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About
- Overview
- Mission & Values
- Brands
- DE&I
- Leadership
Corporate Responsibility
- Community
- ESG
INVESTORS
PRESS ROOM
Careers

Leadership

Overview
ESG
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Overview
ESG
News & Events
Stock Information
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Leadership
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Contact

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¹Effective January 1, 2021, CoStar Group amended its Code of Business Conduct and Ethics (the "Code"). In addition to non-substantive changes and reorganizing the order of some sections, revisions to the Code were made to clarify and provide more guidance on the Company’s conflicts of interest and anti-bribery policies, to iterate the Company’s commitment to diversity and an inclusive work environment and to provide examples and additional information about laws and regulations with which employees must comply. The amended Code of Conduct does not result in any waiver with respect to any officer, director or employee of the Company from any provision of the Code of Conduct as in effect prior to the Board's action to amend the Code of Conduct. The foregoing summary of the amended Code of Conduct is subject to and qualified in its entirety by reference to the full text of the amended Code of Conduct, accessible above.

888-226-7404
1331 L Street, NW
Washington, DC 20005

CoStar Group, Inc. (NASDAQ: CSGP)
is commercial real estate's leading
provider of information, analytics
and online marketplaces.

Company
Investors
Brands
- CoStar
- Apartments.com
- LoopNet
- Ten-X
- STR
- Homes.com
- Land.com
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Michael R. Klein, Chairman

Michael R. Klein has been the Chairman of our Board of Directors since he and Mr. Florance started the Company in 1987. Mr. Klein also currently serves as Chairman of the board of directors and Chief Executive Officer of The Sunlight Foundation, a non-profit public education organization which he founded in 2005, and as Vice Chairman of the board of directors, Lead Director, Chairman of the audit and corporate governance & nominating committees, and member of the compensation committee of Tutor Perini Corporation, a publicly-held construction company. From 1998 to 2011, he served on the board of directors of SRA International, Inc., a formerly publicly held provider of technology and strategic consulting services and solutions which was sold in June 2011. Mr. Klein is also a director of ASTAR Air Cargo, Inc., a privately held company. He also serves as Chairman of the board of directors of The Shakespeare Theatre Company, as a director and secretary of the American Himalayan Foundation, as a director of the NAACP Legal Defense and Education Fund, and as a trustee of the Aspen Music Festival and School and the Aspen Institutes. From 1974 through 2005, he was a partner of the law firm now known as Wilmer Cutler Pickering Hale & Dorr, LLP. Mr. Klein received a B.B.A. and a J.D. from the University of Miami and an L.L.M. from Harvard University.

As a result of his service on our Board of Directors since the Company’s inception, Mr. Klein has extensive knowledge of the commercial real estate, data provider and technology industries, as well as the Company’s products, services and business strategies. In addition to his role and tenure on our Board, Mr. Klein brings to the Board of Directors extensive experience through his service over the past 27 years on the boards of directors of the foregoing and other publicly-held companies, as well as several privately held businesses and non-profit organizations, including in the role of Chairman and Lead Director. Mr. Klein’s experience gained as a result of his involvement as a founder, director and/or investor in those entities over the past 27 years, including active participation in their business development and management, enables him to contribute significantly to the oversight and governance of the Company. Mr. Klein also has three decades of service as a corporate and securities lawyer with significant participation in corporate financings and mergers & acquisitions allowing him to provide valuable insight when evaluating or overseeing the Company’s business and growth strategies.

Andy Florance, Founder, Director, President, and Chief Executive Officer

Andy Florance is the Founder and Chief Executive Officer of CoStar Group. Since the company’s founding in 1986, he has led the digitization of the world's real estate, empowering people to discover properties, insights, and connections that improve their businesses and lives.

From founding the company in his dorm room to successful IPO in July 1998, Andy has led CoStar Group’s expansion to its market-leading position today as a publicly traded enterprise included in the S&P 500 Index (NASDAQ: CSGP), the NASDAQ 100 and its prominent spot as a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. CoStar Group serves more than one million clients in total, and its websites have received more than one billion visitors in the past twelve months alone.

