# The 50 largest companies with in-house R&D in Washington State

Tamtam tracks 140 companies with in-house R&D headquartered in Washington State. This list ranks the 50 largest by number of employees on LinkedIn, led by Amazon, Microsoft and Amazon Web Services (AWS). Their median headcount is 3,352. Half of them were founded in 1980 or later. The most common headquarters are Seattle (19), Bellevue (11) and Redmond (4).

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.

🇺🇸 Washington State · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Amazon](https://www.tamtam.ai/c/amazon) (amazon.com)<br>An e-commerce giant offering a vast selection of products, convenient shopping experiences, and fast delivery, connecting buyers with a wide range of sellers | Software Development | 🇺🇸 Seattle | 1,541,000 |  |
| 2 | [Microsoft](https://www.tamtam.ai/c/microsoft) (microsoft.com)<br>Develops and sells software, hardware, and cloud services, including the Windows operating system and Office suite, to improve productivity and digital experiences | Software Development | 🇺🇸 Redmond | 233,562 |  |
| 3 | [Amazon Web Services (AWS)](https://www.tamtam.ai/c/amazon-web-services-aws) (amazon.com)<br>A global cloud computing provider offering scalable, reliable, and cost-effective infrastructure services to businesses worldwide, eliminating the need for capital infrastructure expenses | IT Services and IT Consulting | 🇺🇸 Seattle | 147,090 | 2006 |
| 4 | [T-Mobile](https://www.tamtam.ai/c/t-mobile) (careers.t-mobile.com)<br>Leading US wireless provider delivering advanced 4G LTE and nationwide 5G networks, prioritizing customer value, service excellence, and innovation in Bellevue, Washington | Telecommunications | 🇺🇸 Bellevue | 96,232 |  |
| 5 | [University of Washington](https://www.tamtam.ai/c/university-of-washington) (washington.edu)<br>Public research university offering diverse educational programs, extensive campuses, cultural activities, and high-quality medical care, engaging with communities. | Higher Education | 🇺🇸 Seattle | 32,106 |  |
| 6 | [Expedia Group](https://www.tamtam.ai/c/expedia-group) (careers.expediagroup.com)<br>A tech company in the travel industry creating unforgettable experiences, empowering travelers worldwide, and committed to inclusivity and accessibility | Software Development | 🇺🇸 Seattle | 21,829 |  |
| 7 | [PACCAR](https://www.tamtam.ai/c/paccar) (paccar.com)<br>Global leader in designing, manufacturing, and supporting premium trucks, diesel engines, and financial services, with a focus on environmental responsibility and innovation | Motor Vehicle Manufacturing | 🇺🇸 Bellevue | 19,393 | 1905 |
| 8 | [Blue Origin](https://www.tamtam.ai/c/blue-origin) (blueorigin.com)<br>Building affordable access to space and utilizing its resources to benefit Earth Developing reusable rocket engines, launch vehicles, in-space systems, and lunar landers | Aviation and Aerospace Component Manufacturing | 🇺🇸 Kent | 12,048 | 2000 |
| 9 | [Washington State University](https://www.tamtam.ai/c/washington-state-university) (wsu.edu)<br>Statewide land-grant university offering research, education, and extension services in agriculture, health, engineering, business, and more across multiple campuses. | Higher Education | 🇺🇸 Pullman/Spokane/Tri-Cities/Vancouver/Everett/Global | 11,522 | 1890 |
| 10 | [Seattle Children's](https://www.tamtam.ai/c/seattle-children-s) (seattlechildrens.org)<br>Providing compassionate pediatric care, conducting breakthrough research, and supporting families to ensure children receive hope, care, and cures. | Hospitals and Health Care | 🇺🇸 Seattle | 8,756 | 1907 |
| 11 | [Fortive](https://www.tamtam.ai/c/fortive) (fortive.com)<br>A diverse team of innovators leveraging essential technology to drive global progress in industrial, environmental, healthcare, and safety solutions | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Everett | 8,485 |  |
