These companies with in-house R&D in Washington State are primarily large enterprises, many of which are active in software development and technology. Notable examples include Amazon, an e-commerce giant, and Microsoft, which develops software, hardware, and cloud services. Other prominent firms are T-Mobile, a wireless provider, and PACCAR, a global leader in truck manufacturing. The list also features Amazon Web Services (AWS), a cloud computing provider, and Expedia Group, a tech company in the travel industry.
A significant concentration of these companies, including Amazon, Microsoft, and Expedia Group, are headquartered in the Seattle and Redmond areas, highlighting a strong regional hub for technology and research.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Amazonamazon.com
An e-commerce giant offering a vast selection of products, convenient shopping experiences, and fast delivery, connecting buyers with a wide range of sellers |
1,541,000 | |||
| 2 |
Microsoftmicrosoft.com
Develops and sells software, hardware, and cloud services, including the Windows operating system and Office suite, to improve productivity and digital experiences |
233,562 | |||
| 3 |
Amazon Web Services (AWS)amazon.com
A global cloud computing provider offering scalable, reliable, and cost-effective infrastructure services to businesses worldwide, eliminating the need for capital infrastructure expenses |
147,090 | |||
| 4 |
T-Mobilecareers.t-mobile.com
Leading US wireless provider delivering advanced 4G LTE and nationwide 5G networks, prioritizing customer value, service excellence, and innovation in Bellevue, Washington |
96,232 | |||
| 5 |
University of Washingtonwashington.edu
Public research university offering diverse educational programs, extensive campuses, cultural activities, and high-quality medical care, engaging with communities. |
32,106 | |||
| 6 |
Expedia Groupcareers.expediagroup.com
A tech company in the travel industry creating unforgettable experiences, empowering travelers worldwide, and committed to inclusivity and accessibility |
21,829 | |||
| 7 |
PACCARpaccar.com
Global leader in designing, manufacturing, and supporting premium trucks, diesel engines, and financial services, with a focus on environmental responsibility and innovation |
19,393 | |||
| 8 |
Blue Originblueorigin.com
Building affordable access to space and utilizing its resources to benefit Earth Developing reusable rocket engines, launch vehicles, in-space systems, and lunar landers |
12,048 | |||
| 9 |
Washington State Universitywsu.edu
Statewide land-grant university offering research, education, and extension services in agriculture, health, engineering, business, and more across multiple campuses. |
11,522 | |||
| 10 |
Seattle Children'sseattlechildrens.org
Providing compassionate pediatric care, conducting breakthrough research, and supporting families to ensure children receive hope, care, and cures. |
8,756 | |||
| 11 |
Fortivefortive.com
A diverse team of innovators leveraging essential technology to drive global progress in industrial, environmental, healthcare, and safety solutions |
8,485 | |||
| 12 |
Nintendonintendo.com
This company creates video games and entertainment to bring joy to people worldwide, building on a legacy of innovation and fun |
7,706 | |||
| 13 |
Veeam Softwareveeam.com
Provides data backup, recovery, security, and intelligence solutions ensuring business continuity and data availability across hybrid cloud environments worldwide. |
7,308 | |||
| 14 |
Schweitzer Engineering Laboratories (SEL)selinc.com
The company provides products and services for power system protection, monitoring, control, automation, communications, and metering with a focus on safety, reliability, and cost-effectiveness |
7,267 | |||
| 15 |
Microsoft AImicrosoft.ai
The company is a global community dedicated to sharing, discussing, and advancing artificial intelligence research, projects, and skills for all levels |
7,259 | |||
| 16 |
SAP Concurconcur.com
Offers integrated solutions for travel, expense, and invoice management, automating everyday processes and providing insights into spending, compliance, and budget blind spots. |
6,588 | |||
| 17 |
Pacific Northwest National Laboratorypnnl.gov
Research in chemistry, Earth sciences, biology, and data science to enhance energy resiliency and support national security efforts. |
6,257 | |||
| 18 | 6,192 | ||||
| 19 |
Fred Hutchfredhutch.org
Nonprofit organization specializing in cancer research and treatment, collaborating with UW Medicine to provide comprehensive cancer care services. |
