| # | Company | Employees |
|---|---|---|
| 1 |
TEKsystemsteksystems.com
Global solutions provider specializing in accelerating business transformation through resolving technology, business, and talent challenges for Fortune 500 organizations |
28,131 |
| 2 |
Aerotekaerotek.com
Aerotek provides staffing and services solutions for various industries, helping companies and careers evolve to overcome challenges in North American industry |
20,490 |
| 3 | 10,652 | |
| 4 |
Actalentactalentservices.com
Actalent specializes in providing scalable talent solutions and services globally, focusing on engineering, sciences, and professional development to drive value for clients |
6,572 |
| 5 |
Dartmouth Collegehome.dartmouth.edu
Educates promising students, prepares for lifelong learning and responsible leadership, supported by dedicated faculty focused on teaching and knowledge creation. |
6,538 |
| 6 |
Allegis Groupallegisgroup.com
Providing comprehensive talent solutions worldwide through specialized companies, connecting people with opportunities and solving workforce challenges for business success. |
3,570 |
| 7 |
Allegis Global Solutionsallegisglobalsolutions.com
Global workforce solutions provider specializing in workforce design, management, consulting, and procurement to transform organizations and enhance competitive advantage. |
3,021 |
| 8 |
Aston Carterastoncarter.com
Providing specialized talent solutions in accounting, finance, HR, procurement, and supply chain to global clients including Fortune 500 companies. |
2,699 |
| 9 |
DTLR, Inc.dtlr.com
Leading lifestyle retailer operating over 250 stores across 19 states providing premium streetwear apparel and footwear brands for young trendsetting multicultural audiences. |
2,145 |
| 10 |
Utz Brands, Inc.utzsnacks.com
A leading manufacturer of salty snacks with a diverse portfolio of popular brands, distributed nationally and internationally through various channels |
1,981 |
| 11 |
TEKsystems Global Services in Indiateksystems.com
Accelerating business transformation through expertise in technology, business, and talent challenges for a global clientele of Fortune 500 companies |
1,523 |
| 12 |
Johns Hopkins Health Plansjobs.hopkinsmedicine.org
Provider of health insurance services for three health care plans, managing claims, customer service, network development, outcomes research, and disease/care management for over 400,000 members |
1,344 |
| 13 |
Live! Casino & Hotel Marylandlivech.com
A large commercial casino & hotel offering a variety of gaming options, luxury accommodations, dining choices, event venues, and entertainment experiences |
1,334 |
| 14 |
Hypertherm Associateshyperthermassociates.com
A US manufacturer of industrial cutting products and software, delivering solutions that shape the future for businesses worldwide |
1,316 |
| 15 |
Maryland Department of Transportationmdot.maryland.gov
A customer-driven provider of safe, sustainable, intelligent transportation solutions connecting customers to life's opportunities |
1,019 |
| 16 |
Geisel School of Medicine at Dartmouthgeiselmed.dartmouth.edu
Medical school focused on innovative research, training healthcare professionals, and improving community health through education and scientific advancement. |
965 |
| 17 |
Jack Conway & Co., Inc.jackconway.com
A Massachusetts-based real estate company provides quality services across multiple locations, emphasizing family-like relationships, excellence, and global outreach |
853 |
| 18 |
Hanover Countyhanovercounty.gov
Hanover County is a vibrant rural and suburban locality in Virginia, part of the greater Richmond metropolitan area with a population of approximately 97,500 |
708 |
| 19 |
Dragos, Inc.dragos.com
Provides most effective OT cybersecurity technology for industrial and critical infrastructure, safeguarding civilization with platform visibility, monitoring, and threat detection. |
665 |
| 20 |
EASi
Actalent connects individuals who dedicate their time and skills to creating a positive impact on the world Visit their website for more |
631 |
| 21 |
The Tuck School of Business at Dartmouthtuck.dartmouth.edu
A prestigious business school in Hanover and worldwide, fostering a collaborative community to create, teach, and apply innovative knowledge for successful leadership in business |
631 |
| 22 |
Hanover Collegehanover.edu
A nationally ranked liberal arts institution offering experiential, interdisciplinary majors with a focus on academic challenge, research, and civic engagement |
593 |
| 23 |
International Union of Painters and Allied Tradesiupat.org
A union advocating for workers in the painting and allied trades industries since 1887, providing support and representing their interests |
563 |
| 24 |
Major, Lindsey & Africamlaglobal.com
A leading legal search firm providing specialized recruiting and advisory services for law firms and legal departments globally, prioritizing diversity and confidentiality |
517 |
| 25 |
