CoStar Group, Inc. (CSGP) Stock Price & How to Invest

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, and in Q2 2026 revenue rose to about $925 million with net income of about $55 million and adjusted EPS of $0.32 against a $0.29 consensus. Trailing twelve-month revenue reached about $3.56 billion, growing about 18% in the latest quarter, while net income over that span was only about $74 million, a net margin near 2%. The stock therefore trades less on current earnings than on whether CoStar can turn its data dominance and residential investment into durable, expanding margins. Sentiment turned hard against it in 2026: the shares fell from a 52-week high near $79 to a low near $26, closing at about $31.80 on October 16, 2026, down about 52% year to date. Commentary in October pointed to pressure on Apartments.com to show it is stabilizing after weaker performance, alongside higher rates and uncertainty about how AI changes information businesses, and Deutsche Bank trimmed its price target to $35 from $37 on October 9. The stock has bounced about 9% over the past month.

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 (about 177x in October 2026, against about 18x forward), which leaves it sensitive to any slowdown in growth or delay in the margin inflection. Apartments.com has shown weakness that the company now needs to reverse, and analysts including Deutsche Bank have cut 2027 estimates and targets for information-services stocks on a higher cost of capital. 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.

20 analysts publish price targets on CSGP, averaging $37.40 against a $32.31 price as of October 2026, or +15.8%. The published targets run from $25.00 to $53.00, a wide spread, and the ratings split 12 buy, 8 hold, 1 sell. Over the last six months there has been 1 raise and 10 cuts among the published actions. A price target is what an analyst published on a date, not a prediction, and sell-side ratings skew positive across the whole market.

Read the full CSGP forecast and price target for the target table, the recent rating actions by firm, and how the consensus has shifted.

We give no verdict on CoStar Group, Inc.. Both cases are real, which is why the question is contested at all, so here is the strongest version of each.

The case for buying. 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. The most optimistic published target, $53.00, assumes this works close to its best case.

The case against. 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 most pessimistic target, $25.00, is roughly what CSGP is worth if this bites instead.

Read the full bull and bear case on CSGP, including what would have to change to break either one. Walnut is not an investment adviser.

Yes. CoStar Group, Inc. (CSGP) has had one share split in the last 10 years:

• 10:1 on June 28, 2021, so every share held became 10 shares.

A split changes the share count and the price per share and leaves the value of a holding unchanged. Someone holding $1,000 of CSGP the day before the 10:1 split held $1,000 the day after, in more shares at a proportionally lower price. Historical prices from before the date are normally shown split-adjusted, which is why a long-run chart shows no cliff.

Splits matter mainly because they make older price figures confusing to compare by hand, and because a board choosing to split is usually signalling that the price has run up far enough to feel awkward for smaller buyers. Neither is a reason to buy or sell.

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): ~$3.56 billion
• Revenue growth (Q2 2026, YoY): ~18%
• Q2 2026 results: ~$925 million revenue; adjusted EPS $0.32 vs $0.29 consensus
• Margins (TTM gross / operating / net): ~79% / ~8% / ~2%
• P/E (trailing / forward): ~177x / ~18x
• Market cap: ~$12.9 billion at ~$31.80 (October 16, 2026)
• Balance sheet: ~$1.27 billion cash vs ~$1.16 billion debt
• Next earnings: October 27, 2026; consensus EPS ~$0.34 on ~$959 million revenue

CoStar's trailing P/E near 177x is a by-product of tiny net income (about $74 million over twelve months), so the forward multiple near 18x is the more useful gauge, and it has compressed sharply as the share price halved in 2026. Analysts compiled by Yahoo Finance expect about $1.36 of EPS in 2026 on revenue near $3.79 billion, rising to about $1.77 in 2027. The valuation now prices meaningful doubt about Apartments.com and Homes.com, with an average target of about $37 across 20 analysts.

If you want CSGP exposure as part of a larger bundle rather than directly, these ETFs hold it meaningfully. Weights are approximate and refresh quarterly.

Other names that sit close to CSGP: same theme, named as a direct competitor, or held beside it in the same funds. Each entry says which. Worth a look if you are thinking about diversification within a thesis rather than concentration on one ticker.

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 (AKRE), which spreads the position across many companies. Or build it into a focused thematic portfolio, so CSGP sits alongside other stocks that express the same thesis.

Walnut takes the portfolio 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.

New to this? Start with how to invest in stocks, see how to analyze a stock with AI, or compare the best AI stock analyzers.

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. After a roughly 57% fall over the past year, the market is now discounting both the residential spend and doubts about the multifamily engine, which makes the October 27, 2026 report a direct read on whether the commercial base is still compounding.

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 or a sell?, 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? And to weigh CSGP against a peer, read the full side-by-side comparisons: CSGP vs Z and CSGP vs MCO.