On July 29, CoStar fell 6.69% in after-hours trading, trading at $27.35/share, with turnover of $7.09 million. The decline was triggered by the company's Q2 earnings release, in which revenue narrowly missed consensus expectations.

CoStar reported Q2 adjusted EPS of $0.32, beating the analyst consensus estimate of $0.29 by 10.34%, representing an 88.24% year-over-year increase. However, revenue came in at $925 million, falling short of the $928.75 million estimate. Net income surged 817% year-over-year and adjusted EBITDA more than doubled, underscoring a significant profitability inflection point with revenue growing 18% annually.

Despite the strong bottom-line performance, the slight revenue miss coincided with an already elevated stock price — shares had rallied over 10% across the two prior trading sessions as optimistic pre-earnings expectations were priced in. The combination of a minor top-line shortfall and fully digested bullish sentiment prompted after-hours profit-taking. Jefferies maintains a Buy rating with a $45 price target, while RBC holds a Sector Perform rating at $34.

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