Where is Omnicom Group headquartered?
In New York, United States.
Shell plc is a multinational energy company headquartered in London, United Kingdom. Founded in 1907, it operates one of the world’s most complex and far-reaching corporate structures, with 6,094 subsidiaries worldwide. This ownership data is part of CompanyData.com’s verified corporate hierarchy database, covering over 380 million companies worldwide.
Shell has 6,094 subsidiaries in 107 countries, with 1,457 in the United Kingdom (23.9%), 1,387 in the United States (22.8%), and 494 in Canada (8.1%). Together, these three countries account for more than half of Shell’s global network and reflect its integrated operations across oil and gas exploration, refining, trading, and energy transition activities.
List of Shell subsidiaries
Company Hierarchy
| Company | Location | Founded | Employees | Revenue (USD) | Legal Type | CEO | Website | Category Code | Category Description | # in Group | Local HQ Name | Local HQ City | Local HQ Country | National HQ Name | National HQ City | Global HQ Name | Global HQ City | Global HQ Country | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Omnicom Group INC.Omnicom Group INC.Global Headquarter | New York City, USA | 1944 | 120,000 | $17.3B | Corporation | John D Wren | omnicomgroup.com | 7311 | Advertising Agencies | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Omnicom Group INCOmnicom Group INCNational HQ | Singapore, Singapore | 120 | 7311 | Advertising Agencies | 2314 | Omnicom Group Inc. | NEW YORK | United States of America | OMNICOM GROUP INC | SINGAPORE | Omnicom Group Inc. | NEW YORK | United States of America | |||||||
Harrshrif Holdings INCHarrshrif Holdings INCLocal HQ | New York City, USA | 2007 | 40 | $2.5M | Corporation | Lara Shriftman | hs-pr.com | 8743 | Public Relations Services | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Harrshrif Holdings INCHarrshrif Holdings INC | Miami Beach, USA | 7 | Vanessa Poskanzer | hs-pr.com | 8743 | Public Relations Services | 2324 | Harrshrif Holdings Inc | New York | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||
Gsdm LLCGsdm LLCLocal HQ | Austin, USA | 1971 | 515 | $23.4M | Corporation | Lee Newman | gsdm.com | 7311 | Advertising Agencies | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
GSD&M Idea City LLCGSD&M Idea City LLC | Chicago, USA | 256 | Betty Pat | gsdm.com | 7311 | Advertising Agencies | 2324 | Gsdm LLC | AUSTIN | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||
Dieste INC.Dieste INC.Local HQ | Dallas, USA | 1995 | 185 | $12.0M | Corporation | Tony Dieste | dieste.com | 7311 | Advertising Agencies | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Dieste INC.Dieste INC. | San Francisco, USA | 10 | Kruger Karla | dieste.com | 7311 | Advertising Agencies | 2324 | Dieste Inc. | Dallas | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||
Dieste INC.Dieste INC. | New York City, USA | 45 | Giovanni Chiappardi | 7311 | Advertising Agencies | 2324 | Dieste Inc. | Dallas | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||||||
SpotplusSpotplus | Dallas, USA | 1995 | 6 | $668K | Corporation | Judy Miller | omnicomgroup.com | 7311 | Advertising Agencies | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Tracy-Locke, INC.Tracy-Locke, INC.Local HQ | Irving, USA | 1989 | 189 | $8.5M | Corporation | Hugh Boyle | tracylocke.com | 7311 | Advertising Agencies | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Tracy-Locke, INC.Tracy-Locke, INC. | Dallas, USA | 1 | traceylocke.com | 7311 | Advertising Agencies | 2324 | Tracy-Locke, Inc. | Irving | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||||||
Tracy-Locke, INC.Tracy-Locke, INC. | New York City, USA | 1 | Tracy Locke | 7311 | Advertising Agencies | 2324 | Tracy-Locke, Inc. | Irving | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||||||
The Marketing Arm INCThe Marketing Arm INCLocal HQ | Dallas, USA | 1999 | 255 | $24.5M | Corporation | Ray Clark | wearetma.agency | 8742 | Management Consulting Services | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
The Marketing Arm INCThe Marketing Arm INC | New York City, USA | 15 | 8742 | Management Consulting Services | 2324 | The Marketing Arm Inc | DALLAS | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||||
The Marketing Arm INCThe Marketing Arm INC | Chicago, USA | 15 | wearetma.agency | 8742 | Management Consulting Services | 2324 | The Marketing Arm Inc | DALLAS | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||||||
The Marketing Arm INCThe Marketing Arm INC | Marina del Rey, USA | 15 | 8742 | Management Consulting Services | 2324 | The Marketing Arm Inc | DALLAS | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||||
