CoStar Group filings document the regulatory record of a Delaware operating company that provides online real estate marketplaces, information, analytics, and 3D digital twin technology. Its 8-K reports commonly furnish quarterly and annual operating results, Regulation FD disclosures, investor presentation channels, and material corporate events tied to its property-market data and marketplace business.
Proxy and governance filings cover annual meeting matters, board composition, executive compensation arrangements, severance plans, and related employment agreements. Recent filings also document completed acquisition activity, capital actions, and formal disclosures connected to CoStar Group’s corporate structure and public-company governance.
CoStar Group, Inc. (CSGP) reported third-quarter 2026 revenue of $952 million, compared with $834 million a year earlier. Net income was $74 million, versus a net loss of $31 million; diluted earnings per share were $0.18, compared with a loss of $0.07. Revenue for the nine months ended September 30, 2026 was $2.774 billion, and net income was $132 million, compared with revenue of $2.347 billion and a net loss of $40 million a year earlier.
Third-quarter Commercial Real Estate revenue was $492 million and Residential Real Estate revenue was $460 million. CoStar completed its Zonda acquisition in August 2026 for total purchase consideration of $815 million, comprising $558 million in cash, settlement of $172 million in existing debt, and $85 million in existing preferred equity; the purchase-price allocation is preliminary. Cash and cash equivalents were $500 million at September 30, 2026. For the first nine months, operating activities provided $455 million, while investing and financing activities used $981 million and $706 million, respectively.
CoStar Group agreed to acquire Vexcel for $730 million in cash, subject to customary working capital and other post-closing adjustments. The transaction is expected to close in the first quarter of 2027, subject to customary closing conditions and regulatory approvals, and is expected to be accretive to Adjusted EPS in the first full year of ownership. CoStar expects to fund the acquisition with cash on hand and its existing revolving credit facility. Vexcel reported more than $140 million of revenue in the last twelve months, up over 30% from the previous twelve months, with an approximately 20% Adjusted EBITDA margin.
For the third quarter of 2026, revenue was $952 million, up 14% from $834 million a year earlier; net income was $74 million, compared with a $31 million loss. Adjusted EBITDA was $229 million, doubling from $114 million, and Adjusted EPS was $0.38, up 65%.
CoStar raised full-year 2026 guidance to $820 million-$840 million in Adjusted EBITDA, $3.75 billion-$3.77 billion in revenue, and $1.38-$1.41 in Adjusted EPS.
CoStar Group, Inc. Chief Financial Officer Robin Jack Rossmann reported that 756 shares were delivered or withheld for payment of exercise price or tax liability on October 15, 2026. The reported price was 32.0000 per share; his direct holdings following the transaction were 85,935 shares.
CoStar Group, Inc. (CSGP) announced completion of its acquisition of Bora, Inc. and its subsidiaries (together, Zonda) for $800 million in cash, adding a leading new home construction data, software and marketplaces platform to its portfolio. Zonda generated about $170 million of revenue in 2025 with a 23% Adjusted EBITDA margin, contributing a scaled, profitable and largely subscription-based business. The deal expands CoStar’s presence in the U.S. new home market, which the company cites at about $400 billion in annual home sales, and brings the NewHomeSource.com and Livabl marketplaces into CoStar’s network.
Management states the acquisition is expected to enhance profitability in the residential segment and support CoStar’s consolidated margin profile while creating long-term growth opportunities across commercial, residential, multifamily, lending and analytics businesses. For the second quarter of 2026, CoStar reported $925 million in revenue, up 18% year-over-year, with Adjusted EBITDA of $184 million, more than double the prior year. Residential revenue was $444 million, up 33%, and the residential segment produced positive Adjusted EBITDA, providing a profitability backdrop as Zonda is integrated.
Baron Capital Group, Inc., BAMCO, Inc., Baron Capital Management, Inc. and Ronald Baron report a significant ownership stake in CoStar Group, Inc. They collectively report beneficial ownership of 21,626,763 shares of CoStar common stock, representing 5.3% of the outstanding class as of June 30, 2026.
All reported shares are held with shared rather than sole power. The group reports 21,369,752 shares with shared voting power and 21,626,763 shares with shared dispositive power, with no sole voting or dispositive power. BAMCO and Baron Capital Management are subsidiaries of Baron Capital Group, and Ronald Baron owns a controlling interest in Baron Capital Group.
The advisory clients of BAMCO and Baron Capital Management have the right to receive dividends or sale proceeds for the CoStar shares held in their accounts, and to the filers’ knowledge, no single client has an interest in more than 5% of the class.
COSTAR GROUP, INC. Chief Accounting Officer Cynthia Cammett Cann reported a sale of 4,788 shares of common stock on 2026-08-07 in an open market or private transaction at $30.78 per share. Following this transaction, she holds 18,822 shares of CoStar Group common stock directly.
CoStar Group, Inc. director John W. Hill reported a sale of 3,500 shares of common stock on 2026-08-05 at $30.21 per share in an open market or private transaction. Following this sale, Hill directly holds 22,993 shares of CoStar Group common stock.
CoStar Group (CSGP) has a notice of proposed sale covering up to 3,500 shares of common stock, with an aggregate market value of $106,067.50, to be sold through Ameritas Investment Corp on or after August 5, 2026 on NASDAQ.
The shares relate to stock issued as payment for services rendered on several dates, including 989 shares on November 1, 2025, 25 shares on September 15, 2025, 922 shares on August 1, 2025, 617 shares on September 15, 2024, and 947 shares on September 14, 2015, all classified as compensation common stock.
CoStar Group, Inc. founder and CEO Andrew C. Florance reported purchasing 83,300 shares of common stock on August 4, 2026 at an average price of $29.89 per share, based on prices ranging from $29.57 to $29.99. After this open-market purchase, he directly holds 1,806,165.03 shares.
Rossmann Robin Jack reported acquisition or exercise transactions in this Form 4 filing.
CoStar Group, Inc. granted Chief Financial Officer Robin Jack Rossmann 34,771 restricted stock units on July 31, 2026. Each unit represents a contingent right to receive one share of common stock. The award vests in three equal installments on August 1, 2027, 2028 and 2029, and Rossmann now directly holds 34,771 RSUs.