Company lists · Data refreshed September 2026

Top 25 Oncology pharmaceutical companies based in the United States

Name: Oncology pharmaceutical 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 17, 2026 357 companies tracked

RevenueBase identified 357 oncology pharmaceutical companies headquartered in the United States as of September 2026 and tracks 52,790 professional contacts across them, including 19,624 with verified work emails. San Diego is the largest hub.

This list covers oncology pharmaceutical 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 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

357Companies

52,790Contacts tracked

19,624Verified emails

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The 25 largest oncology pharmaceutical companies based in the United States

Ranked by team size

Top 25 of 357 oncology pharmaceutical companies 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 oncology pharmaceutical 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	Gilead Sciences	Indirect evidence	Foster City, CA, United StatesHQ checked Sep 17, 2026	10001+	13,864 contacts →
	Indirect evidence “At Gilead, we set – and achieve – bold ambitions to create a healthier world for all people.” Source: RevenueBase Database · checked Sep 17, 2026
2	Eisai US	Indirect evidence	Nutley, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,570 contacts →
	Indirect evidence “At Eisai Inc, human health care (hhc) is our goal.” Source: RevenueBase Database · checked Sep 17, 2026
3	Beigene	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 17, 2026	n/a	2,135 contacts →
	Indirect evidence “Effective March 17, 2025, The U.S.” Source: RevenueBase Database · checked Sep 17, 2026
4	Celgene	Indirect evidence	Summit, NJ, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,098 contacts →
	Indirect evidence “We have merged with Bristol Myers Squibb creating a leading biopharma company, ideally positioned to discover, develop and deliver innovative medicines for patients fighting…” Source: RevenueBase Database · checked Sep 17, 2026
5	Exelixis	Indirect evidence	Alameda, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,426 contacts →
	Indirect evidence “Every Exelixis employee is united in an ambitious cause: to transform science into new treatments that give cancer patients and their families hope for the future.” Source: RevenueBase Database · checked Sep 17, 2026
6	Sarah Cannon Research Institute	Partial evidence	Nashville, TN, United StatesHQ checked Sep 17, 2026	501-1,000	868 contacts →
	Partial evidence “Sarah Cannon Research Institute (SCRI) is one of the world’s leading oncology research organizations, conducting community-based clinical trials.” Source: RevenueBase Database · checked Sep 17, 2026
7	Seagen	Indirect evidence	Bothell, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	857 contacts →
	Indirect evidence “Seagen is now part of Pfizer!” Source: RevenueBase Database · checked Sep 17, 2026
8	NEW York Cancer & Blood Specialists	Partial evidence	Port Jefferson Station, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	783 contacts →
	Partial evidence “As a comprehensive community oncology center, NYCBS delivers world-class cancer care close to home.” Source: RevenueBase Database · checked Sep 17, 2026
9	American Society Of Clinical Oncology Asco	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 17, 2026	201-500	751 contacts →
	Partial evidence “Founded in 1964, the American Society of Clinical Oncology (ASCO) is committed to making a world of difference in cancer care.” Source: RevenueBase Database · checked Sep 17, 2026
10	UT MD Anderson Cancer Center	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	n/a	683 contacts →
	Indirect evidence “UT MD ANDERSON CANCER CENTER is a hospital & health care company based out of 1515 HOLCOMBE BLVD, Houston, Texas, United States.” Source: RevenueBase Database · checked Sep 17, 2026
11	Menarini Stemline	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	501-1,000	677 contacts →
	Partial evidence “The Menarini Group ("Menarini"), a leading Italian pharmaceutical and diagnostics company, and Stemline Therapeutics, Inc.("Stemline"), a wholly-owned subsidiary of the Menarini…” Source: RevenueBase Database · checked Sep 17, 2026
12	Arcus Biosciences	Indirect evidence	Hayward, CA, United StatesHQ checked Sep 17, 2026	501-1,000	632 contacts →
	Indirect evidence “Arcus Biosciences is a rapidly growing, clinical-stage, global biopharmaceutical company developing differentiated molecules and combination medicines that may have the potential…” Source: RevenueBase Database · checked Sep 17, 2026
13	Onco360 Oncology Pharmacy	Partial evidence	Louisville, KY, United StatesHQ checked Sep 17, 2026	501-1,000	630 contacts →
	Partial evidence “Onco360 is recognized as one of the nation's leading independent specialty pharmacies dedicated exclusively to oncology and rare disease patients.” Source: RevenueBase Database · checked Sep 17, 2026
14	Crown Bioscience	Partial evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	441 contacts →
	Partial evidence “Crown Bioscience, a JSR Life Sciences company, is a global contract research organization (CRO) providing discovery, preclinical, and translational platforms to advance oncology…” Source: RevenueBase Database · checked Sep 17, 2026
