AmSty - 2026 Sustainability Report: 06 Corporate Citizenship

Governance and Ethics

At AmSty, ethical behavior is a core value and expectation for every employee, from our Board of Directors to the CEO and on to front-line employees. We evaluate success not only by the results we accomplish, but also by how we achieve them. We strive to be trusted partners within AmSty, in the communities where we live and work, and on the global stage.

Governance begins with oversight from our owners, Chevron Phillips Chemical and Trinseo, who each seat three representatives on the Board of Directors. Ordinary affairs of the company are directed by our President and CEO along with other officers appointed by the Board. Certain significant decisions and actions require Board approval. Legal and Human Resources leaders oversee our ethics and compliance program, which involves ongoing training, employee acknowledgment of expectations, and several options for employees to report concerns of potential violations, including an anonymous ethics hotline.

We continually evaluate our processes for areas of potential improvement to reinforce our unwavering commitment to business excellence. A recent example is our purchasing function, where we implemented a more robust procurement policy with stronger controls and expectations for vendor selection, conflicts of interest, disposal of surplus assets, and competitive bidding. We believe in setting the bar high and will continue with thoughtful evaluations and deliberate adjustments to ensure high integrity governance across AmSty.

Product Stewardship

Safety is our number one priority. That begins with providing a safe environment for our employees, customers, and contractors, and extends to ensuring that the products we provide to our customers are safe, too. We are committed to the safe handling, transportation, and use of our products beyond compliance and regulatory requirements.

As part of our commitment to the American Chemistry Council (ACC) Responsible Care® program, our Product Stewardship program ensures the integrity of our products through their entire lifecycle beginning at inception through manufacturing, transportation, distribution, use, end-of-life, and recycling.

Product Safety Code requirements are met through our Operational Excellence Management System (OEMS) and Product Safety Management Standard. Multi-functional teams utilize these tools to ensure that environmental, health, and safety priorities are addressed. Based on the hazard and exposure risk profile of a product, appropriate measures are taken to ensure that product safety
is achieved.

We provide customers with safe handling, storage, release prevention, and transportation guidance, and our products are shipped with Safety Data Sheets utilizing the Globally Harmonized System (GHS) of Classification and Labeling of Chemicals. We also work continuously to improve our product stewardship program and collaborate regularly with suppliers, distributors, transportation providers, and customers to incorporate best practices into our approach.

Environment, Health, and Safety

Our commitment to protect people and the environment is foundational to our business and operations. We use a robust environmental, health, and safety (EH&S) approach to understand, classify, and mitigate risk and ensure compliance through training and audits. Our EH&S platform is embedded in our Operational Excellence Management System (OEMS) to ensure it is fully integrated into our operating protocols.

We are also vigilant to identify projects and technologies that can reduce EH&S risk. Examples include capital projects at Marietta, Ohio, to enable more stable peroxides in the polymerization of styrene to improve safety and reliability and transitioning all locations to firefighting foams that do not contain PFAS (Per- and Polyfluorinated Substances).

For the hazardous materials we handle, we follow rigorous process safety requirements that adhere to OSHA Process Safety Management (PSM) standards, and we implement exposure control programs to prevent impacts to workers. Our plants have received awards for their accomplishments from OSHA, Responsible Care®, and other industry associations.

We believe environment, health, and safety are so important that we look beyond our immediate facilities to share these core values and best practices with others in our supply chain. For example, we are members of an industry organization that reviews and audits waste disposal and recycling facilities to verify compliance with state and federal regulations and ensure that our downstream vendors share our commitment to EH&S stewardship.

Community Involvement

We believe it is our responsibility and honor to be active members of our communities and help improve the quality of life where our employees live and work, and we’re involved in many community initiatives.

We recognized a shared vision and formed a new partnership with Keep America Beautiful in 2023. We support Keep America Beautiful’s mission to provide the expertise, programs, and resources to help end littering, improve recycling, and beautify America’s communities. Our employees participate in Keep America Beautiful events and programs, and we help share sustainable practices everyone can adopt to protect the health of our communities.

Our employees also participate in other community activities, including neighborhood cleanups, natural landscape enhancement, and volunteering with local organizations, including the United Way, fire departments, and back-to-school donation programs.

We enjoy giving back to our communities. We will remain an active neighbor and ensure our priorities are employee-driven with philanthropic support from our company.

External Communications

At AmSty, we are committed to timely, accurate communications and are developing new ways to connect with customers, local communities, and the broader public.

We are proud to share the story of how we’re combining innovation and sustainability to build momentum toward a circular economy for plastic and a lower carbon future for society. That progress is possible through partnerships and people who are committed to making a difference. By participating in America’s Change Makers from the American Chemistry Council, we are helping consumers learn more about AmSty employees and others who are revolutionizing the way plastics are made. Since the initiative began in mid-2022, the videos in the America’s Change Makers series have been viewed more than 200 million times.

We publish timely updates about our sustainability advancements on LinkedIn and our leaders share perspectives on sustainable innovation on the blog “In the Loop”. Throughout the year, we also share updates via email with our external stakeholders.

We plan to continue sharing information on our progress and gathering important feedback from stakeholders. For example, we are bolstering support for our Community Advisory Panels near our facilities in St. James, Louisiana; Allyn’s Point, Connecticut; Hanging Rock, Ohio; and Joliet, Illinois. Through these Community Advisory Panels, we listen to residents, share information about what’s happening at our facilities, and gather important input about how AmSty can be a good neighbor.

Many of our employees also serve in key leadership positions in local, state, and national organizations to engage with the public, policymakers, and other stakeholders on important sustainability issues in the plastics and chemicals industry.