The Billionaire Famous for Betting Big on Micron Just Bought Airline Stocks - 24/7 Wall St. The Billionaire Famous for Betting Big on Micron Just Bought Airline Stocks By Eric Bleeker Published Aug 18, 9:05AM EDT Quick Read Tepper's Appaloosa opened 7.5 million shares in AAL and 800,000 in Boeing as Berkshire and Druckenmiller also entered aviation the same quarter. Tepper tripled Appaloosa's Micron stake in early 2026, helping the fund return 32% in H1 2026 as MU surged 677% over the trailing year. Boeing ...