Macquarie Infrastructure Co LLC said it would buy the 50 percent stake in liquids storage provider International-Matex Tank Terminals (IMTT) that it does not control for $1.03 billion in cash and stock. Macquarie, which owns half of IMTT since 2006, said it expects the deal to add to its free cash flow this year given "a number of opportunities" to implement better expense controls and processes at the liquids storage provider. Macquarie said it would pay $910 million in cash and the rest in stock to buy out the remaining stake from IMTT's founding Coleman family, at least three of whom are expected to retire after the deal closes later this month.