MESSAGE FROM ABOUT SUSTAINABILITY AT PRODUCTS WITH ENVIRONMENTAL SOCIAL GOVERNANCE AND GRI, SASB, AND TCFD OUR CEO HUBBELL HUBBELL IMPACT STEWARDSHIP RESPONSIBILITY ACCOUNTABILITY DISCLOSURES GRI, SASB, AND TCFD DISCLOSURES We prepared this report leveraging the Global Reporting Initiative (GRI) Sustainability Reporting Standards, the Sustainability Accounting Standards Board (SASB) Electrical & Electronic Equipment Industry Standards, and the Task Force on Climate-related Financial Disclosures (TCFD) recommendations. 2023 GRI CONTENT INDEX GRI 1 FOUNDATION 2021 Statement of Use Hubbell Incorporated has reported in accordance with the GRI Standards for the period January 1, 2022 – December 31, 2022. GRI Used GRI 1: Foundation 2021 GRI STANDARD DISCLOSURE EXPLANATION GENERAL DISCLOSURES GRI 2: General 2-1 Organizational details Location of Hubbell Incorporated’s (NYSE: HUBB) headquarters: Shelton, Connecticut. Disclosures 2021 Our products are either sourced complete, manufactured, or assembled by subsidiaries in the United States (US), Canada, Puerto Rico, Mexico, China, the United Kingdom (UK), Brazil, Australia, Spain, and Ireland. The Company also participates in joint ventures in Hong Kong and the Philippines, and maintains o昀케ces in Singapore, Italy, China, India, Mexico, South Korea, Chile, and countries in the Middle East. 2-2  Entities included in the organization’s This report covers our environmental, social, and governance (ESG) e昀昀orts across our organization, spanning Hubbell Incorporated and sustainability reporting its subsidiaries, with a primary focus on our activities in the US. 2-3  Reporting period, frequency and Unless otherwise noted, this sustainability report, as well as Hubbell's annual 昀椀nancial reporting, covers calendar year 2022 (January 1, contact point 2022-December 31, 2022). Some initiatives or goals launched during early 2023 are also included in this report to provide up-to-date information for our stakeholders. We intend to publish our sustainability report on an annual basis. This report was published in March 2023. For questions related to Hubbell's sustainability report or other ESG disclosures, please email [email protected]. 2-4 Restatements of information In 2022, we completed our implementation of a software solution that enables us to track emissions, water, and waste across our enterprise. This led to an improvement in our data measurement methodology and the number of sites and sources included in our inventory. As a result, we restated our historical energy, emissions, and water metrics, as well as associated intensity 昀椀gures. 2-5 External assurance At this time, Hubbell's ESG disclosures are not externally assured. 2-6  Activities, value chain and other Hubbell Incorporated (est. 1888) is a world-class manufacturer of electrical and utility solutions. business relationships Hubbell’s reporting segments consist of Hubbell Utility Solutions (HUS) and Hubbell Electrical Solutions (HES). HUS o昀昀ers electrical distribution, transmission, substation, and telecommunications products. HUS supports the electrical distribution, electrical transmission, water, gas distribution, telecommunications, and solar and wind markets. HES provides wiring device products, connector and grounding solutions, controls, and other electrical equipment. HES products have applications in the light industrial, non-residential, wireless communications, transportation, data center, and heavy industrial markets. Optimized for quality, cost, and delivery, Hubbell's supply chain is made up of a globally diverse supply base. Our direct suppliers provide material inputs, such as steel, copper, and aluminum; catalog parts, which we assemble in our facilities; and tools for stamping, casting, and other activities. Our indirect suppliers a昀昀ord us services that support our o昀케ces and facilities, such as logistics solutions and professional services. In October 2021, Hubbell initiated the sale of its Commercial and Industrial Lighting business. The divestiture was completed in February 2022. In addition, Hubbell grew its business with acquisitions in the second half of 2022 - PCX Holdings LLC, Ripley Tools, and REF Automation. Please see our 2022 Annual Report and Proxy Statement 昀椀led with the US SEC for further details. Other than the stated divestiture and acquisitions, there were no signi昀椀cant changes regarding our size, structure, ownership, or supply chain in 2022. 62