| # | Company | Employees |
|---|---|---|
| 1 | 40,813 | |
| 2 |
Agilent Technologiesagilent.com
Innovative company providing advanced analytical, research, and diagnostic solutions for various industries worldwide, including healthcare, environmental safety, and energy solutions |
25,000 |
| 3 | 18,287 | |
| 4 |
Gilead Sciencesgilead.com
A company focused on delivering innovative medicines in virology and oncology, addressing health inequities, and empowering people to live healthier lives |
14,891 |
| 5 |
Edwards Lifesciencesedwards.com
Develops breakthrough structural heart technologies and medical devices for patients, partnering with clinicians to improve lives globally across over 100 countries. |
14,148 |
| 6 |
Intuitiveintuitive.com
A global technology leader in minimally invasive care and robotic-assisted surgery, utilizing intelligent technology to enhance patient outcomes without constraints |
13,240 |
| 7 |
Beckman Coulter Diagnosticsbeckmancoulter.com
Develops and provides advanced diagnostic solutions for complex clinical testing in hospitals, reference laboratories, and physician offices to improve patient health. |
10,628 |
| 8 |
Illuminaillumina.com
The company develops innovative technologies and assays for genetic analysis, enabling personalized medicine and advancing disease research, drug development, and molecular testing |
9,673 |
| 9 |
Bio-Rad Laboratoriesbio-rad.com
Development and supply of innovative products for life science research and medical diagnostics, enhancing discovery and clinical results worldwide. |
9,416 |
| 10 |
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 |
9,180 |
| 11 |
ICU Medicalicumed.com
Specializes in safe, innovative IV therapy products, smart pumps, software, and consumables designed to improve patient care and safety. |
9,144 |
| 12 |
Dexcomdexcom.com
A leader in continuous glucose monitoring technology, empowering individuals with diabetes to control their health and pursue their dreams |
8,997 |
| 13 |
Variancancercare.siemens-healthineers.com
Development and delivery of advanced imaging, radiation therapy, software, and services supporting the entire cancer care journey globally. |
8,395 |
| 14 |
Cepheidcepheid.com
Healthcare company pioneering molecular diagnostics with automated systems and tests for a wide range of infections, diseases, and oncology, delivering actionable results Partnered with industry leader for expertise and solutions |
4,675 |
| 15 |
Guardant Healthguardanthealth.com
Develops advanced blood and tissue tests using AI and real-world data to improve cancer detection, monitoring, and treatment selection. |
4,663 |
| 16 |
Kite Pharmakitepharma.com
development and manufacturing of engineered T cell therapies targeting hematologic cancers, focusing on personalized, patient-specific cancer immunotherapy treatments. |
4,024 |
| 17 |
Applied Medicalappliedmedical.com
Designs, develops, manufactures, and distributes surgical devices for various medical specialties, focusing on enhanced clinical outcomes, cost containment, and choice. |
3,990 |
| 18 |
Masimomasimo.com
Develops and manufactures innovative noninvasive patient monitoring technologies and sensors to improve clinical decision-making and patient safety worldwide. |
3,667 |
| 19 |
BioMarin Pharmaceutical Inc.biomarin.com
A global biotechnology company focused on developing targeted therapies for rare genetic diseases, improving lives through genetic discovery and innovation |
3,198 |
| 20 |
Penumbra, Inc.penumbrainc.com
Designs, develops, manufactures, and markets novel medical devices addressing challenging conditions with significant unmet medical needs globally. |
3,159 |
| 21 |
CareFusionbd.com
Develops market-leading technologies and services for the health care industry; products improve cost and safety of patient care. |
2,600 |
| 22 |
Allergan Aesthetics, an AbbVie Companyglobal.allerganaesthetics.com
Develop, manufacture, and market a portfolio of leading aesthetics products including facial injectables, body contouring, plastics, and skin care. |
2,456 |
| 23 |
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 |
2,378 |
| 24 |
10x Genomics10xgenomics.com
This company provides tools for single cell analysis, spatial analysis, and in situ tools to advance research in various biological fields |
2,364 |
| 25 |
Scripps Researchscripps.edu
A leader in biomedical research, innovation, and education, working to improve human health and create hope for millions worldwide |
2,348 |
| 26 |
KARL STORZ North聽Americakarlstorz.com
Provides endoscopic technology and imaging solutions across various surgical specialties for human and veterinary medicine, with a focus on visionary design and precision. |
2,317 |
| 27 |
Envista Holdings Corporationenvistaco.com
Partners with dental professionals, providing industry-leading products, solutions, and technology for diagnosing, treating, preventing dental conditions, and improving smile aesthetics globally. |
2,210 |
| 28 |
Tandem Diabetes Caretandemdiabetes.com
