3M Company (MMM)

Conclusion

3M is a diversified industrial company with segments in safety and industrial products, transportation and electronics, and consumer goods. At 193.95 USD on 4 November 2026, the shares carry a market capitalisation of 100.0 billion USD.

The verdict is overvalued. The price sits above the fair value band of 80.38 to 120.57 USD, with a midpoint of 100.47 USD and a margin of safety of -48.2%. The discounted cash flow gives 58.12 USD per share, and the fair value from historical multiples is 142.82 USD. Today's multiples are above their own ten-year medians: price to earnings is 28.3 against 20.9, and price to free cash flow is 37.4 against 19.4. The reverse DCF implies growth of 17.1% a year, while revenue has fallen at a compound rate of 5.0% over five years and free cash flow per share at 25.6%.

The strongest numbers are return on invested capital of 25.6% against a WACC of 9.4%, net debt to EBITDA of 1.6x, and free cash flow conversion of 138.5% over five years. The weakest are the five-year revenue compound growth of -5.0%, the three-year EPS compound growth of -16.0%, and the price to book multiple of 24.2 against a median of 10.9.

Financial health

Financial health is green, held up by net debt to EBITDA of 1.6x, a current ratio of 1.41 and an Altman Z-score of 4.32, and held back only by interest coverage of 5.5x, which is rated neutral. The quick ratio is 0.78 and debt to equity is 3.63. The Altman Z-score sits in the safe zone, but that model was designed for manufacturers, and 3M is a conglomerate, so the reading should be taken with that in mind. Insolvency risk: low, about 2.5% by the estimate of the Ohlson model over one to two years, based on figures as of 31 December 2025.

Earnings quality

Earnings quality is green, supported by free cash flow conversion of 75.7% on a trailing basis and 138.5% over five years, and by a share count that fell at a compound rate of 1.5% over five years. The accrual ratio is 2.4%, and stock-based compensation is 0.35% of revenue, leaving free cash flow after it of 2.59 billion USD on a trailing basis. The Piotroski score is 5 out of 9. The Beneish M-score is not available. The company beat earnings expectations in all 8 recent quarters, with an average surprise of 6.0%. Estimate revisions are mixed: for the current year, four analysts raised and three lowered forecasts in the last 30 days, while the next-year EPS growth estimate is 8.5%.

Profitability

Profitability is green. The gross margin is 39.5% against a ten-year median of 47.3%, the operating margin is 18.8% against 21.5%, and the net margin is 14.0% against 16.5%. Margins have been stable, with a stability score of 0.95. The return on invested capital is 25.6% against a WACC of 9.4%, a ROIC minus WACC of 16.1%, and the five-year median ROIC is 20.4%. Return on equity of 85.7% overstates the business quality. The DuPont split shows a net margin of 13.0%, an asset turnover of 0.66 and an equity multiplier of 8.02, so leverage accounts for most of that figure.

Growth

Growth is red. Revenue has declined at compound rates of 10.0% over three years, 5.0% over five years and 1.9% over ten years. EPS has fallen at 16.0%, 8.4% and 2.3% over the same periods. Free cash flow per share has fallen faster, at 27.4% over three years and 25.6% over five. Revenue grew in only 5 of the last 10 years. The next-year EPS growth estimate of 8.5% is the only positive signal in this section, and it follows several years of decline.

Valuation

Valuation is red. Price to earnings is 28.3 against a ten-year median of 20.9, a premium of 35.6%. EV to EBITDA is 18.0 against 13.7, a premium of 31.6%. Price to free cash flow is 37.4 against 19.4, a premium of 92.7%, and price to book is 24.2 against 10.9, a premium of 122.6%. The DCF gives 58.12 USD per share at a discount rate of 10.2%, with 2.5% long-term growth. The fair value band of 80.38 to 120.57 USD rests on fixed assumptions, including a 5% equity risk premium and capped growth, so it is an order of magnitude, not a price target. The reverse DCF implies 17.1% annual growth. The dividend yield is 4.6%, the forward yield is 1.8%, and the payout on free cash flow is 171.7%, so the dividend is not covered by free cash flow.

Risks

The main risk is that the revenue and EPS declines continue, since the valuation depends on growth well above the five-year record of -5.0% for revenue and -8.4% for EPS. A dividend paid at 171.7% of free cash flow may need to be cut or funded from debt. Interest coverage of 5.5x leaves less room if earnings fall further, and an equity multiplier of 8.02 means a weaker margin would lower return on equity quickly. Values not available include the Beneish M-score. This analysis has no debt maturity schedule and no revenue split by segment, so it cannot show which businesses are driving the decline or when debt must be refinanced.