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Rossmann, CoStar Group's Managing Director, Europe, brings more than two decades of financial and operational leadership — over the past two years reducing the Company's European cost structure by 25% while delivering double-digit revenue growth and launching CoStar in France

ARLINGTON, Va.--(BUSINESS WIRE)--Jul. 13, 2026-- CoStar Group, Inc. (NASDAQ: CSGP), a leading provider of online real estate marketplaces, information, and analytics in the property markets, today announced the appointment of Robin Rossmann as Chief Financial Officer, effective July 31, 2026, succeeding Christian Lown, who is stepping down to pursue an opportunity outside the Company's industry. Rossmann will report to Andy Florance, Founder and Chief Executive Officer of CoStar Group.

Rossmann will lead CoStar Group's global finance organization, overseeing the Company's financial and operational performance, capital allocation, financial planning and investor engagement as CoStar Group continues to expand its global platforms, increase profitability and create long-term value for shareholders.

Rossmann currently serves as CoStar Group's Managing Director, Europe, and is a member of the Company's executive leadership team. Over the past two years, he has distinguished himself by dramatically improving the margins of CoStar Group's European business — eliminating approximately $51 million in costs, roughly 25% of the European cost structure — while delivering double-digit revenue growth and launching CoStar in France. Rossmann joined STR in 2016, leading its businesses across EMEA, Asia Pacific and Latin America, and became part of CoStar Group through the Company's acquisition of STR in 2019. Over the past decade with STR and CoStar Group, he has played a central role in launching CoStar Group products across global markets, executing and integrating acquisitions, scaling international operations and advancing strategic initiatives that have strengthened the Company's competitive position.

"Robin is a rare executive who combines deep financial expertise with proven operating leadership and a demonstrated ability to dramatically reduce costs while accelerating growth," said Andy Florance, Founder and Chief Executive Officer of CoStar Group. "During his time with CoStar Group, he has consistently delivered outstanding operating performance across our international businesses — driving strong organic revenue growth, expanding margins, successfully integrating acquisitions and launching our products in new markets. Robin knows our business, strategy and culture exceptionally well, and is deeply respected across our leadership team. I look forward to partnering with him as we sharpen our focus on margin expansion and profitable growth."

"CoStar Group has built one of the strongest and most differentiated real estate technology companies in the world," said Rossmann. "I am honored to assume the role of Chief Financial Officer at such an exciting point in the Company's evolution. I look forward to partnering with Andy, our leadership team and our employees to drive disciplined capital allocation, enhance operational efficiency, expand margins and support continued profitable growth while delivering long-term value for our shareholders."

Prior to joining STR, Rossmann, a Chartered Accountant, spent 13 years at Deloitte, where he served as a Senior Director advising many of the world's leading public and private real estate and hospitality companies across the United States, the United Kingdom and other international markets. His experience included financial assurance, internal controls and risk management, financial and commercial due diligence, capital markets transactions, debt advisory, valuation, business planning and investment appraisal.

Lown will step down as Chief Financial Officer effective July 31, 2026. His departure was not the result of any disagreement with the Company relating to the Company's operations, policies or practices.

"On behalf of the Board of Directors and the entire CoStar Group team, I want to thank Chris for his contributions during his tenure with the Company," said Florance. "We appreciate his service and wish him continued success in his future endeavors."

About CoStar Group

CoStar Group (NASDAQ: CSGP) is a global leader in commercial real estate information, analytics, online marketplaces, and 3D digital twin technology. Founded in 1986, CoStar Group is dedicated to digitizing the world's real estate, empowering all people to discover properties, insights, and connections that improve their businesses and lives.

CoStar Group's major brands include CoStar, a leading global provider of commercial real estate data, analytics, and news; LoopNet, the most trafficked commercial real estate marketplace; Apartments.com, the leading platform for apartment rentals; Homes.com, the fastest-growing residential real estate marketplace; and Domain, one of Australia's leading property marketplaces. The Company's industry-leading brands also include Matterport, a leading spatial data company whose platform turns buildings into data to make every space more valuable and accessible; STR, a global leader in hospitality data and benchmarking; Ten-X, an online platform for commercial real estate auctions and negotiated bids; and OnTheMarket, a leading residential property portal in the United Kingdom.

CoStar Group's websites attracted 131 million average monthly unique visitors in the first quarter of 2026, serving clients around the world. Headquartered in Arlington, Virginia, the Company is committed to transforming the real estate industry through innovative technology and comprehensive market intelligence. From time to time, CoStar Group plans to utilize its corporate website as a channel of distribution for material Company information. For more information, visit www.CoStarGroup.com.

