AT&T INC.

CORPORATE RESPONSIBILITY INTEGRATION ACROSS AT&T OPERATIONS

The issues we manage under our Corporate Responsibility program represent risks, opportunities and important external impacts we consider in our strategy and operations. These pages detail how our integrated approach delivers long-term value for AT&T and positive social and environmental impact for our stakeholders.

Board and Executive Oversight

The AT&T Board of Directors Governance and Policy Committee (GPC) has direct oversight of Corporate Responsibility strategy, related policies, programs and reporting. It also oversees our policies for political and philanthropic giving, which include political contributions, corporate contributions approved by the AT&T Contributions Council and grants approved by the AT&T Foundation. In 2023, the GPC held six meetings.

Our Senior Vice President – Corporate Responsibility, who is also Chief Sustainability Officer (CSO), presents at the GPC and Board meetings and provides educational materials through a Corporate Responsibility Board portal. Materials and discussions cover Environmental, Social and Governance topics such as: digital divide; social innovation; responsible supply chain; business-affecting climate transition; public corporate responsibility reporting; and political and charitable contributions. The CSO also holds discussions with individual Committee members as needed throughout the year. The company’s Chief Diversity Officer presents updates to the GPC and provides workforce metrics for each GPC meeting.

Two other Board committees oversee specific corporate responsibility factors as part of their full charters, the Audit Committee and the Human Resources Committee. The Audit Committee oversees AT&T compliance with legal and regulatory requirements, as well as internal enterprise risk assessment activities, which include privacy and data security. The Human Resources Committee oversees human capital management at AT&T, including factors such as employee benefit plans, professional development and relevant executive compensation.

Our CSO oversees internal management of AT&T’s corporate responsibility strategy, risks and opportunities. Our SVP – Audit Services oversees

internal enterprise risk assessment activities and audit functions, including analysis of risks and disclosures, and associated processes, controls and assurance. Internally, our CSO leads our Corporate Responsibility (CR) Governance Council, which is comprised of more than a dozen Officers who lead the business operations aligned to our most important ESG focus areas. The CR Governance Council held three meetings in 2023 and covered ESG topics such as digital divide, business-affecting climate transition, political contributions, corporate responsibility reporting, Inclusion, long-range goal setting and social issue engagement.

In addition to the CR Governance Council, we convene core issue committees focused on the community, digital divide, disclosure, environment and human rights. These committees are led by senior leaders who work closely with subject matter experts throughout our business to implement and enhance programs and policies that address Corporate Responsibility issues across AT&T.

COMMITMENT TO SUSTAINABILITY

Corporate Responsibility Reporting

Each year, we engage hundreds of subject matter experts and business unit approvers across the Company to prepare, review, and continuously enhance our reporting and disclosures. Prior to publication, our annual Sustainability Summary data and content are reviewed by our CEO, the CR Governance Council and senior executives across the business. CR disclosures are further validated by our legal and finance organizations and select environmental calculations – such as energy use and greenhouse gas (GHG) emissions – are externally assured by an independent third party.

We seek to deliver a comprehensive reporting suite featuring consistent and comparable metrics. To do so, we align our reporting with several ESG frameworks. These include the Global Reporting Initiative standards, which we’ve aligned to since 2007, the Sustainability Accounting Standards Board standards, the Task Force on Climate-related Financial Disclosures recommendations, and the CDP Climate Change assessment. Our reporting also aligns with the United Nations Global Compact and Sustainable Development Goals.

In the U.S., the Company and our affiliated Employee PACs are committed to compliance with applicable laws and other requirements regarding contributions to political organizations, candidates for federal, state and local public office, ballot measure campaigns, PACs and trade associations.

Our biannual Political Engagement Report describes our political engagement priorities, how we participate in the political process and discloses our U.S. political contributions. With oversight from the Governance and Policy Committee and visibility of the full Board, every action we take is guided by our public Political Engagement Priorities and our Political Engagement Policy. Since 2019, AT&T has received the leading “Trendsetter” designation from the CPA-Zicklin Index of Corporate Political Disclosure and Accountability, for transparent reporting of our engagements. In 2023, AT&T received a 100% score for the third consecutive year.

100% SCORE

Third year in a row from the CPA-Zicklin Index of Corporate Political Disclosure and Accountability

Network and Data Security and Privacy

Network and data security and privacy are crucial to our mission of delivering connectivity services that businesses and consumers can trust. The Chief Security Office, led by our Chief Security Officer, establishes global policy and programmatic requirements designed to help protect the integrity, confidentiality and availability of our network. Our Chief Privacy Officer (CPO) is responsible for developing, implementing and supporting compliance with our privacy principles, policies and commitments – in accordance with international, federal and state legislation.

Our Transparency Report lists the number and types of legal demands that have compelled AT&T to provide information about the communications of our customers as well as information permitted by law to be disclosed about Foreign Intelligence Surveillance Act requests.

