- ThirtyFiveBio founded to develop GPR35 antagonists for GI diseases, Oxford UK
About ThirtyFiveBio
Revolutionising gastrointestinal health

History of ThirtyFiveBio
Founded in 2021 by a team of drug discovery experts and entrepreneurs, ThirtyFiveBio emerged from academic and proprietary analyses showing that GPR35 gain-of-function drives epithelial dysfunction in GI diseases.
Our goal is to break the response ceiling for patients with ulcerative colitis by developing a drug that targets underlying epithelial causality and dysfunction. We aim to have tested this principle in patients by 2028.
“Human colitis is an epithelial disease and novel modalities are required to tackle this”.
- ThirtyFiveBio founded to develop GPR35 antagonists for GI diseases, Oxford UK
2021
- Data emerges showing strong GPR35 genetic association with IBD is driven by gain-of-function variance
- GPR35 KO is protective in bacterial model of murine colitis
- Scientific advisory team
2022-23
- GPR35 antagonist discovery and optimisation and bioscience
2024
- Advanced lead molecule with 3 series under patent protection
- Synthetic route, scale up of lead antagonist
- Translational research collaboration with the Kennedy Institute
- Raising syndicated Series A to progress to clinic
2025
- Preclinical development candidate
- Preclinical PoC in patient-derived colitis epithelium
- KOL translational advisory group
2026+
- Clinic enabling
- First-in-human 1H 2027
2021
- $20M seed round Canaan Partners
- Data emerges showing strong GPR35 genetic association with IBD is driven by gain-of-function variance
- Scientific advisory team
2022-23
- Innovate UK BMC £0.7M grant (Translational Grant)
- GPR35 antagonist discovery and optimisation and bioscience
2024
- Second Innovate UK BMC £0.7M grant (Precision Medicine Grant)
- Advanced lead molecule with 3 series under patent protection
- Synthetic route, scale up of lead antagonist
- Translational research collaboration with the Kennedy Institute
2025
- AbbVie Ventures invest alongside Canaan Partners and Mayewell Capital
- Raising syndicated Series A to progress to clinic
- Preclinical development candidate
- Preclinical PoC in patient-derived colitis epithelium
- KOL translational advisory group
2026
- Clinic enabling
- First-in-human 1H 2027

Proud to be part of the Molecule to Medicine Ecosystem
Molecule to Medicine (MTM), has expertise in founding biotech companies and supplying integrated, stage-appropriate business operations and R&D services to enable successful progression from set-up to clinic.
Companies supported by MTM operate as part of an Ecosystem: a unique arrangement which generates value by leveraging the expertise of its native network of drug discovery professionals and its robust operational model.
Ecosystem companies, including ThirtyFiveBio, accelerate their development of novel therapeutics, sharing learning from previous experience through this collaborative internal and external networks and partners.