Atom Holdco plc (“the Company”), the holding company of the Atom Group including Atom Bank plc (“Atom”) today announces that founder and Chief Executive Officer (“CEO”) Mark Mullen, has decided to step down as CEO of the Company from 4 September 2026. Andrew Marshall, the Company’s Chief Financial Officer, will assume the role of Interim CEO. Mark will be available to support Andrew and the Company until the end of the year. The Board will be initiating a market search to appoint a successor. An announcement of a permanent appointment will be made in due course.
Chair, Lee Rochford, commented:
“On behalf of the Board, I would like to thank Mark for his leadership, dedication and significant contributions since he founded the business 12 years ago. Under his leadership, Atom pioneered digital banking in the UK. His vision of an online bank devoted to customer service has been adopted across the industry and helped make Atom one of the UK’s most trusted banks for customers. That is a legacy to be proud of.
The Board has agreed with Mark that now is the right time for new leadership to shape and drive the next phase of Atom’s growth.
I am delighted that Andrew Marshall has agreed to serve as Interim CEO, and I look forward to working with him as we continue to deliver on our priorities.”
Mark Mullen said:
“After 12 years as CEO, I have decided to hand over the leadership of Atom. It has been a privilege to build this business and I am immensely proud of what we have achieved together, growing Atom into a leading UK bank that successfully competes with the High Street banks.
Atom is a fantastic company with a bright future. I wish Andrew and my permanent successor well.”
Andrew Marshall said:
“I am pleased to take on the role of Interim CEO and to lead Atom after 10 years with the business. Mark leaves us with a strong foundation and an excellent team, and I look forward to working with the Board and leadership team to maintain our momentum.
My focus will be on delivering for customers and progressing the opportunities ahead of us.”
