TransDigm Reported Earnings Last Week. Here's How This Quiet Aerospace Stock Turned $10,000 Into a Fortune.

TransDigm reported fiscal Q3 results that beat expectations, with sales jumping 23% year-over-year to $2.74 billion and adjusted EBITDA climbing 19% to $1.5 billion. The aerospace and defense parts supplier has compounded wealth at a 23.1% annualized rate since its 2006 IPO, transforming an initial $10,000 investment into nearly $500,000. Shares priced at $21 per share at the IPO now trade at $1,225.25, despite a recent pullback.

The company's performance rests on three pillars: a serial acquisition model that rolls up niche aerospace suppliers, quasi-monopoly positions in mission-critical components where switching costs run high, and pricing power that lets it pass through inflation to customers locked into long-term aircraft programs. The combination has allowed TransDigm to maintain margins through cycles while growing revenue through both organic demand recovery in commercial aviation and strategic M&A.

The latest quarter demonstrates the strategy still works. Double-digit top-line growth paired with sustained EBITDA margins near 55% shows the business model remains intact as air traffic normalizes post-pandemic and defense budgets stay elevated.