| # | Company | Employees |
|---|---|---|
| 1 |
Vox Mediacorp.voxmedia.com
A leading media company building top editorial brands and technology, shaping the future of media with podcasts, TV productions, and digital properties |
11,029 |
| 2 |
National Geographicnationalgeographic.com
A multimedia destination sharing stories in science, exploration, and adventure, dedicated to funding scientists, explorers, and conservationists for over 135 years |
9,247 |
| 3 | 6,616 | |
| 4 |
The Washington Postwashingtonpost.com
A leading news organization focused on trustworthy reporting, in-depth analysis, and engaging opinions through a blend of journalism and technology |
3,473 |
| 5 |
Opticaoptica.org
A global organization promoting knowledge in optics and photonics through publications, meetings, resources, and activities to accelerate scientific and educational achievements |
2,984 |
| 6 |
American Chemical Societyacs.org
Professional organization supporting chemists worldwide through publications, conferences, education, research grants, and advocacy for chemistry's societal impact. |
2,797 |
| 7 |
American Society of Civil Engineersasce.org
Established in 1852, this organization represents over 150,000 members worldwide They provide conferences, education, publications, and set codes for civil engineering standards |
2,510 |
| 8 | 1,917 | |
| 9 |
American College of Cardiologyacc.org
The organization leads in cardiovascular care, education, research, and policy formation to improve heart health for all |
1,896 |
| 10 |
Voice of Americainsidevoa.com
Provides international news, information, and educational content in over 40 languages via radio, TV, internet, mobile, and affiliates. |
1,782 |
| 11 |
The Atlantictheatlantic.com
A reputable publication shaping the national debate on politics, business, foreign affairs, and cultural trends for over 150 years |
1,546 |
| 12 |
Transport Topicsttnews.com
Leading source of news and analysis on freight transportation, regulatory issues, industry events, business, and technology developments. |
1,445 |
| 13 |
U.S. Government Publishing Officegpo.gov
Official production, distribution, and preservation of U.S. Government information products for all federal branches in digital and print formats. |
1,258 |
| 14 | 1,111 | |
| 15 |
AJ+ajplus.net
Innovative news media company operating internationally in English, Arabic, and Spanish, telling compelling stories with creative freedom |
1,070 |
| 16 |
Atlantic Councilatlanticcouncil.org
Educates, galvanizes, and promotes constructive leadership in international affairs, shaping policy choices and fostering strategies for global security and economic prosperity through various programs. |
1,039 |
| 17 |
Monumental Sports & Entertainmentmonumentalsports.com
An integrated sports and entertainment company in Washington, DC with diverse partnerships, owning and operating professional sports teams, arenas, and training facilities |
1,037 |
| 18 |
The National Academies of Sciences, Engineering, and Medicinenationalacademies.org
A nonprofit institution providing independent science, technology, and health policy advice through the National Academies of Sciences, Engineering and Medicine |
985 |
| 19 |
American Enterprise Instituteaei.org
A public policy think tank dedicated to defending human dignity, expanding human potential, and promoting freedom and opportunity worldwide |
967 |
| 20 |
The Brookings Institutionbrookings.edu
A renowned think tank conducting independent research, offering innovative policy solutions, and consistently ranked as the most influential and trusted globally |
907 |
| 21 |
Inside Higher Edinsidehighered.com
A reliable source of news, analysis, and services for the higher education community, offering essential tools and resources to professionals and organizations |
886 |
| 22 |
The Chronicle of Higher Educationchronicle.com
Leading source for news, information, and jobs for college and university faculty members and administrators since 1966 |
854 |
| 23 |
American Psychiatric Associationpsychiatry.org
National medical society with over 39,200 physicians specializing in diagnosis, treatment, prevention, and research of mental illnesses and substance use disorders. |
840 |
| 24 |
National Academy of Sciencesnasonline.org
An honorific society of distinguished scholars engaged in scientific research dedicated to advancing science and technology for the general welfare |
808 |
| 25 |
SB Nationsbnation.com
A sports network that creates team sites for modern fans, providing content that informs, surprises, and connects with millions of viewers globally |
764 |
| 26 |
Social Media Today, LLCsocialmediatoday.com
Online community and resource for professionals in marketing, social business, communication, customer experience, and digital strategy, focusing on social media best practices and trends |
706 |
| 27 |
Ghanaian American Journalgajreport.com
The Ghanaian American Journal tells captivating stories about the African or Ghanaian experience in America and hosts discussions on contemporary topics |
663 |
| 28 |
Foreign Policyforeignpolicy.com
This company is a global magazine that provides alternative viewpoints on American foreign policy and explores major world issues rigorously |
559 |
| 29 |
DIAdiaglobal.org
A global nonprofit organization fostering collaborative innovation in the life sciences industry through knowledge resources, conferences, training courses, and strategic partnerships |
555 |
| 30 |
U.S. News & World Reportusnews.com
A digital media company providing independent reporting and expert advice on education, health, money, travel, cars, news, and reviews to consumers and businesses |
554 |
| 31 |
Health & Wellnesswholesomealive.com
Promoting overall health and wellness by focusing on physical, social, spiritual, emotional, intellectual, environmental, and occupational well-being |
553 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Oct 24, 2026.
More company lists in Washington
- The largest companies in Washington 1,081
- Non-profit Organizations companies in Washington 143
- Government Administration companies in Washington 99
- Education providers in Washington 61
- Public sector organisations in Washington 51
- Financial Services companies in Washington 38
- SaaS companies in Washington 37
- Higher Education companies in Washington 35
- IT Services and IT Consulting companies in Washington 35
- Law Practice companies in Washington 34
- Critical infrastructure operators in Washington 32
- Business Consulting and Services companies in Washington 32
- Hospitals and Health Care companies in Washington 32
- Venture capital and private equity firms in Washington 32
- International Affairs companies in Washington 28
- Financial services firms in Washington 26