Company lists · Data refreshed September 2026

Top 23 Upper middle market private equity firms based in Stamford, United States

Name: Upper middle market private equity firms based in Stamford, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 30 companies tracked

RevenueBase identified 30 company matches for upper middle market private equity firms associated with Stamford, United States as of September 2026 and tracks 447 professional contacts across them, including 277 with verified work emails. Across the United States, New York is the largest hub for this category (988 companies); Stamford has 30.

This list covers company matches for upper middle market private equity firms associated with Stamford, 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 21, 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 21, 2026 How this list was built

30Companies

447Contacts tracked

277Verified emails

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The 23 largest upper middle market private equity firms based in Stamford, United States

Ranked by team size

Top 23 of 30 company matches for upper middle market private equity firms based in Stamford, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	First Reserve	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	51-200	79 contacts →
	Exact match “Founded in 1983, First Reserve is a leading global private equity firm investing across energy, utility, and industrial markets.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	OAK HC FT	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	54 contacts →
	Exact match “Oak HC/FT is a venture and growth equity firm investing in companies driving transformation in healthcare and fintech, two uniquely complementary and high-growth sectors.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	MC Credit Partners LP	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	39 contacts →
	Exact match “MC Credit Partners LP ("MCCP") offers creative and comprehensive financing solutions to middle market companies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Clearview Capital, L.P	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	38 contacts →
	Exact match “Founded in Clearview Capital is a private investment firm specializing in the acquisition and recapitalization of lower-middle market companies in North America.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Avesi Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	30 contacts →
	Exact match “Avesi Partners is a private equity group that provides the expertise and resources to empower businesses to attain their full vision with confidence.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Gainline Capital Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	1-10	26 contacts →
	Exact match “Gainline Capital Partners is a private equity firm that invests in U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Olympus Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	23 contacts →
	Exact match “Founded in 1988, Olympus manages over $12.0 billion on behalf of corporate pension plans, public retirement systems, university endowment funds, and the executives of Olympus'…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Brookside Capital Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	17 contacts →
	Exact match “Brookside Capital Partners has invested over $1.5 billion across five funds since its founding in 2001.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Brooks, Houghton & Company, INC	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	17 contacts →
	Exact match “Brooks, Houghton & Company, Inc.("BHC") is a merchant banking firm dedicated to providing investment banking services and direct investment to middle market private and public…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Longrange Capital	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	17 contacts →
	Exact match “Founded in 2019, LongRange Capital was formed to take a longer-term perspective to investing and to build stronger and better middle market businesses through a company-focused…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Hamilton Robinson Capital Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	1-10	15 contacts →
	Exact match “Hamilton Robinson Capital Partners is a lower-middle market private equity firm focused on making control investments in North American-based commercial service, distribution…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Cohen Private Ventures, LLC	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	1-10	13 contacts →
	Exact match “Cohen Private Ventures invests long-term capital, primarily in direct private investments and other opportunistic transactions, on behalf of Steven A.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Garmark Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	12 contacts →
	Exact match “Founded in 1997, GarMark Partners is one of the longest-tenured managers of private junior debt and structured equity capital in North America, with approximately $1.3 billion of…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Broadview Real Estate Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	1-10	8 contacts →
	Exact match “Broadview Real Estate Partners is an opportunistic real estate investment business deploying capital primarily through real estate operating companies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Drum Capital Management, LLC	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	8 contacts →
	Exact match “Drum Capital Management is a specialized investment management firm dedicated to deep value lower middle market investment opportunities, including special situations, turnaround…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Brookside Equity Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	1-10	6 contacts →
	Exact match “With roots dating back 40 years, Brookside Equity Partners makes strategic private equity investments in middle-market companies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Waypoint Capital Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	6 contacts →
	Exact match “WayPoint is an operationally focused private equity firm purpose-built for the lower middle market with a family office heritage.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Compass Partners Capital, LLC	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	5 contacts →
	Exact match “Compass Partners brings elite experience and focus to help companies seize 21st century opportunities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Z2 Investment Management, LP	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	1-10	5 contacts →
	Exact match “Z2 is an SEC-registered alternative investment management company focused on non-sponsored, low to middle market direct lending.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Small Business Community Capital Sbcc	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	5 contacts →
	Exact match “Small Business Community Capital II (SBCC), is a private equity and private debt impact fund that invests in small and lower middle market companies through customized capital…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	The Cathay Funds	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	4 contacts →
	Exact match “The Cathay family of funds, managed by New China Capital Management, consists of five funds dedicated to direct investment in China with total invested capital of US$800 million.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Roar Capital	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	3 contacts →
	Exact match “Roar Capital focuses on lower middle market public and private opportunities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Centripetal Capital Partners	Exact match	Stamford, CT, United StatesHQ recorded Sep 21, 2026	11-50	1 contacts →
	Exact match “Centricap is a multi-stage venture capital firm with an innovative fund structure that provides greater flexibility and opportunity for limited partners than a traditional fund.” Recorded in the RevenueBase company graph · Sep 21, 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 “upper middle market private equity 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 23 of 30 upper middle market private equity firms based in Stamford, United States

See the full list, filter by size, metro and specialty, and access 277 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Upper middle market private equity firms based in Stamford, United States at a glance

As of Sep 21, 2026

62.0%Verified-email coverage

14.9Average contacts per company

11-50Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Stamford, so it is reported there. Company counts and contact totals on this page are exact for Stamford, over 30 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 Stamford, United States whose business descriptions match “upper middle market private equity 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 277 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 21, 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.

Upper middle market private equity firms by metro in the United States

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 “upper middle market private equity firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many upper middle market private equity firms are there based in Stamford, United States?

RevenueBase identified 30 company matches for upper middle market private equity firms associated with Stamford, 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?

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

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

New York leads the United States with 988 company records, followed by Chicago (333) and Dallas (294). Stamford has 30.

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 277 professional contacts with verified work emails tracked across these 30 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 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 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.