The Williams Companies (WMB) Proxy filing summary

Executive summary

• Supplement updates the 2026 Annual Meeting proxy materials due to a change in director nominees.

• Alan S. Armstrong has resigned from the Board effective March 23, 2026, following his appointment as a U.S. Senator.

• Stephen W. Bergstrom was elected Nonexecutive Board Chair after Armstrong's departure.

Voting matters and shareholder proposals

• Proposal 1 to elect 11 directors is amended to remove Armstrong; votes for him will not be counted.

• Proxy cards and voting instructions remain valid; no new cards will be issued.

• No other agenda items are affected by this supplement.

• Shareholders do not need to take action unless they wish to change their vote.

Board of directors and corporate governance

• Board size will decrease from 11 to 10 directors if all other nominees are elected.

• Armstrong was Executive Board Chair and served on the Environmental, Health and Safety Committee.

• Bergstrom, previously Independent Lead Director and former Chairman, is now Nonexecutive Board Chair.