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Pharmaceutical companies headquartered in San Diego

Tamtam tracks 42 pharmaceutical companies headquartered in San Diego. This list ranks all of them by number of employees on LinkedIn, led by Illumina, Resmed and Dexcom. Their median headcount is 443. Half of them were founded in 2006 or later.

馃嚭馃嚫 San Diego42 companiesUpdated Nov 2, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Illuminaillumina.com

The company develops innovative technologies and assays for genetic analysis, enabling personalized medicine and advancing disease research, drug development, and molecular testing

Biotechnology Research 馃嚭馃嚫 San Diego 9,673 1998
2
Resmedresmed.com.br

The company pioneers innovative medical devices and software platforms to treat chronic diseases, improve quality of life, and reduce healthcare costs globally

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 9,180 1989
3
Dexcomdexcom.com

A leader in continuous glucose monitoring technology, empowering individuals with diabetes to control their health and pursue their dreams

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 8,997 1999
4
CareFusionbd.com

Develops market-leading technologies and services for the health care industry; products improve cost and safety of patient care.

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 2,600 2009
5
Neurocrine Biosciencesneurocrine.com

A neuroscience-focused biopharmaceutical company dedicated to discovering treatments for neurological, neuroendocrine, and neuropsychiatric disorders, providing hope for patients with limited options

Biotechnology Research 馃嚭馃嚫 San Diego 2,378 1992
6
Tandem Diabetes Caretandemdiabetes.com

A global diabetes technology company manufacturing and selling advanced automated insulin delivery systems to reduce the burden of diabetes management

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 2,203 n/a
7
NuVasiveglobusmedical.com

A company focused on providing innovative musculoskeletal procedural solutions and enabling technologies to improve patient care worldwide Visit their website for more information

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 1,409 1997
8
Acadia Pharmaceuticalsacadia.com

Develop and commercialize FDA-approved treatments for neurological disorders, focusing on underserved diseases like Parkinson's psychosis and Rett syndrome.

Pharmaceutical Manufacturing 馃嚭馃嚫 San Diego 1,010 1993
9
Becton Dickinson Company (Safety Syringes, Inc. )bd.com

A global medical technology company advancing health through improved medical discovery, diagnostics, and care delivery

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 854 n/a
10
Eurofins | EAG Laboratorieseag.com

A scientific services company specializing in advanced materials and integrated circuitry analysis, offering problem-solving expertise to accelerate innovation and ensure quality and compliance

Research Services 馃嚭馃嚫 San Diego 818 1978
11
BioLegendbiolegend.com

Developing cutting-edge antibodies, proteins, and bioassays for biomedical research, offering superior products, customer service, and support Revolutionizing healthcare solutions and technologies globally

Biotechnology Research 馃嚭馃嚫 San Diego 660 n/a
12
ImmunityBio, Inc.immunitybio.com

Developing innovative cell and immunotherapy products to strengthen the immune system, target cancer and infectious diseases, and create immunological memory for long-term defense

Biotechnology Research 馃嚭馃嚫 San Diego 653 2014
13
Crinetics Pharmaceuticalscrinetics.com

A pharmaceutical company focused on pioneering new therapeutics for patients with endocrine system diseases to improve their daily lives

Pharmaceutical Manufacturing 馃嚭馃嚫 San Diego 619 2008
14
Crown Biosciencecrownbio.com

A global CRO specializing in oncology research, offering preclinical platforms, tumor organoid services, PDX models, biomarker analysis, and genomics services to optimize drug development

Biotechnology Research 馃嚭馃嚫 San Diego 566 2006
15
Halozyme, Inc.halozyme.com

Develop enzyme technology enhancing drug delivery, reducing treatment times, partnering with pharma companies to improve patient outcomes globally.

Biotechnology Research 馃嚭馃嚫 San Diego 536 n/a
16
Travere Therapeuticstravere.com

Specializing in rare disease therapies, we aim to identify, develop, and provide life-changing treatments for those affected #InRareForLife

Biotechnology Research 馃嚭馃嚫 San Diego 507 2020
17
Quidelquidelortho.com

QuidelOrtho develops intelligent diagnostic solutions to transform data into actionable insights, enabling faster responses and a healthier future globally

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 496 n/a
18
GNFgnf.org

A cutting-edge research institute focusing on biomedical problems using technologies such as genomics, proteomics, and high throughput screening in various disease areas

Biotechnology Research 馃嚭馃嚫 San Diego 494 1999
19
Avidity Biosciences, Inc.aviditybiosciences.com

The company utilizes a proprietary platform to develop RNA therapeutics that target genetic drivers of diseases, aiming to revolutionize therapy delivery

Biotechnology Research 馃嚭馃嚫 San Diego 447 2013
20
Element Bioscienceselementbiosciences.com

A life science company developing disruptive DNA sequencing and multiomics technology to empower researchers with affordable, high-quality data

Biotechnology Research 馃嚭馃嚫 San Diego 445 2017
21
Abzenaabzena.com

Leading bioconjugate, ADC, and complex biologics CDMO + CRO, supporting customers from discovery to commercial launch with integrated programs or individual services.

