CoStar Group, Inc. (CSGP)
How CSGP actually reacts to news — the realized, point-in-time move the market made, measured across 451 labeled events over the last three years with zero look-ahead.
CSGP’s median reaction, across the day.
Email me when CSGP moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to CSGP’s baseline. Nothing else.
Get “How CSGP reacts to news” as a PDF.
A free one-page summary: CSGP’s median reaction to news and the full breakdown by event type — the numbers on this page, in one page.
Recent CSGP events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Apartments.com and CoStar Release a Multifamily Vacancy Update for Q2 2026 | Press release | Business Wire | -0.74% | -1.04% | |
| CoStar Data Shows Strong Prelet Activity Driving UK Lab Space Demand to a Record High | Press release | Business Wire | -0.74% | -1.04% | |
| CoStar Expects U.S. Industrial Demand to Outpace Supply by Late 2027 | Press release | Business Wire | -1.90% | -1.24% | |
| CoStar Data Shows London Dominates UK Office Development as Regional Pipeline Hits 20-Year Low | Press release | Business Wire | -0.79% | -0.90% | |
| Apartments.com Releases Multifamily Rent Growth Report for July 2026 | Press release | Business Wire | +1.15% | +4.39% | |
| Form 10-Q COSTAR GROUP, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +1.15% | +4.39% | |
| Form S-8 COSTAR GROUP, INC. | SEC filing · Form S-8 | SEC EDGAR | +1.15% | +4.39% | |
| CoStar Group Q2 2026 Results Mark a Profitability Inflection with Revenue Up 18%, Net Income Increasing 817%, and Adjusted EBITDA More Than Doubling Year-over-Year | Press release | Business Wire | +6.64% | +14.91% | |
| Form 8-K COSTAR GROUP, INC. For: Jul 28 | SEC filing · Form 8-K | SEC EDGAR | +6.64% | +14.91% | |
| Homes.com Shares Most Expensive Home Sales Across Major U.S. Markets in June | Press release | Business Wire | -1.15% | -3.92% | |
| U.S. Retail Asking Rent Growth Slowed in the Second Quarter of 2026 | Press release | Business Wire | +1.04% | -2.81% | |
| CoStar Data Shows Amazon, Defence and Chinese Firms Drive UK Warehouse Demand Recovery | Press release | Business Wire | +0.03% | +4.47% | |
| Homes.com Report: U.S. Home Prices Edge Higher in June as Supply and Demand Trends Remain in Balance | Press release | Business Wire | +2.18% | +1.90% | |
| U.S. Retail Construction Activity Holding Near Post-Pandemic Lows | Press release | Business Wire | +0.78% | +2.52% | |
| CoStar Group Promotes Robin Rossmann to Chief Financial Officer to Drive Margin Expansion and Profitable Growth | Press release | Business Wire | +0.78% | +2.52% | |
| Form 8-K COSTAR GROUP, INC. For: Jul 07 | SEC filing · Form 8-K | SEC EDGAR | +0.78% | +2.52% | |
| U.S. Office Leasing Remained Steady in the Second Quarter of 2026 | Press release | Business Wire | -0.27% | -4.31% | |
| CoStar Group Announces Launch of CoStar Platform in France | Press release | Business Wire | +0.30% | +1.83% | |
| CoStar Group Invests in Wikicasa, Italy’s Agent-Backed Real Estate Marketplace | Press release | Business Wire | +1.57% | +0.96% | |
| CoStar Group to Report Financial Results for Second Quarter on July 28, 2026 | Press release | Business Wire | +0.30% | +1.83% | |
| CoStar Group Stockholders Overwhelmingly Reelect Director Nominees and Support Say-on-Pay at Annual Meeting of Stockholders | Press release | Business Wire | -0.29% | -2.32% | |
| Form 8-K COSTAR GROUP, INC. For: Jun 23 | SEC filing · Form 8-K | SEC EDGAR | -0.29% | -2.32% | |
| Apartments.com Releases Multifamily Rent Growth Report for June 2026 | Press release | Business Wire | -0.29% | -2.32% | |
