NYSE: TDG · Aerospace & Defense
TransDigm Group (TDG) fair value: undervalued or overvalued?
As of 26 Sep 2026, Faircurve's model values TransDigm Group (TDG) at $1,318.01 a share. The stock last closed at $1,090.38, which puts the model's fair value 20.9% above the price. On the model's bands that reads as Undervalued.
Revalued . Price is the close of 2 Oct 2026. TransDigm Group Incorporated.
Faircurve Insights · 26 Sep 2026
TransDigm Group Incorporated is a global aerospace enterprise specializing in the development, manufacturing, and distribution of a wide array of aircraft components.
On 26 Sep 2026, Faircurve's model found a fair value of $1,318.01 a share, the midpoint of 2,000 simulations. The previous run, on 19 Sep 2026, gave $1,287.84, with the fair value moving +2.3%. The calibrated range over 63 trading days is $1,105.78 to $1,607.07, built from the fair value, and calibrated weekly against realised prices (4,327 past valuations, refreshed 26 Sep 2026). Ranges built this way held the price 60% of the time at this horizon. The model's evidence grade is Medium.
The company's overall quality score is 53 out of 100, a score against comparable companies. The model compares it with Northrop Grumman Corporation, L3Harris Technologies, Inc., General Dynamics Corporation, Howmet Aerospace Inc., Axon Enterprise, Inc., Lockheed Martin Corporation, and The Boeing Company. Moves around the last 8 earnings reports include -2.4% on 4 Aug 2026, +7.3% on 5 May 2026, and -11.9% on 3 Feb 2026. The median size of these moves, ignoring direction, is 5.3%.
Written from the figures on this page for the 26 Sep 2026 valuation and checked by rule before publishing: every number is one printed here, no forecast, no instruction. The price, the gap and the verdict are the page's own and change daily. Not a recommendation.
What price range does the model give TDG?
The calibrated range for TDG over 63 trading days is $1,105.78 to $1,607.07. There is no live options data for this stock, so the range is built from the fair value and calibrated weekly against realised prices (n = 4,327 past valuations, refreshed 26 Sep 2026). Ranges built this way held the price 60% of the time at this horizon.
The price is below this range. For names with fair value 15 to 30% above price, the calibrated range has held the price 50% of the time over 63 trading days, and 47% ended below it; the typical move was +4.1%.
The model's own simulated range, from the 20th to the 80th percentile of its runs, is $892.95 to $1,872.77. In 63% of the simulations the fair value came out above the price the model ran on.
How does TDG score on business quality?
TransDigm Group's overall quality score is 53 out of 100. Each factor below is a score against comparable companies, not a percentile of the metric beside it.
| Factor | Score (0 to 100) | Headline measure | Peer median |
|---|---|---|---|
| ProfitabilityReturn on invested capital against the peer group, with a bonus for an improving trend. | 74 | 19.5%ROIC | 13.4% |
| Earnings qualityHow much of reported profit is cash: free cash flow to net income, and the accrual ratio (the share of earnings that is not cash). | 33 | 0.91xFCF / net income | 1.16x |
| Growth qualityTrailing revenue growth, forward growth from consensus, and the direction of analyst estimate revisions. | 54 | 11.2%Revenue growth, trailing | 12.7% |
| Capital disciplineReinvestment efficiency (capital spending per unit of revenue) and net buybacks. | 82 | 2.9%Net buybacks / market value | 0.1% |
| Balance sheetNet debt to EBITDA and interest coverage. | 6 | 6.15xNet debt / EBITDA | 1.62x |
| StabilityDownside volatility of the EBITDA margin over the last five years. | 47 | 2.3 ptsEBITDA margin downside volatility, 5y | 2.3 pts |
How does TDG compare with similar companies?
