Digital Realty is buying out Blackstone’s majority stake in a trio of Northern Virginia data centers totaling 288 megawatts of capacity that the two firms developed through a joint venture. The $3.5B cash-and-stock deal, expected to close Tuesday, will see Digital Realty acquire Blackstone’s 80% share of two 96 MW data centers in Manassas and 50% share of a 96 MW data center in Sterling. The facilities are fully leased to three different investment-grade tenants.