Tenneco is primarily an automotive components OEM and after-market ride-control and emissions products manufacturer. The Illinois-headquartered company sells products under its main brand names Clevite Elastomers, Monroe, Walker and XNOx. In 2021, Tenneco generated over 18 billion U.S. dollars in net sales, employing about 71,000 people worldwide. The Clean Air segment was the company's most important segment in terms of profitability in 2021, generating more than 8.1 billion U.S. dollars in revenue in the 2021 fiscal year.
