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Disclosery

GROUP ONE TRADING LLC: RILY position timeline

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

GROUP ONE TRADING LLC held 194,692 RILY 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 194,692 shares
    Change vs previous 13F +62,535 shares

    0.05% of the 13F portfolio, value $1,565,324.

    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 132,157 shares
    Change vs previous 13F -58,142 shares

    0.03% of the 13F portfolio, value $967,389.

    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 190,299 shares
    Change vs previous 13F +171,458 shares

    0.03% of the 13F portfolio, value $888,696.

    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 18,841 shares
    Change vs previous 13F -477,317 shares

    <0.01% of the 13F portfolio, value $112,575.

    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 496,158 shares
    Change vs previous 13F +56,463 shares

    0.05% of the 13F portfolio, value $1,473,589.

    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 439,695 shares
    Change vs previous 13F -203,500 shares

    0.07% of the 13F portfolio, value $1,701,620.

    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 643,195 shares
    Change vs previous 13F not available

    0.1% of the 13F portfolio, value $2,952,265.

    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).