The Jefferies-advised deal extends the firm's ownership of a portfolio of properties from its 2015-vintage White Rock Fund II platform.
Evercore and Morgan Stanley acted as financial advisers to Amulet on the transaction, while Kirkland & Ellis served as legal adviser. Debevoise & Plimpton advised StepStone.
The vehicle involves a portfolio of Bakken oil and gas properties previously held in the manager's 2014-vintage Fund III.
The transaction, expected to close in Q4, will support the growth of AREP's investment and development platform, including its vertically integrated data center strategy.
The 2021-formed New York-based GP focuses on growth and repositioning opportunities across healthcare services.
The potential vehicle follows Antin's July agreement to sell ~30% of the asset to GLIL Infrastructure from its €3.6 billion Fund III.