GROUP ONE TRADING LLC: DFTX position timeline

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

GROUP ONE TRADING LLC held 63,943 DFTX 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 63,943 shares
Change vs previous 13F -23,889 shares
0.09% of the 13F portfolio, value $3,007,879.
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 87,832 shares
Change vs previous 13F not available
0.05% of the 13F portfolio, value $1,660,025.
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).