Texan oil exploration and production company Cobalt International Energy Inc. has commenced a public offering of 50,000,000 shares of common stock, all of which will be offered by selling stockholders affiliated with U.S. and Canadian private equity firms First Reserve Corp., Goldman, Sachs & Co., Riverstone Holdings, The Carlyle Group, and KERN Partners. Cobalt was acquired by these firms at the time of its establishment in 2005, and went public in 2009.

Trilantic Capital Partners and Riverstone Holdings have invested in Trail Ridge Energy Partners II. Financial terms weren’t announced. Trail Ridge is a newly-formed oil and gas exploration and production company focused primarily in the Permian Basin in West Texas.  Stifel Nicolaus advised Trail Ridge in regards to financing.

Riverstone Holdings is to acquire Utex from investment funds affiliated with Rhône Capital. Financial terms of the transaction were not disclosed.

Talos Energy said Wednesday it has closed its buy of Energy Resource Technology GOM, the oil and gas subsidiary of Helix Energy Solutions Group.The deal was valued at $620 million. Talos is backed by Apollo Global Management and Riverstone Holdings.

Exelon has completed the sale of its three Maryland coal-fired power plants to Raven Power Holdings. Raven Power is a new portfolio company of Riverstone Holdings.

Meritage Midstream Services II has partnered with Riverstone Holdings to pursue midstream opportunities in North America’s emerging resource plays. Riverstone will provide Meritage II with up to $500 million in private equity capital to focus on developing midstream systems to serve producers of natural gas and natural gas liquids. PRESS RELEASE Meritage Midstream Services II [...]

Fairfield Energy has raised up to $350 million from private equity firm Riverstone Holdings to help fund investment in oil and gas exploration and development in the British North Sea, writes Reuters. Fairfield said that the energy-focused private equity firm agreed to invest $150 million, with an option to top that up by an additional [...]

Goldman Sachs, The Carlyle Group, and Riverstone Holdings will sell 63 million of their common shares of publicly Houston-based Kinder Morgan, one of the largest energy companies in North America. The private equity firms participated in a buyout of Kinder Morgan in 2006, led by founder Richard Kinder. The company went public again in February 2011. [...]

Concho Resources is to buy all of the oil and natural gas assets of Three Rivers Operating Company, a portfolio company of private equity firm Riverstone Holdings, for $1 billion in cash, writes Reuters. Three Rivers owns 200,000 net acres in the Permian Basin, an area spanning Texas and New Mexico. PRESS RELEASE Concho Resources [...]

Apollo Global Management and Riverstone Holdings are investing up to $600 million in Talos Energy. Houston-based Talos will focus on oil and gas acquisition opportunities along the Gulf Coast and Gulf of Mexico. PRESS RELEASE Talos Energy LLC (“Talos”) today announced that it has partnered with investment funds affiliated with Apollo Global Management, LLC (NYSE: [...]