| Name | Jurisdiction of Incorporation/Formation | |
| 1208075 Ontario Limited | Ontario | |
| 2329640 Ontario Inc. | Ontario | |
| 2340432 Ontario Inc. | Ontario | |
| 6 Degrees Integrated Communications Corp. | Ontario | |
| 72andSunny NL B.V. | Netherlands | |
| 72andSunny Partners LLC | Delaware | |
| 72andSunny Partners LLC | New York | |
| 72andSunny Pte. Ltd. | Republic of Singapore | |
| 72andSunny Pty Ltd | New South Wales | |
| 7thfl LLC | Delaware | |
| 939GP Inc. | Ontario | |
| Accumark Partners Inc. | Ontario | |
| ACE Content LLC | Delaware | |
| Albion Brand Communication Limited | United Kingdom | |
| Allegory LLC | Delaware | |
| Allison & Partners Holdings (Thailand) Limited | Bangkok | |
| Allison & Partners LLC | Delaware | |
| Allison & Partners Thailand Limited | unknown | |
| Allison and Partners K.K. | Tokyo | |
| Allison Kommunikation GmbH | Berlin | |
| Allison Partners Limited | Wanchai | |
| Allison PR (Beijing) Limited | Beijing | |
| Allison+Partners Singapore Pte Ltd | Republic of Singapore | |
| Allison+Partners UK Limited | England | |
| Alveo LLC | Delaware | |
| Anomaly (Shanghai) Advertising Co., Ltd. | Shanghai | |
| Anomaly B.V. | Netherlands | |
| Anomaly Inc. | Ontario | |
| Anomaly London LLP | United Kingdom | |
| Anomaly Partners LLC | Delaware | |
| Anomaly UK Limited | United Kingdom | |
| Antidote 360 LLC | Delaware | |
| Attention Partners LLC | Delaware | |
| Boom Marketing Inc. | Ontario | |
| Born AI LLC | Delaware | |
| Bruce Mau Design (USA) LLC | Delaware | |
| Bruce Mau Design Inc. | Ontario | |
| Bruce Mau Holdings Ltd. | Ontario | |
| Capital C Partners GP Inc. | Ontario | |
| Colle & McVoy LLC | Delaware | |
| Com.motion Inc. | Delaware | |
| Concentric Health Experience Limited | United Kingdom | |
| Concentric Partners LLC | Delaware | |
| CP+B - Crispin Porter & Bogusky Brasil Publicidade e Participacao Ltda. | Sao Paulo | |
| Crispin Porter & Bogusky (Hong Kong) Limited | Hong Kong | |
| Crispin Porter & Bogusky LLC | Delaware | |
| Crispin Porter & Bogusky Ltd | United Kingdom | |
| Crispin Porter + Bogusky Denmark ApS | Copenhagen | |
| Crispin Porter + Bogusky Scandinavia AB | Sweden | |
| Cultura United Agency LLC | Delaware | |
| Doner Limited | United Kingdom | |
| Doner Partners LLC | Delaware | |
| Dotglu LLC | Delaware | |
| Elixir Health Experience LLC | Delaware | |
| Enplay Partners LLC | Delaware | |
| Expecting Productions, LLC | California | |
| Forsman & Bodenfors AB | Sweden | |
| Forsman & Bodenfors Factory AB | unknown | |
| Forsman & Bodenfors Inhouse AB | unknown | |
| Forsman & Bodenfors Studios AB | unknown | |
| Gale Creative Agency Private Limited | Bangalore | |
| Gale Partners Inc. | Ontario | |
| Gale Partners LLC | Delaware | |
| Gale Partners LP | Ontario | |
| Happy Forsman & Bodenfors AB | unknown | |
| Hecho en 72 LLC | Delaware | |
| Hello Design, LLC | California | |
| HL Group Partners Limited | United Kingdom | |
| HL Group Partners LLC | Delaware | |
| HPR Partners, LLC | Delaware | |
| Hudson and Sunset Media, LLC | Delaware | |
| Hunter PR Canada LP | Ontario | |
| Hunter PR UK Limited | United Kingdom | |
| Hunter Public Relations UK Limited | United Kingdom | |
| KBP Holdings LLC | Delaware | |
| KBS (Hong Kong) Limited | Unknown | |
