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Lloyd M. Yates is a Non-Independent Director and President and Chief Executive Officer of NiSource Inc., having served as a director since 2020 and as President and CEO since February 2022. Executive Experience: Mr. Yates has served as president and CEO of NiSource since February 2022. Mr. Yates retired in 2019 from Duke Energy, where he most recently served as executive vice president, customer and delivery operations, and president, Carolinas Region, since 2014. In this role, he was responsible for aligning customer-focused products and services to deliver a personalized end-to-end customer experience to position Duke Energy for long-term growth, as well as for the profit/loss, strategic direction and performance of Duke Energy's regulated utilities in North Carolina and South Carolina. Previously, he served as executive vice president of regulated utilities at Duke Energy, overseeing Duke Energy's utility operations in six states, federal government affairs, and environmental and energy policy at the state and federal levels, as well as executive vice president, customer operations, where he led the transmission, distribution, customer services, gas operations and grid modernization functions for millions of utility customers. He held various senior leadership roles at Progress Energy, Inc., prior to its merger with Duke Energy, from 2000 to 2012. Outside Board and Other Experience: Mr. Yates currently serves on the board of directors of Marsh & McLennan Companies. He previously served on the board of directors of American Water Works Company Inc. and Sonoco Products Company. Skills and Qualifications: Mr. Yates brings significant energy and regulated utility experience to our Board. He has over 40 years of experience in the energy industry, including in the areas of profit/loss management, customer service, nuclear and fossil generation and energy delivery. At Duke Energy, he used his operational experience to improve safety, reliability and the overall customer experience for millions of customers. He has expertise overseeing regulated utility operations, working with state regulators, and managing consumer and community affairs. He also has experience managing gas and grid modernization functions, which is valuable to our Board as we execute our business strategies. In addition, his experience as a director for other prominent public companies benefits our Board by bringing additional perspective to a variety of important areas of governance and strategic planning.

Michael S. Luhrs, Executive Vice President, Technology, Customer and Chief Commercial Officer of NiSource since March 2025; Executive Vice President, Strategy and Risk and Chief Commercial Officer of NiSource from March 2023 to February 2025; Senior Vice President at Alliant Energy from 2022 to March 2023; Vice President at Duke Energy Corporation from 2013 to 2022.

Mr. Shawn Anderson, Executive Vice President and Chief Financial Officer of NiSource since March 2023; Senior Vice President, Strategy and Chief Risk Officer from May 2022 to March 2023; Senior Vice President and Chief Strategy and Risk Officer from June 2020 to May 2022Vice President, Strategy and Chief Risk Officer from January 2019 to May 2020.

Ms. Melody Birmingham, Executive Vice President and Group President, Utilities of NiSource since March 2025; Executive Vice President and President, NiSource Utilities of NiSource from March 2023 to February 2025; Executive Vice President and Chief Innovation Officer of NiSource from July 2022 to March 2023; Senior Vice President and Chief Administrator Officer of Duke Energy Corporation from May 2021 to June 2022; Senior Vice President, Supply Chain and Chief Procurement Officer of Duke Energy Indiana from 2018 to April 2021.

Mr. William Jefferson, Executive Vice President, Chief Operating and Safety Officer of NiSource since May 2024; Executive Vice President, Operations and Chief Safety Officer of NiSource from July 2022 to May 2024; Station Director at STPNOC, Wadsworth, Texas, from 2020 to May 2022 and Vice President in 2022.

Kevin T. Kabat is the Chairman of the Board and an Independent Director of NiSource Inc., having served as a director since 2015. Executive Experience: From April 2007 to November 2015, Mr. Kabat was CEO of Fifth Third Bancorp, a bank holding company. He continued to serve as vice chair of the board of directors of Fifth Third Bancorp until his retirement in April 2016. Before becoming CEO, he served as Fifth Third Bancorp's president from June 2006 to September 2012 and as executive vice president from December 2003 to June 2006. Additionally, he was previously president and CEO of Fifth Third Bank (Michigan). Prior to that position, he was vice chair and president of Old Kent Bank, which was acquired by Fifth Third Bancorp in 2001. Outside Board and Other Experience: Mr. Kabat has been a director of Unum Group since 2008 and is currently chair of the board. Mr. Kabat has been a director of Crown Castle Inc. since August 1, 2023. He previously served as a chair of the board of AltiGlobal Inc. from January 2023 to August 2023. He also previously served as the lead independent director of E*TRADE Financial Corporation. He has also held leadership positions on the boards and committees of local business, educational, cultural and charitable organizations and campaigns. Skills and Qualifications: Mr. Kabat has significant leadership experience as a CEO in a regulated industry at a public company. As a result, he has a deep understanding of operating in a regulatory environment and balancing the interests of many stakeholders. His extensive experience in strategic planning, risk management, financial reporting, internal controls and capital markets makes him an asset to the Board, as he is able to provide unique strategic insight, financial expertise and risk management skills. In addition, he has broad corporate governance skills and perspective gained from his service in leadership positions on the boards of other publicly traded companies.

