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AI brief of an SEC Form 8-K · Berkshire Hathaway (BRK-B)

Berkshire Hathaway CFO Marc Hamburg to retire; Charles Chang named successor June 1, 2026

Neutral Impact 4 of 5 leadership Written later

Berkshire Hathaway said CFO Marc Hamburg will resign as Chief Financial Officer on June 1, 2026 and retire on June 1, 2027, and that Charles C. Chang, currently CFO of Berkshire Hathaway Energy, will succeed him on June 1, 2026. The December 8, 2025 press release also named new leaders at GEICO, the consumer products and retailing businesses and general counsel, and said Gregory E. Abel will become President and CEO of Berkshire on January 1, 2026, which changes top leadership across several units.

Key points

  • Marc D. Hamburg resigns as CFO June 1, 2026 and retires June 1, 2027, after 40 years of service.
  • Charles C. Chang, 57, succeeds Hamburg as SVP and CFO on June 1, 2026; he has been BHE's CFO since October 1, 2024.
  • Chang's compensation arrangements have not been finalized and will be disclosed in an amended 8-K.
  • Gregory E. Abel becomes President and CEO on January 1, 2026; Nancy L. Pierce named GEICO CEO effective immediately after Todd A. Combs resigned to join JPMorgan Chase.

The filing

CompanyBerkshire Hathaway (BRK-B)
Form8-K, current report
Filed with the SECDec 11, 2025, 6:02 AM ET
Accession number0001193125-25-314935

Items reported: 5.02 Director / Officer Change

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 2:07 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on December 11, 2025.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.