Company lists · Data refreshed September 2026

Top 23 Oncology biotech companies based in South San Francisco, United States

Name: Oncology biotech companies based in South San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 29 companies tracked

RevenueBase identified 29 oncology biotech companies headquartered in South San Francisco, United States as of September 2026 and tracks 18,678 professional contacts across them, including 9,001 with verified work emails. San Diego is the largest hub.

This list covers oncology biotech companies headquartered in South San Francisco, 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

29Companies

18,678Contacts tracked

9,001Verified emails

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The 23 largest oncology biotech companies based in South San Francisco, United States

Ranked by team size

Top 23 of 29 oncology biotech companies based in South San Francisco, 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 biotech 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	Genentech	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	10001+	17,217 contacts →
	Indirect evidence “About Genentech We're passionate about finding solutions for people facing the world's most difficult-to-treat conditions.” Source: RevenueBase Database · checked Sep 17, 2026
2	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
3	Ideaya Biosciences	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	224 contacts →
	Partial evidence “IDEAYA is an oncology-focused precision medicine company.” Source: RevenueBase Database · checked Sep 17, 2026
4	Onyx Pharmaceuticals, Inc., An Amgen Subsidiary	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	501-1,000	223 contacts →
	Indirect evidence “Formerly based in South San Francisco, California, Onyx Pharmaceuticals was engaged in the development and commercialization of innovative therapies for improving the lives of…” Source: RevenueBase Database · checked Sep 17, 2026
5	Oric Pharmaceuticals INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	123 contacts →
	Indirect evidence “ORIC Pharmaceuticals is a clinical stage biopharmaceutical company dedicated to improving patients’ lives by Overcoming Resistance In Cancer.” Source: RevenueBase Database · checked Sep 17, 2026
6	Cytomx Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	100 contacts →
	Indirect evidence “CytomX Therapeutics, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
7	Abdera Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	74 contacts →
	Indirect evidence “Abdera Therapeutics Inc.” Source: RevenueBase Database · checked Sep 17, 2026
8	Pionyr Immunotherapeutics	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	68 contacts →
	Partial evidence “In 2015, Pionyr Immunotherapeutics embarked on a journey to forge a new path in immuno-oncology for patients in need.” Source: RevenueBase Database · checked Sep 17, 2026
9	ALX Oncology	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	58 contacts →
	Strong evidence “ALX Oncology (Nasdaq: ALXO) is a clinical-stage biotechnology company advancing therapies that boost the immune system to treat cancer and extend patients’ lives.” Source: RevenueBase Database · checked Sep 17, 2026
10	Remegen Biosciences	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	36 contacts →
	Indirect evidence “RemeGen Biosciences is a biopharmaceutical company, focusing on the discovery and development of innovative medicines for the treatment of cancer and autoimmune diseases, based in…” Source: RevenueBase Database · checked Sep 17, 2026
11	3t Biosciences	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	32 contacts →
	Indirect evidence “3T is an immunotherapy company developing next-generation, transformative therapies for the treatment of solid tumors and other immune-mediated diseases in broad patient…” Source: RevenueBase Database · checked Sep 17, 2026
12	Atreca, INC	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	29 contacts →
	Partial evidence “Atreca is a biotechnology company that develops novel therapeutics through a deep understanding of the human immune response, with a focus on innovative novel cancer…” Source: RevenueBase Database · checked Sep 17, 2026
13	Calithera Biosciences	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	51-200	28 contacts →
	Indirect evidence “Calithera Biosciences is a clinical-stage biopharmaceutical company pioneering the discovery and development of targeted therapies that disrupt cellular metabolic pathways to…” Source: RevenueBase Database · checked Sep 17, 2026
14	Link Cell Therapies	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	27 contacts →
	Indirect evidence “Link Cell Therapies was launched by Stanford founders Robbie Majzner and Crystal Mackall in partnership with investors Samsara BioCapital and Sheatree Capital.” Source: RevenueBase Database · checked Sep 17, 2026
15	Convergent Genomics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	26 contacts →
	Indirect evidence “Convergent Genomics is a precision medicine company that combines advances in genomics and machine learning to detect cancer early and non-invasively.” Source: RevenueBase Database · checked Sep 17, 2026
16	Tizona Therapeutics, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	22 contacts →
	Indirect evidence “Tizona Therapeutics, Inc, is an immunology company harnessing the power of the immune system to develop treatments for cancer and autoimmune diseases.” Source: RevenueBase Database · checked Sep 17, 2026
17	Pact Pharma	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	20 contacts →
	Indirect evidence “At PACT Pharma, our vision is to create potentially curative T cell therapies for solid cancers that are tailored for each and every patient.” Source: RevenueBase Database · checked Sep 17, 2026
18	Cero Therapeutics, INC	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	15 contacts →
	Partial evidence “At CERo, we are expanding the armamentarium of engineered cell therapies to create a whole new class of innovative medicines for oncology.” Source: RevenueBase Database · checked Sep 17, 2026
19	Leapfrog BIO	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “Leapfrog Bio is a clinical-stage precision oncology company accelerating cancer drug development by identifying clinical-stage molecules that can be retargeted as directed…” Source: RevenueBase Database · checked Sep 17, 2026
20	Qlsf Biotherapeutics, INC	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	11-50	12 contacts →
	Strong evidence “QLSF Biotherapeutics is an innovative immuno-oncology biotech startup in South San Francisco.” Source: RevenueBase Database · checked Sep 17, 2026
21	Synlico INC	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1-10	9 contacts →
	Partial evidence “Synlico is a patient-native causal AI biotech building a generative causal discovery and inference platform SynCausal(TM) that learns directed gene causal graphs from primary…” Source: RevenueBase Database · checked Sep 17, 2026
22	Tegmine Therapeutics, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1-10	7 contacts →
	Indirect evidence “At Tegmine we target glycoproteins, which are a hallmark of numerous solid cancers and drive aggressive disease.” Source: RevenueBase Database · checked Sep 17, 2026
23	Primevax Immuno-Oncology	Partial evidence	South San Francisco, CA, United StatesHQ checked Sep 17, 2026	1-10	5 contacts →
	Partial evidence “PrimeVax Immuno-Oncology, Inc.” 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 biotech 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 biotech companies.
Partial evidence: Its own public description names part of oncology biotech companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oncology biotech 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 23 of 29 oncology biotech companies based in South San Francisco, United States

