Joseph F. Lawler, M.D., Ph.D.

Founder and Director

Joseph F. Lawler, M.D., Ph.D. founded our company in April 2020 and has been a member of our board of directors since inception. He briefly served as our President from April to June 2020. Dr. Lawler is also the founder and has served as Managing Member of JFL Capital Management LLC, a healthcare investment fund with an emphasis on companies pursuing clinical drug development, since January 2015. Prior to his involvement with JFL Capital Management LLC, Dr. Lawler was a co-founder and served as Senior Managing Partner of Merus Capital Partners, LLC, a proprietary trading business, from October 2011 to November 2014. Dr. Lawler served as portfolio manager at MKM Longboat Capital Advisors LLC, a London-based hedge fund manager, from February 2008 to November 2008. Prior to that, Dr. Lawler was responsible for public and private biotechnology investments as an analyst at Och-Ziff Capital Management Group LLC, a hedge fund manager and global alternative asset management firm, from May 2006 to February 2008. Dr. Lawler served as an analyst at Sagamore Hill Capital Management LP, a multi-strategy hedge fund manager, from March 2005 to May 2006, and also previously served as an associate in the venture capital group at J.P. Morgan Partners, LLC, from March 2003 to March 2005. Dr. Lawler received his M.D. and Ph.D. from The Johns Hopkins University School of Medicine and he earned his B.A. degree from Queens College, City University of New York.

Simon Allen

Chief Executive Officer and Director

At Ambrx, Mr. Allen established multiple partnerships with companies including Bristol Myers Squibb, Pfizer, Merck, Eli Lilly, Astellas, BeiGene and Sino Biopharma that have generated more than $270 million in revenue with a potential $1 billion in future milestones and royalties. From 2016 to 2018 he was Chief Executive Officer of CohBar, where he transitioned the company from the preclinical to the clinical stage and managed the listing of its shares on Nasdaq, with subsequent inclusion in the Russell 2000 Index. Earlier Mr. Allen held various management, commercial and business development positions at Nuvelo, Skyepharma, CovX and Kalypsys.

Mr. Allen started his career as a research biologist in the antiviral group at Gilead Sciences before working in healthcare equity research and investment banking in the U.S. and Australia. He holds a BSc in biochemistry and genetics from the University of Sydney and an MBA from the Australian Graduate School of Management.

Jason M. Aryeh


Jason M. Aryeh joined our board of directors in March 2021. He is the founder and managing general partner of JALAA Equities, LP, a private hedge fund focused on the biotechnology and medical device sectors, and has served in such capacity since 1997. Mr. Aryeh has served as a member of the board of directors of Ligand Pharmaceuticals Inc., a publicly-traded biopharmaceutical company focused on developing or acquiring technologies that help pharmaceutical companies discover and develop medicines, since September 2006. Mr. Aryeh has also served as a director of Orchestra BioMed, Inc., a private biomedical innovation company focused on developing transformative therapeutic products, since November 2018. Mr. Aryeh has served as a director of numerous public and private companies. Mr. Aryeh earned a B.A. in economics, with honors, from Colgate University, and is a member of the Omnicron Delta Epsilon Honor Society in economics.

Nat Calloway, Ph.D.


Dr. Calloway is an analyst and partner at 22NW, LP, a Seattle-based value fund specializing in small and microcap investments with a multi-year investment horizon, where he has been employed since June 2021. Dr. Calloway is the lead for 22NW, LP’s biotechnology, pharmaceutical and other healthcare investments, including Anebulo Pharmaceuticals, Inc. Prior to that, Dr. Calloway was the Associate Director of Healthcare Research for Edison Group from December 2015 to June 2021. Dr. Calloway is also on the board of Lifecore Biomedical, an integrated CDMO company specializing in sterile injectables. He has a PhD in Chemistry and Chemical Biology from Cornell University, a Masters of Science in Chemistry from Columbia and completed a post-doctoral study in neuroscience at Weill Cornell Medical School. He has 10 scientific publications in the areas of physical chemistry, biochemistry and neuroscience.

Aron R. English


Aron R. English has been a member of our board of directors since June 2020. He is the founder and has served as the President and Portfolio Manager of 22NW, LP, a Seattle-based value fund specializing in small and microcap investments with a multi-year investment horizon, since August 2014. Previously, Mr. English served as the director of research at Meson Capital Partners LLC, an investment firm, from January 2014 to August 2014. Prior to that, he served as director of research at RBF Capital, LLC, a provider of wealth management and financial services, from September 2010 until December 2013, after initially serving as a research analyst at the firm from September 2008 to September 2010. Mr. English served as a research assistant at McAdams Wright Ragen Inc., an investment firm, from March 2006 until September 2008. Mr. English earned his B.A. degree in English Literature with honors from the University of Washington.

Areta Kupchyk


Areta Kupchyk joined our board of directors in April 2021. Ms. Kupchyk is a partner in the law firm of Foley Hoag LLP, where she co-chairs the firm’s FDA Law practice group, since October 2015. She was also an attorney at two other law firms from 2003 to 2015. Ms. Kupchyk is an FDA lawyer who advises biotechnology, medical device and pharmaceutical companies, as well as healthcare providers and institutions, researchers and investors on FDA-related matters. She previously served as Associate Chief Counsel for Drugs and Biologics and Assistant General Counsel for Litigation at the FDA from 1993 to 2003. Ms. Kupchyk received a B.A. degree from the University of Maryland Baltimore County and J.D. from the University of Maryland School of Law.

Kenneth Lin, M.D.


Kenneth Lin, M.D. joined our board of directors in February 2021. From January 2015 to July 2019, Dr. Lin founded and served as the President and CEO of Ab Initio Biotherapeutics, a biologics discovery company targeting G protein coupled receptors, through to its sale to Ligand Pharmaceuticals. From July 2012 to July 2014, Dr. Lin was the Vice President of Corporate Development and Investor Relations for Ulthera, Inc., a medical device company that was acquired by Merz Pharma. From April 2008 to June 2012, Dr. Lin was a Vice President at TPG, a private equity investment firm, where he focused on healthcare. From August 2003 to June 2007, Dr. Lin was an associate at JPMorgan Partners, a private equity investment firm. From September 2000 to June 2003, he was an associate in the Global Equity Research Division of Goldman Sachs. Dr. Lin received his M.D. from Case Western Reserve University with honors and his B.S. degree in Biological Sciences from Stanford University.

Karah Parschauer


Karah Parschauer joined our board of directors in February 2021. Since June 2016, Ms. Parschauer has served as General Counsel and Executive Vice President of Ultragenyx Pharmaceutical, Inc., a clinical-stage biopharmaceutical company. Prior to Ultragenyx, Ms. Parschauer served in various executive capacities, and most recently as Vice President, Associate General Counsel, at Allergan plc, a pharmaceutical company, from June 2005 until June 2016. Prior to Allergan, Ms. Parschauer was an attorney at Latham & Watkins LLP, where she practiced in the areas of mergers and acquisitions, securities offerings, and corporate governance. She has served as a member of the board of directors of Evolus, Inc., a medical aesthetics company, since July 2019 and of Arcturus Therapeutics, Ltd., a clinical-stage messenger RNA medicines company, since June 2019. Ms. Parschauer holds a B.A. degree in Biology from Miami University and a J.D. from Harvard Law School.