American Axle & Manufacturing (AAM), founded in Detroit in 1994, designs, engineers, and manufactures driveline and metal-forming technologies for electric, hybrid, and internal-combustion vehicles. The company describes a global operation with nearly 75 facilities in 15 countries and produces automotive systems and components such as axles and electric-drive units. On February 3, 2026, its parent company Dauch Corporation completed the acquisition of Dowlais Group and its GKN Automotive and GKN Powder Metallurgy businesses.
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GKN AutomotiveGKN Automotive makes driveline and drive-system technologies for vehicles and describes itself as a global automotive technology partner. It says it has engineered for more than 265 years and operates 47 manufacturing sites and five technology centres, with headquarters in the UK. Its portfolio supports vehicle architectures including electric, hybrid and internal-combustion vehicles.BOWLING GREEN, OH
Dana IncorporatedFounded in 1904 around Clarence Spicer’s encased universal joint, Dana Incorporated designs and manufactures drivetrain and electrified propulsion systems for light and commercial vehicles. From early experiments with electric drivelines to today’s fully integrated e-powertrain systems, the company has carried its power-conveyance expertise through more than 120 years of vehicle evolution. Dana now employs 28,000 people across 24 countries and operates 66 major manufacturing facilities.MAUMEE, OH
Piston AutomotiveFounded in Detroit in 1996 by former Detroit Piston Vinnie Johnson, Piston Automotive grew from a corrugated-pallet maker into a value-added automotive assembly supplier. The company engineers and builds vehicle systems for major manufacturers, with particular experience in complex electric and hybrid battery systems, while supporting programs from prototype development through production and supply-chain management. Headquartered in Southfield, Michigan, Piston Automotive operates manufacturing facilities across the Midwest and Ontario and is recognized as a leading minority-owned business.MARION, OH
Advanced Metals Machining, LLCAdvanced Metals Machining, LLC manufactures and processes close-tolerance metal components and assemblies, with a facility equipped for multi-axis milling and turning. The company reports more than 20 years of work on complex components, and says its staff monitors projects from prototype through production and assembly. Acquired in 2023 by Crescent Aerospace Technology, AMM serves aerospace and satellite suppliers in North America.OLYPHANT, PA