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Disclosery

GROUP ONE TRADING LLC: GLW position timeline

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

GROUP ONE TRADING LLC held 59,465 GLW shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 59,465 shares
    Change vs previous 13F -9,954 shares

    0.44% of the 13F portfolio, value $15,189,145.

    13F-HR 0000932540-26-000011 filed by GROUP ONE TRADING 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 69,419 shares
    Change vs previous 13F +18,722 shares

    0.31% of the 13F portfolio, value $9,438,901.

    13F-HR 0000932540-26-000005 filed by GROUP ONE TRADING LLC
    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 50,697 shares
    Change vs previous 13F not available

    0.13% of the 13F portfolio, value $4,439,029.

    13F-HR 0000932540-26-000002 filed by GROUP ONE TRADING LLC
    Filed (acceptance time not in the bulk data set), ingested

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