Stealth Biotherapeutics
IPOStealth BioTherapeutics Inc.
Public · Needham, United States · Founded 2007 · $53.5M raised
- Headquarters
- Needham, Massachusetts
- Employees
- 51–200
- Founded
- 2007
- Business Model
- B2B
- Website
- stealthbt.com
- Total Funding
- $53.5M
- Last Round
- $20.0M Venture RoundJul 2026
- Rounds
- 3
- Type
- Public
About
Stealth BioTherapeutics is an innovative biopharmaceutical company developing therapies to treat mitochondrial dysfunction associated with genetic mitochondrial diseases and common diseases of aging. Founded in 2007 and headquartered in Needham, Massachusetts, the company collaborates with patients, advocacy organizations, and leading academic and medical institutions to advance a platform of late-stage clinical programs targeting rare genetic diseases and aging-related conditions. In 2026, the company rebranded as Mighty Therapeutics to reflect its continued commitment to advancing mitochondrial medicine.
Summary
Stealth Biotherapeutics is a Biotech company based in Needham, United States, founded in 2007. It has raised $53.5M in total across 3 rounds, most recently a $20.0M Venture Round round in Jul 2026. Investors include Morningside Venture Investments, K2 HealthVentures and Horizon Technology Finance.
Tech & App Stack
1 technologies & apps tracked
Every product and vendor across these categories, with where each signal came from.
Create a free account with 25 free credits every month, no card needed, to unlock the full tech & app stack, funding history, and valuations.
Funding History
Jul 2026
Sign up to see all 7 rounds
Venture Round through Series B — per-round amounts, valuations, and who invested in each round.
Investors
Similar Companies
China's leading blood products manufacturer
Global contract research organization providing comprehensive drug development and laboratory ser...
IVI-RMA provides fertility treatments and patient-centered reproductive care, combining research,...
Altos Labs combines academic science and industry development to create medicines that restore ce...
inVentiv Health merged with INC Research to form Syneos Health, integrating clinical and commerci...
Specialty pharmaceutical company
Your company? Embed this profile
Add the live badge to your site — it stays current as your funding data updates.
<a href="https://indexed.vc/companies/stealth-biotherapeutics"><img src="https://indexed.vc/api/badge/company/stealth-biotherapeutics" alt="Stealth Biotherapeutics on Indexed.vc" width="260" height="76" /></a>