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Disclosery

Corundum Group, Inc.: AMZN position timeline

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

Corundum Group, Inc. held 8,601 AMZN 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 8,601 shares
    Change vs previous 13F +151 shares

    0.61% of the 13F portfolio, value $2,049,962.

    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 8,450 shares
    Change vs previous 13F -630 shares

    0.59% of the 13F portfolio, value $1,759,881.

    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 9,080 shares
    Change vs previous 13F +120 shares

    0.7% of the 13F portfolio, value $2,095,846.

    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 8,960 shares
    Change vs previous 13F -38 shares

    0.81% of the 13F portfolio, value $1,967,347.

    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 8,998 shares
    Change vs previous 13F -255 shares

    0.87% of the 13F portfolio, value $1,974,071.

    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 9,253 shares
    Change vs previous 13F -3,141 shares

    0.84% of the 13F portfolio, value $1,760,476.

    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 12,394 shares
    Change vs previous 13F +2,230 shares

    1.02% of the 13F portfolio, value $2,719,120.

    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 10,164 shares
    Change vs previous 13F not available

    0.86% of the 13F portfolio, value $1,893,858.

    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).