Company lists · Data refreshed September 2026

Top 25 Transaction support companies worldwide

Name: Transaction support companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 4,218 companies tracked

RevenueBase identified 4,218 transaction support companies worldwide as of September 2026 and tracks 30,457 professional contacts across them, including 10,790 with verified work emails. The United States is the largest market and Paris the largest hub.

This list covers transaction support companies 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 21, 2026. Country and city lists for transaction support companies 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 21, 2026 86% judged on-target in blind review

4,218Companies

30,457Contacts tracked

10,790Verified emails

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The 25 largest transaction support companies worldwide

Ranked by team size

Top 25 of 4,218 transaction support companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to transaction support companies: 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	Riveron	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 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 21, 2026
2	WIPRO	Indirect evidence	Valencia, SpainHQ checked Sep 21, 2026	n/a	1,097 contacts →
	Indirect evidence “En Wipro impulsamos el progreso.” Source: RevenueBase Database · checked Sep 21, 2026
3	Bancard	Indirect evidence	Asunción, ParaguayHQ checked Sep 21, 2026	201-500	429 contacts →
	Indirect evidence “Misión “Proveer servicios transaccionales y de medios de pago electrónico con flexibilidad, seguridad y calidad, generando valor percibido para accionistas, colaboradores y…” Source: RevenueBase Database · checked Sep 21, 2026
4	Solomon Partners	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	427 contacts →
	Indirect evidence “Solomon Partners is a leading investment bank – one of the first independent firms in the industry.” Source: RevenueBase Database · checked Sep 21, 2026
5	Clearwater	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	384 contacts →
	Indirect evidence “Clearwater is an independent corporate finance house focused on unlocking the latent potential in every business.” Source: RevenueBase Database · checked Sep 21, 2026
6	Sellside Group, LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	51-200	339 contacts →
	Indirect evidence “Selling a business is one of the most important financial decisions you'll ever make.” Source: RevenueBase Database · checked Sep 21, 2026
7	Nihon M&a Center INC	Indirect evidence	千代田区, JapanHQ checked Sep 21, 2026	1,001-5,000	291 contacts →
	Indirect evidence “M & am & m&a m&a” Source: RevenueBase Database · checked Sep 21, 2026
8	Capstone Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	51-200	276 contacts →
	Indirect evidence “For over 20 years, Capstone Partners has been a trusted advisor to leading middle market companies, offering a fully integrated range of investment banking and financial advisory…” Source: RevenueBase Database · checked Sep 21, 2026
9	Williamsmarston	Partial evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	201-500	259 contacts →
	Partial evidence “WilliamsMarston is a national leader in complex accounting, tax, technology, transaction and valuation advisory services.” Source: RevenueBase Database · checked Sep 21, 2026
10	Rbsa Advisors	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	201-500	246 contacts →
	Partial evidence “RBSA Advisors, formed in 1971, is a Leading independent Transaction Advisory firm that provides Valuation, Investment Banking, Restructuring, Due Diligence, Transaction Tax, Risk…” Source: RevenueBase Database · checked Sep 21, 2026
11	Generational Group	Indirect evidence	Richardson, TX, United StatesHQ checked Sep 21, 2026	201-500	228 contacts →
	Indirect evidence “Since its beginning in 2005, Generational Group has grown to be one of the leading M&A firms in North America.” Source: RevenueBase Database · checked Sep 21, 2026
12	Oderis Consulting	Strong evidence	Paris, FranceHQ checked Sep 21, 2026	51-200	211 contacts →
	Strong evidence “Oderis provides specialized transaction and operational support and related services to a wide range of corporate and private equity clients since 2006.” Source: RevenueBase Database · checked Sep 21, 2026
13	Livingstone	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	51-200	207 contacts →
	Indirect evidence “Livingstone is an international mid-market M&A and debt advisory firm with offices in Amsterdam, Beijing, Chicago, Düsseldorf, Frankfurt, Hamburg, London, Los Angeles, Madrid…” Source: RevenueBase Database · checked Sep 21, 2026
14	Sltconsult Contabilidade E Gestão Empresarial	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 21, 2026	201-500	194 contacts →
	Indirect evidence “Na SLT, somos um time composto por mais de 200 profissionais altamente capacitados, especializados em transformar estratégias em resultados tangíveis.” Source: RevenueBase Database · checked Sep 21, 2026
15	Dpo&co.	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	51-200	187 contacts →
	Indirect evidence “DPO & Co specializes in helping Private Equity firms and their portfolio companies gain fact-based insights during the diligence process and realize post-close synergies and value…” Source: RevenueBase Database · checked Sep 21, 2026
