Skip to content
Disclosery

MILLENNIUM MANAGEMENT LLC: ATEC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of MILLENNIUM MANAGEMENT LLC on ATEC, newest first. How the timeline and the estimate are built.

MILLENNIUM MANAGEMENT LLC held 1,145,837 ATEC 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 1,145,837 shares
    Change vs previous 13F -1,663,708 shares

    0.01% of the 13F portfolio, value $9,911,490.

    13F-HR 0001273087-26-000007 filed by MILLENNIUM 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 2,809,545 shares
    Change vs previous 13F +583,618 shares

    0.02% of the 13F portfolio, value $30,567,850.

    13F-HR 0001273087-26-000004 filed by MILLENNIUM 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 2,225,927 shares
    Change vs previous 13F +1,658,349 shares

    0.03% of the 13F portfolio, value $46,833,504.

    13F-HR 0001273087-26-000002 filed by MILLENNIUM 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 567,578 shares
    Change vs previous 13F +82,622 shares

    0.01% of the 13F portfolio, value $8,252,584.

    13F-HR 0001273087-25-000034 filed by MILLENNIUM 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 484,956 shares
    Change vs previous 13F +149,917 shares

    <0.01% of the 13F portfolio, value $5,383,012.

    13F-HR 0001273087-25-000028 filed by MILLENNIUM 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 335,039 shares
    Change vs previous 13F -728,884 shares

    <0.01% of the 13F portfolio, value $3,397,295.

    13F-HR 0001273087-25-000019 filed by MILLENNIUM 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 1,063,923 shares
    Change vs previous 13F -3,368,560 shares

    0.01% of the 13F portfolio, value $9,766,813.

    13F-HR 0001273087-25-000015 filed by MILLENNIUM MANAGEMENT LLC
    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 4,432,483 shares
    Change vs previous 13F not available

    0.02% of the 13F portfolio, value $24,644,605.

    13F-HR 0001273087-24-000118 filed by MILLENNIUM MANAGEMENT LLC
    Filed (acceptance time not in the bulk data set), ingested

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