Energy Transfer LP (ET) is undervalued and Williams Cos Inc (WMB) is overvalued.
Against our estimates of intrinsic value, ET trades at the wider discount: a margin of safety of +40%, against -182% for WMB.
Values as of the 22 Sept 2026 close.
Discounting its cash flows at 7.6% (average of 3 methods) values the shares at $34.14; the price of $20.40 is 40% below that value, and 81% of that value comes from beyond year five.
Leak Score 49/100 on 9 of 12 signals
Discounting its cash flows at 7.9% (average of 2 methods) values the shares at $25.17; the price of $70.98 is 182% above that value, and 80% of that value comes from beyond year five.
Leak Score 38/100 on 10 of 12 signals
| Metric | ET | WMB |
|---|---|---|
| Verdict | Undervalued | Overvalued |
| Price | $20.40 | $70.98 |
| Intrinsic value | $34.14 | $25.17 |
| Margin of safety | +40% | -182% |
| Leak Score | 49/100 (9/12) | 38/100 (10/12) |
| Market cap | $70.2B | $86.8B |
| Revenue growth, 5 years | 17.0% | 8.9% |
| Operating margin | 9.6% | 38.0% |
| Net margin | 4.7% | 24.9% |
| Return on equity | 15.1% | 24.0% |
| Debt to equity | 1.99 | 2.33 |
| P/E | 14.0x | 28.3x |
| Forward P/E | 12.1x | 27.6x |
| P/B | 2.2x | 6.6x |
| Dividend yield | 6.7% | 3.0% |