Is UNITIL Corp. overvalued or undervalued?

As of 17 October 2025, the valuation grade for UNITIL Corp. has moved from very expensive to expensive, indicating a slight improvement in its perceived value. The company appears to be overvalued based on its current metrics, with a P/E ratio of 18, an EV to EBITDA of 9.60, and a Price to Book Value of 1.61. Comparatively, peers such as Portland General Electric Co. have a more attractive P/E of 15.68, while Black Hills Corp. shows a lower EV to EBITDA of 10.75, suggesting that UNITIL Corp. is not as competitively priced within its industry.
In terms of recent performance, UNITIL Corp. has underperformed against the S&P 500 over the year, with a return of -18.03% compared to the index's 14.08%. This trend reinforces the notion that the stock may be overvalued, especially when considering its long-term returns of 22.07% over five and ten years, which still lag behind the S&P 500's impressive 91.29% return over the same periods.