Is Koppers Holdings, Inc. overvalued or undervalued?

As of 22 August 2025, Koppers Holdings, Inc. has moved from an attractive to an expensive valuation grade, indicating it is currently overvalued. The company's P/E ratio stands at 9, while its EV to EBITDA ratio is 6.19 and the Price to Book Value is 1.47. In comparison, peers such as Kronos Worldwide, Inc. have a P/E of 10.01 and an EV to EBITDA of 7.10, suggesting that Koppers may not be as favorably positioned relative to its competitors.
Additionally, Koppers has underperformed against the S&P 500 over various timeframes, with a year-to-date return of -9.41% compared to the index's 12.22%. This trend continues with a one-year return of -20.40% versus the S&P 500's 17.14%, reinforcing the notion that the stock may be overvalued at its current price of 29.35.