CoStar Group Inc.'sboard on April 22 expanded its size and added a member.

The board increased its size to eight members and elected LauraCox Kaplan to fill the vacancy created by the increase. Kaplan serves as principal-in-chargeof government, regulatory affairs and public policy for PricewaterhouseCoopers,where she also serves on the global public policy and regulatory board, accordingto an April 27 filing.