What is CSGP's market cap?

$12.89B, based on the Nov 5 close of $32.05.

What is CSGP's P/E ratio?

72.2× trailing-twelve-month earnings of $178.50M.

Does CoStar Group pay a dividend?

No regular cash dividend has been paid in the last year.

How much of CSGP is sold short?

15.0M shares, 3.8% of float, as of Oct 15, 2026.

What sector is CSGP in?

Industrials, in the Business Services industry.

NASDAQ · CSGPIndustrialsBusiness Services

CoStar Group Inc (CSGP)

$32.05−1.63%

Close Nov 5, 2026 · split-adjusted

Nov 5, 2026$32.05▼ 54.50% in range

Nov 5, 2025Low $26.95 · High $70.44Nov 5, 2026

What changed · written from our data

As of Nov 5, 2026

CoStar Group closed at $32.05 on Nov 5, down 1.63%, 54.5% below its 52-week closing high. Volume of 6.6M shares was 1.00× its 20-day average (close to normal).

Split-adjusted performance: +16.1% over one month, -8.4% over six months, -54.1% over one year.

In the quarter ended Sep 30, 2026, revenue was $952M, up 14.1% from a year earlier, with a net margin of 7.8%.

Short interest was 15.0M shares at the Oct 15 settlement, up 12.8% from the prior report (3.8% of float, 2.9 days to cover).

Market cap$12.89B402.3M shares

Revenue · quarter$952.0M+14.1% YoY

Diluted EPS$0.18—

P/E · TTM72.2×P/S 3.5×

Net margin7.8%Gross 77.8%

Dividend yieldNone

52-week range26.95 – 70.44−54.5% from high

Volume6.6M1.00× 20-day avg

Volatility · 60d59.0%Annualised

Short % of float3.8%2.9 days to cover

Net cash-$494.0MCash $500.0M

Next earnings—Not scheduled

Split-adjusted performance

1W +13.9%1M +16.1%3M +6.0%6M −8.4%YTD −52.3%1Y −54.1%3Y −56.3%5Y −63.4%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Business Services

Percentile among 75 companies (100 = best)

6-month momentum38

Revenue growth65

Net margin61

Value (low P/E)14

Size77

Industry medians: 6-month return +11.5%, revenue growth +9.4%, net margin 5.6%, P/E 25.8×.

Short interest

Details →

Shares short15.0M+12.8% vs prior

Days to cover2.9Settled Oct 15

% of float3.8%

Short vol. 10d31.5%of daily volume

Closest peers by size in Business Services

Company	Price	Today	6M	Rev. growth	Net margin	P/E	Mkt cap
CSGPCoStar Group	$32.05	−1.63%	−8.4%	+14.1%	7.8%	72.2	$12.89B
CARTMaplebear	$57.79	−2.41%	+52.1%	+14.1%	10.5%	29.0	$13.67B	Compare
AKAMAkamai Technologies	$77.84	−9.41%	−33.3%	+5.4%	7.2%	27.2	$11.19B	Compare
FISFidelity National Information Services	$29.39	−1.24%	−37.8%	+29.1%	6.8%	4.5	$15.16B	Compare
FICOFair Isaac	$707.40	+0.91%	−37.3%	+25.7%	35.2%	18.7	$15.28B	Compare
RBARB Global	$94.78	−0.33%	−8.4%	+11.1%	10.0%	40.2	$17.55B	Compare
HQYHealthEquity	$103.46	−4.94%	+23.2%	+7.6%	18.7%	36.2	$8.56B	Compare
ETSYEtsy	$91.53	−4.89%	+43.0%	+10.9%	123.3%	8.0	$7.89B	Compare
BRBroadridge Financial Solutions	$193.92	+2.45%	+26.8%	+5.0%	5.7%	20.8	$21.93B	Compare

News about CoStar Group

All news →

Here's Why CoStar Group (CSGP) is a Strong Growth StockZacks Investment Research · 3d ago▲ Positive CoStar Group Q3 Earnings Beat Estimates, Revenues Increase Y/YZacks Investment Research · Oct 28, 2026▲ Positive CoStar Group (CSGP) Q3 Earnings and Revenues Beat EstimatesZacks Investment Research · Oct 27, 2026▲ Positive CoStar Group to Report Q3 Earnings: What's in Store for the Stock?Zacks Investment Research · Oct 23, 2026Neutral

Quick answers

What does CoStar Group do?: CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage.
What is CSGP's market cap?: $12.89B, based on the Nov 5 close of $32.05.
What is CSGP's P/E ratio?: 72.2× trailing-twelve-month earnings of $178.50M.
Does CoStar Group pay a dividend?: No regular cash dividend has been paid in the last year.
How much of CSGP is sold short?: 15.0M shares, 3.8% of float, as of Oct 15, 2026.
What sector is CSGP in?: Industrials, in the Business Services industry.

About CoStar Group

CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage. It primarily sells high-margin software-as-a-service subscriptions that provide institutional clients with forensic property data and premium advertising visibility. With operations across North America, Europe, and Asia-Pacific, CoStar maintains the industry's most comprehensive centralized real estate database, functioning as a critical information utility for brokers, lenders, and owners worldwide.

HQ: Arlington, VA8,000 employeesListed Jul 1, 1998costargroup.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology