Biofuels and biomaterials company Amyris’s stock held up in its first day of trading, closing last night at $16.50, up three percent from its opening price of $16. The stock peaked at $17.44, the San Francisco Chronicle writes. The report estimates about 2.4 million shares were traded yesterday. The stock was reportedly priced below range. Earth2Tech deemed the IPO a “decent exit” for investors, estimating the worth of investors stakes: $67 million for Kleiner Perkins, $62 million for Khosla Ventures. The company raised a total of $85 million.