Michael C. Diem practiced medicine for about six years before moving into venture investing, and he later added an MBA and a Kauffman Fellowship, giving him a mix of clinical, business, and investing training that's rare in the field; along the way he worked in nearly every major biotech role, from venture investor at SR One to business development leader at GSK Rare Diseases to corporate strategy chief at AstraZeneca to CFO/CBO at Century Therapeutics, with rare disease work showing up repeatedly across those stops. At Pfizer, he leads both Pfizer Ventures and Global Search and Evaluation together, and he's been named to Global Corporate Venturing's 2025 Powerlist of 100 leading corporate venturing professionals.
About their Fund
Pfizer Venture Investments is a strategic venture fund that doesn't require product or technology rights as a condition of investing, giving founders independence while still aiming for future collaboration with Pfizer, and its team blends venture investing with business development and drug discovery expertise to back frontier scientific bets—such as neuroscience, in-vivo cell engineering, dark-genome target discovery, and the blockchain-based longevity accelerator VitaDAO—that many biotech investors avoid. The fund also runs an active China strategy through a locally based venture vehicle and direct investments like OTR Therapeutics, and it has become a channel for strategic deals, with portfolio companies acquired by AbbVie, Ipsen, and Gilead/Kite.
















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