| # | Company | Employees |
|---|---|---|
| 1 |
DuPontdupont.com
A global company focused on creating essential innovations, uncovering insights, and inventing a better now for a brighter future |
22,104 |
| 2 |
Solenissolenis.com
A global specialty chemicals producer offering sustainable solutions for water-intensive industries with a wide range of products and technologies for improving operational efficiency and environmental impact |
21,407 |
| 3 |
Privatprivat.com
Financial technology company providing convenient access to US accounts, offering credit and debit card services with a customer-centric approach, focusing on security and privacy |
16,263 |
| 4 |
University of Delawareudel.edu
State-assisted university offering diverse courses across multiple campuses, emphasizing high research activity and extensive educational programs. |
11,445 |
| 5 |
W. L. Gore & Associatesgore.com
A global materials science company solving technical challenges in diverse environments, generating annual revenues of $48 billion, and improving lives |
10,358 |
| 6 |
State of Delawarestatejobs.delaware.gov
Providing diverse career opportunities within state agencies, delivering vital public services that protect communities and improve quality of life. |
9,417 |
| 7 |
ChristianaCarecareers.christianacare.org
A leading health care provider in Delaware offering value-based care to the community through hospitals, medical residents, specialized services, and awards for excellence |
9,189 |
| 8 |
CSCcscglobal.com
Global business administration and compliance solutions for alternative asset managers, capital markets, digital brand protection, domain management, and corporate tax software services. |
8,233 |
| 9 | 6,095 | |
| 10 |
Ashlandashland.com
This company provides additives and specialty ingredients to various consumer and industrial markets globally, focusing on innovative solutions for complex customer problems. |
5,843 |
| 11 | 4,635 | |
| 12 |
The Chemours Companychemours.com
A company driven by chemistry, providing sustainable solutions for various industries like automotive, electronics, energy, and construction through Courageous Chemistryโข |
4,528 |
| 13 |
Houghton Mifflin Harcourthmhco.com
Provides adaptive learning solutions and integrated K-12 learning materials for core, supplemental, intervention, assessment, and professional development delivered on a streamlined platform. |
4,150 |
| 14 |
Enovisenovis.com
A medical technology company creating innovative solutions for better patient outcomes, improved workflows, and active lifestyles through collaboration with healthcare professionals |
3,892 |
| 15 |
AAA Club Allianceaaa.com
This company has been providing assistance for over 100 years, offering insurance, retail, and travel services while prioritizing employee satisfaction and career development |
3,449 |
| 16 |
Incyteincyte.com
Global biopharmaceutical company focused on discovering, developing, and commercializing innovative medicines for patients with unmet medical needs in Oncology and Inflammation & Autoimmunity. |
3,425 |
| 17 |
Sallie Maesalliemae.com
Private student lending leader supporting affordable, equitable, and accessible college education through financing, expertise, and resources for students and families |
3,166 |
| 18 |
Bayhealthbayhealth.org
Largest healthcare system in central and southern Delaware, offering hospital services, emergency care, multiple specialties, and community health support. |
2,592 |
| 19 |
The Apache Software Foundationapache.org
Global nonprofit supporting and sustaining open-source software projects, fostering developer communities, and advancing industry standards for public benefit. |
2,474 |
| 20 |
Anyone AIanyoneai.com
Company investing in AI talent from Latam, bridging the talent gap VC-backed by global investors, experts in AI/ML with Fortune 500 experience Join our AI community |
2,305 |
| 21 |
Mountaire Farmsmountaire.com
A leading chicken producer with operations in multiple states, dedicated to high quality products and animal welfare for consumers worldwide |
2,249 |
| 22 |
Delaware Technical Community Collegedtcc.edu
Statewide community college offering affordable post-secondary education, workforce development, and lifelong learning opportunities to meet labor market and community needs |
2,216 |
| 23 |
Wilmington Trustwilmingtontrust.com
The company provides wealth management, global capital markets, and institutional retirement services with a focus on client relationships, innovation, and trust |
2,074 |
| 24 |
Red Clay Consolidated School Districtredclayschools.com
Leading Delaware public school district providing opportunity and excellence for 18,000 students in 32 schools, recognized for academic achievements and awards |
2,073 |
| 25 |
Delaware State Universitydesu.edu
Delaware State University is a premier HBCU offering diverse education, research opportunities, and degree programs in high-demand career fields |
