Company lists · Data refreshed September 2026

Top 21 Middle market private equity companies based in Stamford, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 28 companies tracked

RevenueBase identified 28 middle market private equity companies headquartered in Stamford, United States as of September 2026 and tracks 442 professional contacts across them, including 275 with verified work emails. New York is the largest hub.

This list covers middle market private equity companies headquartered in Stamford, 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

28Companies

442Contacts tracked

275Verified emails

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The 21 largest middle market private equity companies based in Stamford, United States

Ranked by team size

Top 21 of 28 middle market private equity companies based in Stamford, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names middle market private equity 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	First ReserveStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	51-200	79
	“Founded in 1983, First Reserve is a leading global private equity firm investing across energy, utility, and industrial markets.” Source: company website · checked Sep 5, 2026
2	OAK HC FTPartial evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	54
	“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.” Source: company website · checked Sep 5, 2026
3	MC Credit Partners LPStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	39
	“MC Credit Partners LP ("MCCP") offers creative and comprehensive financing solutions to middle market companies.” Source: company website · checked Sep 5, 2026
4	Clearview Capital, L.PStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	38
	“Founded in Clearview Capital is a private investment firm specializing in the acquisition and recapitalization of lower-middle market companies in North America.” Source: company website · checked Sep 5, 2026
5	Avesi PartnersStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	30
	“Avesi Partners is a private equity group that provides the expertise and resources to empower businesses to attain their full vision with confidence.” Source: company website · checked Sep 5, 2026
6	Gainline Capital PartnersStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	26
	“Gainline Capital Partners is a private equity firm that invests in U.S.” Source: company website · checked Sep 5, 2026
7	Olympus PartnersIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	23
	“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'…” Source: company website · checked Sep 5, 2026
8	Brookside Capital PartnersIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	17
	“Brookside Capital Partners has invested over $1.5 billion across five funds since its founding in 2001.” Source: company website · checked Sep 5, 2026
9	Brooks, Houghton & Company, INCStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	17
	“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…” Source: company website · checked Sep 5, 2026
10	Longrange CapitalStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	17
	“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…” Source: company website · checked Sep 5, 2026
11	Hamilton Robinson Capital PartnersStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	15
	“Hamilton Robinson Capital Partners is a lower-middle market private equity firm focused on making control investments in North American-based commercial service, distribution…” Source: company website · checked Sep 5, 2026
12	Cohen Private Ventures, LLCPartial evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	13
	“Cohen Private Ventures invests long-term capital, primarily in direct private investments and other opportunistic transactions, on behalf of Steven A.” Source: company website · checked Sep 5, 2026
13	Garmark PartnersStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	12
	“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…” Source: company website · checked Sep 5, 2026
14	Broadview Real Estate PartnersIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	8
	“Broadview Real Estate Partners is an opportunistic real estate investment business deploying capital primarily through real estate operating companies.” Source: company website · checked Sep 5, 2026
15	Drum Capital Management, LLCStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	8
	“Drum Capital Management is a specialized investment management firm dedicated to deep value lower middle market investment opportunities, including special situations, turnaround…” Source: company website · checked Sep 5, 2026
16	Brookside Equity PartnersStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	6
	“With roots dating back 40 years, Brookside Equity Partners makes strategic private equity investments in middle-market companies.” Source: company website · checked Sep 5, 2026
17	Waypoint Capital PartnersStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	6
	“WayPoint is an operationally focused private equity firm purpose-built for the lower middle market with a family office heritage.” Source: company website · checked Sep 5, 2026
18	Compass Partners Capital, LLCIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	5
	“Compass Partners brings elite experience and focus to help companies seize 21st century opportunities.” Source: company website · checked Sep 5, 2026
19	Z2 Investment Management, LPStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	5
	“Z2 is an SEC-registered alternative investment management company focused on non-sponsored, low to middle market direct lending.” Source: company website · checked Sep 5, 2026
20	Small Business Community Capital SbccStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	5
	“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…” Source: company website · checked Sep 5, 2026
21	Roar CapitalStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	3
	“Roar Capital focuses on lower middle market public and private opportunities.” Source: company website · checked Sep 5, 2026

Showing 21 of 28 middle market private equity companies based in Stamford, United States

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Middle market private equity companies based in Stamford, United States at a glance

As of Sep 5, 2026

11-50Median size (employees)

New YorkLargest hub · 911 HQs

Contacts with mobile numbers

Sep 5, 2026Data 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 this city, so it is reported there. Company counts and contact totals on this page are exact for Stamford, over 28 companies.

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 middle market private equity 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 Stamford, United States whose own description of what they do matches “middle market private equity 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 middle market private equity companies, and records with no verified work email. Companies headquartered outside Stamford 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, 275 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.

Middle market private equity companies by metro in the United States

Frequently asked

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

RevenueBase identified 28 middle market private equity companies headquartered in Stamford, 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?

First Reserve, headquartered in Stamford, tops this list with the largest team on record.

Which city has the most middle market private equity companies?

New York leads with 911 headquartered companies, followed by Chicago (317) and Dallas (276).

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 275 verified decision-maker contacts tracked across these 28 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.