Warren Buffett stepped down as Berkshire Hathaway chairman on Sept. 18, 2026, and his son Howard Buffett became chairman. [S1][S2]
Verification result: verified, because four independent reporting families directly support the central leadership change and none of the material claims is contradicted in the supplied record. [S1][S2][S3][S4]
The strongest consistent detail is that Buffett became chairman emeritus effective immediately while remaining a Berkshire director. [S1][S2]
The chair transition was described as long planned and followed Greg Abel's earlier assumption of the chief executive role. [S1][S2]
No material inconsistency appears among the supplied accounts about the chair transition or Buffett's continuing board role. [S1][S2][S3][S4][S5]
Because the supplied sources are news reports attributing the news to Berkshire and Buffett's letter rather than standalone primary documents, this review is limited to secondary-source corroboration. [S1][S2]
