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Disclosery

Corundum Group, Inc.: SPY position timeline

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

Corundum Group, Inc. held 12,537 SPY 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 12,537 shares
    Change vs previous 13F +150 shares

    2.78% of the 13F portfolio, value $9,362,255.

    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 12,387 shares
    Change vs previous 13F +110 shares

    2.69% of the 13F portfolio, value $8,055,762.

    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 12,277 shares
    Change vs previous 13F +357 shares

    2.81% of the 13F portfolio, value $8,371,932.

    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 11,920 shares
    Change vs previous 13F -748 shares

    3.26% of the 13F portfolio, value $7,940,866.

    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 12,668 shares
    Change vs previous 13F +95 shares

    3.46% of the 13F portfolio, value $7,826,924.

    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 12,573 shares
    Change vs previous 13F -11,338 shares

    3.37% of the 13F portfolio, value $7,033,210.

    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 23,911 shares
    Change vs previous 13F +10,580 shares

    5.23% of the 13F portfolio, value $14,013,759.

    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 13,331 shares
    Change vs previous 13F not available

    3.49% of the 13F portfolio, value $7,648,795.

    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).