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Disclosery

BlackRock, Inc.: WLK position timeline

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

BlackRock, Inc. held 3,294,162 WLK shares at 2026-06-30 per its 13F-HR filed 2026-08-07.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 3,294,162 shares
    Change vs previous 13F +215,075 shares

    <0.01% of the 13F portfolio, value $240,473,839.

    13F-HR 0002012383-26-003238 filed by BlackRock, Inc.
    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 3,079,087 shares
    Change vs previous 13F -182,346 shares

    0.01% of the 13F portfolio, value $359,698,953.

    13F-HR 0002012383-26-001841 filed by BlackRock, Inc.
    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 3,261,433 shares
    Change vs previous 13F +75,697 shares

    <0.01% of the 13F portfolio, value $241,150,363.

    13F-HR 0002012383-26-000920 filed by BlackRock, Inc.
    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 3,185,736 shares
    Change vs previous 13F -142,960 shares

    <0.01% of the 13F portfolio, value $245,492,785.

    13F-HR 0002012383-25-002949 filed by BlackRock, Inc.
    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 3,328,696 shares
    Change vs previous 13F -331,710 shares

    <0.01% of the 13F portfolio, value $252,747,861.

    13F-HR 0001060021-25-000120 filed by BlackRock, Inc.
    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 3,660,406 shares
    Change vs previous 13F +2,511 shares

    0.01% of the 13F portfolio, value $366,150,394.

    13F-HR 0001576419-25-000869 filed by BlackRock, Inc.
    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 3,657,895 shares
    Change vs previous 13F +160,039 shares

    0.01% of the 13F portfolio, value $419,377,612.

    13F-HR 0001060021-25-000002 filed by BlackRock, Inc.
    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 3,497,856 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $525,692,821.

    13F-HR 0001426459-24-000006 filed by BlackRock, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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