Company lists · Data refreshed September 2026

Top 25 Merger integration consulting firms worldwide

Name: Merger integration consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 25,052 companies tracked

RevenueBase identified 25,052 company matches for merger integration consulting firms worldwide as of September 2026 and tracks 207,756 professional contacts across them, including 63,997 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for merger integration consulting firms worldwide, 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 28, 2026. Country and city lists for merger integration consulting firms follow the table.

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 28, 2026 How this list was built

25,052Companies

207,756Contacts tracked

63,997Verified emails

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The 25 largest merger integration consulting firms worldwide

Ranked by team size

Top 25 of 25,052 company matches for merger integration consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Wavestone	Exact match	100-101 Terrasse Boieldieu, FranceHQ recorded Sep 28, 2026	1,001-5,000	6,190 contacts →
	Exact match “Wavestone is a leading consulting firm operating at the intersection of business and technology.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Accenture Strategy & Consulting	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	5,001-10,000	5,514 contacts →
	Exact match “Accenture Strategy combines deep industry expertise, advanced analytics capabilities and human-led design methodologies that enable clients to act with speed and confidence.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	KCA Deutag	Exact match	Portlethen, United KingdomHQ recorded Sep 28, 2026	10001+	4,109 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Alixpartners	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	3,583 contacts →
	Exact match “For more than forty years, AlixPartners has helped businesses around the world respond quickly and decisively to their most critical challenges – circumstances as diverse as…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Monitor Deloitte	Exact match	United StatesHQ recorded Sep 28, 2026	5,001-10,000	3,116 contacts →
	Exact match “To navigate the future with confidence, organizations need to make and act upon the right choices: clear, timely and inspirational choices that deliver growth in a dynamic…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Arthur D. Little	Exact match	Brussels, BelgiumHQ recorded Sep 28, 2026	1,001-5,000	2,186 contacts →
	Exact match “As people, organizations and societies embrace change at pace, its leaders must anticipate, innovate and transform ever faster.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Baringa	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	2,179 contacts →
	Exact match “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	North Highland	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,792 contacts →
	Exact match “North Highland helps businesses move from strategy to reality, taking a pragmatic and practical approach to build solutions that work and create impact that lasts.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	JLT Group	Exact match	London, United KingdomHQ recorded Sep 28, 2026	n/a	1,361 contacts →
	Exact match “As of April 1, 2019, JLT Group is now part of Marsh & McLennan Companies (MMC).” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Trace3	Exact match	Irvine, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,345 contacts →
	Exact match “Trace3 delivers business transformation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Riveron	Exact match	Dallas, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,160 contacts →
	Exact match “With over 1,200 professionals across 18 international offices, Riveron delivers tailored solutions for CFOs, private equity firms, and key stakeholders.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	W3global	Exact match	Frisco, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	1,149 contacts →
	Exact match “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	The Brandt Companies	Exact match	Carrollton, TX, United StatesHQ recorded Sep 28, 2026	5,001-10,000	1,120 contacts →
	Exact match “On January 1, 2026, The Brandt Companies completed its merger with Southland Industries.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Oc&c Strategy Consultants	Exact match	London, United KingdomHQ recorded Sep 28, 2026	501-1,000	1,011 contacts →
	Exact match “At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Porsche Consulting	Exact match	Stuttgart, GermanyHQ recorded Sep 28, 2026	501-1,000	988 contacts →
	Exact match “As a leading consultancy for putting strategies into practice, we have a clear mission: we generate competitive advantage on the basis of measurable results.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Eight Advisory	Exact match	Paris, FranceHQ recorded Sep 28, 2026	501-1,000	895 contacts →
	Exact match “Eight Advisory, Europe's leading independent advisory firm specialising in financial, operational and strategy consulting, is involved in transactions, restructuring and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	The Liro Group	Exact match	Syosset, NY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	874 contacts →
	Exact match “The LiRo Group and Hill International’s Northeast Region have merged to become LiRo-Hill, upholding the firms’ strong, long-standing reputations as leaders in the field, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Locke Lord LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	830 contacts →
	Exact match “Locke Lord and Troutman Pepper merged on January 1, 2025.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	The Vertex Companies LLC	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	765 contacts →
	Exact match “The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Visiativ	Exact match	Lyon, FranceHQ recorded Sep 28, 2026	1,001-5,000	750 contacts →
	Exact match “Through innovation and digitalisation, Visiativ delivers smarter ways of working that help businesses become more agile, efficient and collaborative.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Square Management	Exact match	Neuilly Sur Seine, FranceHQ recorded Sep 28, 2026	501-1,000	719 contacts →
	Exact match “Square Management est un cabinet de conseil spécialisé en stratégie et organisation qui accompagne ses clients dans l’anticipation, la conception et la réalisation de leurs…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Mobilecomm Professionals, INC	Exact match	Richardson, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	706 contacts →
	Exact match “MobileComm is now fully integrated with UST.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	デロイトトーマツコンサルティング(合同)	Exact match	千代田区, JapanHQ recorded Sep 28, 2026	501-1,000	696 contacts →
	Exact match “is a management consulting company based out of, Japan.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Hunton & Williams LLP	Exact match	Richmond, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	668 contacts →
	Exact match “On April 2, 2018, Hunton & Williams LLP and Andrews Kurth Kenyon LLP combined to become Hunton Andrews Kurth LLP.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Daugherty Business Solutions	Exact match	St Louis, MO, United StatesHQ recorded Sep 28, 2026	1,001-5,000	657 contacts →
	Exact match “Daugherty Business Solutions is now part of CGI (CGI.com), a global IT and business consulting services firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “merger integration consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 25,052 merger integration consulting firms worldwide

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Merger integration consulting firms worldwide at a glance

As of Sep 28, 2026

30.8%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

18,908

11-50

4,773

51-200

962

201-500

213

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for merger integration consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “merger integration consulting firms” 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. 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 63,997 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 28, 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.

Merger integration consulting firms by location

126 lists · largest first

Every Merger integration consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “merger integration consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many merger integration consulting firms are there worldwide?

RevenueBase identified 25,052 company matches for merger integration consulting firms worldwide 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?

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

Which country has the most merger integration consulting firms?

The United States leads with 6,158 companies, followed by France (1,315) and the United Kingdom (1,300). Every merger integration consulting firms list by country and city is linked on this page.

Which city has the most merger integration consulting firms?

London leads with 600 company records, followed by Paris (491) and Sao Paulo (398).

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 63,997 professional contacts with verified work emails tracked across these 25,052 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 28, 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.