Company lists · Data refreshed September 2026

Top 25 Add-on acquisition private equity firms worldwide

Name: Add-on acquisition private equity firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 9,360 companies tracked

RevenueBase identified 9,360 add-on acquisition private equity firms worldwide as of September 2026 and tracks 107,041 professional contacts across them, including 47,875 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers add-on acquisition 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 27, 2026. Country and city lists for add-on acquisition 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 27, 2026 86% judged on-target in blind review

9,360Companies

107,041Contacts tracked

47,875Verified emails

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The 25 largest add-on acquisition private equity firms worldwide

Ranked by team size

Top 25 of 9,360 add-on acquisition private equity firms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to add-on acquisition 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	The Carlyle Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 27, 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 27, 2026
2	H.I.G. Capital	Indirect evidence	Miami, FL, United StatesHQ checked Sep 27, 2026	501-1,000	1,301 contacts →
	Indirect evidence “H.I.G.” Source: RevenueBase Database · checked Sep 27, 2026
3	Warburg Pincus LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	501-1,000	1,290 contacts →
	Indirect evidence “Warburg Pincus LLC is the pioneer of global growth investing.” Source: RevenueBase Database · checked Sep 27, 2026
4	Advent	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
5	TA Associates	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
6	Vista Equity Partners	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 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 27, 2026
7	JV Driver Investments	Indirect evidence	Leduc, AB, CanadaHQ checked Sep 27, 2026	501-1,000	642 contacts →
	Indirect evidence “JV Driver Investments Inc.” Source: RevenueBase Database · checked Sep 27, 2026
8	Permira	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
9	Orix Corporation USA	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	1,001-5,000	613 contacts →
	Indirect evidence “Established in the U.S.” Source: RevenueBase Database · checked Sep 27, 2026
10	Carlson	Indirect evidence	Minnetonka, MN, United StatesHQ checked Sep 27, 2026	n/a	604 contacts →
	Indirect evidence “Carlson's roots are set in 1938, when Curtis L.” Source: RevenueBase Database · checked Sep 27, 2026
11	Platinum Equity	Partial evidence	Beverly Hills, CA, United StatesHQ checked Sep 27, 2026	201-500	577 contacts →
	Partial evidence “Founded in 1995 by Tom Gores, Platinum Equity is a global investment firm with approximately ~$48 billion of assets under management and a portfolio of approximately 60 operating…” Source: RevenueBase Database · checked Sep 27, 2026
12	Bridgepoint Group	Strong evidence	West End, United KingdomHQ checked Sep 27, 2026	201-500	553 contacts →
	Strong 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 27, 2026
13	PSG	Strong evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	51-200	513 contacts →
	Strong 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 27, 2026
14	Triton Partners	Indirect evidence	LuxembourgHQ checked Sep 27, 2026	201-500	494 contacts →
	Indirect evidence “Founded in 1997 and owned by its partners, Triton is a leading European mid-market sector-specialist investor.” Source: RevenueBase Database · checked Sep 27, 2026
15	Privet Capital LLP	Indirect evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
16	Summit Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 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 27, 2026
17	Northland	Strong evidence	Newton, MA, United StatesHQ checked Sep 27, 2026	501-1,000	464 contacts →
	Strong evidence “Northland is a real estate private equity firm with $8 billion of assets under management, including more than residential units and 1.3 million square feet of commercial space…” Source: RevenueBase Database · checked Sep 27, 2026
18	The Riverside Company	Strong evidence	New York City, NY, United StatesHQ checked Sep 27, 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 27, 2026
19	Hillhouse Investment	Partial evidence	New York, SingaporeHQ checked Sep 27, 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 27, 2026
20	APAX	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	438 contacts →
	Strong evidence “Apax Partners LLP ("Apax") is a global private equity advisory firm investing in mid-market businesses across the Technology, Services, and Internet/Consumer sectors.” Source: RevenueBase Database · checked Sep 27, 2026
21	JRK Property Holdings	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	411 contacts →
	Strong evidence “JRK Property Holdings is a Los Angeles–based real estate private equity firm founded in 1991 by James Lippman, Robert Rooney, and Keith Holmes.” Source: RevenueBase Database · checked Sep 27, 2026
22	L Catterton	Strong evidence	Greenwich, CT, United KingdomHQ checked Sep 27, 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 27, 2026
23	Cd&r	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 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 27, 2026
24	Perseus Group, Constellation Software	Indirect evidence	Markham, ON, CanadaHQ checked Sep 27, 2026	10001+	378 contacts →
	Indirect evidence “While other purchasers of business seek economies of scale through centralization, we have taken the opposite approach.” Source: RevenueBase Database · checked Sep 27, 2026
25	Coller Capital	Partial evidence	London, United KingdomHQ checked Sep 27, 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 27, 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: add-on acquisition 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 add-on acquisition private equity firms.
Partial evidence: Its own public description names part of add-on acquisition 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 add-on acquisition 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 9,360 add-on acquisition private equity firms worldwide

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Add-on acquisition private equity firms worldwide at a glance

As of Sep 27, 2026

44.7%Verified-email coverage

11.4Average contacts per company

1-10Median size (employees)

6.8%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

6,237

11-50

2,331

51-200

524

201-500

132

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 add-on acquisition 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 add-on acquisition private equity firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “add-on acquisition 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 add-on acquisition 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 add-on acquisition 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, 47,875 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 27, 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.

Add-on acquisition private equity firms by location

51 lists · largest first

Every Add-on acquisition 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 add-on acquisition 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 add-on acquisition private equity firms are there worldwide?

RevenueBase identified 9,360 add-on acquisition 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?

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

Which country has the most add-on acquisition private equity firms?

The United States leads with 4,584 companies, followed by the United Kingdom (524) and Canada (435). Every add-on acquisition private equity firms list by country and city is linked on this page.

Which city has the most add-on acquisition private equity firms?

New York leads with 636 headquartered companies, followed by London (363) and Chicago (247).

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 47,875 verified decision-maker contacts tracked across these 9,360 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 27, 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.