Lieff Cabraser Heimann and Bernstein, LLP is investigating suspected anticompetitive conduct by CoStar Group, Inc. and its subsidiary LoopNet in the U.S. markets for commercial real estate listing and information services.

The firm is examining whether CoStar has maintained its market power through exclusionary agreements, technical obstacles to data portability, and intimidation tactics designed to discourage customers from switching to competing platforms. These tactics may have resulted in higher subscription costs for landlords and brokers of commercial real estate, and reduced the range of competitive alternatives available to them.

Landlords and brokers who subscribe to CoStar or LoopNet are invited to contact the firm confidentially at 415-956-1000 to discuss their experiences or use the form below.