CoStar Group Promotes Robin Rossmann to Chief Financial Officer
Jul 14, 2026 | By Startuprise io

CoStar Group, a provider of online real estate marketplaces, property information, and analytics, has appointed Robin Rossmann as it's Chief Financial Officer, effective July 31, 2026.
He will succeed Christian Lown, who is leaving the company to pursue an opportunity outside the real estate industry. Rossmann will report to CoStar Group Founder and Chief Executive Officer Andy Florance as he takes on the new role.
As Chief Financial Officer, Robin Rossmann will lead CoStar Group's global finance organization. He will oversee the companys financial performance, capital allocation, financial planning and investor relations. He will help support CoStar Group's continued global expansion, improve profitability, and create long-term value for shareholders.
Robin Rossmann currently serves as CoStar Group's Managing Director for Europe and is a member of the company's executive leadership team. Over the past two years, he has helped improve the performance of the European business by reducing costs by about $51 million while delivering double-digit revenue growth and launching CoStar in France.
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Rossmann joined STR in 2016, where he led the company's operations across Europe, the Middle East, Africa, Asia-Pacific, and Latin America. He became part of CoStar Group after it acquired STR in 2019.
Over the past decade, he has played a key role in expanding CoStar Group's products into new global markets, integrating acquisitions, growing international operations and supporting strategic initiatives that have strengthened the companys business.
"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."
"Robin is a rare executive who combines deep financial expertise with proven operating leadership and a demonstrated ability to reduce costs while accelerating growth dramatically," 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.
About CoStar Group
Founded in 1986 by Andy Florance, CoStar Group is a global real estate technology company that provides commercial real estate data, analytics, online marketplaces and 3D digital twin technology. The company helps businesses and individuals find properties, access market insights and make better real estate decisions.
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