Mid-market private equity investor FFL Partners has backed therapy business Autism Learning Partners (ALP) in a deal worth more than $270m.

The deal marks the firm’s ninth healthcare investment, and its 20th portfolio buy.

ALP is a provider of applied behaviour analysis therapy for children and adults with autism spectrum disorders and developmental disabilities. It was founded in 1988 in Southern California, and offers services that aim to improve communication. It also offers group therapy programmes and speech programmes to improve social interaction.

It has a presence in 46 states, and has increased steadily since 2010.

The firm’s investment will help the business move into the “underserved” personalised patient care market.

FFL Partner Aaron Money said, Partner at FFL Partners. “We are excited about working with ALP CEO and President Jeffrey Winter and his team, to explore additional opportunities for building on the company’s successful growth in its core markets and other geographies.”

The San Francisco-based firm has more than $4.5bn under management across four funds.

It is currently investing out of FFL Capital Partners IV, which closed on $2bn in 2015.

This article originally appeared in an article on AltAssest.