| 12 | [Nintendo](https://www.tamtam.ai/c/nintendo) (nintendo.com)<br>This company creates video games and entertainment to bring joy to people worldwide, building on a legacy of innovation and fun | Computer Games | 🇺🇸 Redmond | 7,706 | 1980 |
| 13 | [Veeam Software](https://www.tamtam.ai/c/veeam-software) (veeam.com)<br>Provides data backup, recovery, security, and intelligence solutions ensuring business continuity and data availability across hybrid cloud environments worldwide. | Software Development | 🇺🇸 Seattle | 7,308 | 2006 |
| 14 | [Schweitzer Engineering Laboratories (SEL)](https://www.tamtam.ai/c/schweitzer-engineering-laboratories-sel) (selinc.com)<br>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 | Utilities | 🇺🇸 Pullman | 7,267 | 1982 |
| 15 | [Microsoft AI](https://www.tamtam.ai/c/microsoft-ai) (microsoft.ai)<br>The company is a global community dedicated to sharing, discussing, and advancing artificial intelligence research, projects, and skills for all levels | Software Development | 🇺🇸 Redmond | 7,259 | 2024 |
| 16 | [SAP Concur](https://www.tamtam.ai/c/sap-concur) (concur.com)<br>Offers integrated solutions for travel, expense, and invoice management, automating everyday processes and providing insights into spending, compliance, and budget blind spots. | Software Development | 🇺🇸 Bellevue | 6,588 |  |
| 17 | [Pacific Northwest National Laboratory](https://www.tamtam.ai/c/pacific-northwest-national-laboratory) (pnnl.gov)<br>Research in chemistry, Earth sciences, biology, and data science to enhance energy resiliency and support national security efforts. | Research Services | 🇺🇸 Richland | 6,257 | 1965 |
| 18 | [F5](https://www.tamtam.ai/c/f5) (f5.com)<br>It provides multi-cloud application services and security, optimizing and securing apps and APIs for organizations to enhance digital experiences. | IT Services and IT Consulting | 🇺🇸 Seattle | 6,192 |  |
| 19 | [Fred Hutch](https://www.tamtam.ai/c/fred-hutch) (fredhutch.org)<br>Nonprofit organization specializing in cancer research and treatment, collaborating with UW Medicine to provide comprehensive cancer care services. | Hospitals and Health Care | 🇺🇸 Seattle | 6,180 | 1975 |
| 20 | [Itron, Inc.](https://www.tamtam.ai/c/itron-inc) (na.itron.com)<br>This company enables utilities and cities worldwide to deliver critical infrastructure services through smart networks, software, meters, and sensors for energy and water management | Utilities | 🇺🇸 Liberty Lake | 5,820 | 1977 |
| 21 | [Milliman](https://www.tamtam.ai/c/milliman) (id.milliman.com)<br>Independent consulting firm providing actuarial services, employee benefits, healthcare, investment, life insurance, and financial services to business, government, union, and nonprofit organizations worldwide. | Business Consulting and Services | 🇺🇸 Seattle | 4,474 | 1947 |
| 22 | [ZoomInfo](https://www.tamtam.ai/c/zoominfo) (zoominfo.com)<br>Provides go-to-market platform, accurate data, insights, and technology for businesses to find, acquire, and grow customers efficiently, aligning sales and marketing. | Software Development | 🇺🇸 Vancouver | 4,211 |  |
| 23 | [Smartsheet](https://www.tamtam.ai/c/smartsheet) (smartsheet.com)<br>Enterprise work management platform enabling organizations to move faster, drive innovation, and achieve more through process automation and collaboration tools | Software Development | 🇺🇸 Bellevue | 4,015 | 2005 |
| 24 | [PATH](https://www.tamtam.ai/c/path-seattle) (path.org)<br>Global nonprofit dedicated to health equity, developing and scaling up innovative solutions to pressing health challenges through partnerships and expertise | International Affairs | 🇺🇸 Seattle | 3,515 | 1977 |
