Chesapeake Midstream Partners, an L.P. formed by Chesapeake Energy and GIP to operate natural gas gathering systems, will see its quiet period end on Monday, September 6th. On July 28th, the company raised $446 million by offering 21.25 million shares at $21, at high end of the range of $19-$21. UBS Investment Bank, Citi and Morgan Stanley acted as lead managers on the deal.