This news release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about CoStar Group's plans, objectives, expectations, beliefs and intentions and other statements including words such as “hope,” “anticipate,” “may,” “likely,” “might,” “believe,” “expect,” “observe,” “consider,” “think,” “intend,” “envision,” “will,” “should,” “could,” “would,” “plan,” “target,” “goal,” “estimate,” “predict,” “continue,” “commit,” and “potential” or the negative of these terms or other comparable terminology. Such statements are based upon the current beliefs and expectations of management of CoStar Group and are subject to many risks and uncertainties. Actual results may differ materially from the results anticipated in the forward-looking statements and the assumptions and estimates used as a basis for the forward-looking statements. The following factors, among others, could cause or contribute to such differences: our inability to attract and retain new clients; our inability to successfully develop and introduce new or updated online marketplace services, information, and analytics; our inability to compete successfully against existing or future competitors in attracting advertisers and in general; the effects of fluctuations and market cyclicality; the effects of global economic uncertainties and downturns or a downturn or consolidation in the real estate industry; our inability to hire qualified persons for, or retain and continue to develop our sales force, or unproductivity of our sales force; our inability to retain and attract highly capable management and operating personnel; the downward pressure that our internal and external investments may place on our operating margins; our inability to increase brand awareness; our inability to maintain or increase internet traffic to our marketplaces, and the risk that the methods, including Google Analytics, that we use to measure average monthly unique visitors to our portals may misstate the actual number of unique persons who visit our network of mobile applications and websites for a given month or may differ from the methods used by competitors; our inability to attract new advertisers; our inability to successfully identify, finance, integrate, and/or manage costs related to acquisitions; our inability to complete certain strategic transactions if a proposed transaction is subject to review or approval by regulatory authorities pursuant to applicable laws or regulations; our inability to realize the benefits of the acquisitions of Matterport, LLC (“Matterport”) and Domain Holdings Australia Pty Limited; the inability of third-party suppliers upon which Matterport relies to fulfill its needs; the effects of cyberattacks and security vulnerabilities, and technical problems or disruptions; the significant costs associated with undertaking a large infrastructure project; our inability to generate increased revenues from our current or future geographic expansion plans; the risks related to acceptance of credit cards and debit cards and facilitation of other customer payments; the effects of climate-related events and other events beyond our control; the effects related to attention to climate-related risks and opportunities; our inability to obtain and maintain accurate, comprehensive, or reliable data; our inability to obtain and maintain stable data feeds, or disruption of our data feeds; our inability to enforce or defend our ownership and use of intellectual property; the effects of use of new and evolving technologies, including artificial intelligence, on our ability to protect our data and intellectual property from misappropriation by third parties; our inability to defend against potential legal liability for collecting, displaying, or distributing information; our inability to obtain or retain listings from real estate brokers, agents, property owners, and apartment property managers; our inability to maintain or establish relationships with third-party listing providers; our inability to comply with the rules and compliance requirements of Multiple Listing Services; the risks related to open source software; the risks related to international operations; the effects of foreign currency exchange rate fluctuations; our indebtedness; the effects of a lowering or withdrawal of the ratings assigned to our debt securities by rating agencies; the effects of any actual or perceived failure to comply with privacy or data protection laws, regulations, or standards; the effects of changes in tax laws, regulations, or fiscal and tax policies; the effects of third-party claims, litigation, regulatory proceedings, or government investigations; the risks related to return on investment; and the risks related to the specific timing, price, and size of repurchases under the Stock Repurchase Program, including that the Stock Repurchase Program may be suspended or discontinued at any time at the Company’s discretion. More information about potential factors that could cause results to differ materially from those anticipated in the forward-looking statements include, but are not limited to, those stated in CoStar Group’s filings from time to time with the Securities and Exchange Commission (the “SEC”), including in CoStar Group’s Annual Reports on Form 10-K and Quarterly Reports on Form 10-Q, each of which is filed with the SEC, including in the “Risk Factors” section of those filings, as well as CoStar Group’s other filings with the SEC (including Current Reports on Form 8-K) available at the SEC’s website (www.sec.gov). All forward-looking statements are based on information available to CoStar Group on the date hereof, and CoStar Group assumes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by applicable law.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260713920486/en/

Media Contact:
Matthew Blocher
CoStar Group Corporate Marketing & Communications
mblocher@costar.com

Source: CoStar Group