Amunix Pharmaceuticals
ClosedMountain View, United States · $308.5M raised
- Headquarters
- Mountain View, California
- Employees
- 11–50
- Business Model
- B2B
- Total Funding
- $308.5M
- Last Round
- $118.5M Series DJan 2025
- Rounds
- 3
About
Amunix Pharmaceuticals was a Mountain View, California-based immuno-oncology company developing masked T-cell engagers and protein therapeutics for solid tumor cancers using its proprietary XTEN technology platform. The company raised $73 million in 2020 and $117 million in 2021 before being acquired by Sanofi in December 2021 for approximately $1 billion upfront, with its pipeline advancing toward clinical development. Its most advanced program, AMX-818, targeted HER2-expressing solid tumors.
Summary
Amunix Pharmaceuticals is a Biotech company based in Mountain View, United States. It has raised $308.5M in total across 3 rounds, most recently a $118.5M Series D round in Jan 2025. Investors include Viking Global and Omega Funds.
Sign up to view the funding chart
Create a free account — you'll get 10 credits a month to unlock funding history, valuations, and tech stacks.
Funding History
Jan 2025
Sign up to see all 3 rounds
Full funding history, per-round amounts, and investor participation.
Investors
Similar Companies
One of the world's largest contract research organizations (CROs), providing end-to-end clinical ...
Global contract development and manufacturing organization (CDMO) focused exclusively on sterile ...
Global contract research organization providing comprehensive drug development and laboratory ser...

Global fertility clinics platform
Biopharmaceutical services company
Biotech advancing cellular rejuvenation programming to restore cell health and reverse disease.