BA vs TDG: Boeing and Transdigm Group compared
The short version
From the latest prices and each company's SEC filings. Who's ahead on each measure, not which to buy.
- Boeing is the larger company, worth $137.5B, about 2.2 times Transdigm Group.
- Transdigm Group grew revenue faster over the last year (+22.5% vs +8.0%).
- Transdigm Group keeps more of each dollar of revenue as operating profit (46.0% vs 4.9%).
- On earnings, Transdigm Group is the cheaper stock (34.8x vs 68.7x).
Side by side
The stronger figure is shaded where higher (or, for valuation multiples, lower) reads as better. How the implied growth works.
| Measure | BA | TDG |
|---|---|---|
| Market cap | $137.5B | $62.4B |
| Share price | $190.37 | $1,107.99 |
| Revenue (last fiscal year) | $89.5B | $8.8B |
| Free cash flow (last fiscal year) | -$1.9B | $1.8B |
| Revenue growth, last year | +8.0% | +22.5% |
| Revenue growth per year, last 5 fiscal years | +9.5% | +16.5% |
| Operating margin | 4.9% | 46.0% |
| Net margin | 2.6% | 21.3% |
| Return on equity | 39.9% | — |
| P/E (trailing) | 68.7x | 34.8x |
| Price / free cash flow | — | 34.4x |
| EV / EBITDA | 23.5x | 19.5x |
| FCF growth the price implies | — | 12.1% |
| Dividend yield | — | — |
| Debt / equity | 26.2x | — |
| Fundamental grade | D | B |
| Superinvestors holding it | 9 | 9 |
| Insider purchases, last 12 months | 10 | 8 |
Results from SEC filings
Revenue and free cash flow by fiscal year, from each company's 10-K filings.
Boeing
| Year | Revenue | Free cash flow | Op. margin |
|---|---|---|---|
| 2021 | $62.3B | -$4.4B | -4.6% |
| 2022 | $66.6B | $2.3B | -5.3% |
| 2023 | $77.8B | $4.4B | -0.99% |
| 2024 | $66.5B | -$14.3B | -16.1% |
| 2025 | $89.5B | -$1.9B | 4.8% |
Transdigm Group
| Year | Revenue | Free cash flow | Op. margin |
|---|---|---|---|
| 2021 | $4.8B | $808M | 35.2% |
| 2022 | $5.4B | $829M | 40.8% |
| 2023 | $6.6B | $1.2B | 44.4% |
| 2024 | $7.9B | $1.9B | 44.5% |
| 2025 | $8.8B | $1.8B | 47.2% |
Where the revenue comes from
Boeing · by segments, 2025
Commercial Airplanes$41.5B46%
Defense, Space & Security$27.2B30%
Global Services$20.9B23%
Transdigm Group · by segments, 2025
Power & Control$4.6B52%
Airframe$4.1B47%
Non-aviation$160M2%
Compare them in fullFifteen years of statements, quarterly results, DCF and IRR models, and any number of peers side by side.
Open BA in InvestinglyQuestions
Which is bigger, Boeing or Transdigm Group?
Boeing (BA), at $137.5B against $62.4B.
Is BA or TDG cheaper?
By trailing P/E, Transdigm Group (34.8x) is cheaper than Boeing (68.7x). A lower multiple can also mean the market expects less growth.
Which grows faster, BA or TDG?
Transdigm Group: revenue grew +22.5% over the last year, against +8.0%.
Prices and ratios as of the last daily update; statements from SEC filings. Information only, not investment advice.