Company lists · Data refreshed September 2026

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

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, with San Diego as the single most-represented city among the companies on the list. The directory was updated in September 2026.

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 6, 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 6, 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 6, 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202610001+17,217 contacts →

“About Genentech We're passionate about finding solutions for people facing the world's most difficult-to-treat conditions.”

Source: company website · checked Sep 6, 2026
2Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 2026201-500282 contacts →

“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: company website · checked Sep 6, 2026
3Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 2026501-1,000223 contacts →

“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: company website · checked Sep 6, 2026
4Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202651-200179 contacts →

“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: company website · checked Sep 6, 2026
5Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-50125 contacts →

“At Alumis, our goal is to significantly improve the lives of patients by replacing broad immunosuppression with targeted therapies.”

Source: company website · checked Sep 6, 2026
6Strong evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202651-200123 contacts →

“RAPT is a clinical-stage immunology-based biopharmaceutical company focused on discovering, developing and commercializing novel therapies for patients living with inflammatory…”

Source: company website · checked Sep 6, 2026
7Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202651-200119 contacts →

“Septerna is on a mission to make the promise of future GPCR medicines a reality for patients.”

Source: company website · checked Sep 6, 2026
8Strong evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-50116 contacts →

“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: company website · checked Sep 6, 2026
9Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202651-200100 contacts →

“CytomX Therapeutics, Inc.”

Source: company website · checked Sep 6, 2026
10Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-50100 contacts →

“California Life Sciences (CLS) is the state’s most impactful life sciences membership organization, advocating for the sector and its diverse innovation pipeline.”

Source: company website · checked Sep 6, 2026
11Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5075 contacts →

“Circle Pharma initiated operations in June 2014 with seed funding from Pfizer, Inc.”

Source: company website · checked Sep 6, 2026
12Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5045 contacts →

“Star Therapeutics is a biotechnology company focused on the discovery and development of life-changing therapies for diseases with significant unmet need.”

Source: company website · checked Sep 6, 2026
13Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5043 contacts →

“Our mission is to cure age-related disease by moving successful therapeutics toward clinical trials within months, not years.#CreatingTime”

Source: company website · checked Sep 6, 2026
14Strong evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202651-20036 contacts →

“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: company website · checked Sep 6, 2026
15Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5031 contacts →

“Lyterian Therapeutics derives its name from the Greek word λυτήριος or lutḗrios, that defines the termination, healing, or end of disease.”

Source: company website · checked Sep 6, 2026
16Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5025 contacts →

“Moonwalk Biosciences is pioneering novel therapeutics in adipose biology and tissue, driven by deep genetic and epigenetic evidence and insights.”

Source: company website · checked Sep 6, 2026
17Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 20261-1018 contacts →

“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: company website · checked Sep 6, 2026
18Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5017 contacts →

“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: company website · checked Sep 6, 2026
19Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 20261-1016 contacts →

“LiVeritas Biosciences enables biopharma companies to fast track drug research & development (R&D) process through mass spectrometry (MS) and digital transformation.”

Source: company website · checked Sep 6, 2026
20Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5015 contacts →

“Initial Therapeutics is discovering and developing a new class of small-molecule medicines designed to halt pathogenic protein formation in the earliest stages.”

Source: company website · checked Sep 6, 2026
21Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5013 contacts →

“Pragma Bio exists to find cures for undruggable immunological disorders.”

Source: company website · checked Sep 6, 2026
22Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 202611-5012 contacts →

“QLSF Biotherapeutics is an innovative immuno-oncology biotech startup in South San Francisco.”

Source: company website · checked Sep 6, 2026
23Indirect evidenceSouth San Francisco, CA, United StatesHQ checked Sep 6, 20261-107 contacts →

“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: company website · checked Sep 6, 2026

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 6, 2026
46.9%Verified-email coverage
450.7Average contacts per company
11-50Median size (employees)
433.3%Largest-city concentration · San Diego
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
10
11-50
18
51-200
12
201-500
1
501-1,000
2
10001+
1

Email recency for this list is measured across the whole United States list rather than this city, 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 6, 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

How many biopharmaceutical companies are in the directory?

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

Where are most of the biopharmaceutical companies located?

San Diego is the single most-represented city among the biopharmaceutical companies on the list.

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.