Company lists · Data refreshed September 2026

Top 25 Middle market investment firms based in Boston, United States

Name: Middle market investment 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 28, 2026 129 companies tracked

RevenueBase identified 129 company matches for middle market investment firms associated with Boston, United States as of September 2026 and tracks 5,290 professional contacts across them, including 2,493 with verified work emails. Across the United States, New York is the largest hub for this category (652 companies); Boston has 129.

This list covers company matches for middle market investment firms associated with Boston, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

129Companies

5,290Contacts tracked

2,493Verified emails

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

Ranked by team size

Top 25 of 129 company matches for middle market investment firms based in Boston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Advent	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	501-1,000	1,025 contacts →
	Exact match “Advent is a leading global private equity investor committed to working in partnership with management teams, entrepreneurs, and founders to help transform businesses.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	TA Associates	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	201-500	881 contacts →
	Exact match “TA is a leading global private equity firm focused on scaling growth in profitable companies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	PSG	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	513 contacts →
	Exact match “PSG is a growth equity firm that partners with software and technology-enabled services companies to help them navigate transformational growth, capitalize on strategic…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Summit Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	465 contacts →
	Exact match “Summit Partners is a global alternative investment firm with capital dedicated to growth equity, fixed income, and public equity opportunities.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Berkshire Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	201-500	255 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Charlesbank Capital Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	236 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Audax Private Equity	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	201-500	211 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	THL Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	148 contacts →
	Exact match “THL Partners is a Boston-based private equity firm investing in middle-market growth companies in three industry groups: Financial Technology & Services, Healthcare, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Great Hill Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	110 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	AGC Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	109 contacts →
	Exact match “AGC Partners is a global technology investment bank focused on middle market M&A and growth equity financings for emerging growth companies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Spectrum Equity	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	94 contacts →
	Exact match “Founded in 1994, Spectrum Equity is a leading growth equity firm with offices in Boston, San Francisco, and London.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Parthenon Capital	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	68 contacts →
	Exact match “Parthenon Capital Partners (“Parthenon” or “Parthenon Capital”) is a private equity firm that partners with and invests in management teams and their companies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Provident Healthcare Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	58 contacts →
	Exact match “Provident is the leading investment banking firm specializing in merger and acquisition advisory, strategic planning, and capital formation for middle-market and emerging growth…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Versailles Group, LTD	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	49 contacts →
	Exact match “Founded in 1987, Versailles Group is a boutique investment banking firm specializing in mergers, acquisitions, divestitures, private placements, and fairness opinions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Copley Equity Partners LLC	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	42 contacts →
	Exact match “Copley Equity Partners is a private investment firm based in Boston, MA, and Denver, CO.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	NEW Boston Fund	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	51-200	41 contacts →
	Exact match “Founded in 1993, New Boston is a real estate investment management firm based in Boston, MA that manages over 1.2 billion dollars in private equity capital on behalf of high net…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Solamere Capital, LLC	Exact match	Boston, United StatesHQ recorded Sep 28, 2026	11-50	37 contacts →
	Exact match “Founded in 2008, Solamere is a multi-strategy private equity firm with offices in Boston and New York City.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Covington Associates	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	36 contacts →
	Exact match “Covington Associates is an investment banking firm offering advisory services in the areas of M&A, capital raising, strategic advisory, fairness opinions, and valuations to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Conjoin Group	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	201-500	36 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Frontier Capital Management Company, LLC	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	32 contacts →
	Exact match “Founded in 1980, Frontier Capital Management Company, LLC is a Boston-based investment management firm specializing in small-cap, smid-cap and mid-cap companies” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Union Park Capital	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	n/a	31 contacts →
	Exact match “Union Park Capital is a private equity investment firm focused solely on lower middle-market Industrial Technology companies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Pathlight Capital	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	28 contacts →
	Exact match “Pathlight Capital is a private credit investment manager dedicated to meeting the needs of companies that operate across a broad range of industries by providing asset-based loans…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Sverica Capital Management	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	27 contacts →
	Exact match “Sverica Capital Management LP is a leading growth-oriented lower middle market private equity firm with $2.2 billion in aggregate committed capital.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Raptor Group	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	27 contacts →
	Exact match “At The Raptor Group, we source and invest in companies across various stages and asset classes, ranging from early stage to both private and public equity to funds.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	JMH Capital Partners, LLC	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	1-10	27 contacts →
	Exact match “JMH CAPITAL PARTNERS is a generalist private equity firm that acquires profitable businesses in North America with revenues of $5 million to $100 million.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “middle market investment firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 129 middle market investment firms based in Boston, United States

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Middle market investment firms based in Boston, United States at a glance

As of Sep 28, 2026

47.1%Verified-email coverage

41.0Average contacts per company

1-10Median size (employees)

Sep 28, 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 129 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Boston, United States whose business descriptions match “middle market investment firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,493 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Middle market investment firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “middle market investment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many middle market investment firms are there based in Boston, United States?

RevenueBase identified 129 company matches for middle market investment firms associated with Boston, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Advent tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most middle market investment firms?

New York leads the United States with 652 company records, followed by Chicago (216) and Dallas (178). Boston has 129.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,493 professional contacts with verified work emails tracked across these 129 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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.