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MILLENNIUM MANAGEMENT LLC: WLK position timeline

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

MILLENNIUM MANAGEMENT LLC held 366,074 WLK 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 366,074 shares
    Change vs previous 13F +281,077 shares

    0.02% of the 13F portfolio, value $26,723,402.

    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 84,997 shares
    Change vs previous 13F -342,757 shares

    0.01% of the 13F portfolio, value $9,929,350.

    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 427,754 shares
    Change vs previous 13F +321,434 shares

    0.02% of the 13F portfolio, value $31,628,131.

    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 106,320 shares
    Change vs previous 13F -683,526 shares

    0.01% of the 13F portfolio, value $8,193,019.

    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 789,846 shares
    Change vs previous 13F -111,383 shares

    0.05% of the 13F portfolio, value $59,973,007.

    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 901,229 shares
    Change vs previous 13F +708,142 shares

    0.09% of the 13F portfolio, value $90,149,937.

    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 193,087 shares
    Change vs previous 13F +106,329 shares

    0.02% of the 13F portfolio, value $22,137,425.

    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 86,758 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $13,038,860.

    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).