MLM vs LIN vs CAT vs APD

For growth investors, Caterpillar Inc.

(CAT) is the stronger pick with 4. 3% revenue growth year-over-year, versus -0. 5% for Air Products and Chemicals, Inc. (APD). Martin Marietta Materials, Inc. (MLM) offers the better valuation at 32. 7x trailing P/E (31. 5x forward), making it the more compelling value choice. Analysts rate Martin Marietta Materials, Inc. (MLM) a "Buy" — based on 40 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, Martin Marietta Materials, Inc.

(MLM) is the cheapest at 32. 7x versus Caterpillar Inc. at 49. 2x. On forward P/E, Air Products and Chemicals, Inc. is actually cheaper at 22. 9x — 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: Linde plc wins at 1. 11x versus Martin Marietta Materials, Inc. 's 3. 07x — a reasonable growth-adjusted valuation.

Over the past 5 years, Caterpillar Inc.

(CAT) delivered a total return of +301. 9%, compared to +13. 8% for Air Products and Chemicals, Inc. (APD). Over 10 years, the gap is even starker: CAT returned +1223% versus APD's +166. 7%. 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), Linde plc (LIN) is the lower-risk stock at 0.

24β versus Caterpillar Inc. 's 1. 54β — meaning CAT is approximately 541% more volatile than LIN relative to the S&P 500. On balance sheet safety, Martin Marietta Materials, Inc. (MLM) carries a lower debt/equity ratio of 53% versus 2% for Caterpillar Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Caterpillar Inc.

(CAT) is pulling ahead at 4. 3% versus -0. 5% for Air Products and Chemicals, Inc. (APD). On earnings-per-share growth, the picture is similar: Linde plc grew EPS 7. 1% year-over-year, compared to -110. 3% for Air Products and Chemicals, Inc.. Over a 3-year CAGR, CAT leads at 4. 4% 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.

Linde plc (LIN) is the more profitable company, earning 20.

3% net margin versus -3. 3% for Air Products and Chemicals, Inc. — meaning it keeps 20. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: LIN leads at 26. 3% versus -7. 3% for APD. At the gross margin level — before operating expenses — LIN leads at 43. 3%, 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, Linde plc (LIN) is the more undervalued stock at a PEG of 1. 11x versus Martin Marietta Materials, Inc. 's 3. 07x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, Air Products and Chemicals, Inc. (APD) trades at 22. 9x forward P/E versus 40. 1x for Caterpillar Inc. — 17. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for MLM: 13. 0% to $695. 30.

All stocks in this comparison pay dividends.

Air Products and Chemicals, Inc. (APD) offers the highest yield at 2. 4%, versus 0. 5% for Martin Marietta Materials, Inc. (MLM).

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

24), 1. 2% yield, +376. 9% 10Y return). Both have compounded well over 10 years (LIN: +376. 9%, MLM: +259. 4%), 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.

These companies operate in different sectors (MLM (Basic Materials) and LIN (Basic Materials) and CAT (Industrials) and APD (Basic Materials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

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.