HOUSTON--(BUSINESS WIRE)--Plains All American Pipeline, L.P. (NYSE: PAA) and Plains GP Holdings (NYSE: PAGP) announced the closing of the transactions (the “Simplification Transactions”) contemplated by the July 11, 2016 Simplification Agreement entered into by such parties and certain affiliated entities (the “Simplification Agreement”). In satisfaction of one of the conditions to the closing of the Simplification Transactions, PAGP also announced that, at…