Two of the nation’s biggest real estate services companies are combining in a deal that will bring Century 21, Compass and several other major brokerage brands under the same umbrella. Compass said Monday that it has agreed to acquire rival Anywhere Real Estate in an all-stock transaction. The merger will create a combined company valued at roughly $10 billion, including debt. Anywhere Real Estate's shares soared over 45% following the news, while Compass shares dropped about 16%. The merger will boost Compass's network of real estate agents from 40,000 to 340,000 globally. Compass expects to add over $1 billion in revenue from Anywhere's businesses.