Company lists · Data refreshed September 2026

Top 25 Immunodeficiency syndromes gene therapy companies based in the United States

RevenueBase identified 89 company matches for immunodeficiency syndromes gene therapy companies associated with the United States as of September 2026 and tracks 4,440 professional contacts across them, including 2,348 with verified work emails. Boston is the largest hub.

This list covers company matches for immunodeficiency syndromes gene therapy companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built
89Companies
4,440Contacts tracked
2,348Verified emails
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The 25 largest immunodeficiency syndromes gene therapy companies based in the United States

Ranked by team size
Top 25 of 89 company matches for immunodeficiency syndromes gene therapy companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Diego, CA, United StatesHQ recorded Sep 19, 2026501-1,000591 contacts →

Exact match

“ImmunityBio, Inc.(formerly NantKwest, Inc.) is developing cell and immunotherapy products that are designed to help strengthen each patient’s natural immune system, potentially…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchResearch Triangle Park, NC, United StatesHQ recorded Sep 19, 2026501-1,000510 contacts →

Exact match

“AskBio Inc, a wholly owned and independently operated subsidiary of Bayer AG, is a fully integrated gene therapy company dedicated to developing life-saving medicines and changing…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchColumbus, OH, United StatesHQ recorded Sep 19, 2026201-500456 contacts →

Exact match

“Forge, a member of Ajinomoto Bio-Pharma Services, is a gene therapy development engine, focused on enabling access to life changing gene therapies and helping bring them from idea…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchSeattle, WA, United StatesHQ recorded Sep 19, 2026201-500287 contacts →

Exact match

“Sana Biotechnology is focused on utilizing engineered cells as medicines for patients.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchCranbury, NJ, United StatesHQ recorded Sep 19, 2026201-500258 contacts →

Exact match

“Rocket Pharma (NASDAQ: RCKT) is a fully-integrated, clinical-stage company seeking gene therapy cures.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchBoston, MA, United StatesHQ recorded Sep 19, 202651-200160 contacts →

Exact match

“Solid Biosciences is a precision genetic medicine company focused on advancing a portfolio of gene therapy candidates targeting rare neuromuscular and cardiac diseases, including…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchRockville, MD, United StatesHQ recorded Sep 19, 202651-200115 contacts →

Exact match

“Ascend is gene to GMP partner with deep expertise in advanced therapy development and commercialization.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchNewbury Park, CA, United StatesHQ recorded Sep 19, 202651-200109 contacts →

Exact match

“Capsida Biotherapeutics Inc.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchBoston, MA, United StatesHQ recorded Sep 19, 202611-5066 contacts →

Exact match

“Kelonia is pioneering a new wave of genetic medicines using its next generation gene delivery platform.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchWaltham, MA, United StatesHQ recorded Sep 19, 202651-20062 contacts →

Exact match

“We are a team with decades of proven success in translating science from bench to bedside across many companies and medicines, in gene therapy and beyond.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchPhiladelphia, PA, United StatesHQ recorded Sep 19, 202651-20056 contacts →

Exact match

“GEMMABio, a new therapeutics company, will serve as the research and innovation arm to speed the research of and global access to life-changing advanced therapies for those living…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchLake Forest, IL, United StatesHQ recorded Sep 19, 202651-20053 contacts →

Exact match

“Jaguar Gene Therapy, LLC is dedicated to accelerating breakthroughs in gene therapy for patients suffering from severe genetic diseases including those that impact sizeable…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchSan Carlos, CA, United StatesHQ recorded Sep 19, 202611-5052 contacts →

Exact match

“GigaGen, a subsidiary of Grifols, is advancing transformative antibody drugs for immune deficiency, infectious diseases and checkpoint resistant cancers by leveraging…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchSan Marino, CA, United StatesHQ recorded Sep 19, 202651-20048 contacts →

Exact match

“GenVivo was founded on the idea that we can effectively treat cancer patients with the latest gene delivery technologies.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchMonrovia, CA, United StatesHQ recorded Sep 19, 2026n/a35 contacts →

Exact match

“Rampart Bioscience is evolving a new class of medicines for patients with genetically driven diseases.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchRockville, MD, United StatesHQ recorded Sep 19, 202611-5033 contacts →

Exact match

“American Gene Technologies® International Inc.(AGT™) is a private biotechnology company pursuing cures and treatments for infectious diseases, cancers, and monogenic disorders.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchGaithersburg, MD, United StatesHQ recorded Sep 19, 202611-5029 contacts →

Exact match

“Born from purpose and for patient access, Vector BioMed is a Public Benefit Corporation engineering the next frontier of lentivirus-based cell and gene therapy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchWaltham, MA, United StatesHQ recorded Sep 19, 202651-20029 contacts →

Exact match

“AlloVir, formerly ViraCyte, was founded in 2013 and is the leader in the development of novel cell therapies with a focus on restoring natural immunity against life-threatening…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchWarren, NJ, United StatesHQ recorded Sep 19, 2026501-1,00027 contacts →

Exact match

“Tevogen Bio brings together a highly skilled team of preeminent scientists, senior biopharmaceutical leaders, and manufacturing experts with the goal of advancing global health.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchOcala, FL, United StatesHQ recorded Sep 19, 202611-5025 contacts →

Exact match

“AIM ImmunoTech Inc, an immuno-pharma company headquartered in Ocala, Florida, is focused on the research and development of therapeutics to treat multiple types of cancers, as…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchWest Palm Beach, FL, United StatesHQ recorded Sep 19, 202651-20024 contacts →

Exact match

“EXUMA Biotech is a clinical-stage biotechnology company developing next-generation in vivo cell and gene therapies.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchAustin, TX, United StatesHQ recorded Sep 19, 202611-5023 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchCarrollton, TX, United StatesHQ recorded Sep 19, 202611-5021 contacts →

Exact match

“Gradalis is a late-stage clinical biotechnology company developing immunotherapies for multiple cancer indications including an upcoming Phase 3 registration trial in patients…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchMilpitas, CA, United StatesHQ recorded Sep 19, 202651-20021 contacts →

Exact match

“ASC Therapeutics focuses on the development of curative therapies for rare diseases.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchCambridge, MA, United StatesHQ recorded Sep 19, 202651-20020 contacts →

Exact match

“Our vision is to bring personalized gene therapy to the world.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 89 immunodeficiency syndromes gene therapy companies based in the United States

See the full list, filter by size, metro and specialty, and access 2,348 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Immunodeficiency syndromes gene therapy companies based in the United States at a glance

As of Sep 19, 2026
52.9%Verified-email coverage
49.9Average contacts per company
11-50Median size (employees)
6.7%Largest-city concentration · Boston
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
39
11-50
22
51-200
16
201-500
8
501-1,000
3
10001+
1

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 89 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “immunodeficiency syndromes gene therapy companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,348 professional contacts with verified work emails across the full matched dataset. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “immunodeficiency syndromes gene therapy companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many immunodeficiency syndromes gene therapy companies are there based in the United States?

RevenueBase identified 89 company matches for immunodeficiency syndromes gene therapy companies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Immunitybio, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most immunodeficiency syndromes gene therapy companies?

Boston leads with 6 company records, followed by San Francisco (6) and Cambridge (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,348 professional contacts with verified work emails tracked across these 89 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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 SmartSearch, 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.