Andy Florance's work has gained recognition across the industry, earning placements on Forbes’ 100 Most Innovative Growth Companies in the World, Forbes’ Fast Tech 25 and Fortune’s 100 Fastest Growing Companies. In the past year, Andy was named Globee Visionary Leader of the Year, Globee CEO of the Year, one of the 30 Most Powerful People in Commercial Real Estate Proptech by Commercial Observer, an Inman Power Player and was in the top Ten on the SP 200 Real Estate’s Most Powerful and Influential List.

Headquartered in Washington, D.C., CoStar Group employs a staff of more than 5,500 worldwide and maintains offices around the world to manage a wide range of industry-leading brands, including CoStar, the global leader in real estate information, analytics and data-driven news, Apartments.com, the most trafficked multifamily marketplace; LoopNet, the most trafficked CRE marketplace; Homes.com, the fastest growing residential marketplace; STR, the leading source of global hospitality insights and analysis; Ten-X, the leading platform for CRE online auctions; BizBuySell, the largest business-for-sale marketplace; and Land.com, the largest rural real estate marketplace in the country.

Andy Florance has co-authored a number of award-winning academic articles on commercial real estate economics. He currently serves on the Cathedral Chapter of the Washington National Cathedral, the Board of Visitors for Virginia Commonwealth University, and Management Leadership for Tomorrow, a nonprofit that works to aid the development of diverse leaders.

Mr. Florance is a graduate of Princeton University with a B.A. in Economics and received an honorary doctorate from Virginia Commonwealth University in 2019.

Angelique Brunner, Director

Angelique G. Brunner is the Founder and CEO of EB5 Capital. Founded in 2008, EB5 Capital is a $1+ billion commercial real estate investment firm with over 30 projects across all commercial real estate asset classes. The company has served over 1,900 clients, from 75+ countries, creating more than 35,000 U.S. jobs.

Over the course of her 30-year career, Ms. Brunner has worked in various aspects of capital markets, real estate, and early-stage funding. She’s an active global angel investor and advisor across industries including consumer goods, digital transformation, capital markets, energy, and software ventures. She is an active member of the U.S. Chamber of Commerce, Real Estate Executive Council (REEC), and Urban Land Institute (ULI).

In 2022 Ms. Brunner received a presidential appointment to the US Trade Representative’s (USTR) Trade Advisory Committee on Africa (TACA). Currently, she serves on the Board of Trustees for Brown University and on the Board of Governors for Brown University’s Watson Institute for International and Public Affairs. Additionally, she serves as an executive board member for the Marriott-Sorenson Center for Hospitality Leadership at Howard University School of Business.

Ms. Brunner brings extensive public boardroom experience in governance, compliance, and global strategy to CoStar Group, having previously served on the board of Chesapeake Lodging Trust and Cushman & Wakefield.

Ms. Brunner earned her Bachelor of Arts in Public Policy from Brown University and a Master in Public Affairs from Princeton University. She was a charter member of Americorps, serving with LISC in South Providence.

Michael J. Glosserman, Director

Michael J. Glosserman has served as a Managing Member of The JBG Companies, a real estate investment and development firm, since 1998, and is Chairman of its Executive Committee. He began his career as a staff attorney with the U.S. Department of Justice, shortly thereafter moving into commercial real estate investment and development with the Rouse Company in 1972 and then joining JBG in 1979. His non-professional affiliations include: Chairman Emeritus of the Board of Trustees, National Building Museum; Trustee, Federal City Council; and Advisory Board Member of the University of Pennsylvania Institute for Urban Research. He received a B.S. in Economics from the Wharton School at the University of Pennsylvania and received his J.D. from the University of Texas Law School. Mr. Glosserman has over 40 years of experience investing in, developing and owning commercial real estate. As a result of his experience, Mr. Glosserman brings to the Board significant business development, financial and commercial real estate industry expertise. As a user of commercial real estate information, Mr. Glosserman also provides the Board with a client’s perspective on the Company’s business development and mergers & acquisitions strategies, including valuable insight into the potential ‘fit’ of acquisition targets and the development and marketing of products and services.

