Starboard Value LP: KMX position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Starboard Value LP on KMX, newest first. How the timeline and the estimate are built.

Starboard Value LP held 3,206,438 KMX 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 3,206,438 shares
Change vs previous 13F -2,994,924 shares
3.75% of the 13F portfolio, value $169,588,506.
13F-HR 0000921895-26-002172 filed by Starboard Value LP
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 6,201,362 shares
Change vs previous 13F not available
5.64% of the 13F portfolio, value $257,852,632.
13F-HR 0000921895-26-001402 filed by Starboard Value LP
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).