Company lists · Data refreshed September 2026

Top 25 Middle market investment firms worldwide

Name: Middle market investment firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 7,770 companies tracked

RevenueBase identified 7,770 middle market investment firms worldwide as of September 2026 and tracks 102,571 professional contacts across them, including 48,252 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers middle market investment 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 middle market investment 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

7,770Companies

102,571Contacts tracked

48,252Verified emails

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The 25 largest middle market investment firms worldwide

Ranked by team size

Top 25 of 7,770 middle market investment firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to middle market investment 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	The Carlyle Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,515 contacts →
	Partial evidence “Carlyle (NASDAQ: CG) is a global investment firm with deep industry expertise that deploys private capital across three business segments: Global Private Equity, Global Credit…” Source: RevenueBase Database · checked Sep 28, 2026
2	H.I.G. Capital	Indirect evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	501-1,000	1,301 contacts →
	Indirect evidence “H.I.G.” Source: RevenueBase Database · checked Sep 28, 2026
3	Warburg Pincus LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	1,290 contacts →
	Indirect evidence “Warburg Pincus LLC is the pioneer of global growth investing.” Source: RevenueBase Database · checked Sep 28, 2026
4	Golub Capital	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,126 contacts →
	Partial evidence “Golub Capital is a market-leading, award-winning direct lender and experienced private credit manager.” Source: RevenueBase Database · checked Sep 28, 2026
5	Advent	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	501-1,000	1,025 contacts →
	Indirect evidence “Advent is a leading global private equity investor committed to working in partnership with management teams, entrepreneurs, and founders to help transform businesses.” Source: RevenueBase Database · checked Sep 28, 2026
6	TA Associates	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	201-500	881 contacts →
	Indirect evidence “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Source: RevenueBase Database · checked Sep 28, 2026
7	Alantra	Strong evidence	Madrid, GermanyHQ checked Sep 28, 2026	501-1,000	697 contacts →
	Strong evidence “Alantra is an independent global financial services firm that provides investment banking and asset management services to mid-market companies, families, and investors.” Source: RevenueBase Database · checked Sep 28, 2026
8	Permira	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	629 contacts →
	Partial evidence “Permira is a global investment firm that backs successful businesses with growth ambitions.” Source: RevenueBase Database · checked Sep 28, 2026
9	Eurazeo	Partial evidence	Paris, GermanyHQ checked Sep 28, 2026	201-500	624 contacts →
	Partial evidence “Eurazeo is a leading global investment company, with a diversified portfolio of €40 billion in assets under management, including €31 billion from third parties, invested in 600…” Source: RevenueBase Database · checked Sep 28, 2026
10	Orix Corporation USA	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	613 contacts →
	Indirect evidence “Established in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
11	Bridgepoint Group	Partial evidence	West End, United KingdomHQ checked Sep 28, 2026	201-500	553 contacts →
	Partial evidence “Bridgepoint Group is one of the world's leading mid-market investors, specialising in private equity, infrastructure, credit, secondaries and private wealth.” Source: RevenueBase Database · checked Sep 28, 2026
12	PSG	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	513 contacts →
	Indirect evidence “PSG is a growth equity firm that partners with software and technology-enabled services companies to help them navigate transformational growth, capitalize on strategic…” Source: RevenueBase Database · checked Sep 28, 2026
13	Triton Partners	Partial evidence	LuxembourgHQ checked Sep 28, 2026	201-500	494 contacts →
	Partial evidence “Founded in 1997 and owned by its partners, Triton is a leading European mid-market sector-specialist investor.” Source: RevenueBase Database · checked Sep 28, 2026
14	Privet Capital LLP	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	469 contacts →
	Indirect evidence “We identify the hidden value in companies that are often in challenging or complex situations, but have a strong core offering.” Source: RevenueBase Database · checked Sep 28, 2026
15	Summit Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	465 contacts →
	Partial evidence “Summit Partners is a global alternative investment firm with capital dedicated to growth equity, fixed income, and public equity opportunities.” Source: RevenueBase Database · checked Sep 28, 2026
16	LA Trobe Financial	Indirect evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	501-1,000	457 contacts →
