GROUP ONE TRADING LLC: RBRK position timeline

GROUP ONE TRADING LLC held 0 RBRK 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 0 shares

   Change vs previous 13F -18,131 shares

   13F-HR 0000932540-26-000011 filed by GROUP ONE TRADING LLC
   Filed 2026-08-14 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC

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

   Exited: the 13F for this period no longer lists the position.

2. period ended2026-03-31

   13F 18,131 shares

   Change vs previous 13F -13,980 shares

   0.03% of the 13F portfolio, value $887,875.

   13F-HR 0000932540-26-000005 filed by GROUP ONE TRADING LLC
   Filed 2026-05-13 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC

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

3. period ended2025-12-31

   13F 32,111 shares

   Change vs previous 13F -38,627 shares

   0.07% of the 13F portfolio, value $2,455,849.

   13F-HR 0000932540-26-000002 filed by GROUP ONE TRADING LLC
   Filed 2026-02-12 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC

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

4. period ended2025-09-30

   13F 70,738 shares

   Change vs previous 13F +70,738 shares

   0.17% of the 13F portfolio, value $5,818,200.

   13F-HR 0000932540-25-000040 filed by GROUP ONE TRADING LLC
   Filed 2025-11-12 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC

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

5. period ended2025-06-30

   13F 0 shares

   Change vs previous 13F -3,034 shares

   13F-HR 0000932540-25-000034 filed by GROUP ONE TRADING LLC
   Filed 2025-08-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC

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

   Exited: the 13F for this period no longer lists the position.

6. period ended2025-03-31

   13F 3,034 shares

   Change vs previous 13F +3,034 shares

   0.01% of the 13F portfolio, value $185,013.

   13F-HR 0000932540-25-000027 filed by GROUP ONE TRADING LLC
   Filed 2025-05-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC

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

7. period ended2024-09-30

   13F 0 shares

   Change vs previous 13F not available

   13F-HR 0000932540-24-000015 filed by GROUP ONE TRADING LLC
   Filed 2024-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC

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

   Exited: the 13F for this period no longer lists the position.