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 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 merger integration consulting firms worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. 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 Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

25,052Companies

207,756Contacts tracked

63,997Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest merger integration consulting firms worldwide

Ranked by team size

Top 25 of 25,052 merger integration consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to merger integration consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Wavestone	Partial evidence	100-101 Terrasse Boieldieu, FranceHQ checked Sep 28, 2026	1,001-5,000	6,190 contacts →
	Partial evidence “Wavestone is a leading consulting firm operating at the intersection of business and technology.” Source: RevenueBase Database · checked Sep 28, 2026
2	Accenture Strategy & Consulting	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	5,001-10,000	5,514 contacts →
	Indirect evidence “Accenture Strategy combines deep industry expertise, advanced analytics capabilities and human-led design methodologies that enable clients to act with speed and confidence.” Source: RevenueBase Database · checked Sep 28, 2026
3	KCA Deutag	Indirect evidence	Portlethen, United KingdomHQ checked Sep 28, 2026	10001+	4,109 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
4	Alixpartners	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,583 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
5	Monitor Deloitte	Indirect evidence	United StatesHQ checked Sep 28, 2026	5,001-10,000	3,116 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
6	Arthur D. Little	Indirect evidence	Brussels, BelgiumHQ checked Sep 28, 2026	1,001-5,000	2,186 contacts →
	Indirect evidence “As people, organizations and societies embrace change at pace, its leaders must anticipate, innovate and transform ever faster.” Source: RevenueBase Database · checked Sep 28, 2026
7	Baringa	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	2,179 contacts →
	Partial evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 28, 2026
8	North Highland	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,792 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
9	JLT Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	1,361 contacts →
	Indirect evidence “As of April 1, 2019, JLT Group is now part of Marsh & McLennan Companies (MMC).” Source: RevenueBase Database · checked Sep 28, 2026
10	Trace3	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,345 contacts →
	Indirect evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 28, 2026
11	Riveron	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,160 contacts →
	Indirect evidence “With over 1,200 professionals across 18 international offices, Riveron delivers tailored solutions for CFOs, private equity firms, and key stakeholders.” Source: RevenueBase Database · checked Sep 28, 2026
12	W3global	Partial evidence	Frisco, TX, United StatesHQ checked Sep 28, 2026	501-1,000	1,149 contacts →
	Partial evidence “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Source: RevenueBase Database · checked Sep 28, 2026
13	The Brandt Companies	Partial evidence	Carrollton, TX, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,120 contacts →
	Partial evidence “On January 1, 2026, The Brandt Companies completed its merger with Southland Industries.” Source: RevenueBase Database · checked Sep 28, 2026
14	Oc&c Strategy Consultants	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	1,011 contacts →
	Indirect evidence “At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.” Source: RevenueBase Database · checked Sep 28, 2026
15	Porsche Consulting	Indirect evidence	Stuttgart, GermanyHQ checked Sep 28, 2026	501-1,000	988 contacts →
	Indirect evidence “As a leading consultancy for putting strategies into practice, we have a clear mission: we generate competitive advantage on the basis of measurable results.” Source: RevenueBase Database · checked Sep 28, 2026
16	Eight Advisory	Partial evidence	Paris, FranceHQ checked Sep 28, 2026	501-1,000	895 contacts →
	Partial evidence “Eight Advisory, Europe's leading independent advisory firm specialising in financial, operational and strategy consulting, is involved in transactions, restructuring and…” Source: RevenueBase Database · checked Sep 28, 2026
17	The Liro Group	Partial evidence	Syosset, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	874 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
18	Locke Lord LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	830 contacts →
	Partial evidence “Locke Lord and Troutman Pepper merged on January 1, 2025.” Source: RevenueBase Database · checked Sep 28, 2026
19	The Vertex Companies LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	765 contacts →
	Partial evidence “The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…” Source: RevenueBase Database · checked Sep 28, 2026
20	Visiativ	Indirect evidence	Lyon, FranceHQ checked Sep 28, 2026	1,001-5,000	750 contacts →
	Indirect evidence “Through innovation and digitalisation, Visiativ delivers smarter ways of working that help businesses become more agile, efficient and collaborative.” Source: RevenueBase Database · checked Sep 28, 2026
21	Square Management	Indirect evidence	Neuilly Sur Seine, FranceHQ checked Sep 28, 2026	501-1,000	719 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
22	Mobilecomm Professionals, INC	Indirect evidence	Richardson, TX, United StatesHQ checked Sep 28, 2026	501-1,000	706 contacts →
	Indirect evidence “MobileComm is now fully integrated with UST.” Source: RevenueBase Database · checked Sep 28, 2026
23	デロイトトーマツコンサルティング(合同)	Partial evidence	千代田区, JapanHQ checked Sep 28, 2026	501-1,000	696 contacts →
	Partial evidence “is a management consulting company based out of, Japan.” Source: RevenueBase Database · checked Sep 28, 2026
24	Hunton & Williams LLP	Indirect evidence	Richmond, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	668 contacts →
	Indirect evidence “On April 2, 2018, Hunton & Williams LLP and Andrews Kurth Kenyon LLP combined to become Hunton Andrews Kurth LLP.” Source: RevenueBase Database · checked Sep 28, 2026
25	Daugherty Business Solutions	Partial evidence	St Louis, MO, United StatesHQ checked Sep 28, 2026	1,001-5,000	657 contacts →
	Partial evidence “Daugherty Business Solutions is now part of CGI (CGI.com), a global IT and business consulting services firm.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: merger integration consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names merger integration consulting firms.
Partial evidence: Its own public description names part of merger integration consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name merger integration consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 25,052 merger integration consulting firms worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 63,997 reachable decision-makers.

Free signup · no credit card

View the full list →

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among merger integration consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, 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: Companies worldwide whose own description of what they do matches “merger integration consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names merger integration consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among merger integration consulting firms, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 63,997 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Merger integration consulting firms by location

125 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names merger integration consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many merger integration consulting firms are there worldwide?

RevenueBase identified 25,052 merger integration consulting firms worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Wavestone, headquartered in La Defense, tops this list with the largest team on record.

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 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 63,997 verified decision-maker contacts tracked across these 25,052 companies.

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.

Ready to reach these companies? Verified emails and direct dials for all 25,052 merger integration consulting firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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 Smart Search, 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.