Amazon.com (NasdaqGS:AMZN) has started selling its custom Trainium AI chips directly to external companies, a move that puts Amazon into more direct competition with established semiconductor suppliers in the AI hardware market. The chips were previously used primarily within Amazon Web Services for internal and customer workloads. Amazon.com, trading at $247.49, is adding a new angle to its business by offering Trainium AI chips beyond its own cloud. The stock is up 86.3% over the past 3 years and 38.5% over 5 years, with a 9.3% return over the past year. For Amazon.com, opening up Trainium to external buyers lands directly on top of a balance sheet that is already stretching to fund AI infrastructure with debt. Recent fixed-income offerings span about US$23.7b of completed senior unsecured notes out to 2066 plus additional announced tranches, sitting alongside a planned US$25b US dollar bond sale, and the US$750m floating rate notes due 2029. Trainium sales to third parties align with the narrative that Amazon is leaning into custom AI chips and AWS infrastructure as long term growth drivers, turning heavy capex into revenue generating assets rather than pure cost centers.