Supply Chain Management

A diverse, ethical and sustainable supply chain is crucial for mitigating risk, realizing new opportunities, delivering excellence and creating long-lasting value for AT&T and our stakeholders. We expect supplier business operations to be conducted in compliance with sustainability clauses in our contracts, which require conformance with the AT&T Principles of Conduct for Suppliers and the AT&T Human Rights Policy. Suppliers are required to verify adherence to our Principles of Conduct for Suppliers through a self-attestation process every 18-24 months. We screen potential suppliers prior to contract execution and monitor contracted suppliers to ensure we do not conduct business with entities that pose risks to our operations, brand or reputation.

COMMITMENT TO SUSTAINABILITY

We have an ongoing goal to lead our supply chain to improve its impacts by requesting sustainability data from suppliers representing 80% of our spend. In 2023, we reached 85% of our spend, exceeding our goal for the third consecutive year. In addition, through our participation alongside peer telecom

companies in the Joint Alliance for CSR, we engage suppliers at risk of noncompliance with certain ESG standards – such as child or forced labor, health and safety, freedom of association, non-discrimination, working hours, compensation, and business ethics – inon-site audits and corrective action plans.

ENVIRONMENTAL IMPACT

Understanding and mitigating climate change is fundamental to connecting our customers to greater possibility. AT&T is amplifying our positive environmental impact through enhancements in resource efficiency and optimizing the resilience of our business through efforts to protect our network and stakeholders from environmental risk.

i

48.7% REDUCTION

In Scope 1 and 2 GHG emissions, reaching 77% of our 2030 target*

$663M SAVINGS

In annualized energy cost due to energy efficiency projects*

188M METRIC TONS OF CO2e

Reduction in customer emissions, enabled by AT&T Smart Climate Solutions

*Data measured between 2015 and 2023

Mitigating Climate Change

We’ve established a goal to become carbon neutral, targeting net zero Scope 1 and 2 GHG emissions 1 by the end of 2035. To help measure our progress, we launched a science-based target to reduce emissions for these same categories 63% byyear-end 2030 (2015 baseline) – aligning with a 1.5°C pathway. Between 2015-2023, we reduced reported Scope 1 and 2 GHG emissions 48.7%, reaching 77% of our 2030 target.2

A key component of our emissions reduction strategy is enhancing operational efficiency. Between 2015-2023, we implemented nearly 161K energy efficiency projects – such as the ongoing integration of our centrally-managed Enterprise Building Management Solution across our footprint and decommissioning obsolete portions of our network operations – resulting in annualized energy cost savings of approximately $663 million.

We also continue to grow our procurement of renewable energy, where feasible. AT&T is currently #5 on the EPA Green Power Partnership list.

Climate-related Impacts

Extreme weather presents operational risks to AT&T’s network and safety risks to our employees, customers and communities. We’re taking steps to protect our network from threats and costly repairs associated with such events, while helping communities identify and address their own vulnerabilities. By modeling the potential for climate hazards within our operational footprint, our industry-leading Climate Change Analysis Tool (CCAT) helps network engineers analyze how inland and coastal flooding, drought, wind or wildfires may impact existing infrastructure or future network builds – up to 30 years into the future.

In collaboration with the Federal Emergency Management Agency and the U.S. Department of Energy’s Argonne National Laboratory, we launched the Climate Risk and Resilience Portal (ClimRR). ClimRR provides free and equitable access to leading climate datasets to support analysis and data-driven planning for future climate risks. The portal empowersnon-technical individuals, organizations, planners and decision-makers at state, local, tribal, and territorial

COMMITMENT TO SUSTAINABILITY

governments to gain awareness of future climate conditions to support community resilience.

Environmental Performance of our Supply Chain

AT&T’s supply chain contributes to our emissions footprint and presents unique climate-related risks and opportunities. To address this, we engage suppliers to reduce the environmental impact of their operations. In 2022, we met our Scope 3 science-based target 2 years ahead of schedule. In 2023, suppliers representing 55% of our spend – against our target goal of 50% – have set science-based Scope 1 and 2 targets. This goal covers AT&T spend including purchased goods and services, capital goods and downstream leased assets.

Supporting Customer Environmental Objectives

Beyond our commitments focused on our own operations, we have a goal to help business customers leverage our connectivity to help collectively reduce a gigaton (one billion metric tons) of GHG emissions by 2035. We’re helping these customers reduce their environmental footprint through adoption of AT&T Smart Climate Solutions – broadband-enabled technologies such as online collaboration tools and IoT solutions for fleet, asset and building energy management. As ofyear-end 2023, we’ve achieved 19% of our Gigaton goal and have enabled customers to reduce more than 188 million metric tons of CO2e. We measure our impact using a methodology developed in collaboration with Carbon Trust and BSR.

