Direct Answer
CoStar Group reports revenue across 2 business segments in its fiscal 2025 Form 10-K. Commercial Real Estate is the largest, with $1.8 billion of revenue (55% of the total), followed by Residential Real Estate at $1.5 billion (45%).
How Does CoStar Group Make Money?
No single line supplies a majority of revenue: the largest, Commercial Real Estate, is 55%, which spreads CoStar Group's exposure across several demand drivers. Between fiscal 2024 and 2025, Residential Real Estate grew fastest (+19.6%) and Commercial Real Estate slowest (+18.0%), so the revenue mix tilts toward Residential Real Estate while that gap lasts.
| Segment | FY2025 revenue | FY2024 revenue | Share of revenue | Change |
|---|---|---|---|---|
| Commercial Real Estate | $1.8 billion | $1.5 billion | 55.0% | 18.0% |
| Residential Real Estate | $1.5 billion | $1.2 billion | 45.0% | 19.6% |
What the Segment Figures Do Not Show
The rows above add up to 100% of CoStar Group's reported revenue for fiscal 2025; the difference is intersegment eliminations, corporate revenue or items the company reports outside its segments. Segment definitions are management's choice and change when a company reorganizes, in which case it restates prior years in the next filing, so a multi-year comparison should use the figures from a single filing. Revenue shows where sales come from, not where profit or cash is earned: a small segment can carry most of the margin.
Where These Numbers Come From
Every figure on this page is a value CoStar Group reported in the segment note and revenue disclosures of its Form 10-K filed February 26, 2026 (accession 0001057352-26-000020), read from the SEC's Financial Statement Data Sets. The prior-year column is the comparative figure from that same filing, so it reflects any restatement for a change in segments. Category names are the company's own XBRL labels, lightly reformatted for reading.
Rows that only total other rows (for example a "Products" line beside the individual products) are left out so nothing is counted twice. This page is educational and describes reported history for fiscal 2025; it is not a forecast or a recommendation.
Frequently Asked Questions
What are CoStar Group's business segments?
In its fiscal 2025 Form 10-K, CoStar Group reports revenue for Commercial Real Estate and Residential Real Estate.
Which part of CoStar Group brings in the most revenue?
Commercial Real Estate, with $1.8 billion of revenue in fiscal 2025, or 55% of the total.
Where does CoStar Group report its segment results?
In the segment note to the financial statements in its Form 10-K, most recently filed February 26, 2026, alongside management's discussion of each segment's results.