Important Additional Information Regarding the Proposed Transaction Will Be Filed with the SEC and Where to Find It

In connection with the proposed transaction, CoStar intends to file with the SEC a registration statement on Form S-4 (the “Registration Statement”) to register the shares of CoStar’s common stock to be issued in connection with the proposed transaction. The Registration Statement will include a document that serves as a prospectus of CoStar and proxy statement of Matterport (the “proxy statement/prospectus”), and each party will file other documents regarding the proposed transaction with the SEC. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, INCLUDING THE PROXY STATEMENT/PROSPECTUS, AS EACH MAY BE AMENDED OR SUPPLEMENTED FROM TIME TO TIME, AND OTHER RELEVANT DOCUMENTS FILED BY MATTERPORT AND COSTAR WITH THE SEC BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT MATTERPORT AND COSTAR, THE PROPOSED TRANSACTION, THE RISKS RELATED THERETO AND RELATED MATTERS.

After the Registration Statement has been declared effective, a definitive proxy statement/prospectus will be mailed to stockholders of Matterport as of the record date. Investors will be able to obtain free copies of the Registration Statement and the proxy statement/prospectus, as each may be amended from time to time, and other relevant documents filed by Matterport and CoStar with the SEC (when they become available) through the website maintained by the SEC at www.sec.gov. Copies of documents filed with the SEC by Matterport, including the proxy statement/prospectus (when available), will be available free of charge from Matterport’s website at investors matterport.com. Copies of documents filed with the SEC by CoStar, including the proxy statement/prospectus (when available), will be available free of charge from CoStar’s website at http://investors.costargroup.com/.

Participants in the Solicitation

Matterport and certain of its directors, executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies from Matterport’s stockholders with respect to the proposed transaction. Information about Matterport’s directors and executive officers is available in Matterport’s Annual Report on Form 10-K for the year ended December 31, 2023 filed with the SEC on February 27, 2024 and its definitive proxy statement for the 2023 annual meeting of stockholders filed with the SEC on April 27, 2023, and in the proxy statement/prospectus (when available). Other information regarding the participants in the solicitations and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the Registration Statement, the proxy statement/prospectus and other relevant materials to be filed with the SEC regarding the proposed transaction when they become available. Stockholders of Matterport, potential investors and other readers should read the proxy statement/prospectus carefully when it becomes available before making any voting or investment decisions.

No Offer or Solicitation

This communication is not intended to and shall not constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act.