海克罗夫特矿业 HYMC

On May 7, 2026, the Board of Directors of Hycroft Mining Holding Corporation appointed Diane R. Garrett as Executive Chairman of the Board. Diane R. Garrett, Ph.D. began serving as our President and Chief Executive Officer and a director on September 8, 2020, was Acting Chair of the Board from December 15, 2021, through April 8, 2022, and is a member of the Board. From June 2016 until her appointment with the Company, Ms. Garrett was the President and Chief Executive Officer of Nickel Creek Platinum Corp. (NCP), a mining exploration and development company listed on the Toronto Stock Exchange and the OTCQB Market. She has over 30 years of senior management and financial expertise in natural resources. Before joining NCP, she held the position of President and Chief Executive Officer and a director of Romarco Minerals Inc. (Romarco) from November 2002 until October 2015, taking the multi-million-ounce Haile Gold Mine project from discovery to construction. OceanaGold, Inc. acquired Romarco in 2015, at which time Ms. Garrett became a director and consultant to OceanaGold, Inc. before joining NCP in June 2016. Before that, she held numerous senior positions in public mining companies, including VP of Corporate Development at Dayton Mining Corporation and VP of Corporate Development at Beartooth Platinum Corporation. Early in her career, Ms. Garrett was the Senior Mining Analyst and Portfolio Manager in the precious metals sector with US Global Investors. Ms. Garrett received her Ph.D. in Engineering and Masters in Mineral Economics from the University of Texas at Austin. The Board determined Ms. Garrett should serve as a director due to her technical expertise and background as a senior executive in mining companies; her significant experience with permitting, developing, and constructing gold mines in addition to capital markets; as well as her success in moving a precious metals mining company from the development stage to the successful producer stage. Ms. Garrett served as a director of Novagold Resources Inc., a mineral exploration company operating in the gold mining industry (NYSE American: NG; TSE: NG), from May 2018 to June 2025, and as a director of Ausenco PYT Ltd., a privately held global engineering firm, from November 2020 to January 2025.

Stanton K. Rideout has served as our Executive Vice President and Chief Financial Officer since October 2020. He has over 30 years of senior executive experience in the mining and manufacturing industries, including Romarco and Phelps Dodge. From April 2018 until October 2020, Mr. Rideout was a consulting Chief Executive Officer of Carolina Gold Resources Inc. (CGR), a Canadian precious and base metals project-generator company. He joined the Board of CGR in June 2017 and became Chairman of the Board in July 2018. Before that, Mr. Rideout served as the Senior Vice President and Chief Financial Officer of Romarco from November 2010 through December 2015. After OceanaGold acquired Romarco in September 2015, he provided debt and equity consulting services for a number of mining companies. From January 2008 until May 2008, Mr. Rideout was Executive Vice President and Chief Financial Officer for Swift Transportation Corporation (Swift), a large North American truckload carrier. Prior to Swift, Mr. Rideout held various senior finance and accounting positions over 25 years with Phelps Dodge. Those roles included Vice President and Treasurer, Vice President and Controller, Investor Relations Officer, and Chief Financial Officer of Phelps Dodge International Corporation. Mr. Rideout earned his Master's in Business Administration from the University of Evansville and his Bachelor of Science, Business/Finance, from Western Kentucky University. Mr. Rideout is a Certified Public Accountant.

David B. Thomas has served as Senior Vice President, General Manager of the Company since April 2024. Mr. Thomas joined the Company as Director, Environmental, Social and Government in December 2020, and he became interim General Manager in December 2021 and Vice President, General Manager in December 2022. He has an extensive background in business finance, project development and management. Mr. Thomas began his career in the oil and gas service industry, followed by 13 years in the financial services industry and 17 years in the mining industry. Prior to joining the Company in 2020, Mr. Thomas was President and General Manager of Haile Gold Mine in South Carolina from its 2007 inception with Romarco Minerals until the merger with Oceana Gold in 2015, remaining as Vice President & Country Director and Advisor until 2021. Mr. Thomas has extensive expertise in environmental permitting and mitigation, regulatory affairs as well as government and stakeholder development.

