LongTDGSeptember 30, 2026

Mar Vista Investment Partners, LLC on TransDigm Group Incorporated

Thesis

Mar Vista considers the recent weakness in TransDigm an opportunity to increase exposure to a high-quality aerospace aftermarket franchise at a more attractive valuation. The stock declined as investors became concerned that rising jet fuel prices would pressure airline profitability, reduce passenger demand and encourage airlines to accelerate replacement of older aircraft. These developments could theoretically reduce maintenance shop visits and demand for replacement aircraft components. However, Mar Vista has not observed meaningful deterioration in TransDigm's operating performance and believes the company's revenue mix and profitability provide resilience. With underlying aerospace fundamentals remaining sound and long-term air travel growth expected to continue around 5% annually, the firm believes the market is overreacting to short-term uncertainty rather than accurately reflecting TransDigm's durable earnings power.

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

Key risks

  • Higher aviation fuel costs could weaken airline profitability and reduce spending on maintenance and replacement components.
  • Ticket price increases and lower passenger demand could encourage airlines to cut less profitable routes.
  • Accelerated aircraft retirement and fleet modernization could reduce maintenance requirements for older aircraft.
  • Prolonged weakness in the aerospace aftermarket could pressure revenue growth, margins and investor valuations.

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