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Disclosery

Corundum Group, Inc.: WM position timeline

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

Corundum Group, Inc. held 6,016 WM 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 6,016 shares
    Change vs previous 13F +66 shares

    0.4% of the 13F portfolio, value $1,340,846.

    13F-HR 0001486083-26-000003 filed by Corundum Group, 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 5,950 shares
    Change vs previous 13F +605 shares

    0.46% of the 13F portfolio, value $1,367,250.

    13F-HR 0001486083-26-000002 filed by Corundum Group, 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 5,345 shares
    Change vs previous 13F -391 shares

    0.39% of the 13F portfolio, value $1,174,350.

    13F-HR 0001486083-26-000001 filed by Corundum Group, 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 5,736 shares
    Change vs previous 13F -16 shares

    0.52% of the 13F portfolio, value $1,266,681.

    13F-HR 0001486083-25-000006 filed by Corundum Group, 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 5,752 shares
    Change vs previous 13F +35 shares

    0.58% of the 13F portfolio, value $1,316,173.

    13F-HR 0001486083-25-000005 filed by Corundum Group, 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 5,717 shares
    Change vs previous 13F -3,231 shares

    0.63% of the 13F portfolio, value $1,323,543.

    13F-HR 0001486083-25-000004 filed by Corundum Group, 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 8,948 shares
    Change vs previous 13F +3,297 shares

    0.67% of the 13F portfolio, value $1,805,617.

    13F-HR 0001486083-25-000001 filed by Corundum Group, 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 5,651 shares
    Change vs previous 13F not available

    0.54% of the 13F portfolio, value $1,173,148.

    13F-HR 0001486083-24-000004 filed by Corundum Group, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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