ATG Rehab has announced it has merged with United Seating & Mobility.

ATG Rehab, a portfolio company of Boston-based middle market investor Audax Group, is a Rocky Hill, Conn.-based provider of wheelchairs and other complex mobility equipment.

United Seating & Mobility, a portfolio company of Philadelphia-based middle market investor LLR Partners, is a St. Louis, Mo.-based mobility and rehab equipment supplier.

A new name for the combined entity will be announced in the future.