| # | Company | Employees |
|---|---|---|
| 1 |
Workdayworkday.com
It provides enterprise cloud applications for finance and human resources, utilizing AI and machine learning to support organizations globally. |
24,201 |
| 2 |
Veeva Systemsveeva.com
Cloud-based software solutions for global life sciences industry, serving pharmaceutical companies and biotechs with innovation and customer success. |
10,036 |
| 3 |
Blackhawk Networkbit.ly
Provides prepaid products and technologies connecting brands and consumers, enhancing loyalty, reach, and revenue with secure global payment solutions. |
3,610 |
| 4 |
Tekion Corptekion.com
The company specializes in creating user-friendly business applications using cutting-edge technology to drive global businesses forward with seamless consumer experiences |
3,006 |
| 5 |
Simpson Strong-Tiestrongtie.com
Supplier of structural building products with engineering support, product testing, training, and commitment to exceptional customer service. |
2,774 |
| 6 |
The Permanente Medical Group, Inc.northerncalifornia.permanente.org
A California-based medical group located in Oakland, providing healthcare services through a network of physicians and medical professionals |
2,446 |
| 7 |
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 |
| 8 |
ICE Mortgage Technologyice.com
It focuses on advancing the mortgage industry, enhancing business growth, and facilitating connections to homeownership through comprehensive housing finance solutions. |
2,320 |
| 9 |
Boydboydcorp.com
The company specializes in designing and manufacturing advanced engineered materials and thermal management solutions for various industries, promoting innovation and empowerment |
1,858 |
| 10 |
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 |
| 11 |
NextHome, Inc.nexthome.com
Innovative real estate franchise focused on consumer branding, technology, and marketing Empowering brokers and agents to provide excellent service |
1,436 |
| 12 |
The Permanente Medical Group, Inc. Physician Recruitment Servicesnortherncalifornia.permanente.org
Physician-led medical group in Northern and Central California with over 9,500 physicians providing quality care, shaping the future of health care through innovation and inclusivity |
1,231 |
| 13 |
Leapforceleapforce.com
Leapforce At Home offers flexible, independent contractor roles conducting internet-based research and information evaluation for global companies Ideal for self-motivated individuals |
1,014 |
| 14 |
Stanford Health Care Tri-Valleystanfordhealthcare.org
A provider of non-profit healthcare services, including comprehensive care with skilled physicians, nurses, and state-of-the-art technology, serving the Tri-Valley and surrounding communities |
1,010 |
| 15 |
KinderCare Education Centerskc-education.com
A learning center in Pleasanton, California that provides early childhood education and childcare services |
983 |
| 16 |
Pleasanton Unified School Districtpleasantonusd.net
A destination public school district in Pleasanton, CA, offering nationally recognized elementary, middle, high, and alternative education schools with a mission to create engaged world citizens |
955 |
| 17 |
QASourceqasource.com
QASource provides high-quality QA outsourcing services using a hybrid onsite-offshore model tailored to minimize costs and improve deliverable quality |
867 |
| 18 |
Vagarovagaro.com
A platform for beauty, fitness, and wellness businesses, Vagaro streamlines operations, boosts bookings, and fosters growth for entrepreneurs in the industry |
728 |
| 19 |
Shaklee Distributorus.shaklee.com
A pioneering company committed to environmental sustainability for over 50 years, offering high-quality products in green cleaning and natural nutrition |
717 |
| 20 |
Telecom Technology Services, Inc.linkedin.com
Specializing in accelerating 5G network rollouts, this company automates and streamlines processes for vRAN, Open RAN, Fiber, and IoT deployment |
684 |
| 21 |
Haciendahacienda.org
Hacienda provides a prime living and working environment in the San Francisco Bay Area, offering access to top amenities and resources for success |
617 |
| 22 |
Degreeddegreed.com
Technology suite enabling organizations to accelerate workforce capabilities through lifelong learning, data-driven development, skill-building, and real-time insights, connecting users to a robust network of partners |
554 |
| 23 |
Sciens Building Solutionssciensusa.com
Provider of fire protection, security, communications, and electrical solutions for various industries, dedicated to ensuring safety, protection, and business continuity |
508 |
| 24 |
BayOne Solutionsbayone.com
A minority-owned Talent Solutions Partner in the Bay Area, specializing in providing on-demand experts, automating business processes, and training workforces in tech |
477 |
| 25 |
City of Pleasantoncityofpleasantonca.gov
The company is based in Pleasanton, a wealthy city known for its high quality of life, education, employment opportunities, and community amenities |
469 |
| 26 |
Ellie Maeicemortgagetechnology.com
