Accountancy group Dains has made its fourth acquisition since securing private equity backing last year.
It said the addition of Worcestershire outfit Curo would enhance its audit, tax, accounting and advisory capabilities.
Curo was founded in 2005 by Anna Madden and Julia Gallagher, who met while working together at another accountancy firm, and the pair will continue to lead the business post-completion from their base in Bromsgrove.
Terms of the deal were not disclosed.
Dains is headquartered on the Paradise estate in Birmingham city centre and has several bases in the Midlands including in Lichfield, Burton and Rugby alongside offices across the º£½ÇÊÓƵ and in Dublin.
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It took on investment from private equity house IK Partners at the end of last year since when it has also acquired Glasgow firm Consilium Chartered Accountants, Barnes Roffe in London and TBAT Innovation in Castle Donington last month.
Dains Group Richard McNeilly said: "Curo has built an outstanding reputation for technical excellence and long-standing client relationships.
"Its ability to deliver complex audits and cross-border tax work, while maintaining a highly personal approach, is rare in the market and complements our own strengths perfectly.
"By bringing our teams together, we're strengthening our ability to provide clarity and confidence to clients navigating complex challenges while extending the breadth of services and support available to them."
Ms Madden added: "When Julia and I founded Curo, our vision was to combine the technical standards of a 'big four' firm with the personal service and flexibility that clients truly value.
"Over the years, we've built long-lasting relationships and supported clients with increasingly complex and international needs.
"Joining the Dains Group allows us to continue that journey with greater scale and Resources while keeping the trusted relationships that sit at the heart of our firm."
Ms Gallagher said: "We are proud of the reputation Curo has earned for quality, expertise and client service.
"Becoming part of the Dains Group means our clients will benefit from an expanded range of services without losing the personal connection and continuity they rely on.
"We're excited to be working with a team that shares our values and commitment to helping clients succeed."
Advisors on the deal were Cyber Crowd, DSW, Mercia, PDW, Shakespeare Martineau and Transcend Corporate.
