Billionaire investor David Tepper's Appaloosa Management increased its stake in Amazon.com (AMZN) by 15.74% during the second quarter of 2026, bringing its total to 5 million shares. According to the firm's required quarterly 13F filing, the value of this position grew from $899.73 million to $1.19 billion, making it the fund's largest holding at over 15% of its reported portfolio.
This disclosure, filed on August 14, reflects trades made up to June 30 and provides a delayed look at the hedge fund's positioning. The move came during a quarter where Amazon's cloud computing division, AWS, showed significant growth, with revenue accelerating at its fastest rate in over four years. Appaloosa's increased investment in Amazon was part of a broader portfolio concentration in companies poised to benefit from AI infrastructure.