MKS is pleased to share its 2025 Environmental, Social, Governance (ESG) Report. This report details our commitments, progress, and achievements towards integrating sustainability into our business with a view toward creating longterm value for our stakeholders.

Our innovative spirit, collaborative approach, and foundation of integrity and trust drive our commitment to sustainability. By focusing on solving our customers’ most complex technology challenges through cutting-edge technology and engineering, we develop products that meet customer needs while supporting the sustainability of our planet and the safety of our communities.

To this end, we continue to create sustainable solutions, such as our Modern cleaners, which significantly reduce energy use, chemical consumption, and wastewater generation in industrial cleaning processes, and our Compact Membrane Anode Closed-Loop System for alkaline zinc-nickel plating which reduces waste generation, decreases energy consumption by 32%, and helps lower the overall carbon footprint. Along with these improvements, I am pleased to highlight a few key 2024 ESG achievements:

• We remain committed to reducing our combined Scope 1 and 2 emissions by 42% by 2030, using 2022 as our baseline, in alignment with criteria established by the Science Based Targets initiative (SBTi). In 2024, informed by our Scope 3 screening analysis which determined the relevant Scope 3 categories for our business, we conducted our consolidated Scope 3 emissions inventory. We plan to submit our combined Scope 1, 2, and 3 targets to SBTi for validation in 2025.¹
• We conducted our fourth annual global Employee Engagement Survey, achieving a record 88% participation rate.
• We continued to receive external recognition for our sustainability efforts. In 2024, we received a “Low” ESG Risk Rating from Sustainalytics. We were also recognized on Newsweek and Statista’s annual list of America’s Most Responsible Companies, and for the last three consecutive years, as one of the Best Companies to Work For by U.S. News & World Report.

As a key provider of foundational solutions in the connected world, we acknowledge our significant responsibility to society. At MKS, we view this responsibility as an opportunity to develop revolutionary products that contribute meaningfully to both technological advancement and environmental sustainability. Looking ahead, we are optimistic about how our business can support global initiatives to mitigate and adapt to climate change and foster sustainable innovation. Thank you for joining us on this journey. Alongside our partners, customers, suppliers, and communities, we are excited about the opportunities ahead and look forward to building upon our progress toward a more sustainable future for all.

¹ See Appendix: Environmental Data for more details on our calculation of Scope 3 emissions.

John T.C. Lee
President & Chief Executive Officer

• Executive Team & MKS Fellows
• Board of Directors
• Guiding Principles
• Business Ethics

• Employee Development Opportunities
• Global Culture & Belonging

• Commitment to Sustainable Business Practices
• Supporting Positive Environmental and Social Progress
• Philanthropy & Volunteerism

• Ground-breaking Solutions to Complex Technology Challenges
• Suppliers