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683 Capital Management, LLC: AMTM position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of 683 Capital Management, LLC on AMTM, newest first. How the timeline and the estimate are built.

683 Capital Management, LLC held 1,100,000 AMTM 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 1,100,000 shares
    Change vs previous 13F +325,000 shares

    2.09% of the 13F portfolio, value $22,737,000.

    13F-HR 0001404574-26-000023 filed by 683 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 775,000 shares
    Change vs previous 13F -60,000 shares

    1.87% of the 13F portfolio, value $20,212,000.

    13F-HR 0001404574-26-000018 filed by 683 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 835,000 shares
    Change vs previous 13F -440,000 shares

    2.01% of the 13F portfolio, value $24,215,000.

    13F-HR 0001404574-26-000003 filed by 683 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 1,275,000 shares
    Change vs previous 13F -355,000 shares

    2.77% of the 13F portfolio, value $30,536,250.

    13F-HR 0001404574-25-000002 filed by 683 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 1,630,000 shares
    Change vs previous 13F +617,000 shares

    3.9% of the 13F portfolio, value $38,484,300.

    13F-HR 0001085146-25-005065 filed by 683 Capital Management, LLC
    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 1,013,000 shares
    Change vs previous 13F +588,000 shares

    1.87% of the 13F portfolio, value $18,436,600.

    13F-HR 0001085146-25-003184 filed by 683 Capital Management, LLC
    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 425,000 shares
    Change vs previous 13F not available

    0.88% of the 13F portfolio, value $8,937,750.

    13F-HR 0001085146-25-001511 filed by 683 Capital Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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