Renewable Energy Group, the largest producer of biodiesel in the US, has raised $72 million in its initial public offering (IPO), only about two thirds of its target. The 7.2 million shares were priced at $10.00 each, below the $13-15 bankers for the company, based in Ames, Iowa, initially proposed. It will start trading on the Nasdaq Global Market today. Renewable Energy Group markets and distributes biodiesel throughout the US and operates six biodiesel plants, with a production capacity of 212 million gallons per year. The company reported revenues of $208 million in 2010, compared with $109 million in 2009...