6,180 | |||
| 20 |
Itron, Inc.na.itron.com
This company enables utilities and cities worldwide to deliver critical infrastructure services through smart networks, software, meters, and sensors for energy and water management |
5,820 | |||
| 21 |
Millimanid.milliman.com
Independent consulting firm providing actuarial services, employee benefits, healthcare, investment, life insurance, and financial services to business, government, union, and nonprofit organizations worldwide. |
4,474 | |||
| 22 |
ZoomInfozoominfo.com
Provides go-to-market platform, accurate data, insights, and technology for businesses to find, acquire, and grow customers efficiently, aligning sales and marketing. |
4,211 | |||
| 23 |
Smartsheetsmartsheet.com
Enterprise work management platform enabling organizations to move faster, drive innovation, and achieve more through process automation and collaboration tools |
4,015 | |||
| 24 | 3,515 | ||||
| 25 |
Centificcentific.com
Engineering platforms and curating multilingual data for enterprise clients while providing pre-trained datasets, fine-tuned LLMs, and RAG pipelines for faster AI deployment. |
3,352 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Fluke Corporationfluke.com
Manufacturer and distributor of electronic test tools and software, providing essential technology for safer, smarter industrial and electrical applications. |
3,317 | |||
| 27 |
Kenworth Truck Co.kenworth.com
A global leader in manufacturing heavy and medium duty trucks with a focus on fuel-saving technology solutions, premium truck design, and customer support services |
3,075 | |||
| 28 |
Proprioproprio.ai
creating new ways of seeing in surgery through a proprietary platform of artificial intelligence, computer vision, and augmented/virtual reality, significantly improving patient outcomes and surgeon wellbeing. |
2,129 | |||
| 29 |
AGC Biologicsagcbio.com
Provides world-class development and manufacturing of therapeutic proteins, plasmid DNA, messenger RNA, viral vectors, and genetically engineered cell therapies globally. |
2,525 | |||
| 30 |
Icertisicertis.com
It provides AI-powered contract management solutions, helping businesses gain insights, automate processes, control costs, and ensure compliance globally. |
2,414 | |||
| 31 |
Crane Aerospace & Electronicscraneae.com
Supplies critical systems and components to aerospace and defense markets. Offerings include cabin, fluid, landing, microelectronics, microwave, power, sensing, and utility systems. |
2,077 | |||
| 32 |
Hoyahoya.co.jp
A global enterprise specializing in advanced optics technologies, offering products and services in information technologies, eye care, medical, and imaging systems |
1,932 | |||
| 33 |
Anker Innovationsanker-in.com
Consumer electronics company founded in 2011, specializing in fast charging products, audio/video electronics, home appliances, and smart security solutions |
1,865 | |||
| 34 |
University of Washington - School of Medicineuwmedicine.org
A medical school focused on training primary-care physicians and advancing medical knowledge through research in the WWAMI region |
1,788 | |||
| 35 |
Wizards of the Coastcompany.wizards.com
Develops global gaming communities through trading card games, roleplaying experiences, digital play, board games, novels, movies, and diverse entertainment merchandise across multiple brands. |
1,788 | |||
| 36 |
Tableautableau.com
Provides software tools enabling users to visualize, analyze, and interpret data for better decision-making and actionable insights. |
1,788 | |||
| 37 |
Valve corporationvalvesoftware.com
Develops entertainment software, game engine, and a leading digital content platform. Also creates cutting-edge VR products and hardware devices for gaming. |
1,843 | |||
| 38 |
Brooks Runningbrooksrunning.com
Designing and engineering running shoes and gear focused on inclusivity, performance, and community, driven by a strong company culture. |
1,745 | |||
| 39 |
NCSOFT Westncsoft.com
A global publisher of popular online and mobile games, dedicated to bringing entertainment and happiness to millions of players worldwide |
1,739 | |||
| 40 |
Outreachoutreach.ai
It provides a comprehensive sales execution platform that enhances efficiency in prospecting, deal management, and forecasting for revenue teams. |
1,579 | |||
| 41 |
Allen Institutealleninstitute.org
An open science organization focused on advancing bioscience to improve human health through foundational research, developing standards, and fostering new ideas |
