| # | Company | Employees |
|---|---|---|
| 1 | 57,548 | |
| 2 | 19,892 | |
| 3 |
LPL Financiallpl.com
Wealth management firm supporting financial advisors and institutions through investment solutions, fintech tools, practice management services, and custody of trillions in brokerage assets. |
14,788 |
| 4 |
Teradatateradata.com
The company specializes in providing a cloud analytics and data platform that empowers organizations with harmonized data and trusted AI/ML for confident decision-making and impactful results |
9,882 |
| 5 |
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 |
| 6 |
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 |
| 7 |
Dexcomdexcom.com
A leader in continuous glucose monitoring technology, empowering individuals with diabetes to control their health and pursue their dreams |
8,997 |
| 8 |
PriceSmartpricesmart.com
A membership-based retail company offering high-quality items at low prices across Central America, Colombia and the Caribbean, while supporting local communities through philanthropic initiatives |
6,108 |
| 9 |
Encore Capital Groupencorecapital.com
Publicly traded company promoting employee wellness, professional growth, and consumer rights, recognized for leadership and healthy workplace initiatives. |
3,243 |
| 10 |
Kratos Defense and Security Solutionskratosdefense.com
National security technologies spanning unmanned systems, hypersonics, satellite communications, cyber defense, and propulsion systems for rapid deployment to support various military domain missions. |
2,950 |
| 11 |
Semprasempra.com
A leading energy infrastructure company helping to electrify and decarbonize major markets in North America through sustainable practices and operational excellence |
2,572 |
| 12 |
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 |
| 13 |
Cohu, Inc.cohu.com
A global supplier of semiconductor test equipment, handlers, MEMS modules, thermal systems, and automated test equipment, focusing on yield improvement and cost reduction for manufacturers |
2,084 |
| 14 |
Axos Bankaxosbank.com
This company empowers consumers and businesses in managing their financial lives through banking, borrowing, investing, and planning with an exceptional team |
1,430 |
| 15 |
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 |
| 16 |
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 |
| 17 |
WD-40 Companywd40company.com
Global company marketing and distributing high-quality maintenance and homecare products across diverse trade channels in over 176 countries worldwide. |
955 |
| 18 |
Becton Dickinson Company (Safety Syringes, Inc. )bd.com
A global medical technology company advancing health through improved medical discovery, diagnostics, and care delivery |
854 |
| 19 |
Mitek Systemsmiteksystems.com
A global leader in digital access, using advanced identity verification technologies to make digital access faster, more secure, and compliant |
763 |
| 20 |
Realty Income Corporationrealtyincome.com
A real estate investment trust focusing on long-term net lease agreements with commercial clients, providing dependable monthly dividends and supporting racial justice |
704 |
| 21 |
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 |
| 22 |
Halozyme, Inc.halozyme.com
Develop enzyme technology enhancing drug delivery, reducing treatment times, partnering with pharma companies to improve patient outcomes globally. |
536 |
| 23 |
Travere Therapeuticstravere.com
Specializing in rare disease therapies, we aim to identify, develop, and provide life-changing treatments for those affected #InRareForLife |
507 |
| 24 |
Quidelquidelortho.com
QuidelOrtho develops intelligent diagnostic solutions to transform data into actionable insights, enabling faster responses and a healthier future globally |
496 |
| 25 |
Inseego Corpinseego.com
Industry pioneer in smart device-to-cloud solutions, extending 5G network edge for broader coverage, high-speed data, low latency, and secure internet access worldwide |
413 |
| 26 |
Pitney Bowes Inc.pitneybowes.com
A computer software based in California, specializing in presort services and located in San Diego |
321 |
| 27 | 317 | |
| 28 |
Kura Oncology, Inc.kuraoncology.com
A clinical-stage biopharmaceutical company developing small-molecule drug candidates targeting signaling pathways to improve outcomes for cancer patients |
315 |
| 29 | 308 | |
| 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. |
225 |
| 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 |
199 |
| 32 |
Broadridge Advisor Solutionsadvisor.broadridge.com
Provider of marketing and reporting tools for financial professionals to enhance client communication, attract prospects, and increase sales Trusted industry brands under one umbrella |
134 |
| 33 |
Beam Globalbeamforall.com
Clean technology innovator specializing in sustainable infrastructure products, EV charging solutions, energy storage, and energy security to power transportation and protect the environment |
97 |
| 34 |
Slacker Radio, Inc.slacker.com
A music streaming service offering free and subscription-based access to millions of songs, expert-programmed stations, news, sports, and talk on various platforms |
53 |
| 35 |
ID Analyticsrisk.lexisnexis.com
Consumer risk management leader providing innovative analytics, insights into consumer behavior, and advanced solutions for identity risk and creditworthiness to prevent fraud and enhance decisions |
42 |
| 36 |
Nuvve Holding Corp.nuvve.com
Leading planet electrification through intelligent energy platform, combining vehicle-to-grid technology and electrification partners to manage power among EV batteries and grid. |
39 |
| 37 | 27 | |
| 38 |
Jurman Medical Associationjurmanmedical,com
This company focuses on advancing healthcare solutions and technologies to improve patient outcomes and revolutionize the future of healthcare |
4 |
| 39 |
Globe Computers USglobecomputers.tk
A software development company focused on creating solutions to life's challenges, prioritizing customer satisfaction above all else |
2 |
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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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- Energy companies in San Diego 27
- Real Estate companies in San Diego 27
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The same list elsewhere in United States
- Publicly traded companies in the United States 3,096
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