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Oncology biotech companies based in South San Francisco, United States at a glance

As of Sep 17, 2026

48.2%Verified-email coverage

644.1Average contacts per company

11-50Median size (employees)

272.4%Largest-city concentration · San Diego

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

Email recency for this list is measured across the whole United States list rather than for South San Francisco, so it is reported there. Company counts and contact totals on this page are exact for South San Francisco, over 29 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 biotech 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 South San Francisco, United States whose own description of what they do matches “oncology biotech 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 biotech 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 biotech companies, and records with no verified work email. Companies headquartered outside South San Francisco 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, 9,001 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.

Oncology biotech companies by metro in the United States

Oncology biotech companies in San Diego79
Oncology biotech companies in Cambridge73
Oncology biotech companies in New York54
Oncology biotech companies in Boston40
Oncology biotech companies in South San Francisco29
Oncology biotech companies in Houston28

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 biotech 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 biotech companies are there based in South San Francisco, United States?

RevenueBase identified 29 oncology biotech companies headquartered in South San Francisco, 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?

Genentech, headquartered in South San Francisco, tops this list with the largest team on record.

Which city has the most oncology biotech companies?

San Diego leads with 79 headquartered companies, followed by Cambridge (73) and New York (54).

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 9,001 verified decision-maker contacts tracked across these 29 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.