A leading cloud-based loan origination platform provider for the mortgage industry, helping lenders originate more loans efficiently while ensuring compliance |
463 |
| 27 |
Cameo Global, Inc. (Acquired by New Era Technology in 2023)neweratech.com
A global IT company offering consulting, procurement, implementation, and support services, as well as a Cisco-powered cloud service for advanced communications |
430 |
| 28 |
ServiceMax, a PTC Technologyptc.com
Provider of cloud-based field service management software, optimizing operations for industries to manage assets, support growth, and run profitable businesses |
420 |
| 29 |
United Technounitedtechno.com
A California-based company providing innovative IT and Business solutions, specializing in industries like Life Sciences, Retail, and Technology, offering services like Salesforce and Cloud Integration |
409 |
| 30 |
Cowbellcowbell.insure
Provides tailored standalone cyber coverage for small and medium-sized enterprises using AI for continuous risk assessment and underwriting, offering comprehensive risk management services. |
377 |
| 31 |
Calyxo, Inc.calyxoinc.com
An innovation-driven medical device company focused on improving care for patients with kidney stones, led by experienced executives and investors |
361 |
| 32 |
Growing Stars Incgrowingstars.com
An affordable online tutoring service providing convenient and effective tutoring to students worldwide, with coverage in national newspapers and positive customer testimonials |
359 |
| 33 |
Oil Changersoilchangers.com
An industry-leading, independent fast oil and lube business with drive-through service, focused on customer convenience, community support, employee development, and sustainability |
351 |
| 34 |
Spotlessgetspotless.com
A dedicated flooring specialist with 16 years experience in providing top-notch commercial and residential carpet cleaning and floor care services |
347 |
| 35 |
Sunbelt Controlssunbeltcontrols.com
Leading building automation contractor providing full-service solutions for new construction and retrofit projects in the Western United States for over 30 years |
346 |
| 36 |
Tryfacta, Inc.tryfacta.com
Workforce and IT services provider with 26+ years of experience managing contingent workforce and IT programs, focusing on simplifying business complexities for clients |
313 |
| 37 |
VentureSoftventuresoft.ai
An $80 million enterprise offering systems integration, application outsourcing, and business process solutions for Internet applications, big data, and IoT |
313 |
| 38 |
Leapforce, Incleapforceathome.com
Managed information evaluation services provider specializing in search engine testing, information retrieval, and machine learning, acquired by Appen in 2017 |
313 |
| 39 |
ROCKIN'โ JUMProckinjump.com
Family-friendly trampoline park with open jumping, dodgeball, foam pit, and party rooms Offers entertainment for kids and adults, franchise opportunities available |
294 |
| 40 |
Vembu Technologiesvembu.com
Leading provider of affordable and secure backup solutions for virtual, physical, cloud, and SaaS environments, catering to small and medium businesses |
277 |
| 41 |
Specialty's Cafe & Bakeryspecialtys.com
The company provides high-quality, fresh, and simple meals to professionals, promoting a healthy and enjoyable workday experience with their lunch offerings |
266 |
| 42 |
Thoratec, now a part of St. Jude Medicalcardiovascular.abbott
A leading medical technology company focused on improving patient survival and quality of life through advanced mechanical circulatory support solutions |
252 |
| 43 |
Frontier Energy, Inc.frontierenergy.com
A professional services firm specializing in energy market transformation, program management, engineering, software, and customer engagement to promote intelligent energy use |
248 |
| 44 |
Avathonavathon.com
Software platform unifies real-time sensing, decision-making, and autonomous action for complex operations across asset-intensive environments, improving performance and resilience for various industries. |
247 |
| 45 |
Cornerstone Staffing Solutions, Inc.cornerstone-staffing.com
A staffing company that connects talent with jobs, committed to service excellence, diversity, and upholding industry best practices |
242 |
| 46 |
Gatan Inc.gatan.com
Manufactures instrumentation and software for electron microscopes, enhancing their operation. Products cover specimen preparation to imaging and analysis for various scientific applications. |
236 |
| 47 |
DAHLIN Architecture | Planning | Interiorsdahlingroup.com
A diverse firm of multicultural professionals in architecture, planning, and interiors, collaborating to craft sustainable communities and urban environments |
236 |
| 48 |
ABHOW (Operating as HumanGood)humangood.org
HumanGood is a nonprofit provider of senior housing focused on redefining aging well for adults 55 and older through community living |
225 |
| 49 |
ZINFI Technologies, Inc.zinfi.com
It offers a Unified Partner Management platform that automates partner management processes, enhancing productivity and driving revenue growth for technology providers. |
215 |
| 50 |
Altorosaltoroslabs.com
