Bloom EnergyCorp. has reportedly filed a "confidential" registrationfor an IPO, according to an Oct. 6 report from The Wall Street Journal.

The company, which in 2011 was valued at $2.9 billion, filedwith the U.S. SEC to go public under the Jumpstart Our Business Startups Act,which allows companies with less than $1 billion in revenue to registerprivately with the SEC.

Stakeholders in the company were reported to includeNew EnterpriseAssociates, ApexVenture Partners, TriplePoint Capital LLC, , CreditSuisse Group, DAG VenturesLLC, E.ON Venture Partners, Goldman Sachs Ventures and . The investorsalso include pension funds, including the Alberta Investment Management Corp.and the New Zealand Superannuation Fund.