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Disclosery

Main Street Research LLC: GLW position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Main Street Research LLC on GLW, newest first. How the timeline and the estimate are built.

Main Street Research LLC held 394,058 GLW shares at 2026-06-30 per its 13F-HR filed 2026-07-29.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 394,058 shares
    Change vs previous 13F +6,340 shares

    4.75% of the 13F portfolio, value $100,654,235.

    13F-HR 0001420506-26-001335 filed by Main Street Research LLC
    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 387,718 shares
    Change vs previous 13F not available

    3.07% of the 13F portfolio, value $52,718,016.

    13F-HR 0001420506-26-000773 filed by Main Street Research LLC
    Filed (acceptance time not in the bulk data set), ingested

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