A key executive at Wal-Mart is leaving the troubled retailer, the company told CNBC on Thursday.
Stephen Quinn will retire from his post as executive vice president and chief marketing officer effective Jan. 31. Quinn joined the company 10 years ago and has served in his current position since 2007.
Shares of Wal-Mart were slightly lower in extended trade. Year to date, the retailer's stock is the worst performer in the Dow.