Graham Holdings Co (GHC) is undervalued and Otter Tail Corp (OTTR) is slightly undervalued.
Against our estimates of intrinsic value, GHC trades at the wider discount: a margin of safety of +28%, against +17% for OTTR.
Values as of the 22 Sept 2026 close.
Discounting its cash flows at 8.1% (average of 3 methods) values the shares at $1606.92; the price of $1150.03 is 28% below that value, and 79% of that value comes from beyond year five.
Leak Score 84/100 on 3 of 12 signals
Discounting its cash flows at 7.4% (average of 3 methods) values the shares at $108.73; the price of $90.23 is 17% below that value, and 82% of that value comes from beyond year five.
Leak Score 49/100 on 3 of 12 signals
| Metric | GHC | OTTR |
|---|---|---|
| Verdict | Undervalued | Slightly undervalued |
| Price | $1150.03 | $90.23 |
| Intrinsic value | $1606.92 | $108.73 |
| Margin of safety | +28% | +17% |
| Leak Score | 84/100 (3/12) | 49/100 (3/12) |
| Market cap | $4.9B | $3.8B |
| Revenue growth, 5 years | 11.2% | 7.9% |
| Operating margin | 5.8% | 24.6% |
| Net margin | 10.6% | 14.8% |
| Return on equity | 11.8% | 10.7% |
| Debt to equity | 0.28 | 0.67 |
| P/E | 9.3x | 19.5x |
| Forward P/E | — | 17.3x |
| P/B | 1.0x | 2.0x |
| Dividend yield | 0.7% | 2.5% |