Board of Directors

Mr. Peacock is our Chairman of the Board and has served on our Board since 2017. He is a member of the Nominating and Governance Committee. Mr. Peacock also serves as Chair of the Board of Directors and ad interim Chair of the Audit Committee at UCB SA. Mr. Peacock served as the Chief Financial Officer of Amgen, Inc., a biopharmaceutical company, and was the Chief Financial and Administrative Officer of the Pharmaceuticals Division of Novartis AG, a global healthcare company. Previously he was a partner at McKinsey and Price Waterhouse. More recently, Mr. Peacock has served as Chairman and as CEO of Bellerophon Therapeutics, Inc., as a founder and Chairman of Arix Bioscience PLC, and as a director of Kite Pharma and Genmab A/S.

Mr. Peacock earned an M.A. in Economics from the University of St. Andrews in Scotland and is a Chartered Accountant. Mr. Peacock’s prior senior leadership experience, including as chief executive officer and chief financial officer, current and past experience as a board member at other companies and his expertise in strategy, finance, international business transactions, mergers and acquisitions and operations, along with his independence, make him a valuable member of our Board.

Michael Stubblefield is our President and CEO, a position he has held since May 2014. Prior to assuming his current position, Mr. Stubblefield served as a Senior Expert for Chemicals Practice of McKinsey & Company from 2013 to 2014. Prior to this role, Mr. Stubblefield held a variety of roles at Celanese Corporation from 1994 to 2012, including Vice President and General Manager, Advanced Engineered Materials and Chief Marketing Officer. Mr. Stubblefield earned a bachelor’s degree in chemical engineering from the University of Utah, as well as an MBA from Texas A&M University-Corpus Christi.

Juan Andres has served on our Board since September 2019 and is a member of the Audit & Finance Committee. Mr. Andres is the President, Strategic Partnerships and Enterprise Expansion for Moderna, Inc., where he previously served as Chief Technology Operations and Quality Officer. Prior to those roles, Mr. Andres served in several leadership positions at Novartis, most recently serving as the Global Head of Technical Operations (Manufacturing and Supply Chain). In previous roles at Novartis, Mr. Andres served as Group Novartis Quality Head, Global Head of Technical Research and Development, and Global Pharmaceuticals Operations Head. Mr. Andres also spent 18 years at Eli Lilly Company, serving in a variety of leadership positions. Mr. Andres serves on the board of directors of Ring Therapeutics. Mr. Andres holds a master’s degree in pharmacy from Alcala de Henares University in Madrid, Spain, and has completed an advanced development program at the London Business School. Mr. Andres’ extensive experience in pharmaceutical manufacturing, supply chain and technical research, along with his independence, makes him a valuable member of our Board.

Dr. John Carethers has served on our Board since July 2021 and is a member of the Nominating and Governance Committee. Dr. Carethers is the Vice Chancellor for Health Sciences at the University of California San Diego, a position he has held since January 2023. In this role, he leads the School of Medicine, Skaggs School of Pharmacy and Pharmaceutical Sciences, The Herbert Wertheim School of Public Health and Human Longevity Science, and UC San Diego Health. Previously, Dr. Carethers served as the John G. Searle Professor and Chair of the Department of Internal Medicine at the University of Michigan Medical School from 2009 – 2022, where he was named the C. Richard Boland Distinguished University Professor in 2017. Prior to that time, Dr. Carethers served in a variety of roles at the University of California San Diego, including as a Professor of Medicine and Chief of the Division of Gastroenterology.

Dr. Carethers was elected as a member of the National Academy of Medicine in 2012 and became an elected fellow of the Royal College of Physicians in 2021. In June 2022, Dr. Carethers became President of the American Gastroenterological Association.

Dr. Carethers holds an M.D., as well as a Bachelor of Science in biological sciences from Wayne State University, completing his internship and residency in internal medicine at Massachusetts General Hospital and his fellowship in gastroenterology at the University of Michigan. Dr. Carethers’ senior leadership experience at a medical college and extensive research experience in familial cancer syndromes, including tumor genetics, DNA mismatch repair, and colorectal cancer disparities, along with his independence, make him a valuable member of our Board.

Lan Kang has served on our Board since May 2021. Ms. Kang is Managing Director at CBC Group, a healthcare-focused private equity investment firm based in Shanghai, China, a position she has held since December 2020, and serves on the board of directors of Everest Medicines. Previously, Ms. Kang served as a Senior Advisor to Shanghai Henlius Biotech, a global clinical-stage biopharma company. Ms. Kang also served in a variety of roles at Fosun International, a Hong Kong stock exchange listed, consumer-focused multinational company, including Executive Board Director, Chief Human Resources Officer and Head of the Fosun Insurance Group. Prior to Fosun, she was a Senior Client Partner at Korn Ferry International and was an Engagement Manager at McKinsey & Company. Ms. Kang holds an MBA in healthcare management from The Wharton School of the University of Pennsylvania, a master’s degree in chemistry from Tulane University and a bachelor’s degree in biological science and technology from Zhejiang University in Hangzhou, China. Ms. Kang’s extensive experience in healthcare and biopharma, along with her independence, makes her a valuable member of our Board.

