In October, Foro Energy Inc., a company the U.S. Department of Energy lists as based in Littleton, received a $9.2 million federal grant for its new geothermal-energy drilling technology.

Foro’s Littleton address appeared to be an empty office in a suburban office park, and little other information about the company, incorporated in Delaware in 2008, is available.

The company has received about $12 million in venture funding, according to news reports.

Eight grants, totaling about $38 million, went to large companies, such as DuPont Co. and General Motors Co. The remaining 16 grants went to small companies, including Littleton-based ITN Energy Systems Inc. ITN was founded in 1994 and has served as an incubator for four new companies, including Ascent Solar in Thornton and Infinite Power Solutions in Littleton.

Four of the small companies are spinoffs from research at the Massachusetts Institute of Technology, and three are collaborations with federal laboratories or universities.

The company received a $4 million Department of Energy grant.

Veveo, an Internet video company that is backed by $28 million in venture funding from Matrix Partners, Norwest Venture Partners, OmniCapital Group and North Bridge.