4BIO Capital — Seed & Series A VC Firm ($500K–$5.0M Checks)
4BIO Capital is a Seed, Series A venture capital firm based in London, United Kingdom investing in Healthcare, SaaS. The firm typically writes $500K–$5.0M checks and has 9 portfolio companies in our records.
- Check size
- $500K–$5.0M
- Portfolio
- 9 companies on record
- Partners
- 6 listed
- Stage
- Seed, Series A
- Sectors
- Healthcare, SaaS
- HQ
- London, United Kingdom
- AUM
- Not in our records
Last verified: 2026-10-25
Seed, Series A
$500K – $5.0M
9+ companies
6 partners
Investment Thesis
Early-stage investor focused on advanced therapies and high unmet medical need. While more therapeutics-oriented than pure SaaS, the firm is deeply biotech-native and may engage where software enables R&D, translational, or clinical workflows.
How 4BIO Capital invests
4BIO Capital is a vc firm based in London, United Kingdom. The firm invests at the Seed, Series A stages, with a focus on Healthcare, SaaS.
4BIO Capital typically writes checks of $500K–$5.0M per investment.
4BIO Capital has backed 9 companies in our records, including Actithera, Ray Therapeutics, Araris Biotech.
Partners & Team
Industry Focus
Invests In
Portfolio Companies (9)
Other
Actithera
Develops advanced radiopharmaceutical therapeutics.
Ray Therapeutics
Develops vision restoration therapies for severe retinal degeneration.
Araris Biotech
Develops next-generation antibody-drug conjugates (ADCs).
Trogenix
Develops precision viral immunotherapy for aggressive cancers.
Ascend
Gene and cell manufacturing specialist.
Cloverleaf Bio
Develops RNA-based cancer therapeutics.
Aptadir Therapeutics
Develops first-in-class demethylating medicines.
Cytospire Therapeutics
Develops novel therapies; 4BIO’s announcement frames it as a financing round for the company.
Undecimal Bio
Develops siRNA therapies beyond the liver.
- •Raising at Seed, Series A? You're squarely in their sweet spot.
- •Lead with your fit in Healthcare, SaaS — the sectors they actively back.
- •Size your ask to their typical $500K – $5.0M check.
- •warm intro preferred
- •Address your outreach to a specific partner, such as Dima Kuzmin, Managing Partner.
- •A warm introduction beats a cold email. Get matched and request an intro.
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