Is MasTec, Inc. overvalued or undervalued?

As of 17 October 2025, the valuation grade for MasTec, Inc. has moved from fair to expensive, indicating that the company is overvalued. The key valuation ratios highlight this stance, with a P/E ratio of 60, a Price to Book Value of 5.55, and an EV to EBITDA of 37.88. In comparison to peers, APi Group Corp. has a P/E of 87.46, while TopBuild Corp. stands at a fair P/E of 24.98, further emphasizing MasTec's elevated valuation.
Despite its strong performance, with a year-to-date return of 48.27% compared to the S&P 500's 13.30%, the current valuation metrics suggest that MasTec, Inc. is not a compelling investment at its present price.