# List of manufacturers in Delaware

Tamtam tracks 34 manufacturers headquartered in Delaware. This list ranks all of them by number of employees on LinkedIn, led by DuPont, Solenis and W. L. Gore & Associates. Their median headcount is 575. Half of them were founded in 1979 or later. The most common headquarters are Wilmington (16), Newark (4) and Dover (2).

The manufacturing sector in Delaware is characterized by a strong presence of chemical manufacturing and materials science companies. These are primarily large, established firms, with several founded in the early to mid-20th century. Notable companies include DuPont, a global firm focused on essential innovations, and Solenis, a specialty chemicals producer for water-intensive industries.

Other significant players are W. L. Gore & Associates, a materials science company, and Ashland, which provides additives and specialty ingredients. The Chemours Company, driven by chemistry for various industries, and Incyte, a biopharmaceutical company focused on oncology, are also prominent. A clear pattern is the concentration of headquarters in Wilmington, indicating its importance as a commercial hub for these industries.

🇺🇸 Delaware · 34 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [DuPont](https://www.tamtam.ai/c/dupont) (dupont.com)<br>A global company focused on creating essential innovations, uncovering insights, and inventing a better now for a brighter future | Manufacturing | 🇺🇸 Wilmington | 22,104 |  |
| 2 | [Solenis](https://www.tamtam.ai/c/solenis) (solenis.com)<br>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 | Chemical Manufacturing | 🇺🇸 Wilmington | 21,407 | 1907 |
| 3 | [W. L. Gore & Associates](https://www.tamtam.ai/c/w-l-gore-and-associates) (gore.com)<br>A global materials science company solving technical challenges in diverse environments, generating annual revenues of $48 billion, and improving lives | Manufacturing | 🇺🇸 Newark | 10,358 | 1958 |
| 4 | [Ashland](https://www.tamtam.ai/c/ashland) (ashland.com)<br>This company provides additives and specialty ingredients to various consumer and industrial markets globally, focusing on innovative solutions for complex customer problems. | Chemical Manufacturing | 🇺🇸 Wilmington | 5,843 | 1924 |
| 5 | [NCH](https://www.tamtam.ai/c/nch) (nch.com)<br>A global provider of industrial maintenance solutions, offering water cleaning, energy conservation, and maintenance products for commercial and industrial businesses worldwide | Chemical Manufacturing | 🇺🇸 Wilmington | 4,635 |  |
| 6 | [The Chemours Company](https://www.tamtam.ai/c/the-chemours-company) (chemours.com)<br>A company driven by chemistry, providing sustainable solutions for various industries like automotive, electronics, energy, and construction through Courageous Chemistry™ | Chemical Manufacturing | 🇺🇸 Wilmington | 4,528 | 2015 |
| 7 | [Enovis](https://www.tamtam.ai/c/enovis) (enovis.com)<br>A medical technology company creating innovative solutions for better patient outcomes, improved workflows, and active lifestyles through collaboration with healthcare professionals | Hospitals and Health Care | 🇺🇸 Wilmington | 3,892 | 2022 |
| 8 | [Incyte](https://www.tamtam.ai/c/incyte) (incyte.com)<br>Global biopharmaceutical company focused on discovering, developing, and commercializing innovative medicines for patients with unmet medical needs in Oncology and Inflammation & Autoimmunity. | Pharmaceutical Manufacturing | 🇺🇸 Wilmington | 3,425 |  |
| 9 | [Mountaire Farms](https://www.tamtam.ai/c/mountaire-farms) (mountaire.com)<br>A leading chicken producer with operations in multiple states, dedicated to high quality products and animal welfare for consumers worldwide | Food and Beverage Manufacturing | 🇺🇸 Millsboro | 2,249 | 1914 |
