Company lists · Data refreshed September 2026
Top 23 Private equity infrastructure firms based in Stamford, United States
RevenueBase identified 31 private equity infrastructure firms headquartered in Stamford, United States as of September 2026 and tracks 1,053 professional contacts across them, including 578 with verified work emails. Across the United States, New York is the largest hub for this category (807 companies); Stamford has 31.
This list covers private equity infrastructure firms 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 private equity infrastructure firms based in Stamford, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 592 contacts → | ||||
Partial evidence “Castleton Commodities International is at the cutting edge of energy trading and infrastructure asset investing backed by the best minds in the industry and powered by deep…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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. | |||||
| 3 | 48 contacts → | ||||
Indirect evidence “Hudson Structured Capital Management Ltd.("HSCM") is an asset manager that deploys capital across two essential sectors - insurance and transportation - through specialized…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 43 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 38 contacts → | ||||
Partial 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. | |||||
| 6 | 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. | |||||
| 7 | 30 contacts → | ||||
Strong evidence “Jadian Capital is an alternative investment firm operating at the intersection of real estate, private equity and structured solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 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. | |||||
| 10 | 21 contacts → | ||||
Partial evidence “Discerene is a Connecticut-based private investment partnership which invests globally on behalf of several philosophically aligned institutions, pursuing a fundamental…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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. | |||||
| 12 | 17 contacts → | ||||
Indirect 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. | |||||
| 13 | 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. | |||||
| 14 | 13 contacts → | ||||
Strong evidence “Green Rock Energy Partners LLC is a sustainable infrastructure-focused private equity firm which invests in renewable energy companies and projects.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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. | |||||
| 16 | 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. | |||||
| 17 | 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. | |||||
| 18 | 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. | |||||
| 19 | 3 contacts → | ||||
Partial 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. | |||||
| 20 | 2 contacts → | ||||
Indirect evidence “Barrow Street Capital LLC is an investment management firm based in Stamford, Connecticut.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence “REI Capital Management is sponsoring two very different investment funds, both backed by hard assets and sold direct to consumers.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Strong evidence “Near Earth assists companies in raising capital in the private equity and debt markets.” 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: private equity infrastructure firms. 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 private equity infrastructure firms.
- Partial evidence
- Its own public description names part of private equity infrastructure firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name private equity infrastructure firms. 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 31 private equity infrastructure firms based in Stamford, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 578 reachable decision-makers.
Free signup · no credit card
Private equity infrastructure firms 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 31 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 infrastructure firms, 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 “private equity infrastructure firms”. 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 private equity infrastructure firms), 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 private equity infrastructure firms, 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, 578 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.
Private equity infrastructure firms by metro in the United States
- Private equity infrastructure firms in New York807
- Private equity infrastructure firms in Chicago252
- Private equity infrastructure firms in Dallas202
- Private equity infrastructure firms in Houston180
- Private equity infrastructure firms in Los Angeles164
- Private equity infrastructure firms in San Francisco146
- Private equity infrastructure firms in Miami141
- Private equity infrastructure firms in Boston132
- Private equity infrastructure firms in Austin130
- Private equity infrastructure firms in Atlanta96
- Private equity infrastructure firms in Denver86
- Private equity infrastructure firms in Charlotte61
- Private equity infrastructure firms in Washington47
- Private equity infrastructure firms in San Diego43
- Private equity infrastructure firms in Nashville41
- Private equity infrastructure firms in Newport Beach39
- Private equity infrastructure firms in Tampa39
- Private equity infrastructure firms in Philadelphia37
- Private equity infrastructure firms in New York City34
- Private equity infrastructure firms in Salt Lake City31
- Private equity infrastructure firms in Boca Raton30
- Private equity infrastructure firms in Cleveland30
- Private equity infrastructure firms in Beverly Hills29
- Private equity infrastructure firms in Birmingham29
- Private equity infrastructure firms in Seattle29
- Private equity infrastructure firms in Minneapolis28
- Private equity infrastructure firms in West Palm Beach28
- Private equity infrastructure firms in Scottsdale27
- Private equity infrastructure firms in Santa Monica25
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 private equity infrastructure firms, 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 private equity infrastructure firms are there based in Stamford, United States?
RevenueBase identified 31 private equity infrastructure firms 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?
Castleton Commodities International, headquartered in Stamford, tops this list with the largest team on record.
Which city in the United States has the most private equity infrastructure firms?
New York leads the United States with 807 headquartered companies, followed by Chicago (252) and Dallas (202). Stamford has 31.
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 578 verified decision-maker contacts tracked across these 31 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.
Ready to reach these companies? Verified emails and direct dials for all 31 private equity infrastructure firms based in Stamford, United States. Start with a free account, no credit card.
Download this list →Related lists
Private equity infrastructure firms by geography
- Private equity infrastructure firms based in Melbourne, Australia
- Private equity infrastructure firms based in Sydney, Australia
- Private equity infrastructure firms based in Sao Paulo, Brazil
- Private equity infrastructure firms based in Calgary, Canada
- Private equity infrastructure firms based in Montreal, Canada
- Private equity infrastructure firms based in Toronto, Canada
- Private equity infrastructure firms based in Vancouver, Canada
- Private equity infrastructure firms based in Helsinki, Finland
- Private equity infrastructure firms based in Paris, France
- Private equity infrastructure firms based in Berlin, Germany
- Private equity infrastructure firms based in Hamburg, Germany
- Private equity infrastructure firms based in Munich, Germany
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Private equity infrastructure firms based in Melbourne, Australia
- Private equity infrastructure firms based in Sydney, Australia
- Private equity infrastructure firms based in Sao Paulo, Brazil
- Private equity infrastructure firms based in Calgary, Canada
- Private equity infrastructure firms based in Montreal, Canada
- Private equity infrastructure firms based in Toronto, Canada