James Hardie Industries plc (JHX) is overvalued and Martin Marietta Materials Inc (MLM) is slightly overvalued.
Both trade above our estimate of their intrinsic value. MLM is the closer of the two: -13%, against -304% for JHX.
Values as of the 22 Sept 2026 close.
Discounting its cash flows at 11.1% (average of 3 methods) values the shares at $6.76; the price of $27.34 is 304% above that value, and 70% of that value comes from beyond year five.
Leak Score 0/100 on 3 of 12 signals
Discounting its cash flows at 9.7% (average of 3 methods) values the shares at $440.19; the price of $499.34 is 13% above that value, and 74% of that value comes from beyond year five.
Leak Score 57/100 on 10 of 12 signals
| Metric | JHX | MLM |
|---|---|---|
| Verdict | Overvalued | Slightly overvalued |
| Price | $27.34 | $499.34 |
| Intrinsic value | $6.76 | $440.19 |
| Margin of safety | -304% | -13% |
| Leak Score | 0/100 (3/12) | 57/100 (10/12) |
| Market cap | $15.9B | $35.5B |
| Revenue growth, 5 years | 10.7% | 5.4% |
| Operating margin | 13.7% | 21.3% |
| Net margin | 2.7% | 36.7% |
| Return on equity | 3.3% | 8.9% |
| Debt to equity | 0.69 | 0.55 |
| P/E | 110.1x | 12.3x |
| Forward P/E | 17.4x | 23.3x |
| P/B | 2.4x | 2.6x |
| Dividend yield | — | 0.7% |