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MILLENNIUM MANAGEMENT LLC: ATAT position timeline

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

MILLENNIUM MANAGEMENT LLC held 1,164,514 ATAT 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 1,164,514 shares
    Change vs previous 13F -222,992 shares

    0.03% of the 13F portfolio, value $37,031,545.

    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 1,387,506 shares
    Change vs previous 13F +917,297 shares

    0.04% of the 13F portfolio, value $51,074,096.

    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 470,209 shares
    Change vs previous 13F -582,183 shares

    0.01% of the 13F portfolio, value $18,526,235.

    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 1,052,392 shares
    Change vs previous 13F +711,660 shares

    0.03% of the 13F portfolio, value $39,559,415.

    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 340,732 shares
    Change vs previous 13F -581,105 shares

    0.01% of the 13F portfolio, value $11,077,197.

    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 921,837 shares
    Change vs previous 13F +38,565 shares

    0.03% of the 13F portfolio, value $26,134,079.

    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 883,272 shares
    Change vs previous 13F +540,491 shares

    0.02% of the 13F portfolio, value $23,751,184.

    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 342,781 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $8,891,739.

    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).