On May, 7, 2026, Thomas S. Weng, the Company's former Chairman of the Board, was appointed as Lead Independent Director of the Board. Thomas S. Weng has been a member of our Board since May 29, 2020, and is a member of the Compensation Committee (Chair), the Audit Committee, and the Environmental, Social, and Governance Committee. Mr. Weng served as our Lead Independent Director from December 15, 2021, until his appointment as Chairman of the Board on January 15, 2025. Mr. Weng has more than 35 years of experience in the financial services sector and is a Co-Founding Partner with Alta Capital Partners, a provider of advisory and consulting services (since February 2011). From February 2007 to January 2011, Mr. Weng was a Managing Director at Deutsche Bank and Head of Equity Capital Markets for Metals and Mining throughout the Americas and across all industry segments for Latin America. Prior to 2007, he held various senior positions at Pacific Partners, an alternative investment firm, Morgan Stanley and Bear Stearns. Mr. Weng currently sits on the board of International Tower Hill Mines and Jaguar Mining Inc. Mr. Weng graduated from Boston University with a Bachelor of Arts in Economics.

David C. Naccarati has been a member of our Board since May 2021 and is a member of the Audit Committee, Environmental, Social, and Governance Committee (Chair), and the Safety and Technical Committee. Mr. Naccarati has more than 45 years of experience in the mining industry. He currently serves as an independent consultant to the mining industry. He was a founding partner of Cupric Canyon Capital, LLC, a private equity firm focused on acquiring and developing mining properties. He served as a member of its board of directors from 2010 to 2019. Mr. Naccarati was a senior management team member for Phelps Dodge Corporation (Phelps Dodge), a publicly traded mining and manufacturing company, from 2004 to 2007, including serving as president of the Phelps Dodge Mining Company, a division of Phelps Dodge. Mr. Naccarati also served as an adjunct professor in the Mining and Geological Engineering Department at the University of Arizona from 2009 to 2011. Mr. Naccarati received a degree in Mining Engineering from the University of Arizona and an MBA from the Sloan School of Management (MIT).

Sean D. Goodman has been a member of our Board since April 8, 2022, and serves on the Audit (Chair), Nominating and Governance, and Compensation Committees. Mr. Goodman is the Executive Vice President and Chief Financial Officer of AMC Entertainment Holdings, Inc. (NYSE: AMC) and has served in this position since February 2020. Prior to joining AMC, Mr. Goodman was Chief Financial Officer of Asbury Automotive Group, Inc. (NYSE: ABG) from July 2017 to November 2019 and the Chief Financial Officer of Unifi, Inc. (NYSE: UFI) from January 2016 to June 2017. Earlier in his career, Mr. Goodman served in various senior strategy and finance roles at The Home Depot, Inc. (NYSE: HD). Mr. Goodman began his career as an investment banker with Morgan Stanley (NYSE: MS) and in various consulting and public accounting positions with Deloitte LLP. Mr. Goodman has a Master of Business Administration degree from The Harvard Business School and a Bachelor of Business Science degree (with honors) from the University of Cape Town in South Africa. Mr. Goodman is a certified public accountant.

Michael J. Harrison has been a member of our Board since May 29, 2020, and is a member of the Safety and Technical Committee (Chair), the Nominating and Governance Committee and the Environmental, Social, and Governance Committee. Since January 2, 2020, Mr. Harrison has served as Managing Partner of Sprott Resource Streaming and Royalty and Managing Director of Sprott, Inc. Since January 2, 2020, Mr. Harrison has served as the CEO of Sprott Resource Streaming and Royalty Corp. From May 7, 2019, to June 23, 2020, Mr. Harrison served as Interim President and Chief Executive Officer of Sprott Resource Holdings Inc. (SRHI) and before such date served as a Managing Director in the mining and metals group of SRHI since February 2017. Before joining SRHI, he was president and CEO of Adriana Resources Inc. from October 2015 to February 2017 and Vice President, Corporate Development for Coeur Mining Inc. from February 2011 to August 2015. Since September 2025, Mr. Harrison has served on the Board of Premier American Uranium (TSXV: PUR, OTCQB: PAUIF). Mr. Harrison previously served on the Board of Directors of Corsa Coal Corp. (TSXV: CSO) from March 2011 to March 2017 and on the board of directors of Macusani Yellowcake (TSXV: PLU) from May 2011 to January 2013. Mr. Harrison also served as a member of the Board of Directors of Hycroft Mining Corporation (HMC), the Company's predecessor, from December 2017 until the May 29, 2020, recapitalization transaction with HMC. He also previously worked for Cormark Securities Inc. and National Bank Financial in the mining investment banking groups raising funds and providing mergers and acquisition advice to listed and private mining companies. Previously, Mr. Harrison worked internationally for BHP Exploration Division as a Project Geophysicist. Mr. Harrison holds a B.Sc.E (Honours) in Geophysics from Queen's University and an MBA (with Distinction) from the University of Western Ontario.