Thayer School of Engineering at Dartmouthengineering.dartmouth.edu
Company offers engineering education without departmental divisions, promoting human-centered innovation Programs include MEM, MEng, MS, PhD, dual degrees, and innovative undergraduate and graduate degrees |
466 |
| 26 |
BFPE Internationalbfpe.com
A woman-owned Total Fire Protection Company providing sales, installation, service, inspection, and training on various fire protection systems to businesses across multiple states |
410 |
| 27 |
Phillips Corporationphillipscorp.com
A global manufacturing solutions leader specializing in overcoming manufacturing challenges, enhancing capabilities, and driving profitability through partnerships with industry-leading technology providers |
406 |
| 28 |
Hanover Foods Corporationhanoverfoods.com
A leading food processor in the eastern US, producing a wide range of food products for retail, food service, and industrial markets since 1924 |
339 |
| 29 |
Hanover Hospital (Hanover, PA)hanoverhospital.org
A community hospital founded in 1926, focused on providing high-quality healthcare services to the Hanover area, now part of UPMC Pinnacle |
330 |
| 30 |
Grassroot Soccergrassrootsoccer.org
An adolescent health organization that uses soccer to educate and mentor young people in over 60 countries, reaching 18 million adolescents since 2002 |
312 |
| 31 |
BTEbtetechnologies.com
Specializing in human physical performance evaluation and treatment, we offer advanced physical therapy systems for clinics and hospitals to achieve better outcomes |
295 |
| 32 |
One Call Concepts, Inc.occinc.com
The company provides outsourced management for one call notification centers, pioneering new technologies and processes for effective utility damage prevention |
291 |
| 33 |
KeyW Corporationjacobs.com
Innovative national security solutions provider for the Intelligence, Cyber, and Counterterrorism communities, specializing in advanced technologies and cybersecurity solutions |
272 |
| 34 | 246 | |
| 35 |
TrueNorth Wellness Servicestruenorthwellness.org
Providing personalized behavioral health and wellness services, including counseling, crisis support, residential services, and education, to empower individuals in achieving their wellness goals |
181 |
| 36 |
Dartmouth Investment and Philanthropy Programdippnh.org
Student-run organization managing a $700,000+ equity portfolio, distributing capital gains to philanthropic endeavors, offering hands-on investing experience and educational opportunities |
178 |
| 37 |
Vibrintvibrint.com
Vibrint enhances national security intelligence gathering through innovative technology, high-performance computing, and mission resilience, optimizing data analysis for critical decisions |
176 |
| 38 |
Adfinitas Healthadfinitashealth.com
A healthcare management company providing integrated medical services in hospitals and post-acute care centers, focused on improving patient outcomes and client satisfaction |
175 |
| 39 |
Alliance Technology Groupalliance-it.com
A North American Systems Integrator & IT Solutions company specializing in infrastructure, security, and cloud solutions for public and private sectors since 1997 |
170 |
| 40 |
Hanover Schoolshanoverschools.org
A k-12 public school in Hanover, Massachusetts, focused on guiding students to thrive in a global society |
166 |
| 41 |
AquaPhoenix Scientificaquaphoenixsci.com
Custom manufacturing and distribution of water quality testing products, chemical feed equipment, and software for industrial treatment programs. |
152 |
| 42 |
McCLARIN Compositesmcclarincomposites.com
A leading supplier of large Thermoplastic and Fiberglass Reinforced Plastic components, offering manufacturing services with quality focus and certifications in plastic standards |
133 |
| 43 |
Ledyard Wealth Managementledyardfinancialadvisors.com
A premier locally owned asset management firm offering integrated investment, tax, banking, and wealth management services with a client-centric approach Helping clients plan and live well |
56 |
| 44 |
White Mountains Capitalwhitemountains.com
A diversified insurance and financial services holding company focused on driving value creation with a reputation for being a good partner |
52 |
| 45 |
Latitude Inclatitudeinc.net
A human resource consulting firm providing contract, contract-to-hire, and direct placement services for skilled professionals in various industries nationwide |
49 |
| 46 |
RR Associatesrrassociatesusa.com
Management consulting firm offering services in strategic planning, branding, marketing, communications, operations, and finance with experienced partners in various industries |
19 |
| 47 |
Processa Pharmaceuticalsprocessapharmaceuticals.com
A pharmaceutical company founded in 2017, focused on developing products to enhance the survival and quality of life for patients with unmet medical needs |
17 |
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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