Company lists · Data refreshed September 2026

Top 25 Private equity backed companies based in Stamford, United States

Name: Private equity backed 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 35 companies tracked

RevenueBase identified 35 private equity backed companies headquartered in Stamford, United States as of September 2026 and tracks 544 professional contacts across them, including 328 with verified work emails. New York is the largest hub.

This list covers private equity backed 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

35Companies

544Contacts tracked

328Verified emails

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The 25 largest private equity backed companies based in Stamford, United States

Ranked by team size

Top 25 of 35 private equity backed 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 private equity backed 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	Atlantic-Pacific CapitalStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	43
	“Since its founding in 1995, Atlantic-Pacific Capital has organically grown into a global organization with an established brand in the private equity community.” Source: company website · checked Sep 5, 2026
4	Clearview Capital, L.PPartial 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	BraidwellPartial evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	34
	“Braidwell is a life science-focused investment firm dedicated to building and backing companies that transform human health.” Source: company website · checked Sep 5, 2026
6	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
7	Jadian CapitalStrong evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	30
	“Jadian Capital is an alternative investment firm operating at the intersection of real estate, private equity and structured solutions.” Source: company website · checked Sep 5, 2026
8	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
9	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
10	Discerene Group LPPartial evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	21
	“Discerene is a Connecticut-based private investment partnership which invests globally on behalf of several philosophically aligned institutions, pursuing a fundamental…” Source: company website · checked Sep 5, 2026
11	Fifth Season InvestmentsIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	19
	“Fifth Season Investments is a portfolio company of certain Owl Rock BDCs, which are externally managed by indirect subsidiaries of Blue Owl Capital Inc.” Source: company website · checked Sep 5, 2026
12	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
13	Longrange CapitalIndirect 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
14	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
15	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
16	Galen PartnersIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	11-50	13
	“Galen Partners is a leading healthcare venture capital firm based in Stamford, Connecticut.” Source: company website · checked Sep 5, 2026
17	Parkman Healthcare Partners LLCIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	12
	“Parkman Healthcare Partners is a healthcare-focused investment firm based in Stamford, CT.” Source: company website · checked Sep 5, 2026
18	Drum Capital Management, LLCIndirect 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
19	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
20	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
21	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
22	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
23	Roar CapitalPartial 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
24	Blue Door Asset ManagementPartial evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	3
	“Blue Door is a private investment firm founded in 2018.” Source: company website · checked Sep 5, 2026
25	Barrow Street Capital LLCIndirect evidence	Stamford, CT, United StatesHQ checked Sep 5, 2026	1-10	2
	“Barrow Street Capital LLC is an investment management firm based in Stamford, Connecticut.” Source: company website · checked Sep 5, 2026

Showing 25 of 35 private equity backed companies based in Stamford, United States

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Private equity backed companies based in Stamford, United States at a glance

As of Sep 5, 2026

11-50Median size (employees)

New YorkLargest hub · 1145 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 35 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 private equity backed 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 “private equity backed 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 backed 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, 328 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 backed companies by metro in the United States

Frequently asked

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

RevenueBase identified 35 private equity backed 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 private equity backed companies?

New York leads with 1145 headquartered companies, followed by Chicago (384) and Dallas (336).

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 328 verified decision-maker contacts tracked across these 35 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.