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Polaris Capital Management, LLC: WMB position timeline

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

Polaris Capital Management, LLC held 248,800 WMB shares at 2026-06-30 per its 13F-HR filed 2026-07-27.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 248,800 shares
    Change vs previous 13F -150,100 shares

    1.74% of the 13F portfolio, value $18,495,792.

    13F-HR 0001144969-26-000005 filed by Polaris 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 398,900 shares
    Change vs previous 13F -12,600 shares

    2.38% of the 13F portfolio, value $29,031,942.

    13F-HR 0001144969-26-000004 filed by Polaris 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 411,500 shares
    Change vs previous 13F -68,200 shares

    2.05% of the 13F portfolio, value $24,735,265.

    13F-HR 0001144969-26-000002 filed by Polaris 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 479,700 shares
    Change vs previous 13F -13,500 shares

    2% of the 13F portfolio, value $30,388,995.

    13F-HR 0001144969-25-000010 filed by Polaris 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 493,200 shares
    Change vs previous 13F -37,600 shares

    2.06% of the 13F portfolio, value $30,977,892.

    13F-HR 0001144969-25-000005 filed by Polaris 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 530,800 shares
    Change vs previous 13F -71,100 shares

    1.81% of the 13F portfolio, value $31,720,608.

    13F-HR 0001144969-25-000004 filed by Polaris 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 601,900 shares
    Change vs previous 13F -424,100 shares

    1.57% of the 13F portfolio, value $32,574,828.

    13F-HR 0001144969-25-000001 filed by Polaris Capital 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 1,026,000 shares
    Change vs previous 13F not available

    2.31% of the 13F portfolio, value $46,836,900.

    13F-HR 0001144969-24-000011 filed by Polaris Capital Management, LLC
    Filed (acceptance time not in the bulk data set), ingested

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