Company lists · Data refreshed September 2026

Top 25 Co-investment firms based in the United States

Name: Co-investment firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 6,360 companies tracked

RevenueBase identified 6,360 company matches for co-investment firms associated with the United States as of September 2026 and tracks 82,547 professional contacts across them, including 35,265 with verified work emails. New York is the largest hub.

This list covers company matches for co-investment firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 27, 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 RevenueBase SmartSearch · Exact Recorded Sep 27, 2026 How this list was built

6,360Companies

82,547Contacts tracked

35,265Verified emails

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The 25 largest co-investment firms based in the United States

Ranked by team size

Top 25 of 6,360 company matches for co-investment firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Citadel	Exact match	Miami, FL, United StatesHQ recorded Sep 27, 2026	1,001-5,000	4,261 contacts →
	Exact match “Our ambition at Citadel is to be the most successful investment firm of all time.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2	Nuveen, A Tiaa Company	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,940 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3	Bain Capital	Exact match	Boston, MA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	2,068 contacts →
	Exact match “Founded in 1984, Bain Capital is one of the world’s leading private investment firms.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4	IAC	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	5,001-10,000	1,615 contacts →
	Exact match “IAC builds companies.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5	Harbourvest Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,353 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6	Stepstone Group	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	1,001-5,000	1,323 contacts →
	Exact match “StepStone Group (Nasdaq: STEP) is a global private markets investment firm focused on providing customized investment solutions and advisory and data services to our clients.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7	H.I.G. Capital	Exact match	Miami, FL, United StatesHQ recorded Sep 27, 2026	501-1,000	1,301 contacts →
	Exact match “H.I.G.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8	Lasalle Investment Management	Exact match	Chicago, IL, United StatesHQ recorded Sep 27, 2026	501-1,000	985 contacts →
	Exact match “LaSalle is one of the world's leading investment managers.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9	TA Associates	Exact match	Boston, MA, United StatesHQ recorded Sep 27, 2026	201-500	881 contacts →
	Exact match “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10	Vista Equity Partners	Exact match	Austin, TX, United StatesHQ recorded Sep 27, 2026	501-1,000	839 contacts →
	Exact match “Vista Equity Partners (Vista) is a leading global technology investor specializing in software.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11	Orix Corporation USA	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	1,001-5,000	613 contacts →
	Exact match “Established in the U.S.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12	Carlson	Exact match	Minnetonka, MN, United StatesHQ recorded Sep 27, 2026	n/a	604 contacts →
	Exact match “Carlson's roots are set in 1938, when Curtis L.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13	Arrowstreet Capital, Limited Partnership	Exact match	Boston, MA, United StatesHQ recorded Sep 27, 2026	501-1,000	546 contacts →
	Exact match “Founded in Arrowstreet Capital is an independent private partnership based in Boston, Massachusetts.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14	Alumni Ventures	Exact match	Manchester, NH, United StatesHQ recorded Sep 27, 2026	51-200	411 contacts →
	Exact match “Founded in 2014, we’re America’s largest venture firm for individual investors and VC investing partner to over individuals and institutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15	Sequoia Capital	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 27, 2026	51-200	388 contacts →
	Exact match “Sequoia helps daring founders build legendary companies from idea to IPO and beyond.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16	Cd&r	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	51-200	385 contacts →
	Exact match “Founded in 1978, CD & R is an investment firm with an investment strategy predicated on building stronger, more profitable businesses.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17	Kayne Anderson	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 27, 2026	201-500	376 contacts →
	Exact match “Kayne Anderson, founded in 1984, is a leading alternative investment management firm focused on real estate, credit, infrastructure, and energy.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18	Centerbridge Partners, L.P	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	201-500	368 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19	Adams Street Partners	Exact match	Chicago, IL, United StatesHQ recorded Sep 27, 2026	201-500	367 contacts →
	Exact match “Adams Street Partners is a global investment firm managing a comprehensive suite of private markets investment solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20	CNL Financial Group	Exact match	Orlando, FL, United StatesHQ recorded Sep 27, 2026	201-500	364 contacts →
	Exact match “CNL Financial Group (CNL) is a leading private investment management firm providing alternative investments opportunities.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21	Scout Energy Partners	Exact match	Dallas, TX, United StatesHQ recorded Sep 27, 2026	501-1,000	362 contacts →
	Exact match “Scout Energy Partners Scout is a private investment firm, acquiring and operating energy assets for institutional partners.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22	W Capital Partners	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	n/a	337 contacts →
	Exact match “W Capital Partners is a private equity firm that provides secondary liquidity to shareholders in private businesses and growth capital for those companies.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23	AMG	Exact match	West Palm Beach, FL, United StatesHQ recorded Sep 27, 2026	201-500	297 contacts →
	Exact match “AMG is a leading partner to independent investment management firms globally.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24	York IE	Exact match	Manchester, NH, United StatesHQ recorded Sep 27, 2026	201-500	292 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25	Tiger Global	Exact match	New York, NY, United StatesHQ recorded Sep 27, 2026	51-200	275 contacts →
	Exact match “Tiger Global is a research-driven investment firm pursuing a long-term approach to partnering with high-quality, innovative companies across different stages of their lifecycle.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “co-investment firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 6,360 co-investment firms based in the United States

See the full list, filter by size, metro and specialty, and access 35,265 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Co-investment firms based in the United States at a glance

As of Sep 27, 2026

42.7%Verified-email coverage

13.0Average contacts per company

1-10Median size (employees)

15.5%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

4,546

11-50

1,435

51-200

277

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 6,360 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “co-investment firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 35,265 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Co-investment firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “co-investment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many co-investment firms are there based in the United States?

RevenueBase identified 6,360 company matches for co-investment firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Citadel tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most co-investment firms?

New York leads with 984 company records, followed by San Francisco (268) and Chicago (250).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 35,265 professional contacts with verified work emails tracked across these 6,360 companies; direct dials are available where recorded.

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 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.