CoStar Group, Inc. (CSGP) Stock Price & How to Invest
Last updated July 2026
Short answer
You can invest in CoStar Group (CSGP) by buying shares or fractional shares at any major broker, through a real-estate or technology ETF that holds it, or as one holding in a thematic basket. CoStar is the dominant commercial-real-estate data and marketplace franchise (CoStar, LoopNet, Apartments.com) now spending heavily to build Homes.com into a residential portal against Zillow. That growth push depresses reported profits today, so the stock trades on the bet that its data moat and residential ambitions eventually convert to margin.
CSGP stock price
As of 2026-07-16, CoStar Group, Inc. (CSGP) last closed at $30.37, down 64.2% over the past year. Over the past 52 weeks it has traded between $27.68 and $96.83.
Prices are daily closing prices from Yahoo Finance and may be delayed. For the live quote, check your broker or CoStar Group, Inc.'s investor relations page. Walnut is informational, not investment advice.
What does CoStar Group, Inc. (CSGP) do?
CoStar Group is a real-estate information, analytics, and online-marketplace company. Its core commercial franchise sells subscriptions to the CoStar database (property records, leasing, sales comparables, and analytics compiled by hundreds of researchers), LoopNet (the most-visited commercial listing marketplace), and Apartments.com (the leading multifamily rental marketplace). More recently the company has pushed into residential real estate with Homes.com, spending aggressively on marketing to challenge Zillow and Realtor.com. Revenue is largely recurring and subscription-based, which historically produced high margins and consistent growth across dozens of quarters.
The investment picture is a tension between a proven, high-margin commercial engine and a costly residential expansion. Commercial CRE, multifamily, and information services throw off strong cash and pricing power, but the Homes.com build-out has weighed on profitability, pulling net income down sharply even as revenue keeps growing at double digits. In Q1 2026 the company returned to profit and raised full-year profit guidance, a sign that operating leverage may be inflecting after the heaviest residential spending. The stock therefore trades less on current earnings than on whether CoStar can turn its data dominance and residential investment into durable, expanding margins.
What's driving CoStar Group, Inc. (CSGP)?
1. Commercial data moat and pricing power.
The core CoStar and LoopNet franchises hold a dominant position in commercial-real-estate data, built on hundreds of researchers continuously gathering property, leasing, and sales information that is expensive to replicate. Customers embed CoStar into their workflows, creating high switching costs and steady subscription renewals. This gives the company consistent pricing power and a recurring, high-margin revenue base.
2. Residential expansion with Homes.com.
CoStar is investing heavily to make Homes.com a leading residential portal, competing with Zillow and Realtor.com. If it wins meaningful audience and agent-membership revenue, residential could become a large second growth engine layered on top of commercial. The size of the residential advertising market is the main reason the company is spending so aggressively now.
3. Margin inflection and operating leverage.
Years of heavy residential marketing suppressed profits, but management points to adjusted EBITDA doubling year over year in early 2026 and raised full-year profit guidance. As Homes.com spending stabilizes against a growing revenue base, incremental revenue can fall through to margin, which is the central operating-leverage thesis analysts watch.
4. Acquisitions and adjacent expansion.
CoStar has a long record of buying and integrating adjacent platforms (LoopNet, Apartments.com, and international and analytics assets) to widen its data and marketplace footprint. Continued tuck-in and larger deals can extend the franchise into new property types and geographies, though each acquisition also carries integration and capital-allocation risk.
What are the risks to CoStar Group, Inc. (CSGP)?
Reported profitability has been thin because of heavy Homes.com marketing, so the residential bet remains unproven and could keep depressing margins if audience and agent revenue disappoint. The stock trades at a very high trailing earnings multiple, which leaves it sensitive to any slowdown in growth or delay in the margin inflection. Commercial-real-estate activity is cyclical and can soften subscription growth when transaction volumes and leasing weaken. Residential competition against entrenched incumbents like Zillow is intense and expensive. Large acquisitions add integration and capital-allocation risk, and a premium valuation magnifies the downside if execution slips.
How is CoStar Group, Inc. (CSGP) valued? (approximate, July 2026)
A simple financial snapshot. These are approximations and refresh quarterly; for current figures see CoStar Group, Inc.'s investor relations page or your broker.
