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Disclosery

Corundum Group, Inc.: AMGN position timeline

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

Corundum Group, Inc. held 3,678 AMGN 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 3,678 shares
    Change vs previous 13F +41 shares

    0.4% of the 13F portfolio, value $1,331,877.

    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 3,637 shares
    Change vs previous 13F +358 shares

    0.43% of the 13F portfolio, value $1,279,678.

    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 3,279 shares
    Change vs previous 13F -247 shares

    0.36% of the 13F portfolio, value $1,073,249.

    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 3,526 shares
    Change vs previous 13F +8 shares

    0.41% of the 13F portfolio, value $995,037.

    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 3,518 shares
    Change vs previous 13F +1,570 shares

    0.43% of the 13F portfolio, value $982,261.

    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 1,948 shares
    Change vs previous 13F -2,048 shares

    0.29% of the 13F portfolio, value $606,899.

    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 3,996 shares
    Change vs previous 13F +2,030 shares

    0.39% of the 13F portfolio, value $1,041,517.

    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 1,966 shares
    Change vs previous 13F not available

    0.29% of the 13F portfolio, value $633,465.

    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).