Nvidia Corp. (NASDAQ:NVDA) reported a 265% year-over-year revenue growth for Q4 but disclosed a potential risk in its 10-K report due to increasing customer concentration, with an unnamed 'Customer A' accounting for 13% of FY24 revenue. This concentration, along with indirect customer purchases, represented 19% of total FY24 revenue. The company also noted a shift in geographic revenue, with a decrease in sales outside the US, attributed to the U.S.-China chip ban. Despite these concerns, Nvidia's stock rallied 9.07% in after-hours trading following the announcement of its quarterly results.