About Steven Feinstein
Steve Feinstein, MD, is co-founder and chief scientific officer of SonoThera. He invented Albunex and Optison, the first two FDA-approved ultrasound microbubble agents, and founded the International Contrast Ultrasound Society, where he is co-president.
Experience
This experience comes from official bios and from SEC filings. For roles taken from filings, the years are when the filings name Steven Feinstein in the role, so the role may have started earlier or lasted longer.
SonoThera, Inc. Current
Co-founder and Chief Scientific Officer
2026 – Present · South San Francisco, CA
SonoThera develops nonviral genetic medicines that use ultrasound and imaging microbubbles to deliver DNA and RNA into chosen organs, starting with Duchenne muscular dystrophy.
IS
International Contrast Ultrasound Society Current
Founder and Co-President
BC
Bubble Conference (Chicago) Current
Founder and Director
Education
- MD, University of Minnesota
- Internship and residency in internal medicine, Michael Reese Hospital, Chicago
- Fellowship in cardiology, University of California, Los Angeles / Wadsworth Veterans Administration
Key Colleagues at Startups
The people Steven Feinstein works with at each company, as listed on that company's latest Form D.
SonoThera, Inc. · Form D, Jun 30, 2026
KG
Kenneth Greenberg
Co-founder, President & CEO, director
MD
Michael Davidson
Co-founder & Executive Chairman
RJ
Rajul Jain
Director
SG
Steven Gillis
Director
Rakhshita Dhar
Director
CZ
Carolyne Zimmermann
Chief Business Officer
BH
Brian Halak
Director