Jerry Murray, a vice president of finance and logistics, departed his job after seven years, Dudley writes.
Leaked emails in February revealed that executives were concerned that not as many people were shopping at the mega-retailer. Murray also noted that sales were the worst they'd been in his seven years with the company.
News of the emails sent Wal-Mart shares plunging.
Since then, the retailer has been plagued by reports of bare shelves in stores as understaffed locations struggle to keep up.
Dudley reported that the current issues had nothing to do with Murray's departure.
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