APTARGROUP, INC.

This summary highlights information contained elsewhere in this proxy statement. This summary does not contain all of the information that you should consider, and you should read the entire proxy statement carefully before voting.

BOARD AND GOVERNANCE HIGHLIGHTS

LEADERSHIP SUCCESSION

On March 17, 2026, we announced that Gael Touya, a seasoned global executive with more than 30 years of experience at the Company, most recently as Aptar Pharma President, has been appointed President and Chief Executive Officer, effective September 1, 2026. He will succeed Stephan B. Tanda, who has served as President and Chief Executive Officer since 2017. Mr. Tanda will continue in his role as President and Chief Executive Officer until September 1, 2026, and thereafter will work closely with Mr. Touya and the Board as a strategic advisor through the end of the year. As part of this transition process, it is expected that the Board will appoint Mr. Touya as a director on September 1, 2026, and that Mr. Tanda will continue to serve as a member of the Board through December 31, 2026.

Our Nominees at a Glance

OUR EXECUTIVE COMPENSATION PHILOSOPHY AND OBJECTIVES

BUSINESS HIGHLIGHTS

In 2025, our total stockholder return over the past five years lagged behind the S&P 500 Index and the S&P Midcap 400, but was ahead of our peer group.

In 2025, we achieved the following financial and operational metrics.

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Forward-Looking StatementsThis proxy statement contains forward-looking statements made pursuant to the safe harbor provisions of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 (the “Exchange Act”) and are based on our beliefs as well as assumptions made by and information currently available to us. Words such as “expects,” “anticipates,” “believes,” “estimates,” “future,” “potential,” “are optimistic” and other similar expressions or future or conditional verbs such as “will,” “should,” “would” and “could” are intended to identify such forward-looking statements. Our actual results or other events may differ materially from those expressed or implied in such forward-looking statements due to known or unknown risks and uncertainties that exist in our operations and business environment. For additional information on these and other risks and uncertainties, please see our filings with the SEC, including the discussion under “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Form 10-K and Forms 10-Q. We undertake no obligation to update publicly any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.Website InformationThis proxy statement includes several website addresses and references to additional materials found on those websites. These websites and materials are provided for convenience only, and the content on the referenced websites is not incorporated by reference herein and does not constitute a part of this proxy statement.

Our Commitment to the Environment, Our Society, and Good Corporate Governance

THE ENVIRONMENT

Operations

OUR SUSTAINABILITY EFFORTS

Inclusion and Belonging

We aim to cultivate an open culture founded on fairness and a sense of belonging rooted in our core values of mutual trust and respect.

Supporting Our Communities

Our Charitable Foundation in the United States continues to recognize the importance of giving back to local communities. Through a Corporate Grant Program and an Employee Matching Gift Program, the Foundation supports eligible 501(c)(3) organizations in our communities with a focus on health and human services, higher education, and culture and the arts.

We also give back to communities outside the United States. We support the Vatsalya Foundation, which is a pioneer agency working with street children in Mumbai, India through its multilevel approach of outreach, child-to-child contact, contact centers and a shelter home. Our leadership team often visits the foundation and the children are often invited to visit our local offices for a day filled with fun activities such as a hand painting competition, traditional games and more.

Responsible Workplaces

A safe working environment for our employees is a top priority. That is why we implemented a global environmental, health and safety (“EHS”) management system. The Aptar EHS management system includes a digital platform to report incidents, conduct risk assessments as well as track corrective actions. Aptar’s EHS management system includes an Ergonomics program and Behavior Based Safety (BBS) program, which promotes a culture of caring through accountability to self and to the team. At year-end 2025, we continue to surpass world class levels for Total Recordable Incident Rate (TRIR). Our 2025 Lost Time Frequency Rate (LTFR) was above the world class level.

We are also a proud member of Sedex, one of the world’s leading ethical trade service providers, striving to improve working conditions in global supply chains. Sedex provides for a global platform to report on labor standards and health and safety practices in order to share that information with key stakeholders, including our customers. All of our manufacturing sites have completed site-level social assessments through the Sedex platform every year since 2020.