Plug Power Inc. (Nasdaq: PLUG) is making advances in fuel cell technology, and today announced its advancements in the stock market. The company was included in the June 13, 2008 preliminary list of Russell 3000 Index members.

The Russell’s indexes represent 4,000 of the largest U.S. stocks as of the end of May. Plug’s inclusion in the Russell 3000 remains in place for one year, and includes automatic inclusion to the small cap Russell 2000 Index as well.

“We’re pleased that Plug Power was included in the Russell 2000 Index of small-cap companies, further validating our leadership position within the fuel cell sector. We believe the inclusion will raise the visibility of our stock specifically, and alternative energy stocks in general, within the investor community,” Andy Marsh, president and CEO of Plug Power stated in the press release. “Our expectation is that investment managers and institutional investors will hold Plug Power stock as part of their long-term investment strategies.”

Plug focuses its operations on the integration of fuel cell technology and motive, backup power products, targeting both private and public customers around the world. The company’s Proton Exchange Membrane (PEM) fuel system, GenCore, provides back-up power to businesses and governments with critical infrastructure.

GenDrive is the company’s hydrogen powered PEM, providing motive power to light industrial vehicles. In addition, Plug is developing software and hardware accessories for custom interface solutions, as well as natural gas or liquid petroleum gas-fueled power systems for commercial and residential applications.

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