Company lists · Data refreshed September 2026

Top 25 Private investment companies based in Boston, United States

Name: Private investment companies 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 117 companies tracked

RevenueBase identified 117 company matches for private investment companies associated with Boston, United States as of September 2026 and tracks 8,669 professional contacts across them, including 4,691 with verified work emails. Across the United States, New York is the largest hub for this category (786 companies); Boston has 117.

This list covers company matches for private investment companies 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 20, 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 20, 2026 How this list was built

117Companies

8,669Contacts tracked

4,691Verified emails

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The 25 largest private investment companies based in Boston, United States

Ranked by team size

Top 25 of 117 company matches for private investment companies based in Boston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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	Bain Capital	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,068 contacts →
	Exact match “Founded in 1984, Bain Capital is one of the world’s leading private investment firms.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	Harbourvest Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,353 contacts →
	Exact match “HarbourVest is an independent, global private markets firm with over 43 years of experience and $161 billion assets under management as of December 31, 2025.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	Advent	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
4	TA Associates	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
5	PSG	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
6	Summit Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
7	Berkshire Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
8	Charlesbank Capital Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
9	Audax Private Equity	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
10	THL Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
11	Great Hill Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
12	Spectrum Equity	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
13	Highvista Strategies	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	51-200	91 contacts →
	Exact match “HighVista Strategies LLC is an employee-owned alternative asset manager that brings investors alpha opportunities in structurally inefficient markets.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	BV Investment Partners	Exact match	Boston, United StatesHQ recorded Sep 20, 2026	11-50	72 contacts →
	Exact match “BV Investment Partners is one of the oldest and most experienced sector-focused private equity firms in North America.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	Parthenon Capital	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
16	Silversmith Capital Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	51-200	63 contacts →
	Exact match “Founded in 2015, Silversmith Capital Partners is a Boston-based growth equity firm with over $5 billion in capital under management.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Baypine	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	11-50	61 contacts →
	Exact match “BayPine is a private investment firm that seeks to create lasting value for the firm's investors, portfolio companies and communities in which they operate by driving innovation…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	Cove Hill Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	51-200	53 contacts →
	Exact match “Cove Hill Partners is a private equity firm focused on partnering with outstanding management teams to build market-leading technology and consumer companies.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Ampersand Capital Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	11-50	45 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	Copley Equity Partners LLC	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
21	Solamere Capital, LLC	Exact match	Boston, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
22	Conjoin Group	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
23	BOWEN	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	11-50	32 contacts →
	Exact match “Bowen partners with growth tech companies to drive value creation within the innovation economy.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	Riverside Partners	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 2026	11-50	32 contacts →
	Exact match “Founded in 1989, Riverside Partners is a Boston-based middle market private equity firm currently investing Riverside Fund VI, L.P.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	Union Park Capital	Exact match	Boston, MA, United StatesHQ recorded Sep 20, 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 20, 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 “private investment companies”. 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 117 private investment companies based in Boston, United States

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Private investment companies based in Boston, United States at a glance

As of Sep 20, 2026

54.1%Verified-email coverage

74.1Average contacts per company

1-10Median size (employees)

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 117 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 “private investment companies” 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 4,691 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 20, 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.

Private investment companies 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 “private investment companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many private investment companies are there based in Boston, United States?

RevenueBase identified 117 company matches for private investment companies 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?

Bain Capital 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 private investment companies?

New York leads the United States with 786 company records, followed by Chicago (222) and Los Angeles (173). Boston has 117.

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 4,691 professional contacts with verified work emails tracked across these 117 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 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 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.