A global diabetes technology company manufacturing and selling advanced automated insulin delivery systems to reduce the burden of diabetes management |
2,203 |
| 29 |
Smiths Medicalicumed.com
Development and manufacturing of medical products for infusion therapy, vascular access, vital care, respiratory, anesthesia, and patient monitoring applications. |
2,087 |
| 30 |
Antech Diagnosticsantechdiagnostics.com
A network of veterinary diagnostic laboratories providing a wide range of diagnostic services to veterinarians, animal hospitals, zoos, and government agencies in the US |
2,059 |
| 31 |
iRhythm Technologies, Inc.irhythm.com
A digital health company using wearable biosensors and data analytics to detect, predict, and prevent disease, with a focus on patient care and innovation |
1,874 |
| 32 |
MicroVention-Terumolinkedin.com
A rapidly growing medical device company in Southern California pioneering minimally invasive neuroendovascular technologies for therapeutic benefits in treating neurovascular disorders |
1,811 |
| 33 |
Roche Molecular Systemsroche.com
A California-based company part of Roche Diagnostics in Switzerland, specializing in developing and supplying innovative medical diagnostic products and services |
1,748 |
| 34 |
MiniMedminimed.com
Development and provision of comprehensive insulin delivery systems designed to reduce the daily challenges faced by people with diabetes. |
1,594 |
| 35 |
Exelixisexelixis.com
A diverse team dedicated to transforming science into new cancer treatments, driven by innovative drug discovery and commercialization efforts |
1,566 |
| 36 |
Ionis Pharmaceuticals, Inc.ionis.com
Leading pioneer developing RNA-targeted medicines and gene editing therapies to treat serious neurological and cardiovascular diseases through advanced disease biology research. |
1,546 |
| 37 |
Shockwave Medicalshockwavemedical.com
Development of intravascular lithotripsy catheters using sonic pressure waves to safely disrupt calcified plaque and restore artery blood flow. |
1,535 |
| 38 |
Advanced Sterilization Productsasp.com
Global leader providing advanced products, technologies, and workflows for medical sterilization and disinfection, dedicated to defending lives of patients and healthcare workers. |
1,532 |
| 39 |
Ultragenyxultragenyx.com
Development and commercialization of novel therapies targeting rare and ultrarare genetic diseases with high unmet medical needs. |
1,520 |
| 40 |
Terumo Neuroterumoneuro.com
Development and distribution of advanced neurovascular treatment products for cerebral aneurysms, stroke, carotid artery disease, and malformations worldwide. |
1,411 |
| 41 |
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 |
1,409 |
| 42 |
Twist Biosciencetwistbioscience.com
Company develops proprietary silicon-based manufacturing process for synthetic DNA, enabling cost-effective, rapid, precise, high-throughput DNA synthesis and sequencing for life science researchers across diverse fields. |
1,300 |
| 43 |
Revolution Medicinesrevmed.com
This company discovers and develops new drugs for cancer by leveraging natural products and evolutionary insights to target frontier oncology |
1,216 |
| 44 |
Eigeneigenhealth.my.canva.site
A company specializing in image-guided diagnosis and treatment for prostate cancer, with a focus on regulatory compliance and international distribution |
1,179 |
| 45 |
Advanced Bionicsadvancedbionics.com
Global leader providing cochlear implants, restoring hearing for individuals with severe-to-profound hearing loss. Manufacturer of advanced hearing devices. |
1,123 |
| 46 | 1,105 | |
| 47 |
Metagenicsmetagenics.com
Metagenics specializes in personalized nutrition and lifestyle medicine, offering research-based products and programs to help individuals achieve optimal health and wellness |
1,082 |
| 48 |
ATEC Spineatecspine.com
Designing medical devices for spine surgery, developing innovative technologies like Prone TransPsoas and EOS imaging for better patient care. |
1,062 |
| 49 |
Canon Medical Systems USA, Inc.us.medical.canon
Provides medical imaging solutions: CT, X-ray, MRI, ultrasound, service, Healthcare IT. Develops innovative solutions enhancing clinical performance and patient outcomes globally. |
1,040 |
| 50 |
Acadia Pharmaceuticalsacadia.com
Develop and commercialize FDA-approved treatments for neurological disorders, focusing on underserved diseases like Parkinson's psychosis and Rett syndrome. |
1,010 |
| 51 |
Ambry Geneticsambrygen.com
A leading clinical genomic diagnostic company with the largest genetic sequencing lab worldwide, offering precision medicine solutions and partnering with non-profit organizations |
977 |
| 52 |
BridgeBiobridgebio.com
This company is focused on finding, developing, and delivering breakthrough medicines for genetic diseases, bridging the gap between science and patient needs |
977 |
| 53 | 905 | |
| 54 |
PROCEPT BioRoboticsprocept-biorobotics.com
