Why CoStar (CSGP) shares are falling today
CoStar Group (CSGP) shares fell 13.3% after reporting Q3 2026 revenue of $952M, net income of $74M, and adjusted EBITDA of $229M. The company acquired Vexcel for $730M but reported net new bookings below expectations. Full-year guidance was raised, with adjusted EBITDA now expected between $820M-$840M. The stock is down 58.4% YTD.
How this was made

The 30-second read
Why it matters
The earnings beat and guidance lift are positive, but the immediate share decline reflects market concerns over bookings shortfall and acquisition cost.
Market read
The article delivers fresh earnings and M&A data that moved CoStar's stock 13% lower, offering a potential entry point for traders.
What to watch
Cost‑saving initiatives of $150M‑$200M could improve margins, and the Vexcel acquisition may expand data capabilities.
Background
CoStar Group is a leading provider of commercial real‑estate data; its performance is tied to CRE market activity.
Ticker impact
CoStar Group reported Q3 2026 results, raised full-year guidance, and announced a $730M acquisition, causing a 13.3% share drop.
likely continued pressure as investors reassess guidance and acquisition cost
The stock already dropped 13.3% on the same day; despite higher guidance, the market perceives the acquisition and short‑term bookings miss as a negative catalyst.
Market effects
Real‑estate data providers may see heightened scrutiny on acquisition financing and booking trends.
U.S. tech and data‑service stocks could experience short‑term pullback amid broader market volatility.
Limited to investors tracking commercial‑real‑estate data niche; no broad macro impact.
Counterpoint
Guidance raise and record profitability suggest long‑term upside; the dip may be an over‑reaction.
Key entities
- companyCoStar Group
Real‑estate data provider reporting Q3 2026 results.
- companyVexcel
Target of CoStar's $730M acquisition.


