Germantown-based Intrexon Corp. a synthetic biology company, plans to raise up to $150 million though a secondary offering of common stock, the company said late Tuesday. Intrexon (NYSE: XON) was trading at around $29 a share Wednesday. Led by biotech billionaire Randal Kirk, who serves as chairman and CEO and is the company's largest financier, Intrexon raised $160 million when it went public in 2013.
