Gevo, a renewable chemicals and advanced biofuels company that produces a fuel blendstock (isobutanol), filed on Thursday with the SEC to raise up to $150 million in an initial public offering. The Englewood, CO-based company, which was founded in 2005 as Methanotech and booked $1 million in sales last year, believes isobutanol can be used as a building block in raw materials that will function as drop-in alternatives to petroleum-based products. Gevo plans to list on the NASDAQ under the symbol GEVO. UBS Investment Bank and Goldman, Sachs & Co. are the lead underwriters on the deal, for which pricing terms and timing were not disclosed.