# 30 leading subscription businesses in Washington

Tamtam tracks 63 subscription businesses headquartered in Washington. This list ranks the 30 largest by number of employees on LinkedIn, led by National Geographic, AARP and The Washington Post. Their median headcount is 1,111. Half of them were founded in 1949 or later.

The companies listed are primarily large non-profit organizations and publishing houses based in Washington. These include National Geographic, a multimedia destination for science and exploration, and AARP, a non-profit advocating for people aged 50-plus. The Washington Post is a news organization focused on reporting and analysis, while Blackboard delivers digital learning environments. Optica is a global organization promoting knowledge in optics and photonics.

A notable pattern among these entities is their long history; many were founded in the 19th or early 20th century. Examples include the American Society of Civil Engineers, established in 1852, and the American Chemical Society, founded in 1876. This suggests a concentration of well-established institutions in the area.

🇺🇸 Washington · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [National Geographic](https://www.tamtam.ai/c/national-geographic) (nationalgeographic.com)<br>A multimedia destination sharing stories in science, exploration, and adventure, dedicated to funding scientists, explorers, and conservationists for over 135 years | Book and Periodical Publishing | 🇺🇸 Washington | 9,247 |  |
| 2 | [AARP](https://www.tamtam.ai/c/aarp) (aarp.org)<br>A nonprofit organization disrupting stereotypes about aging, advocating for issues affecting people 50-plus, providing services and information for health, finance, and fulfillment | Non-profit Organizations | 🇺🇸 Washington | 6,616 | 1958 |
| 3 | [The Washington Post](https://www.tamtam.ai/c/the-washington-post) (washingtonpost.com)<br>A leading news organization focused on trustworthy reporting, in-depth analysis, and engaging opinions through a blend of journalism and technology | Newspaper Publishing | 🇺🇸 Washington | 3,473 | 1877 |
| 4 | [Optica](https://www.tamtam.ai/c/optica) (optica.org)<br>A global organization promoting knowledge in optics and photonics through publications, meetings, resources, and activities to accelerate scientific and educational achievements | Non-profit Organizations | 🇺🇸 Washington | 2,984 | 1916 |
| 5 | [American Chemical Society](https://www.tamtam.ai/c/american-chemical-society) (acs.org)<br>Professional organization supporting chemists worldwide through publications, conferences, education, research grants, and advocacy for chemistry's societal impact. | Non-profit Organizations | 🇺🇸 Washington | 2,797 | 1876 |
| 6 | [Blackboard](https://www.tamtam.ai/c/blackboard) (blackboard.com)<br>Delivers digital environment for teaching and learning through an AI-advanced LMS, accessibility tools, and institutional effectiveness solutions. | E-Learning Providers | 🇺🇸 Washington | 2,759 | 1997 |
| 7 | [American Society of Civil Engineers](https://www.tamtam.ai/c/american-society-of-civil-engineers) (asce.org)<br>Established in 1852, this organization represents over 150,000 members worldwide They provide conferences, education, publications, and set codes for civil engineering standards | Civil Engineering | 🇺🇸 Washington | 2,510 | 1852 |
| 8 | [ASM](https://www.tamtam.ai/c/asm-washington) (linktr.ee)<br>Advancing the microbial sciences through conferences, publications, certifications, and education while providing a global network for scientists | Non-profit Organizations | 🇺🇸 Washington | 1,917 | 1899 |
| 9 | [American College of Cardiology](https://www.tamtam.ai/c/american-college-of-cardiology) (acc.org)<br>The organization leads in cardiovascular care, education, research, and policy formation to improve heart health for all | Hospitals and Health Care | 🇺🇸 Washington | 1,896 | 1949 |
| 10 | [The American Institute of Architects (AIA)](https://www.tamtam.ai/c/the-american-institute-of-architects-aia) (aia.org)<br>An organization supporting architects and allied partners through advocacy, continuing education, contract documents, market research, conferences, awards, and promoting design excellence | Architecture and Planning | 🇺🇸 Washington | 1,757 | 1857 |
| 11 | [National Association of Home Builders](https://www.tamtam.ai/c/national-association-of-home-builders) (nahb.org)<br>NAHB advocates for housing opportunities, professional success for members, and access to safe, affordable housing for all Americans through industry representation and events | Construction | 🇺🇸 Washington | 1,643 | 1942 |
| 12 | [The Atlantic](https://www.tamtam.ai/c/the-atlantic) (theatlantic.com)<br>A reputable publication shaping the national debate on politics, business, foreign affairs, and cultural trends for over 150 years | Book and Periodical Publishing | 🇺🇸 Washington | 1,546 | 1857 |
| 13 | [Associated Builders and Contractors](https://www.tamtam.ai/c/associated-builders-and-contractors) (abc.org)<br>A national construction association supporting members in developing people, winning work, and delivering projects safely, ethically, and profitably for communities | Construction | 🇺🇸 Washington | 1,483 | 1950 |
| 14 | [Transport Topics](https://www.tamtam.ai/c/transport-topics) (ttnews.com)<br>Leading source of news and analysis on freight transportation, regulatory issues, industry events, business, and technology developments. | Newspaper Publishing | 🇺🇸 Washington | 1,445 | 1935 |
