2021 Owens Corning Sustainability Report | Overview | About Owens Corning | 9 Best Corporate Citizens List For an unprecedented third year in a row, Owens Corning was ranked number one on 3BL Media’s list of the 100 Best Corporate Citizens. The list, previously published by Corporate Responsibility Magazine, recognizes outstanding global ESG (environmental, social, and governance) performance among the 1,000 largest U.S.- based public companies. This is the seventh year Owens Corning has been named to the list. The companies are ranked based on a blend of performance and disclosure. CDP Owens Corning earned a place on the CDP A List for Water Security for the third year in a row. The company also scored an A- for CDP Climate Change in 2021, which represents the sixth consecutive year of earning a score at the Leadership Level. Formerly known as Carbon Disclosure Project, the U.K.-based CDP works with investors, companies, and policymakers to reduce GHG emissions and safeguard water resources and forests. By including Owens Corning on these lists, CDP recognizes us for our corporate sustainability leadership, through scoring that “measures comprehensiveness of disclosure, awareness, and management of environmental risks, and best practices associated with environmental leadership, such as setting ambitious and meaningful targets.” Responsible CEO of the Year from 3BL Media CEO Brian Chambers was named 2021 Responsible CEO of the Year for ESG Transparency. The award recognizes chief executives with proven records of bold and innovative leadership on environmental, social and governance (ESG) commitments. Computerworld’s 2021 Best Places to Work in IT In 2021, Owens Corning returned to the No. 1 spot on Computerworld’s ranking of the best places to work in information technology. The ranking is based on such factors as benefits, diversity, career development, training, retention, and the results of an employee survey. This is the eighth consecutive year that Owens Corning has appeared on this list. In 2020, Owens Corning ranked No. 2 on the list, and was No. 1 in 2019. Corporate Equality Index Owens Corning received a perfect score on the 2021 Corporate Equality Index, a key benchmarking survey that evaluates corporate policies and practices related to LGBTQ workplace equality. This marks the 17th consecutive year we have received 100% on this survey, established by the Human Rights Campaign Foundation. DiversityInc 2021 Companies for Diversity Owens Corning was named a 2021 Noteworthy Company by DiversityInc, an organization that annually ranks U.S. companies for diversity, equity, and inclusion, for the second consecutive year. The rankings measure performance based on six key areas of diversity and inclusion management: human capital diversity metrics, leadership accountability, talent programs, workplace practices, supplier diversity, and philanthropy. Dow Jones Sustainability Indices In 2021, for the 12th year in a row, Owens Corning earned placement in the Dow Jones Sustainability World Index in recognition of its sustainability initiatives. The DJSI World Index is an elite listing of the world’s largest companies based on long-term economic, environmental, and social criteria. Our score places us in the 100th percentile for the building products industry. In addition, we earned a perfect score for the criteria related to materiality, environmental reporting, and social reporting. The company is also on the DJSI North America list for the 4th consecutive year. EcoVadis Owens Corning earned a Platinum certificate with EcoVadis, a company that provides holistic sustainability ratings for businesses worldwide. The rating comes after analyzing our responses to an extensive questionnaire in comparison with over 65,000 other companies. Owens Corning was ranked among the top 1% of all companies rated by EcoVadis. CORPORATE AWARDS AND DISTINCTIONS Owens Corning continues to be a leader in corporate responsibility, and we are very proud of the recognition we receive along the way. It also provides inspiration for our people as we seek out new ways to build a more sustainable company. The following are some of the awards and distinctions we received throughout 2021. A LIST 2021 WA TER