Develops surgical robotics, specifically AI-powered systems for urology, to advance patient care and treat lower urinary tract symptoms due to BPH. |
891 |
| 55 |
Becton Dickinson Company (Safety Syringes, Inc. )bd.com
A global medical technology company advancing health through improved medical discovery, diagnostics, and care delivery |
854 |
| 56 |
Heartflowheartflow.com
Advanced AI technology creating personalized 3D heart models from CT scans to improve diagnosis and treatment of coronary artery disease. |
841 |
| 57 |
Pacira BioSciences, Inc.pacira.com
Innovative provider of non-opioid pain management solutions, aiming to reduce opioid use, improve patient care, and enhance recovery outcomes |
841 |
| 58 |
CareDx, Inc.caredx.com
Innovative company specializing in non-invasive diagnostics for organ transplant patients, offering surveillance and pre-transplant solutions for kidney and heart transplants |
834 |
| 59 |
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 |
818 |
| 60 |
BillionToOnebilliontoone.com
A precision diagnostics company using a proprietary platform to accurately count DNA molecules for improved disease detection |
815 |
| 61 |
Arrowhead Pharmaceuticalsarrowheadpharma.com
A clinical stage company developing RNAi-based therapies to treat intractable diseases by silencing target genes, offering potentially life-changing treatments |
799 |
| 62 |
Corcept Therapeuticscorcept.com
Leading the research and development of cortisol modulation for treating serious diseases through innovative glucocorticoid receptor antagonists and groundbreaking treatments |
787 |
| 63 |
Cytokineticscytokinetics.com
A biopharmaceutical company focused on developing muscle activators and inhibitors for treating diseases affecting muscle performance, recognized for workplace excellence |
781 |
| 64 |
Kerr Dentalkerrdental.com
Provides premier dental solutions with a focus on exceptional customer experience, offering market-leading brands and a long history of innovation. |
754 |
| 65 | 744 | |
| 66 |
STAAR Surgicalstaar.com
Designs, develops, manufactures, and markets implantable lenses for eyes, offering visual freedom by reducing reliance on glasses or contact lenses, worldwide. |
734 |
| 67 |
Veracyte, Inc.veracyte.com
Developing genomic diagnostic tests to improve clinical outcomes by reducing inconclusive results and avoiding unnecessary surgeries for patients. |
716 |
| 68 |
Inari Medicalinarimedical.com
Treats venous and other diseases, offers innovative products and services in MedSurg, Neurotechnology, Orthopedics to improve patient and healthcare outcomes. |
688 |
| 69 |
Invitaeinvitae.com
providing accurate genetic information through advanced technology to support medical decisions and improve healthcare for individuals and families |
677 |
| 70 |
MP Biomedicalsmpbio.com
Manufacture and supply over 55,000 life science, fine chemical, and diagnostic products with global distribution and quality certifications. |
677 |
| 71 |
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 |
660 |
| 72 |
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 |
653 |
| 73 |
Arcus Biosciencesarcusbio.com
A rapidly growing biopharmaceutical company in San Francisco developing cancer treatments with a focus on combination therapies and stock options for employees |
644 |
| 74 |
Nektar Therapeuticsnektar.com
Development and commercialization of innovative therapies targeting autoimmune and inflammatory diseases through scientific research and strategic pharmaceutical partnerships. |
644 |
| 75 | 623 | |
| 76 |
Crinetics Pharmaceuticalscrinetics.com
A pharmaceutical company focused on pioneering new therapeutics for patients with endocrine system diseases to improve their daily lives |
619 |
| 77 | 599 | |
| 78 |
Pharmacyclics, an AbbVie Companypharmacyclics.com
A biopharmaceutical company focused on developing novel cancer therapies to improve patient outcomes and address unmet medical needs |
590 |
| 79 | 588 | |
| 80 |
The Lundquist Institutelundquist.org
Conducts groundbreaking medical research, collaborating with Harbor-UCLA Medical Center to translate discoveries into treatments benefiting individuals across various health conditions |
586 |
| 81 |
Dendreondendreon.com
A pioneer in immunotherapy, Dendreon develops innovative treatments for prostate cancer using a patient's own immune cells to fight the disease |
583 |
| 82 |
Toshiba America Medical Systemsmedical.toshiba.com
A leader in medical imaging technology, this company markets and services diagnostic imaging systems to provide patient-focused solutions for the healthcare market |
583 |
| 83 |
Denali Therapeuticsdenalitherapeutics.com
Company dedicated to defeating neurodegenerative diseases through innovative research, brain delivery engineering, biomarkers, and collaborative, impact-focused work environment |
582 |
| 84 |
Hygienahygiena.com
The company delivers rapid microbial detection solutions to various industries worldwide, with a focus on innovative, easy-to-use technologies and excellent customer service |
570 |
| 85 |
PSC Biotech庐 Corporationbiotech.com
