# Star Therapeutics

> Star Therapeutics is a South San Francisco clinical-stage biotech building first-in-class antibody medicines for serious diseases, with a 'pipeline-in-a-product' approach. Its lead asset VGA039, developed through subsidiary Vega Therapeutics, is a once-monthly subcutaneous monoclonal antibody targeting Protein S, now in Phase 3 for von Willebrand disease.

- **Founded:** 2018
- **Headquarters:** South San Francisco, California, United States
- **Founders:** Adam Rosenthal (Founder & CEO)
- **Team size:** ~55
- **Products:** VGA039, Vega Therapeutics, Electra Therapeutics
- **Notable:** VGA039 advanced into pivotal Phase 3 trial for von Willebrand disease in 2025., FDA Fast Track Designation for VGA039., Orphan Drug Designation for VGA039.

## Products & services

- **VGA039** — First-in-class monoclonal antibody targeting Protein S, designed for once-monthly subcutaneous dosing. Lead asset in Phase 3 for von Willebrand disease; also being studied across additional bleeding indications.
- **Vega Therapeutics** — Star subsidiary focused on hematology and bleeding disorders; home of VGA039.
- **Electra Therapeutics** — Spinout from Star focused on antibody therapies in immunology and serious immune-mediated diseases.

## Achievements

- VGA039 advanced into pivotal Phase 3 trial for von Willebrand disease in 2025.
- FDA Fast Track Designation for VGA039.
- Orphan Drug Designation for VGA039.
- Raised ~$315M in total financing since inception.
- Spun out two operating subsidiaries (Vega and Electra) from a single platform philosophy.

## Latest updates

- **2025-09** — Closed oversubscribed $125M Series D co-led by Sanofi Ventures and Viking Global Investors.
- **2025** — Initiated Phase 3 program for VGA039 in von Willebrand disease.
- **2023-09** — Raised $90M to accelerate antibody pipeline and grow portfolio companies.

## Links

- Website: https://star-therapeutics.com
- LinkedIn: https://www.linkedin.com/company/star-tx
- Twitter/X: https://twitter.com/STAR_Biotech

---

Profile page: https://yespress.io/star-therapeutics
Published by YesPress — https://yespress.io
Last updated: 2026-05-18