HEI vs SPIR vs BA vs TDG

For growth investors, The Boeing Company (BA) is the stronger pick with 34.

5% revenue growth year-over-year, versus -35. 2% for Spire Global, Inc. (SPIR). Spire Global, Inc. (SPIR) offers the better valuation at 10. 0x trailing P/E, making it the more compelling value choice. Analysts rate HEICO Corporation (HEI) a "Buy" — based on 34 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 trailing P/E, Spire Global, Inc.

(SPIR) is the cheapest at 10. 0x versus The Boeing Company at 93. 2x. On forward P/E, TransDigm Group Incorporated is actually cheaper at 32. 0x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: TransDigm Group Incorporated wins at 1. 03x versus HEICO Corporation's 3. 14x — a reasonable growth-adjusted valuation.

Over the past 5 years, TransDigm Group Incorporated (TDG) delivered a total return of +140.

2%, compared to -79. 6% for Spire Global, Inc. (SPIR). Over 10 years, the gap is even starker: HEI returned +823. 0% versus SPIR's -78. 8%. 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), TransDigm Group Incorporated (TDG) is the lower-risk stock at 0.

79β versus Spire Global, Inc. 's 2. 93β — meaning SPIR is approximately 272% more volatile than TDG relative to the S&P 500. On balance sheet safety, Spire Global, Inc. (SPIR) carries a lower debt/equity ratio of 8% versus 10% for The Boeing Company — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), The Boeing Company (BA) is pulling ahead at 34.

5% versus -35. 2% for Spire Global, Inc. (SPIR). On earnings-per-share growth, the picture is similar: Spire Global, Inc. grew EPS 137. 8% year-over-year, compared to 25. 2% for TransDigm Group Incorporated. Over a 3-year CAGR, HEI leads at 26. 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.

Spire Global, Inc.

(SPIR) is the more profitable company, earning 71. 7% net margin versus 2. 5% for The Boeing Company — meaning it keeps 71. 7% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TDG leads at 47. 2% versus -121. 4% for SPIR. 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.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, TransDigm Group Incorporated (TDG) is the more undervalued stock at a PEG of 1. 03x versus HEICO Corporation's 3. 14x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, TransDigm Group Incorporated (TDG) trades at 32. 0x forward P/E versus 4979. 1x for The Boeing Company — 4947. 1x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for TDG: 30. 3% to $1617. 88.

In this comparison, TDG (13.

3% yield), BA (0. 2% yield) pay a dividend. HEI, SPIR do 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. 3% yield, +595. 3% 10Y return). Spire Global, Inc. (SPIR) carries a higher beta of 2. 93 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (TDG: +595. 3%, SPIR: -78. 8%), 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: HEI is a mid-cap high-growth stock; SPIR is a large-cap deep-value stock; BA is a mid-cap high-growth stock; TDG is a mid-cap income-oriented stock. TDG pays a dividend while HEI, SPIR, BA do 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.