KEY TAKEAWAYS Interpublic Group of Companies shares are surging in premarket trading on a report that Omnicom Group is in advanced talks to acquire its rival in an all-stock deal that would form the world's largest advertising company.

Omnicom Group will acquire Interpublic Group in a deal that will create the world’s largest advertising business, the companies confirmed Monday.A combined entity would have net revenue of more than $20 billion,