2,029 |
| 26 |
WSFS Bankwsfsbank.com
Multibillion-dollar financial services company offering commercial banking, consumer banking, treasury management, trust, and wealth management in multiple states. |
2,017 |
| 27 |
Wilmington Universitywilmu.edu
Non-profit university offering affordable, flexible undergraduate and graduate programs with multiple locations and online learning options for diverse students. |
1,956 |
| 28 |
CAPcap.casemail.us
Provider of Online Postal & Electronic correspondence services for universities and law schools, reducing costs and risks associated with critical communications |
1,880 |
| 29 |
Magicgetmagic.com
Provides a world-class assistant service designed to help scale business and personal life without limitations. Focus on getting everything done. |
1,852 |
| 30 |
Exide Technologies, LLCcases.ra.kroll.com
Battery manufacturing and recycling businesses sold through court-supervised auction following Chapter 11 bankruptcy filing in 2020. |
1,807 |
| 31 |
Emerging Travel Groupemergingtravel.com
A pioneering travel-tech company offering a vast selection of accommodations worldwide, with a diverse team dedicated to simplifying and enhancing the travel experience for all |
1,713 |
| 32 |
Beebe Healthcarebeebecareers.org
A not-for-profit community hospital in Delaware offering a range of inpatient, outpatient, emergency, and diagnostic services, specialized in various medical specialties |
1,712 |
| 33 |
Integrity Staffing Solutionsintegritystaffing.com
Connecting great talent with companies, generating opportunities for success, and driving the workforce forward with thousands of job opportunities available nationwide |
1,642 |
| 34 |
The Siegfried Groupsiegfriedgroup.com
An entrepreneurial leadership organization providing financial executives with leadership advisory, talent delivery, and financial advisory services to help them succeed |
1,595 |
| 35 |
EDBenterprisedb.com
A global provider of enterprise-class software and services for harnessing the power of Postgres, offering high availability, reliability, security, and 24x7 support |
1,534 |
| 36 |
Phreesiaphreesia.com
Innovative technology empowering healthcare organizations to understand and engage patients for better care experiences and efficiency in managing visits |
1,497 |
| 37 |
Christina School Districtchristinak12.org
A Delaware public school system serving over 14,000 students and employing 2,600 people in Newark, Wilmington, and surrounding areas |
1,465 |
| 38 | 1,462 | |
| 39 | 1,255 | |
| 40 |
Cruise Planners Travel Agencycruisewithafriend.com
Since 1994, this Florida-based travel service connects business and leisure travelers with ideal cruises through franchisees working from home |
1,171 |
| 41 |
St. Andrew's Schoolstandrews-de.org
Episcopal co-ed boarding high school in Middletown, Delaware, offering a comprehensive education on a vast 2200-acre campus |
1,143 |
| 42 |
Colonial School Districtcolonialschooldistrict.org
A public school district in New Castle, Delaware serving grades K through 12 with 8 elementary schools, 3 middle schools, and one high school |
1,111 |
| 43 |
Trinity Logisticstrinitylogistics.com
A leading Third-Party Logistics provider specializing in freight management, transportation solutions, warehousing, distribution, and direct-to-consumer services with a people-centric approach |
1,059 |
| 44 | 1,032 | |
| 45 |
LabWarelabware.com
Global leader in enterprise-scale laboratory automation solutions, offering integrated LIMS, ELN, LES, method execution, SDMS, and data analytics for optimized compliance and productivity |
1,030 |
| 46 |
Supersidesuperside.com
A leading Creative-as-a-Service company helping brands obtain design and creative work at scale for marketing, advertising, and branding needs |
1,017 |
| 47 |
New Castle County (DE) Governmentnewcastlede.gov
The New Castle County Government is a municipal government in Delaware with an Executive-Council form, serving a population of 526,000 residents |
1,006 |
| 48 |
Writer's Reliefwritersrelief.com
An author's submission service that helps writers connect with literary agents and editors, offers publishing resources, and provides personalized submission assistance |
952 |
| 49 |
Chem-Aqua, Inc.chemaqua.com
A leading provider of custom water treatment solutions for boiler, cooling, and process water systems, focusing on energy efficiency and cost savings |
950 |
| 50 |
Wholesome Alivewholesomealive.com
An online healthcare media platform providing easy-to-read, authoritative, and interactive medical information to educate and inform readers about various health topics |
918 |
| 51 |
Indian River School Districtirsd.net
A school district in Delaware serving over 10,000 students with award-winning schools, high test scores, and recognition for technological innovation |
912 |
| 52 |
goLancegolance.com