PSC Biotech Corporation provides life science companies worldwide with consulting, software solutions, contract manufacturing, investment consulting, and metrology services |
568 |
| 86 |
Outset Medical, Inc.outsetmedical.com
Pioneering medical technology company simplifying dialysis with innovative Tablo Hemodialysis System for patients and providers, offering care anytime, anywhere |
568 |
| 87 |
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 |
566 |
| 88 |
Vaxcytevaxcyte.com
A vaccine innovation company developing high-fidelity vaccines to prevent bacterial diseases using advanced synthetic techniques and a broad-spectrum conjugate vaccine |
558 |
| 89 |
SI-BONEsi-bone.com
Specializing in sacroiliac joint treatment, the company offers a less invasive implant system for fusion surgery, with over 65,000 procedures done |
555 |
| 90 |
InModeinmodemd.com
Develops, manufactures, markets radio-frequency platforms for minimally-invasive procedures, improving existing surgical methods in plastic surgery, gynecology, dermatology, ENT, ophthalmology. |
539 |
| 91 |
Halozyme, Inc.halozyme.com
Develop enzyme technology enhancing drug delivery, reducing treatment times, partnering with pharma companies to improve patient outcomes globally. |
536 |
| 92 |
Ascential Medical & Life Sciences (now includes D&K Engineering)ascentialtech.com
A comprehensive medical and life sciences company accelerating innovation from ideation to manufacturing, with a focus on complex and essential projects |
528 |
| 93 |
SCITONsciton.com
An employee-owned medical device company specializing in cutting-edge laser and light technologies, providing advanced solutions for aesthetic and medical challenges worldwide. |
501 |
| 94 |
Standard BioToolsstandardbio.com
provides advanced proteomic and multi-omic technologies enabling researchers to uncover unique biological insights beyond conventional methods |
501 |
| 95 |
AMPAC Fine Chemicalsampacfinechemicals.com
United States-based custom manufacturer of active pharmaceutical ingredients and registered intermediates, solving problems through technology to deliver quality products for saving and improving lives. |
466 |
| 96 |
Meissnermeissner.com
Manufactures advanced microfiltration, single-use systems. Fluid technology, innovation for pharmaceutical, biopharmaceutical manufacturing processing and fluid handling solutions. |
459 |
| 97 |
Cytek Biosciencescytekbio.com
A leading manufacturer of flow cytometry products, offering affordable instruments and support services for researchers and clinicians worldwide |
448 |
| 98 |
Abzenaabzena.com
Leading bioconjugate, ADC, and complex biologics CDMO + CRO, supporting customers from discovery to commercial launch with integrated programs or individual services. |
443 |
| 99 |
Amphastar Pharmaceuticals, Inc.amphastar.com
A pharmaceutical company with cGMP-compliant facilities developing, manufacturing, and marketing biopharmaceutical products globally, focusing on high-quality production in the United States |
423 |
| 100 |
BIOLASEbiolase.com
Design, manufacture, market proprietary laser systems for minimally invasive cosmetic, restorative, and surgical dental procedures, delivering superior, patient-friendly results globally. |
402 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Oct 24, 2026.
More company lists in California
- The largest companies in California 12,813
- SaaS companies in California 1,617
- Software Development companies in California 1,386
- Venture capital and private equity firms in California 786
- IT Services and IT Consulting companies in California 730
- Venture Capital and Private Equity Principals companies in California 645
- AI companies in California 606
- AI-native companies in California 552
- Retail chains in California 527
- Hospitals and Health Care companies in California 519
- Financial Services companies in California 513
- Financial services firms in California 503
- Education providers in California 498
- IT services companies in California 428
- Manufacturers in California 417
- Technology, Information and Internet companies in California 413
- Higher Education companies in California 376
- Public sector organisations in California 337
- Hardware manufacturers in California 335
- Critical infrastructure operators in California 293
- Government Administration companies in California 279
- Healthcare providers in California 277
- Education Administration Programs companies in California 277
- Real Estate companies in California 275
The same list elsewhere in United States
- Pharmaceutical companies in the United States 831
- Pharmaceutical companies in Massachusetts 82
- Pharmaceutical companies in New Jersey 73
- Pharmaceutical companies in Pennsylvania 51
- Pharmaceutical companies in North Carolina 48
- Pharmaceutical companies in Texas 37
- Pharmaceutical companies in New York State 36
- Pharmaceutical companies in Florida 34
- Pharmaceutical companies in Illinois 29
- Pharmaceutical companies in Minnesota 25