Munger Mode rating: 3 out of 5 — Hold. Our own rating from the research report below, on business quality first: moat durability and management, with price separating the top three.
Warren here, with Charlie's voice firmly in my ear. TransDigm is one of the most remarkable business models we have ever studied — a collection of sole-source, proprietary aerospace components that generate razor-blade aftermarket revenue for the 25-to-30-year life of every aircraft they fly on, with EBITDA margins of 52.8% that would make even our best businesses blush. The moat is genuine, wide, and durable. Management allocates capital with a rationality we rarely see outside our own shareholder letters. And yet we rate it a 3, not higher. Two things stay our hand. First, the balance sheet: $33 billion of gross debt against negative $9.8 billion of shareholders' equity is a capital structure we would never choose, and while the aftermarket annuity supports it, roughly 40% of operating income now goes out the door as interest. The equity holder stands at the end of a long line.
Recent filings analysed: 8-K (2026-09-14), 8-K (2026-09-14), 8-K (2026-09-14), 8-K (2026-08-04).
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