Milwaukee, Wisconsin-based A. O. Smith Corporation (AOS) manufactures and markets residential and commercial gas and electric water heaters, boilers, heat pumps, tanks, and water treatment products in North America and internationally. Valued at a market capitalization of $7.9 billion, the company offers water heaters, boilers, water treatment products comprising point-of-entry water softeners, well water solutions, and whole-home water filtration products, and others.
AOS shares have underperformed the broader market over the past year and have also lagged behind in 2026. AOS stock has declined 15% over the past 52 weeks and 14.4% on a YTD basis. In comparison, the S&P 500 Index ($SPX) has returned 27.9% over the past year and risen 9.2% in 2026.