| 10 | [FS.com](https://www.tamtam.ai/c/fs-com) (fs.com)<br>A leading provider of network solutions for Data Center, Enterprise, and Telecom globally, offering optical communication products and tailored project solutions | Technology, Information and Internet | 🇺🇸 New Castle | 1,255 | 2009 |
| 11 | [Chem-Aqua, Inc.](https://www.tamtam.ai/c/chem-aqua-inc) (chemaqua.com)<br>A leading provider of custom water treatment solutions for boiler, cooling, and process water systems, focusing on energy efficiency and cost savings | Chemical Manufacturing | 🇺🇸 Wilmington | 950 | 1919 |
| 12 | [Amphenol Aerospace](https://www.tamtam.ai/c/amphenol-aerospace) (amphenol-aerospace.com)<br>Designs and manufactures high-quality, rugged interconnect solutions for military and commercial aerospace markets, including circular, rectangular, fiber optic connectors, and integrated systems. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Sidney | 773 | 1925 |
| 13 | [The LYCRA Company](https://www.tamtam.ai/c/the-lycra-company) (lycra.com)<br>Innovates and produces fiber and technology solutions for global apparel and hygiene industries, focusing on comfort and lasting performance benefits for clothing across many categories. | Textile Manufacturing | 🇺🇸 Wilmington | 611 | 1958 |
| 14 | [DuPont™ Spectrum™](https://www.tamtam.ai/c/dupont-spectrum) (spectrumplastics.com)<br>Leading partner in developing and manufacturing critical polymer-based components and finished devices for medical and demanding applications. | Manufacturing | 🇺🇸 Wilmington | 704 |  |
| 15 | [Bel Fuse Inc.](https://www.tamtam.ai/c/bel-fuse-inc) (belfuse.com)<br>Designs, manufactures, and markets products for powering, protecting, and connecting electronic circuits. A global supplier with technical innovation and cost-effective solutions. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 West Orange | 676 | 1949 |
| 16 | [TA Instruments](https://www.tamtam.ai/c/ta-instruments) (tainstruments.com)<br>Develops and supplies instruments for material characterization, including thermal analysis, rheology, and microcalorimetry, used for research, analysis, and quality control. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 New Castle | 655 | 1990 |
| 17 | [Rain Carbon Inc](https://www.tamtam.ai/c/rain-carbon-inc) (raincarbon.com)<br>Global producer of carbon-based products and advanced materials, transforming byproducts into high-value products for industrial processes and manufactured goods worldwide | Chemical Manufacturing | 🇺🇸 Dover | 575 |  |
| 18 | [ILC Dover](https://www.tamtam.ai/c/ilc-dover) (ilcdover.com)<br>A global leader in innovative solutions for biopharmaceutical, pharmaceutical, and aerospace industries with a focus on flexible protective solutions since 1947 | Pharmaceutical Manufacturing | 🇺🇸 Frederica | 568 | 1947 |
| 19 | [DuPont Water Solutions](https://www.tamtam.ai/c/dupont-water-solutions) (dupont.com)<br>The company provides solutions for a sustainable energy and water future globally, assisting businesses in making real progress in every industry | Environmental Services | 🇺🇸 Wilmington | 558 |  |
| 20 | [Seacret](https://www.tamtam.ai/c/seacret) (seacret.com)<br>This company manufactures skincare products using minerals and salts from the Dead Sea, focusing on purity, effectiveness, and ethical practices | Personal Care Product Manufacturing | 🇺🇸 Dover | 482 | 2004 |
| 21 | [SDIX LLC - An OriGene Company](https://www.tamtam.ai/c/sdix-llc-an-origene-company) (sdix.com)<br>produces high-quality, large-scale, GMP antibodies and immunoreagents for diagnostics, offering contract manufacturing and antibody production services, all manufactured in the USA. | Biotechnology Research | 🇺🇸 Newark | 411 | 1990 |
| 22 | [Crystal Steel Fabricators, Inc.](https://www.tamtam.ai/c/crystal-steel-fabricators-inc) (crystalsteel.com)<br>A global steel fabricator with multiple locations, offering quality steel fabrication, design, and delivery services to clients on the East Coast | Construction | 🇺🇸 Delmar | 347 | 1992 |
