Existing non-executive director, Bridget Rosewell, will be taking over the helm of the Durham-based lender, subject to regulatory approval.
“Since having the idea for Atom bank in early 2012, it has gone from being a big idea disguised as a small bank to a big idea and a big bank,” said Thomson in a statement.
“I am an entrepreneur and champion of the customer first and foremost. I specialize in disrupting, creating and building and I hope this will be my contribution to the Atom Bank story. I have loved doing this with Atom but, as the bank moves into a new phase of development, I feel the time is right for me to step down from the role of chairman.”
Since founding Atom in 2014, Thomson has lead the business through gaining approval for a banking license and raising over £250m in capital. The bank continues to hold a top 10 position in KPMG’s global fintech rankings, as it has done continuously for the last three years.
As its founder Thomson will remain a shareholder of Atom, and plans to spend his 2018 travelling. According to reports from Sky News, the reshuffle is scheduled for after it closes a £150m fundraise, underwritten by existing investor BBVA. The funding round will take the bank's total raised sum to £400m.
Speaking about Thomson's decision, new chairman Bridget Rosewell said: “It is with regret but also great admiration that the Board have accepted his resignation, and I and my colleagues fully understand his reasons for leaving having brought the business to maturity and achieved so much so quickly.”
Atom CEO Mark Muller added: “Without Anthony there would be no Atom bank. His skill, experience and entrepreneurial drive have shaped and driven the business from its earliest incarnation.
“At the same time I am delighted to have the chance to work even more closely with Bridget Rosewell as the new Chair of Atom bank. Bridget has been an active and engaged member of our Board from the beginning of Atom bank. In addition to huge experience of UK banking, Bridget brings a zest for analytics and innovation as well a deep and diverse expertise of delivery in both the public and private sectors.“