CSS LLC/IL: MAT position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of CSS LLC/IL on MAT, newest first. How the timeline and the estimate are built.

CSS LLC/IL held 63,342 MAT 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 63,342 shares
Change vs previous 13F +5,170 shares
0.04% of the 13F portfolio, value $879,187.
13F-HR 0001103646-26-000012 filed by CSS LLC/IL
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 58,172 shares
Change vs previous 13F not available
0.05% of the 13F portfolio, value $845,239.
13F-HR 0001103646-26-000009 filed by CSS LLC/IL
Filed 2026-05-15 (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).