COMMUNITY IMPACT

At AT&T, we’re committed to connecting people to greater possibility. Our efforts to help bridge the digital divide, foster an inclusive environment, support the development of our employees and protect human rights are examples of how we help our employees, customers, suppliers, and communities thrive. Further, these social factors influence the near- and long-term success of our Company.

$2B INVESTED

To help bridge the digital divide, completing our 2021-2023 commitment.

34 CONNECTED

LEARNING CENTERS

Opened in traditionally underserved

neighborhoods

$132M

Invested to engage employees in 5.8 million hours of training and development

Digital Divide

Access to affordable and reliable internet service is critical for work, health, learning and commerce – and for staying digitally connected to family, friends, news and information. Leveraging our resources to address the digital divide is strategically important to AT&T. We’re investing in our networks and working with state and local governments to build out broadband networks to expand high-speed internet access to more people. This work helps drive social change while expanding our network reach and deepening valuable collaboration with communities, authorities and NGOs.

In 2023, we completed our commitment to invest $2 billion between 2021 and the end of 2023 to help bridge the digital divide. Our efforts have promoted broadband affordability, accessibility and safe adoption. We continue to offerlow-cost, high-speed internet service available for qualifyinglow-income households through our Access from AT&T program.

AT&T also participates in the FCC’s Affordable Connectivity Program (ACP) to help make wired and wireless services more affordable for millions of American households. When combined with Access from AT&T, eligible households can receive high-speed fixed internet service at no monthly charge. All households that quality for ACP are eligible for Access from AT&T.

Through our AT&T Connected Learning community program, byyear-end 2025, we seek to provide 1M people in need with digital resources and/or skills needed to succeed. Through the end of 2023, we opened 34 AT&T Connected Learning Centers in traditionally underserved neighborhoods facing barriers to connectivity, and we intend to increase this figure to more than 50 by the end of 2024. AT&T Connected Learning Centers provide access to high-speed internet and computing devices, as well as opportunities for tutoring and mentorship through our

COMMITMENT TO SUSTAINABILITY

employee-driven AT&T Believes volunteerism initiative.

Also part of AT&T Connected Learning, AT&T offers digital education resources. For instance, The Achievery SM is a free digital learning platform to support K-12 student learning and success everywhere today’s connected students learn. Together with the Public Library Association and other national partners, we’re offering a collection of digital literacy courses and workshops to help parents and caregivers build skills and confidence using technology and to help their child’s safe online learning. We have also invested $3 million to extend a Digital Navigator program and community-based IT help desk. This effort began in late 2022 and, as of the end of 2023, we have trained more than 150 community members to become digital navigators, providing service to more than 10,000 residents in Miami, St. Louis, Dallas, and Sacramento, Calif.

Inclusion

From our Board of Directors to front-line workers across the globe, we seek talented people who represent a mix of backgrounds, identities, viewpoints, abilities and experiences.

Our strategy for employee inclusivity is led by the AT&T Chief Diversity Officer, who also is a member of the CR Governance Council. To promote employee engagement and cross-functional cultural initiatives across our business, we regularly convene several inclusion councils, including a Senior Executive Inclusion Council made up of key officers and executives in the business. Data on the makeup of our global workforce is regularly provided to Board members and discussed in depth at least once a year with the Governance and Policy Committee and the full board.

All employees can join any of AT&T’s 26 Employee Groups, which are the vanguard of our efforts to advance our culture and encourage inclusivity across AT&T. Those principles extend into our hiring, career development, and employee experience strategies and practices.

AT&T continues to receive third party awards and accolades, such as Fair360 Top 50 Companies for Diversity, Human Rights Campaign Best Places to Work for LGBTQ+, Disability Equality Index Best Place to Work for Disability Inclusion and Bloomberg Gender Equality Index.

Employee Talent Development

As the global economy evolves, it’s crucial to train – and retain – a skilled and diverse workforce, and to help ensure our colleagues have the tools needed for continued success. Our internal training organization – AT&T Learning & Development – works across our business to deliver strategic leadership training, inspire continuous development for current and future roles, and energize our workforce to drive innovation. AT&T Learning & Development builds and enhances skills and capabilities in an evolving technological world, developing leaders who enhance the skills of others and role model critical competencies for the rest of the organization.

In 2023, AT&T invested approximately $132 million to engage employees in 5.8 million hours of training and development, plus $10.3 million in higher education tuition assistance.

Human Rights

Business success and ethical behavior gohand-in-hand, and protecting human rights is fundamental to our operations, supply chain and engagement with key stakeholders.

The AT&T Human Rights Policy details our commitment to upholding internationally recognized principles supporting rights to privacy, freedom of expression, fair labor practices, ethical use of artificial intelligence and protection from harmful online content – particularly for children.

For more information on our sustainability program and policies, please visit: http://sustainability.att.com.

AUDIT COMMITTEE