Company lists · Data refreshed September 2026

Top 25 Biotech private equity companies based in Boston, United States

Name: Biotech private equity 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 2, 2026 58 companies tracked

RevenueBase identified 58 biotech private equity companies headquartered in Boston, United States as of September 2026 and tracks 1,130 professional contacts across them, including 533 with verified work emails and 486 with mobile numbers. New York is the largest hub.

This list covers biotech private equity companies 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 2, 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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

58Companies

1,130Contacts tracked

533Verified emails

486Mobile numbers

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The 25 largest biotech private equity companies based in Boston, United States

Ranked by team size

Top 25 of 58 biotech private equity companies based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to biotech private equity companies: 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	RA Capital Management	Partial evidence	Boston, MA, United States	201-500	242 contacts →
	Partial evidence “Founded in 2004, RA Capital Management is an active, multi-stage investment manager dedicated to evidence-based, science-led investing in public and private healthcare, life…” Source: RevenueBase Database · checked Sep 2, 2026
2	Third Rock Ventures	Indirect evidence	Boston, MA, United States	51-200	110 contacts →
	Indirect evidence “We discover, launch and build great companies based on bold ideas that meet at the intersection of science, strategy, business and medicine – where transformational science meets…” Source: RevenueBase Database · checked Sep 2, 2026
3	Optum Ventures	Indirect evidence	Boston, United States	11-50	60 contacts →
	Indirect evidence “At Optum Ventures, we look for exceptional teams with data-driven technologies and services that are poised to deeply disrupt the status quo.” Source: RevenueBase Database · checked Sep 2, 2026
4	5am Ventures	Indirect evidence	Boston, MA, United States	11-50	47 contacts →
	Indirect evidence “5AM was founded in 2002 and pursues investments in advanced life science innovations, and seeks to be diversified across the biopharmaceutical therapeutics, and platform…” Source: RevenueBase Database · checked Sep 2, 2026
5	Ampersand Capital Partners	Strong evidence	Boston, MA, United States	11-50	47 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 2, 2026
6	Altimeter	Indirect evidence	Boston, MA, United States	11-50	42 contacts →
	Indirect evidence “Altimeter is a technology-focused investment firm built by a founder for founders.” Source: RevenueBase Database · checked Sep 2, 2026
7	Pillar VC	Indirect evidence	Boston, MA, United States	11-50	40 contacts →
	Indirect evidence “Pillar VC is with you from the beginning.” Source: RevenueBase Database · checked Sep 2, 2026
8	SV Investment	Strong evidence	Boston, MA, United States	11-50	40 contacts →
	Strong evidence “SV Investment is a venture capital & private equity firm headquartered in Seoul, Korea, with offices located in Boston, Shanghai, Shenzhen and Jakarta.” Source: RevenueBase Database · checked Sep 2, 2026
9	Longitude Capital	Partial evidence	Boston, MA, United States	11-50	33 contacts →
	Partial evidence “Longitude Capital specializes in making venture growth investments in biotechnology, medical technology and health solutions companies that seek to improve clinical outcomes…” Source: RevenueBase Database · checked Sep 2, 2026
10	TWO Bear Capital	Indirect evidence	Boston, MA, United States	11-50	30 contacts →
	Indirect evidence “Two Bear Capital is a venture capital firm that invests in entrepreneurs who have breakthrough ideas in life sciences and technology.” Source: RevenueBase Database · checked Sep 2, 2026
11	Angelini Ventures	Indirect evidence	Boston, United States	11-50	30 contacts →
	Indirect evidence “Angelini Ventures is the venture capital arm of Angelini Industries funded with a €300 million capital commitment to build and invest in companies that develop innovative ideas…” Source: RevenueBase Database · checked Sep 2, 2026
12	Riverside Partners	Strong evidence	Boston, MA, United States	11-50	29 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 2, 2026
13	Abingworth	Indirect evidence	Boston, MA, United States	11-50	28 contacts →
	Indirect evidence “Abingworth is a leading transatlantic life sciences investment firm.” Source: RevenueBase Database · checked Sep 2, 2026
14	Transformation Capital	Indirect evidence	Boston, MA, United States	11-50	27 contacts →
	Indirect evidence “Never in history has there been a better time to change and improve the $3 trillion healthcare system and lead the charge in its disruption.” Source: RevenueBase Database · checked Sep 2, 2026
15	Catalyst Health Ventures	Indirect evidence	Boston, MA, United States	1-10	23 contacts →
	Indirect evidence “CHV (Catalyst Health Ventures) invests in transformative MedTech companies that are addressing global unmet healthcare needs and have the potential to become the new standard of…” Source: RevenueBase Database · checked Sep 2, 2026
