| | | | | | | | |
| Company Name | | State (U.S.) |
| Acxiom LLC | | Delaware |
| Business Science Research Corporation | | Delaware |
| Carmichael Lynch, Inc. | | Minnesota |
| Chase Design Holdings, LLC | | Delaware |
| DeVries Public Relations, Ltd. | | New York |
| FCBCure, LLC | | New Jersey |
| Genuine Interactive, LLC | | Massachusetts |
| Gillespie, LLC | | Delaware |
| Huge, LLC | | New York |
| Independent Advertising, LLC | | Delaware |
| IPG Asia & Oceania LLC | | Delaware |
| IPG Health, LLC | | Delaware |
| Lowe & Partners Worldwide Inc. | | Delaware |
| Lowe Group Holdings, Inc. | | New York |
| Mediahub Minneapolis, LLC | | Minnesota |
| McCann-Erickson Marketing, Inc. | | New York |
| McCann-Erickson USA, Inc. | | Delaware |
| McCann-Erickson Worldwide, Inc. | | Delaware |
| McCann Health North America, LLC | | New Jersey |
| McCann Relationship Marketing, LLC | | Delaware |
| Mediabrands Worldwide, Inc. | | California |
| Momentum Events LLC | | Delaware |
| Octagon, Inc. | | District of Columbia |
| Reprise Media, Inc. | | Delaware |
| True North Communications Inc. | | Delaware |
| Universal McCann Worldwide, LLC | | Delaware |
| | |
| Company Name | | Country |
| Interpublic Group Deutschland GmbH | | Germany |
| Interpublic Group of Companies de Espana, S.L. | | Spain |
| Interpublic Holding Company, S.A. de C.V. | | Mexico |
| Interpublic Limited | | United Kingdom |
| IPG Advertising Israel Holdings Ltd | | Israel |
| Kinesso Corp. | | Canada |
| Orion Trading Canada Inc. | | Canada |
| The Interpublic Group of Companies Canada, Inc. | | Canada |