1,452 | |||
| 42 |
Pyrotekpyrotek.com
Global engineering leader providing performance-improving technical solutions for industries like aluminium, glass, and automotive with a focus on innovation and customer satisfaction |
1,314 | |||
| 43 |
Amazon Game Studiosamazon.jobs
Amazon Games is a player-obsessed gaming company creating original IP and high-ambition games across platforms, fostering creativity and innovation |
1,277 | |||
| 44 |
Bungiecareers.bungie.com
This company creates popular gaming franchises that inspire player communities and friendships, with a focus on developing new releases and worlds |
1,223 | |||
| 45 |
WatchGuard Technologieswatchguard.com
Provides unified cybersecurity solutions for managed service providers, offering network security, endpoint protection, multi-factor authentication, and secure Wi-Fi services. |
1,218 | |||
| 46 |
Consolidated Metcoconmet.com
A leading global manufacturer of components for the commercial vehicle industry, specializing in wheel ends, aluminum castings, and plastic components |
1,127 | |||
| 47 |
Janickijanicki.com
Designs high-precision parts, tooling, and prototypes for various industries Specializes in large, complex projects with advanced CNC machining capabilities and real-time project management solutions |
1,029 | |||
| 48 |
TerraPowerterrapower.com
A nuclear energy technology company focused on developing sustainable, low-carbon energy sources to accelerate global economic development and reduce poverty |
1,029 | |||
| 49 |
Keytronickeytronic.com
Value-added contract manufacturer for OEMs, specializing in PCB assembly, plastic molding, and full product assembly across diverse products, with manufacturing in Mexico and China. |
1,010 | |||
| 50 |
Bloodworks Northwestbloodworksnw.org
Nonprofit organization advancing transfusion medicine, patient care, and research in the Pacific Northwest through blood donations and tissue support |
926 | |||
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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 Nov 11, 2026.
More company lists in Washington State
- The largest companies in Washington State 2,143
- Multinational companies in Washington State 288
- Manufacturers in Washington State 176
- Education providers in Washington State 169
- Professional services firms in Washington State 163
- Retail chains in Washington State 161
- IT Services and IT Consulting companies in Washington State 160
- SaaS companies in Washington State 155
- Critical infrastructure operators in Washington State 149
- IT services companies in Washington State 145
- Software Development companies in Washington State 140
- Public sector organisations in Washington State 139
- Healthcare providers in Washington State 136
- Companies with a mobile app in Washington State 128
- Hardware manufacturers in Washington State 121
- AI companies in Washington State 110
- Hospitals and Health Care companies in Washington State 107
- Consulting firms in Washington State 106
- Financial services firms in Washington State 92
- Construction companies in Washington State 87
- Subscription businesses in Washington State 86
- Higher Education companies in Washington State 74
- Family-owned companies in Washington State 73
- E-commerce companies in Washington State 69
The same list elsewhere in United States
- Companies with in-house R&D in the United States 6,796
- Companies with in-house R&D in California 1,276
- Companies with in-house R&D in Texas 442
- Companies with in-house R&D in New York State 419
- Companies with in-house R&D in Massachusetts 396
- Companies with in-house R&D in Illinois 322
- Companies with in-house R&D in Michigan 287
- Companies with in-house R&D in Ohio 277
- Companies with in-house R&D in Pennsylvania 255
- Companies with in-house R&D in New Jersey 224
- Companies with in-house R&D in Florida 221
- Companies with in-house R&D in Alabama 214
- Companies with in-house R&D in Georgia 173
- Companies with in-house R&D in Virginia 166
- Companies with in-house R&D in North Carolina 158
- Companies with in-house R&D in Wisconsin 154
- Companies with in-house R&D in Minnesota 146
- Companies with in-house R&D in Colorado 113
- Companies with in-house R&D in Maryland 107
- Companies with in-house R&D in Indiana 104
- Companies with in-house R&D in New York 223
- Companies with in-house R&D in San Francisco 147
- Companies with in-house R&D in Houston 129
- Companies with in-house R&D in San Jose 103