Company lists · Data refreshed September 2026

Top 25 Biopharmaceutical companies based in Waltham, United States

Name: Biopharmaceutical companies based in Waltham, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 41 companies tracked

The Waltham biopharmaceutical companies directory lists 41 companies developing and commercializing medicines based on biological products. It includes 82,797 business contacts and 44,611 email addresses for organizations in the category. The directory was updated in September 2026. Across the United States, San Diego is the largest hub for this category (194 companies); Waltham has 41.

Biopharmaceutical companies discover, develop, manufacture, or commercialize medicines made from biological sources, including proteins, antibodies, vaccines, and cell or gene therapies. This list covers companies whose primary business includes the research, development, manufacturing, or commercialization of biopharmaceutical products. Ranked by team size, largest first. Data current as of September 14, 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 14, 2026 86% judged on-target in blind review

41Companies

82,797Contacts tracked

44,611Verified emails

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The 25 largest biopharmaceutical companies based in Waltham, United States

Ranked by team size

Top 25 of 41 biopharmaceutical companies based in Waltham, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to biopharmaceutical 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	Thermo Fisher Scientific	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	10001+	70,907 contacts →
	Indirect evidence “About Thermo Fisher Scientific Thermo Fisher Scientific Inc.” Source: RevenueBase Database · checked Sep 14, 2026
2	Revvity	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	10001+	2,938 contacts →
	Indirect evidence “At Revvity, “impossible” is inspiration, and ""can't be done"" is a call to action.” Source: RevenueBase Database · checked Sep 14, 2026
3	Patheon	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	10001+	2,004 contacts →
	Indirect evidence “Thermo Fisher Scientific provides industry-leading pharma services for drug development, clinical trial logistics, and commercial manufacturing through our Patheon™ brand.” Source: RevenueBase Database · checked Sep 14, 2026
4	Repligen Corporation	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	1,001-5,000	1,254 contacts →
	Indirect evidence “Repligen, a global, bioprocessing-focused life sciences company, provides innovative solutions for the advancement of biotherapeutic manufacturing.” Source: RevenueBase Database · checked Sep 14, 2026
5	Nova Biomedical	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	1,001-5,000	1,107 contacts →
	Indirect evidence “Nova Biomedical is entering a new chapter.” Source: RevenueBase Database · checked Sep 14, 2026
6	Apellis Pharmaceuticals	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	501-1,000	823 contacts →
	Indirect evidence “Apellis is now part of Biogen.” Source: RevenueBase Database · checked Sep 14, 2026
7	Amag Pharmaceuticals	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	201-500	548 contacts →
	Indirect evidence “At AMAG, aiming higher is in our DNA.” Source: RevenueBase Database · checked Sep 14, 2026
8	Ardelyx, INC	Strong evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	201-500	497 contacts →
	Strong evidence “Ardelyx is a commercial-stage biopharmaceutical company focused on the development and commercialization of innovative medicines that meet significant unmet medical needs.” Source: RevenueBase Database · checked Sep 14, 2026
9	Elevatebio	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	201-500	361 contacts →
	Indirect evidence “ElevateBio is a technology-driven advanced therapy contract development and manufacturing organization (CDMO) powering the creation of life-transforming therapies.” Source: RevenueBase Database · checked Sep 14, 2026
10	SOBI	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	201-500	326 contacts →
	Indirect evidence “Sobi is an international specialty healthcare company dedicated to developing treatments and extensive patient support networks for people with rare and difficult to treat…” Source: RevenueBase Database · checked Sep 14, 2026
11	Viridian Therapeutics, INC	Strong evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	201-500	282 contacts →
	Strong evidence “Viridian is a biopharmaceutical company focused on engineering and developing potential best-in-class medicines for patients with serious and rare diseases.” Source: RevenueBase Database · checked Sep 14, 2026
12	Zenas Biopharma	Strong evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	159 contacts →
	Strong evidence “Zenas is a clinical-stage global biopharmaceutical company committed to becoming a leader in the development and commercialization of transformative therapies for patients living…” Source: RevenueBase Database · checked Sep 14, 2026
13	Ventus Therapeutics	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	11-50	101 contacts →
	Indirect evidence “At Ventus, we are pioneering a unique approach to structure-based drug discovery to address biologically validated, but difficult-to-drug targets.” Source: RevenueBase Database · checked Sep 14, 2026
14	Spyre Therapeutics	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	96 contacts →
	Indirect evidence “Spyre Therapeutics is a clinical-stage biotechnology company that aims to create next-generation inflammatory bowel disease (IBD) and other immune-mediated disease products by…” Source: RevenueBase Database · checked Sep 14, 2026
