TRexBio
formerly Trex BioTRexBio is a biotech company in South San Francisco, United States, founded in 2018. It has raised $219.0M across 4 rounds, most recently a $50.0M Extension Round in January 2026.
TRex Bio
- Headquarters
- South San Francisco, California
- Employees
- 11–50
- Founded
- 2018
- Business Model
- B2B
- Website
- trex.bio
- Total Funding
- $219.0M
- Last Round
- $50.0M Extension RoundJan 2026
- Rounds
- 4
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 4 funding rounds and 12 investors for this company. The full record is or through the API.
About
TRexBio is a South San Francisco-based clinical-stage biotechnology company developing purpose-built biologics that restore immune balance in autoimmune and inflammatory diseases. Founded in 2018 with seed funding from SV Health Investors, TRexBio's platform leverages deep tissue biology to design biologics capable of selectively modulating immune responses. The company raised M in a Series B extension in January 2026 to advance its pipeline including programs for atopic dermatitis.
Summary
It lists 11–50 employees. It has raised $219.0M in total across 4 rounds, most recently a $50.0M Extension Round in Jan 2026. Investors include Delos Capital, Polaris Partners and SV Health Investors.
Tech & App Stack
5 technologies & apps tracked
Every product and vendor across these categories, with where each signal came from.
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Funding History
Jan 2026
Sign up to see all 4 events
Funding: Series A through Extension Round. Amounts, valuations, and investors where available.
Investors
Delos Capital
1 round
Polaris Partners
1 round
SV Health Investors
2 rounds
Pfizer Ventures
2 rounds
Johnson & Johnson Innovation
2 rounds
Alexandria Venture Investments
2 rounds
Eli Lilly
2 rounds
Janus Henderson Investors
1 round
Balyasny Asset Management
1 round
Affinity Asset Advisors
1 round
Avego Bioscience
1 round
Agent Capital
1 round
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