Governance Documents

On December 17, 2025, CoStar Group, Inc.’s  Board of Directors approved an updated Code of Business Conduct & Ethics, which included the following revisions, among other items:

• a letter to employees from Founder & CEO, Andy Florance
• a reorganization of the sections of the Code of Business Conduct & Ethics around the following:
• a commitment to excellence and ethical conduct;
• acting with integrity;
• protecting CoStar assets;
• compliance with laws, rules and regulations; and
• our culture and our community
• a graphic to provide guidance if a gift is appropriate in the business context; a reference to the Company’s social media policy;  and a new section on the responsible use of large learning models; and
• a resource page to identify CoStar contacts to answer questions.