PHOENIX — The W.W. Williams Co. has completed the acquisition of Auto Safety House (ASH), the Thomas Built Buses dealer for Arizona.

Along with selling and servicing Thomas Built school buses, ASH provides vehicle maintenance service and parts for trucks, used buses, and other vehicles. ASH will now operate as a brand under the ownership of W.W. Williams.

Financial terms of the acquisition were not disclosed.

W.W. Williams, which is a portfolio company of One Equity Partners, provides mechanical repair services and products for commercial trucks, diesel power generators, warehousing, inventory management, and logistics services.

“ASH and W.W. Williams share many qualities, including culture, a dedication to highly professional service, and strong relationships with our customers,” said John Simmons, CEO of W.W. Williams. “This transaction significantly expands our market share, geographic presence, sales volume, end-to-end specialty service maintenance and repair offerings, and it enhances our ‘bumper to bumper’ customer relationships.”

ASH, founded in 1941, is headquartered in Phoenix and has three facilities for bus and truck equipment service. The dealership reportedly serviced more than 2,500 customers in 2016. CEO Mike Iben will continue to manage ASH and will assume additional responsibilities at the company.

“We believe joining W.W. Williams will further enhance our core competencies, including service offerings, sourcing capabilities, and together creates an opportunity to expand the company’s up-fitting capabilities on a regional and national basis,” Iben said.