| 25 | [Centific](https://www.tamtam.ai/c/centific) (centific.com)<br>Engineering platforms and curating multilingual data for enterprise clients while providing pre-trained datasets, fine-tuned LLMs, and RAG pipelines for faster AI deployment. | Software Development | 🇺🇸 Redmond | 3,352 |  |
| 26 | [Fluke Corporation](https://www.tamtam.ai/c/fluke-corporation) (fluke.com)<br>Manufacturer and distributor of electronic test tools and software, providing essential technology for safer, smarter industrial and electrical applications. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Everett | 3,317 | 1948 |
| 27 | [Kenworth Truck Co.](https://www.tamtam.ai/c/kenworth-truck-co) (kenworth.com)<br>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 | Truck Transportation | 🇺🇸 Kirkland | 3,075 |  |
| 28 | [Proprio](https://www.tamtam.ai/c/proprio-seattle) (proprio.ai)<br>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. | Medical Equipment Manufacturing | 🇺🇸 Seattle | 2,129 | 2016 |
| 29 | [AGC Biologics](https://www.tamtam.ai/c/agc-biologics) (agcbio.com)<br>Provides world-class development and manufacturing of therapeutic proteins, plasmid DNA, messenger RNA, viral vectors, and genetically engineered cell therapies globally. | Pharmaceutical Manufacturing | 🇺🇸 Bothell | 2,525 |  |
| 30 | [Icertis](https://www.tamtam.ai/c/icertis) (icertis.com)<br>It provides AI-powered contract management solutions, helping businesses gain insights, automate processes, control costs, and ensure compliance globally. | Software Development | 🇺🇸 Bellevue | 2,414 | 2009 |
| 31 | [Crane Aerospace & Electronics](https://www.tamtam.ai/c/crane-aerospace-and-electronics) (craneae.com)<br>Supplies critical systems and components to aerospace and defense markets. Offerings include cabin, fluid, landing, microelectronics, microwave, power, sensing, and utility systems. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Lynnwood | 2,077 | 1904 |
| 32 | [Hoya](https://www.tamtam.ai/c/hoya) (hoya.co.jp)<br>A global enterprise specializing in advanced optics technologies, offering products and services in information technologies, eye care, medical, and imaging systems | Medical Equipment Manufacturing | 🇺🇸 Tacoma | 1,932 | 1941 |
| 33 | [Anker Innovations](https://www.tamtam.ai/c/anker-innovations) (anker-in.com)<br>Consumer electronics company founded in 2011, specializing in fast charging products, audio/video electronics, home appliances, and smart security solutions | Computers and Electronics Manufacturing | 🇺🇸 Bellevue | 1,865 | 2011 |
| 34 | [University of Washington - School of Medicine](https://www.tamtam.ai/c/university-of-washington-school-of-medicine) (uwmedicine.org)<br>A medical school focused on training primary-care physicians and advancing medical knowledge through research in the WWAMI region | Higher Education | 🇺🇸 Seattle | 1,788 | 1946 |
| 35 | [Wizards of the Coast](https://www.tamtam.ai/c/wizards-of-the-coast) (company.wizards.com)<br>Develops global gaming communities through trading card games, roleplaying experiences, digital play, board games, novels, movies, and diverse entertainment merchandise across multiple brands. | Entertainment Providers | 🇺🇸 Bellevue | 1,788 |  |
| 36 | [Tableau](https://www.tamtam.ai/c/tableau) (tableau.com)<br>Provides software tools enabling users to visualize, analyze, and interpret data for better decision-making and actionable insights. | Software Development | 🇺🇸 Seattle | 1,788 | 2003 |
| 37 | [Valve corporation](https://www.tamtam.ai/c/valve-corporation) (valvesoftware.com)<br>Develops entertainment software, game engine, and a leading digital content platform. Also creates cutting-edge VR products and hardware devices for gaming. | Computer Games | 🇺🇸 Bellevue | 1,843 | 1996 |
