Greener Push Comes Just Months after Company Published First ESG Report, Underscoring CoStar Group’s Commitment to Excellence and Transparency for ESG Practices

In honor of Earth Day, CoStar Group, Inc. (NASDAQ: CSGP) – a leading provider of online real estate marketplaces, information, and analytics in the commercial and residential property markets – has underscored the company’s commitment to a greener tomorrow by reflecting on a suite of environmental initiatives.

Key initiatives include a significant technology recycling program, which resulted in more than five tons of computer equipment being recycled in the last year alone; mass transit benefits for employees to encourage a reduction in fuel consumption; and growing the company’s Field Research fleet of electric and hybrid vehicles, which has reduced fuel consumption by 160,000 gallons per year.

“For the past several years, CoStar Group has enacted policies and initiatives aimed at pushing us toward a greener tomorrow,” said Andrew C. Florance, Founder and CEO, CoStar Group. “We understand the importance of speaking out about these initiatives and our commitment to them. As a leader in the commercial real estate industry, we must lead by example. Our goal is to encourage more companies and our clients to take action and take sustainability seriously.”

CoStar Group also made a significant push to greatly reduce the company’s physical footprint, particularly by reducing its number of physical data center locations by over 75%. Much of the company’s remaining physical footprint consists of LEED certified and/or Energy Star rated buildings that have updated base and mechanical systems to improve energy and water efficiencies.

The company is also working to make green rating sustainability data more accessible than ever before, opening it to all CoStar subscribers to help encourage environmental consciousness.

To learn more about CoStar’s commitment to positive ESG practices or to read the company’s 2022 report, visit www.investors.costargroup.com/ESG/default.aspx.

About CoStar Group, Inc.

CoStar Group, Inc. (NASDAQ: CSGP) is a leading provider of online real estate marketplaces, information and analytics. Founded in 1987, CoStar conducts expansive, ongoing research to produce and maintain the largest and most comprehensive database of commercial real estate information. Our suite of online services enables clients to analyze, interpret and gain unmatched insight on commercial property values, market conditions and current availabilities. STR provides premium data benchmarking, analytics and marketplace insights for the global hospitality industry. Ten-X provides a leading platform for conducting commercial real estate online auctions and negotiated bids. LoopNet is the most heavily trafficked commercial real estate marketplace online. Apartments.com, ApartmentFinder.com, ForRent.com, ApartmentHomeLiving.com, Westside Rentals, AFTER55.com, CorporateHousing.com, ForRentUniversity.com and Apartamentos.com form the premier online apartment resource for renters seeking great apartment homes and provide property managers and owners a proven platform for marketing their properties. Homesnap is an industry-leading online and mobile software platform that provides user-friendly applications to optimize residential real estate agent workflow and reinforce the agent-client relationship. Homes.com offers real estate professionals advertising and marketing services for residential properties. Realla is the UK’s most comprehensive commercial property digital marketplace. BureauxLocaux is one of the largest specialized property portals for buying and leasing commercial real estate in France. CoStar Group’s websites attract tens of millions of unique monthly visitors. Headquartered in Washington, DC, CoStar Group maintains offices throughout the U.S., Europe, Canada and Asia. From time to time, we plan to utilize our corporate website, www.costargroup.com, as a channel of distribution for material company information. For more information, visit CoStarGroup.com.

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