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CoStar sues New York firms for alleged data theft

Daniel J. Sernovitz
CoStar sues New York firms for alleged data theft

CoStar Group Inc. (NASDAQ: CSGP) has filed a pair of federal lawsuits in New York over alleged usage violations, the latest in a larger crackdown by the D.C.-based commercial real estate data firm against the misuse of its proprietary information. Among the new lawsuits filed Monday in the U.S. District Court for New York's Eastern District, CoStar claims representatives for Hauppauge, New York-based Baron Realty Groups LLC "misappropriated enormous amounts of proprietary commercial real estate information" in downloading tens of millions of data points over a period of eight months and reposting some of that information to its website and Instagram account. In the second, it claims Woodbury, New York-based Realty Insight Group Inc. "developed a black market" to resell CoStar subscriptions to representatives for at least four other companies.