	Indirect evidence “Established in 1952, with $25 billion in assets under management, La Trobe Financial is Australia’s premier alternative asset manager, specialising in finance and credit…” Source: RevenueBase Database · checked Sep 28, 2026
17	The Riverside Company	Strong evidence	New York City, NY, United StatesHQ checked Sep 28, 2026	201-500	447 contacts →
	Strong evidence “The Riverside Company is a global investment firm focused on being one of the leading private capital options for business owners and employees at the smaller end of the middle…” Source: RevenueBase Database · checked Sep 28, 2026
18	Hillhouse Investment	Partial evidence	New York, SingaporeHQ checked Sep 28, 2026	201-500	447 contacts →
	Partial evidence “Hillhouse Investment is a long-term investor focused on partnering with quality business leaders to help them grow their organizations globally.” Source: RevenueBase Database · checked Sep 28, 2026
19	L Catterton	Strong evidence	Greenwich, CT, United KingdomHQ checked Sep 28, 2026	201-500	397 contacts →
	Strong evidence “L Catterton is a market-leading consumer-focused investment firm, managing approximately $39 billion of equity capital across three multi-product platforms: private equity…” Source: RevenueBase Database · checked Sep 28, 2026
20	Cd&r	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	385 contacts →
	Partial evidence “Founded in 1978, CD & R is an investment firm with an investment strategy predicated on building stronger, more profitable businesses.” Source: RevenueBase Database · checked Sep 28, 2026
21	Coller Capital	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	376 contacts →
	Partial evidence “Coller Capital, founded in 1990, is one of the world's leading investors in the secondary market for private assets – and widely acknowledged as an innovator in secondaries.” Source: RevenueBase Database · checked Sep 28, 2026
22	Adams Street Partners	Strong evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	367 contacts →
	Strong evidence “Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Source: RevenueBase Database · checked Sep 28, 2026
23	BLOOM	Partial evidence	SingaporeHQ checked Sep 28, 2026	n/a	360 contacts →
	Partial evidence “bloom.CAPITAL is an operationally-focused private equity firm that invests in small to mid-market companies in the industrial sector.” Source: RevenueBase Database · checked Sep 28, 2026
24	Novacap	Indirect evidence	Brossard, QC, CanadaHQ checked Sep 28, 2026	51-200	355 contacts →
	Indirect evidence “Novacap est un investisseur nord-américain d’envergure et l’une des sociétés d’investissement privé les plus expérimentées au Canada.” Source: RevenueBase Database · checked Sep 28, 2026
25	NEW Mountain Capital	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	346 contacts →
	Partial evidence “New Mountain Capital (“New Mountain”) is an alternative investment manager with private equity, credit and net lease strategies.” 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: middle market investment 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 middle market investment firms.
Partial evidence: Its own public description names part of middle market investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name middle market investment 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 7,770 middle market investment firms worldwide

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Middle market investment firms worldwide at a glance

As of Sep 28, 2026

47.0%Verified-email coverage

13.2Average contacts per company

1-10Median size (employees)

8.2%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

5,050

11-50

2,100

51-200

414

201-500

115

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 middle market investment 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 middle market investment firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “middle market investment 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 middle market investment 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 middle market investment 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, 48,252 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.

Middle market investment firms by location

55 lists · largest first

Every Middle market investment 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 middle market investment 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 middle market investment firms are there worldwide?

RevenueBase identified 7,770 middle market investment 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?

The Carlyle Group, headquartered in Washington, tops this list with the largest team on record.

Which country has the most middle market investment firms?

The United States leads with 4,178 companies, followed by the United Kingdom (364) and Canada (337). Every middle market investment firms list by country and city is linked on this page.

Which city has the most middle market investment firms?

New York leads with 635 headquartered companies, followed by London (275) and Chicago (216).

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 48,252 verified decision-maker contacts tracked across these 7,770 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.

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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.