Walmart is losing two senior executives after John Furner became CEO. Internal memos showed Tom Ward, COO of Sam’s Club, is retiring, while Cedric Clark, EVP of US store operations, is leaving the business. Walmart said a replacement for Clark would be named in the coming weeks. The changes follow earlier leadership promotions that made David Guggina CEO of Walmart US, Chris Nicholas CEO of Walmart International and Latriece Watkins CEO of Sam’s Club. (CNBC)