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Disclosery

Channing Capital Management, LLC: ATMU position timeline

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

Channing Capital Management, LLC held 1,725,956 ATMU shares at 2026-06-30 per its 13F-HR filed 2026-07-29.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 1,725,956 shares
    Change vs previous 13F +340,032 shares

    2.03% of the 13F portfolio, value $88,006,496.

    13F-HR 0001172661-26-002913 filed by Channing Capital Management, LLC
    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 1,385,924 shares
    Change vs previous 13F -242,969 shares

    2.01% of the 13F portfolio, value $78,678,905.

    13F-HR 0001172661-26-001835 filed by Channing Capital Management, LLC
    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 1,628,893 shares
    Change vs previous 13F -86,122 shares

    2.17% of the 13F portfolio, value $84,555,836.

    13F-HR 0001172661-26-000746 filed by Channing Capital Management, LLC
    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 1,715,015 shares
    Change vs previous 13F +1,662,931 shares

    2.04% of the 13F portfolio, value $77,330,026.

    13F-HR 0001172661-25-004659 filed by Channing Capital Management, LLC
    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 52,084 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $1,896,899.

    13F-HR 0001172661-25-003143 filed by Channing Capital Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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