# Top 33 companies with in-house R&D in Delaware

Tamtam tracks 33 companies with in-house R&D headquartered in Delaware. This list ranks all of them by number of employees on LinkedIn, led by DuPont, Solenis and University of Delaware. Their median headcount is 676. Half of them were founded in 1995 or later. The most common headquarters are Wilmington (21), Newark (5) and New Castle (2).

The companies in Delaware with in-house R&D are primarily established firms in manufacturing, chemicals, and healthcare, alongside a significant educational institution. DuPont, a global company, focuses on essential innovations, while Solenis provides sustainable chemical solutions for water-intensive industries. W. L. Gore & Associates is a materials science company, and ChristianaCare is a leading healthcare provider.

The data shows a strong concentration of headquarters in Wilmington and Newark, indicating these cities as key hubs for research and development activities in the state. Many of these companies have a long history, with several founded in the early to mid-20th century, suggesting a mature industrial base.

🇺🇸 Delaware · 33 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 | [University of Delaware](https://www.tamtam.ai/c/university-of-delaware) (udel.edu)<br>State-assisted university offering diverse courses across multiple campuses, emphasizing high research activity and extensive educational programs. | Higher Education | 🇺🇸 Newark | 11,445 | 1743 |
| 4 | [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 |
| 5 | [ChristianaCare](https://www.tamtam.ai/c/christianacare) (careers.christianacare.org)<br>A leading health care provider in Delaware offering value-based care to the community through hospitals, medical residents, specialized services, and awards for excellence | Hospitals and Health Care | 🇺🇸 Newark | 9,189 |  |
| 6 | [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 |
| 7 | [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 |
| 8 | [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 |
| 9 | [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 |  |
| 10 | [EDB](https://www.tamtam.ai/c/edb) (enterprisedb.com)<br>A global provider of enterprise-class software and services for harnessing the power of Postgres, offering high availability, reliability, security, and 24x7 support | Software Development | 🇺🇸 Wilmington | 1,534 |  |
| 11 | [Phreesia](https://www.tamtam.ai/c/phreesia) (phreesia.com)<br>Innovative technology empowering healthcare organizations to understand and engage patients for better care experiences and efficiency in managing visits | Hospitals and Health Care | 🇺🇸 Wilmington | 1,497 | 2005 |
| 12 | [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 |
| 13 | [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 |
| 14 | [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 |
| 15 | [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 |
| 16 | [QPS Holdings, LLC](https://www.tamtam.ai/c/qps-holdings-llc) (qps.com)<br>A global contract research organization specializing in discovery, preclinical, and clinical drug development services with a focus on bioanalytics and clinical trials | Pharmaceutical Manufacturing | 🇺🇸 Newark | 719 | 1995 |
| 17 | [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 |  |
| 18 | [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 |
| 19 | [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 |
| 20 | [InterDigital, Inc.](https://www.tamtam.ai/c/interdigital-inc) (interdigital.com)<br>This company develops mobile and video technologies for devices, networks, and services globally, focusing on efficient broadband networks and advanced multimedia experiences | Telecommunications | 🇺🇸 Wilmington | 600 | 1972 |
| 21 | [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 |  |
| 22 | [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 |  |
| 23 | [Locus](https://www.tamtam.ai/c/locus) (locus.sh)<br>A technology company solving global logistics challenges with an order-to-delivery dispatch management platform, optimization algorithms, workflow automation, and efficiency tools | Software Development | 🇺🇸 Wilmington | 353 | 2015 |
| 24 | [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 |  |
| 25 | [Devart](https://www.tamtam.ai/c/devart) (devart.com)<br>A database tools and native data access solutions provider with 20+ years of experience, serving thousands of customers worldwide with a focus on innovation and user support | Software Development | 🇺🇸 Wilmington | 253 | 1997 |
| 26 | [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 |  |
| 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 | [Smart Analytica](https://www.tamtam.ai/c/smart-analytica) (smart-analytica.com)<br>Specializes in data modernization, analytics, AI solutions, and secure data platform enhancement across cloud and on-premises environments. | IT Services and IT Consulting | 🇺🇸 Newark | 193 | 2023 |
| 29 | [iZOOlogic](https://www.tamtam.ai/c/izoologic) (izoologic.com)<br>A company specializing in tailored threat intelligence, incident response, brand monitoring, and global security enforcement for leading Enterprise and Government organizations | Technology, Information and Internet | 🇺🇸 Wilmington | 72 | 2015 |
| 30 | [Versogen](https://www.tamtam.ai/c/versogen) (versogen.com)<br>A leader in the global energy transition, using breakthrough electrolyzer technology to produce green hydrogen at scale, reducing industrial carbon emissions for a sustainable energy future | Renewable Energy Semiconductor Manufacturing | 🇺🇸 Wilmington | 21 | 2018 |
| 31 | [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 |  |
| 32 | [SHYP BV LTD](https://www.tamtam.ai/c/shyp-bv-ltd) (shypbv.com)<br>The company produces green hydrogen and co-products from seawater using membraneless electrolyzer systems for sustainable water, CO2 capture, and net zero goals | Services for Renewable Energy | 🇺🇸 Wilmington | 2 | 2019 |
| 33 | [THERAONCO](https://www.tamtam.ai/c/theraonco) (theraonco.com)<br>A cutting-edge company utilizing modified sugars to deliver targeted anti-cancer payloads to tumor cells through innovative click chemistry technology | Biotechnology Research | 🇺🇸 Marseille | 1 | 2022 |

