Executives and Management

Aptorum has a highly experienced management team made up of individuals who have held senior positions in international pharmaceutical and financial companies. The management team is responsible for the strategic direction, operations and success of the company.


Chief Executive Officer and Executive Director

Mr. Darren Lui is the Chief Executive Officer and Executive Director since June 2022. Before that, he was President and an Executive Director of Aptorum Group Limited. Mr. Lui was previously the founder, director and responsible officer of Varengold Capital Securities Limited and Varengold Capital Asset Management Limited in Hong Kong, with subsidiaries operating brokerage, asset management, and investment businesses in Asia established since January 2015. Prior to this, he was a Director within the Fixed Income Group of Barclays Capital, where he spent over nine years from September 2005 to February 2014 developing and establishing their London, Singapore and New York teams. From September 2002 to August 2005 he was qualified as a Chartered Accountant with Ernst & Young LLP (London), specializing in capital markets advisory. Mr. Lui graduated with First-Class Honors from Imperial College, London with a BSc degree in Biochemistry in June 2002. He is a Chartered Accountant (ICAS), accredited with Chartered Financial Analyst designation, and an Associate of Chartered Institute of Securities & Investments (UK).


Chief Medical Officer and Executive Director

Dr. Clark Cheng is the Chief Medical Officer and Executive Director of Aptorum Group Limited. He is also an executive director of Aptorum Medical Limited (one of the Aptorum Group Limited’s subsidiaries); Dr. Cheng also serves as a director of several other of our subsidiaries. Prior to this appointment, Dr. Cheng served as the Operations Director since 2009 of Raffles Medical Group, and the company’s Deputy General Manager since 2011, representing an expanded role in the region. During his employment with Raffles Medical Group, he practiced as a full-time medical administrator to mainly overlook Raffles Medical Hong Kong operations and also supported its development in the PRC HQ. Dr. Cheng received his medical training at the University College London, UK, in 2005 and completed his foundation year training at The Royal Free Hospital in 2007. Pursuing his career in surgery, he obtained his membership of the Royal College of Surgeons of Edinburgh in 2009 and commenced his training in Orthopaedics where he practiced as Specialist Registrar at the National University Hospital, Singapore, with special interest in Traumatology of the lower limbs. In 2011, he also obtained his Master in Business & Administration with distinction from Tippie College of Business, University of Iowa, US. Dr. Cheng is an active member of the Singapore Chamber of Commerce, and appears regularly as a guest speaker for The Open University of Hong Kong, The Airport Authority Hong Kong and other corporate events.


Head of Finance

Mr. Martin Siu is the Head of Finance of Aptorum Group Limited since July 2022. Prior to that, Mr. Siu supported over 8 listed companies and licensed corporations in Asia as consultant, advisor and financial manager. Extensively experienced in audit and financial strategy, he worked in the field of audit for over 18 years, also led a professional team to provide strategic consultancy services to sizable corporate clients specialized in audit, compliance, risk management, financial reporting and fund raising. Mr. Siu is a certified public accountant and graduated with a BBA (Hons) in Accounting at City University of Hong Kong in 2001.


Head of Research & Development

Dr. Thomas Lee is the Head of Research & Development of Aptorum Group Limited. He served as Chief Executive Officer and Chief Scientific Officer of Aptorum Therapeutics Limited, a wholly-owned therapeutics subsidiary of Aptorum Group Limited from January 2018 to March 2019. Prior to that, Dr. Lee served as an Assistant Professor in the School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong from August 2013 to January 2018. Dr. Lee’s key area of research involves drug delivery with specialties including: formulation development of poorly soluble compounds, oral delivery, Nanotechnology, and similar fields. Prior to academia, Dr. Lee accumulated big-pharma experience from the decade he spent at two multinational pharmaceutical companies in the U.S. From November 2008 to July 2013, Dr. Lee worked at Celgene Corporation as a Senior Scientist of the Formulations Research & Development. From June 2003 to November 2008, Dr. Lee worked at Novartis Pharmaceuticals Corporation, as a Principal Scientist. Dr. Lee graduated with B.Pharm. (Hons) Degree from The Chinese University of Hong Kong in December 1995 and received his Ph.D. in Pharmaceutical Sciences (Drug Delivery) from the University of Wisconsin-Madison in the U.S in May 2003.

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