Pharmaceutical Manufacturing 馃嚭馃嚫 San Diego 443 2001
22
Volcano Corporationvolcanocorp.com

Global leader in intravascular imaging and therapy for coronary and peripheral applications, offering innovative technologies to improve patient outcomes worldwide

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 334 2000
23
Prometheus Laboratories Inc.prometheuslabs.com

Prometheus Laboratories Inc develops and markets diagnostic tests for gastroenterology, enabling precision healthcare solutions and future growth through innovation

Biotechnology Research 馃嚭馃嚫 San Diego 324 n/a
24
Kura Oncology, Inc.kuraoncology.com

A clinical-stage biopharmaceutical company developing small-molecule drug candidates targeting signaling pathways to improve outcomes for cancer patients

Biotechnology Research 馃嚭馃嚫 San Diego 315 2014
25
Vicalvical.com

Biopharmaceutical company based in San Diego developing innovative therapies for infectious diseases using patented DNA delivery technologies Partnering with industry leaders Website: wwwvicalcom

Biotechnology Research 馃嚭馃嚫 San Diego 308 1987
26
TriLink BioTechnologies, part of Maravai LifeSciencestrilinkbiotech.com

Global leader, nucleic acid and mRNA solutions, delivering chemical and biological expertise, CDMO services, high-quality materials including patented CleanCap mRNA capping technology for pharmaceutical and biotech.

Biotechnology Research 馃嚭馃嚫 San Diego 250 1996
27
Inova Diagnostics, A Werfen Companyinovadx.com

A leader in autoimmune technologies, Inova Diagnostics develops and manufactures IVD systems and reagents for diagnosis and monitoring of complex disorders worldwide

Biotechnology Research 馃嚭馃嚫 San Diego 249 1987
28
Calibre Scientific Groupcalibrescientific.com

Global provider of life science products & services for lab research, diagnostics, & biopharmaceuticals through acquisitions & organic growth, serving customers in 175+ countries

Biotechnology Research 馃嚭馃嚫 San Diego 248 2016
29
Invetechinvetechgroup.com

Global engineering and manufacturing partner for cell and gene therapy, diagnostics, IVD, and medtech companies. Designs, develops, automates, and manufactures products.

Engineering Services 馃嚭馃嚫 San Diego 246 1987
30
Fate Therapeutics Inc.fatetherapeutics.com

Developing off-the-shelf, iPSC-derived cell products for cancer and autoimmune diseases, including T-cell and natural killer cell immunotherapies with synthetic controls.

Biotechnology Research 馃嚭馃嚫 San Diego 225 2007
31
ARS Pharmaceuticals, Inc.ars-pharma.com

Developing intranasal epinephrine spray with innovative absorption technology for easy, reliable use in severe allergic reactions to food, medications, and insect bites

Pharmaceutical Manufacturing 馃嚭馃嚫 San Diego 199 n/a
32
Maravai LifeSciencesmaravai.com

Develops and provides nucleic acid products, enzyme development, and biologics safety testing for life sciences companies, supporting research, clinical trials, and commercialization.

Biotechnology Research 馃嚭馃嚫 San Diego 87 2014
33
Bora Biologicsborabiologics.com

Contract Development and Manufacturing Organization specializing in commercial-stage biologics manufacturing and GMP drug substance production, supporting biopharma innovators with manufacturing from late-stage development through commercial supply.

Pharmaceutical Manufacturing 馃嚭馃嚫 San Diego 81 2011
34
Poseida Therapeutics, Inc.poseida.com

Clinical-stage biopharmaceutical company advancing allogeneic cell therapies and genetic medicines with capacity to cure, utilizing proprietary genetic editing platforms and manufacturing.

Biotechnology Research 馃嚭馃嚫 San Diego 81 2014
35
Empiricoempiri.co

A venture-backed therapeutics company using biological data, human genetics, and programmable biology for target discovery and development, headquartered in San Diego with labs in Madison

Biotechnology Research 馃嚭馃嚫 San Diego 79 n/a
36
Althea, CMOaltheacmo.com

Contract development and manufacturing organization for process development, drug substance, and drug product manufacturing, including formulation and aseptic fill finish.

Biotechnology Research 馃嚭馃嚫 San Diego 72 1998
37
Nikkiso America, Inc.nikkisoamerica.com

The company provides innovative technologies and products globally, focusing on aerospace, industrial, medical, and precision equipment divisions to meet customer demands

Industrial Machinery Manufacturing 馃嚭馃嚫 San Diego 65 2006
38
iBio, Inc.ibioinc.com

iBio utilizes artificial intelligence in drug discovery to develop safer and more effective immunotherapies for challenging cancers, targeting hard-to-drug candidates

Biotechnology Research 馃嚭馃嚫 San Diego 58 2008
39
Escient Pharmaceuticalsescientpharma.com

A clinical-stage pharmaceutical company in San Diego developing novel therapeutics for neurosensory-inflammatory diseases, with a focus on GPCR drug discovery

Biotechnology Research 馃嚭馃嚫 San Diego 49 2018
40
OZ Biosciencesozbiosciences.com

Product development company specializing in advanced delivery systems for bioactive materials such as DNA, siRNA, proteins, and antibodies to accelerate scientific discoveries

Biotechnology Research 馃嚭馃嚫 San Diego 22 2003
41
Ascentx Medicalascentxmedical.com

Innovative medical device company creating new treatments for gastrointestinal, urological, and other medical applications to improve patient care

Medical Equipment Manufacturing 馃嚭馃嚫 San Diego 3 2009
42
SD Biosciencesdbioscience.com

A protein production services lab that specializes in recombinant protein expression, purification, and characterization through contract services

Biotechnology Research 馃嚭馃嚫 San Diego 2 2005

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 2, 2026.

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