secwatch / observer
BRK-B BERKSHIRE HATHAWAY INC
CIK 0001067983 also searchable as BRK-A, BRK.A, BRK.B 42 ready 8-Ks latest May 7, 2026, 7:59 PM ET RSS · JSON
Activity: QUIET 0 filings / 30d vs 1 baseline Risk accumulating: repeated leadership change (2)
Ready 8-Ks 42
Latest filing May 7, 2026, 7:59 PM ET
Top materiality 0.85
Event mix earnings ×18 · debt ×11 · leadership ×7
Sentiment 10 pos · 5 neg · 27 neu
Executive change recent →

Recent 8-K filings for BRK-B

Executive changes

Appointed

Charles C. Chang

Chief Financial Officer
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2026-06-01
Filed
May 7, 2026, 7:59 PM ET
As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.
Departed

Marc D. Hamburg

Chief Financial Officer
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2026-06-01
Successor
Charles C. Chang
Filed
May 7, 2026, 7:59 PM ET
In connection with Mr. Hamburg’s retirement as Berkshire’s Chief Financial Officer
Role change

Warren Buffett

Chief Executive Officer
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2026-01-01
Successor
Greg Abel
Filed
May 8, 2025, 7:59 PM ET
On May 3, 2025, Mr. Warren Buffett, Berkshire’s Chairman and CEO, announced that he was going to recommend to Berkshire’s Board of Directors at its meeting to be held on May 4, 2025 that Mr. Greg Abel, Berkshire’s Vice Chairman – Non-Insurance Operations, be appointed Berkshire’s Chief Executive Officer to become effective on January 1, 2026.
Appointed

Greg Abel

President and CEO
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2026-01-01
Filed
May 8, 2025, 7:59 PM ET
On May 4, 2025, Berkshire’s Board of Directors voted unanimously to appoint Mr. Abel to become Berkshire’s President and CEO effective on January 1, 2026.
Appointed

Thomas S. Murphy, Jr.

Director
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2022-12-19
Filed
December 19, 2022, 6:59 PM ET
On December 19, 2022, Thomas S. Murphy, Jr. was elected to Berkshire’s Board of Directors to fill the vacant Board of Directors position
Departed

Thomas S. Murphy

Director
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2022-02-14
Filed
February 18, 2022, 6:59 PM ET
On February 14, 2022, Thomas S. Murphy resigned from Berkshire Hathaway’s Board of Directors.
Appointed

Susan A. Buffett

Director
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2021-10-20
Filed
October 20, 2021, 7:59 PM ET
On October 20, 2021, Susan A. Buffett and Christopher C. Davis were each elected to Berkshire’s Board of Directors following the Board of Directors unanimous approval of a resolution to increase the number of members of the Board of Directors to fifteen.
Appointed

Christopher C. Davis

Director
BRK-B · BERKSHIRE HATHAWAY INC
Effective
2021-10-20
Filed
October 20, 2021, 7:59 PM ET
On October 20, 2021, Susan A. Buffett and Christopher C. Davis were each elected to Berkshire’s Board of Directors following the Board of Directors unanimous approval of a resolution to increase the number of members of the Board of Directors to fifteen.

Materiality & sentiment trend

Max materiality 0.85 · Median 0.62 · Most common event earnings

10 positive 5 negative 27 neutral

source · BRK-B on sec.gov