Vestar Capital Partners, a U.S. middle-market private equity firm, has made a strategic growth investment in Nox Health, a global sleep health company.

The investment looks to support Nox’s development of its sleep diagnostic technology and services as well as the adoption of its sleep management services for employers and health plans. The company is headquartered in Atlanta, Ga. with operations in Reykjavík, Iceland and Denver, Colo.

“We are delighted to welcome Vestar as a strategic investment partner to help us accelerate our growth. We were looking for a partner with relevant and credible experience and found it in Vestar,” says Sigurjon Kristjansson, Nox Health CEO. “At Nox, we enable a consumer-centric experience, leveraging our state-of-the-art technology portfolio and value-based sleep management solutions to simplify access, reduce costs and improve health outcomes.”

Canaccord Genuity served as financial advisor to Nox Health, and Bryan Cave Leighton Paisner LLP acted as its legal counsel.  Solomon Partners served as financial advisor to Vestar, and Kirkland & Ellis LLP provided legal counsel.