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Disclosery

Senator Investment Group LP: ATRO position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Senator Investment Group LP on ATRO, newest first. How the timeline and the estimate are built.

Senator Investment Group LP held 6,702 ATRO 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 6,702 shares
    Change vs previous 13F -14,829 shares

    0.02% of the 13F portfolio, value $544,605.

    13F-HR 0001443689-26-000009 filed by Senator Investment Group LP
    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 21,531 shares
    Change vs previous 13F -437,474 shares

    0.07% of the 13F portfolio, value $1,436,764.

    13F-HR 0001443689-26-000006 filed by Senator Investment Group LP
    Filed (acceptance time not in the bulk data set), ingested

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

  3. period ended2025-12-31
    13F 459,005 shares
    Change vs previous 13F -162,689 shares

    1% of the 13F portfolio, value $24,896,431.

    13F-HR 0001443689-26-000003 filed by Senator Investment Group LP
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-09-30
    13F 621,694 shares
    Change vs previous 13F -119,383 shares

    1.05% of the 13F portfolio, value $28,355,463.

    13F-HR 0001443689-25-000020 filed by Senator Investment Group LP
    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 741,077 shares
    Change vs previous 13F +32,194 shares

    0.96% of the 13F portfolio, value $24,811,258.

    13F-HR 0001443689-25-000014 filed by Senator Investment Group LP
    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 708,883 shares
    Change vs previous 13F +50,000 shares

    0.91% of the 13F portfolio, value $17,133,702.

    13F-HR 0001443689-25-000009 filed by Senator Investment Group LP
    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 658,883 shares
    Change vs previous 13F -4,659 shares

    0.31% of the 13F portfolio, value $10,515,773.

    13F-HR 0001443689-25-000003 filed by Senator Investment Group LP
    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 663,542 shares
    Change vs previous 13F not available

    0.61% of the 13F portfolio, value $12,925,798.

    13F-HR 0001443689-24-000016 filed by Senator Investment Group LP
    Filed (acceptance time not in the bulk data set), ingested

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