Company lists · Data refreshed September 2026

Top 25 Seed stage life sciences investors based in Boston, United States

Name: Seed stage life sciences investors based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 57 companies tracked

RevenueBase identified 57 seed stage life sciences investors headquartered in Boston, United States as of September 2026 and tracks 880 professional contacts across them, including 447 with verified work emails. New York is the largest hub.

This list covers seed stage life sciences investors 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 17, 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 17, 2026 86% judged on-target in blind review

57Companies

880Contacts tracked

447Verified emails

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The 25 largest seed stage life sciences investors based in Boston, United States

Ranked by team size

Top 25 of 57 seed stage life sciences investors based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to seed stage life sciences investors: 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	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	201-500	251 contacts →
	Strong 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 17, 2026
2	Third Rock Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	51-200	113 contacts →
	Partial 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 17, 2026
3	MPM Bioimpact	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	11-50	95 contacts →
	Indirect evidence “MPM BioImpact is a world-leading biotechnology investment firm with nearly three decades of experience creating and investing in companies that seek to translate scientific…” Source: RevenueBase Database · checked Sep 17, 2026
4	Optum Ventures	Indirect evidence	Boston, United StatesHQ checked Sep 17, 2026	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 17, 2026
5	Omega Funds	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	11-50	26 contacts →
	Strong evidence “Omega Funds is a leading international investment firm that creates and invests in life sciences companies that target the world’s most urgent medical needs.” Source: RevenueBase Database · checked Sep 17, 2026
6	Catalyst Health Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	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 17, 2026
7	K2 Healthventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	11-50	22 contacts →
	Strong evidence “K2 HealthVentures (K2HV) is an alternative investment firm that provides flexible, long-term financing solutions to innovative private and public companies in the life sciences…” Source: RevenueBase Database · checked Sep 17, 2026
8	Shields Health Innovations	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	11-50	17 contacts →
	Partial evidence “Shields Health Innovations is focused on stage agnostic healthcare services investment partnership with unwavering focus on doing right by the patient and building better…” Source: RevenueBase Database · checked Sep 17, 2026
9	Saturn Partners	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	15 contacts →
	Strong evidence “Since 1993, Saturn has been an opportunistic investor that takes a hands-on approach to investing in proprietary seed and early stage venture capital opportunities located…” Source: RevenueBase Database · checked Sep 17, 2026
10	Cormorant Asset Management, LP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	11-50	13 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 17, 2026
11	Liquidmetal Ventures	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	11-50	13 contacts →
	Partial evidence “LiquidMetal Ventures is a Boston based, early-stage focused venture capital fund focusing on Energy & Sustainability, Biotech & Healthcare and AI & Robotics, with a mission…” Source: RevenueBase Database · checked Sep 17, 2026
12	Excel Venture Management, LLC	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	12 contacts →
	Strong evidence “Excel Venture Management builds companies that apply transformative life science technologies to solve problems in healthcare and beyond.” Source: RevenueBase Database · checked Sep 17, 2026
13	Delos Capital	Strong evidence	Boston, United StatesHQ checked Sep 17, 2026	11-50	11 contacts →
	Strong evidence “Delos Capital is a life sciences investment firm.” Source: RevenueBase Database · checked Sep 17, 2026
14	Innospark Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	9 contacts →
	Strong evidence “Innospark Ventures is an early-stage venture capital firm that invests in AI-native companies solving previously intractable problems across healthcare, life sciences, and…” Source: RevenueBase Database · checked Sep 17, 2026
15	Xontogeny	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	9 contacts →
	Strong 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 17, 2026
16	Boston Harbor Angels	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	9 contacts →
	Indirect evidence “Boston Harbor Angels, Celebrating 20 Years of Angel Investing, like a lighthouse, helps entrepreneurs navigate and grow their start-up businesses through the treacherous waters of…” Source: RevenueBase Database · checked Sep 17, 2026
17	Bioventures Investors	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	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 17, 2026
18	Quadrascope	Partial evidence	Boston, United StatesHQ checked Sep 17, 2026	1-10	7 contacts →
	Partial evidence “quadraScope invests in early-stage healthcare companies developing pharmaceuticals, diagnostics, software, equipment and devices enabling biological age reversal, disease…” Source: RevenueBase Database · checked Sep 17, 2026
19	Iaso Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	7 contacts →
	Indirect evidence “Iaso Ventures is a venture capital firm located in Boston.” Source: RevenueBase Database · checked Sep 17, 2026
20	Longview Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence “In 2018, the Leducq Trust launched Longview Ventures to make investments in select portfolio companies of Broadview Ventures, a mission-driven investment organization focused on…” Source: RevenueBase Database · checked Sep 17, 2026
21	Newpath Partners	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	6 contacts →
	Partial evidence “Multi-stage venture capital firm building and investing in disruptive biotechnology companies.” Source: RevenueBase Database · checked Sep 17, 2026
22	Freemind Investments A Venture Capital Fund	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	51-200	5 contacts →
	Indirect evidence “A novel and effective investment vehicle aimed at bridging the infamous biotech startup “valley of death” and generating high returns, while furthering the development of medical…” Source: RevenueBase Database · checked Sep 17, 2026
23	Solasta Ventures	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence “Solasta Ventures, Inc.(formerly known in the U.S.” Source: RevenueBase Database · checked Sep 17, 2026
24	82vs	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	Clinical Research Ventures	Strong evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1-10	3 contacts →
	Strong evidence “CR Ventures is a global life-science investor with a focus on companies entering Phase I or II clinical trials.” Source: RevenueBase Database · checked Sep 17, 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: seed stage life sciences investors. 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 seed stage life sciences investors.
Partial evidence: Its own public description names part of seed stage life sciences investors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name seed stage life sciences investors. 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 57 seed stage life sciences investors based in Boston, United States

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Seed stage life sciences investors based in Boston, United States at a glance

As of Sep 17, 2026

50.8%Verified-email coverage

15.4Average contacts per company

1-10Median size (employees)

180.7%Largest-city concentration · New York

Sep 17, 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 57 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 seed stage life sciences investors, 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 “seed stage life sciences investors”. 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 seed stage life sciences investors), 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 seed stage life sciences investors, 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, 447 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 17, 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.

Seed stage life sciences investors by metro in the United States

Seed stage life sciences investors in New York103
Seed stage life sciences investors in San Francisco61
Seed stage life sciences investors in Boston57
Seed stage life sciences investors in Palo Alto27
Seed stage life sciences investors in Chicago25

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 seed stage life sciences investors, 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 seed stage life sciences investors are there based in Boston, United States?

RevenueBase identified 57 seed stage life sciences investors 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 seed stage life sciences investors?

New York leads with 103 headquartered companies, followed by San Francisco (61) and Boston (57).

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 447 verified decision-maker contacts tracked across these 57 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 17, 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.