< PrevNext > 57. Walmart Bentonville, Ark. Share 2018 U.S.-Booked Air Volume: $75 millionBTN estimates that retail giant Walmart's U.S.-booked air volume rose $5 million, or 7 percent from BTN's 2017 estimate of $70 million. Walmart's revenue for the fiscal year ending Jan. 31, 2019, rose 2.8 percent year over year to $514.4 billion. Walmart U.S. contributed $331.7 billion in net sales, representing 65 percent of global net sales. Sam's Club, which operates in 44 U.S. states and Puerto Rico, represented 11 percent. Walmart International, representing 26 additional countries, contributed the remaining 24 percent. Serving that segment, the company acquired a majority stake in India-based e-commerce marketplace Flipkart during the past fiscal year. Operating, selling, general and administrative expenses, which include travel, represented 21 percent of net sales, down 0.5 percentage points from the previous year. According to its annual report, Walmart employed 2.2 million associates—1.5 million in the U.S. and 700,000 elsewhere—down from 2.3 million a year prior.