CEO Chris Lien hasn't been shy about plans to take Marin Software public in 2013. The San Francisco-based startup offers an online advertising management platform to customers to maximize client ad dollars. Since launching in 2006, Marin has opened 11 offices worldwide and grown to more than 400 employees, but the industry is growing even faster. Online ad spending is predicted to reach more than $100 billion in 2013, and Marin Software hopes to claim a piece of that pie. Revenues at Marin in 2012 will end up close to $58 million. The company has recently gone quiet regarding IPO plans, a sign that the process is underway.
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