John W. Hill, Director

John W. Hill is Founder and Chief Executive Officer of J Hill Group, a professional services practice specializing in assisting clients in improving their management operations. As of November 2013, Mr. Hill was named Chief Financial Officer of the City of Detroit, Michigan on a non-employment personal services contract. Prior to starting his consulting practice, from 2004 to 2012, Mr. Hill served as Chief Executive Officer of Federal City Council, a non-profit, non-partisan organization dedicated to improving the Nation’s Capital. Mr. Hill has previously served in multiple other executive and financial leadership positions, including as Chief Executive Officer of In2Books, Inc. and as a Partner at Andersen, LLP. Mr. Hill currently serves as a trustee, and the Chair of the compensation committee and as a member of the audit and nominating & corporate governance committees of Chesapeake Lodging Trust, a publicly traded REIT, and he previously served as a member of the audit committees of various public companies, including Highland Hospitality Inc., and various private entities, including Prestwick Pharmaceuticals, Inc. Mr. Hill also serves as President on the DC Public Library Board of Trustees, as Treasurer on The Shakespeare Theatre Company board of trustees, and as Chair of the board of directors of the National Minority Aids Council. Mr. Hill received a B.S. in Accounting from the University of Maryland, passed the CPA exam and became a Certified Public Accountant in 1977.

Through his current and previous positions, Mr. Hill has gained over 30 years of experience in accounting, auditing and financial matters, as well as significant management expertise. As a result of his extensive experience, Mr. Hill brings to the Board valuable financial knowledge and executive management experience.

Laura C. Kaplan, Director

A corporate and non-profit board member and adviser, Laura has more than 24 years of executive level experience in public policy, communications, corporate governance, and stakeholder engagement in the public, private and non-profit sectors. As the Principal-in-Charge of Government, Regulatory Affairs and Public Policy for global professional services and accounting firm PricewaterhouseCoopers, Laura has spent a decade on the executive management team of PwC and almost 12 years managing PwC’s public policy engagement strategy, which coordinates public policy strategies across the more than 150 countries in which PwC operates. She has also advised a broad range of c-suite level clients, and has significant experience building coalitions and partnerships to advance issues and policies.

Laura created the integrated public policy strategy that PwC employs today, as well as the firm’s political engagement strategy that aims to increase diversity in public policy and elected office. She also created and cultivated unique partnerships with NGOs to further PwC’s commitment to diversity in the women’s political engagement space. The Public Policy Intern Leaders program and curriculum she developed at PwC is recognized for combining the latest thinking in public policy and political engagement with PwC’s approach to leadership development. Laura also led and served in leadership positions at the American Institute of Certified Professional Accountants (AICPA) and the Center for Audit Quality.

Laura writes a regular blog and has been published in Fortune Magazine, The Huffington Post, World Economic Forum Blog, among others, and speaks before a range of audiences from c-suite executives and corporate boards to students and community leaders.

Prior to joining PwC, Laura served in senior positions at the U.S. Securities and Exchange Commission, and the U.S. Department of the Treasury, where she focused on the legislative and regulatory response to corporate governance and accounting failures in the late 1990s, and on the implementation of the Sarbanes-Oxley Act of 2002. She spent almost 10 years on Capitol Hill as a senior communications strategist.

In addition to her corporate board directorship, Laura consults with and serves on a number of non-profit boards, including Running Start, All In Together, the American Council on Germany, and Empowered Women. She also serves on the Advisory Committee for the Bush School of Public Policy at Texas A&M University, and is a member of the Economic Club of Washington.

In 2016, Laura received the Alice Paul Alumnae award from American University for her work on women’s political engagement. In 2015, Laura was named one of Washingtonian Magazine’s 100 Most Powerful Women in Washington.

Laura received a Master’s degree from American University in Washington, D.C. and a Bachelor’s degree from the University of Texas in Austin. Laura and her husband Joel live in Chevy Chase, MD with their two children.

