
A confidential, invitation-only space where Oxfordshire’s senior leaders connect, think clearly, and tackle their biggest challenges with trusted peers.

Corum is B4’s next evolution in leadership — a private circle for senior leaders who want more than networking. Built from the momentum of OBS2025, Corum unites a curated group of CEOs and business owners committed to stronger leadership, clearer thinking and deeper collaboration.
Corum is designed exclusively for the individuals at the top of an organisation — one representative per business, no substitutes. It is a confidential environment where leaders can speak openly, test ideas, share challenges and gain insight from peers who genuinely understand the pressures of leading.
Every Corum member is invited or approved to ensure alignment of ethos, ambition and integrity. Members come from some of Oxfordshire’s most respected organisations, creating a high-calibre, purpose-driven community that elevates every conversation.
Corum events take place in Oxfordshire’s most inspiring spaces — from heritage settings to modern private meeting rooms. These intimate roundtables and leader talks are designed for strategic depth, honest dialogue and practical problem-solving.
Corum focuses on real issues: growth challenges, culture, people, innovation, risk, governance and responsible leadership. It is a space for leaders who want to think bigger, act with purpose and help strengthen Oxfordshire’s business landscape.
If you are a leader who values discretion, depth, high-quality relationships and genuine challenge — Corum has been designed for you. Join the circle shaping what comes next. See more in the brochure below.