| 15 | [AAAS](https://www.tamtam.ai/c/aaas) (aaas.org)<br>Non-profit advancing science, engineering, and innovation globally. Publishes scientific journals like Science magazine, promotes understanding, and fosters scientific excellence, equity, and policy. | Non-profit Organizations | 🇺🇸 Washington | 1,111 | 1848 |
| 16 | [National Association of Social Workers](https://www.tamtam.ai/c/national-association-of-social-workers) (socialworkers.org)<br>Professional organization advocating for social workers, promoting their practice, and improving well-being of individuals, families, and communities through advocacy and support | Non-profit Organizations | 🇺🇸 Washington | 1,077 | 1955 |
| 17 | [Monumental Sports & Entertainment](https://www.tamtam.ai/c/monumental-sports-and-entertainment) (monumentalsports.com)<br>An integrated sports and entertainment company in Washington, DC with diverse partnerships, owning and operating professional sports teams, arenas, and training facilities | Spectator Sports | 🇺🇸 Washington | 1,037 |  |
| 18 | [PLASTICS (Plastics Industry Association)](https://www.tamtam.ai/c/plastics-plastics-industry-association) (plasticsindustry.org)<br>An organization representing the plastics supply chain and promoting global competitiveness, recycling, and environmental sustainability, while fostering technological innovations and economic opportunities | Non-profit Organizations | 🇺🇸 Washington | 963 | 1937 |
| 19 | [ENGIE Impact](https://www.tamtam.ai/c/engie-impact) (engieimpact.com)<br>Sustainability solutions provider for corporations, cities, and governments worldwide, offering strategic and technical support to tackle complex sustainability challenges Leader in zero-carbon transition | Environmental Services | 🇺🇸 Washington | 934 | 1996 |
| 20 | [Inside Higher Ed](https://www.tamtam.ai/c/inside-higher-ed) (insidehighered.com)<br>A reliable source of news, analysis, and services for the higher education community, offering essential tools and resources to professionals and organizations | Online Audio and Video Media | 🇺🇸 Washington | 886 | 2004 |
| 21 | [Biotechnology Innovation Organization](https://www.tamtam.ai/c/biotechnology-innovation-organization) (bio.org)<br>Provides advocacy, business development, and communication services for over 1,200 member organizations, championing biotechnology and supporting innovation in various sectors worldwide. | Biotechnology Research | 🇺🇸 Washington | 865 | 1993 |
| 22 | [The Chronicle of Higher Education](https://www.tamtam.ai/c/the-chronicle-of-higher-education) (chronicle.com)<br>Leading source for news, information, and jobs for college and university faculty members and administrators since 1966 | Newspaper Publishing | 🇺🇸 Washington | 854 | 1966 |
| 23 | [American Psychiatric Association](https://www.tamtam.ai/c/american-psychiatric-association) (psychiatry.org)<br>National medical society with over 39,200 physicians specializing in diagnosis, treatment, prevention, and research of mental illnesses and substance use disorders. | Non-profit Organizations | 🇺🇸 Washington | 840 | 1844 |
| 24 | [U.S. Green Building Council](https://www.tamtam.ai/c/u-s-green-building-council) (usgbc.org)<br>The company promotes sustainability through LEED, leading the way in green building and community development for a healthier, prosperous future | Non-profit Organizations | 🇺🇸 Washington | 713 | 1993 |
| 25 | [Fulbright Association](https://www.tamtam.ai/c/fulbright-association) (fulbright.org)<br>Promoting lifelong engagement for US alumni of the Fulbright Program through networking, service projects, advocacy for international education, and cultural events | Higher Education | 🇺🇸 Washington | 673 | 1977 |
| 26 | [Retail Industry Leaders Association (RILA)](https://www.tamtam.ai/c/retail-industry-leaders-association-rila) (rila.org)<br>A leading US trade association advocating for retailers, promoting operational excellence and innovation to transform the industry environment for success | Retail | 🇺🇸 Washington | 605 |  |
| 27 | [American College of Obstetricians and Gynecologists (ACOG)](https://www.tamtam.ai/c/american-college-of-obstetricians-and-gynecologists-acog) (acog.org)<br>A professional membership organization founded in 1951, dedicated to improving women's health through guidelines, educational materials, and board-certified ob-gyn members | Non-profit Organizations | 🇺🇸 Washington | 602 | 1951 |
| 28 | [National Association of Independent Schools](https://www.tamtam.ai/c/national-association-of-independent-schools) (nais.org)<br>This organization supports over 1,700 independent K-12 schools in the US and abroad, helping them fulfill their unique missions and serve students effectively | Education Administration Programs | 🇺🇸 Washington | 595 |  |
| 29 | [Foreign Policy](https://www.tamtam.ai/c/foreign-policy) (foreignpolicy.com)<br>This company is a global magazine that provides alternative viewpoints on American foreign policy and explores major world issues rigorously | Book and Periodical Publishing | 🇺🇸 Washington | 559 |  |
| 30 | [DIA](https://www.tamtam.ai/c/dia) (diaglobal.org)<br>A global nonprofit organization fostering collaborative innovation in the life sciences industry through knowledge resources, conferences, training courses, and strategic partnerships | Pharmaceutical Manufacturing | 🇺🇸 Washington | 555 | 1964 |

## 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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Source: https://www.tamtam.ai/l/subscription-businesses-washington