Eos Energy EOSE

Mr. Mastrangelo has served as a director and the Chief Executive Officer since the closing of the Company's business combination with B. Riley Principal Merger Corp. II in 2020. He joined EES LLC as a Board advisor in March 2018 and assumed the role of Chief Executive Officer from August 2019 until the closing of the business combination. Before coming to Eos, Mr. Mastrangelo was President and Chief Executive Officer of General Electric's Gas Power Systems since September 2015. As an energy industry leader for the past two decades, Mr. Mastrangelo has extensive experience leading diverse teams to develop and deploy commercial scale projects around the world. Mr. Mastrangelo has broad operating experience across the energy value chain including serving as Chief Executive Officer of GE's Power Conversion business, applying science and systems of power conversion to increase the efficiency of the world's energy infrastructure. Mr. Mastrangelo spent ten years with GE Oil & Gas, in leadership roles in finance, quality, and commercial operations, culminating in being named a GE Corporate Officer in 2008. Mr. Mastrangelo began his career with GE in the company's Financial Management Program and then joined GE's Corporate Audit Staff. Originally from New York, Mr. Mastrangelo earned a Bachelor of Science in Finance from Clarkson University and an Associate of Science, Business Administration and Management from Westchester Community College.

Ms. Buczkowski joined Eos in October 2024 and currently serves as Chief Administration Officer bringing nearly 20 years of experience in talent acquisition and development, workforce transformation, and organizational culture and communications. Prior to joining Eos, Michelle served as Managing Director, Human Resources at Duquesne Light Company from September 2021 through October 2024. Before her position at Duquesne Light Company, Michelle worked at PNC Bank where she held multiple positions including Vice President, Sr. Talent Manager from 2016 to 2020 and Vice President, Sr. Strategy and Planning Manager - Retail National Expansion from 2019 to 2021. Prior to her time at PNC Bank, Michelle held the position of Manager - Talent Strategies at Consol Energy. Michelle graduated with a Bachelor's Degree from the University of Pittsburgh in Communication Studies/Business Management. Michelle currently serves on the board of United States Collegiate Athletic Association. Effective August 24, 2026, Michelle Buczkowski, the Company's Chief Administration Officer, was appointed Chief Commercial Officer.

Mr. Bornstein has served as a member of our Board since 2022. Mr. Bornstein is the founder, principal and co-managing partner of Whipstick Ventures LLC, an investment company focused on early-stage companies with novel solutions across energy storage and efficiency, services, biotech, and fin-tech. He also serves as the managing partner of Generation Capital Partners. Prior to founding Whipstick Ventures in 2018, Mr. Bornstein held senior leadership roles at General Electric (GE) (NYSE: GE), including Vice Chairman and Chief Financial Officer from 2013 to 2017. He began his career at GE in 1989 through the GE Power Systems' Financial Management Program and served in a variety of finance leadership roles, including 12 years as Senior Vice President and Chief Financial Officer of GE Capital. Mr. Bornstein earned a Bachelor of Science from Northeastern University and currently serves as trustee of the university. He currently serves on the board of directors of AlloVir, Inc. (NASDAQ: ALVR), where he chairs the Audit Committee. He also serves on the board of Build On and is actively involved in several youth development programs.

Mr. Nigro has served as a member of our Board since March 25, 2025 and our Board Chair since January 1, 2026. From October 2022 to March 2023, Mr. Nigro served as an advisor to Exelon Corp.'s (Exelon) (NASDAQ: EXC) Chief Executive Officer, following his tenure as Exelon's Chief Financial Officer from May 2018 to October 2022. Prior to that, Mr. Nigro served as Chief Executive Officer of Constellation Energy Corp. (Constellation), an Exelon operating division, from 2013 to 2018, and previously as Senior Vice President, Portfolio Strategy. Before joining Constellation, he served as Senior Vice President, Portfolio Management and Strategy, for the Exelon Power Team. Earlier in his career, Mr. Nigro held a range of leadership and commercial roles, including Vice President, Structuring and Portfolio Management; Director, Commercial Transactions; Manager, Northeast Region; Integration Lead - Power Team/Sithe New England Holdings; manager, financial trading - hedge book; and financial transaction. He also spent seven years at Phibro Energy, Inc., an independent oil trading and refining company. Mr. Nigro earned a Bachelor of Arts from the University of Connecticut and completed executive education programs at Northwestern University's Kellogg School of Management, the University of Chicago, and the MIT Reactor Technology Course for Utility Executives. He currently serves on the board of directors of Talen Energy Corp. (NASDAQ: TLN), where he chairs the Risk Management Committee and is a member of the Governance Committee. He is a senior advisor to Blackstone Inc.'s (NYSE: BX) energy transition group and has served on the board of directors of Kindle Energy LLC (a Blackstone company) since July 2023. Mr. Nigro previously served on Exelon's Executive Committee, chaired its Corporate Investment Committee, and served on the boards of the National Aquarium in Baltimore and the Chicago Public Library Foundation.

