Berkshire Hathaway Inc: FWONK position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Berkshire Hathaway Inc on FWONK, newest first. How the timeline and the estimate are built.

Berkshire Hathaway Inc held 0 FWONK shares at 2026-03-31 per its 13F-HR filed 2026-05-15.

the latest 13F is the newest step

period ended2026-03-31
13F 0 shares
Change vs previous 13F -3,018,555 shares
13F-HR 0001193125-26-226661 filed by Berkshire Hathaway Inc
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).
Exited: the 13F for this period no longer lists the position.
period ended2025-12-31
13F 3,018,555 shares
Change vs previous 13F not available
0.11% of the 13F portfolio, value $297,357,853.
13F-HR 0001193125-26-054580 filed by Berkshire Hathaway Inc
Filed 2026-02-17 (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).