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Disclosery

GROUP ONE TRADING LLC: CMCSA position timeline

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

GROUP ONE TRADING LLC held 238,795 CMCSA 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 238,795 shares
    Change vs previous 13F -49,504 shares

    0.17% of the 13F portfolio, value $5,862,417.

    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 288,299 shares
    Change vs previous 13F -134,133 shares

    0.27% of the 13F portfolio, value $8,277,064.

    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 422,432 shares
    Change vs previous 13F +291,124 shares

    0.37% of the 13F portfolio, value $12,626,492.

    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).

  4. period ended2025-09-30
    13F 131,308 shares
    Change vs previous 13F +79,803 shares

    0.12% of the 13F portfolio, value $4,125,697.

    13F-HR 0000932540-25-000040 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).

  5. period ended2025-06-30
    13F 51,505 shares
    Change vs previous 13F -16,908 shares

    0.06% of the 13F portfolio, value $1,838,213.

    13F-HR 0000932540-25-000034 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).

  6. period ended2025-03-31
    13F 68,413 shares
    Change vs previous 13F +36,620 shares

    0.11% of the 13F portfolio, value $2,524,440.

    13F-HR 0000932540-25-000027 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).

  7. period ended2024-12-31
    13F/A 31,793 shares
    Change vs previous 13F -25,482 shares

    0.04% of the 13F portfolio, value $1,193,191.

    13F-HR/A 0000932540-25-000028 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).

  8. period ended2024-09-30
    13F 57,275 shares
    Change vs previous 13F not available

    0.09% of the 13F portfolio, value $2,392,377.

    13F-HR 0000932540-24-000015 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).