Cary Pfeffer, M.D.

Chairman; Partner, Third Rock Ventures

Third Rock Ventures partner Cary Pfeffer is chairman of Neon Therapeutics’ board of directors. He joined Third Rock Ventures at its inception in 2007 and has more than 20 years of business development and transaction experience, along with a broad array of biotech product development experience. Cary leads Third Rock’s partner development efforts, including building and maintaining strong relationships to work with large biotech and pharmaceutical companies. He has played an instrumental role in a number of innovative alliances and collaborative company-building efforts across Third Rock’s portfolio, including industry-leading global strategic collaborations between Agios and Celgene in the field of cancer metabolism, and Nurix and Celgene in the field of ubiquitin ligases. Cary supports and advises on business development efforts across Third Rock’s portfolio and has also assumed active leadership roles in its portfolio companies, functioning as chief executive officer and chief business officer through the first 12 to 18 months after launch. Cary was the interim chief business officer of Eleven Biotherapeutics, interim CEO of Jounce Therapeutics and Neon Therapeutics, and currently serves as a board member of Ablexis, Edimer and Jounce Therapeutics.

Before joining Third Rock, Cary founded The Pfeffer Group, a boutique consulting firm that provided business development and strategy advisory services, completing multiple transactions for leading biotechnology and life sciences companies. Prior to that, Cary spent more than a decade at Biogen, where he held a variety of senior and executive-level U.S. and global management roles focused on business and market development, product development and commercial operations. Earlier in his career, Cary spent several years in corporate finance in the Health Care Investment Banking Group of Lehman Brothers.

Cary earned his M.D. from the University of Pennsylvania, his MBA from the Wharton School of the University of Pennsylvania and a B.A. in biochemistry from Columbia University.