SMITH A O CORP (AOS) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-04-13 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: SMITH A O CORP (AOS) CIK: 0000091142 --- Reporting Owner --- Name: SMITH MARK D CIK: 0001236626 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-04-13 | Code: A (Grant or award) Shares: +2,262 | Price: $66.32 Total Value: $150,015.84 Shares Owned After: 118,504 | Ownership: D (Direct) Footnotes: [F1] Payment of retainer in stock under the A. O. Smith Corporation directors' compensation program based on the average of the high and low price of Common Stock on April 13, 2026. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) [Holding #2] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] The reporting person beneficially owns the shares as settlor of a revocable family trust. [Holding #3] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F3] Convertible at any time to Common Stock. [F4] None. [Holding #4] Security: Class A Common Stock Ownership: I (Indirect) Footnotes: [F3] Convertible at any time to Common Stock. [F4] None. [F2] The reporting person beneficially owns the shares as settlor of a revocable family trust. --- Footnotes (Complete Index) --- F1: Payment of retainer in stock under the A. O. Smith Corporation directors' compensation program based on the average of the high and low price of Common Stock on April 13, 2026. F2: The reporting person beneficially owns the shares as settlor of a revocable family trust. F3: Convertible at any time to Common Stock. F4: None. --- Signature --- /s/ James F. Stern, Attorney-in-Fact for Mark D. Smith (2026-04-15)