Allied Capital, the private-equity firm owner of the Mercury Air Centers FBO chain, has agreed to sell its 24 FBOs to Macquarie Infrastructure, a publicly traded Australian company that also owns the Atlantic Aviation FBO chain. The $456.2 million deal includes 24 Allied Capital FBOs, which include Mercury Air Centers (purchased in 2004 from Mercury Air Group), Corporate Wings, FirstAir and IX Jet Center. All the FBOs will be rebranded as Atlantic Aviation. After the Allied Capital FBO purchase, expected to close in the third quarter, and another pending purchase of two Supermarine FBOs from American Airports, Atlantic Aviation will be the largest U.S. FBO chain with 68 bases. According to a spokesman, “Macquarie expects the purchase to add in excess of $35 million in EBITDA during its first year of ownership.”