| Austin, San Jose Lead Apartments.com and CoStar’s U.S. Multifamily Momentum Index | Press release | Business Wire | +1.56% | -2.70% | |
| CoStar Group Launches Apartments.com Ai, Redefining the Future of Apartment Search | Press release | Business Wire | -0.15% | -1.14% | |
| Homes.com Report: U.S. Median Home Price Increases to $395,000 in May as Sales Hold up Despite Higher Mortgage Rates | Press release | Business Wire | -1.20% | -4.21% | |
| Homes.com Shares Most Expensive Home Sales Across Major U.S. Markets in May | Press release | Business Wire | -1.20% | -4.21% | |
| U.S. Industrial Vacancy Rates Across Newer, Larger Properties Begins to Compress | Press release | Business Wire | +0.16% | -0.13% | |
| CoStar Data Shows Birmingham Posted Highest Retail Investment Volumes Since 2016 | Press release | Business Wire | -2.53% | +0.09% | |
| CoStar Group to Acquire Zonda, the Leader in New Home Data, Analytics, and Online Marketplaces | Press release | Business Wire | -1.23% | -1.38% | |
| Form 8-K COSTAR GROUP, INC. For: May 28 | SEC filing · Form 8-K | SEC EDGAR | -1.23% | -1.38% | |
| MidOcean Partners Signs Definitive Agreement to Sell Zonda to CoStar Group | Press release | Business Wire | -1.23% | -1.38% | |
| Apartments.com Releases Multifamily Rent Growth Report for May 2026 | Press release | Business Wire | -0.28% | +0.19% | |
| CoStar Data Shows Office Yield Gap Narrowing Between London and the Big Six | Press release | Business Wire | +0.72% | +0.29% | |
| CoStar Data Shows Glasgow City Centre Office Leasing Hits 230,000 Sq. Ft. in Q1 2026 | Press release | Business Wire | -3.38% | +1.80% | |
| Form SD COSTAR GROUP, INC. | SEC filing · Form SD | SEC EDGAR | -1.04% | +0.83% | |
| Homes.com Shares Most Expensive Home Sales Across Major U.S. Markets in April | Press release | Business Wire | -1.04% | +0.83% | |
| Homes.com Report: Home Prices Rise Modestly as Inventory Expands | Press release | Business Wire | -3.38% | +1.80% | |
| CoStar Data Shows U.K. Economy Outperformed Growth Expectations in Q1 2026 | Press release | Business Wire | +0.12% | +1.81% | |
| Form DEFA14A COSTAR GROUP, INC. | SEC filing · Form DEFA14A | SEC EDGAR | +0.12% | +1.81% | |
| Apartments.com Launches RentPulse, New Quarterly Index Highlighting the Deeply Divided Rental Market | Press release | Business Wire | +0.56% | -0.38% | |
| Costar Data Shows Big Six Q1 Office Investment Volumes at Their Highest Since 2018 | Press release | Business Wire | -0.98% | -1.57% | |
| Apartments.com and CoStar Release a Multifamily Construction Activity Update for Q1 2026 | Press release | Business Wire | -0.65% | -0.48% | |
| Apartments.com and CoStar Raise U.S. Multifamily Vacancy Forecast | Press release | Business Wire | +2.00% | +3.06% | |
| CoStar Data Shows Offices Leading UK Investment in Q1 2026 | Press release | Business Wire | -0.49% | -2.52% | |
| CoStar’s U.S. Retail Forecast Remains Balanced Through 2026 | Press release | Business Wire | -0.90% | -0.79% | |
| CoStar Data Shows U.K. Hotel RevPAR on an Upward Trajectory | Press release | Business Wire | +1.51% | -0.83% | |
| CoStar Expects U.S. Industrial Vacancy to Peak in Early 2027 | Press release | Business Wire | +1.90% | +2.67% | |
| Form ARS COSTAR GROUP, INC. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +1.51% | -0.83% | |
| Form DEF 14A COSTAR GROUP, INC. For: Jun 23 | SEC filing · Form DEF | SEC EDGAR | +1.51% | -0.83% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the CSGP section they belong to.
More of the dataset.
CSGP earnings → · Analyst actions → · SEC filings →
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