Item 10. Directors, Executive Officers, and Corporate Governance

CoStar Group has adopted a Code of Conduct for its directors. In addition, CoStar Group has adopted a separate Code of Business Conduct and Ethics for its officers and employees, including its principal executive, financial and accounting officers, or persons performing similar functions. Copies of each of these codes may be found in the “Investors” section of the Company’s website at https://investors.costargroup.com/leadership. We intend to disclose future amendments to certain provisions of our Codes, or waivers of such provisions granted to executive officers and directors, as required by the SEC rules on the Company's website within four business days following the date of such amendment or waiver.

We have adopted an Insider Trading Compliance Policy that governs the purchase, sale, and/or other dispositions of our securities by directors, officers and employees that is reasonably designed to promote compliance with insider trading laws, rules and regulations and NYSE listing standards. A copy of our Insider Trading Compliance Policy is filed as Exhibit 19.1 to this Report.

The remaining information required by this Item is incorporated by reference to our Proxy Statement for our 2025 annual meeting of stockholders under the captions “Director Nominees,” “Executive Officers,” Corporate Governance Highlights,” “Board Committees,” “Insider trading arrangements and policies,” and, if applicable, “Delinquent Section 16(a) Reports.”