# 30 leading corporate groups and holding companies in New York

Tamtam tracks 152 corporate groups and holding companies headquartered in New York. This list ranks the 30 largest by number of employees on LinkedIn, led by National Basketball Association (NBA), WPP Media and Moody's Corporation. Their median headcount is 7,201.

The companies listed here are large corporate groups and holding companies based in New York. They operate across various sectors, with a notable concentration in media, advertising, and financial services.

Among them, the National Basketball Association (NBA) manages global basketball leagues, WPP Media is a global media collective, Moody's Corporation provides risk assessment, and Fox Corporation produces and distributes news and entertainment. A common pattern is the significant presence of global marketing and media groups, indicating New York's role as a hub for these industries.

🇺🇸 New York · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [National Basketball Association (NBA)](https://www.tamtam.ai/c/national-basketball-association-nba) (nba.com)<br>Global basketball leagues offering professional games, digital content, merchandise, social media engagement, and community programs promoting education and health. | Spectator Sports | 🇺🇸 New York | 29,069 |  |
| 2 | [WPP Media](https://www.tamtam.ai/c/wpp-media) (wppmedia.com)<br>Global media collective leveraging AI, platforms, people, and partners to create innovative solutions driving brand growth worldwide daily. | Advertising Services | 🇺🇸 New York | 28,457 |  |
| 3 | [Moody's Corporation](https://www.tamtam.ai/c/moody-s-corporation) (moodys.com)<br>Global risk assessment firm providing data, analytics, and insights to empower organizations in making informed decisions and managing business risks worldwide | Financial Services | 🇺🇸 New York | 15,249 |  |
| 4 | [Marsh](https://www.tamtam.ai/c/marsh) (marsh.com)<br>provides risk management, strategy consulting, and people advisory services to clients worldwide across multiple specialized business units | Professional Services | 🇺🇸 New York | 12,940 |  |
| 5 | [Fox Corporation](https://www.tamtam.ai/c/fox-corporation) (foxcorporation.com)<br>Production and distribution of news, sports, and entertainment content through multiple leading media brands and platforms, including streaming services. | Broadcast Media Production and Distribution | 🇺🇸 New York | 12,051 |  |
| 6 | [Stagwell](https://www.tamtam.ai/c/stagwell) (stagwellglobal.com)<br>A challenger holding company specializing in transforming marketing strategies and practices | Advertising Services | 🇺🇸 New York | 10,825 |  |
| 7 | [Wonder](https://www.tamtam.ai/c/wonder) (wonder.com)<br>Providing quick delivery of diverse restaurant options to customers worldwide, ensuring convenient access to high-quality food | Food and Beverage Services | 🇺🇸 New York | 10,306 | 2018 |
| 8 | [Sony Music Entertainment](https://www.tamtam.ai/c/sony-music-entertainment) (sonymusic.com)<br>Global music company supporting artists, innovating in entertainment and technology, producing influential recordings, and expanding creative boundaries worldwide. | Musicians | 🇺🇸 New York | 10,202 |  |
| 9 | [Equinox](https://www.tamtam.ai/c/equinox) (equinox.com)<br>Collection of luxury fitness clubs, cycling studios, and hotels offering personal training, group classes, spa services, and apparel for high performance individuals. | Wellness and Fitness Services | 🇺🇸 New York | 9,944 | 1991 |
| 10 | [Hearst Magazines](https://www.tamtam.ai/c/hearst-magazines) (hearst.com)<br>Diversified media company with global reach, publishing 25 US brands and numerous print editions and websites worldwide, reaching millions of readers | Media Production | 🇺🇸 New York | 9,918 |  |
| 11 | [Douglas Elliman Real Estate](https://www.tamtam.ai/c/douglas-elliman-real-estate) (elliman.com)<br>A leading residential brokerage company in the US, investing in property technology and providing real estate services in multiple states | Real Estate | 🇺🇸 New York | 9,575 | 1911 |
| 12 | [GroupM](https://www.tamtam.ai/c/groupm) (wppmedia.com)<br>A global media investment group shaping the future of advertising to be more effective, with expertise in data, entertainment, and investment solutions | Advertising Services | 🇺🇸 New York | 9,156 | 2003 |
| 13 | [Omnicom](https://www.tamtam.ai/c/omnicom-new-york) (omc.com)<br>Global marketing communications company offering integrated marketing services for 200+ brands worldwide, known for talent, creativity, and digital innovation | Advertising Services | 🇺🇸 New York | 8,062 |  |
| 14 | [Loews Corporation](https://www.tamtam.ai/c/loews-corporation) (loews.com)<br>Diversified company managing subsidiaries in insurance, pipelines, hotels, and packaging, providing strategic direction and corporate services to all. | Investment Management | 🇺🇸 New York | 8,020 |  |
| 15 | [Newmark](https://www.tamtam.ai/c/newmark) (nmrk.com)<br>Advisory and service provider for commercial real estate, serving institutional investors, corporations, owners, and occupiers worldwide with tailored solutions. | Real Estate | 🇺🇸 New York | 7,201 | 1929 |
| 16 | [Ziff Davis](https://www.tamtam.ai/c/ziff-davis) (ziffdavis.com)<br>Digital media and internet company with brands in technology, shopping, gaming, entertainment, health, connectivity, cybersecurity, and marketing technology. | Technology, Information and Media | 🇺🇸 New York | 6,688 |  |
| 17 | [STO Building Group](https://www.tamtam.ai/c/sto-building-group) (stobuildinggroup.com)<br>A family of top-tier builders who collaborate, innovate, and prioritize clients, offering a wide range of construction services with a focus on teamwork and empowerment | Construction | 🇺🇸 New York | 6,209 |  |
| 18 | [Warner Music Group](https://www.tamtam.ai/c/warner-music-group) (wmg.com)<br>A global entertainment company with a diverse portfolio including music labels, artists, songwriters, and a music publishing arm with extensive catalog | Entertainment Providers | 🇺🇸 New York | 6,102 |  |
| 19 | [Hearst](https://www.tamtam.ai/c/hearst) (hearst.com)<br>A diversified information, services, and media company with a global presence focused on informing audiences, improving lives, and leading with purpose and integrity | Media Production | 🇺🇸 New York | 6,095 | 1887 |
| 20 | [Viacom](https://www.tamtam.ai/c/viacom) (paramount.com)<br>Creation of global television, film, digital media, and live event experiences connecting diverse audiences through branded content and merchandise in many countries. | Entertainment Providers | 🇺🇸 New York | 6,047 |  |
| 21 | [Inizio](https://www.tamtam.ai/c/inizio) (inizio.com)<br>Providing tailored, innovative solutions for health and life sciences companies to optimize clinical development, commercialization, and maximize patient access. | Business Consulting and Services | 🇺🇸 New York | 5,706 |  |
| 22 | [Suntory Global Spirits](https://www.tamtam.ai/c/suntory-global-spirits) (suntoryglobalspirits.com)<br>Producer of premium whiskies, tequilas, gins, and ready-to-drink cocktails with global presence and strong sustainability commitments. | Beverage Manufacturing | 🇺🇸 New York | 5,577 |  |
| 23 | [Internova Travel Group](https://www.tamtam.ai/c/internova-travel-group) (internova.com)<br>A global travel services company with leading brands providing personalized expertise to leisure and corporate clients through a network of travel advisors worldwide | Hospitality | 🇺🇸 New York | 5,500 | 2008 |
| 24 | [AmTrust Financial Services, Inc.](https://www.tamtam.ai/c/amtrust-financial-services-inc) (amtrustfinancial.com)<br>Multinational insurance company specializing in workers’ compensation, small commercial, specialty risk, extended warranty, and middle-market property casualty insurance. | Insurance | 🇺🇸 New York | 4,973 | 1998 |
| 25 | [Diamond Baseball Holdings](https://www.tamtam.ai/c/diamond-baseball-holdings) (diamondbaseballholdings.com)<br>Founded in 2021, this company elevates fan experiences, creates dynamic brand engagements, and highlights the evolution of Minor League Baseball | Spectator Sports | 🇺🇸 New York | 4,419 |  |
| 26 | [Moody's Ratings](https://www.tamtam.ai/c/moody-s-ratings) (moodys.com)<br>Provider of credit ratings, research, and risk analysis covering sovereign nations, corporate issuers, financial institutions, and structured finance globally. | Financial Services | 🇺🇸 New York | 4,388 |  |
| 27 | [HarperCollins Publishers](https://www.tamtam.ai/c/harpercollins-publishers) (harpercollins.com)<br>Global publisher producing thousands of annual titles across many languages and genres, managing extensive print and digital catalogs for award-winning international authors. | Book and Periodical Publishing | 🇺🇸 New York | 4,377 | 1817 |
| 28 | [Fox News Media](https://www.tamtam.ai/c/fox-news-media) (foxnews.com)<br>Leading American news organization operating TV channels, digital platforms, audio services, and streaming services with a strong focus on cable news and business news | Broadcast Media Production and Distribution | 🇺🇸 New York | 3,365 |  |
| 29 | [Fareportal](https://www.tamtam.ai/c/fareportal) (fareportal.com)<br>Global travel technology company creating cutting-edge solutions for vacation seekers worldwide, with headquarters in NY and offices in multiple countries | Technology, Information and Internet | 🇺🇸 New York | 3,112 | 2002 |
| 30 | [Discovery Inc](https://www.tamtam.ai/c/discovery-inc) (careers.wbd.com)<br>A media company focused on entertainment and information, evolving under the new name Warner Bros Discovery to bring more captivating content | Entertainment Providers | 🇺🇸 New York | 3,041 |  |

