Costar Group, INC Form 4 insider transactions

CoStar Group's President of Marketplaces, Frederick G. Saint, reported the forfeiture of performance-based restricted stock and shares withheld for tax obligations.

CoStar Group's President and CEO, Andrew C. Florance, reported the forfeiture of performance-based restricted stock and the disposition of shares for tax obligations.

CoStar Group's Senior VP, Global Operations, Lisa Ruggles, reported the forfeiture of 17,583 performance-based restricted shares and the disposition of 3,219 shares for tax withholding.

CoStar Group Director John W. Hill sold 2,250 shares of common stock for $68.68 per share under a pre-arranged trading plan.

CoStar Group's Chief Accounting Officer, Cynthia Cammett Cann, sold 1,841 shares of common stock for approximately $126,640.

CoStar Group Director Christine M. McCarthy filed a Form 4 indicating a planned acquisition of 2,973 shares of common stock on September 9, 2025.

CoStar Group Director Louise S. Sams acquired 3,291 shares of common stock, increasing her direct beneficial ownership to 19,409 shares.

CoStar Group Director John L. Berisford has filed a Form 4 indicating a future acquisition of 2,973 shares of common stock under a Rule 10b5-1 plan.

CoStar Group Director John W. Hill acquired 3,177 shares of common stock on September 9, 2025, increasing his beneficial ownership to 20,481 shares.

CoStar Group Director Robert W. Musslewhite acquired 3,121 shares of common stock on September 9, 2025, under a pre-arranged trading plan.

CoStar Group Director Rachel C. Glaser reported the acquisition of 3,143 shares of common stock on September 9, 2025, as part of a routine insider transaction.

CoStar Group Director Angelique G. Brunner acquired 3,143 shares of common stock, increasing her direct beneficial ownership to 10,166 shares.

CoStar Group's President of Marketplaces, Frederick G. Saint, sold 25,000 shares of common stock for an average price of $90.33 per share under a pre-arranged trading plan.

CoStar Group's Chief Accounting Officer, Cynthia Cann, disposed of 719 shares of common stock to cover tax withholding obligations.

CoStar Group's President of Marketplaces, Frederick G. Saint, disposed of 1,436 shares of common stock to cover tax withholding obligations.

CoStar Group's President of Marketplaces, Frederick G. Saint, sold 25,000 shares of common stock for approximately $93.23 per share under a Rule 10b5-1 plan.

CoStar Group's Chief Accounting Officer, Cynthia Cammett Cann, reported the sale of 2,033 shares of common stock at $92.85 per share, executed under a Rule 10b5-1 trading plan.

CoStar Group's Chief Financial Officer, Christian M. Lown, reported the disposition of 4,666 shares of common stock on July 1, 2025, at a price of $80.4 per share, primarily for tax liability.

CoStar Group's Chief Accounting Officer, Cynthia Cammett Cann, reported the disposition of 461 shares of common stock to cover tax withholding obligations.

Frederick G. Saint, President of Marketplaces at CoStar Group, Inc. (CSGP), reported the sale of 25,000 shares of common stock for approximately $2.03 million.

Lisa Ruggles, Senior VP of Global Operations at CoStar Group, Inc. (CSGP), reported a routine disposition of 12 shares of common stock valued at $73.56 per share to cover tax withholding obligations.

Lisa Ruggles, Senior VP at CoStar Group, reports disposing of 1,958 shares of common stock to cover tax obligations.

Cynthia Cammett Cann, Chief Accounting Officer of Costar Group, sold 1,191 shares of common stock on March 15, 2025, to satisfy tax withholding obligations.

Gene Boxer, General Counsel and Secretary of CoStar Group, Inc., disposed of 481 shares of common stock on March 15, 2025, to cover tax obligations.

Michael J. Desmarais, Chief Human Resources Officer of Costar Group, sold 3,641 shares of common stock on March 15, 2025, to cover tax obligations.

Frank Simuro, Chief Technology Officer of CoStar Group, sold 5,700 shares of common stock on March 15, 2025, to satisfy tax obligations.

Cynthia Cammett Cann, Chief Accounting Officer of Costar Group, reports several transactions involving the company's common stock.

Cynthia Cammett Cann, Chief Accounting Officer of Costar Group, acquired 1,498 shares of common stock through the company's Management Stock Purchase Plan.

Gene Boxer, General Counsel and Secretary of CoStar Group, acquired shares through the company's Management Stock Purchase Plan.

Andrew Florance, CEO of CoStar Group, reports acquiring common stock and deferred stock units through a management stock purchase plan.