Third Arc Bio
Powering Superior Immune Synapses
Third Arc Bio was founded in 2022, is headquartered in Spring House, United States, lists 11–50 employees, and has $217.0M in recorded funding across 2 rounds.
- Headquarters
- Spring House, Pennsylvania
- Employees
- 11–50
- Founded
- 2022
- Business Model
- B2B
- Website
- thirdarcbio.com
- Total Funding
- $217.0M
- Last Round
- $52.0M Extension RoundFeb 2026
- Rounds
- 2
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 2 funding rounds and 1 investor for this company. The full record is or through the API.
About
Third Arc Bio is a biopharmaceutical company advancing antibody technology by harnessing the biology of immune synapses to address solid tumors and autoimmune diseases. The company is developing next-generation immunotherapies targeting indications with significant unmet need.
Summary
Third Arc Bio is a Biotech company based in Spring House, United States, founded in 2022. It lists 11–50 employees. It has raised $217.0M in total across 2 rounds, most recently a $52.0M Extension Round in Feb 2026. Investors include Andreessen Horowitz.
Tech & App Stack
3 technologies & apps tracked
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Funding History
Feb 2026
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Funding: Series A through Extension Round. Amounts, valuations, and investors where available.
Investors
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