IT consulting and development group delivering cloud-native solutions to Global 2000 companies, enhancing efficiency and accelerating product delivery. |
201 |
| 51 |
Contrast Securitycontrastsecurity.com
A code security platform trusted by developers and security teams to swiftly secure code and protect against targeted application security attacks |
197 |
| 52 |
Carl Zeiss X-ray Microscopy Inc.xradia.com
This company designs and manufactures high-performance 3D X-ray microscopes for industrial and research applications, enabling nondestructive imaging with ultra-high resolution |
196 |
| 53 |
Smart ERP Solutionssmarterp.com
Innovative, cost-effective solutions for common business challenges, extending ERP capabilities, streamlining operations, and supporting business growth through seamless integration |
182 |
| 54 |
Leisure Sports Hospitalityclubsports.com
Leisure Sports Hospitality develops and operates upscale hotels, fitness resorts, and unique club/hotel concepts with world-class fitness facilities and consulting services |
180 |
| 55 |
Excel Realty and Mortgageteamerm.com
Full-service real estate and mortgage brokerage providing sales, lending, and marketing solutions for residential, commercial, and new development properties across the United States |
180 |
| 56 |
OpenVPN Inc.openvpn.net
The company offers secure, virtualized, reliable networking solutions ensuring safe communications between various applications, devices, and remote workforces for businesses of all sizes. |
175 |
| 57 |
Alif Semiconductoralifsemi.com
Industry-leading supplier of next-generation microcontrollers and fusion processors offering scalable performance, AI/ML acceleration, and multi-layered security for efficient, integrated functionality |
173 |
| 58 |
Miramiracare.com
This company offers a mobile health platform powered by Quanovate, providing accurate, personalized health tracking and analysis for better healthcare outcomes globally |
171 |
| 59 |
Enact Solarenact.solar
Enact's software platform revolutionizes solar and energy storage project design, deployment, and management globally, streamlining sales, project execution, and customer transitions |
170 |
| 60 |
Axis Community Healthaxishealth.org
A community-focused healthcare organization providing quality and affordable medical services, mental health counseling, addiction recovery programs, and nutrition services to low-income residents |
169 |
| 61 |
EdTheoryedtheory.com
Provides top-notch therapy and behavioral mental health services to children with special needs and autism, serving over 300 school districts nationwide |
168 |
| 62 |
ZEST Consulting(US); ZEST Technology (Canada);ZCLUS(India)Ltdzclus.com
A technology consulting company based in California, USA with offices in India and Canada, offering next-gen solutions through collaboration and innovation |
167 |
| 63 |
IronPlaneteu.ironplanet.com
Online marketplace for buying and selling used equipment and durable assets worldwide with exclusive equipment condition certification Visit website for more |
165 |
| 64 |
Noctrix Health, Inc.noctrixhealth.com
Innovative company developing therapeutic wearables for patients to manage chronic conditions as an alternative to pharmaceutical therapies, focusing on efficacy and cost-effectiveness |
163 |
| 65 |
PeopleSoft, Inc.oracle.com
Provider of HRMS, FMS, CRM, SCM, EPM software, and solutions for large corporations, governments, and organizations, acquired by Oracle in 2005 |
161 |
| 66 |
1st United Credit Union1stunitedcu.org
A local credit union in California's East Bay Area, providing fast, friendly banking services to residents, workers, and students in various counties |
158 |
| 67 |
Vivo Inc.vivoinc.com
IT Consulting and Staffing firm with a focus on delivering results, simplifying processes, and nurturing client and employee growth Recognized for fast growth and business success |
157 |
| 68 |
Workday VNDLYworkday.com
Streamline contingent labor management by integrating Workday VNDLY VMS with Workday HCM for a cohesive and efficient total workforce solution |
157 |
| 69 |
Engine Roomengine-room.com
Engine Room offers finance and accounting support to venture-backed life science and tech start-ups, from execution to strategic guidance, ensuring financial organization success |
157 |
| 70 | 155 | |
| 71 |
SafeAeon Inc.safeaeon.com
Offers 24x7 managed security services, including SOC, MDR, EDR, and incident response, using AI and human expertise to combat global cyber threats cost-effectively. |
155 |
| 72 |
Sabah Internationalsciensusa.com
Specializes in fire protection systems, including clean agent suppression, fire alarm, and life safety systems for various industries in California |
154 |
| 73 |
UroLift Systemurolift.com
The company develops minimally invasive devices for BPH treatment, aiming to improve patient quality of life and empower healthcare providers |
152 |
| 74 |
Golden Summit Wealth & Insurance Solutionsnortherncalifornia.massmutual.com
A holistic financial planning firm offering comprehensive services, maximum protection strategies, cash value insurance, and fee-based wealth management solutions for financial professionals and clients |
149 |
| 75 | 146 | |
| 76 |
