NEW YORK--(BUSINESS WIRE)--Blackstone (NYSE: BX) announced today that private equity funds it manages have agreed to sell AlliedBarton to Wendel SE (EPA: MF) for approximately $1.67 billion. The transaction is expected to close later this year, and is subject to customary regulatory approvals. AlliedBarton is a leading U.S.-based provider of security services to more than 3,300 customers, including 200 members of the Fortune 500. Founded in 1957 and based in suburban-Philadelphia, AlliedBarton