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Disclosery

Boit C F David: GLW position timeline

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

Boit C F David held 16,900 GLW shares at 2026-06-30 per its 13F-HR filed 2026-07-30.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 16,900 shares
    Change vs previous 13F -100 shares

    1.82% of the 13F portfolio, value $4,316,767.

    13F-HR 0001308331-26-000008 filed by Boit C F David
    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 17,000 shares
    Change vs previous 13F 0 shares

    1.03% of the 13F portfolio, value $2,311,490.

    13F-HR 0001308331-26-000002 filed by Boit C F David
    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 17,000 shares
    Change vs previous 13F 0 shares

    0.63% of the 13F portfolio, value $1,448,910.

    13F-HR 0001308331-26-000001 filed by Boit C F David
    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 17,000 shares
    Change vs previous 13F 0 shares

    0.63% of the 13F portfolio, value $1,394,510.

    13F-HR 0001308331-25-000007 filed by Boit C F David
    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 17,000 shares
    Change vs previous 13F 0 shares

    0.43% of the 13F portfolio, value $894,030.

    13F-HR 0001308331-25-000005 filed by Boit C F David
    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 17,000 shares
    Change vs previous 13F 0 shares

    0.39% of the 13F portfolio, value $778,260.

    13F-HR 0001308331-25-000003 filed by Boit C F David
    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 17,000 shares
    Change vs previous 13F 0 shares

    0.33% of the 13F portfolio, value $807,840.

    13F-HR 0001308331-25-000002 filed by Boit C F David
    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 17,000 shares
    Change vs previous 13F not available

    0.38% of the 13F portfolio, value $763,470.

    13F-HR 0000932974-24-000005 filed by Boit C F David
    Filed (acceptance time not in the bulk data set), ingested

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