Skip to content
Disclosery

Tufton Capital Management: GLW position timeline

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

Tufton Capital Management held 143,707 GLW shares at 2026-06-30 per its 13F-HR filed 2026-07-27.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 143,707 shares
    Change vs previous 13F -18,088 shares

    6.16% of the 13F portfolio, value $36,707,000.

    13F-HR 0001055963-26-000003 filed by Tufton Capital 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 161,795 shares
    Change vs previous 13F -22,024 shares

    4% of the 13F portfolio, value $21,999,000.

    13F-HR 0001055963-26-000002 filed by Tufton Capital 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 183,819 shares
    Change vs previous 13F -4,224 shares

    2.81% of the 13F portfolio, value $16,095,000.

    13F-HR 0001055963-26-000001 filed by Tufton Capital 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 188,043 shares
    Change vs previous 13F -21,512 shares

    2.75% of the 13F portfolio, value $15,425,000.

    13F-HR 0001055963-25-000005 filed by Tufton Capital 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 209,555 shares
    Change vs previous 13F -8,353 shares

    2.1% of the 13F portfolio, value $11,020,000.

    13F-HR 0001055963-25-000003 filed by Tufton Capital 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 217,908 shares
    Change vs previous 13F -2,402 shares

    1.92% of the 13F portfolio, value $9,975,866.

    13F-HR 0001055963-25-000002 filed by Tufton Capital 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 220,310 shares
    Change vs previous 13F -2,624 shares

    1.98% of the 13F portfolio, value $10,469,154.

    13F-HR 0001055963-25-000001 filed by Tufton Capital 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 222,934 shares
    Change vs previous 13F not available

    1.89% of the 13F portfolio, value $10,065,492.

    13F-HR 0001055963-24-000004 filed by Tufton Capital Management
    Filed (acceptance time not in the bulk data set), ingested

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