Company lists · Data refreshed September 2026

Top 25 Infrastructure equity firms based in Boston, United States

Name: Infrastructure equity firms based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 42 companies tracked

RevenueBase identified 42 infrastructure equity firms headquartered in Boston, United States as of September 2026 and tracks 2,176 professional contacts across them, including 1,036 with verified work emails. New York is the largest hub.

This list covers infrastructure equity firms headquartered in Boston, 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 20, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

42Companies

2,176Contacts tracked

1,036Verified emails

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The 25 largest infrastructure equity firms based in Boston, United States

Ranked by team size

Top 25 of 42 infrastructure equity firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure equity firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	TA Associates	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	881 contacts →
	Partial evidence “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Source: RevenueBase Database · checked Sep 20, 2026
2	Berkshire Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	255 contacts →
	Partial evidence “Berkshire Partners is a 100% employee-owned, multi-sector specialist investor in private and public equity, with a focus on North American-based, middle-market companies.” Source: RevenueBase Database · checked Sep 20, 2026
3	Charlesbank Capital Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	236 contacts →
	Indirect evidence “Based in Boston and New York City, Charlesbank is a leading middle-market private investment firm with $21.5 billion in assets under management as of 3/31/2026.” Source: RevenueBase Database · checked Sep 20, 2026
4	Unison Infrastructure	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	122 contacts →
	Partial evidence “Unison acquires and manages infrastructure assets across a variety of different verticals.” Source: RevenueBase Database · checked Sep 20, 2026
5	Great Hill Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	110 contacts →
	Partial evidence “Founded in 1998, Great Hill Partners is a private equity firm targeting investments of $100 million to $750 million in high-growth companies across the software, financial…” Source: RevenueBase Database · checked Sep 20, 2026
6	Advanced Power	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	92 contacts →
	Partial evidence “Advanced Power is a privately owned company that develops, owns, and manages modern power generation and related infrastructure projects throughout Europe and North America.” Source: RevenueBase Database · checked Sep 20, 2026
7	Arclight Capital Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	79 contacts →
	Partial evidence “ArcLight is a leading infrastructure investor which has been investing in critical electrification infrastructure since its founding in 2001.” Source: RevenueBase Database · checked Sep 20, 2026
8	Copley Equity Partners LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	42 contacts →
	Partial evidence “Copley Equity Partners is a private investment firm based in Boston, MA, and Denver, CO.” Source: RevenueBase Database · checked Sep 20, 2026
9	Solamere Capital, LLC	Partial evidence	Boston, United StatesHQ checked Sep 20, 2026	11-50	37 contacts →
	Partial evidence “Founded in 2008, Solamere is a multi-strategy private equity firm with offices in Boston and New York City.” Source: RevenueBase Database · checked Sep 20, 2026
10	Venture Guides	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	36 contacts →
	Partial evidence “Venture Guides is an early-stage infrastructure software investment firm with a unique team based approach that has resulted in over 80% of portfolio companies generating positive…” Source: RevenueBase Database · checked Sep 20, 2026
11	Union Park Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	n/a	31 contacts →
	Partial evidence “Union Park Capital is a private equity investment firm focused solely on lower middle-market Industrial Technology companies.” Source: RevenueBase Database · checked Sep 20, 2026
12	JMH Capital Partners, LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	27 contacts →
	Partial evidence “JMH CAPITAL PARTNERS is a generalist private equity firm that acquires profitable businesses in North America with revenues of $5 million to $100 million.” Source: RevenueBase Database · checked Sep 20, 2026
13	M C Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	22 contacts →
	Strong evidence “M/C Partners is a private equity firm focused on small and mid-size businesses in the digital infrastructure and technology services sectors.” Source: RevenueBase Database · checked Sep 20, 2026
14	Hastings Equity Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “Founded in 2004, Hastings Equity Partners is a lower middle-market private equity firm.” Source: RevenueBase Database · checked Sep 20, 2026
15	Dubin Clark & Company, INC	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “Established in 1984, Dubin Clark is a private equity firm that focuses on strategic and operational value creation and seeks to acquire interest in Branded Niche Manufacturing…” Source: RevenueBase Database · checked Sep 20, 2026
16	Clarus Capital	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “Clarus Capital is a private credit firm specializing in delivering efficient capital solutions to finance tangible assets for sponsor-backed borrowers.” Source: RevenueBase Database · checked Sep 20, 2026
17	Bayhawk Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “BayHawk Capital is a Boston-based private equity firm dedicated to partnering with founder-owned technology and essential services businesses, investing $25 to $150 million of…” Source: RevenueBase Database · checked Sep 20, 2026
18	Wincove Private Holdings	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	15 contacts →
	Partial evidence “At Wincove, we elevate private equity through a blend of tradition and innovation.” Source: RevenueBase Database · checked Sep 20, 2026
19	Building Industry Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	15 contacts →
	Partial evidence “Building Industry Partners (“BIP”) is the leading private equity investment firm focused on the U.S.” Source: RevenueBase Database · checked Sep 20, 2026
20	Watermill Group	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Watermill Group is a private investing firm that leads with strategy.” Source: RevenueBase Database · checked Sep 20, 2026
21	Boardwalk	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	10 contacts →
	Indirect evidence “Boardwalk is a private firm that offers liquidity to small business owners who may also seek transition of day-to-day management.” Source: RevenueBase Database · checked Sep 20, 2026
22	Cohere Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	9 contacts →
	Partial evidence “Cohere Capital is a growth focused private equity firm that invests in leading middle-market businesses.” Source: RevenueBase Database · checked Sep 20, 2026
23	LLM Capital Partners LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “LLM Capital Partners LLC makes growth equity investments in middle market companies.” Source: RevenueBase Database · checked Sep 20, 2026
24	Caste Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	9 contacts →
	Partial evidence “A real estate private equity firm focused on affordable housing in New England.” Source: RevenueBase Database · checked Sep 20, 2026
25	Landon Capital Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	6 contacts →
	Partial evidence “Landon Capital Partners ("LCP") is a US lower-middle-market private equity firm backed by global family office investors.” Source: RevenueBase Database · checked Sep 20, 2026