An online platform connecting freelancers with remote work opportunities, offering lower costs, high-quality talent, and a fee-friendly hiring process |
912 |
| 53 |
21st Century Insurance21st.com
Specializing in customized auto insurance, providing great coverage at a lower cost as part of a leading personal lines insurer |
853 |
| 54 |
Soul AIdeccanexperts.ai
An Enterprise AI firm providing RLHF and Custom AI solutions, led by an experienced team, prioritizing employee wellness and offering remote AI trainer opportunities |
852 |
| 55 |
Burris Logisticsburrislogistics.com
Leading controlled-temperature food distribution company with custom storage and transportation programs, known for family-owned values and commitment to customers |
831 |
| 56 |
RightChoice.airightchoice.ai
Top-rated local marketing software using AI to help businesses grow and rank locally Get listed on 30+ directories for increased visibility and success |
796 |
| 57 |
Barclays Bank UScards.barclaycardus.com
A leading financial services partner providing co-branded credit cards, loans, online savings accounts, and global banking services to diverse clientele |
791 |
| 58 |
Amphenol Aerospaceamphenol-aerospace.com
Designs and manufactures high-quality, rugged interconnect solutions for military and commercial aerospace markets, including circular, rectangular, fiber optic connectors, and integrated systems. |
773 |
| 59 | 768 | |
| 60 |
Numpy Ninjanumpyninja.com
A fast-growing all women team specializing in data science and AI, focused on innovative solutions for healthcare, business, and personal goals |
766 |
| 61 |
Codingalcodingal.com
Provides online AI and coding education for kids and teens, offering live, interactive classes and personalized learning paths for future tech leaders. |
763 |
| 62 |
The LYCRA Companylycra.com
The company innovates and produces fiber solutions for apparel and hygiene industries, creating quality spandex and specialty chemicals for comfort and performance |
730 |
| 63 | 725 | |
| 64 |
QPS Holdings, LLCqps.com
A global contract research organization specializing in discovery, preclinical, and clinical drug development services with a focus on bioanalytics and clinical trials |
719 |
| 65 |
EC Innovations, Inc.ecinnovations.com
Deliver bespoke localization services combining technology, linguistics, and expertise to create authentic local versions of key assets worldwide. |
717 |
| 66 |
DuPontโข Spectrumโขspectrumplastics.com
Leading partner in developing and manufacturing critical polymer-based components and finished devices for medical and demanding applications. |
704 |
| 67 |
EvonSysevonsys.com
Industry leaders with decades of experience delivering digital transformation solutions globally, specializing in BPM implementations across various sectors with development centers worldwide |
701 |
| 68 |
Attentive.aiattentive.ai
AI-powered software for landscape management, with end-to-end automation for field service businesses in landscaping, paving, facilities maintenance, and snow removal industries Trusted by over 500 businesses |
697 |
| 69 |
OWASPยฎ Foundationowasp.org
Worldwide free open community improves software security, making application security visible for informed decisions regarding application security risks. |
683 |
| 70 |
Bel Fuse Inc.belfuse.com
Designs, manufactures, and markets products for powering, protecting, and connecting electronic circuits. A global supplier with technical innovation and cost-effective solutions. |
676 |
| 71 |
CAPITAL SCHOOL DISTRICTcapital.k12.de.us
A district dedicated to educational excellence, working in partnership with students, families, and the community to help all students reach their potential |
667 |
| 72 |
TekisHub Consulting Servicestekishub.com
Staff augmentation, software development, and recruitment process outsourcing company providing multi-platform application solutions globally from USA and India Specializing in high-quality service and cost-effective solutions |
658 |
| 73 |
TA Instrumentstainstruments.com
Develops and supplies instruments for material characterization, including thermal analysis, rheology, and microcalorimetry, used for research, analysis, and quality control. |
655 |
| 74 |
Caesar Rodney School Districtcrk12.org
This school district in Camden, DE provides education services to students in the area, striving for student success and academic excellence |
632 |
| 75 |
Best Eggbestegg.com
A consumer financial technology platform offering personal loans, credit cards, and financial resources with a focus on inclusivity and growth opportunities |
623 |
| 76 |
Interview Kickstartinterviewkickstart.com
A global leader in career up-leveling for tech professionals, offering industry-acclaimed courses, personalized coaching, and connections to top tech companies for guaranteed interview success |
621 |
| 77 |
Datavalley Incdatavalley.ai
