Company lists · Data refreshed September 2026
Top 23 Upper middle market private equity companies based in Stamford, United States
RevenueBase identified 30 upper middle market private equity companies headquartered in 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 (997 companies); Stamford has 30.
This list covers upper 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 23 largest upper middle market private equity companies based in Stamford, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 79 contacts → | ||||
Strong evidence “Founded in 1983, First Reserve is a leading global private equity firm investing across energy, utility, and industrial markets.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 54 contacts → | ||||
Partial evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 39 contacts → | ||||
Strong evidence “MC Credit Partners LP ("MCCP") offers creative and comprehensive financing solutions to middle market companies.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 38 contacts → | ||||
Strong evidence “Founded in Clearview Capital is a private investment firm specializing in the acquisition and recapitalization of lower-middle market companies in North America.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 30 contacts → | ||||
Strong evidence “Avesi Partners is a private equity group that provides the expertise and resources to empower businesses to attain their full vision with confidence.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 26 contacts → | ||||
Strong evidence “Gainline Capital Partners is a private equity firm that invests in U.S.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 23 contacts → | ||||
Indirect evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 17 contacts → | ||||
Indirect evidence “Brookside Capital Partners has invested over $1.5 billion across five funds since its founding in 2001.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 17 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 17 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 15 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 13 contacts → | ||||
Partial evidence “Cohen Private Ventures invests long-term capital, primarily in direct private investments and other opportunistic transactions, on behalf of Steven A.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 12 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 8 contacts → | ||||
Indirect evidence “Broadview Real Estate Partners is an opportunistic real estate investment business deploying capital primarily through real estate operating companies.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 8 contacts → | ||||
Strong evidence “Drum Capital Management is a specialized investment management firm dedicated to deep value lower middle market investment opportunities, including special situations, turnaround…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 contacts → | ||||
Strong evidence “With roots dating back 40 years, Brookside Equity Partners makes strategic private equity investments in middle-market companies.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Strong evidence “WayPoint is an operationally focused private equity firm purpose-built for the lower middle market with a family office heritage.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 contacts → | ||||
Indirect evidence “Compass Partners brings elite experience and focus to help companies seize 21st century opportunities.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 contacts → | ||||
Strong evidence “Z2 is an SEC-registered alternative investment management company focused on non-sponsored, low to middle market direct lending.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Strong evidence “Roar Capital focuses on lower middle market public and private opportunities.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: upper middle market private equity companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names upper middle market private equity companies.
- Partial evidence
- Its own public description names part of upper middle market private equity companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name upper middle market private equity companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 23 of 30 upper middle market private equity companies based in Stamford, United States
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Upper middle market private equity companies based in Stamford, United States at a glance
As of Sep 29, 2026Companies by employee count
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
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among upper middle market private equity companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “upper middle market private equity companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names upper middle market private equity companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among upper 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 its RevenueBase Smart Search 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, 277 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 29, 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.
Upper middle market private equity companies by metro in the United States
- Upper middle market private equity companies in New York997
- Upper middle market private equity companies in Chicago333
- Upper middle market private equity companies in Dallas294
- Upper middle market private equity companies in Los Angeles231
- Upper middle market private equity companies in Houston194
- Upper middle market private equity companies in Boston188
- Upper middle market private equity companies in Austin172
- Upper middle market private equity companies in San Francisco170
- Upper middle market private equity companies in Miami165
- Upper middle market private equity companies in Atlanta149
- Upper middle market private equity companies in Denver108
- Upper middle market private equity companies in Charlotte91
- Upper middle market private equity companies in Washington61
- Upper middle market private equity companies in Tampa53
- Upper middle market private equity companies in San Diego52
- Upper middle market private equity companies in Nashville51
- Upper middle market private equity companies in Newport Beach49
- Upper middle market private equity companies in Minneapolis48
- Upper middle market private equity companies in Seattle47
- Upper middle market private equity companies in Cleveland42
- Upper middle market private equity companies in Philadelphia40
- Upper middle market private equity companies in Birmingham37
- Upper middle market private equity companies in Salt Lake City37
- Upper middle market private equity companies in Boca Raton36
- Upper middle market private equity companies in Santa Monica35
- Upper middle market private equity companies in Beverly Hills33
- Upper middle market private equity companies in West Palm Beach33
- Upper middle market private equity companies in Phoenix32
- Upper middle market private equity companies in Scottsdale31
- Upper middle market private equity companies in Cincinnati30
- Upper middle market private equity companies in Las Vegas27
- Upper middle market private equity companies in Columbus26
- Upper middle market private equity companies in Fort Lauderdale26
- Upper middle market private equity companies in Orlando26
- Upper middle market private equity companies in Palo Alto26
- Upper middle market private equity companies in Indianapolis25
- Upper middle market private equity companies in Pittsburgh25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names upper middle market private equity companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many upper middle market private equity companies are there based in Stamford, United States?
RevenueBase identified 30 upper 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 in the United States has the most upper middle market private equity companies?
New York leads the United States with 997 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 277 verified decision-maker contacts tracked across these 30 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 29, 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 Smart Search, 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.
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