| 23 | [SPI Pharma](https://www.tamtam.ai/c/spi-pharma) (spipharma.com)<br>Supplies pharmaceutical industry with engineered products and innovative solutions, improving drug formulation and delivery for patient needs with functional excipients and active ingredients. | Pharmaceutical Manufacturing | 🇺🇸 Wilmington | 317 |  |
| 24 | [Allen Harim Foods](https://www.tamtam.ai/c/allen-harim-foods) (allenharimllc.com)<br>A leading producer of No Antibiotic Ever chicken, prioritizing quality, service, and value while also focusing on animal welfare, the environment, and community | Food and Beverage Manufacturing | 🇺🇸 Millsboro | 267 | 1919 |
| 25 | [Laird Performance Materials](https://www.tamtam.ai/c/laird-performance-materials) (laird.com)<br>Enables and improves signal integrity and power transmission in advanced interconnects; protects electronics, manages electromagnetic interference and heat, custom precision metal parts | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Wilmington | 219 |  |
| 26 | [Allied Moulded Products, Inc](https://www.tamtam.ai/c/allied-moulded-products-inc) (alliedmoulded.com)<br>Manufactures nonmetallic electrical boxes and enclosures for residential, commercial, and industrial markets, offering a range of products and custom solutions with focus on quality and innovation. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Bryan | 209 |  |
| 27 | [Noramco](https://www.tamtam.ai/c/noramco) (noramco.com)<br>Global leader in manufacturing controlled substances for pharmaceutical medicines, including those for ADHD, pain, and addiction, ensuring DEA-compliant security and supply from kilos to multi-tons. | Pharmaceutical Manufacturing | 🇺🇸 Wilmington | 201 | 1979 |
| 28 | [Summit Aviation](https://www.tamtam.ai/c/summit-aviation) (summit-aviation.com)<br>Aircraft maintenance, modifications, avionics, engines, mission equipment integration, paint, sales & leasing, field training, flight testing support, and OTC part sales | Airlines and Aviation | 🇺🇸 Middletown | 183 | 1960 |
| 29 | [Covation Bio](https://www.tamtam.ai/c/covation-bio) (covationbio.com)<br>A leading global innovator offering high-performance, sustainable solutions in various industries through novel bio-based products, building on a rich scientific legacy | Biotechnology Research | 🇺🇸 Newark | 64 |  |
| 30 | [Atlantis Industries Corporation](https://www.tamtam.ai/c/atlantis-industries-corporation) (atlantisusa.com)<br>A leading injection molding company with over 60 years of experience, specializing in serving various industries with innovative plastic manufacturing solutions | Plastics Manufacturing | 🇺🇸 Georgetown | 43 |  |
| 31 | [Colfax Corporation](https://www.tamtam.ai/c/colfax-corporation) (enovis.com)<br>Enovis, formerly known as Colfax, is a publicly traded company Follow us on LinkedIn for updates and information | Hospitals and Health Care | 🇺🇸 Wilmington | 31 | 1995 |
| 32 | [Smartkem](https://www.tamtam.ai/c/smartkem) (smartkem.com)<br>Innovative semiconductor polymer transistors enable cost-effective, high-performance displays like microLED, miniLED, and AMOLED, compatible with existing manufacturing infrastructure | Chemical Raw Materials Manufacturing | 🇺🇸 Wilmington | 27 | 2009 |
| 33 | [Millennium Microwave Corp](https://www.tamtam.ai/c/millennium-microwave-corp) (microwave2000.com)<br>An electrical/electronic manufacturing company located in Seaford, Delaware, specializing in microwave technology and products for various industries | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Seaford | 19 |  |
| 34 | [CV OPTICS USA INC.](https://www.tamtam.ai/c/cv-optics-usa-inc) (cvopticsusa.com)<br>A leading lens manufacturer and distributor offering a wide variety of optical lens types, including specialized products like blue filter and photochromic lenses | Medical Equipment Manufacturing | 🇺🇸 Newark | 7 | 2018 |

