secwatch / observer
8-K filed May 7, 2026, 7:59 PM ET ticker BRK-B CIK 0001067983
leadership confidence high sentiment neutral materiality 0.35

Berkshire Hathaway discloses CFO succession, annual meeting results

BERKSHIRE HATHAWAY INC

item 2.02item 5.02item 5.03item 5.07item 9.01

Machine-readable event card

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0001067983
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BERKSHIRE HATHAWAY INC
filed_at
2026-05-07T23:59:59+00:00
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JSON Markdown Plain text

Executive movements

Machine-extracted from this filing. Every card cites the SEC source. See all recent executive movements.

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

Source-grounded claims

daf6c4ef1f382c09ef9c7b6d68b8a634e3b9fdea

BERKSHIRE HATHAWAY INC reported financial results for first quarter ended March 31, 2026.

On May 2, 2026, Berkshire Hathaway Inc. (“Berkshire” or “Company”) issued a press release announcing the Company’s earnings for the first quarter ended March 31, 2026.

SEC 8-K Item 2.02 confidence 0.9 SEC evidence

0961f6a068

Charles C. Chang was appointed as Chief Financial Officer at BERKSHIRE HATHAWAY INC.

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

SEC 8-K Item 5.02 confidence 0.95 SEC evidence

905224db90

Marc D. Hamburg retired as Chief Financial Officer at BERKSHIRE HATHAWAY INC.

In connection with Mr. Hamburg’s retirement as Berkshire’s Chief Financial Officer

SEC 8-K Item 5.02 confidence 0.95 SEC evidence

7a34739e1d1b31a3134bf8b0a48cc3c55079d36d

BERKSHIRE HATHAWAY INC: Amended and restated By-Laws to update officer roles and responsibilities, changes to Sections 4, 6, and 10 (effective 2026-05-03).

On May 3, 2026, the Board of Directors of Berkshire (the “Board”) voted to amend and restate Berkshire’s By-Laws effective immediately.

SEC 8-K Item 5.03/5.05/5.06 confidence 0.9 SEC evidence

Comparable filings

FIBK

First Interstate BancSystem: three directors retire per age policy; charter amended to plurality voting

FIRST INTERSTATE BANCSYSTEM INC May 29, 2026, 4:26 PM ET leadership Items 5.02, 5.03, 5.07, 9.01

same fact type: executive_change same SEC item: 5.02, 5.03, 5.07, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

on May 27, 2026, each of Ms. Patricia L. Moss and Messrs. David L. Jahnke and Stephen M. Lacy, each having reached the retirement age of 72, was deemed to have retired and resigned automatically from the Company’s Board of Directors

Filing page SEC filing

TKNO

Alpha Teknova director Irene Davis to retire; board reduced from 8 to 7; shareholder votes approved nominees and auditor

Alpha Teknova, Inc. June 1, 2026, 5:22 PM ET leadership Items 5.02, 5.07, 9.01

same fact type: executive_change same SEC item: 5.02, 5.07, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

On May 27, 2026, Irene Davis, a member of the Board of Directors (the “Board”) of Alpha Teknova, Inc. (the “Company”) and a member of the Nominating and Corporate Governance Committee, notified the Company of her intention not to stand for re-election to the Board at the Company’s 2026 Annual Meeting of Stockholders (the “Meeting”) and to retire from the Board and all committees thereof, effective upon the date of the Meeting.

Filing page SEC filing

FRST

Primis Financial elects two new board members; Clagett and Kabbash depart

Primis Financial Corp. May 27, 2026, 5:19 PM ET leadership Items 5.02, 5.07, 9.01

same fact type: executive_change same SEC item: 5.02, 5.07, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

directors Robert Y. Clagett and Charles A. Kabbash did not stand for re-election at the annual meeting of stockholders held on May 21, 2026

Filing page SEC filing

JOB

Darla Moore resigns from GEE Group board effective June 1, 2026, due to other commitments

GEE Group Inc. June 1, 2026, 4:47 PM ET leadership Items 5.02, 9.01

same fact type: executive_change same SEC item: 5.02, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

On June 1, 2026, GEE Group Inc. (the “Company”) (NYSE American: JOB) issued a press release announcing that Ms. Darla Moore, has resigned as a member of the Board of Directors (the “Board”) and from all committees of the Company’s Board effective June 1, 2026, due to the time requirements necessary for her existing and new business commitments.

Filing page SEC filing

SERA

Sera Prognostics director Jeff Elliott resigns ahead of annual meeting

SERA PROGNOSTICS, INC. June 1, 2026, 4:44 PM ET leadership Items 5.02, 9.01

same fact type: executive_change same SEC item: 5.02, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

Jeffrey T. Elliott, a member of the Board of Directors (the “Board”) of Sera Prognostics, Inc. (the “Company”), notified the Company of his decision to resign from the Board effective as of June 4, 2026

Filing page SEC filing

FTI

TechnipFMC appoints Eric D. Mullins to Board of Directors effective June 1, 2026

TechnipFMC plc June 1, 2026, 4:38 PM ET leadership Items 5.02, 7.01, 9.01

same fact type: executive_change same SEC item: 5.02, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

the Board elected Eric Mullins to the Board and appointed Mr. Mullins to the Audit Committee of the Board, effective June 1, 2026.

Filing page SEC filing

VMI

Former CFO Thomas Liguori enters separation agreement; $4.9M retirement benefits

VALMONT INDUSTRIES INC June 1, 2026, 4:15 PM ET leadership Items 5.02, 9.01

same fact type: executive_change same SEC item: 5.02, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

Valmont Industries Inc. previously reported the appointment of John Schwietz as Valmont’s Executive Vice President and Chief Financial Officer and Corporate Secretary, effective April 8, 2026, to succeed Thomas Liguori.

Filing page SEC filing

MED

Medifast Chief Legal Officer resigns; receives one-month severance of $35,648

MEDIFAST INC June 1, 2026, 8:59 AM ET leadership Items 5.02, 9.01

same fact type: executive_change same SEC item: 5.02, 9.01 same event type: leadership similar materiality

This filing

As previously announced, Charles C. Chang will succeed Marc D. Hamburg as Berkshire’s Chief Financial Officer on June 1, 2026.

Comparable filing

Effective as of May 29, 2026, Jason L. Groves, Esq., the Chief Legal Officer & Corporate Secretary of Medifast, Inc. (the “Company”), tendered his resignation from the Company.

Filing page SEC filing

Source: SEC EDGAR
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