Mr. Dimitrief has served as a member of our Board since 2020. He is currently Global Chief of Ronald McDonald House, a partner at Zeughauser Group and an Advisory Partner at Earlylands Advisory. He previously served as Senior Vice President and General Counsel of Sotera Health Co. (NASDAQ: SHC) from November 2022 - March 2026, President and Chief Executive Officer of General Electric's (GE) Global Growth Organization from 2015 to 2018 and as GE's General Counsel from 2015 - 2018. Mr. Dimitrief joined GE in 2007 after spending 20 years as a litigator at Kirkland & Ellis LLP. He earned a Bachelor of Arts from Yale College and a Juris Doctor from Harvard Law School and has taught courses on corporate citizenship and corporate law at Harvard Law School and New York Law School. Mr. Dimitrief previously served as a director of both public and non-public companies, including The We Company, Synchrony Financial (NYSE: SYF), SmileDirectClub (NASDAQ: SD), and GE Capital Bank.

Ms. Walters has served as a member of our Board since 2020. Ms. Walters currently serves as Chief Commercial Officer for Leading Edge Power Solutions, LLC. From 2015 to 2019, she served as a Member of the U.S. House of Representatives for California's 45th District, where she worked on key legislation, business and policy initiatives related to energy, technology, environmental and healthcare. During her tenure, she served in House leadership and was a member of the Energy and Commerce Committee, including its Communications and Technology, Digital Commerce and Consumer Protection, and Oversight and Investigations subcommittees. Prior to serving in Congress, Ms. Walters was a member of the California State Senate from 2008 to 2014, where she served on the Banking and Financial Institutions Committee and as Vice Chair of the Appropriations Committee. She previously served in the California State Assembly and was Mayor and Councilmember for the City of Laguna Niguel. Prior to her career in public service, Ms. Walters was an investment professional at Drexel Burnham Lambert and Kidder, Peabody & Co. She earned a Bachelor of Arts from the University of California, Los Angeles. Ms. Walters currently serves on the board of directors of BRC Holdings, Inc. (NASDAQ: RILY), Pacific Specialty Insurance Company, Soaring, and Apollo Pact, a non-profit 501(c)(3).

Mr. Demby has been a member of our Board since 2021. From 2018 to 2022, Mr. Demby served as President of Cree LED, a lighting and industrial innovation company. Prior to that, he was responsible for Mergers and Acquisitions at Cree, Inc. (Cree) and served as the Senior Vice President and General Manager of Cree's Semiconductor Materials Business. Before joining Cree, Mr. Demby served as Chief Executive Officer and Director of Noel Group, an industrial holding company overseeing five global manufacturing businesses. Earlier in his career, he served as President and Chief Operating Officer of L&L Products, Inc., a global automotive and aerospace OEM focused on solutions for noise and vibration reduction while enhancing structural integrity. Mr. Demby's career began in engineering roles at Proctor and Gamble and GE. Mr. Demby earned a Bachelor of Science from the University of Delaware and an MBA from Rensselaer Polytechnic Institute. He currently serves as director of the Brown Capital Management Mutual Fund Trust, where he chairs the Nominating and Governance Committee, and served on the board of Piedmont Lithium Incorporated (NASDAQ: PLL), a clean energy company, where he chaired Leadership and Compensation Committee and the Nominating and Governance Committee during his six-year tenure. He Previously served as a Director of the Federal Reserve Bank of Richmond's Charlotte branch including a period as Chairman from 2012 to 2017. Mr. Demby also served on the board of directors of the Raleigh Chamber of Commerce, including Chair-Elect and advisor, and is a founder and leader of Valour Academy Schools, Inc. in Raleigh, North Carolina.

Mr. Urban has served as a member of our Board since 2024. Mr. Urban currently serves as Managing Director at BGR Group, a bipartisan lobbying and public relations firm, and as Of Counsel at Torridon Law PLLC. He is also a Senior Political Commentator on CNN. From 2020 to 2022, Mr. Urban served as Executive Vice President of North American Corporate Affairs for ByteDance Ltd., the parent company of TikTok. Prior to that, Mr. Urban served as President of the American Continental Group, a leading bi-partisan government affairs and strategic consulting firm. He also served as an artillery officer in the U.S. Army's 101st Airborne Division. Mr. Urban earned a Bachelor of Science from the United States Military Academy at West Point, a Master of Government Administration from the University of Pennsylvania, and a Juris Doctor from the Temple University School of Law. He currently serves on the board directors of Virtu Financial Inc. (NYSE: VIRT), SAIC (NASDAQ: SAIC), SubCom Inc., the Johnny Mac Soldiers Fund, Edward M. Kennedy Institute for the US Senate, and the International Republican Institute as well as on the advisory boards for Coinbase Global, Inc., Voyager Space, and REGENT Craft Inc.

