Walmart joining forces with Sainsbury in the U.K.

BENTONVILLE, Ark. — Walmart plans to merge its Asda unit in the United Kingdom with J. Sainsbury PLC, in a move that would unseat Tesco PLC as the country’s top retailer. Asda currently ranks No. 3 in market share, and Sainsbury is No. 2. Under the terms of the deal, Walmart would have a 42%