Bid & Ask: The Deals of the Week

1. New York-based Transatlantic Holdings (TRH) and Switzerland's Allied World Assurance Co. Holdings (AWH) agreed to a $3.2 billion merger that creates a reinsurer with operations in 18 countries.

2. Vallar, an investment vehicle founded by financier Nathaniel Rothschild, will pay $2.1 billion for 75 percent of PT Bumi Resources Minerals.