Kempner Capital Management LP: ATI position timeline

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

Davidson Kempner Capital Management LP held 0 ATI shares at 2025-12-31 per its 13F-HR filed 2026-02-17.

the latest 13F is the newest step

  1. period ended2025-12-31
    13F/A 0 shares
    Change vs previous 13F -530,000 shares

    13F-HR 0001595082-26-000030 filed by Davidson Kempner Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  2. period ended2025-09-30
    13F/A 530,000 shares
    Change vs previous 13F +400,000 shares

    0.6% of the 13F portfolio, value $43,110,200.

    13F-HR 0001595082-25-000098 filed by Davidson Kempner Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-06-30
    13F/A 130,000 shares
    Change vs previous 13F -45,000 shares

    0.17% of the 13F portfolio, value $11,224,200.

    13F-HR 0001595082-25-000062 filed by Davidson Kempner Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-03-31
    13F/A 175,000 shares
    Change vs previous 13F not available

    0.13% of the 13F portfolio, value $9,105,250.

    13F-HR 0001595082-25-000042 filed by Davidson Kempner Capital Management LP
    Filed (acceptance time not in the bulk data set), ingested

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