15	Eikon Therapeutics	Indirect evidence	Millbrae, CA, United StatesHQ checked Sep 17, 2026	201-500	423 contacts →
	Indirect evidence “Eikon Therapeutics is a late-stage clinical biopharmaceutical company advancing a pipeline of potential therapies for patients with unmet medical needs.” Source: RevenueBase Database · checked Sep 17, 2026
16	Macrogenics, INC	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 17, 2026	201-500	408 contacts →
	Indirect 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 17, 2026
17	Taiho Oncology, INC	Partial evidence	Princeton, NJ, United StatesHQ checked Sep 17, 2026	201-500	405 contacts →
	Partial evidence “The mission of Taiho Oncology, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
18	The Oncology Institute	Partial evidence	Cerritos, CA, United StatesHQ checked Sep 17, 2026	501-1,000	404 contacts →
	Partial evidence “Founded in 2007, The Oncology Institute (NASDAQ: TOI) is advancing oncology by delivering highly specialized, value-based cancer care in the community setting.” Source: RevenueBase Database · checked Sep 17, 2026
19	Syndax Pharmaceuticals	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	336 contacts →
	Partial evidence “Syndax Pharmaceuticals is a commercial-stage biopharmaceutical company advancing innovative cancer therapies.” Source: RevenueBase Database · checked Sep 17, 2026
20	Kura Oncology, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	201-500	294 contacts →
	Partial evidence “Kura Oncology is a commercial-stage biopharmaceutical company committed to discovering and developing innovative precision medicines to help patients with cancer lead better…” Source: RevenueBase Database · checked Sep 17, 2026
21	Sutro Biopharma, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	201-500	282 contacts →
	Indirect evidence “Sutro Biopharma, Inc, is relentlessly focused on the discovery and development of precisely designed cancer therapeutics to transform what science can do for patients.” Source: RevenueBase Database · checked Sep 17, 2026
22	Vaniam Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	201-500	280 contacts →
	Partial evidence “Vaniam Group is the integrated oncology organization built for what’s next, built on twenty years of scientific depth, sustained engagement across the oncology community, and…” Source: RevenueBase Database · checked Sep 17, 2026
23	The Start Center For Cancer Care	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	201-500	267 contacts →
	Indirect evidence “At The START Center for Cancer Care our mission is to deliver high-quality care for our patients, accelerate the development of new cancer treatments, and provide hope for those…” Source: RevenueBase Database · checked Sep 17, 2026
24	Puma Biotechnology, INC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 17, 2026	201-500	254 contacts →
	Indirect evidence “At Puma Biotechnology, our focus is on bringing innovative therapies to patients to enhance cancer care.” Source: RevenueBase Database · checked Sep 17, 2026
25	Ontada	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	501-1,000	246 contacts →
	Partial evidence “We are an oncology data, research and technology business dedicated to improving the lives of patients and transforming the fight against cancer.” 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: oncology pharmaceutical 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 oncology pharmaceutical companies.
Partial evidence: Its own public description names part of oncology pharmaceutical companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oncology pharmaceutical 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 357 oncology pharmaceutical companies based in the United States

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Oncology pharmaceutical companies based in the United States at a glance

As of Sep 17, 2026

37.2%Verified-email coverage

147.9Average contacts per company

11-50Median size (employees)

5.9%Largest-city concentration · San Diego

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

122

11-50

104

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 357 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 oncology pharmaceutical 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 “oncology pharmaceutical 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 oncology pharmaceutical 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 oncology pharmaceutical 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, 19,624 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.

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 oncology pharmaceutical 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 oncology pharmaceutical companies are there based in the United States?

RevenueBase identified 357 oncology pharmaceutical 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?

Gilead Sciences, headquartered in Foster City, tops this list with the largest team on record.

Which city has the most oncology pharmaceutical companies?

San Diego leads with 21 headquartered companies, followed by New York (15) and Boston (13).

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 19,624 verified decision-maker contacts tracked across these 357 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.