Speech Pathology Group (SPG), a portfolio company of Ridgemont Equity Partners, has acquired Comprehensive Autism Center (CAC), according to a news release.

Founded in 1993, Ridgemont is focused on investing in middle market companies to secure majority ownership or be the lead minority investor. Based in Charlotte, N.C., the firm prefers to make more substantial investments from a dollars perspective in several sectors, including healthcare.

SPG is comprised of a team of speech-language pathologists, behavioral specialists and school psychologists serving adults and children in the San Francisco Bay Area.

CAC is an autism services provider offering in-home and center-based applied behavior analysis therapies to pre- and early school-aged clients throughout Southern California.

CAC was advised by Provident Healthcare Partners. Formed in 1998, Provident seeks investments in middle market healthcare companies. With offices in Boston and Los Angeles, the firm is the healthcare investment banking division of Provident Corporate Finance.

Terms of the transaction were not disclosed.