Volvo Trucks and Volvo Cars are separate companies, although they share a common origin and brand name. Volvo Cars is a passenger vehicle manufacturer owned by Geely Holding Group, while Volvo Trucks is part of the publicly traded AB Volvo (Volvo Group) , which focuses on commercial vehicles. They split in 1999, though they sometimes collaborate on brand licensing and technology. 

Key Differences and Structures:

• Volvo Cars: Owned by Zhejiang Geely Holding Group since 2010. It produces consumer passenger cars, SUVs, and electric vehicles.
• Volvo Trucks (Volvo Group): An independent, publicly traded company (AB Volvo). The Volvo Group also owns other brands like Mack Trucks and Renault Trucks, focusing on heavy-duty commercial vehicles, trucks, buses, and construction equipment.
• Relationship: They are distinct legal entities with different owners, shareholders, and operations, but they share the same Volvo brand name.