Company lists · Data refreshed September 2026

Top 25 Recombinant protein manufacturers based in the United States

Name: Recombinant protein manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 348 companies tracked

RevenueBase identified 348 recombinant protein manufacturers headquartered in the United States as of September 2026 and tracks 13,582 professional contacts across them, including 6,258 with verified work emails. San Diego is the largest hub.

This list covers recombinant protein manufacturers headquartered in the 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

348Companies

13,582Contacts tracked

6,258Verified emails

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The 25 largest recombinant protein manufacturers based in the United States

Ranked by team size

Top 25 of 348 recombinant protein manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to recombinant protein manufacturers: 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	KBI Biopharma	Indirect evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,645 contacts →
	Indirect evidence “KBI Biopharma is an award-winning biopharmaceutical contract services organization providing fully-integrated, accelerated drug development and biomanufacturing services to…” Source: RevenueBase Database · checked Sep 17, 2026
2	Genscript	Indirect evidence	Piscataway, NJ, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,194 contacts →
	Indirect evidence “GenScript Life Science Group is a part of GenScript Biotech Corporation.” Source: RevenueBase Database · checked Sep 17, 2026
3	Inotiv	Indirect evidence	West Lafayette, IN, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,015 contacts →
	Indirect evidence “WHERE INSIGHTS LEAD TO ANSWERS Expect More In choosing a partner for discovery, development and research models, expect more: more attention, more insight, and a superlative…” Source: RevenueBase Database · checked Sep 17, 2026
4	Biolegend	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	501-1,000	670 contacts →
	Indirect evidence “At BioLegend, we are committed to providing researchers with the most comprehensive and cutting-edge high-quality reagents for life science research.” Source: RevenueBase Database · checked Sep 17, 2026
5	Sdix LLC	Indirect evidence	Newark, DE, United StatesHQ checked Sep 17, 2026	51-200	559 contacts →
	Indirect evidence “SDIX, a wholly owned subsidiary of OriGene Technologies specializing in high quality, large-scale, GMP antibody production.” Source: RevenueBase Database · checked Sep 17, 2026
6	Cayman Chemical	Partial evidence	Ann Arbor, MI, United StatesHQ checked Sep 17, 2026	201-500	287 contacts →
	Partial evidence “Helping Make Research Possible We are helping make research possible by supplying scientists worldwide with the assay kits, antibodies, proteins, and biochemicals to advance their…” Source: RevenueBase Database · checked Sep 17, 2026
7	Takara BIO Usa, INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	201-500	263 contacts →
	Partial evidence “Takara Bio USA, Inc.(formerly Clontech Laboratories, Inc.), a Takara Bio company, develops, manufactures, and distributes a wide range of life science reagents under the Takara®…” Source: RevenueBase Database · checked Sep 17, 2026
8	Proteintech Group	Indirect evidence	Rosemont, IL, United StatesHQ checked Sep 17, 2026	201-500	240 contacts →
	Indirect evidence “For when you need it all.” Source: RevenueBase Database · checked Sep 17, 2026
9	Santa Cruz Biotechnology Scbt	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	201-500	182 contacts →
	Indirect evidence “Santa Cruz Biotechnology, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
10	Probio	Indirect evidence	Pennington, NJ, United StatesHQ checked Sep 17, 2026	201-500	181 contacts →
	Indirect evidence “ProBio is a global contract development and manufacturing (CDMO) organization, which aims to accelerate the manufacturing of life-changing drugs, discover novel therapeutic…” Source: RevenueBase Database · checked Sep 17, 2026
11	Enzo Life Sciences, INC	Indirect evidence	Farmingdale, NY, United StatesHQ checked Sep 17, 2026	51-200	166 contacts →
	Indirect evidence “For more than 45 years, Enzo Biochem has been a leader in innovation and product development to support a diverse range of needs in biomedical research and healthcare.” Source: RevenueBase Database · checked Sep 17, 2026
12	Acrobiosystems	Indirect evidence	Newark, DE, United StatesHQ checked Sep 17, 2026	501-1,000	151 contacts →
	Indirect evidence “ACROBiosystems Group, founded in 2010 and listed in 2021, is a biotechnology company aimed at being a cornerstone of the global biopharmaceutical and health industries by…” Source: RevenueBase Database · checked Sep 17, 2026
13	Adimab	Indirect evidence	Lebanon, NH, United StatesHQ checked Sep 17, 2026	51-200	150 contacts →
	Indirect evidence “Adimab is the most successful antibody discovery and engineering company in the industry and the partner of choice for biopharma.” Source: RevenueBase Database · checked Sep 17, 2026
14	Vector Laboratories, INC	Indirect evidence	Newark, CA, United StatesHQ checked Sep 17, 2026	201-500	140 contacts →
	Indirect evidence “Vector Laboratories serves and partners with scientists and industry teams developing the next generation of diagnostics, therapeutics, and biological insights.” Source: RevenueBase Database · checked Sep 17, 2026
15	Integral Molecular	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 17, 2026	51-200	138 contacts →
