A. O. Smith Corporation
Doing business as A O Smith CORP
At a glance
Employees500+
In business sinceNot reported
HeadquartersMilwaukee, WI
US patents377
SAM.gov UEIS4HBBQ7GTAW5
CAGE code33409
Incorporated inDE
LEI549300XG4US7UJNECY36
Brands
Bahrain
BrazilThis company sells these brands.
- water heating
- water treatment
- international markets
- sustainability reports
- ESG scorecard
Named on the company’s own website, read JUL 29, 2026
CareersCareers page — seen SEP 8, 2026
Supplier designations
For Profit OrganizationManufacturer of Goods
Self-certified by the company in its SAM.gov registration
Patents
377 US patents granted 1976–2025, 46 of them in the five years to SEP 2025, including 11 design patents.
Thermal processes and apparatus 131Electrical machinery, apparatus, energy 112Mechanical elements 24Surface technology, coating 21Chemical engineering 12
- Set of water line connections for a water heaterUS D1093558 · granted SEP 16, 2025
- Water heater with reserve capacity, and method of operating the sameUS 12,313,299 · granted MAY 27, 2025
- UV LED sterilizing tankUS 12,202,745 · granted JAN 21, 2025
- Media tankUS 12,179,166 · granted DEC 31, 2024
- Water heating system and method of operating the sameUS 12,098,867 · granted SEP 24, 2024
Newest 5 shown · Granted to A. O. Smith Corporation · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| A. O. Smith Corporation | Milwaukee | WI | 500+ | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.