Company lists · Data refreshed September 2026

Top 25 Private equity portfolio companies based in the United States

Name: Private equity portfolio companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 6,095 companies tracked

RevenueBase identified 6,095 private equity portfolio companies headquartered in the United States as of September 2026 and tracks 81,047 professional contacts across them, including 40,332 with verified work emails and 35,891 with mobile numbers. New York is the largest hub.

This list covers private equity portfolio companies headquartered in the United States, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

6,095Companies

81,047Contacts tracked

40,332Verified emails

35,891Mobile numbers

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The 25 largest private equity portfolio companies based in the United States

Ranked by team size

Top 25 of 6,095 private equity portfolio companies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names private equity portfolio companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	The Carlyle GroupStrong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,515
	“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: company website · checked Sep 5, 2026
2	Bain CapitalPartial evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,068
	“Founded in 1984, Bain Capital is one of the world’s leading private investment firms.” Source: company website · checked Sep 5, 2026
3	H.I.G. CapitalIndirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	501-1,000	1,301
	“H.I.G.” Source: company website · checked Sep 5, 2026
4	Warburg Pincus LLCIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	1,290
	“Warburg Pincus LLC is the pioneer of global growth investing.” Source: company website · checked Sep 5, 2026
5	AdventStrong evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	501-1,000	1,025
	“Advent is a leading global private equity investor committed to working in partnership with management teams, entrepreneurs, and founders to help transform businesses.” Source: company website · checked Sep 5, 2026
6	ACCELPartial evidence	Palo Alto, CA, United StatesHQ checked Sep 5, 2026	n/a	981
	“Accel is a global venture capital firm that is the first partner to exceptional teams everywhere, from inception through all phases of private company growth.” Source: company website · checked Sep 5, 2026
7	TA AssociatesStrong evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	201-500	881
	“TA is a leading global private equity firm focused on scaling growth in profitable companies.” Source: company website · checked Sep 5, 2026
8	Vista Equity PartnersPartial evidence	Austin, TX, United StatesHQ checked Sep 5, 2026	501-1,000	839
	“Vista Equity Partners (Vista) is a leading global technology investor specializing in software.” Source: company website · checked Sep 5, 2026
9	General AtlanticIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	820
	“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: company website · checked Sep 5, 2026
10	Sixth StreetIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	501-1,000	802
	“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: company website · checked Sep 5, 2026
11	Platinum EquityStrong evidence	Beverly Hills, CA, United StatesHQ checked Sep 5, 2026	201-500	577
	“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: company website · checked Sep 5, 2026
12	PSGPartial evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	51-200	513
	“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: company website · checked Sep 5, 2026
13	Summit PartnersPartial evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	51-200	465
	“Summit Partners is a global alternative investment firm with capital dedicated to growth equity, fixed income, and public equity opportunities.” Source: company website · checked Sep 5, 2026
14	The Riverside CompanyPartial evidence	New York City, NY, United StatesHQ checked Sep 5, 2026	201-500	447
	“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: company website · checked Sep 5, 2026
15	Bessemer Venture PartnersIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	201-500	402
	“Bessemer Venture Partners helps entrepreneurs lay strong foundations from inception to build long-standing companies.” Source: company website · checked Sep 5, 2026
16	Sequoia CapitalIndirect evidence	Menlo Park, CA, United StatesHQ checked Sep 5, 2026	51-200	388
	“Sequoia helps daring founders build legendary companies from idea to IPO and beyond.” Source: company website · checked Sep 5, 2026
17	Cd&rIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	385
	“Founded in 1978, CD & R is an investment firm with an investment strategy predicated on building stronger, more profitable businesses.” Source: company website · checked Sep 5, 2026
18	Adams Street PartnersPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	201-500	367
	“Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Source: company website · checked Sep 5, 2026
19	W Capital PartnersStrong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	n/a	337
	“W Capital Partners is a private equity firm that provides secondary liquidity to shareholders in private businesses and growth capital for those companies.” Source: company website · checked Sep 5, 2026
20	Shore Capital PartnersStrong evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	51-200	327
	“Shore Capital, a Chicago-based private equity firm with an office in Nashville, is an investor in lower-middle market companies in the Healthcare, Food and Beverage, Business…” Source: company website · checked Sep 5, 2026
21	Thoma BravoIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	201-500	309
	“Thoma Bravo is the world’s largest software-focused investment firm, with more than $172 billion in assets under management as of March 31, 2026.” Source: company website · checked Sep 5, 2026
22	AMGIndirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 5, 2026	201-500	297
	“AMG is a leading partner to independent investment management firms globally.” Source: company website · checked Sep 5, 2026
23	York IEIndirect evidence	Manchester, NH, United StatesHQ checked Sep 5, 2026	201-500	292
	“York IE® is an investment and operating firm that combines a family of funds with a hands-on operating platform to build and back software companies.” Source: company website · checked Sep 5, 2026
24	Alpine InvestorsStrong evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	51-200	278
	“Alpine Investors is a people-driven private equity firm that invests in software and services businesses.” Source: company website · checked Sep 5, 2026
25	NEW Enterprise Associates NEAIndirect evidence	Menlo Park, CA, United StatesHQ checked Sep 5, 2026	51-200	277
	“New Enterprise Associates, Inc.(NEA) is a global venture capital firm focused on helping entrepreneurs build transformational businesses across multiple stages, sectors and…” Source: company website · checked Sep 5, 2026

Showing 25 of 6,095 private equity portfolio companies based in the United States

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Private equity portfolio companies based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 913 HQs

35,891Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

4,074

11-50

1,557

51-200

323

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

37,810

31–60

2,322

61–90

90–180

180+

150

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 private equity portfolio companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “private equity portfolio companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among private equity portfolio companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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 an evidence 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, 40,332 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 5, 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.

Private equity portfolio companies by metro

Frequently asked

How many private equity portfolio companies are there based in the United States?

RevenueBase identified 6,095 private equity portfolio companies headquartered in the United States 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 city has the most private equity portfolio companies?

New York leads with 913 headquartered companies, followed by Chicago (289) and San Francisco (230).

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 40,332 verified decision-maker contacts tracked across these 6,095 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 5, 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 SmartSearch, 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.