Joseph Massaro has served on our Board since November 2021. Mr. Massaro currently serves as Chief Financial Officer and Senior Vice President, Business Operations for Aptiv, Inc., a position he has held since September 2020. Prior to that, Mr. Massaro held several senior executive positions at Aptiv including Vice President and Corporate Controller. He also previously served as Chief Financial Officer at inVentiv Health and as a Managing Director at Liberty Lane. Mr. Massaro earned an MBA and a Master of Science in accounting from Northeastern University. He holds a Bachelor of Science in finance and economics from Bentley University. Mr. Massaro’s senior leadership experience, including as a Chief Financial Officer, and his expertise in finance, along with his independence, make him a valuable member of our Board.

Mala Murthy has served on our Board since October 2021. Ms. Murthy currently serves as the Chief Financial Officer for Teladoc Health, Inc., a position she has held since June 2019. Prior to that, Ms. Murthy held several senior executive positions at American Express, most recently as Chief Financial Officer of the Global Commercial Services segment. She also previously served in various leadership positions with PepsiCo, leading high growth business units. Ms. Murthy earned an MBA from the India Institute of Management, a master’s degree in public and private management from Yale School of Management, and a bachelor’s degree in computer science and engineering from Jadavpur University in India. Ms. Murthy’s senior leadership experience, including as a Chief Financial Officer, and her expertise in finance and strategic growth, along with her independence, make her a valuable member of our Board.

Dr. Michael Severino has served on our Board since April 2020 and is Chair of the Compensation & Human Resources Committee. Dr. Severino currently serves as Chief Executive Officer of Tessera Therapeutics, the biotechnology company pioneering GENE WRITING technology which consists of multiple platforms designed to offer scientists and clinicians the ability to write therapeutic messages into the human genome, thereby curing diseases at their source. Prior to this role, Dr. Severino served as Vice Chairman and President of AbbVie. In his eight years with AbbVie, Dr. Severino also served as EVP of Research and Development and as Chief Scientific Officer where he led efforts to build a strong pipeline and advance promising science for patients in the areas of hematologic oncology, immunology and neuroscience. He also spent 10 years at Amgen, Inc., serving in a variety of leadership positions, including Senior Vice President Global Development, and Chief Medical Officer. Dr. Severino also serves on the board of directors for the Field Museum in Chicago, Illinois. He earned an M.D. from Johns Hopkins University, completing his residency and fellowship training at Massachusetts General Hospital and Harvard Medical School, as well as a bachelor’s degree in biochemistry from the University of Maryland. Dr. Severino’s extensive experience in research and development and corporate strategy for leading companies focused on developing life-saving therapies for patients, along with his independence, makes him a valuable member of our board.

Christi Shaw has served on our Board since November 2018 and is a member of the Compensation & Human Resources Committee and the Nominating & Governance Committee. Ms. Shaw currently serves as Chief Executive Officer of Kite, the cell therapy company of Gilead. Prior to this role, Ms. Shaw was Senior Vice President of Eli Lilly Company, and President of Lilly Bio-Medicines, the business within Eli Lilly Company that comprises neuroscience and immunology. In former roles, Ms. Shaw held several leadership roles, including U.S. Country Head and President of Novartis Pharmaceutical Corporation and North American Region Head of Novartis Oncology. Previously, Ms. Shaw has also held several leadership positions at Johnson & Johnson, Inc. Ms. Shaw serves as an executive board member of the Biotechnology Innovation Organization and is the co-founder of the More Moments More Memories Foundation to assist people with cancer and their caregivers. Ms. Shaw holds an MBA from the University of Wisconsin and a BBA in marketing from Iowa State University. Ms. Shaw’s extensive senior leadership experience within the healthcare industry and service as a Board Member of a large trade organization, along with her independence, make her a valuable member of our Board.

Greg Summe has served on our Board since May 2020 and is Chair of the Nominating & Governance Committee and a member of the Compensation & Human Resources Committee. Mr. Summe currently serves as Co-Chairman for NextGen Acquisition Corporation and as Managing Partner of Glen Capital Partners, a Boston-based hedge fund, which he founded in 2014. He also serves on the board of directors of the State Street Corporation and NXP Semiconductors NV. Prior to this, he was Managing Director and Vice Chairman of Global Buyout at The Carlyle Group. He also spent 11 years as the Chairman and Chief Executive Officer of PerkinElmer. Before PerkinElmer, Mr. Summe was with AlliedSignal, now Honeywell International, serving as the President of General Aviation Avionics, President of the Aerospace Engines Group and President of the Automotive Products Group. Mr. Summe holds an MBA with distinction from The Wharton School of the University of Pennsylvania, a master’s degree in electrical engineering from University of Cincinnati and a bachelor’s degree in electrical engineering from University of Kentucky. He is in the Engineering Hall of Distinction at the University of Kentucky. Mr. Summe’s extensive leadership experience in key industries, including life sciences and applied materials, along with his independence, make him a valuable member of our Board.