Company lists · Data refreshed September 2026

Top 25 Lower middle market pe firms based in Boston, United States

Name: Lower middle market pe 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 113 companies tracked

RevenueBase identified 113 lower middle market pe firms headquartered in Boston, United States as of September 2026 and tracks 4,619 professional contacts across them, including 2,223 with verified work emails. New York is the largest hub.

This list covers lower middle market pe 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

113Companies

4,619Contacts tracked

2,223Verified emails

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The 25 largest lower middle market pe firms based in Boston, United States

Ranked by team size

Top 25 of 113 lower middle market pe 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 lower middle market pe 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	Advent	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	501-1,000	1,025 contacts →
	Indirect evidence “Advent is a leading global private equity investor committed to working in partnership with management teams, entrepreneurs, and founders to help transform businesses.” Source: RevenueBase Database · checked Sep 20, 2026
2	TA Associates	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	881 contacts →
	Indirect evidence “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Source: RevenueBase Database · checked Sep 20, 2026
3	PSG	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	513 contacts →
	Indirect evidence “PSG is a growth equity firm that partners with software and technology-enabled services companies to help them navigate transformational growth, capitalize on strategic…” Source: RevenueBase Database · checked Sep 20, 2026
4	Berkshire Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	255 contacts →
	Strong 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
5	Charlesbank Capital Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	236 contacts →
	Strong 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
6	Audax Private Equity	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	211 contacts →
	Indirect evidence “Headquartered in Boston, with offices in San Francisco, New York, London and Hong Kong, Audax Private Equity is a leading private equity platform focused on investing across the…” Source: RevenueBase Database · checked Sep 20, 2026
7	THL Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	148 contacts →
	Strong evidence “THL Partners is a Boston-based private equity firm investing in middle-market growth companies in three industry groups: Financial Technology & Services, Healthcare, and…” Source: RevenueBase Database · checked Sep 20, 2026
8	Great Hill Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	110 contacts →
	Indirect 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
9	Spectrum Equity	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	94 contacts →
	Indirect evidence “Founded in 1994, Spectrum Equity is a leading growth equity firm with offices in Boston, San Francisco, and London.” Source: RevenueBase Database · checked Sep 20, 2026
10	Parthenon Capital	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	68 contacts →
	Indirect evidence “Parthenon Capital Partners (“Parthenon” or “Parthenon Capital”) is a private equity firm that partners with and invests in management teams and their companies.” Source: RevenueBase Database · checked Sep 20, 2026
11	Silversmith Capital Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	63 contacts →
	Indirect evidence “Founded in 2015, Silversmith Capital Partners is a Boston-based growth equity firm with over $5 billion in capital under management.” Source: RevenueBase Database · checked Sep 20, 2026
12	Volition Capital	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	63 contacts →
	Indirect evidence “Volition Capital is a growth equity firm established in 2010 that focuses on investing in high-growth, founder-owned technology businesses across the U.S.” Source: RevenueBase Database · checked Sep 20, 2026
13	Cove Hill Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	53 contacts →
	Partial evidence “Cove Hill Partners is a private equity firm focused on partnering with outstanding management teams to build market-leading technology and consumer companies.” Source: RevenueBase Database · checked Sep 20, 2026
14	Ampersand Capital Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	45 contacts →
	Strong evidence “Founded in 1988, Ampersand is a middle-market private equity firm with $3 billion of assets under management dedicated to growth-oriented investments in the healthcare sector.” Source: RevenueBase Database · checked Sep 20, 2026
15	Copley Equity Partners LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	42 contacts →
	Indirect evidence “Copley Equity Partners is a private investment firm based in Boston, MA, and Denver, CO.” Source: RevenueBase Database · checked Sep 20, 2026
16	Solamere Capital, LLC	Indirect evidence	Boston, United StatesHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect 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
17	Conjoin Group	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	36 contacts →
	Indirect evidence “The ConJoin Group aligns with Venture Capital and Private Equity firms by investing our own capital,$250M in committed funds, and delivering a suite of services designed to…” Source: RevenueBase Database · checked Sep 20, 2026
18	Riverside Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	32 contacts →
	Strong evidence “Founded in 1989, Riverside Partners is a Boston-based middle market private equity firm currently investing Riverside Fund VI, L.P.” Source: RevenueBase Database · checked Sep 20, 2026
19	Union Park Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	n/a	31 contacts →
	Strong 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
20	Sverica Capital Management	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	27 contacts →
	Strong evidence “Sverica Capital Management LP is a leading growth-oriented lower middle market private equity firm with $2.2 billion in aggregate committed capital.” Source: RevenueBase Database · checked Sep 20, 2026
21	JMH Capital Partners, LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1-10	27 contacts →
	Indirect 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
22	Nonantum Capital Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “Nonantum Capital Partners is a private equity firm led by a group of experienced private equity and management executives, formed in 2018 as a spin-out from Charlesbank Capital…” Source: RevenueBase Database · checked Sep 20, 2026
23	BPEA	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	23 contacts →
	Indirect evidence “Private equity firm located in Boston, MA.” Source: RevenueBase Database · checked Sep 20, 2026
24	Fort Point Capital	Strong evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	23 contacts →
	Strong evidence “Fort Point Capital is a private equity firm focused on the lower middle market in the U.S.” Source: RevenueBase Database · checked Sep 20, 2026
25	M C Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect 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

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: lower middle market pe 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 lower middle market pe firms.
Partial evidence: Its own public description names part of lower middle market pe firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name lower middle market pe 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 113 lower middle market pe firms based in Boston, United States

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Lower middle market pe firms based in Boston, United States at a glance

As of Sep 20, 2026

48.1%Verified-email coverage

40.9Average contacts per company

1-10Median size (employees)

445.1%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 113 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 lower middle market pe 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 “lower middle market pe 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 lower middle market pe 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 lower middle market pe 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, 2,223 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.

Lower middle market pe firms by metro in the United States

Lower middle market pe firms in New York503
Lower middle market pe firms in Chicago213
Lower middle market pe firms in Dallas143
Lower middle market pe firms in Los Angeles130
Lower middle market pe firms in Boston113
Lower middle market pe firms in Houston97
Lower middle market pe firms in Austin88
Lower middle market pe firms in San Francisco86
Lower middle market pe firms in Atlanta84
Lower middle market pe firms in Miami74
Lower middle market pe firms in Charlotte58
Lower middle market pe firms in Denver54
Lower middle market pe firms in Greenwich43
Lower middle market pe firms in Minneapolis36
Lower middle market pe firms in Cleveland31
Lower middle market pe firms in Nashville29
Lower middle market pe firms in San Diego28
Lower middle market pe firms in Birmingham26
Lower middle market pe firms in Tampa26
Lower middle market pe firms in Washington25

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 lower middle market pe 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 lower middle market pe firms are there based in Boston, United States?

RevenueBase identified 113 lower middle market pe 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?

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

Which city has the most lower middle market pe firms?

New York leads with 503 headquartered companies, followed by Chicago (213) and Dallas (143).

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 2,223 verified decision-maker contacts tracked across these 113 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.