RS vs MSM vs GWW vs FAST

For growth investors, Fastenal Company (FAST) is the stronger pick with 8.

7% revenue growth year-over-year, versus -1. 3% for MSC Industrial Direct Co. , Inc. (MSM). Reliance Steel & Aluminum Co. (RS) offers the better valuation at 26. 4x trailing P/E (18. 9x forward), making it the more compelling value choice. Analysts rate Reliance Steel & Aluminum Co. (RS) a "Hold" — based on 27 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, Reliance Steel & Aluminum Co.

(RS) is the cheapest at 26. 4x versus Fastenal Company at 40. 7x. On forward P/E, Reliance Steel & Aluminum Co. is actually cheaper at 18. 9x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Reliance Steel & Aluminum Co. wins at 0. 96x versus Fastenal Company's 4. 62x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, W.

W. Grainger, Inc. (GWW) delivered a total return of +173. 2%, compared to +28. 7% for MSC Industrial Direct Co. , Inc. (MSM). Over 10 years, the gap is even starker: RS returned +463. 7% versus MSM's +87. 3%. 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), Fastenal Company (FAST) is the lower-risk stock at 0.

69β versus W. W. Grainger, Inc. 's 0. 89β — meaning GWW is approximately 28% more volatile than FAST relative to the S&P 500. On balance sheet safety, Fastenal Company (FAST) carries a lower debt/equity ratio of 11% versus 76% for W. W. Grainger, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Fastenal Company (FAST) is pulling ahead at 8.

7% versus -1. 3% for MSC Industrial Direct Co. , Inc. (MSM). On earnings-per-share growth, the picture is similar: Fastenal Company grew EPS 9. 0% year-over-year, compared to -22. 1% for MSC Industrial Direct Co. , Inc.. Over a 3-year CAGR, GWW leads at 5. 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.

Fastenal Company (FAST) is the more profitable company, earning 15.

3% net margin versus 5. 2% for Reliance Steel & Aluminum Co. — meaning it keeps 15. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: FAST leads at 20. 2% versus 7. 2% for RS. At the gross margin level — before operating expenses — FAST leads at 45. 0%, 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, Reliance Steel & Aluminum Co. (RS) is the more undervalued stock at a PEG of 0. 96x versus Fastenal Company's 4. 62x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Reliance Steel & Aluminum Co. (RS) trades at 18. 9x forward P/E versus 35. 9x for Fastenal Company — 16. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for FAST: 5. 0% to $46. 57.

All stocks in this comparison pay dividends.

MSC Industrial Direct Co. , Inc. (MSM) offers the highest yield at 3. 3%, versus 0. 8% for W. W. Grainger, Inc. (GWW).

For long-horizon retirement investors, Reliance Steel & Aluminum Co.

(RS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 75), 1. 3% yield, +463. 7% 10Y return). Both have compounded well over 10 years (RS: +463. 7%, MSM: +87. 3%), 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 (RS (Basic Materials) and MSM (Industrials) and GWW (Industrials) and FAST (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: RS is a mid-cap quality compounder stock; MSM is a small-cap income-oriented stock; GWW is a mid-cap quality compounder stock; FAST is a mid-cap quality compounder stock. 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.