15	Dragonfly Therapeutics, INC	Strong evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	95 contacts →
	Strong evidence “Dragonfly Therapeutics is a clinical-stage biopharmaceutical company committed to discovering, developing and commercializing therapies that use its novel multispecific antibody…” Source: RevenueBase Database · checked Sep 14, 2026
16	LLX Solutions LLC	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	86 contacts →
	Indirect evidence “LLX Solutions is now a part of Quantive Intelligence (QI), a Decision Sciences platform providing specialized biometrics expertise across biostatistics, statistical programming…” Source: RevenueBase Database · checked Sep 14, 2026
17	Upstream BIO	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	62 contacts →
	Indirect evidence “We are advancing verekitug, a clinical-stage monoclonal antibody targeting an upstream driver of inflammatory response.” Source: RevenueBase Database · checked Sep 14, 2026
18	Paragon Therapeutics, INC	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	11-50	53 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
19	Orionis Biosciences	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	11-50	50 contacts →
	Indirect evidence “Orionis Biosciences is a life sciences company pioneering technological innovation in genome-scale drug discovery and tunable molecular design of novel therapeutic drug modalities.” Source: RevenueBase Database · checked Sep 14, 2026
20	Crescent Biopharma	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	48 contacts →
	Indirect evidence “Crescent Biopharma’s vision is to build a world leading oncology company bringing the next wave of therapies for cancer patients.” Source: RevenueBase Database · checked Sep 14, 2026
21	Sironax	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	36 contacts →
	Indirect evidence “Sironax is a clinical-stage biotechnology company developing transformative therapies for neurodegenerative, inflammatory, immunologic, and metabolic diseases.” Source: RevenueBase Database · checked Sep 14, 2026
22	Dynamicure Biotechnology	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	11-50	29 contacts →
	Indirect evidence “Driven by science and passionate about advancing patient care, DynamiCure is translating breakthrough insights on immuno-normalization into a pipeline of innovative antibody…” Source: RevenueBase Database · checked Sep 14, 2026
23	Bioverativ, A Sanofi Company	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	201-500	29 contacts →
	Indirect evidence “Bioverativ, a Sanofi company, is dedicated to transforming the lives of people with hemophilia and other rare blood disorders through world-class research, development, and…” Source: RevenueBase Database · checked Sep 14, 2026
24	Bonito Biosciences	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	11-50	26 contacts →
	Indirect evidence “Bonito is building the data foundation for programmable oligotherapeutic delivery to any cell or tissue type.” Source: RevenueBase Database · checked Sep 14, 2026
25	Conjugate Group	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 14, 2026	51-200	23 contacts →
	Indirect evidence “The Conjugate Group provides flexible drug development and manufacturing services and resources to the pharmaceutical and medical device industries.” Source: RevenueBase Database · checked Sep 14, 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: biopharmaceutical 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 biopharmaceutical companies.
Partial evidence: Its own public description names part of biopharmaceutical companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name biopharmaceutical 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 41 biopharmaceutical companies based in Waltham, United States

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Biopharmaceutical companies based in Waltham, United States at a glance

As of Sep 14, 2026

53.9%Verified-email coverage

2019.4Average contacts per company

51-200Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than for Waltham, so it is reported there. Company counts and contact totals on this page are exact for Waltham, over 41 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 biopharmaceutical 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 Waltham, United States whose own description of what they do matches “biopharmaceutical 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 biopharmaceutical 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 biopharmaceutical companies, and records with no verified work email. Companies headquartered outside Waltham 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, 44,611 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 14, 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.

Biopharmaceutical companies by metro in the United States

Frequently asked

How many biopharmaceutical companies are in the directory?

The directory contains 41 biopharmaceutical companies based in Waltham, United States.

Which city in the United States has the most biopharmaceutical companies?

San Diego leads the United States with 194 headquartered companies, followed by Boston (127) and Cambridge (122). Waltham has 41.

What contact data is available for biopharmaceutical companies?

The directory includes 82,797 business contacts and 44,611 email addresses for the listed biopharmaceutical companies.

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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.