›Portfolio Companies

Past, Present and Future Leaders

InterWest is proud and privileged to partner with visionary management teams who are shaping the future of Information Technology and Healthcare. The companies they have started are vital parts of the portfolio of industry-leading startups that InterWest has helped over the last four decades.

Our Companies


467 First Street, Suite 201
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Early stage IT and Healthcare Investing

Tizona Therapeutics


company snapshot

Tizona Therapeutics

Tizona Therapeutics, Inc. is a preclinical stage biotechnology company that is developing multiple, innovative immuno-oncology therapies. Tizona Therapeutics, Inc. was founded by MPM Capital and leading scientists from Dana Farber Cancer Institute, the University of Pittsburgh, Johns Hopkins, Memorial Sloan Kettering Cancer Center, and Brigham and Women’s Hospital.

Investment Team
Christine O’Brien, President & CEO