| # | Company | Employees |
|---|---|---|
| 1 |
TUSTIN UNIFIED SCHOOL DISTRICTtustin.k12.ca.us
An education management company based in Tustin, California, overseeing school district operations and educational programs for students |
1,275 |
| 2 |
Young's Market Company
Premier distributor of fine wine, spirits, and select beverages in the western US, representing industry-leading brands with a focus on values and community |
1,201 |
| 3 |
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 |
| 4 |
Virgin Galacticvirgingalactic.com
Development of advanced air and space vehicles enabling private individuals and researchers to experience transformative human spaceflight adventures. |
972 |
| 5 |
Good Neighborsgoodneighbors.us
An international humanitarian and development organization dedicated to improving quality of life, eradicating starvation and preventable diseases, and promoting inclusivity and respect worldwide |
936 |
| 6 |
Liberty Dental Planlibertydentalplan.com
A managed dental care benefits administrator specializing in government-sponsored programs, providing cost-effective, quality dental services through a large network |
768 |
| 7 |
Waypointacxion.com
National sales and marketing agency specializing in representing top brands in the foodservice industry, bridging the gap between manufacturers and the marketplace |
738 |
| 8 |
PTS Advanceptsadvance.com
PTS Advance partners with candidates, clients, and partners in various industries to provide staffing, recruitment, and workforce management services, prioritizing career advancement and business growth |
705 |
| 9 |
WATG and Wimberly Interiorswatg.com
A top provider of integrated luxury hospitality design services, offering advisory, master planning, architecture, landscape design, and Wimberly Interiors |
656 |
| 10 |
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 |
| 11 |
Largo Concrete, Inc.largoconcrete.com
A leading structural concrete contractor with over 25 years of experience, specializing in high-rise residential, commercial, and institutional projects throughout California |
561 |
| 12 |
Trinity Broadcasting Network (TBN)tbn.org
A global faith and family broadcaster with over 30 networks and streaming platforms, reaching 175 nations with inspirational programming in 14 languages |
505 |
| 13 |
Jiffy Lube, M.C. LLCjiffylube.com
An award-winning franchisee of a leading automotive service brand, dedicated to providing exceptional customer experiences and driving industry innovation |
449 |
| 14 |
Seven Gables Real Estatesevengables.com
A forward-thinking brokerage focused on high standards, genuine relationships, and making an impact in real estate with an international reach and full-service support |
438 |
| 15 |
YMCA of Orange Countyymcaoc.org
This organization in Orange County and surrounding areas strengthens communities through youth development, healthy living, and social responsibility programs, ensuring accessibility for all |
431 |
| 16 |
Systems Technology Associates (STA)staweb.com
This company provides strategic consulting services, financial analytics tools, and solution warranties to help businesses bridge the gap between IT and operations |
389 |
| 17 |
Avid Bioservicesavidbio.com
Provides biologics contract development and manufacturing services, offering integrated capabilities from cell line development to commercial supply for biotech and pharma companies. |
369 |
| 18 |
Alexander's Mobility Servicesalexanders.net
Global transportation, workforce mobility, commercial relocation, and logistics services with a focus on quality and technology, operating strategically across the United States |
321 |
| 19 |
PTS Advance - Gulfptsadvance.com
Specializes in providing advanced solutions and services to help clients streamline processes, improve efficiency, and achieve business goals |
319 |
| 20 |
Halohalotechnology.com
A global leader in fiber optics, Halo shapes the future with compatible transceiver technology, offering innovative product solutions through its leading global brands |
307 |
| 21 |
VeSyncvesync.com
An international brand specializing in consumer products for home improvement, electronics, and outdoor equipment, focused on innovation and enhancing lifestyles globally |
281 |
| 22 |
MemorialCare Medical Groupmemorialcare.org
Physician-based organization offering comprehensive medical care with over 200 physicians in various specialties across Orange County and Long Beach |
278 |
| 23 |
SYSPRO Americassyspro.com
Global ERP software provider specializing in manufacturing and distribution industries, offering scalable solutions deployed in the cloud, on-premise, or both |
189 |
| 24 |
Briggs Electric, Inc.briggselectric.com
A family-owned electrical contractor with nearly 70 years of experience, committed to excellence, quality, value, and teamwork for successful project outcomes |
185 |
| 25 |
Yoklyyokly.gives
Yokly provides remote staff and virtual assistants to help businesses manage day-to-day tasks and operations, ensuring peace of mind |
180 |
| 26 |
Foothill Regional Medical Centerfoothillregionalmedicalcenter.com
A fully accredited acute care hospital, providing general acute care, intensive care, and pediatric sub-acute care with a focus on diversity and inclusion |
177 |
| 27 |
Taylor Designwearetaylor.com
A design firm specializing in architectural design, interior design, planning, and design strategy, with a focus on healthcare, science & technology, education, and senior living |
163 |
| 28 |
RAJ Swimrajswim.com
Leading swimwear manufacturer in the US, handling all aspects of product creation in-house, specializing in designer and private label swimwear and cover-ups |
157 |
| 29 |
mophiemophie.com
California-based designer and manufacturer of innovative mobile solutions, specializing in battery cases and accessories sold globally through various retailers and online platforms |
150 |
| 30 |
Burnham WGB Insurance Solutionsbaldwin.com
A dedicated team of risk consultants providing innovative, tailored commercial insurance solutions, loss control, claims consulting, and personal insurance services |
59 |
| 31 |
ADVANTECH-AURES USAadvantech-aures.com
An IT manufacturer providing hardware solutions for POS and KIOSK markets globally, with revenue of โฌ116 million in 2019 |
15 |
| 32 |
GIMZO TECHNOLOGYgimzotech.com
Gimzotech offers comprehensive business transformation services, focusing on strategic growth, results-driven solutions, and end-to-end support for clients' success |
5 |
| 33 |
New Dynasty Construction Co.newdynastyconstruction.com
A sustainable construction company focused on green building practices, experienced project management, open communication, and collaboration using web-based tools |
4 |
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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 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