The short version

From the latest prices and each company's SEC filings. Who's ahead on each measure, not which to buy.

  • Howmet Aerospace is the larger company, worth $83.5B, about 1.3 times Transdigm Group.
  • Howmet Aerospace grew revenue faster over the last year (+24.1% vs +22.5%).
  • Transdigm Group keeps more of each dollar of revenue as operating profit (46.0% vs 27.4%).
  • On earnings, Transdigm Group is the cheaper stock (34.8x vs 48.6x).
  • Howmet Aerospace's price assumes faster free cash flow growth: about 19% a year, against 12% for Transdigm Group (reverse DCF).

Side by side

The stronger figure is shaded where higher (or, for valuation multiples, lower) reads as better. How the implied growth works.

MeasureHWMTDG
Market cap$83.5B$62.4B
Share price$225.26$1,107.99
Revenue (last fiscal year)$8.3B$8.8B
Free cash flow (last fiscal year)$1.4B$1.8B
Revenue growth, last year+24.1%+22.5%
Revenue growth per year, last 5 fiscal years+13.5%+16.5%
Operating margin27.4%46.0%
Net margin20.5%21.3%
Return on equity32.6%—
P/E (trailing)48.6x34.8x
Price / free cash flow58.4x34.4x
EV / EBITDA33.8x19.5x
FCF growth the price implies19.1%12.1%
Dividend yield0.22%—
Debt / equity1.31x—
Fundamental gradeCB
Superinvestors holding it49
Insider purchases, last 12 months28

Results from SEC filings

Revenue and free cash flow by fiscal year, from each company's 10-K filings.

Howmet Aerospace

YearRevenueFree cash flowOp. margin
2021$5.0B$250M15.0%
2022$5.7B$540M16.2%
2023$6.6B$682M18.1%
2024$7.4B$977M22.0%
2025$8.3B$1.4B24.8%

Transdigm Group

YearRevenueFree cash flowOp. margin
2021$4.8B$808M35.2%
2022$5.4B$829M40.8%
2023$6.6B$1.2B44.4%
2024$7.9B$1.9B44.5%
2025$8.8B$1.8B47.2%

Where the revenue comes from

Howmet Aerospace · by segments, 2025

Engine Products$4.3B52%
Fastening Systems$1.7B21%
Engineered Structures$1.1B14%
Forged Wheels$1.0B13%

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.
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Questions

Which is bigger, Howmet Aerospace or Transdigm Group?

Howmet Aerospace (HWM), at $83.5B against $62.4B.

Is HWM or TDG cheaper?

By trailing P/E, Transdigm Group (34.8x) is cheaper than Howmet Aerospace (48.6x). A lower multiple can also mean the market expects less growth.

Which grows faster, HWM or TDG?

Howmet Aerospace: revenue grew +24.1% over the last year, against +22.5%.

Prices and ratios as of the last daily update; statements from SEC filings. Information only, not investment advice.