SIMPLEX TRADING, LLC: AMPL position timeline

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

SIMPLEX TRADING, LLC held 10,862 AMPL shares at 2026-06-30 per its 13F-HR filed 2026-08-12.

the latest 13F is the newest step

period ended2026-06-30
13F 10,862 shares
Change vs previous 13F +4,357 shares
<0.01% of the 13F portfolio, value $83,094.
13F-HR 0001488542-26-000011 filed by SIMPLEX TRADING, LLC
Filed 2026-08-12 (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 6,505 shares
Change vs previous 13F +6,505 shares
<0.01% of the 13F portfolio, value $44,364.
13F-HR 0001488542-26-000009 filed by SIMPLEX TRADING, LLC
Filed 2026-05-14 (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 ended2024-09-30
13F 0 shares
Change vs previous 13F not available
13F-HR 0001488542-24-000015 filed by SIMPLEX TRADING, LLC
Filed 2024-11-08 (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.