Is AptarGroup, Inc. overvalued or undervalued?

As of 3 September 2025, AptarGroup, Inc. has moved from an attractive to a fair valuation grade. The company appears to be fairly valued based on its current metrics. The P/E ratio stands at 28, while the EV to EBITDA ratio is 15.02, and the PEG ratio is notably high at 3.61, indicating potential overvaluation compared to growth expectations.
In comparison to its peers, AptarGroup's P/E ratio of 24.45 is lower than that of Ball Corp. at 38.35 and higher than Owens Corning at 15.01, suggesting a mixed competitive position. Additionally, the EV to EBITDA ratio of 13.36 for AptarGroup is more favorable than Avery Dennison Corp.'s 17.16 but less favorable than Ball Corp.'s 22.84. Over the past year, AptarGroup's stock has underperformed the S&P 500, returning -12.13% compared to the index's 17.14%, reinforcing the notion that the stock may be fairly valued at this time.