GROUP ONE TRADING LLC: UPST position timeline

GROUP ONE TRADING LLC held 26,371 UPST 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 26,371 shares

   Change vs previous 13F +26,371 shares

   0.03% of the 13F portfolio, value $934,325.

   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).

2. period ended2025-12-31

   13F 0 shares

   Change vs previous 13F -43,222 shares

   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).

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

3. period ended2025-09-30

   13F 43,222 shares

   Change vs previous 13F +18,263 shares

   0.07% of the 13F portfolio, value $2,195,678.

   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).

4. period ended2025-06-30

   13F 24,959 shares

   Change vs previous 13F -69,731 shares

   0.05% of the 13F portfolio, value $1,614,348.

   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).

5. period ended2025-03-31

   13F 94,690 shares

   Change vs previous 13F not available

   0.18% of the 13F portfolio, value $4,358,581.

   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).