Paul Lem

Active Investor

CEO & Founder at Sparrow Bio

Ottawa, Ontario

Paul Lem, CEO & Founder at Sparrow Bio is an active investor based in Ottawa, Ontario. This profile covers what Paul Lem backs, at which stage, and how founders can reach out in 2026.

Dr. Paul Lem is an Angel Investor. Dr. Lem co-founded and served as Chief Medical Officer at Spartan. He is responsible for setting the company's strategy and leading its implementation. He also oversees sales and marketing and ensures that Spartan's culture stays true to its values. Paul co-founded Spartan with John Lem and Dr. Jamie Spiegelman in 2005. Prior to Spartan, Paul served as Vice President, Product Management at DNA Genotek (acquired by Orasure Technologies). He founded and served as Chief Executive Officer at Plexagen. Paul holds a bachelor's degree in human biology from the University of Toronto and a medical degree from the University of Ottawa. He graduated from the inaugural class of Singularity University. In 2010, Paul was honored with the $200K Premier's Catalyst Award for Best Young Innovator.

Investor type: Angel
Stages: Early Stage Venture
Invests in: Healthcare & BiotechDigital Health & HealthTechBiotech & PharmaMedTech & Medical DevicesSaaS & EnterpriseIoT & Connected Devices
Location: Ottawa, Ontario
Typical check: $500K
Past investments: 2

Notable investments

RavenThird Door Marketing

How to reach Paul Lem

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Frequently Asked Questions

What does Paul Lem invest in?

Paul Lem invests in Healthcare & Biotech, Digital Health & HealthTech, Biotech & Pharma and MedTech & Medical Devices, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.