| 38 | [Brooks Running](https://www.tamtam.ai/c/brooks-running) (brooksrunning.com)<br>Designing and engineering running shoes and gear focused on inclusivity, performance, and community, driven by a strong company culture. | Retail | 🇺🇸 Seattle | 1,745 | 1914 |
| 39 | [NCSOFT West](https://www.tamtam.ai/c/ncsoft-west) (ncsoft.com)<br>A global publisher of popular online and mobile games, dedicated to bringing entertainment and happiness to millions of players worldwide | Computer Games | 🇺🇸 Bellevue | 1,739 |  |
| 40 | [Outreach](https://www.tamtam.ai/c/outreach) (outreach.ai)<br>It provides a comprehensive sales execution platform that enhances efficiency in prospecting, deal management, and forecasting for revenue teams. | Software Development | 🇺🇸 Seattle | 1,579 | 2014 |
| 41 | [Allen Institute](https://www.tamtam.ai/c/allen-institute) (alleninstitute.org)<br>An open science organization focused on advancing bioscience to improve human health through foundational research, developing standards, and fostering new ideas | Research Services | 🇺🇸 Seattle | 1,452 | 2003 |
| 42 | [Pyrotek](https://www.tamtam.ai/c/pyrotek) (pyrotek.com)<br>Global engineering leader providing performance-improving technical solutions for industries like aluminium, glass, and automotive with a focus on innovation and customer satisfaction | Engineering Services | 🇺🇸 Spokane | 1,314 | 1956 |
| 43 | [Amazon Game Studios](https://www.tamtam.ai/c/amazon-game-studios) (amazon.jobs)<br>Amazon Games is a player-obsessed gaming company creating original IP and high-ambition games across platforms, fostering creativity and innovation | Entertainment Providers | 🇺🇸 Seattle | 1,277 |  |
| 44 | [Bungie](https://www.tamtam.ai/c/bungie) (careers.bungie.com)<br>This company creates popular gaming franchises that inspire player communities and friendships, with a focus on developing new releases and worlds | Entertainment Providers | 🇺🇸 Bellevue | 1,223 | 1991 |
| 45 | [WatchGuard Technologies](https://www.tamtam.ai/c/watchguard-technologies) (watchguard.com)<br>Provides unified cybersecurity solutions for managed service providers, offering network security, endpoint protection, multi-factor authentication, and secure Wi-Fi services. | Computer and Network Security | 🇺🇸 Seattle | 1,218 | 1996 |
| 46 | [Consolidated Metco](https://www.tamtam.ai/c/consolidated-metco) (conmet.com)<br>A leading global manufacturer of components for the commercial vehicle industry, specializing in wheel ends, aluminum castings, and plastic components | Truck Transportation | 🇺🇸 Vancouver | 1,127 | 1964 |
| 47 | [Janicki](https://www.tamtam.ai/c/janicki) (janicki.com)<br>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 | Aviation and Aerospace Component Manufacturing | 🇺🇸 Sedro-Woolley | 1,029 | 1993 |
| 48 | [TerraPower](https://www.tamtam.ai/c/terrapower) (terrapower.com)<br>A nuclear energy technology company focused on developing sustainable, low-carbon energy sources to accelerate global economic development and reduce poverty | Nuclear Electric Power Generation | 🇺🇸 Bellevue | 1,029 |  |
| 49 | [Keytronic](https://www.tamtam.ai/c/keytronic) (keytronic.com)<br>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. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Spokane Valley | 1,010 | 1969 |
| 50 | [Bloodworks Northwest](https://www.tamtam.ai/c/bloodworks-northwest) (bloodworksnw.org)<br>Nonprofit organization advancing transfusion medicine, patient care, and research in the Pacific Northwest through blood donations and tissue support | Hospitals and Health Care | 🇺🇸 Seattle | 926 | 1944 |

## 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

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Source: https://www.tamtam.ai/l/r-and-d-companies-washington-state