Is Koppers Holdings, Inc. overvalued or undervalued?

As of 17 October 2025, Koppers Holdings, Inc. has moved from fair to expensive in its valuation grade. The company appears to be overvalued based on its current metrics. Key ratios include a P/E ratio of 9, a Price to Book Value of 1.47, and an EV to EBITDA of 6.19. In comparison to peers, Koppers has a lower P/E ratio than Kronos Worldwide, Inc., which stands at 10.01, but is higher than Tronox Holdings Plc, which has a negative P/E ratio.
The recent stock performance indicates that Koppers has underperformed relative to the S&P 500, with a year-to-date return of -17.47% compared to the S&P 500's 13.30%. This trend reinforces the view that Koppers is currently overvalued in the market.