The companies in aerospace & defense closest to TransDigm Group in market value, each on the same model and the same date.
| Company | Last close | Model fair value | Gap | Model verdict |
|---|---|---|---|---|
| NOC Northrop Grumman Corporation | $478.00 | $521.95 | +9.2% | Fairly valued |
| HONA Honeywell Aerospace Inc | $154.63 | $179.43 | +16.0% | Data under review |
| LHX L3Harris Technologies, Inc. | $236.60 | $240.04 | +1.5% | Fairly valued |
| GD General Dynamics Corporation | $330.09 | $355.70 | +7.8% | Fairly valued |
| HWM Howmet Aerospace Inc. | $231.27 | $191.84 | -17.0% | Overvalued |
| AXON Axon Enterprise, Inc. | $413.35 | $428.19 | +3.6% | Fairly valued |
| LMT Lockheed Martin Corporation | $505.41 | $561.30 | +11.1% | Fairly valued |
| BA The Boeing Company | $193.56 | $154.99 | -19.9% | Overvalued |
When does TDG report earnings, and how has the stock reacted?
TransDigm Group's next earnings report is scheduled for 11 Nov 2026. Companies can move their dates.
Options prices on 2 Oct 2026 imply a move of about 4.1% in either direction through the nearest expiry, about 13 days out. That is the size the market is pricing, not a direction.
How TDG moved around its last 8 earnings reports
Each move runs from the last close before the report to the first close after it, so it covers companies that report before the open and after the close. The median size across these 8 reports, ignoring direction, was 5.3%.
| Report date | Two session move |
|---|---|
| 4 Aug 2026 | -2.4% |
| 5 May 2026 | +7.3% |
| 3 Feb 2026 | -11.9% |
| 12 Nov 2025 | +2.4% |
| 5 Aug 2025 | -12.9% |
| 6 May 2025 | -6.1% |
| 4 Feb 2025 | -4.5% |
| 7 Nov 2024 | -2.3% |
TransDigm Group at a glance
TransDigm Group Incorporated is a global aerospace enterprise specializing in the development, manufacturing, and distribution of a wide array of aircraft components.
- Market value
- $62.4B
- Sector
- Industrials
- Industry
- Aerospace & Defense
- Revenue expected, next twelve months
- $11.6B
- Consensus revenue growth, next fiscal year
- +19.0%
- Analysts with estimates
- 14
- Beta to the US market
- 0.63
- First valued by Faircurve
- 1 May 2026
How the fair value is worked out: the model prices TransDigm Group on the value of the whole business, debt included, against the operating profit analysts expect next year (forward EV/EBITDA), runs 2,000 simulations across its inputs and takes the midpoint. The full method is documented here.
What changed in the latest valuation?
On 19 Sep 2026 the model's fair value for TDG was $1,287.84. As of 26 Sep 2026 it is $1,318.01, a change of +2.3%. The model revalues every stock it covers each week, and again after an earnings report.
Questions about TransDigm Group's valuation
Is TransDigm Group stock undervalued or overvalued?
On Faircurve's model, TDG reads as Undervalued as of 26 Sep 2026. The model's fair value is $1,318.01 a share against a last close of $1,090.38, a gap of +20.9%.
What is TDG's fair value?
$1,318.01 a share as of 26 Sep 2026, the midpoint of 2,000 simulations. The model's own 20th to 80th percentile range is $892.95 to $1,872.77.
What price range does the model give TDG?
$1,105.78 to $1,607.07 over 63 trading days. Ranges built this way held the price 60% of the time across 4,327 past valuations, refreshed 26 Sep 2026.
When does TransDigm Group report earnings next?
The next report is scheduled for 11 Nov 2026. Companies can move their dates.
How much has TDG moved on past earnings reports?
Across its last 8 reports the median two session move was 5.3%, ignoring direction. The largest was -12.9% around the report of 5 Aug 2025.
How confident is the model in this valuation?
The model's evidence grade for TDG is medium. The grade looks at how complete the inputs are, how many comparable companies there are and how closely they agree, and how wide the range of outcomes is. It is not a probability that the fair value is right, or that the price reaches it.