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Michael E. Castagna, Pharm.D. has served as our Chief Executive Officer and as one of our directors since May 2017. Mr. Castagna also served as a Corporate Vice President, Chief Commercial Officer from March 2016 until May 2017. From November 2012 until he joined us, Mr. Castagna was at Amgen, Inc., where he initially served as Vice President, Global Lifecycle Management and was most recently Vice President, Global Commercial Lead for Amgen's Biosimilar Business Unit. From 2010 to 2012, he was Executive Director, Immunology, at Bristol-Myers Squibb Company (BMS). Before BMS, Mr. Castagna served as Vice President and Head, Biopharmaceuticals, North America, at Sandoz, a division of Novartis. Beginning in 1997, he held positions with commercial or medical affairs responsibilities at EMD (Merck) Serono, Pharmasset and DuPont Pharmaceuticals. He received his pharmacy degree from the University of the Sciences-Philadelphia College of Pharmacy, a Pharm.D. from Massachusetts College of Pharmacy & Sciences and an MBA from The Wharton School of Business at the University of Pennsylvania.

Dominic Marasco, R.Ph., has been our President, Endocrine Business Unit since January 2025. Prior to joining us, Mr. Marasco held the position of Executive President, Chief Commercial Officer for Envision Pharma Group from February 2023 until August 2024, leading its technology and artificial intelligence business units and all commercial operations. Before joining Envision Pharma, Mr. Marasco was Chief Commercial Officer at BioAgilytix Labs, Inc. from December 2019 until December 2022. Prior to BioAgilytix, he was EVP, Global Business Development, Commercial Group at Syneos Health from February 2018 until December 2019, after serving in progressive leadership roles at Amgen, Inc. including Head of U.S. Sales for the Neuroscience Business Unit and before that Global Commercial Head, Amgen Biosimilars. Mr. Marasco also held successful commercial leadership roles at Sandoz Biopharmaceuticals, a Novartis Company, and Quintiles Transnational Holdings Inc (now IQVIA). He began his career as a pharmacist before joining Eli Lilly and Company in a sales capacity. Mr. Marasco has a Bachelor of Science degree from the Philadelphia College of Pharmacy and completed Harvard Business School's Advanced Management Program.

David B. Thomson, Ph.D., J.D. has been our General Counsel and Corporate Secretary since January 2002. Prior to joining us, he practiced corporate/commercial and securities law at a major Toronto law firm. Earlier in his career, Dr. Thomson was a post-doctoral fellow at the Rockefeller University. Dr. Thomson obtained his B.S., M Sc. and Ph.D. degrees from Queens University and obtained his J.D. degree from the University of Toronto.

Stuart A. Tross, Ph.D. has been our Executive Vice President, Human Resources since December 2016, with responsibilities for human resources, information technology, corporate communications and west coast facilities. From 2006 to 2016 he served in various roles of increasing responsibility at Amgen, Inc., most recently as Senior Vice President and Chief Human Resources Officer responsible for human resources and security on a global basis. From 1998 to 2006 he served in a series of leadership roles at BMS, most recently as Vice President and Global Head of Human Resources for Mead Johnson Company. Mr. Tross received a B.S. degree from Cornell University and M.Sc. and Ph.D. degrees in Industrial-Organizational Psychology from the Georgia Institute of Technology.

Christopher B. Prentiss has been our Chief Financial Officer since April 2024. From September 2022 until March 2024, Mr. Prentiss served as Chief Financial Officer of ADARx Pharmaceuticals, Inc., a privately held clinical-stage biotechnology company. Between April 2015 and November 2021, he held a series of finance positions of increasing responsibility at the commercial-stage biotech company Adamas Pharmaceuticals, Inc. (Adamas), culminating in Chief Financial Officer commencing in November 2019. His responsibilities at Adamas included finance, accounting, investor relations, information technology and facilities. From June 2013 until March 2015, he was Vice President, Finance and Corporate Controller of InterMune Inc., a commercial-stage biotech with responsibilities over all aspects of corporate accounting, reporting, and treasury. Prior to that, Mr. Prentiss was Senior Director, Controller at Dynavax Technologies Corporation, a clinical-stage biopharmaceutical company, from May 2012 to June 2013, where he was responsible for the accounting and tax functions. Between 2005 - 2012, he worked here at MannKind, where he held senior finance positions of increasing responsibility. Prior to that, Mr. Prentiss was a Senior Manager at KPMG LLP in the assurance practice. Mr. Prentiss received a B.Sc. degree in Accounting from Loyola Marymount University, and an MBA from Indiana University. Mr. Prentiss is a licensed CPA (inactive) in California.

Anthony Hooper has been one of our directors since January 2020. He is also a director of BeiGene, Ltd. and Amplity Health. Mr. Hooper served as executive vice president of Global Commercial Operations for Amgen Inc. from Oct 2011 until August 2018. Prior to joining Amgen, Mr. Hooper spent more than 15 years at Bristol-Myers Squibb. His last role there was Senior Vice President, Global Commercial Operations and president of the company's pharmaceutical business in the Americas, Japan and intercontinental regions. Previously, he was Assistant Vice President of Global Marketing for Wyeth Laboratories and led the international marketing group for Lederle International. Mr. Hooper earned law and MBA degrees from the University of South Africa.

