Fortune magazine's annual list of the world's biggest companies is out, and Wal-Mart is back on top.
Wal-Mart regained the top spot on the Fortune 500 list, unseating energy giant Royal Dutch Shell, with nearly US$476 billion in revenue.
Samsung Electronics came in at 13, up four notches from last year and two slots higher than its main rival Apple.
A total of 17 Korean companies were listed, with SK Holdings and Hyundai Motor cracking the top 100 for the first time.
Overall, the combined revenue of the top 500 companies was $31.1 trillion, up 2.5 percent from last year.