Michael E. Jesanis is an Independent Director of NiSource Inc., having served as a director since 2008. Executive Experience: Mr. Jesanis co-founded and was from 2013 to 2021 managing director of HotZero, LLC, a firm formed to develop hot water district energy systems in New England. Mr. Jesanis has served as an advisor to several startups in energy-related fields. From July 2004 through December 2006, Mr. Jesanis was president and CEO of National Grid USA, a natural gas and electric utility, and a subsidiary of National Grid plc, of which Mr. Jesanis was also an executive director. Prior to that position, Mr. Jesanis was chief operating officer (COO) and CFO of National Grid USA from January 2001 to July 2004 and CFO of its predecessor utility holding company from 1998 to 2000. Outside Board and Other Experience: Mr. Jesanis is a board member of El Paso Electric Company. He previously served as a director for several electric and energy companies, including Ameresco, Inc. Mr. Jesanis is the former chair of the board of a college and a past trustee (and past chair of the Audit Committee) of a university. Skills and Qualifications: By virtue of his former positions as president and CEO, COO and, prior thereto CFO, of a major electric and gas utility holding company as well as his role with an energy efficiency consulting firm, Mr. Jesanis has extensive experience with regulated utilities. He has strong financial acumen and extensive managerial experience, having led modernization efforts in the areas of operating infrastructure improvements, customer service enhancements and management team development. Mr. Jesanis also demonstrates a commitment to education as the former chair of the board of a college and a past trustee (and past chair of the Audit Committee) of a university. As a result of his former senior managerial roles and his non-profit board service, Mr. Jesanis also has expertise with board governance issues.

Peter A. Altabef is an Independent Director of NiSource Inc., having served as a director since 2017. Executive Experience: Mr. Altabef currently serves as chair of the board of Unisys Corporation, a global information technology company, a position he has held since April 2018. He previously served as CEO of Unisys Corporation from January 2015 to April 2025. Mr. Altabef also served as president from January 2015 through March 2020 and from November 2021 to May 2022. Prior to joining Unisys Corporation, he served as president and CEO of MICROS Systems, Inc., a provider of integrated software and hardware solutions to the hospitality and retail industries, from 2013 to 2014, when it was acquired by Oracle Corporation. Before that, he served as president and CEO of Perot Systems Corporation from 2004 to 2009, when it was acquired by Dell Inc. Following the acquisition, Mr. Altabef served as president of Dell Services, the information technology services and business process solutions unit of Dell Inc., until his departure in 2011. Outside Board and Other Experience: Mr. Altabef is chair of the board of directors of Unisys Corporation. He is also a member of the President's National Security Telecommunications Advisory Committee (NSTAC), a trustee of the Committee for Economic Development (CED), a member of the advisory board of Merit Energy Company, LLC and of the board of directors of Petrus Trust Company, LTA. He previously served as a senior advisor to 2M Companies, Inc., in 2012, and as a director of MICROS Systems, Perot Systems Corporation and Belo Corporation. He is also active in community service activities, having served on the boards and committees of several cultural, medical, educational and charitable organizations and events. Skills and Qualifications: Mr. Altabef has experience leading large organizations as CEO and a strong background in strategic planning, financial reporting, risk management, business operations and corporate governance. He also has more than 25 years of senior leadership experience at some of the world's leading information technology companies. As a result, he has a deep understanding of the cybersecurity issues facing businesses today. His overall leadership experience and his cybersecurity background provide the Board with valuable perspective and insight into significant issues that we face.