16	Clairfield International	Indirect evidence	Geneva, United KingdomHQ checked Sep 21, 2026	201-500	159 contacts →
	Indirect evidence “Clairfield International is an independent, international corporate finance partnership that provides advisory services to clients across an array of industries.” Source: RevenueBase Database · checked Sep 21, 2026
17	MCF Corporate Finance	Indirect evidence	Hamburg, GermanyHQ checked Sep 21, 2026	51-200	140 contacts →
	Indirect evidence “MCF Corporate Finance (MCF) is a leading M&A and debt advisory firm with offices in Frankfurt, Hamburg, Helsinki, London, Munich and Stockholm.” Source: RevenueBase Database · checked Sep 21, 2026
18	Corum Group LTD	Indirect evidence	Bothell, WA, United StatesHQ checked Sep 21, 2026	11-50	139 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
19	Private Client & CO	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	n/a	135 contacts →
	Partial evidence “Transaction Advisory Private Client & Co.” Source: RevenueBase Database · checked Sep 21, 2026
20	Proman Imap Finland	Partial evidence	Helsinki, FinlandHQ checked Sep 21, 2026	n/a	125 contacts →
	Partial evidence “ProMan is one of the leading corporate finance advisory firms focusing on mid-market transactions in Finland and internationally.” Source: RevenueBase Database · checked Sep 21, 2026
21	Valustrat	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	51-200	122 contacts →
	Indirect evidence “Strategy Determines Outcome.” Source: RevenueBase Database · checked Sep 21, 2026
22	Athens	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	122 contacts →
	Partial evidence “Athens helps clients make superior investment decisions and supports them to deliver value from these decisions through timely implementation.” Source: RevenueBase Database · checked Sep 21, 2026
23	Heartman House Consultores	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	51-200	121 contacts →
	Indirect evidence “Consulting Firm focuse on corporate restructuring, strategic planning and pos-merger integration.” Source: RevenueBase Database · checked Sep 21, 2026
24	CDI Global M&a	Partial evidence	Chicago, United StatesHQ checked Sep 21, 2026	51-200	118 contacts →
	Partial evidence “CDI Global, established in 1973, is a leader in middle-market, cross-border transactions with over transactions to our credit.” Source: RevenueBase Database · checked Sep 21, 2026
25	Global PMI Partners	Partial evidence	London, United StatesHQ checked Sep 21, 2026	201-500	113 contacts →
	Partial evidence “Global PMI Partners is a specialist consulting firm supporting our listed company and private equity clients with their M&A integrations, divestments and operational…” Source: RevenueBase Database · checked Sep 21, 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: transaction support companies. 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 transaction support companies.
Partial evidence: Its own public description names part of transaction support companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transaction support companies. 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 4,218 transaction support companies worldwide

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Transaction support companies worldwide at a glance

As of Sep 21, 2026

35.4%Verified-email coverage

7.2Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · Paris

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

3,104

11-50

894

51-200

152

201-500

501-1,000

1,001-5,000

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 transaction support companies, 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 transaction support companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “transaction support companies”. 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 transaction support companies), 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 transaction support companies, 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, 10,790 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 21, 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.

Transaction support companies by location

26 lists · largest first

Every Transaction support companies 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 transaction support companies, 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 transaction support companies are there worldwide?

RevenueBase identified 4,218 transaction support companies 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?

Riveron, headquartered in Dallas, tops this list with the largest team on record.

Which country has the most transaction support companies?

The United States leads with 1,052 companies, followed by France (281) and Brazil (238). Every transaction support companies list by country and city is linked on this page.

Which city has the most transaction support companies?

Paris leads with 128 headquartered companies, followed by London (125) and Sao Paulo (125).

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 10,790 verified decision-maker contacts tracked across these 4,218 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 21, 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 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.