Company lists · Data refreshed September 2026

Top 25 Clinical stage biotech companies based in Boston, United States

Name: Clinical stage biotech 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 16, 2026 86 companies tracked

RevenueBase identified 86 clinical stage biotech companies headquartered in Boston, United States as of September 2026 and tracks 19,013 professional contacts across them, including 10,769 with verified work emails. Cambridge is the largest hub.

This list covers clinical stage biotech 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 16, 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 16, 2026 86% judged on-target in blind review

86Companies

19,013Contacts tracked

10,769Verified emails

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The 25 largest clinical stage biotech companies based in Boston, United States

Ranked by team size

Top 25 of 86 clinical stage biotech companies based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to clinical stage biotech 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	Vertex Pharmaceuticals	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	5,001-10,000	8,099 contacts →
	Partial evidence “Vertex is a global biotechnology company that invests in scientific innovation to create transformative medicines for people with serious diseases and has made significant…” Source: RevenueBase Database · checked Sep 16, 2026
2	Alexion Pharmaceuticals, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	6,136 contacts →
	Indirect evidence “Alexion, AstraZeneca Rare Disease is focused on pioneering new possibilities for the rare disease community.” Source: RevenueBase Database · checked Sep 16, 2026
3	EMD Serono, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,578 contacts →
	Indirect evidence “We aspire to create, improve and prolong life for people living with difficult-to-treat conditions like infertility, multiple sclerosis and cancer.” Source: RevenueBase Database · checked Sep 16, 2026
4	Inventiv Health Commercial	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	10001+	553 contacts →
	Indirect evidence “INC Research/inVentiv Health (Nasdaq:INCR) is the only fully integrated biopharmaceutical solutions organization.” Source: RevenueBase Database · checked Sep 16, 2026
5	Paratek Pharmaceuticals	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	201-500	396 contacts →
	Indirect evidence “Positive Outcomes.” Source: RevenueBase Database · checked Sep 16, 2026
6	Radius Health, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	201-500	297 contacts →
	Indirect evidence “We are a biopharmaceutical company dedicated to transforming the future for underserved, global patient populations in bone health and related areas.” Source: RevenueBase Database · checked Sep 16, 2026
7	Insilico Medicine	Strong evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	201-500	281 contacts →
	Strong evidence “Insilico Medicine, a clinical stage biotech company powered by generative AI, is connecting biology, chemistry, and clinical trials analysis using next-generation AI systems.” Source: RevenueBase Database · checked Sep 16, 2026
8	Solid Biosciences	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	160 contacts →
	Indirect evidence “Solid Biosciences is a precision genetic medicine company focused on advancing a portfolio of gene therapy candidates targeting rare neuromuscular and cardiac diseases, including…” Source: RevenueBase Database · checked Sep 16, 2026
9	Astria Therapeutics, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	n/a	113 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
10	Nimbus Therapeutics	Strong evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	102 contacts →
	Strong evidence “Nimbus Therapeutics is a clinical-stage, structure-based drug discovery company developing novel small molecule medicines designed to act against well-validated but…” Source: RevenueBase Database · checked Sep 16, 2026
11	X4 Pharmaceuticals	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	97 contacts →
	Partial evidence “We are a fully integrated, commercial-stage biopharmaceutical company driving progress for people living with rare immune disorders.” Source: RevenueBase Database · checked Sep 16, 2026
12	MPM Bioimpact	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	11-50	95 contacts →
	Partial 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 16, 2026
13	Zevra Therapeutics	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	78 contacts →
	Partial evidence “We are a purpose-driven, commercial-stage company with a late-stage pipeline committed to redefining what is possible in bringing life-changing therapies to people living with…” Source: RevenueBase Database · checked Sep 16, 2026
14	Puretech Health	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	75 contacts →
	Indirect evidence “PureTech Health is a hub-and-spoke biotherapeutics company dedicated to giving life to science and transforming innovation into value.” Source: RevenueBase Database · checked Sep 16, 2026
15	Intarcia Therapeutics, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	201-500	69 contacts →
	Indirect evidence “We operate with a “No Analog” mindset-continually pushing boundaries, navigating new terrain and unleashing fresh thinking.” Source: RevenueBase Database · checked Sep 16, 2026
16	Pyxis Oncology	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	67 contacts →
	Indirect evidence “Pyxis Oncology is transforming the lives of patients with cancer by advancing our differentiated portfolio of biologics that specifically target tumor cells and overcome immune…” Source: RevenueBase Database · checked Sep 16, 2026
17	Karuna Therapeutics	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	201-500	65 contacts →
	Indirect evidence “Karuna Therapeutics, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
18	Atea Pharmaceuticals, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	58 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
19	Superluminal Medicines INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	11-50	44 contacts →
	Indirect evidence “Superluminal Medicines is a Boston-based generative biology and chemistry company developing a differentiated pipeline and revolutionizing the speed and accuracy of how medicine…” Source: RevenueBase Database · checked Sep 16, 2026
20	LG Chem Life Sciences Usa, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	39 contacts →
	Indirect evidence “At LG Chem Life Sciences USA, we aim to transform lives by inspiring science and leading innovation in the key therapeutic areas of Immunology, Oncology, and Metabolic diseases.” Source: RevenueBase Database · checked Sep 16, 2026
21	Launch Therapeutics	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	11-50	35 contacts →
	Partial evidence “Launch Tx provides biotech and biopharma companies with solutions that speed drug candidates’ path to market and connection with investors that provide development funding.” Source: RevenueBase Database · checked Sep 16, 2026
22	Omega Funds	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect 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 16, 2026
23	AKT Health INC	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	11-50	26 contacts →
	Partial evidence “AKT Health was founded in 2017 in Japan & India by a team of Techno-functional experts in Clinical, Medical & Commercial fields.” Source: RevenueBase Database · checked Sep 16, 2026
24	Vivtex	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “Vivtex originated from MIT, with a mission to enable the development of new oral drugs using sophisticated high throughput screening technologies, IP protected formulation…” Source: RevenueBase Database · checked Sep 16, 2026
25	Nextrna Therapeutics	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “NextRNA Therapeutics, Inc.” Source: RevenueBase Database · checked Sep 16, 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: clinical stage biotech 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 clinical stage biotech companies.
Partial evidence: Its own public description names part of clinical stage biotech companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clinical stage biotech 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 86 clinical stage biotech companies based in Boston, United States

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Clinical stage biotech companies based in Boston, United States at a glance

As of Sep 16, 2026

56.6%Verified-email coverage

221.1Average contacts per company

11-50Median size (employees)

111.6%Largest-city concentration · Cambridge

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 86 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 clinical stage biotech 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 “clinical stage biotech 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 clinical stage biotech 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 clinical stage biotech 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, 10,769 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 16, 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.

Clinical stage biotech companies by metro in the United States

Clinical stage biotech companies in Cambridge96
Clinical stage biotech companies in San Diego96
Clinical stage biotech companies in Boston86
Clinical stage biotech companies in New York86
Clinical stage biotech companies in San Francisco43
Clinical stage biotech companies in South San Francisco40
Clinical stage biotech companies in Houston33
Clinical stage biotech companies in Chicago26
Clinical stage biotech companies in Waltham25

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 clinical stage biotech 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 clinical stage biotech companies are there based in Boston, United States?

RevenueBase identified 86 clinical stage biotech 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?

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

Which city has the most clinical stage biotech companies?

Cambridge leads with 96 headquartered companies, followed by San Diego (96) and Boston (86).

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 10,769 verified decision-maker contacts tracked across these 86 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 16, 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.