Robert Musslewhite, Director

Robert Musslewhite has been the Chief Executive Officer of OptumInsight, Optum’s health services business connecting the health care system with services, analytics, and platforms designed to make clinical and administrative processes easier and more efficient, since August 2019. He joined Optum following Optum’s acquisition of The Advisory Board Company, a publicly traded company that provided best practices research and insight, technology, data-enabled services and consulting services, where he served as Chief Executive Officer from 2008 until 2017 and Chairman from 2013 to 2017. Prior to his appointment as Chief Executive Officer of OptumInsight, Mr. Musslewhite served as Chief Executive Officer of Optum360 from March 2019 until August 2019 and, prior to that, as Chief Executive Officer of Optum Analytics and Chief Executive Officer of Advisory Board Research from 2017 until March 2019. Prior to joining The Advisory Board Company, Mr. Musslewhite was an Associate Principal with McKinsey & Company, a global management consulting firm, in the Washington, D.C., Amsterdam, and Dallas offices. Mr. Musslewhite currently serves on the Board of Directors of Ascend Learning and is Chair of the Board of Governors of St. Albans School. Mr. Musslewhite received a J.D. from Harvard Law School and an A.B. in Economics from Princeton University.

Christopher J. Nassetta, Director

Christopher J. Nassetta has been the President and Chief Executive Officer of Hilton Worldwide (fka Hilton Hotels corporation), a global hospitality company, since December 2007. Prior to joining Hilton Worldwide, Mr. Nassetta served as the President and Chief Executive Officer of Host Hotels & Resorts (fka Host Marriott Corporation), a lodging real estate investment trust and owner of luxury and upper upscale hotels, from May 2000 to December 2007. Mr. Nassetta joined Host Hotels & Resorts in 1995 as Executive Vice President and was elected the Chief Operating Officer in 1997. Prior to joining Host Hotels & Resorts, Mr. Nassetta served as President of Bailey Realty Corporation from 1991 until 1995, and he had previously served as Chief Development Officer and in various other positions with the Oliver Carr Company from 1984 through 1991. Mr. Nassetta serves as a member of the Real Estate Roundtable, as an Advisory Board member for the McIntire School of Commerce at the University of Virginia, and as Vice Chairman of the Corporate Fund for The John F. Kennedy Center for the Performing Arts. Mr. Nassetta is a member of Federal City Council, a member of the Steering Committee of Partners for a New Beginning, and is on the boards of the International Youth Foundation, the Wolf Trap Foundation for the Performing Arts, and the Economic Club of Washington, D.C. Mr. Nassetta previously served on the board of directors of Host Hotels & Resorts. Mr. Nassetta received a degree in finance from the University of Virginia McIntire School of Commerce. Through his current and previous positions, Mr. Nassetta brings to the Board significant operational and business development experience, mergers & acquisitions experience, public company board and management experience, leadership experience, as well as commercial real estate industry expertise. As a user of commercial real estate information, Mr. Nassetta also provides the Board with a client’s perspective on the Company’s business development and mergers & acquisitions strategies, including valuable insight into the potential “fit” of acquisition targets and the development and marketing of products and services.

Louise S. Sams, Director

Louise S. Sams was the Executive Vice President and General Counsel of Turner Broadcasting System, Inc., a television and media conglomerate, from 2000 until September 2019. Ms. Sams also served as President, Turner Broadcasting System International, Inc. from September 2003 until May 2012. As General Counsel, Ms. Sams oversaw legal work relating to all of the business activities of Turner and its subsidiaries worldwide. She managed a global legal department, overseeing licensing, clearance and production of content for the Turner television networks and related media services; the sale and distribution of those networks; protection of intellectual property; employment matters; litigation; and transactional work, such as acquisitions and joint ventures. Most recently, Ms. Sams’ focus was on issues related to technology, information security, use of data and consumer privacy, as well as enterprise-wide risk management. In her role as President, Turner Broadcasting System International, Inc., Ms. Sams was responsible for production, distribution and ad sales relating to all kids and entertainment television networks and media services offered by Turner outside of the U.S. and Canada; distribution and commercial operations of CNN’s international services; and Turner’s international joint ventures. Prior to joining Turner in 1993 as a corporate attorney, Ms. Sams was an associate at White & Case, specializing in mergers and acquisitions and securities law. Ms. Sams currently serves on the following non-profit boards: Princeton University, where she is Chair of the Board of Trustees and Chair of the Executive Committee, Board Development Committee and Compensation Committee; High Museum of Art in Atlanta; Woodruff Arts Center; The Westminster Schools; and Meals on Wheels, Atlanta, where she chairs the Development Committee. Ms. Sams received a J.D. from the University of Virginia School of Law, and a B.A. from Princeton University, where she graduated magna cum laude.