Company lists · Data refreshed September 2026

Top 23 Immunotherapy developers based in Philadelphia, United States

Name: Immunotherapy developers based in Philadelphia, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 32 companies tracked

RevenueBase identified 32 immunotherapy developers headquartered in Philadelphia, United States as of September 2026 and tracks 1,297 professional contacts across them, including 806 with verified work emails. San Diego is the largest hub.

This list covers immunotherapy developers headquartered in Philadelphia, 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 20, 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 20, 2026 86% judged on-target in blind review

32Companies

1,297Contacts tracked

806Verified emails

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The 23 largest immunotherapy developers based in Philadelphia, United States

Ranked by team size

Top 23 of 32 immunotherapy developers based in Philadelphia, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to immunotherapy developers: 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	The Wistar Institute	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	201-500	436 contacts →
	Indirect evidence “The Wistar Institute is the nation’s first independent nonprofit institution devoted exclusively to foundational biomedical research and training.” Source: RevenueBase Database · checked Sep 20, 2026
2	Cabaletta BIO	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	51-200	180 contacts →
	Indirect evidence “Cabaletta Bio (Nasdaq: CABA) is a clinical-stage biotechnology company focused on the discovery and development of engineered T cell therapies that have the potential to provide a…” Source: RevenueBase Database · checked Sep 20, 2026
3	Century Therapeutics, INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	51-200	155 contacts →
	Indirect evidence “Century Therapeutics is an innovative biotechnology company that is building an industry-leading, allogeneic, iPSC-derived cell therapy platform that integrates cutting-edge gene…” Source: RevenueBase Database · checked Sep 20, 2026
4	Gemma Biotherapeutics	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	51-200	56 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
5	Fore Biotherapeutics	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	56 contacts →
	Indirect evidence “We are a precision oncology company pioneering the development of cancer therapies aimed at patients with unaddressed mutations across well-established oncology targtes.” Source: RevenueBase Database · checked Sep 20, 2026
6	ARO Biotherapeutics	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	55 contacts →
	Indirect evidence “Unlocking the Potential of Genetic Medicines Based in Philadelphia, Aro Biotherapeutics is a biotechnology company pioneering the development of tissue-targeted genetic medicines…” Source: RevenueBase Database · checked Sep 20, 2026
7	Carisma Therapeutics	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	51-200	51 contacts →
	Indirect evidence “Carisma Therapeutics Inc.” Source: RevenueBase Database · checked Sep 20, 2026
8	Third ARC BIO	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “Third Arc Bio is a biotech company developing multifunctional antibodies that generate immune synapses that precisely activate or inhibit T cells.” Source: RevenueBase Database · checked Sep 20, 2026
9	Interius Biotherapeutics	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “Interius BioTherapeutics is now part of Kite, a Gilead Company.” Source: RevenueBase Database · checked Sep 20, 2026
10	Imvax, INC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	29 contacts →
	Partial evidence “Imvax is a clinical-stage biotechnology company developing personalized, whole tumor-derived immunotherapies.” Source: RevenueBase Database · checked Sep 20, 2026
11	Verismo Therapeutics	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	27 contacts →
	Partial evidence “Verismo Therapeutics is pioneering the development of novel chimeric antigen receptors (CARs) that enhance T-cell-based cellular immunotherapy for cancer, especially…” Source: RevenueBase Database · checked Sep 20, 2026
12	Context Therapeutics	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	22 contacts →
	Indirect evidence “Context Therapeutics Inc.(Nasdaq: CNTX) is a biopharmaceutical company advancing T cell engaging ("TCE") bispecific antibodies for solid tumors.” Source: RevenueBase Database · checked Sep 20, 2026
13	Briacell Therapeutics Corp	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	19 contacts →
	Partial evidence “BriaCell Therapeutics Corp.(Nasdaq: BCTX, BCTXW)(TSX: BCT) is a clinical-stage biotechnology company that develops novel immunotherapies to transform cancer care.” Source: RevenueBase Database · checked Sep 20, 2026
14	Chimeron BIO	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1-10	13 contacts →
	Indirect evidence “Chimeron Bio is an early-stage biotechnology company developing innovative, off-the-shelf therapies to transform cancer treatment.” Source: RevenueBase Database · checked Sep 20, 2026
15	Vittoria Biotherapeutics, INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Vittoria Biotherapeutics is committed to unlocking the promise of cell therapies while addressing their inherent challenges by strengthening efficacy, improving safety, and…” Source: RevenueBase Database · checked Sep 20, 2026
16	Avammune Therapeutics	Partial evidence	Philadelphia, United StatesHQ checked Sep 20, 2026	11-50	12 contacts →
	Partial evidence “Avammune Therapeutics is a drug discovery company focused on the development of novel immunotherapeutics to address high unmet medical needs.” Source: RevenueBase Database · checked Sep 20, 2026
17	Seneca Therapeutics, INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1-10	9 contacts →
	Indirect evidence “Seneca Therapeutics was found by Dr.” Source: RevenueBase Database · checked Sep 20, 2026
18	Vetigenics INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “At Vetigenics, we harness the power of the animal's own immune system to bring the latest advancements in biotechnology to improve pet health.” Source: RevenueBase Database · checked Sep 20, 2026
19	Avstera Therapeutics Corp	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1-10	7 contacts →
	Indirect evidence “Specialty oncology-focused biopharmaceutical company based in Malvern, PA with a broad pipeline encompassing novel best in class selective HDAC6i immunomodulators and a game…” Source: RevenueBase Database · checked Sep 20, 2026
20	Hula Therapeutics	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1-10	6 contacts →
	Partial evidence “Hula Therapeutics is a clinical-stage precision immunotherapy company focused on developing treatments for patients with solid cancers.” Source: RevenueBase Database · checked Sep 20, 2026
21	Syzonc	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “SyzOnc is developing tumor microenvironment modulators for cancer patients using a tech-enabled, systems-level approach.” Source: RevenueBase Database · checked Sep 20, 2026
22	Therimunex Pharmaceuticals, INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “TherimuneX, with laboratories at the Pennsylvania Biotechnology Center of Bucks County in Doylestown, is developing technology relating to a new family of endogenous lipopeptides…” Source: RevenueBase Database · checked Sep 20, 2026
23	Vironika, LLC	Indirect evidence	Philadelphia, United StatesHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Vironika, LLC, is an early stage drug discovery company dedicated to developing novel drugs to block deadly tumor viruses from forming cancers.” Source: RevenueBase Database · checked Sep 20, 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: immunotherapy developers. 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 immunotherapy developers.
Partial evidence: Its own public description names part of immunotherapy developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name immunotherapy developers. 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 23 of 32 immunotherapy developers based in Philadelphia, United States

