Plotted by close date where disclosed, otherwise announcement. Select any marker to jump to the deal entry.
Three patterns show up across CoStar's deal book — what the team buys, how it pays, and how it integrates. The patterns are the throughline; the deals below are the evidence.
9 acquisitions. Each entry carries the deal value, financing structure, target revenue, executive commentary, and the original SEC filing — the evidence behind the patterns above.
LoopNet operated the leading online commercial real estate marketplace, with 5.8 million registered members and approximately 3.6 million unique monthly visitors at the time of closing. CoStar acquired LoopNet through a merger of Lonestar Acquisition Sub into LoopNet, and planned to continue operating LoopNet as a separate brand. $16.50 in cash plus 0.03702 shares of CoStar common stock per LoopNet share.
We believe our products and services, diversified client base, comprehensive geographic footprint and economies of scale will drive significant synergies, which we believe can lead to increased stockholder value and a stronger, integrated platform for our customers.Andrew C. Florance — Founder and Chief Executive Officer, CoStar Group
CoStar purchased the Apartments.com business, including certain assets and assumed liabilities, from Classified Ventures, LLC under an Asset Purchase Agreement. The deal gave CoStar a leading multifamily rental listings marketplace, funded in part through a new $400 million term loan and $225 million revolving credit facility. $585 million in cash ($587 million paid at closing after a net working capital adjustment).
ForRent, a division of Dominion Enterprises, provided digital advertising through a network of four multifamily websites including ForRent.com, AFTER55.com, CorporateHousing.com and ForRentUniversity.com. ForRent had approximately 17,000 properties advertised, generated over 47 million visits in the first half of 2017, and was headquartered in Norfolk, Virginia with about 475 employees. CoStar added ForRent to the Apartments.com network. $350 million in cash and $35 million in CoStar Group stock.
We are delighted to welcome the ForRent team and their family of sites to the Apartments.com network. We believe this is a beneficial combination for all of our constituents.Andrew C. Florance — Founder and Chief Executive Officer, CoStar Group
Through subsidiaries CoStar Realty Information and CoStar Portfolio Strategy, CoStar agreed to acquire all outstanding equity of STR, Inc. (a Tennessee corporation) and STR Global, Ltd. (registered in England and Wales) from the Smith family sellers under a Securities Purchase Agreement. STR is a leading provider of hotel and hospitality benchmarking data and analytics. A separate agreement covered the minority shareholder of STR Global. $450 million in cash (aggregate purchase price, subject to adjustments).
CoStar subsidiary CSGP Holdings agreed to acquire the reorganized RentPath, a provider of digital media services to residential real estate clients, for $587.5 million in cash through RentPath's Chapter 11 plan of reorganization in the U.S. Bankruptcy Court for the District of Delaware. The transaction was subsequently terminated after the Federal Trade Commission opposed the acquisition, and the deal never closed. $587.5 million in cash (agreement later terminated; deal never closed).
CoStar Realty Information acquired Ten-X, an online commercial real estate auction and transaction platform, through the merger of Crescendo Sub into Ten-X, with Ten-X surviving as a wholly owned subsidiary. The equityholders of Ten-X, including funds managed by Thomas H. Lee Partners, received an aggregate $190 million in cash. $190 million in cash (aggregate purchase price, subject to adjustments).
Matterport, founded in 2011, pioneered 3D capture technology that creates dimensionally accurate photorealistic virtual tours, or digital twins, of any property. Its patented technology, flagship LiDAR-based Pro3 camera, and Cortex AI engine power the world's largest spatial data library with over 14 million spaces and 50 billion square feet digitized across 177 countries. CoStar acquired Matterport in a cash-and-stock transaction to accelerate AI-driven digital twin technology across its product lines. $5.50 per share ($2.75 cash plus $2.75 in CoStar stock), an estimated $1.6 billion of enterprise value.
By integrating Matterport's groundbreaking digital twin technology with our vast property data and online marketplaces, we are creating an unparalleled solution for buyers, sellers, and renters to explore properties with greater depth and insight than ever before.Andy Florance — Founder and Chief Executive Officer, CoStar Group
CoStar entered a binding Scheme Implementation Deed to acquire 100% of Domain Holdings Australia, a leading Australian property marketplace. In February 2025 CoStar had acquired roughly 17% of Domain's shares at A$4.20 per share for about A$452 million. Under the scheme, CoStar agreed to pay A$4.43 per share for the balance, valuing Domain at an implied enterprise value of about A$3.0 billion. The Domain board unanimously recommended shareholders vote in favor, subject to shareholder, court, and Australian Foreign Investment Review Board approvals. A$4.43 per share, implying an enterprise value of about A$3.0 billion; roughly A$2.3 billion (about $1.5 billion) for the remaining shares, after an earlier A$452 million (about $285 million) stake for approximately 17%.
Zonda is a leading provider of new home construction data, homebuilder software, and residential real estate marketplaces, serving more than 3,000 customers across the homebuilding ecosystem. Its platform spans land acquisition, development planning, homebuilding analytics, construction forecasting, and community marketing, built on a proprietary lot-level database. Zonda also operates the NewHomeSource and Livabl new-home marketplaces in the U.S. and Canada. Its largely subscription revenue carries about 104% net customer retention. $800 million in cash.