Wexford Science & Technology LLC will soon again be under new ownership.

Chicago-based Ventas Inc. has agreed to pay $1.5 billion in cash to acquire substantially all of the assets of the Baltimore real estate investment and development firm from affiliates of Blackstone Real Estate Partners VIII L.P. Ventas will also assume $33 million of liabilities. The deal is expected to close in the fourth quarter.

Wexford was acquired in a $640 million deal by San Diego-based BioMed Realty Trust Inc. in 2013. Earlier this year, BioMed Realty sold to Blackstone, the private equity giant, in a deal valued at $8 billion.

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