2021 Owens Corning Sustainability Report | Appendices | 289 INITIATIVE ADOPTION DATE WHERE APPLIED STAKEHOLDER DEVELOPMENT REQUIRED BY LAW/ VOLUNTARY UN Global Compact 2010 Companywide Multi-stakeholder approach to development Voluntary UN Environmental Programme 2010 Companywide Supplier Code of Conduct Voluntary Universal Declaration of Human Rights 2014 Companywide Supplier Code of Conduct Voluntary International Labour Organization 2010 Companywide Supplier Code of Conduct Voluntary Supplementary Convention of the Abolition of Slavery, the Slave Trade, and Institutions and Practices Similar to Slavery 2010 Companywide Supplier Code of Conduct Voluntary Protocol to Prevent, Suppress, and Punish Trafficking in Persons, Especially Women and Children, supplementing the United Nations Convention Against Transnational Organized Crime 2010 Companywide Supplier Code of Conduct Voluntary UN Sustainable Development Goals 2016 Companywide Multi-stakeholder approach to development Voluntary ISO 14000, ISO 50001, & ISO 45001/OHSAS 18001 Varies based on site All EMS systems are in alignment with ISO standards. Select sites worldwide are certified. Multi-stakeholder approach to development Voluntary ISO 9001 Varies by site Select sites worldwide are certified. Multi-stakeholder approach to development Voluntary Science Based Targets Initiative 2016 Companywide Multi-stakeholder approach to development Voluntary Science Based Targets Network 2020 Companywide Multi-stakeholder approach to development Voluntary CEO Action for Diversity & Inclusion 2019 Companywide Multi-stakeholder approach to development Voluntary Key External Initiatives Adopted by the Company

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