Jennifer Grancio has been one of our directors since March 2020. Since October 2023, Ms. Grancio has been the Global Head of Wealth at the TCW Group. From October 2020 until October 2023, Ms. Grancio served as the Chief Executive Officer of Engine No. 1, an impact investment firm. From November 2018 until October 2020, she consulted through Grancio Capital, where she worked with CEOs to accelerate high-growth company success. From 1999 to 2018, she served as a founder and executive with BlackRock's iShares business, where she spearheaded the distribution of iShares in the United States and Europe and acted as the Global Head of Marketing and Partnerships for BlackRock's index business. Prior to BlackRock, she was a senior associate with PricewaterhouseCoopers, a management consulting firm. Ms. Grancio serves as a board member for Ethic Inc., a sustainable investing firm, and for Harvest Savings & Wealth Technologies, Inc. She is also on the advisory boards of Say Technologies LLC and m+ funds (from Alaia Capital, LLC). Ms. Grancio earned a bachelor's degree in economics and international relations from Stanford University, and an MBA degree in strategy and finance from Columbia Business School.

Sabrina Kay, Ed.D. has been a member of our Board of Directors since December 2020. Currently, Dr. Kay serves as Founder and CEO of Fremont Private Investments, where she has led the operations and exits of several companies including The Art Institute of Hollywood (sold to Education Management Corp.), Premier Business Bank (sold to First Foundation Inc.), Fashion Umbrella, Fremont College, and Dale Carnegie of Los Angeles. Dr. Kay currently serves on the boards of East West Bank (NASDAQ: EWBC) and Hagerty (NYSE:HGTY). She is also a philanthropist, having served on more than 30 charitable and civic boards, including the Los Angeles Sports and Entertainment Commission, Petersen Automotive Museum, Portal Schools, the Leadership Council of International Medical Corps Leadership Council, the Board of Leaders of USC Marshall School and After-School All-Stars Los Angeles, which she chairs. Dr. Kay received Ed.D. and M.Sc. degrees in education from the University of Pennsylvania. She also holds an MBA from the University of Southern California.

Michael A. Friedman, M.D. has been one of our directors since December 2003. In 2014, Dr. Friedman completed a decade of service as the President and Chief Executive Officer of the City of Hope National Medical Center. Previously, from September 2001 until April 2003, Dr. Friedman held the position of Senior Vice President of Research and Development, Medical and Public Policy, for Pharmacia Corporation and, from July 1999 until September 2001, was a Senior Vice President of Searle, a subsidiary of Monsanto Company. From 1995 until June 1999, Dr. Friedman served as Deputy Commissioner for Operations for the Food and Drug Administration, and was Acting Commissioner and Lead Deputy Commissioner from 1997 to 1998. He served on the board of Celgene Corporation from February 2011 to December 2019 and on the board of Smith & Nephew plc from April 2013 to April 2019. Dr. Friedman received a Bachelor of Arts degree, magna cum laude, from Tulane University, New Orleans, Louisiana, and a doctorate in medicine from the University of Texas, Southwestern Medical School.

Dr Ajay Ahuja, MD, MBA has been our Executive Vice President and Chief Medical Officer since September 2025. Dr. Ahuja brings to MannKind more than two decades of leadership experience across the biopharmaceutical industry, spanning development-stage companies and global pharmaceutical firms since 2003. From January 2025 to September 2025, Dr. Ahuja served as the Development and Launch Leader for a late-stage DNA-based therapeutic at Kardigan Bio, a cardiology-focused biopharmaceutical company. Between February 2021 and January 2025, Dr. Ahuja held a senior leadership role at Idorsia Pharmaceuticals, where he built out the US Medical department and launched multiple novel compounds. Earlier in his career, he served as Global Head of Medical Affairs at Allergan, overseeing all therapeutic areas and a team of over 100 professionals across the U.S. and international markets. Dr. Ahuja also served as Global Medical Head for Takeda Pharmaceuticals' cardiometabolic franchise, with a focus on diabetes and cardiovascular disease, and has also held impactful roles at GSK, Pfizer, Novartis, and Tepha, Inc. Dr. Ahuja earned his Doctor of Medicine from Washington University School of Medicine and completed his residency and fellowship training at Northwestern University and Harvard Medical School, respectively. As a board-certified physician, Dr. Ahuja practiced medicine on staff at Boston Children's Hospital for over a decade. He also earned an MBA from Harvard Business School before embarking on his industry career.

Sanjay Singh has been our Executive Vice President, Technical Operations since October 2022. Before joining us, since 2011 Mr. Singh served as Sr. Vice President and Associate President Technical Operations in India and USA at Aurobindo Pharma, a leading generic pharmaceutical manufacturing company, headquartered in Hyderabad, India. Prior to Aurobindo, Mr. Singh worked in various leadership roles at Cipla Ltd (2000 - 2007, 2008 - 2011), Glenmark Pharma (2007-2008), Nicholas Piramal India Ltd (1992-2000) and Cadila Laboratories (1990-1991). Mr. Singh has been associated with the Parenteral Drug Association (PDA) and was the founding president of the PDA, India chapter before moving to the US in 2015. Mr. Singh received an M. Pharma. degree in Pharmaceutical Chemistry from LM College of Pharmacy, Ahmedabad, India and an MBA degree from Institute of Management Studies, Indore, India.