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Immunotherapy developers based in Philadelphia, United States at a glance

As of Sep 20, 2026

62.1%Verified-email coverage

40.5Average contacts per company

11-50Median size (employees)

400.0%Largest-city concentration · San Diego

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Philadelphia, so it is reported there. Company counts and contact totals on this page are exact for Philadelphia, over 32 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 immunotherapy developers, 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 Philadelphia, United States whose own description of what they do matches “immunotherapy developers”. 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 immunotherapy developers), 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 immunotherapy developers, and records with no verified work email. Companies headquartered outside Philadelphia 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, 806 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 20, 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.

Immunotherapy developers by metro in the United States

Immunotherapy developers in San Diego128
Immunotherapy developers in Cambridge117
Immunotherapy developers in Boston80
Immunotherapy developers in New York66
Immunotherapy developers in South San Francisco56
Immunotherapy developers in San Francisco49
Immunotherapy developers in Seattle44
Immunotherapy developers in Houston41
Immunotherapy developers in Los Angeles32
Immunotherapy developers in Philadelphia32
Immunotherapy developers in Waltham26

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 immunotherapy developers, 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 immunotherapy developers are there based in Philadelphia, United States?

RevenueBase identified 32 immunotherapy developers headquartered in Philadelphia, 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?

The Wistar Institute, headquartered in Philadelphia, tops this list with the largest team on record.

Which city has the most immunotherapy developers?

San Diego leads with 128 headquartered companies, followed by Cambridge (117) and Boston (80).

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 806 verified decision-maker contacts tracked across these 32 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 20, 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.