The Volvo Group, officially known as AB Volvo, is a Swedish multinational manufacturing corporation headquartered in Gothenburg. Established in 1927, it specializes in heavy-duty trucks, buses, construction equipment, marine, and industrial drive systems, along with financial services. Volvo Trucks, a subsidiary, was the world's second-largest heavy-duty truck manufacturer in 2016. Volvo has been listed on the Stockholm Stock Exchange since 1935 and collaborates with Volvo Cars. The company's history includes the production of its first car, Volvo ÖV 4, in 1927, and strategic shifts in focus from car manufacturing to heavy commercial vehicles in the 1970s.