## 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 11, 2026.

## More company lists in Delaware

- [The largest companies in Delaware](https://www.tamtam.ai/l/largest-companies-delaware) (579)
- [IT Services and IT Consulting companies in Delaware](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-delaware) (108)
- [Multinational companies in Delaware](https://www.tamtam.ai/l/multinational-companies-delaware) (106)
- [SaaS companies in Delaware](https://www.tamtam.ai/l/saas-companies-delaware) (103)
- [IT services companies in Delaware](https://www.tamtam.ai/l/it-services-companies-delaware) (93)
- [Software Development companies in Delaware](https://www.tamtam.ai/l/software-development-companies-delaware) (83)
- [AI companies in Delaware](https://www.tamtam.ai/l/ai-companies-delaware) (42)
- [Technology, Information and Internet companies in Delaware](https://www.tamtam.ai/l/technology-information-and-internet-companies-delaware) (39)
- [Professional services firms in Delaware](https://www.tamtam.ai/l/professional-services-firms-delaware) (35)
- [AI-native companies in Delaware](https://www.tamtam.ai/l/ai-native-companies-delaware) (33)
- [Companies with in-house R&D in Delaware](https://www.tamtam.ai/l/r-and-d-companies-delaware) (32)
- [Financial Services companies in Delaware](https://www.tamtam.ai/l/financial-services-companies-delaware) (30)
- [AI consultancies and service providers in Delaware](https://www.tamtam.ai/l/ai-service-providers-delaware) (28)
- [Consulting firms in Delaware](https://www.tamtam.ai/l/consulting-firms-delaware) (27)
- [Education providers in Delaware](https://www.tamtam.ai/l/education-companies-delaware) (27)
- [Subscription businesses in Delaware](https://www.tamtam.ai/l/subscription-businesses-delaware) (27)

## The same list elsewhere in United States

- [Manufacturers in the United States](https://www.tamtam.ai/l/manufacturers-united-states) (8,678)
- [Manufacturers in California](https://www.tamtam.ai/l/manufacturers-california) (1,066)
- [Manufacturers in Texas](https://www.tamtam.ai/l/manufacturers-texas) (621)
- [Manufacturers in Illinois](https://www.tamtam.ai/l/manufacturers-illinois) (528)
- [Manufacturers in Ohio](https://www.tamtam.ai/l/manufacturers-ohio) (479)
- [Manufacturers in Michigan](https://www.tamtam.ai/l/manufacturers-michigan) (454)
- [Manufacturers in New York State](https://www.tamtam.ai/l/manufacturers-new-york-state) (398)
- [Manufacturers in Pennsylvania](https://www.tamtam.ai/l/manufacturers-pennsylvania) (364)
- [Manufacturers in Wisconsin](https://www.tamtam.ai/l/manufacturers-wisconsin) (331)
- [Manufacturers in Georgia](https://www.tamtam.ai/l/manufacturers-georgia) (281)
- [Manufacturers in Florida](https://www.tamtam.ai/l/manufacturers-florida) (274)
- [Manufacturers in North Carolina](https://www.tamtam.ai/l/manufacturers-north-carolina) (271)
- [Manufacturers in Massachusetts](https://www.tamtam.ai/l/manufacturers-massachusetts) (269)
- [Manufacturers in Minnesota](https://www.tamtam.ai/l/manufacturers-minnesota) (262)
- [Manufacturers in New Jersey](https://www.tamtam.ai/l/manufacturers-new-jersey) (249)
- [Manufacturers in Indiana](https://www.tamtam.ai/l/manufacturers-indiana) (242)
- [Manufacturers in Alabama](https://www.tamtam.ai/l/manufacturers-alabama) (221)
- [Manufacturers in Washington State](https://www.tamtam.ai/l/manufacturers-washington-state) (176)
- [Manufacturers in Missouri](https://www.tamtam.ai/l/manufacturers-missouri) (162)
- [Manufacturers in Tennessee](https://www.tamtam.ai/l/manufacturers-tennessee) (156)
- [Manufacturers in Colorado](https://www.tamtam.ai/l/manufacturers-colorado) (147)
- [Manufacturers in Connecticut](https://www.tamtam.ai/l/manufacturers-connecticut) (143)
- [Manufacturers in Houston](https://www.tamtam.ai/l/manufacturers-houston) (173)
- [Manufacturers in New York](https://www.tamtam.ai/l/manufacturers-new-york) (141)

---

Source: https://www.tamtam.ai/l/manufacturers-delaware