SonoThera

SonoThera is a biotechnology company dedicated to developing innovative ultrasound-guided nonviral gene therapy platforms. Founded by Dr. Steve Feinstein, Dr. Michael Davidson, and Kenneth Greenberg, the company focuses on enhancing the safety, efficacy, and cost-effectiveness of gene therapy. SonoThera utilizes microbubbles and ultrasound technology to deliver genetic medicines to various human organs. The company's primary service involves a non-invasive platform that uses microbubbles to deliver nucleic acid payloads to targeted sites within the body. By injecting microbubbles into the bloodstream and employing an FDA-cleared ultrasound device, SonoThera can guide these microbubbles to specific locations, creating transient pores in cell membranes for genetic material entry. SonoThera is developing genetic medicines aimed at treating chronic kidney diseases, hematologic disorders, neurodegenerative diseases, and certain cardiovascular conditions. SonoThera has secured significant funding from notable investors, including ARCH Venture Partners and Johnson & Johnson Innovation, and is actively seeking partnerships with biopharma companies to advance its development and commercialization efforts.

Research South San Francisco, United States ~46 employees Private · Series A

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Employees
46
Revenue / employee
$54.3K
Revenue ~$2.5M
Total funding
$91.1M
Last round Series A, Dec 2022
H1B filings, FY2025
2
Sponsors visas

H-1B sponsorship

H-1B Sponsorship Limited
H-1B Filings by Department
Engineering4

The department split adds up all the years listed above. FY2025 alone: 2 filings.

Funding

  • Dec 2022 · Series A · $60.8M · ARCH Venture Partners, Illumina Ventures, Johnson & Johnson Innovation
  • Apr 2022 · $30.4M · Vertex Ventures

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SonoThera FAQ

How many employees does SonoThera have?

SonoThera has about 46 employees (as of Oct 2026).

Does SonoThera sponsor H1B visas?

Yes. SonoThera filed 2 H1B (LCA) applications in FY2025, according to the latest U.S. Department of Labor disclosures. Most of them were for Engineering roles.

What is SonoThera's revenue per employee?

SonoThera makes about $54K in revenue per employee, based on $2.5M annual revenue and 46 employees.

How much funding has SonoThera raised?

SonoThera has raised $91.13M in total funding; its latest round was Series A in Dec 2022.

Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.