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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).

馃嚭馃嚫 Washington State50 companiesUpdated Nov 11, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
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

Software Development 馃嚭馃嚫 Seattle 1,541,000 n/a
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

Software Development 馃嚭馃嚫 Redmond 233,562 n/a
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

IT Services and IT Consulting 馃嚭馃嚫 Seattle 147,090 2006
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

Telecommunications 馃嚭馃嚫 Bellevue 96,232 n/a
5
University of Washingtonwashington.edu

Public research university offering diverse educational programs, extensive campuses, cultural activities, and high-quality medical care, engaging with communities.

Higher Education 馃嚭馃嚫 Seattle 32,106 n/a
6
Expedia Groupcareers.expediagroup.com

A tech company in the travel industry creating unforgettable experiences, empowering travelers worldwide, and committed to inclusivity and accessibility

Software Development 馃嚭馃嚫 Seattle 21,829 n/a
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

Motor Vehicle Manufacturing 馃嚭馃嚫 Bellevue 19,393 1905
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

Aviation and Aerospace Component Manufacturing 馃嚭馃嚫 Kent 12,048 2000
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.

Higher Education 馃嚭馃嚫 Pullman/Spokane/Tri-Cities/Vancouver/Everett/Global 11,522 1890
10
Seattle Children'sseattlechildrens.org

Providing compassionate pediatric care, conducting breakthrough research, and supporting families to ensure children receive hope, care, and cures.

Hospitals and Health Care 馃嚭馃嚫 Seattle 8,756 1907
11
Fortivefortive.com

A diverse team of innovators leveraging essential technology to drive global progress in industrial, environmental, healthcare, and safety solutions

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Everett 8,485 n/a
12
Nintendonintendo.com

This company creates video games and entertainment to bring joy to people worldwide, building on a legacy of innovation and fun

Computer Games 馃嚭馃嚫 Redmond 7,706 1980
13
Veeam Softwareveeam.com

Provides data backup, recovery, security, and intelligence solutions ensuring business continuity and data availability across hybrid cloud environments worldwide.

Software Development 馃嚭馃嚫 Seattle 7,308 2006
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

Utilities 馃嚭馃嚫 Pullman 7,267 1982
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

Software Development 馃嚭馃嚫 Redmond 7,259 2024
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.

Software Development 馃嚭馃嚫 Bellevue 6,588 n/a
17
Pacific Northwest National Laboratorypnnl.gov

Research in chemistry, Earth sciences, biology, and data science to enhance energy resiliency and support national security efforts.

Research Services 馃嚭馃嚫 Richland 6,257 1965
18
F5f5.com

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 馃嚭馃嚫 Seattle 6,192 n/a
19
Fred Hutchfredhutch.org

Nonprofit organization specializing in cancer research and treatment, collaborating with UW Medicine to provide comprehensive cancer care services.

Hospitals and Health Care 馃嚭馃嚫 Seattle 6,180 1975
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

Utilities 馃嚭馃嚫 Liberty Lake 5,820 1977
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.

Business Consulting and Services 馃嚭馃嚫 Seattle 4,474 1947
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.

Software Development 馃嚭馃嚫 Vancouver 4,211 n/a
23
Smartsheetsmartsheet.com

Enterprise work management platform enabling organizations to move faster, drive innovation, and achieve more through process automation and collaboration tools

Software Development 馃嚭馃嚫 Bellevue 4,015 2005
24
PATHpath.org

Global nonprofit dedicated to health equity, developing and scaling up innovative solutions to pressing health challenges through partnerships and expertise

International Affairs 馃嚭馃嚫 Seattle 3,515 1977
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.

Software Development 馃嚭馃嚫 Redmond 3,352 n/a

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26
Fluke Corporationfluke.com

Manufacturer and distributor of electronic test tools and software, providing essential technology for safer, smarter industrial and electrical applications.

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Everett 3,317 1948
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

Truck Transportation 馃嚭馃嚫 Kirkland 3,075 n/a
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.

Medical Equipment Manufacturing 馃嚭馃嚫 Seattle 2,129 2016
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.

Pharmaceutical Manufacturing 馃嚭馃嚫 Bothell 2,525 n/a
30
Icertisicertis.com

It provides AI-powered contract management solutions, helping businesses gain insights, automate processes, control costs, and ensure compliance globally.

Software Development 馃嚭馃嚫 Bellevue 2,414 2009
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.

Aviation and Aerospace Component Manufacturing 馃嚭馃嚫 Lynnwood 2,077 1904
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

Medical Equipment Manufacturing 馃嚭馃嚫 Tacoma 1,932 1941
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

Computers and Electronics Manufacturing 馃嚭馃嚫 Bellevue 1,865 2011
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

Higher Education 馃嚭馃嚫 Seattle 1,788 1946
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.

Entertainment Providers 馃嚭馃嚫 Bellevue 1,788 n/a
36
Tableautableau.com

Provides software tools enabling users to visualize, analyze, and interpret data for better decision-making and actionable insights.

Software Development 馃嚭馃嚫 Seattle 1,788 2003
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.

Computer Games 馃嚭馃嚫 Bellevue 1,843 1996
38
Brooks Runningbrooksrunning.com

Designing and engineering running shoes and gear focused on inclusivity, performance, and community, driven by a strong company culture.

Retail 馃嚭馃嚫 Seattle 1,745 1914
39
NCSOFT Westncsoft.com

A global publisher of popular online and mobile games, dedicated to bringing entertainment and happiness to millions of players worldwide

Computer Games 馃嚭馃嚫 Bellevue 1,739 n/a
40
Outreachoutreach.ai

It provides a comprehensive sales execution platform that enhances efficiency in prospecting, deal management, and forecasting for revenue teams.

Software Development 馃嚭馃嚫 Seattle 1,579 2014
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

Research Services 馃嚭馃嚫 Seattle 1,452 2003
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

Engineering Services 馃嚭馃嚫 Spokane 1,314 1956
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

Entertainment Providers 馃嚭馃嚫 Seattle 1,277 n/a
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

Entertainment Providers 馃嚭馃嚫 Bellevue 1,223 1991
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.

Computer and Network Security 馃嚭馃嚫 Seattle 1,218 1996
46
Consolidated Metcoconmet.com

A leading global manufacturer of components for the commercial vehicle industry, specializing in wheel ends, aluminum castings, and plastic components

Truck Transportation 馃嚭馃嚫 Vancouver 1,127 1964
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

Aviation and Aerospace Component Manufacturing 馃嚭馃嚫 Sedro-Woolley 1,029 1993
48
TerraPowerterrapower.com

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 馃嚭馃嚫 Bellevue 1,029 n/a
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.

Appliances, Electrical, and Electronics Manufacturing 馃嚭馃嚫 Spokane Valley 1,010 1969
50
Bloodworks Northwestbloodworksnw.org

Nonprofit organization advancing transfusion medicine, patient care, and research in the Pacific Northwest through blood donations and tissue support

Hospitals and Health Care 馃嚭馃嚫 Seattle 926 1944

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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.

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