William D. Johnson is an Independent Director of NiSource Inc., having served as a director since 2022. Executive Experience: Mr. Johnson most recently served as president and chief executive officer of Pacific Gas & Electric Corporation, a utility company, from May 2019 through June 2020. Mr. Johnson also served as president and chief executive officer of Tennessee Valley Authority, an electric utility company, from January 2013 to May 2019. Prior to joining Tennessee Valley Authority, Mr. Johnson held the positions of chairman, president and CEO of Progress Energy, Inc. (Progress) from October 2007 to July 2012, and previously to that as president and chief operating officer from 2005 to 2007. His career at Progress included leadership roles of increasing responsibility including as president, energy delivery from 2004 to 2005, president and chief executive officer from 2002 to 2003, and executive vice president and general counsel from 2000 to 2002 of Progress Energy Service Company. Mr. Johnson's career began in 1992 at Carolina Power & Light Company (predecessor to Progress) where he held increasing senior management roles of associate general counsel and manager, legal department; vice president, senior counsel and corporate secretary and senior vice president and corporate secretary. Outside Board and Other Experience: Mr. Johnson has been a director of TC Energy Corp. since June 2021, where he currently serves on the Audit Committee and Human Resources Committee. Mr. Johnson has also been a director of Terrestrial Energy since 2023. Terrestrial Energy went public in November 2025. Mr. Johnson previously served on the boards of directors of the following utility industry groups or associations: Edison Electric Institute as Vice Chair, Nuclear Energy Institute as Chairman, Institute of Nuclear Power Operations, World Association of Nuclear Operators as Governor and Nuclear Electric Insurance Limited. Skills and Qualifications: Mr. Johnson brings three decades of industry and leadership expertise to the Board. Mr. Johnson's multiple tenures as CEO and vast experience with industry groups related to gas, electric, nuclear and other utilities provide him with extensive leadership skills in the utilities industry and a deep understanding of regulated industry operations. Mr. Johnson guided Pacific Gas & Electric Corporation through its emergence from bankruptcy and served as CEO of Progress during its merger with Duke Energy, through which he gained significant experience in complex corporate restructuring, transactions, and strategy. His experience has also informed an understanding of safety and risk oversight in the utilities industry that the Board values. This extensive experience and depth of knowledge gives Mr. Johnson a strong perspective on strategic operations within the industry and makes Mr. Johnson a valuable asset to the Board.

Deborah A. Henretta is an Independent Director of NiSource Inc., having served as a director since 2015. Executive Experience: Ms. Henretta currently is a partner at Council Advisors company, where she serves as Senior Advisor spearheading digital transformation practice for SSA & Company. She retired from Procter & Gamble (P&G) in 2015, where she served as group president of Global e-Business. Prior to her appointment as group president of Global e-Business, she held various senior positions throughout several P&G sectors, including as group president of Global Beauty from 2012 to 2015 and as group president of P&G Asia from 2007 to 2012. Prior to her appointment as group president of P&G Asia, she was president of P&G's business in ASEAN, Australia and India from 2005 to 2007. She joined P&G in 1985. Outside Board and Other Experience: Ms. Henretta has been a director at American Eagle Outfitters, Inc. since 2019, and a director at Meritage Homes since 2017. Ms. Henretta previously served as a director at Corning Incorporated from 2013 to 2025 and Staples, Inc. from June 2016 until September 2017. Additionally, she serves on the board of trustees for Syracuse University. Skills and Qualifications: Ms. Henretta has over 30 years of business leadership experience with P&G in a multi-jurisdictional regulatory and competitive business environment. She has experience across many markets, including profit and loss responsibility for multi-billion-dollar businesses at P&G and responsibility for strategic planning, sales, marketing, e-business, government relations and customer service. Ms. Henretta led a dynamic business segment and is, therefore, keenly aware of the delicate balance of keeping pace with customer expectations in a changing environment, as well as maximizing the benefits that inclusion and diversity can provide. Because of this experience, Ms. Henretta brings valuable insights to the Board and strategic leadership to us as we operate in multiple regulatory environments and develop products and customer service programs to meet our customer commitments. In her previous partner role at G100 Companies, she assisted in establishing a Board Excellence Program, which provides board director education.

Cassandra S. Lee is an Independent Director of NiSource Inc., having served as a director since 2022. Executive Experience: Ms. Lee is an experienced financial and operational leader with extensive knowledge of the telecommunication industry, currently serving as senior vice president and CFO for AT&T Inc. (AT&T) Mobility and Consumer Wireline Segments, a position she has held since 2024. Ms. Lee joined AT&T in 1993 and has served in various leadership capacities, including chief audit executive from 2021 to 2024 and senior vice president and chief financial officer, AT&T Network, Technology and Capital Management from 2018 to 2021. Outside Board and Other Experience: Ms. Lee currently serves on the board of directors of Andretti Acquisition Corp. II and on the board of trustees for the National Urban League. Ms. Lee previously served as a director of Andretti Acquisition Corp. Skills and Qualifications: In more than three decades with AT&T, Ms. Lee has acquired a wealth of expertise in various areas including retail operations, distribution strategy, global supply chain, mergers, acquisitions, and integration, capital management, network and other capacity planning, and shared services operations. Her vast and multifaceted experience in the telecommunication industry translates well in her service on the Board. Ms. Lee also has significant public company financial oversight and leadership experience that strengthens the Board's depth of financial acumen. Ms. Lee is a certified public accountant and veteran of the United States Army.