Aroha Technologies, Incarohatechnologies.com
A technology-enabled business solutions provider offering ERP, SCM, CRM, e-commerce, project services, training, staffing, call center, and global sourcing solutions globally |
120 |
| 77 |
Packet Fusionpacketfusion.com
A technology-focused IT advisory firm offering strategic guidance, implementation, and management services to help businesses optimize efficiency and achieve business goals |
59 |
| 78 |
Bespin Global USbespinglobal.us
Cloud technology experts delivering customized solutions for businesses worldwide, guiding them in adopting, managing, and optimizing the cloud to drive success and innovation |
48 |
| 79 |
CANCOM UScancom.com
A digital transformation partner providing comprehensive IT solutions, consulting, implementation, and services for businesses worldwide with a focus on innovation and efficiency |
44 |
| 80 |
Impact Marketingimpactmarketingca.com
This marketing company specializes in outsourced sales, marketing, and corporate promotions for clients, focusing on growth through employee development and proven methods |
36 |
| 81 |
AMtec Industries, Inc.amtec1.com
This company provides engineering and manufacturing services for multiple industries including Semiconductor, Industrial, Transportation, Entertainment, and Bio-Pharma |
32 |
| 82 |
6D Global Technologies, Inc.6dglobal.com
Premier digital experience solutions provider creating remarkable experiences across marketing channels and devices to optimize performance and achieve success |
27 |
| 83 |
TechTu Business Solutions, Inctechtu.com
IT services and solutions provider with expertise in technology stack, project management, and application management for mid-size & Fortune 500 companies |
25 |
| 84 |
Mudrasysmudrasys.com
Global systems integrator and IT services provider delivering quality solutions through the right sourcing model, offering expertise in consulting, solution development, and delivery |
21 |
| 85 |
Expanse Medicalexpansemedical.com
Innovative development partner for medical device companies worldwide, dedicated to transforming big ideas into lifesaving products with cutting-edge technology |
17 |
| 86 |
LeapFishleapfish.com
Innovative search engine offering a unified, multimedia experience for searching and sharing traditional, social, and real-time content, making web navigation more integrated and efficient |
16 |
| 87 | 8 | |
| 88 |
Ingenuity Insightsingenuityinsights.com
A global technology firm specializing in innovative solutions for businesses, leveraging IoT & machine learning, with expertise in healthcare & financial sectors |
6 |
| 89 |
Digitalstatesdigitalstates.com
Digitalstates specializes in digital and AI transformation through cloud migration, application modernization, oracle migration, data analytics, and AI/ML professional services for Fortune 500 companies |
5 |
| 90 |
Aurum Venture Partnersaurumventurepartners.vc
Global Venture Capital Fund focused on creating unicorns in Smart Enterprise, Fintech, and Web 30 by investing in emerging technology projects worldwide |
5 |
| 91 |
InnoGen Energy, Inc.innogenenergy.com
An energy solutions company focused on bringing innovative and affordable power generation systems to consumer and commercial markets, improving global standards of living |
4 |
| 92 |
Sentient Mindssentientminds.com
A Digital Transformation company specializing in Intelligent Automation using AI technologies like RPA, NLP, Machine Learning, and Blockchain Services include RPA managed services and professional solutions |
4 |
| 93 |
Screolesafebrowse.io
A leading digital agency specializing in design, development, and marketing services to optimize customer relationships, enhance decision-making, and drive business growth |
3 |
| 94 |
Advantage Biomedical Servicesadvantagebiomed.com
Provider of tailored clinical and biomedical engineering solutions, refurbished medical equipment sales, and maintenance services in California, enhancing healthcare delivery and patient safety |
2 |
| 95 | 2 |
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.
The same list elsewhere in United States
- The largest companies in the United States 91,669
- The largest companies in California 12,813
- The largest companies in New York State 10,485
- The largest companies in Texas 8,086
- The largest companies in Florida 4,945
- The largest companies in Illinois 4,175
- The largest companies in Pennsylvania 3,110
- The largest companies in Massachusetts 3,093
- The largest companies in Georgia 2,632
- The largest companies in Ohio 2,618
- The largest companies in New Jersey 2,569
- The largest companies in Virginia 2,503
- The largest companies in Michigan 2,346
- The largest companies in North Carolina 2,174
- The largest companies in Alabama 1,806
- The largest companies in Washington State 1,785
- The largest companies in Colorado 1,774
- The largest companies in Minnesota 1,700
- The largest companies in Maryland 1,527
- The largest companies in Wisconsin 1,482
- The largest companies in New York 6,920
- The largest companies in San Francisco 2,030
- The largest companies in Houston 1,791
- The largest companies in Chicago 1,668