🔴 CoStar Group is trading 14.94% down today in after-hours trading — after-hours catalyst remains unconfirmed

CoStar Group is trading at $27.06, down 14.94%, with no verified company-specific announcement explaining the sharp after-hours decline.

• The regular session closed at $31.81, down 1.55%, on lighter-than-average volume, according to reported market coverage.
• CoStar Group’s investor-news page lists its next quarterly results for October 27, 2026.
• Major indices were positive, so broad-market sentiment does not clearly explain the move.