Theodore H. Bunting, Jr. is an Independent Director of NiSource Inc., having served as a director since 2018. Executive Experience: Mr. Bunting most recently served as group president, utility operations, at Entergy Corporation (Entergy), an integrated energy company, from 2012 until his retirement in 2017. Before that, he was senior vice president and chief accounting officer at Entergy from 2007 to 2012 and chief financial officer (CFO) of several subsidiaries from 2000 to 2007. He held other management positions of increasing responsibility in accounting and operations at Entergy since joining the company in 1983. Outside Board and Other Experience: Mr. Bunting has been a director of Unum Group since 2013 and is currently chair of its Audit Committee and a member of its Regulatory Compliance Committee. Mr. Bunting has been a director of the Hanover Group since 2020 and is a member of the Audit Committee. Mr. Bunting previously served as a director of Infrastructure and Energy Alternatives (IEA) from 2021 until October 2022 and as a member of the Nominating & Governance and Compensation Committees. He previously served as a director of Imation Corp., a global data storage and information security company. He also serves on the boards of Foundation for the Mid South and National Association of Black Accountants Inc. (NABA) and previously served on the board of Hendrix College. Skills and Qualifications: Mr. Bunting's utility industry knowledge, including his experience in customer service, safety and regulatory relations, are valuable to us as we continue to execute on our robust long-term utility infrastructure investment plans. He also brings additional public company experience in the areas of strategic finance, accounting, auditing, and capital and risk management to the Board. He is a certified public accountant.

Deborah A. P. Hersman is an Independent Director of NiSource Inc., having served as a director since 2019. Executive Experience: From November 2024 to December 2024, Ms. Hersman served as special assistant to Senator Thomas Carper. Ms. Hersman served as chief safety officer and advisor at Waymo LLC, the self-driving car technology subsidiary of Alphabet Inc., from January 2019 to December 2020. From 2014 to 2019, she served as president and CEO of the National Safety Council, a nonprofit organization focused on eliminating preventable deaths at work, in homes and communities, and on the road through leadership, research, education and advocacy. Outside Board and Other Experience: From 2004 to 2014, Ms. Hersman served as a board member and from 2009 to 2014 as chair of the National Transportation Safety Board (the NTSB). Previously she served in a professional staff role for the U.S. Senate Commerce, Science and Transportation Committee where she played key roles in crafting the Pipeline Safety Improvement Act of 2002 and legislation establishing a new modal administration focused on bus and truck safety. On June 29, 2023, she was appointed to the board of directors of One Gas Inc. and will become chair of the board in May 2026. In January 2026, she was appointed to the board of directors of Lyft, Inc. She previously served on the board of directors of Velodyne. Skills and Qualifications: Ms. Hersman is a seasoned executive, having previously served as the CEO of the National Safety Council and as the chair and chief executive at the NTSB. She has a successful track record running complex safety-focused organizations with numerous stakeholders. A widely respected safety leader driven by mission and a passion for preserving human life, Ms. Hersman also has expertise in the details of navigating crises and strong experience with safety policy legislation and advocacy. Ms. Hersman's extensive safety experience is of great value to the Board as we continue to implement our safety management system and meet our safety commitments to our employees, customers and stakeholders.

Gunnar J. Gode, Senior Vice President, Chief Accounting & Tax Officer of NiSource since August 2025, Vice President, Chief Accounting Officer and Controller of NiSource from July 2020 to July 2025.

Ms. Melanie B. Berman, Executive Vice President, Administration and Chief Human Resources Officer of NiSource since March 2025; Chief Human Resources Officer and Senior Vice President, Administration of NiSource from May 2024 to March 2025; Senior Vice President and Chief Human Resources Officer of NiSource from June 2021 to May 2024; Executive Vice President and Chief Human Resources Officer of The Michaels Companies, Inc. from 2020 to 2021.

Ms. Kimberly S. Cuccia, Executive Vice President, General Counsel and Corporate Secretary of NiSource since March 2025; Senior Vice President, General Counsel and Corporate Secretary of NiSource from April 2022 to February 2025; Vice President, Interim General Counsel and Corporate Secretary of NiSource from December 2021 to April 2022; Vice President and Deputy General Counsel, Regulatory, of NiSource Corporate Services Company, from January 2021 to December 2021. Vice President and General Counsel of Columbia Gas of Massachusetts and of NiSource Corporate Services Company, from 2019 to 2020.