Josh Olmsted was appointed as an Independent Director with effect from 01st September 2026. Mr. Olmsted brings nearly 30 years of operational leadership experience from Freeport-McMoRan, most recently as Senior Advisor, Americas, following five years as President and Chief Operating Officer, Americas. In this role, Mr. Olmsted oversaw Freeport-McMoRan's copper mining operations across North and South America, as well as the Climax molybdenum business. Earlier in his career he led Freeport-McMoRan's copper operations and its Morenci Operations, one of the largest copper mines in North America. He currently serves as a director of Sociedad Minera Cerro Verde S.A.A. He holds a degree in Mine Engineering from the Colorado School of Mines.

Dr. Marcelo Godoy was appointed to the board as an Independent Director with effect from 01st September 2026. Mr. Godoy has spent more than 20 years in the mining industry and currently serves as Executive Vice President and Chief Technology Officer of AngloGold Ashanti plc, a role he has held since 2021. During his time at AngloGold Ashanti plc, Mr. Godoy has improved the company's operating performance, project delivery, and forecast reliability. Previously, he was Senior Vice President, Exploration at Newmont Corporation. Prior to Newmont Corporation, he was Mining Sector Leader for Golder Associates in South America, managing major feasibility studies and reserve compliance audits for some of the world's largest mining companies. He holds a Ph.D. in Strategic Mine Planning from The University of Queensland.

Richard O'Brien was appointed to the board as a Lead Independent Director with effect from 01st September 2026. Mr. O'Brien has more than 40 years of leadership experience across the mining and energy industries, including more than two decades in chief executive, chief financial, and chief operating officer positions. He served as President and Chief Executive Officer of Newmont Mining Corporation from 2007 to 2013, after serving as Chief Financial Officer from 2005 to 2007. From 2013 to 2015, he served as President and Chief Executive Officer of Boart Longyear Group Ltd., one of the world's leading providers of drilling services and equipment to the mining industry. He currently serves as a director on the boards of Vulcan Materials Co. and the Saudi Arabian Mining Co. Previously, he served on the board of Xcel Energy Inc., as Chair of New Gold Inc. from July 2024 until its acquisition by Coeur Mining Inc. earlier this year, and as Chair of Pretium Resources Inc. from 2019 until its acquisition by Newcrest Mining Ltd. in 2022. He received his Juris Doctor from Lewis and Clark College in Portland, Ore., and a bachelor's degree in economics from the University of Chicago.

On July 15, 2026, Hycroft Mining Holding Corporation announced that it has appointed Michael Deal as Senior Vice President and Chief Operating Officer, effective August 24, 2026. Most recently, from June 2021 to the present, Mr. Deal served as Vice President, Operations at First Majestic Silver, where he provided enterprise leadership across a portfolio of operating mines and development assets and served as Executive Lead for the integration of a $1 billion acquisition. He also directed annual capital programs exceeding $300 million while improving production, safety performance, and operating discipline. Mr. Deal previously held senior operating and technical leadership roles with Nevada Gold Mines, OceanaGold, Romarco Minerals, and Newmont Corporation, spanning open-pit and underground mining, heap leaching, milling, flotation, roasting, autoclave processing, and refractory ore treatment. Mr. Deal serves on the SME Foundation Board of Directors and has previously served on the Nevada Mining Association Board of Directors and the Nevada Mineral Processing Division Board. He is a Registered Member and Qualified Person (QP) with the Society for Mining, Metallurgy & Exploration (SME). Mr. Deal holds a Bachelor of Science degree in Chemical Engineering with a minor in Economics from the Colorado School of Mines and an MBA from Arizona State University.

On April 13, 2026, Hycroft Mining Holding Corporation appointed Eric Colby to the position of Executive Vice President, Corporate Development effective on April 16, 2026. Mr. Colby is an accomplished senior mining executive who brings a combination of operational leadership, capital markets expertise, and transaction experience. He has nearly two decades of experience across large-scale mine development, complex joint ventures, and operating businesses, and has executed more than 20 billion in public and private transactions. His background integrates corporate development, investor relations, and operations, providing a disciplined approach to capital allocation, project development and long-term value creation. Mr. Colby spent 15 years with Newmont Corporation, where he held roles of increasing responsibility across corporate development, investor relations, finance, and operations in South America. Most recently, from 2021 through 2025, he served as Vice President, Operations at Magris Performance Materials, where he was responsible for a diversified portfolio of mines and processing operations across the U.S. and Canada.