A. O. Smith (AOS) Proxy Filing summary

Executive summary

• Supplement updates the 2025 Annual Meeting proxy materials regarding director nominations.

• Adrian I. Peace has withdrawn as a nominee for election as a director; the Board will not replace him.

• Board size will be reduced to nine members effective at the Annual Meeting.

Voting matters and shareholder proposals

• Owners of Common Stock will elect three directors; Class A Common Stock owners will elect six directors.

• Proxy cards remain valid, but votes for Mr. Peace will be disregarded.

• No new proxy card will be issued; instructions for voting or changing votes are provided.

Board of directors and corporate governance

• Adrian I. Peace's withdrawal leads to a reduction in Board size from ten to nine members.

• Remaining nominees for both Common and Class A Common Stock will continue to stand for re-election.