CoStar Group is trading 12.5% down at $26.55 in after-hours trading. The company reported second-quarter 2026 adjusted EPS of $0.32, exceeding analyst estimates, but revenue of $925 million missed consensus forecasts. - Revenue grew 18% year-over-year, and adjusted EBITDA more than doubled to $184 million, with the residential segment turning profitable for the first time. - The sharp decline reflects investor concern over the revenue miss and broader skepticism regarding the company's growth trajectory and residential investments, further influenced by recent CFO departure and prior un-reiterated guidance.