Mr. McNeil has served as a member of our Board since 2023. Mr. McNeil served as Executive Vice President - Advisor at Enphase Energy Inc. (NASDAQ: ENPH) from April 2023 to July 2025, Chief Operations Officer from 2019 to 2023, and Vice President of Quality and Customer Support from 2018 to 2019. Prior to that, he served as Senior Vice President of Operations at Energous Corp. (NASDAQ: WATT) from 2016 to 2018 and held key positions at Cypress Semiconductor Corp. from 1994 to 2012, including Senior Vice President of Worldwide Operations and Vice President of Planning. Mr. McNeil earned a Bachelor of Science from San Jose University. He previously served on the board of directors of Upstart Power from 2021 to 2024 and has served on the boards of Heraeus, Digital Equipment Corp. (later acquired by Hewlett Packard Enterprise), Seagate Technology Holdings PLC (NASDAQ: STX), and Memorex.

On July 9, 2026, the Board appointed Haiyan Song, age 60, to the Board. Ms. Song will serve as a Class III director, and shall hold office until the Company's 2029 annual meeting, or until her successor is elected and qualified. Song brings more than three decades of leadership experience across software, cloud, cybersecurity, data, and enterprise technology businesses. Most recently, Song served as Executive Vice President of NetApp's CloudOps business and previously held senior leadership positions at F5, Splunk, and Hewlett Packard Enterprise. Throughout a distinguished career, Song has led product, engineering, cloud, cybersecurity, and go-to-market functions at a global scale. In addition, Song contributes valuable public and private board experience through service on the boards of CSG and Kodiak Solutions. Song's deep expertise in software, data, cybersecurity, and edge computing supports organizations in advancing intelligent, data-driven technologies and strengthening innovation, operational excellence, and growth strategies.

Marie Batz Martin is an accomplished legal, compliance, and corporate governance executive with more than 20 years of experience advising global industrial and manufacturing organizations. Prior to joining Eos Energy Enterprises as Chief Legal Officer, Martin served as Global Vice President and Chief Compliance Officer at Coherent Corp., where she led global compliance programs and business integration efforts across a multi-billion-dollar enterprise. Previously, Martin held the positions of Executive Vice President, General Counsel, Corporate Secretary, and Chief Compliance Officer at FlightSafety International, overseeing legal, regulatory, governance, and compliance functions. Earlier in her career, she spent more than a decade with Alcoa and Arconic, advising executive leadership on strategic transactions, regulatory matters, corporate governance, and large-scale manufacturing initiatives. Martin is recognized for building high-performing teams and guiding complex multinational organizations through periods of growth, transformation, and operational change. Her extensive experience in legal leadership, compliance, governance, strategic transactions, and public-company matters makes her well positioned to support Eos' next phase of growth and execution.

Mr. Alessandro Lagi was appointed as the Chief Financial Officer with effect from June 08, 2026. Mr. Lagi, 50, served in various roles at Johnson Controls from 2022 to 2026, most recently as Global FP&A and Vector of Growth Finance Vice President at Johnson Controls and previously served as CFO and Finance VP of APAC (Asia Pacific) and of EMEALA (Europe, Middle East, Africa and Latin America). Prior to that, from 2019 to 2022 Mr. Lagi worked at Baker Hughes in roles of increasing responsibility, most recently serving as Oil Field Equipment Global CFO and Finance VP and from 2016 to 2019 Mr. Lagi served as Latin America CFO for BHGE. Mr. Lagi holds a Laurea Degree in Management and Finance with a major in Business Management at the University of Economics of Florence.

Mr. Robinson has served as a member of our Board since 2024. Mr. Robinson joined Cerberus Capital Management in 2011, and his team invests in businesses driving next-generation technologies and capabilities that advance supply chain integrity. In his role, he leads investments across several industries and technologies. Mr. Robinson previously served as the Co-Chief Investment Officer of Cerberus Telecom Acquisition Corporation until the completion of its business combination with KORE Wireless in 2021. Prior to that, he served as Cerberus' Head Trader. Mr. Robinson has led public and private deals within the areas of next generation communications, critical minerals, and grid security. He currently sits on the board of Torngat Metals, a private rare earths development company. Prior to joining Cerberus, Mr. Robinson was an Executive Director and credit trader on the high-yield and distressed desk at Morgan Stanley. He started his career in 2004 as a Credit Analyst in Goldman Sachs' Leveraged Loan Group. Mr. Robinson graduated from Acadia University in Nova Scotia, Canada.

On August 25, 2023, the Board of Directors of the Company appointed Sumeet Puri to serve as the Company's Chief Accounting Officer, effective September 5, 2023. Mr. Puri has 23 years of experience in various financial leadership roles at manufacturing, distribution and financial services organizations. Prior to Eos, Mr. Puri most recently served as global controller and principal accounting officer for Caterpillar Financial Services Corporation, a provider of retail and wholesale financing solutions and extended protection products to Caterpillar customers and dealers for the complete line of Caterpillar products. There, Mr. Puri was responsible for controllership, planning and budgeting and SEC reporting functions. From August 2019 to August 2021, Mr. Puri served as assistant corporate controller of W.W. Grainger, Inc. (NYSE: GWW), an industrial supply company. Previously, Mr. Puri served as global controller of General Electric Company's global operations division between September 2013 and July 2018. Mr. Puri originally joined GE Capital in 2000, holding various leadership positions with progressive responsibilities within the finance functions.