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: infrastructure equity 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 infrastructure equity firms.
Partial evidence: Its own public description names part of infrastructure equity firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure equity 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 25 of 42 infrastructure equity firms based in Boston, United States

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Infrastructure equity firms based in Boston, United States at a glance

As of Sep 20, 2026

47.6%Verified-email coverage

51.8Average contacts per company

11-50Median size (employees)

509.5%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Boston, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 42 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 infrastructure equity 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 Boston, United States whose own description of what they do matches “infrastructure equity 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 infrastructure equity 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 infrastructure equity firms, and records with no verified work email. Companies headquartered outside Boston 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, 1,036 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 20, 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.

Infrastructure equity firms by metro in the United States

Infrastructure equity firms in New York214
Infrastructure equity firms in Houston72
Infrastructure equity firms in Chicago68
Infrastructure equity firms in Dallas57
Infrastructure equity firms in Miami47
Infrastructure equity firms in Boston42
Infrastructure equity firms in Los Angeles42
Infrastructure equity firms in San Francisco39
Infrastructure equity firms in Austin30
Infrastructure equity firms in Atlanta29
Infrastructure equity firms in Denver28
Infrastructure equity firms in Washington28

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 infrastructure equity 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 infrastructure equity firms are there based in Boston, United States?

RevenueBase identified 42 infrastructure equity firms headquartered in Boston, 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?

TA Associates, headquartered in Boston, tops this list with the largest team on record.

Which city has the most infrastructure equity firms?

New York leads with 214 headquartered companies, followed by Houston (72) and Chicago (68).

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 1,036 verified decision-maker contacts tracked across these 42 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 20, 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.