The Billionaire Famous for Betting Big on Micron Just Bought Airline Stocks

David Tepper’s Appaloosa Management disclosed brand-new stakes in American Airlines and Boeing in its Q2 2026 13F filing (positions as of June 30, 2026, disclosed roughly 45 days later). That filing pulls the billionaire who nailed the memory-chip cycle into aviation. The move deserves scrutiny because of what it signals about where he is hunting next.

The Micron Call That Earned the Microphone

Tepper tripled Appaloosa’s Micron stake in early 2026. The timing was ideal. Micron Technology (NASDAQ:MU | MU Price Prediction) has since ripped: shares closed at $971.66 on August 14, 2026, up 240.65% year to date and 676.79% over the trailing year. Rising fundamentals continue to validate the trade: fiscal Q3 revenue of $41.5 billion (up 346% year-over-year), non-GAAP EPS of $25.11, and Q4 guidance of $50 billion in revenue with EPS of $31 plus or minus $1. SanDisk (Nasdaq: SNDK), a position that Tepper completely sold out of last quarter, just issued 2028 to 2030 guidance that points to gross margins stayign elevated at 80% in that period. That’s extremely bullish for memory stocks, as it points to longer duration pricing power than the market is currently expecting.

Appaloosa returned 32% in the first half of 2026, and Bloomberg reported on July 6, 2026 that the gain was driven by memory-chip makers. Even after trimming in Q2 2026, Micron remained one of Appaloosa’s largest disclosed lines at 975,000 shares valued at $1,125,432,750, with the position reduced by 690,000 shares. He took some chips off the table but did not walk away.

The New Trade: Both Ends of the Aviation Chain

The fresh disclosures tell the story. Appaloosa opened a new position in American Airlines of 7,500,000 shares valued at $135,525,000, one of its largest new positions by share count in the entire filing. It also opened a new position in Boeing of 800,000 shares valued at $173,176,000. American Airlines Group (NASDAQ:AAL) is the carrier. Boeing (NYSE:BA) builds the aircraft. Buying both signals a view on aviation as a system, not a single-company bet.

Tepper was not alone. In the same quarter, Berkshire Hathaway added 17,510,544 Delta Air Lines shares, and Stanley Druckenmiller’s Duquesne Family Office opened a new Delta position of 603,000 shares and added 532,300 shares to United Airlines. Three of Wall Street’s most respected allocators moved into aviation in the same quarter.

The Cyclical Playbook, Reapplied?

Tepper built his 2026 returns on a call in memory, the most brutal boom-and-bust industry in technology. Airlines are the other classic deep-cyclical trade. Q2 fundamentals frame a turn: American posted record quarterly revenue up 16.3% year-over-year, with managed corporate revenue up 26% and premium unit revenue up more than 13%, though CFO Devon May flagged a nearly $6 billion year-over-year fuel headwind for the full year. Boeing is running 737 MAX at 47 per month with a path to 52, delivered 171 airplanes in Q2 (highest since 2018), and sits on a $715 billion backlog with free cash flow guidance of $1 to $3 billion.

Valuations reflect early-cycle positioning. American closed at $14.83, down 3.26% year to date. Boeing closed at $231.67, up 6.7% year to date. Analyst target on American sits at $19.03; Boeing’s is $274.85.

Should Retail Follow?

Holdings are point-in-time as of June 30, 2026 and are not necessarily current positions. That caveat matters more with cyclicals. The reason to pay attention is the convergence: multiple elite allocators, both airframer and carrier, moving into a sector coming off a cost shock with capacity discipline returning. For a retirement-focused investor, Boeing offers backlog visibility with less leverage risk than American, which still carries a negative book value of -$6.00 per share. Worth researching, but not worth mimicking blindly.

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