Stocks making the biggest moves in the premarket: Walmart, Vodafone, Getty Images and more

Take a look at some of the biggest movers in the premarket:

Walmart (WMT) – Walmart shares surged 6.9% in the premarket after the retailer reported better-than-expected quarterly profit and revenue, and also saw comparable store sales exceed estimates. Walmart also announced a $20 billion share repurchase program.