ABC Company, a Designer of Computer Software, Had a Number

ABC Company, a designer of computer software, had a number of new products ready to launch. Sean, a seller of office supplies to ABC Company, was talking with Yumi, the president of the company, regarding a product order. Yumi was called away from her office for a few minutes, and Sean, who liked to be curious, took the opportunity to go through the papers on her desk. Sean discovered a description of the new software products. He immediately bought lots of ABC Company stock and made a significant profit following the public announcement of the new software and the resulting increase in the price of ABC Company stock. Is there any theory on which Sean could be held liable for a securities violation, and, if so, what? Describe any such theory.