## 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 12, 2026.

## More company lists in New York

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## The same list elsewhere in United States

- [Corporate groups and holding companies in the United States](https://www.tamtam.ai/l/holding-companies-united-states) (2,829)
- [Corporate groups and holding companies in California](https://www.tamtam.ai/l/holding-companies-california) (270)
- [Corporate groups and holding companies in New York State](https://www.tamtam.ai/l/holding-companies-new-york-state) (245)
- [Corporate groups and holding companies in Texas](https://www.tamtam.ai/l/holding-companies-texas) (238)
- [Corporate groups and holding companies in Florida](https://www.tamtam.ai/l/holding-companies-florida) (182)
- [Corporate groups and holding companies in Illinois](https://www.tamtam.ai/l/holding-companies-illinois) (154)
- [Corporate groups and holding companies in Pennsylvania](https://www.tamtam.ai/l/holding-companies-pennsylvania) (120)
- [Corporate groups and holding companies in Ohio](https://www.tamtam.ai/l/holding-companies-ohio) (104)
- [Corporate groups and holding companies in Georgia](https://www.tamtam.ai/l/holding-companies-georgia) (90)
- [Corporate groups and holding companies in Michigan](https://www.tamtam.ai/l/holding-companies-michigan) (90)
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## The same list elsewhere

- [Corporate groups and holding companies in the world](https://www.tamtam.ai/l/holding-companies-in-the-world) (12,864)
- [Corporate groups and holding companies in North America](https://www.tamtam.ai/l/holding-companies-in-north-america) (3,311)

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Source: https://www.tamtam.ai/l/holding-companies-new-york