Tenneco Inc. (ticker: 0RT7.L) designs, manufactures and markets clean air, powertrain, ride performance systems and aftermarket products for light vehicles, commercial trucks, off-highway and other applications worldwide; core offerings include emissions control systems such as catalytic converters, diesel oxidation catalysts, particulate filters and complete exhaust systems; powertrain components encompassing pistons, rings, bearings, valve train parts and sealing solutions; ride control products like shock absorbers, struts and suspension systems; and aftermarket replacement parts under brands including Monroe, Walker, Rancho and FP Diesel. The company, founded in 1930 and headquartered in Northville Charter Township, Michigan, operates through segments covering original equipment manufacturers and aftermarket customers across North America, Europe, Asia Pacific and other regions, with subsidiaries including DRiV for aftermarket brands. Apollo Global Management took Tenneco private in November 2022; in February 2025, the company announced a strategic investment from Apollo Fund X into its Clean Air and Powertrain divisions, with American Industrial Partners participating to fuel organic growth and acquisitions, completing the transaction in April 2025; Tenneco advanced its strategy further in November 2025 by listing Tenneco India on the stock exchange, reinforcing its expansion in India's manufacturing and mobility markets.