Aspen Aerogels has officially hit the NYSE, trading under the symbol ASPN. The company priced its IPO at $11 per share (lower than its expected range) and raised $82.5 million. The stock closed its first day down $.25 after hitting a high of $11.12 during the day. Aspen Aerogels designs, develops and manufactures high-performance aerogel insulation used in large-scale energy infrastructure facilities. Fidelity Investments (29.8% after-IPO stake), Reservoir Capital Partners (10.3%), GKFF Ventures (7.8%) and Arcapita Ventures (4.7%) remain stockholders in the company.