Mark D. Smith - 13 Apr 2026 Form 4 Insider Report for SMITH A O CORP (AOS)

Reporting relationship: Director
Issuer ticker: AOS
Reported as of: 13 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 15 Apr 2026, 15:06:53 UTC
Prior SEC filing: 29 Jul 2025
Source filing: View source filing
Reporting owner signature: James F. Stern, Attorney-in-Fact for Mark D. Smith

Key filing fact

Mark D. Smith filed Form 4 for SMITH A O CORP (AOS) on 15 Apr 2026.

Key facts

This page summarizes Mark D. Smith's Form 4 filing for SMITH A O CORP (AOS).
1 reported transaction and 2 derivative rows are listed below.
Accepted by SEC: 15 Apr 2026, 15:06.

Change

Previous filing in this sequence was filed on 29 Jul 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001236626 Primary reporting owner

SMITH MARK D

Relationship: Director
Address: A. O. SMITH CORPORATION, 11270 WEST PARK PLACE, MILWAUKEE
Signature: James F. Stern, Attorney-in-Fact for Mark D. Smith
Signature date: 15 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AOS transaction

Common Stock

Award

Transaction value
Shares: +2,262
Change %: +1.9%
Price: $66.32^*
Shares after: 118,504
Date: 13 Apr 2026
Ownership: Direct
Footnotes: F1

AOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 8,956
Date: 13 Apr 2026
Ownership: Held by spouse

AOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 6,773
Date: 13 Apr 2026
Ownership: In trust
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AOS holding Derivative

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,676
Date: 13 Apr 2026
Ownership: Held by spouse
Underlying class: Common Stock
Underlying amount: 3,676
Exercise price: $0.000000
Footnotes: F3, F4

AOS holding Derivative

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 270,776
Date: 13 Apr 2026
Ownership: In trust
Underlying class: Common Stock
Underlying amount: 270,776
Exercise price: $0.000000
Footnotes: F2, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote 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.

Footnote F2

The reporting person beneficially owns the shares as settlor of a revocable family trust.

Footnote F3

Convertible at any time to Common Stock.

Footnote F4

None.