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Identity verified against TransDigm Group Incorporated's FY2025 Form 10-K and Q2 FY2026 SEC filing, CIK 0001260221.

TransDigm Group Incorporated

TransDigm Group Incorporated has direct Aircraft Aftermarket exposure. High and direct. Q2 FY2026 net sales were $2,544 million, up 18.3%; organic sales grew 11.0%, commercial transport aftermarket grew about 16%, and EBITDA As Defined was $1,337 million at a 52.6% margin. Aftermarket price versus volume and acquisition contribution, customer-level concentration by channel, licensed current valuation and reviewer acceptance remain unresolved.

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Reviewed company research · researched 2026-07-29 · not an individual investment recommendation
Listing
public
Ticker
TDG
Exchange
NYSE
HQ
—
Currency
USD
SEC CIK
0001260221
Investment case

How this company captures the theme economics

Competitive position

Supplier of highly engineered, predominantly proprietary aircraft components with substantial commercial and military aftermarket exposure. Aftermarket price versus volume and acquisition contribution, customer-level concentration by channel, licensed current valuation and reviewer acceptance remain unresolved.

Scarce assets

Scarce assets in this value chain include engine shop-visit capacity and induction slots (rolls-royce added capacity in derby, dahlewitz, singapore and jvs in beijing and istanbul; standardaero/mtu ramping leap/cfm56 lines), certified parts supply, including castings, forgings and superalloy/titanium inputs (iata and oliver wyman both flag raw-material shortages), specialist mro labor (~41% of u.s. certified mechanics over 60; ~45,000 retirements expected over a decade).

Products, segments, and customers

TransDigm designs and supplies highly engineered aircraft components, most of them proprietary, with sales across commercial OEM, commercial aftermarket and defense channels.

Theme capture

High and direct. Q2 FY2026 net sales were $2,544 million, up 18.3%; organic sales grew 11.0%, commercial transport aftermarket grew about 16%, and EBITDA As Defined was $1,337 million at a 52.6% margin.

Conditions

What must be true

  1. Separate price, volume and acquisition effects in aftermarket growth; monitor customer or regulatory pressure and complete licensed valuation before human review.
  2. Aftermarket price versus volume and acquisition contribution, customer-level concentration by channel, licensed current valuation and reviewer acceptance remain unresolved.

Identifiable catalysts

  • Forthcoming quarterly and annual issuer filings
  • Theme-level catalysts detailed in the Aircraft aftermarket scarcity brief
Theme materiality

1 mapped theme

Exposure statements are evidence-qualified. Materiality is only claimed where disclosure supports it.

Supplier of highly engineered, predominantly proprietary aircraft components with substantial commercial and military aftermarket exposure.

Aircraft aftermarket scarcity

High and direct. Q2 FY2026 net sales were $2,544 million, up 18.3%; organic sales grew 11.0%, commercial transport aftermarket grew about 16%, and EBITDA As Defined was $1,337 million at a 52.6% margin.

Evidence
TransDigm's SEC-filed Q2 FY2026 release directly supports the current results and aftermarket growth. Its FY2025 Form 10-K reports approximately 55% of sales from aftermarket channels; current licensed valuation remains unavailable.
Materiality
disclosed — The FY2025 Form 10-K quantifies aftermarket at approximately 55% of sales and the Q2 release quantifies current commercial aftermarket growth, establishing direct materiality.
Financial evidence

Official SEC filing evidence

Reference period: FY2025 and Q2 FY2026.

  • Net sales$8.83 billion
    FY2025[1]
  • Net sales growth11.2%
    FY2025[1]
  • Aftermarket share of salesApproximately 55%
    FY2025[1]
  • Net sales$2,544 million
    Q2 FY2026[2]
  • Commercial transport aftermarket growthApproximately 16%
    Q2 FY2026[2]
  • EBITDA As Defined margin52.6%
    Q2 FY2026[2]

Limitation: Aftermarket price versus volume and acquisition contribution, customer-level concentration by channel, licensed current valuation and reviewer acceptance remain unresolved. Figures are issuer-reported and are not market-derived valuation data.

Risks

Material risks and break conditions

Material risks

  • Delivery normalization is already underway: H1 2026 was Boeing's best first half since 2018 (+12% YoY) and Airbus's best since 2019 (+15%), with easing engine-supply bottlenecks cited — faster-than-expected recovery compresses the scarcity premium.
  • Engine durability improvement is an explicit OEM program: Rolls-Royce guides shop visits down to 1,300-1,400 mid-term on time-on-wing gains; success on GTF and LEAP fixes would cut shop-visit growth and spare-parts demand.

Thesis-break conditions

  • Combined Airbus+Boeing deliveries sustain an annualized run-rate above ~1,400 aircraft (versus 665 in H1 2026) for two consecutive quarters — delivery normalization break.
  • Rolls-Royce reports or guides shop visits at or below 1,400 before 2028, or GE/Safran report civil spare-parts growth below 5% YoY for two consecutive quarters — engine durability / demand break.
Investability conclusion

Where the evidence lands

The FY2025 Form 10-K quantifies aftermarket at approximately 55% of sales and the Q2 release quantifies current commercial aftermarket growth, establishing direct materiality. The subject remains NOT_READY pending human review, unresolved diligence and licensed current valuation; this is not a personalized recommendation.

Next diligence

  1. Separate price, volume and acquisition effects in aftermarket growth; monitor customer or regulatory pressure and complete licensed valuation before human review.
Source ledger

Identity and evidence sources

Identity was verified against official issuer, filing, exchange, or regulator sources where available.

  1. TransDigm Group Incorporated FY2025 Form 10-KSEC EDGAR · primary · published 2025-11-12 · accessed 2026-07-29
  2. TransDigm Group Fiscal 2026 Second Quarter ResultsSEC EDGAR · primary · published 2026-05-05 · accessed 2026-07-29