Company lists · Data refreshed September 2026

Top 25 Accounting firm merger integration consultants based in the United Kingdom

RevenueBase identified 361 company matches for accounting firm merger integration consultants associated with the United Kingdom as of September 2026 and tracks 7,920 professional contacts across them, including 1,716 with verified work emails. London is the largest hub.

This list covers company matches for accounting firm merger integration consultants associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 27, 2026 How this list was built
361Companies
7,920Contacts tracked
1,716Verified emails
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The 25 largest accounting firm merger integration consultants based in the United Kingdom

Ranked by team size
Top 25 of 361 company matches for accounting firm merger integration consultants based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 27, 202610001+3,630 contacts →

Exact match

“RSM is a leading global network of assurance, tax and consulting firms focused on the middle-market.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 27, 2026501-1,000702 contacts →

Exact match

“We are a fast-growing firm of accountants and business advisers based in London’s Canary Wharf, Leeds and in Manchester.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 27, 202610001+685 contacts →

Exact match

“Nexia is a leading worldwide network of independent accounting and consulting firms.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-200171 contacts →

Exact match

“Our pioneering integrated approach to professional services cuts through the complicated layers of the legal and accountancy world to give you straightforward joined-up advice and…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchManchester, United KingdomHQ recorded Sep 27, 2026201-500149 contacts →

Exact match

“Beever and Struthers has merged with Menzies LLP and is now part of one of the UK’s leading accountancy and advisory firms.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-50133 contacts →

Exact match

“Traditional accountants do a great job of the numbers, but that's often as far as the service goes.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchBanbury, United KingdomHQ recorded Sep 27, 202651-200120 contacts →

Exact match

“Ellacotts is one of the largest independent accounting and business advisory firms in the UK and is ranked as a Top 100 Accountancy Firm by Accountancy Age.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchManchester, United KingdomHQ recorded Sep 27, 2026501-1,00097 contacts →

Exact match

“K3 Capital Group is a professional services firm providing advisory services to SMEs throughout the UK and overseas.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchRochford, United KingdomHQ recorded Sep 27, 202611-5075 contacts →

Exact match

“Specialist recruitment, Mergers & Acquisitions advice and market intelligence, tailored to the Accounting and Legal sectors.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchChandlers Ford, United KingdomHQ recorded Sep 27, 202651-20070 contacts →

Exact match

“HWB is a leading firm of Chartered Accountants offering the depth of resource and specialist skills of a national practice.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 27, 2026201-50063 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchChichester, United KingdomHQ recorded Sep 27, 202651-20050 contacts →

Exact match

“At Lewis Brownlee, we're not just your average accountancy firm – we're the driving force behind your financial success.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchCardiff, United KingdomHQ recorded Sep 27, 202651-20045 contacts →

Exact match

“Now Operating Under a Unified Brand As of October 2024, we are proud to announce our rebranding as Carston ETL.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 27, 202651-20042 contacts →

Exact match

“You run an accountancy practice.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5040 contacts →

Exact match

“Warrener Stewart is a firm of chartered accountants, chartered tax advisors and registered auditors based in Fulham.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchElstree, United KingdomHQ recorded Sep 27, 202611-5038 contacts →

Exact match

“Why Do You Need a Proactive Accountant?”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,00038 contacts →

Exact match

“Integra International® is a global alliance of independent CPAs, CAs, Legal and Business Advisory firms that drive smart growth of their businesses by sharing knowledge and…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchGuildford, United KingdomHQ recorded Sep 27, 202611-5036 contacts →

Exact match

“Aristar Consulting was established in 2011 and has grown into a forward thinking, innovative accountancy firm that works hard to provide a quality, personal service for SME…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5032 contacts →

Exact match

“Wharton Business Consulting advises leaders on maximising value from their organisations, whether that be through post-merger integration, acquisition or transformation.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 27, 2026n/a32 contacts →

Exact match

“DD Consulting is a boutique consulting house specialising in M&A, integration and separation, taking all those skills into day-to-day business operations.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchSlough, United KingdomHQ recorded Sep 27, 202611-5030 contacts →

Exact match

“Asmat & Co are one of Berkshires leading independent firms of Accountants servicing a growing and satisfied clientele.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchEpsom, United KingdomHQ recorded Sep 27, 202611-5026 contacts →

Exact match

“Praxity is a leading global Alliance of independent accounting and consulting firms.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchBerkshire, United KingdomHQ recorded Sep 27, 202611-5023 contacts →

Exact match

“Kingsbrook was founded in 2015 by the Rebbettes family, the award-winning entrepreneurs behind M&A advisor BCMS, a former Coutts Family Business Of The Year.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 27, 202651-20021 contacts →

Exact match

“KNAV is a dynamic global accounting and consulting firm, offering a comprehensive range of services including accounting, assurance, taxation, international transfer pricing…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchStockton-on-tees, United KingdomHQ recorded Sep 27, 202611-5019 contacts →

Exact match

“Baines Jewitt formed following the 2004 merger of two firms who had long and proud histories in the North of England, and many of the key principles from these firms can be seen…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 361 accounting firm merger integration consultants based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,716 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Accounting firm merger integration consultants based in the United Kingdom at a glance

As of Sep 27, 2026
21.7%Verified-email coverage
21.9Average contacts per company
1-10Median size (employees)
36.6%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
218
11-50
102
51-200
24
201-500
7
501-1,000
2
1,001-5,000
3
10001+
3

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 361 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “accounting firm merger integration consultants” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 1,716 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “accounting firm merger integration consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many accounting firm merger integration consultants are there based in the United Kingdom?

RevenueBase identified 361 company matches for accounting firm merger integration consultants associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

RSM tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most accounting firm merger integration consultants?

London leads with 132 company records, followed by Birmingham (7) and Manchester (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,716 professional contacts with verified work emails tracked across these 361 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.