Industrials vacuum manufacturer Edwards Group Ltd. begins trading on the Nasdaq Friday, May 11, under the ticker EVAC. After pricing lower than expected at $8 per share, Edwards raised $100 million in its initial public offering. CEO Matthew Taylor explains that the timing was right for an IPO because profit margins are up and they're "strongly cash generative." Taylor expects that the company's market will continue to expand as everything from semiconductor plants to iPad-manufacturing facilities rely on their vacuum technology. - Katie Roof