First Solar Inc (FSLR) is undervalued and we do not publish a verdict for Sunrun Inc (RUN).
We publish an intrinsic value for FSLR but not for RUN, so the two cannot be ranked on price.
Values as of the 22 Sept 2026 close.
A 12.5x revenue multiple, adjusted for growth and margin, values the shares at $645.98; the price of $200.78 is 69% below that value.
Leak Score 73/100 on 10 of 12 signals
Discounting its cash flows would put the shares at $51.76: 6 times the price of $8.79. A gap that size says more about a model than about the market. It usually means heavy debt, where a small error in the value of the business becomes a large one in the value of the shares, or a business our method does not describe. We do not publish a verdict on this one.
Leak Score 41/100 on 3 of 12 signals
| Metric | FSLR | RUN |
|---|---|---|
| Verdict | Undervalued | No reliable verdict |
| Price | $200.78 | $8.79 |
| Intrinsic value | $645.98 | — |
| Margin of safety | +69% | — |
| Leak Score | 73/100 (10/12) | 41/100 (3/12) |
| Market cap | $21.6B | $2.1B |
| Revenue growth, 5 years | 14.0% | 26.2% |
| Operating margin | 35.0% | 2.5% |
| Net margin | 32.5% | 11.7% |
| Return on equity | 18.5% | 12.6% |
| Debt to equity | 0.02 | 4.36 |
| P/E | 12.4x | 5.9x |
| Forward P/E | 8.6x | 20.4x |
| P/B | 2.1x | 0.6x |