16	Trustbridge Partners	Strong evidence	Boston, MA, United States	51-200	19 contacts →
	Strong evidence “Trustbridge is a growth-oriented private equity firm investing globally in innovative, high quality companies in various stages across Technology, Healthcare and Media.” Source: RevenueBase Database · checked Sep 2, 2026
17	Longwood Fund	Indirect evidence	Boston, MA, United States	1-10	15 contacts →
	Indirect evidence “Longwood creates and invests in science-based companies that develop novel solutions for important medical problems.” Source: RevenueBase Database · checked Sep 2, 2026
18	Cure Ventures	Indirect evidence	Boston, MA, United States	1-10	14 contacts →
	Indirect evidence “Cure Ventures is a venture capital firm focusing on company formation around groundbreaking curative technologies.” Source: RevenueBase Database · checked Sep 2, 2026
19	Cormorant Asset Management, LP	Indirect evidence	Boston, MA, United States	11-50	14 contacts →
	Indirect evidence “Cormorant Asset Management LP is an Investment Manager based out of 200 Clarendon Street, Boston, Massachusetts, United States.” Source: RevenueBase Database · checked Sep 2, 2026
20	Excel Venture Management, LLC	Indirect evidence	Boston, MA, United States	1-10	12 contacts →
	Indirect evidence “Excel Venture Management builds companies that apply transformative life science technologies to solve problems in healthcare and beyond.” Source: RevenueBase Database · checked Sep 2, 2026
21	Delos Capital	Indirect evidence	Boston, United States	11-50	11 contacts →
	Indirect evidence “Delos Capital is a life sciences investment firm.” Source: RevenueBase Database · checked Sep 2, 2026
22	Xontogeny	Partial evidence	Boston, MA, United States	1-10	9 contacts →
	Partial evidence “Xontogeny (zon-TOJ-uh-nee) is a biotech aggregator with a differentiated business model to support the accelerated development of life science technologies in the pursuit of…” Source: RevenueBase Database · checked Sep 2, 2026
23	Bioventures Investors	Indirect evidence	Boston, MA, United States	1-10	7 contacts →
	Indirect evidence “ADVANCING THE GROWTH OF MEDTECH: We are partner with the innovators who are changing the practice of medicine.” Source: RevenueBase Database · checked Sep 2, 2026
24	Newpath Partners	Partial evidence	Boston, MA, United States	1-10	6 contacts →
	Partial evidence “Multi-stage venture capital firm building and investing in disruptive biotechnology companies.” Source: RevenueBase Database · checked Sep 2, 2026
25	Medscience Ventures, LLC	Partial evidence	Boston, MA, United States	11-50	5 contacts →
	Partial evidence “US/Asia-based venture capital portfolio focused on emerging technologies in the biotech & healthcare sectors.” Source: RevenueBase Database · checked Sep 2, 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: biotech private equity companies. 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 biotech private equity companies.
Partial evidence: Its own public description names part of biotech private equity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name biotech private equity companies. 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 58 biotech private equity companies based in Boston, United States

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Biotech private equity companies based in Boston, United States at a glance

As of Sep 2, 2026

47.2%Verified-email coverage

43.0%Mobile-number coverage

19.5Average contacts per company

1-10Median size (employees)

156.9%Largest-city concentration · New York

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

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 biotech private equity companies, 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 “biotech private equity companies”. 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 biotech private equity companies), 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 biotech private equity companies, 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, 533 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 2, 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.

Biotech private equity companies by metro in the United States

Biotech private equity companies in New York91
Biotech private equity companies in Boston58
Biotech private equity companies in San Francisco35
Biotech private equity companies in Cambridge29

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 biotech private equity companies, 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 biotech private equity companies are there based in Boston, United States?

RevenueBase identified 58 biotech private equity companies 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?

RA Capital Management, headquartered in Boston, tops this list with the largest team on record.

Which city has the most biotech private equity companies?

New York leads with 91 headquartered companies, followed by Boston (58) and San Francisco (35).

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 533 verified decision-maker contacts tracked across these 58 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 2, 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.