COSTAR GROUP, INC. SEC Filings

Rossmann Robin Jack bought 34,771 shares at $0.00 on 2026-07-31

Cann Cynthia Cammett sold 1,077 shares at $28.76 on 2026-08-01; Cann Cynthia Cammett bought 26,078 shares at $0.00 on 2026-07-31

SAINT FREDERICK G. sold 1,436 shares at $28.76 on 2026-08-01

Rossmann Robin Jack initial ownership report (2 holdings)

LOWN CHRISTIAN M. sold 5,597 shares of Common Stock, par value $0.01 per share at $29.36 on 2026-07-01

Sams Louise S bought 8,262 shares of Common Stock, par value $0.01 per share at $N/A on 2026-06-23

Brunner Angelique G. bought 8,262 shares of Common Stock, par value $0.01 per share at $N/A on 2026-06-23

McCarthy Christine M bought 8,262 shares of Common Stock, par value $0.01 per share at $N/A on 2026-06-23

Glaser Rachel C bought 8,262 shares of Common Stock, par value $0.01 per share at $N/A on 2026-06-23

BERISFORD JOHN L bought 8,262 shares of Common Stock, par value $0.01 per share at $N/A on 2026-06-23

Musslewhite Robert W bought 8,262 shares of Common Stock, par value $0.01 per share at $N/A on 2026-06-23

Hill John W bought 8,262 shares of Common Stock, par value $0.01 per share at $N/A on 2026-06-23

Cann Cynthia Cammett sold 461 shares of Common Stock, par value $0.01 per share at $32.04 on 2026-06-15

FLORANCE ANDREW C bought 68,330 shares of Common Stock, par value $0.01 per share at $35.17 on 2026-05-01; FLORANCE ANDREW C bought 3,100 shares of Common Stock, par value $0.01 per share at $35.82 on 2026-05-01