Private equity deals

First Reserve has committed up to $500 million for the formation of Century Midstream LLC, a new midstream energy company focused on emerging liquids and liquids-rich shale plays in North America. The founding management team previously was with NiSource (NYSE: NI). www.firstreserve.com One Rock Capital Partners has acquired Summit Research Labs Inc., a Huguenot, N.Y.-based maker of the active ingredients used in antiperspirants. No financial terms were disclosed. Babson Capital Management provided an equity co-investment to MORE