Company lists · Data refreshed September 2026

Top 23 Biopharmaceutical companies based in South San Francisco, United States

Name: Biopharmaceutical 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 14, 2026 45 companies tracked

The South San Francisco biopharmaceutical companies directory lists 45 companies developing and commercializing medicines based on biological products. It includes 20,281 business contacts and 9,509 email addresses for organizations in the category. The directory was updated in September 2026. Across the United States, San Diego is the largest hub for this category (194 companies); South San Francisco has 45.

Biopharmaceutical companies discover, develop, manufacture, or commercialize medicines made from biological sources, including proteins, antibodies, vaccines, and cell or gene therapies. This list covers companies whose primary business includes the research, development, manufacturing, or commercialization of biopharmaceutical products. Ranked by team size, largest first. Data current as of September 14, 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 14, 2026 86% judged on-target in blind review

45Companies

20,281Contacts tracked

9,509Verified emails

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

Ranked by team size

Top 23 of 45 biopharmaceutical companies based in South San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to biopharmaceutical 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 14, 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 14, 2026
2	Sutro Biopharma, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 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 14, 2026
3	Onyx Pharmaceuticals, Inc., An Amgen Subsidiary	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 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 14, 2026
4	Xaira Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	51-200	179 contacts →
	Indirect evidence “Xaira Therapeutics is an integrated biotechnology company driving advances in artificial intelligence to learn the language of life and transform how we treat disease.” Source: RevenueBase Database · checked Sep 14, 2026
5	Alumis	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	125 contacts →
	Indirect evidence “At Alumis, our goal is to significantly improve the lives of patients by replacing broad immunosuppression with targeted therapies.” Source: RevenueBase Database · checked Sep 14, 2026
6	Rapt Therapeutics	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	51-200	123 contacts →
	Strong evidence “RAPT is a clinical-stage immunology-based biopharmaceutical company focused on discovering, developing and commercializing novel therapies for patients living with inflammatory…” Source: RevenueBase Database · checked Sep 14, 2026
7	Septerna	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	51-200	119 contacts →
	Indirect evidence “Septerna is on a mission to make the promise of future GPCR medicines a reality for patients.” Source: RevenueBase Database · checked Sep 14, 2026
8	NGM Biopharmaceuticals	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	116 contacts →
	Strong evidence “NGM Bio is a biopharmaceutical company focused on discovering and developing novel, life-changing medicines for people whose health and lives have been disrupted by disease.” Source: RevenueBase Database · checked Sep 14, 2026
9	Cytomx Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	51-200	100 contacts →
	Indirect evidence “CytomX Therapeutics, Inc.” Source: RevenueBase Database · checked Sep 14, 2026
10	California Life Sciences CLS	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	100 contacts →
	Indirect evidence “California Life Sciences (CLS) is the state’s most impactful life sciences membership organization, advocating for the sector and its diverse innovation pipeline.” Source: RevenueBase Database · checked Sep 14, 2026
11	Circle Pharma, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	75 contacts →
	Indirect evidence “Circle Pharma initiated operations in June 2014 with seed funding from Pfizer, Inc.” Source: RevenueBase Database · checked Sep 14, 2026
12	Star Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	45 contacts →
	Indirect evidence “Star Therapeutics is a biotechnology company focused on the discovery and development of life-changing therapies for diseases with significant unmet need.” Source: RevenueBase Database · checked Sep 14, 2026
13	Gordian Biotechnology	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	43 contacts →
	Indirect evidence “Our mission is to cure age-related disease by moving successful therapeutics toward clinical trials within months, not years.#CreatingTime” Source: RevenueBase Database · checked Sep 14, 2026
14	Remegen Biosciences	Strong evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	51-200	36 contacts →
	Strong 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 14, 2026
15	Lyterian Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	31 contacts →
	Indirect evidence “Lyterian Therapeutics derives its name from the Greek word λυτήριος or lutḗrios, that defines the termination, healing, or end of disease.” Source: RevenueBase Database · checked Sep 14, 2026
16	Moonwalk Biosciences	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	25 contacts →
	Indirect evidence “Moonwalk Biosciences is pioneering novel therapeutics in adipose biology and tissue, driven by deep genetic and epigenetic evidence and insights.” Source: RevenueBase Database · checked Sep 14, 2026
17	Apertor Pharmaceuticals	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	1-10	18 contacts →
	Indirect evidence “At Apertor we have developed a new class of therapeutics to address one of the toughest challenges in drug discovery, selective disruption of disease-causing protein-protein…” Source: RevenueBase Database · checked Sep 14, 2026
18	R2m Pharma, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	17 contacts →
	Indirect evidence “R2M Pharma is a fast growing biotechnology research organization devoted to the discovery of high quality small molecules preclinical development compounds for the treatment of…” Source: RevenueBase Database · checked Sep 14, 2026
19	Liveritas Biosciences, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	1-10	16 contacts →
	Indirect evidence “LiVeritas Biosciences enables biopharma companies to fast track drug research & development (R&D) process through mass spectrometry (MS) and digital transformation.” Source: RevenueBase Database · checked Sep 14, 2026
20	Initial Therapeutics	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	15 contacts →
	Indirect evidence “Initial Therapeutics is discovering and developing a new class of small-molecule medicines designed to halt pathogenic protein formation in the earliest stages.” Source: RevenueBase Database · checked Sep 14, 2026
21	Pragma BIO	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	13 contacts →
	Indirect evidence “Pragma Bio exists to find cures for undruggable immunological disorders.” Source: RevenueBase Database · checked Sep 14, 2026
22	Qlsf Biotherapeutics, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	11-50	12 contacts →
	Indirect evidence “QLSF Biotherapeutics is an innovative immuno-oncology biotech startup in South San Francisco.” Source: RevenueBase Database · checked Sep 14, 2026
23	Iggenix, INC	Indirect evidence	South San Francisco, CA, United StatesHQ checked Sep 14, 2026	1-10	7 contacts →
	Indirect evidence “IgGenix is a clinical-stage, venture backed biotechnology company founded on breakthrough advances in Steve Quake’s laboratory at Stanford in collaboration with allergy clinician…” Source: RevenueBase Database · checked Sep 14, 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: biopharmaceutical 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 biopharmaceutical companies.
Partial evidence: Its own public description names part of biopharmaceutical companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name biopharmaceutical 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 45 biopharmaceutical companies based in South San Francisco, United States

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

As of Sep 14, 2026

46.9%Verified-email coverage

450.7Average contacts per company

11-50Median size (employees)

Sep 14, 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 45 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 biopharmaceutical 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 “biopharmaceutical 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 biopharmaceutical 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 biopharmaceutical 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, 9,509 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 14, 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.

Biopharmaceutical companies by metro in the United States

Frequently asked

How many biopharmaceutical companies are in the directory?

The directory contains 45 biopharmaceutical companies based in South San Francisco, United States.

Which city in the United States has the most biopharmaceutical companies?

San Diego leads the United States with 194 headquartered companies, followed by Boston (127) and Cambridge (122). South San Francisco has 45.

What contact data is available for biopharmaceutical companies?

The directory includes 20,281 business contacts and 9,509 email addresses for the listed biopharmaceutical companies.

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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.