WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP

WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP (WAB) — Investment Memo

🐂 The Bull Case (Warren’s voice)

• Why is the moat durable and why does it compound?
  WAB’s switching costs are literal — you cannot swap a certified brake valve without a 5‑year requalification. A 20,000‑ton train stops on WAB’s iron, and no railroad will risk a recall to save 2%. The aftermarket (35–40% of revenue) is high‑margin, recurring, and growing as digital monitoring contracts lock in customers for decades. The moat is widening slowly as digital intelligence and bolt‑on acquisitions (Frauscher, Dellner) deepen the ecosystem.

• What makes the economics exceptional — specifically?
  FCF beats net income ($1.5B vs $1.2B in 2025), margins have recovered from 4.0% (2019) to 10.5% (2025), and pricing power is proven — they raised aftermarket prices in 2024 without losing volume. The business spits out cash even in a normal year.

• At what price range does this become genuinely attractive to Berkshire?
  With an intrinsic value of $294/share (DCF: 14.1% FCF growth, 10% discount, 3% terminal), a 25% margin of safety puts entry at $220. A 50% margin — Buffett’s ideal — would be $147. At those levels, the debt overhang is priced in, and you’re buying a regulatory monopoly with a growing aftermarket tailwind.

🐻 The Bear Case (Charlie inverts)

• What are the 2–3 scenarios that permanently impair this business?

  1. Catastrophic train accident traced to a WAB part — fleet‑wide recall, regulatory redesign, and open door for Knorr‑Bremse or digital upstarts. Trust is the moat’s keystone; one bad weld cracks it.
  2. Leverage + recession trap — debt jumped $1.5B (to $5.5B) in 2025 to fund acquisitions. If freight volumes slump, interest coverage tightens, and the integrations (Frauscher, Dellner) become a cash vortex. The moat holds, but the stock doesn’t — and Berkshire doesn’t need forced sellers.
  3. Relentless dilution — EPS CAGR 5.2% vs NI CAGR 11.4% implies ~6% annual share count growth. That’s selling tickets to the parade. If management keeps issuing shares to fund empire‑building, owners get left with a shrinking slice of a mediocre ROE (10.5%).

• Most likely over what timeframe?
  The recession scenario is the most probable in the next 2–3 years. The catastrophic accident is low‑probability but high‑impact. Dilution is a slow bleed already happening.

💰 Valuation & Margin of Safety

• Intrinsic value estimate: $294/share (DCF as provided).
• 25% margin of safety entry: $220/share — conservative, assumes integration works and debt is managed.
• 50% margin of safety entry: $147/share — Buffett’s ideal, where the debt and dilution risks are fully discounted.
• Current state: The stock likely trades near or above $294 given the DCF. That makes it fair to expensive — no margin of safety. We would wait for a pullback to $220 or lower.

Verdict: WATCH

The moat is real but the balance sheet is stretched and management keeps diluting owners. At $294, you’re paying full price for mediocre returns on incremental capital. Wait for $220 or a clear sign that debt is being paid down and buybacks replace dilution.