Is AptarGroup, Inc. overvalued or undervalued?

As of 17 October 2025, AptarGroup, Inc. has moved from expensive to attractive in its valuation grade. The company appears to be undervalued, especially when considering its P/E ratio of 28, which is lower than the peer average of approximately 24.45, and its EV to EBITDA ratio of 15.02, which is also competitive compared to peers like Ball Corp. with an EV to EBITDA of 22.84. Additionally, AptarGroup's PEG ratio of 3.61 suggests potential growth, though it is higher than some peers, indicating a premium for growth expectations.
In comparison to its peers, Crown Holdings, Inc. has a more favorable P/E ratio of 20.36 and an EV to EBITDA of 10.30, while Avery Dennison Corp. has a P/E of 28.96 and an EV to EBITDA of 17.16, reflecting a mixed competitive landscape. Despite recent underperformance, with a year-to-date return of -17.67% compared to the S&P 500's 13.30%, the long-term outlook remains positive, as evidenced by a 3-year return of 32.90%, although this still lags behind the S&P 500's 81.19%.