TowerBrook Capital Partners and Ascension Capital have completed a strategic investment in Regent Surgical Health, according to a news release.

Regent Surgical Health, headquartered in Chicago and Nashville, Tenn., partners with hospitals and physicians to develop, own and manage ambulatory surgery centers (ASCs). Founded in 2001, Regent currently owns or operates 21 ASCs across the United States.

TowerBrook, which has its U.S. operations based out of New York, is an investment management firm that invests in private equity and structured opportunities through its family of funds. Founded in 2005, the firm’s private equity strategy primarily pursues control-oriented investments in large and middle market companies in North America and Europe.

Ascension Capital is an investment affiliate of Ascension, the nation’s largest nonprofit and Catholic health system.

Terms of the investment were not disclosed.

In conjunction with the investment, Ascension selected Regent as its exclusive national partner for ASC development.