| KBS (Shanghai) Advertising Co., Ltd. | Shanghai | |
| KBS+P Canada LP KBS+P Canada SEC | Ontario | |
| KBS+P Ventures LLC | Delaware | |
| Kenna Communications GP Inc. | Ontario | |
| Kenna Communications LP | Ontario | |
| Kingsdale Partners LP | Ontario | |
| Kingsdale Shareholder Services US LLC | Delaware | |
| Kirshenbaum Bond Senecal & Partners LLC | Delaware | |
| KIS Investor Services Inc. (Barbados) | Barbados | |
| Kollo AB | unknown | |
| Kwittken & Company Limited | United Kingdom | |
| Kwittken LLC | Delaware | |
| Kwittken LP | Ontario | |
| Kwittken Ltd. | United Kingdom | |
| Laird + Partners New York LLC | Delaware | |
| Laurie, Foard & Wheeler Limited | Unknown | |
| Laurie, Ford + Wheeler LLC | Delaware | |
| LBN Partners LLC | Delaware | |
| Legend PR Partners LLC | Delaware | |
| LifeMed Media, Inc. | Delaware | |
| Luntz Global Partners LLC | Delaware | |
| Main North LP | Ontario | |
| Maxxcom (Barbados) Inc. | Barbados | |
| Maxxcom (USA) Finance Company | Delaware | |
| Maxxcom (USA) Holdings Inc. | Delaware | |
| Maxxcom Global Media LLC | Delaware | |
| Maxxcom Inc. | Delaware | |
| MDC Acquisition Inc. | Delaware | |
| MDC Canada GP Inc. | Canada | |
| MDC Corporate (US) Inc. | Delaware | |
| MDC Europe Ltd. | United Kingdom | |
| MDC Gale43 GP Inc. | Ontario | |
| MDC Innovation Partners LLC | Delaware | |
| MDC Kingsdale GP Inc. | Ontario | |
| MDC Partners Inc. | Canada | |
| MDC Partners UK Holdings Limited | United Kingdom | |
| Mono Advertising, LLC | Delaware | |
| New Team LLC | Delaware | |
| No Sleep Productions LLC | Delaware | |
| Northstar Management Holdco Inc. | Ontario | |
| Northstar Research GP LLC | Delaware | |
| Northstar Research Holdings Canada Inc. | Ontario | |
| Northstar Research Holdings USA LP | Delaware | |
| Northstar Research Partners (UK) Limited | United Kingdom | |
| Northstar Research Partners (USA) LLC | Delaware | |
| Northstar Research Partners Inc. (ON) | Ontario | |
| Pictor Digital Creative Services LLC | Delaware | |
| Plus Productions, LLC | Delaware | |
| Pt. Northstar Business Consulting Partners | Republic of Indonesia | |
| Redscout LLC | Delaware | |
| Redscout Ltd. | United Kingdom | |
| Relevent Partners LLC | Delaware | |
| Rumble Fox LLC | Delaware | |
| Sloane & Company LLC | Delaware | |
| SML Partners Holdings LLC | Delaware | |
| Source Marketing LLC | New York | |
| Studio Pica Inc. | Canada | |
| Sugar Daddy Development, LLC | Delaware | |
| TargetCast LLC | Delaware | |
| Targetcom LLC | Delaware | |
| TC Acquisition Inc. | Delaware | |
| TEAM LP | Ontario | |
| The Arsenal LLC | Delaware | |
| The Path Worldwide Limited | United Kingdom | |
| Trade X Partners LLC | Delaware | |
| Trailer Productions, LLC | California | |
| TS Holdings LP | Ontario | |
| Union Advertising Canada LP | Ontario | |
| Unique Influence Partners LLC | Delaware | |
| Varick Media Management LLC | Delaware | |
| Veritas Communications Inc. | Ontario | |
| Vitro Partners LLC | Delaware | |
| VitroRobertson LLC | Delaware | |
| Walker Brook Capital LLC | Delaware | |
| Y Media Labs LLC | Delaware | |
| Y Media Labs Private Limited | unknown | |
| Yamamoto Moss Mackenzie, Inc. | Delaware | |
| Zig Management (USA) Inc. | Delaware | |
| Zyman Group, LLC | Delaware | |