## 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.

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## The same list elsewhere in United States

- [Companies with in-house R&D in the United States](https://www.tamtam.ai/l/r-and-d-companies-united-states) (6,796)
- [Companies with in-house R&D in California](https://www.tamtam.ai/l/r-and-d-companies-california) (1,276)
- [Companies with in-house R&D in Texas](https://www.tamtam.ai/l/r-and-d-companies-texas) (442)
- [Companies with in-house R&D in New York State](https://www.tamtam.ai/l/r-and-d-companies-new-york-state) (419)
- [Companies with in-house R&D in Massachusetts](https://www.tamtam.ai/l/r-and-d-companies-massachusetts) (396)
- [Companies with in-house R&D in Illinois](https://www.tamtam.ai/l/r-and-d-companies-illinois) (322)
- [Companies with in-house R&D in Michigan](https://www.tamtam.ai/l/r-and-d-companies-michigan) (287)
- [Companies with in-house R&D in Ohio](https://www.tamtam.ai/l/r-and-d-companies-ohio) (277)
- [Companies with in-house R&D in Pennsylvania](https://www.tamtam.ai/l/r-and-d-companies-pennsylvania) (255)
- [Companies with in-house R&D in New Jersey](https://www.tamtam.ai/l/r-and-d-companies-new-jersey) (224)
- [Companies with in-house R&D in Florida](https://www.tamtam.ai/l/r-and-d-companies-florida) (221)
- [Companies with in-house R&D in Alabama](https://www.tamtam.ai/l/r-and-d-companies-alabama) (214)
- [Companies with in-house R&D in Georgia](https://www.tamtam.ai/l/r-and-d-companies-georgia) (173)
- [Companies with in-house R&D in Virginia](https://www.tamtam.ai/l/r-and-d-companies-virginia) (166)
- [Companies with in-house R&D in North Carolina](https://www.tamtam.ai/l/r-and-d-companies-north-carolina) (158)
- [Companies with in-house R&D in Wisconsin](https://www.tamtam.ai/l/r-and-d-companies-wisconsin) (154)
- [Companies with in-house R&D in Minnesota](https://www.tamtam.ai/l/r-and-d-companies-minnesota) (146)
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- [Companies with in-house R&D in Colorado](https://www.tamtam.ai/l/r-and-d-companies-colorado) (113)
- [Companies with in-house R&D in Maryland](https://www.tamtam.ai/l/r-and-d-companies-maryland) (107)
- [Companies with in-house R&D in Indiana](https://www.tamtam.ai/l/r-and-d-companies-indiana) (104)
- [Companies with in-house R&D in New York](https://www.tamtam.ai/l/r-and-d-companies-new-york) (223)
- [Companies with in-house R&D in San Francisco](https://www.tamtam.ai/l/r-and-d-companies-san-francisco) (147)
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Source: https://www.tamtam.ai/l/r-and-d-companies-delaware