Davie Brown Entertainment, INC.Davie Brown Entertainment, INC. | Los Angeles, USA | 2007 | 88 | $456K | Corporation | James Davie | 7922 | Theatrical Producers (Except Motion Picture) and Miscellaneous Theatrical Services | 2324 | The Marketing Arm Inc | DALLAS | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||
The Marketing Arm INCThe Marketing Arm INC | Los Angeles, USA | 15 | Julie Patterson | themarketingarm.com | 8732 | Commercial Economic, Sociological, and Educational Research | 2324 | The Marketing Arm Inc | DALLAS | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||
Critical Mass (U.S.) INC.Critical Mass (U.S.) INC.Local HQ | Chicago, USA | 1999 | 320 | $29.3M | Corporation | Dianne Wilkins | criticalmass.com | 8742 | Management Consulting Services | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Critical Mass (U.S.) INC.Critical Mass (U.S.) INC. | New York City, USA | 78 | Dianne Wilkins | criticalmass.com | 7311 | Advertising Agencies | 2324 | Critical Mass (u.s.) Inc. | Chicago | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||
Critical Mass (U.S.) INC.Critical Mass (U.S.) INC. | New York City, USA | 5 | Harris Damashek | criticalmass.com | 8742 | Management Consulting Services | 2324 | Critical Mass (u.s.) Inc. | Chicago | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | |||||
Zocalo Group, LLCZocalo Group, LLC | Chicago, USA | 2007 | 117 | $1.1M | Corporation | Paul Rand | zocalogroup.com | 7313 | Radio, Television, and Publishers' Advertising Representatives | 2324 | Critical Mass (u.s.) Inc. | Chicago | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Das Holdings, INC.Das Holdings, INC.Local HQ | New York City, USA | 1999 | 482 | $473.2M | Corporation | Dale A Adams | dasglobal.com | 7311 | Advertising Agencies | 2324 | Omnicom Group Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Martec Ci Group, INC.Martec Ci Group, INC. | Dania Beach, USA | 1997 | 11 | $428K | Corporation | Gary Stockman | porternovelli.com | 8743 | Public Relations Services | 2324 | Das Holdings, Inc. | NEW YORK | United States of America | Omnicom Group Inc. | NEW YORK | Omnicom Group Inc. | NEW YORK | United States of America | ||
Get 1,000 subsidiaries free
Omnicom Group’s corporate network is part of a global collection of more than 41 million corporate hierarchies mapped in our company ownership database. It shows how this marketing and communications giant is structured, listing parent companies and subsidiaries with verified data from entities in over 1326 locations across 71 countries. Discover how our data can help you understand Omnicom’s worldwide presence — request your custom sample now.
In New York, United States.
About 1326 subsidiaries in over 60 countries.
Omnicom Group is publicly listed; no single majority shareholder.
Yes. Omnicom Group is incorporated in the USA (company no. 0258968540).
Omnicom Group employs tens of thousands of people worldwide.
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Knowing who owns and controls companies is essential to understanding how they operate globally. Our corporate hierarchy data helps reveal the links between parent companies, subsidiaries, and shareholders, showing the control and setup of any multinational group. Whether you’re studying Omnicom Group or another global company, this insight supports compliance procedures, market analysis, and better CRM management. With verified ownership data on over 380 million companies worldwide, CompanyData.com gives a clear picture of corporate structures across industries and countries.
At CompanyData.com, we map each company – including Omnicom Group – using a clear three-level hierarchy: Global, National, and Local headquarters. This system helps show how each part of the corporate family fits together.
Each entity carries a unique identifier, allowing users to track subsidiaries up to parent companies, trace ownership paths, and integrate data with internal systems.
Control is defined by ownership stakes. When a company owns over 50% of another, it is recorded as a controlled subsidiary. Our database focuses on these majority-owned entities to clearly map corporate hierarchies. This method provides a transparent view of complex structures such as Omnicom Group’s and can be applied universally.
This approach identifies key decision-makers within the Omnicom Group, simplifies legal compliance, and aids in risk management or merger and acquisition analysis. By mapping each entity with verified ownership links, CompanyData.com helps users confidently explore Omnicom’s global structure. With over 1,300 subsidiaries spanning 68 countries including the USA (415), Germany (151), Australia (63), Canada (37), China (38), France (58), and the UK (120), our platform provides clarity to complex international corporate frameworks.

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