	Partial evidence “Integral Molecular is a research-driven biotechnology company specializing in antibodies, viruses, and membrane proteins.” Source: RevenueBase Database · checked Sep 17, 2026
16	ATUM	Indirect evidence	Newark, CA, United StatesHQ checked Sep 17, 2026	51-200	122 contacts →
	Indirect evidence “ATUM is an industry-leading provider of life science tools and solutions.” Source: RevenueBase Database · checked Sep 17, 2026
17	Medchemexpress LLC	Indirect evidence	Monmouth Junction, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	122 contacts →
	Indirect evidence “MedChemExpress (MCE) is a leading global supplier of life science reagents, dedicated to providing innovative solutions for scientific research and drug development.” Source: RevenueBase Database · checked Sep 17, 2026
18	Origene	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 17, 2026	201-500	119 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
19	Eurofins Discoverx	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	51-200	116 contacts →
	Indirect evidence “Eurofins DiscoverX, the products company of Eurofins Discovery, is committed to enabling and accelerating multi-modality drug discovery and development from discovery to QC lot…” Source: RevenueBase Database · checked Sep 17, 2026
20	Invivogen	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	51-200	115 contacts →
	Indirect evidence “At InvivoGen, we strive to provide life scientists worldwide with innovative, high quality and reliable reagents.” Source: RevenueBase Database · checked Sep 17, 2026
21	BPS Bioscience INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	51-200	115 contacts →
	Indirect evidence “BPS Bioscience advances new scientific discoveries that lead to therapies by creating innovative solutions for research.” Source: RevenueBase Database · checked Sep 17, 2026
22	AVS BIO	Indirect evidence	Norwich, CT, United StatesHQ checked Sep 17, 2026	201-500	112 contacts →
	Indirect evidence “AVS Bio \| Biologics Start Here For more than 60 years, AVS Bio has been a trusted partner in scientific innovation, providing core biological materials and services that fuel…” Source: RevenueBase Database · checked Sep 17, 2026
23	Maravai Lifesciences	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	501-1,000	107 contacts →
	Indirect evidence “Maravai brands set the standard in nucleic acid products and services, enzyme development, and biologics safety testing.” Source: RevenueBase Database · checked Sep 17, 2026
24	Lampire Biological Laboratories, INC	Indirect evidence	Pipersville, PA, United StatesHQ checked Sep 17, 2026	51-200	106 contacts →
	Indirect evidence “Discover the World of LAMPIRE Biological Laboratories!” Source: RevenueBase Database · checked Sep 17, 2026
25	Meridian Life Science, INC	Strong evidence	Memphis, TN, United StatesHQ checked Sep 17, 2026	501-1,000	105 contacts →
	Strong evidence “Meridian LIfe Science is a leading large-scale manufacturer of antibodies, viral antigens, recombinant proteins, blockers, PCR enzymes, nucleotides, and critical assay reagents.” 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: recombinant protein manufacturers. 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 recombinant protein manufacturers.
Partial evidence: Its own public description names part of recombinant protein manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name recombinant protein manufacturers. 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 348 recombinant protein manufacturers based in the United States

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Recombinant protein manufacturers based in the United States at a glance

As of Sep 17, 2026

46.1%Verified-email coverage

39.0Average contacts per company

11-50Median size (employees)

10.6%Largest-city concentration · San Diego

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

135

11-50

119

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 348 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 recombinant protein manufacturers, 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 the United States whose own description of what they do matches “recombinant protein manufacturers”. 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 recombinant protein manufacturers), 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 recombinant protein manufacturers, and records with no verified work email. Companies headquartered outside United States 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, 6,258 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.

Recombinant protein manufacturers by metro

Recombinant protein manufacturers in San Diego37

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 recombinant protein manufacturers, 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 recombinant protein manufacturers are there based in the United States?

RevenueBase identified 348 recombinant protein manufacturers headquartered in the 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?

KBI Biopharma, headquartered in Durham, tops this list with the largest team on record.

Which city has the most recombinant protein manufacturers?

San Diego leads with 37 headquartered companies, followed by Boston (10) and Houston (7).

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 6,258 verified decision-maker contacts tracked across these 348 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.