A leading provider of training and consulting services in Big Data, Data Science, DevOps, IoT, and Cloud Technologies, delivering innovative data solutions tailored to clients' needs |
618 |
| 78 |
Solution Analystssolutionanalysts.com
A global enterprise software development company specializing in mobile, web, and IoT solutions, leveraging AI, AR, VR, and blockchain technologies for client success |
608 |
| 79 |
InterDigital, Inc.interdigital.com
This company develops mobile and video technologies for devices, networks, and services globally, focusing on efficient broadband networks and advanced multimedia experiences |
600 |
| 80 |
.efficientlyefficiently.com
A productivity partner offering tools and solutions to streamline work, increase effectiveness, improve collaboration, and maximize productivity in various industries |
595 |
| 81 | 593 | |
| 82 |
Cerebralcerebral.com
Cerebral is revolutionizing mental healthcare by providing convenient, accessible, and stigma-free treatment with impressive patient outcomes |
586 |
| 83 | 584 | |
| 84 |
Cape Henlopen School Districtcapehenlopenschools.com
Comprehensive school district providing world-class education from Pre-K to 12th grade, preparing students for success in a diverse global society |
582 |
| 85 |
Rain Carbon Incraincarbon.com
Global producer of carbon-based products and advanced materials, transforming byproducts into high-value products for industrial processes and manufactured goods worldwide |
575 |
| 86 |
Four Seasons Healthcarefour-health.com
Non-medical provider of in-home care in Pennsylvania and Delaware, offering RN-supervised services with a focus on professional medical staff and regulatory compliance |
571 |
| 87 |
ILC Doverilcdover.com
A global leader in innovative solutions for biopharmaceutical, pharmaceutical, and aerospace industries with a focus on flexible protective solutions since 1947 |
568 |
| 88 |
DuPont Water Solutionsdupont.com
The company provides solutions for a sustainable energy and water future globally, assisting businesses in making real progress in every industry |
558 |
| 89 |
Careermindscareerminds.com
This company offers outplacement, executive coaching, and career development services globally in multiple languages using technology and personalized coaching |
552 |
| 90 |
Patterson-Schwartz Real Estatepattersonschwartz.com
Leading real estate company in Delaware with over 50 years of experience, offering residential sales, rentals, relocation services, property management, and home services |
543 |
| 91 |
RateHawkratehawk.com
An innovative B2B online booking engine offering hotels, air tickets, transfers, and car hire globally with a focus on customer satisfaction and competitive pricing |
540 |
| 92 |
Team Realty-Squaredthekwppexperience.com
An independent real estate brokerage in Upper Marlboro, MD specializing in residential and commercial sales, leasing, short-sales, foreclosures, and bank-owned REOs |
529 |
| 93 | 511 | |
| 94 |
Kissflowkissflow.com
Empowering business leaders with a top Work Platform for digital transformation through low-code/no-code technology, trusted globally by enterprises |
504 |
| 95 |
ASAP Ticketsasaptickets.com
A customer-focused travel agency providing discounted airfares, 24/7 live service in multiple languages, expert advice, and concierge services for a seamless travel experience |
497 |
| 96 |
Chesapeake Utilities Corporationchpk.com
A diversified energy delivery company offering sustainable solutions in natural gas, electricity, propane, and renewable natural gas services, recognized for corporate governance and workplace environment |
492 |
| 97 |
ITILITEitilite.com
A fast-growing corporate travel management software simplifying bookings, saving money, and providing 24/7 support for multinational brands to streamline travel expenses |
483 |
| 98 |
YMCA of Delawareymcade.org
The organization provides youth development, healthy living, and social responsibility programs in Delaware, including diabetes prevention and healthy lifestyles behavior change programs |
483 |
| 99 |
Seacretseacret.com
This company manufactures skincare products using minerals and salts from the Dead Sea, focusing on purity, effectiveness, and ethical practices |
482 |
| 100 |
Prince Telecom LLCprincetelecom.com
A fulfillment provider for the telecommunications industry, offering a wide range of services including installations, deployments, construction, and special projects nationwide |
479 |
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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.
More company lists in Delaware
- SaaS companies in Delaware 90
- IT Services and IT Consulting companies in Delaware 81
- Software Development companies in Delaware 71
- IT services companies in Delaware 48
- AI-native companies in Delaware 32
- Technology, Information and Internet companies in Delaware 31
- Financial Services companies in Delaware 25
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