Shares in Anywhere Real Estate soared more than 45% in afternoon trading Monday. Compass runs a platform for use by real estate agents in customer relationship management, marketing and other tasks. It also operates its namesake real estate brokerage and Christie’s International Real Estate. Anywhere Real Estate is home to several major real estate brokerage brands: Century 21, Better Homes and Gardens, Coldwell Banker, Corcoran, ERA and Sotheby’s International Realty. In March, mortgage company Rocket Cos. agreed to acquire competitor Mr. Cooper in an all-stock deal valued at $9.4 billion, just weeks after acquiring real estate listing company Redfin in an all-stock deal valued at $1.75 billion.