Alliotts employs 14 partners and 100 people between its offices in Guildford and London, offering a full range of accountancy services.
The firm’s specialist teams also advise on business strategy and corporate finance, with a strong media team and China desk among its niche offerings.
It now joins the Shaw Gibbs Group, headquartered in Oxford and with offices nationwide.
Stephen Meredith, chair of Alliotts, said: “With the ever-growing complexity of reporting and regulation, it is important we have access to the expertise required to keep ahead of change and the systems and back-office support to continue to deliver a cost-efficient all-round service.
“For our clients, it is very much business as usual.
“They will not see any difference in who we are or how we work, but we now have more resource behind us to ensure we can continue to deliver outstanding service for years to come.”
Peter O’Connell, CEO for Shaw Gibbs, added: “Alliotts ‘finesse-led’ approach is clear in the way that they run their business, their approach to ESG and the great emphasis they place on understanding their clients individual and business needs.
“By joining forces with Alliotts, we are bringing together two firms with a shared vision of delivering exceptional service and treating our people, our stakeholders and each other with respect.
“They bring an impressive experienced senior team to the Shaw Gibbs Group, and I look forward to working with them.”
The Shaw Gibbs Group now represents a practice of almost 500 people, with offices in Oxford, Basingstoke, Bristol, Farnham, Guildford, Liss, London, Sutton, Teddington, Thame, Northampton and Winchester.