Company lists · Data refreshed September 2026

Top 25 Antibody engineering companies based in the United States

Name: Antibody engineering companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 431 companies tracked

RevenueBase identified 431 antibody engineering companies headquartered in the United States as of September 2026 and tracks 13,205 professional contacts across them, including 5,583 with verified work emails. San Diego is the largest hub.

This list covers antibody engineering companies 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 30, 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 30, 2026 86% judged on-target in blind review

431Companies

13,205Contacts tracked

5,583Verified emails

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The 25 largest antibody engineering companies based in the United States

Ranked by team size

Top 25 of 431 antibody engineering companies based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to antibody engineering 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	Genscript	Indirect evidence	Piscataway, NJ, United StatesHQ checked Sep 30, 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 30, 2026
2	Cell Signaling Technology CST	Indirect evidence	Danvers, MA, United StatesHQ checked Sep 30, 2026	501-1,000	678 contacts →
	Indirect evidence “Founded by research scientists in Cell Signaling Technology (CST) is a private, family-owned company that prides itself on operating as a research institute developing quality…” Source: RevenueBase Database · checked Sep 30, 2026
3	Sdix LLC	Partial evidence	Newark, DE, United StatesHQ checked Sep 30, 2026	51-200	559 contacts →
	Partial evidence “SDIX, a wholly owned subsidiary of OriGene Technologies specializing in high quality, large-scale, GMP antibody production.” Source: RevenueBase Database · checked Sep 30, 2026
4	ABEC	Indirect evidence	Bethlehem, PA, United StatesHQ checked Sep 30, 2026	501-1,000	430 contacts →
	Indirect evidence “ABEC engineered solutions and services for biotech manufacturing Since 1974, ABEC has been a global leader in delivering integrated process solutions and services for…” Source: RevenueBase Database · checked Sep 30, 2026
5	Macrogenics, INC	Partial evidence	Rockville, MD, United StatesHQ checked Sep 30, 2026	201-500	408 contacts →
	Partial evidence “MacroGenics is a leader in the discovery and development of innovative medicines that utilize our next generation antibody-based technologies.” Source: RevenueBase Database · checked Sep 30, 2026
6	Xencor	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 30, 2026	201-500	281 contacts →
	Indirect evidence “Designing Proteins.” Source: RevenueBase Database · checked Sep 30, 2026
7	Scantibodies Laboratory, INC	Partial evidence	Santee, CA, United StatesHQ checked Sep 30, 2026	501-1,000	250 contacts →
	Partial evidence “In vitro diagnostic company, specializing in the production of antibodies, controls, blockers including HBR- Clean Rooms - Filling - Finishing - Packaging - Sub-Assembly -…” Source: RevenueBase Database · checked Sep 30, 2026
8	Proteintech Group	Indirect evidence	Rosemont, IL, United StatesHQ checked Sep 30, 2026	201-500	240 contacts →
	Indirect evidence “For when you need it all.” Source: RevenueBase Database · checked Sep 30, 2026
9	Biocytogen	Partial evidence	Waltham, MA, United StatesHQ checked Sep 30, 2026	1,001-5,000	188 contacts →
	Partial evidence “Biocytogen provides integrated solutions for next-generation antibody drug development to the global biomedical communities.” Source: RevenueBase Database · checked Sep 30, 2026
10	Probio	Indirect evidence	Pennington, NJ, United StatesHQ checked Sep 30, 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 30, 2026
11	Enzo Life Sciences, INC	Indirect evidence	Farmingdale, NY, United StatesHQ checked Sep 30, 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 30, 2026
12	Invivyd	Indirect evidence	New Haven, CT, United StatesHQ checked Sep 30, 2026	51-200	153 contacts →
	Indirect evidence “Invivyd, Inc.(Nasdaq: IVVD) creates medicines that are more potent and resistant to virus evolution than the human immune system.” Source: RevenueBase Database · checked Sep 30, 2026
13	Acrobiosystems	Indirect evidence	Newark, DE, United StatesHQ checked Sep 30, 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 30, 2026
14	KPL Part Of LGC Clinical Diagnostics	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 30, 2026	51-200	151 contacts →
	Indirect evidence “LGC Clinical Diagnostics’ KPL portfolio includes a range of over 800 reagents and kits for immunoassays, immunohistochemistry, infectivity assays and flow cytometry.” Source: RevenueBase Database · checked Sep 30, 2026
15	Adimab	Strong evidence	Lebanon, NH, United StatesHQ checked Sep 30, 2026	51-200	150 contacts →
	Strong 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 30, 2026
16	Visterra INC	Partial evidence	Waltham, MA, United StatesHQ checked Sep 30, 2026	51-200	146 contacts →
	Partial evidence “Visterra is a clinical stage biotechnology company committed to developing innovative antibody-based therapies for the treatment of patients with kidney diseases and other…” Source: RevenueBase Database · checked Sep 30, 2026
17	Alloy Therapeutics, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 30, 2026	51-200	141 contacts →
	Indirect evidence “Alloy Therapeutics is a Product Development Organization dedicated to helping the global scientific community make better medicines together.” Source: RevenueBase Database · checked Sep 30, 2026
18	Vector Laboratories, INC	Indirect evidence	Newark, CA, United StatesHQ checked Sep 30, 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 30, 2026
19	Integral Molecular	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 30, 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 30, 2026
20	IGM Biosciences, INC	Indirect evidence	Mountain View, CA, United StatesHQ checked Sep 30, 2026	51-200	135 contacts →
	Indirect evidence “About IGM Biosciences, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
21	Inhibrx Biosciences, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 30, 2026	51-200	130 contacts →
	Indirect evidence “At Inhibrx, our mission is to deliver optimized, biologic therapeutics to people with life-threatening conditions.” Source: RevenueBase Database · checked Sep 30, 2026
22	Origene	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 30, 2026	201-500	119 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
23	Invivogen	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 30, 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 30, 2026
24	BPS Bioscience INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 30, 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 30, 2026
25	AVS BIO	Indirect evidence	Norwich, CT, United StatesHQ checked Sep 30, 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 30, 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: antibody engineering 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 antibody engineering companies.
Partial evidence: Its own public description names part of antibody engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name antibody engineering 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 431 antibody engineering companies based in the United States

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Antibody engineering companies based in the United States at a glance

As of Sep 30, 2026

42.3%Verified-email coverage

30.6Average contacts per company

11-50Median size (employees)

9.3%Largest-city concentration · San Diego

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

184

11-50

141

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 431 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 antibody engineering 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 the United States whose own description of what they do matches “antibody engineering 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 antibody engineering 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 antibody engineering companies, 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, 5,583 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 30, 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.

Antibody engineering companies by metro

Antibody engineering companies in San Diego40

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 antibody engineering 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 antibody engineering companies are there based in the United States?

RevenueBase identified 431 antibody engineering companies 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?

Genscript, headquartered in Piscataway, tops this list with the largest team on record.

Which city has the most antibody engineering companies?

San Diego leads with 40 headquartered companies, followed by Boston (15) and Cambridge (15).

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 5,583 verified decision-maker contacts tracked across these 431 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 30, 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.