(Reuters) - CoStar Group Inc CSGP.O and a private equity consortium led by Warburg Pincus and GTCR are among the bidders seeking to acquire U.S. property data and analytics company CoreLogic Inc CLGX.N, people familiar with the matter said on Wednesday. The interest in CoreLogic comes after investment firms Cannae Holdings Inc CNNE.N and Senator Investment Group LP made a $7 billion offer for the company and launched a campaign to take over its board of directors. Cannae and Senator, whose latest offer was for $66 per share in cash, are not being allowed to carry out due diligence on CoreLogic because the company considers their bid too low, the sources said, requesting anonymity because the matter is confidential.