LongTDGSeptember 30, 2026

Mar Vista Investment Partners, LLC on TransDigm Group Incorporated

Thesis

Mar Vista continues to favor TransDigm despite weakness in commercial aerospace aftermarket stocks during the quarter. The decline was driven by concerns that elevated jet fuel costs would weaken airline economics, suppress travel demand and accelerate the retirement of older aircraft, potentially reducing maintenance visits and replacement-parts spending. The fund believes these concerns have not translated into meaningful deterioration in TransDigm's operating performance. The company's revenue mix and profitability provide resilience against industry pressures, while the underlying long-term air travel growth trend of approximately 5% annually remains intact. Mar Vista views the pullback as an opportunity to build exposure to a durable franchise at a more attractive valuation, with the market potentially underestimating its long-term earnings power.

“we believe their revenue mixes and profitability provide resilience against these pressures.”
Mar Vista Investment Partners, LLC — U.S. Quality Portfolio Commentary - Q3 2026

Key risks

  • High crude oil and jet fuel prices could pressure airline profitability and aftermarket spending.
  • Weaker passenger demand or airline route reductions could lower demand for maintenance and replacement parts.
  • Accelerated fleet replacement could reduce maintenance requirements for older aircraft.
  • A prolonged downturn in aerospace aftermarket activity could pressure revenue and margins.

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