Series C first close · Biotech

Microbiotica closes £36m Series C first tranche for ulcerative colitis programme

British Business Bank leads the financing as MB310 prepares for a larger clinical study.

Testing the early clinical signal

The financing follows the COMPOSER-1 Phase 1b study, which the company says met its primary and secondary endpoints. The planned randomised, placebo-controlled Phase 2 trial will test whether those early findings hold in a larger study.

All existing Series B investors joined the first close. Microbiotica’s approach uses clinical microbiome data to select therapeutic bacteria, and it is also developing a separate programme for advanced melanoma.

Use of funds

Advance MB310 into Phase2 clinical development for ulcerative colitis

Funding history

Series C first close · This round£36M

Sources

  1. Microbiotica financing announcementglobenewswire.com · Oct 16, 2026