- Revenue (TTM): ~$3.5 billion
- 2026 revenue guidance: ~$3.78-3.82 billion (16-18% growth)
- Q1 2026 revenue: ~$897 million, up ~23% year over year
- Adjusted EPS guidance (2026): ~$1.32-1.39
- Market cap: ~$12-13 billion
- Forward P/E: ~20x (trailing P/E far higher on depressed net income)
CoStar carries a very high trailing P/E because heavy residential spending has kept net income small relative to its size, so the forward multiple is a more useful gauge. Revenue keeps compounding at double digits and 2026 profit guidance was raised, pointing to a possible margin inflection. The valuation reflects the market pricing in a successful Homes.com build-out rather than current earnings.
Who competes with CoStar Group, Inc. (CSGP)?
Residential real-estate portals
Zillow Group and Realtor.com are the entrenched residential-listing and advertising platforms CoStar is challenging with Homes.com, competing for consumer audience and agent membership dollars.
Commercial and multifamily marketplaces and data
In commercial and rental listings CoStar competes with players like Reonomy, Moody's CRE (formerly REIS), and rental sites such as Zillow-owned and RentGroup properties, though CoStar's LoopNet and Apartments.com hold leading positions.
Financial and real-estate information providers
Broader information and analytics rivals, including Moody's Analytics, MSCI real-assets data, and various proptech data startups, compete for the research, valuation, and analytics budgets of real-estate professionals.
How to invest in CoStar Group, Inc. (CSGP)
There are three common ways to get CSGP exposure. Buy shares (or fractional shares) directly at any major broker. Hold an ETF that includes it, which spreads the position across many companies. Or build it into a focused thematic basket, so CSGP sits alongside other stocks that express the same thesis.
Walnut takes the basket route. Describe a thesis where CSGP fits (for example “AI infrastructure” or “dividend-growth large-caps”) and the AI proposes 5 to 6 constituents with target weights. You review the plan and fund it through your own broker when you're ready.
The bottom line on CoStar Group, Inc. (CSGP)
CoStar Group (CSGP) pairs a wide-moat, subscription-driven commercial-real-estate data business with an expensive, still-unproven residential land grab, so in a portfolio it behaves as a high-quality franchise carrying near-term margin drag and a valuation that rides on the Homes.com bet paying off.
More on CoStar Group, Inc. (CSGP)
Whether CSGP is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, what would have to go right, and the risks in is CSGP a buy?, and where the stock could go from here in the CSGP stock forecast.
For income investors, whether CSGP pays a dividend and how the payout looks is covered in does CSGP pay a dividend?
Build a basket around CSGP with Walnut
Use CoStar Group, Inc. as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
What does CoStar Group do?
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CoStar Group provides real-estate data, analytics, and online marketplaces. Its commercial business (CoStar and LoopNet) sells property data and listings to professionals, Apartments.com leads multifamily rentals, and Homes.com is its residential portal competing with Zillow.
How can I invest in CSGP?
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CSGP trades on the Nasdaq, so you can buy shares or fractional shares through any major broker. It is also held inside various real-estate and technology ETFs, and can sit as one holding in a diversified thematic basket.
Why is CoStar's P/E ratio so high?
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The trailing P/E looks extreme because heavy Homes.com marketing has kept net income very low relative to the company's size. The forward P/E (around 20x) is a more useful measure since it reflects expected earnings as residential spending normalizes.
Does CoStar Group pay a dividend?
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CoStar has historically prioritized reinvestment and acquisitions over paying a dividend, so it is generally viewed as a growth-oriented name rather than an income stock. Investors focused on yield typically look elsewhere.
Who are CoStar's main competitors?
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In residential, CoStar's Homes.com competes with Zillow and Realtor.com. In commercial and rental data and marketplaces it competes with firms like Reonomy, Moody's CRE data, and other proptech and information providers, though it leads in commercial data.
What is the biggest risk with CSGP stock?
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The main risk is that the costly Homes.com residential push fails to generate enough revenue to justify the spending, keeping margins depressed. Combined with a premium valuation and cyclical commercial-real-estate demand, that leaves the stock exposed to disappointment.
Is CoStar profitable?
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CoStar generates strong revenue and returned to net profit in early 2026, with adjusted EBITDA roughly doubling year over year. Reported profits had been thin because of residential marketing spend, but management raised full-year profit guidance.
Is CoStar Group a growth or value stock?
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CoStar is generally treated as a growth stock: revenue compounds at double digits and it reinvests heavily rather than paying a dividend. Its high valuation and reliance on the Homes.com opportunity make it a growth-oriented holding, not a value play.
Walnut is informational, not investment advice. Financial figures on this page are approximations; always verify current numbers with CoStar Group, Inc.'s investor relations page or your broker before making investment decisions.