Company lists · Data refreshed September 2026

Top 25 Upper middle market private equity firms worldwide

Name: Upper middle market private equity firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 14,609 companies tracked

RevenueBase identified 14,609 upper middle market private equity firms worldwide as of September 2026 and tracks 194,686 professional contacts across them, including 85,066 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers upper middle market private equity 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 21, 2026. Country and city lists for upper middle market private equity 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 21, 2026 86% judged on-target in blind review

14,609Companies

194,686Contacts tracked

85,066Verified emails

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The 25 largest upper middle market private equity firms worldwide

Ranked by team size

Top 25 of 14,609 upper middle market private equity firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to upper middle market private equity 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	Ares Management	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,975 contacts →
	Indirect evidence “Ares Management Corporation (NYSE: ARES) is a leading global alternative investment manager offering clients complementary primary and secondary investment solutions across the…” Source: RevenueBase Database · checked Sep 21, 2026
2	Brookfield	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,915 contacts →
	Indirect evidence “We are a leading global investment firm that invests as long-term owners on behalf of institutions and individuals worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
3	Nuveen, A Tiaa Company	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,940 contacts →
	Partial evidence “Nuveen is a global investment leader, managing public and private assets for clients around the world and on behalf of TIAA, our parent company and one of the world’s largest…” Source: RevenueBase Database · checked Sep 21, 2026
4	The Carlyle Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,515 contacts →
	Strong 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 21, 2026
5	Partners Group	Strong evidence	Baar, SwitzerlandHQ checked Sep 21, 2026	1,001-5,000	2,149 contacts →
	Strong evidence “Partners Group is a global private markets firm with USD 186 billion in assets under management and c.” Source: RevenueBase Database · checked Sep 21, 2026
6	Bain Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,068 contacts →
	Partial evidence “Founded in 1984, Bain Capital is one of the world’s leading private investment firms.” Source: RevenueBase Database · checked Sep 21, 2026
7	TPG	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,979 contacts →
	Indirect evidence “TPG (Nasdaq: TPG) is a leading global alternative asset management firm, founded in San Francisco in 1992, with $306 billion of assets under management and investment and…” Source: RevenueBase Database · checked Sep 21, 2026
8	Algihaz Holding	Indirect evidence	Riyadh, Saudi ArabiaHQ checked Sep 21, 2026	10001+	1,740 contacts →
	Indirect evidence “Algihaz Holding is a Saudi Arabian investment group that has emerged as a leading organization since 1975.” Source: RevenueBase Database · checked Sep 21, 2026
9	Ardian	Indirect evidence	Paris, FranceHQ checked Sep 21, 2026	1,001-5,000	1,624 contacts →
	Indirect evidence “In a world of constant evolution, Ardian stands out for its ability to anticipate, adapt, and turn challenges into opportunities.” Source: RevenueBase Database · checked Sep 21, 2026
10	Harbourvest Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,353 contacts →
	Strong evidence “HarbourVest is an independent, global private markets firm with over 43 years of experience and $161 billion assets under management as of December 31, 2025.” Source: RevenueBase Database · checked Sep 21, 2026
11	H.I.G. Capital	Indirect evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	501-1,000	1,301 contacts →
	Indirect evidence “H.I.G.” Source: RevenueBase Database · checked Sep 21, 2026
12	Warburg Pincus LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	1,290 contacts →
	Indirect evidence “Warburg Pincus LLC is the pioneer of global growth investing.” Source: RevenueBase Database · checked Sep 21, 2026
13	Golub Capital	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,126 contacts →
	Strong evidence “Golub Capital is a market-leading, award-winning direct lender and experienced private credit manager.” Source: RevenueBase Database · checked Sep 21, 2026
14	Advent	Strong evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	501-1,000	1,025 contacts →
	Strong 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 21, 2026
15	Itautec	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	1,001-5,000	998 contacts →
	Indirect evidence “A Itautec faz parte do Grupo Itaúsa - Investimentos Itaú S.A.” Source: RevenueBase Database · checked Sep 21, 2026
16	TA Associates	Strong evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	201-500	881 contacts →
	Strong evidence “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Source: RevenueBase Database · checked Sep 21, 2026
17	Vista Equity Partners	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	501-1,000	839 contacts →
	Partial evidence “Vista Equity Partners (Vista) is a leading global technology investor specializing in software.” Source: RevenueBase Database · checked Sep 21, 2026
18	General Atlantic	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	820 contacts →
	Indirect evidence “General Atlantic is a leading global investor with more than four and a half decades of experience providing capital and strategic support to over 830 companies throughout its…” Source: RevenueBase Database · checked Sep 21, 2026
19	Sixth Street	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	802 contacts →
	Indirect evidence “Sixth Street is a global investment firm with over $135 billion in assets under management and committed capital.* The firm uses its long-term flexible capital, data-enabled…” Source: RevenueBase Database · checked Sep 21, 2026
20	ICG	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	797 contacts →
	Indirect evidence “ICG (LSE: ICG) is a global alternative asset manager with $126bn* in AUM and more than three decades of experience generating attractive returns.” Source: RevenueBase Database · checked Sep 21, 2026
21	ALGER	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	n/a	722 contacts →
	Indirect evidence “Founded in 1964, Alger is recognized as a pioneer of growth-style investment management.” Source: RevenueBase Database · checked Sep 21, 2026
22	Starwood Capital Group	Partial evidence	United StatesHQ checked Sep 21, 2026	1,001-5,000	710 contacts →
	Partial evidence “Starwood Capital Group is a private investment firm with a primary focus on global real estate.” Source: RevenueBase Database · checked Sep 21, 2026
23	Alantra	Partial evidence	Madrid, GermanyHQ checked Sep 21, 2026	501-1,000	697 contacts →
	Partial 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 21, 2026
24	JV Driver Investments	Indirect evidence	Leduc, AB, CanadaHQ checked Sep 21, 2026	501-1,000	642 contacts →
	Indirect evidence “JV Driver Investments Inc.” Source: RevenueBase Database · checked Sep 21, 2026
25	Permira	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	501-1,000	629 contacts →
	Indirect evidence “Permira is a global investment firm that backs successful businesses with growth ambitions.” 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: upper middle market private equity 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 upper middle market private equity firms.
Partial evidence: Its own public description names part of upper middle market private equity firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name upper middle market private equity 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 14,609 upper middle market private equity firms worldwide

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Upper middle market private equity firms worldwide at a glance

As of Sep 21, 2026

43.7%Verified-email coverage

13.3Average contacts per company

1-10Median size (employees)

6.6%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

9,591

11-50

3,730

51-200

831

201-500

225

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 upper middle market private equity 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 upper middle market private equity firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “upper middle market private equity 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 upper middle market private equity 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 upper middle market private equity 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, 85,066 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.

Upper middle market private equity firms by location

77 lists · largest first

Every Upper middle market private equity 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 upper middle market private equity 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 upper middle market private equity firms are there worldwide?

RevenueBase identified 14,609 upper middle market private equity 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?

Ares Management, headquartered in Los Angeles, tops this list with the largest team on record.

Which country has the most upper middle market private equity firms?

The United States leads with 6,670 companies, followed by the United Kingdom (820) and Canada (633). Every upper middle market private equity firms list by country and city is linked on this page.

Which city has the most upper middle market private equity firms?

New York leads with 958 headquartered companies, followed by London (591) and Chicago (333).

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 85,066 verified decision-maker contacts tracked across these 14,609 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.