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Disclosery

Columbia Asset Management: GLW position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Columbia Asset Management on GLW, newest first. How the timeline and the estimate are built.

Columbia Asset Management held 30,362 GLW shares at 2026-06-30 per its 13F-HR filed 2026-07-21.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 30,362 shares
    Change vs previous 13F -294 shares

    1.35% of the 13F portfolio, value $7,755,366.

    13F-HR 0002085853-26-000792 filed by Columbia Asset Management
    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 30,656 shares
    Change vs previous 13F -3,970 shares

    0.79% of the 13F portfolio, value $4,168,296.

    13F-HR 0002085853-26-000430 filed by Columbia Asset Management
    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 34,626 shares
    Change vs previous 13F -2,075 shares

    0.54% of the 13F portfolio, value $3,031,853.

    13F-HR 0002085853-26-000122 filed by Columbia Asset Management
    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 36,701 shares
    Change vs previous 13F -6,830 shares

    0.56% of the 13F portfolio, value $3,010,583.

    13F-HR 0002085853-25-000221 filed by Columbia Asset Management
    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 43,531 shares
    Change vs previous 13F +2,500 shares

    0.45% of the 13F portfolio, value $2,289,295.

    13F-HR 0001667731-25-000872 filed by Columbia Asset Management
    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 41,031 shares
    Change vs previous 13F -7,125 shares

    0.38% of the 13F portfolio, value $1,878,399.

    13F-HR 0001667731-25-000412 filed by Columbia Asset Management
    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 48,156 shares
    Change vs previous 13F +5,401 shares

    0.44% of the 13F portfolio, value $2,288,373.

    13F-HR 0001667731-25-000251 filed by Columbia Asset Management
    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 42,755 shares
    Change vs previous 13F not available

    0.34% of the 13F portfolio, value $1,930,000.

    13F-HR 0001585047-24-000004 filed by Columbia Asset Management
    Filed (acceptance time not in the bulk data set), ingested

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