GROUP ONE TRADING LLC: ACXP position timeline

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

GROUP ONE TRADING LLC held 95 ACXP shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

period ended2026-06-30
13F 95 shares
Change vs previous 13F -150 shares
<0.01% of the 13F portfolio, value $147.
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).
period ended2026-03-31
13F 245 shares
Change vs previous 13F -38 shares
<0.01% of the 13F portfolio, value $909.
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).
period ended2025-12-31
13F 283 shares
Change vs previous 13F -15 shares
<0.01% of the 13F portfolio, value $705.
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).
period ended2025-09-30
13F 298 shares
Change vs previous 13F not available
<0.01% of the 13F portfolio, value $1,278.
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).