Tecogen, which sells and services commercial natural gas-powered cogeneration systems, filed on Friday with the SEC to raise up to $5 million in an initial public offering. The Waltham, MA-based company, which was founded in 2000 and booked $15 million in sales for the 12 months ended September 30, 2013, plans to list on the NASDAQ under the symbol TGEN. The company previously set terms to raise $20 million in September 2013, but withdrew in October. Scarsdale Equities is the sole bookrunner on the deal. No pricing terms were disclosed.
