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Timonium-based Greenspring Energy continues rapid growth

Greenspring Energy LLC, a Timonium-based installer of residential and commercial solar energy systems, is the top Maryland-based company in the 2011 Inc. magazine’s 500/5,000 ranking of the fastest-growing private companies in America.

Greenspring Energy placed 15th in the U.S. with revenue growth of 8,730 percent between 2007 and 2010.

Two other Maryland companies are in the top 100: Millennenial Media Inc. of Baltimore, a developer of mobile advertising, which placed 74th with three-year revenue growth of 3,080 percent; and WhiteOak Group of Easton, an information technology provider primarily to the U.S. government, which is ranked 88th with growth of 2,856 percent over the three-year period.

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