SPR vs TDG

For growth investors, TransDigm Group Incorporated (TDG) is the stronger pick with 11.

2% revenue growth year-over-year, versus 4. 4% for Spirit AeroSystems Holdings, Inc. (SPR). TransDigm Group Incorporated (TDG) offers the better valuation at 38. 5x trailing P/E (31. 8x forward), making it the more compelling value choice. Analysts rate TransDigm Group Incorporated (TDG) a "Buy" — based on 39 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On forward P/E, Spirit AeroSystems Holdings, Inc.

is actually cheaper at 31. 5x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, TransDigm Group Incorporated (TDG) delivered a total return of +142.

4%, compared to -10. 6% for Spirit AeroSystems Holdings, Inc. (SPR). Over 10 years, the gap is even starker: TDG returned +596. 5% versus SPR's -11. 2%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Spirit AeroSystems Holdings, Inc.

(SPR) is the lower-risk stock at 0. 67β versus TransDigm Group Incorporated's 0. 79β — meaning TDG is approximately 18% more volatile than SPR relative to the S&P 500.

By revenue growth (latest reported year), TransDigm Group Incorporated (TDG) is pulling ahead at 11.

2% versus 4. 4% for Spirit AeroSystems Holdings, Inc. (SPR). On earnings-per-share growth, the picture is similar: TransDigm Group Incorporated grew EPS 25. 2% year-over-year, compared to -208. 4% for Spirit AeroSystems Holdings, Inc.. Over a 3-year CAGR, TDG leads at 17. 6% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

TransDigm Group Incorporated (TDG) is the more profitable company, earning 23.

5% net margin versus -33. 9% for Spirit AeroSystems Holdings, Inc. — meaning it keeps 23. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TDG leads at 47. 2% versus -28. 3% for SPR. At the gross margin level — before operating expenses — TDG leads at 60. 1%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

On forward earnings alone, Spirit AeroSystems Holdings, Inc.

(SPR) trades at 31. 5x forward P/E versus 31. 8x for TransDigm Group Incorporated — 0. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for TDG: 31. 1% to $1617. 88.

In this comparison, TDG (13.

4% yield) pays a dividend. SPR does not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, TransDigm Group Incorporated (TDG) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

79), 13. 4% yield, +596. 5% 10Y return). Both have compounded well over 10 years (TDG: +596. 5%, SPR: -11. 2%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: SPR is a small-cap quality compounder stock; TDG is a mid-cap income-oriented stock. TDG pays a dividend while SPR does not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.