Is Natural Gas Services Group, Inc. overvalued or undervalued?

As of 17 October 2025, the valuation grade for Natural Gas Services Group, Inc. has moved from attractive to fair. Based on the current metrics, the company appears to be fairly valued. The P/E ratio stands at 18, while the EV to EBITDA ratio is 7.11, and the PEG ratio is notably low at 0.22, indicating potential undervaluation relative to growth prospects.
In comparison to peers, Graham Corp. has a significantly higher P/E ratio of 41.09 and an EV to EBITDA of 23.99, while Hyster-Yale Materials Handling, Inc. shows a lower P/E of 15.05 but is considered expensive. Despite the recent performance, Natural Gas Services Group, Inc. has outperformed the S&P 500 over the 1-year and 3-year periods, returning 27.65% and 153.68%, respectively, while the S&P 500 returned 14.08% and 81.19%.