Here is a look at the ups and downs of Petroplus as Vitol, the world's largest oil trader, teamed up with Marcel Van Poecke, Petroplus's co-founder, to buy the insolvent refiner's Swiss plant.

Radiator Labs was named the top winner of the MIT Clean Energy Prize for a radiator retrofit design that increases the energy efficiency of steam heating systems.

Osage Exploration and Development, Inc., has financed the drilling of its Nemaha Ridge Horizontal Mississippian project .

Proserv is bolstering its rapidly-expanding subsea capabilities and specialist integrated services and increasing its workforce by more than 300 people.

Watsco, Inc. has completed the acquisition of 60% of Carrier’s heating, ventilation and air conditioning (HVAC) distribution network in Canada.

Williams Partners L.P. has completed its previously announced acquisition of Caiman Energy’s wholly owned subsidiary, Caiman Eastern Midstream, LLC.

Delta Air Lines is expected to buy a Pennsylvania oil refinery. With the deal to buy ConocoPhillips' Trainer, Pennsylvania, refinery expected to be confirmed imminently, some say that Delta, the country's No. 2 carrier, could have the last laugh.

Pipeline operator Energy Transfer Partners LP said it will buy Sunoco Inc for $5.3 billion in stock and cash.

The Halifax Group, a private equity firm that partners with management to invest in growing entrepreneurial companies, announced today that it has sold PolyPipe Holdings, Inc. (“PolyPipe”) to Dura-Line Holdings, Inc. Terms of the sale were not disclosed.

First Look West (FLoW), the largest clean energy business plan competition in the western United States, has tapped the depth of innovative talent in university students. These students are helping to create the clean energy future through their promising clean energy business ventures.