219 agencies credited with health campaigns. A campaign in an agency record is a lead until it has its own case.
| Agency | Kind | Country | Parent | Campaigns | With case |
|---|---|---|---|---|---|
| 3 Olives Media, LLC | Media agency | US | 2 | 2 | |
| 72andSunny | Creative generalist | US | Stagwell | 5 | 5 |
| A. Bright Idea | PR and public affairs | US | 2 | 1 | |
| Accenture Song | Creative generalist | IE, US | Accenture | 1 | 1 |
| adam&eveDDB | Creative generalist | GB | Omnicom | 3 | 0 |
| AFFIRM | Creative generalist | US | 2 | 2 | |
| Agency59 | Creative generalist | CA | 2 | 0 | |
| Alma | Creative generalist | US | Omnicom (via DDB, whose brand Omnicom retired in December 2025) | 2 | 2 |
| Amélie Company | Creative generalist | US | 2 | 2 | |
| Amsterland | Creative generalist | US | 1 | 1 | |
| AMV BBDO | Creative generalist | GB | Omnicom | 4 | 0 |
| Area 23 | Health network | US | Omnicom (Omnicom Health; formerly IPG Health / FCB Health Network) | 4 | 0 |
| Arnold Worldwide | Creative generalist | US | Havas | 4 | 3 |
| Asher Agency | Creative generalist | US | 2 | 2 | |
| Atlas Research | Government contractor | US | 1 | 1 | |
| BarkleyOKRP | Creative generalist | US | independent | 1 | 1 |
| BBC Media Action | Public health specialist | GB, IN, NG, BD, KH | BBC (charity, independently funded) | 5 | 1 |
| BBDO Dublin | Creative generalist | IE | Omnicom | 4 | 0 |
| BBDO Health | Health network | US | Omnicom (BBDO) | 0 | 0 |
| BBDO New York | Creative generalist | US | Omnicom | 5 | 3 |
| BBDO Toronto | Creative generalist | CA | Omnicom | 3 | 0 |
| BETC | Creative generalist | FR | Havas | 2 | 1 |
| Blackbird Revolt | Creative generalist | US | 1 | 1 | |
| Brogan & Partners | Creative generalist | US | 4 | 4 | |
| Brunet-García | Social marketing | US | Fors Marsh | 9 | 3 |
| Burness | PR and public affairs | US | independent | 5 | 0 |
| C+C | Social marketing | US | 1 | 1 | |
| Cactus | Creative generalist | US | 2 | 2 | |
| Caldwell VanRiper (CVR) | Creative generalist | US | independent | 1 | 1 |
| Calia | Creative generalist | BR | 5 | 0 | |
| Campbell Ewald | Creative generalist | US | Interpublic (IPG; acquired by Omnicom, Nov 2025) | 4 | 1 |
| CDM New York | Health network | US | Omnicom (Omnicom Health Group) | 1 | 0 |
| Cheil Worldwide Seoul | Creative generalist | KR | Cheil Worldwide (Samsung Group affiliate) | 2 | 1 |
| Chemistry | Creative generalist | US | 1 | 1 | |
| Chernoff Newman | Creative generalist | US | 2 | 2 | |
| Civic Edge Consulting | PR and public affairs | US | 1 | 1 | |
| Clarity Coverdale Fury | Creative generalist | US | 1 | 1 | |
| Clemenger BBDO Melbourne | Creative generalist | AU | Omnicom | 4 | 4 |
| Clemenger BBDO Wellington | Creative generalist | NZ | Omnicom | 4 | 3 |
| Coates Kokes | Social marketing | US | 1 | 1 | |
| Cog NYC | Creative generalist | US | 1 | 1 | |
| Comagine Health | Government contractor | US | 1 | 1 | |
| CommunicateHealth | Public health specialist | US | Lumina Corps | 3 | 1 |
| Crispin | Creative generalist | US | Stagwell | 4 | 4 |
| Crosby Marketing Communications | Social marketing | US | 1 | 1 | |
| Cummins&Partners | Creative generalist | AU | independent | 2 | 0 |
| Curiosity | Creative generalist | US | independent | 2 | 1 |
| Davis and Associates Communications, Inc. (D&A Communications) | PR and public affairs | US | 1 | 1 | |
| DDB Canada | Creative generalist | CA | Omnicom | 2 | 0 |
| DDB Paris | Creative generalist | FR | Omnicom | 2 | 1 |
| DDB Worldwide | Creative generalist | US | Omnicom (folded into TBWA, Dec 2025) | 7 | 5 |
| Deloitte (Government & Public Services health communication) | Government contractor | US | Deloitte | 2 | 0 |
| dentsu (US) | Creative generalist | US | Dentsu | 3 | 3 |
| dentsu health | Health network | US | Dentsu | 1 | 0 |
| DentsuBos | Creative generalist | CA | Dentsu | 2 | 0 |
| Deutsch | Creative generalist | US | Omnicom (formerly IPG) | 2 | 2 |
| Development Media International (DMI) | Public health specialist | GB, BF, TZ, MZ | independent | 5 | 2 |
| DH | Social marketing | US | 3 | 3 | |
| Digitas Health | Health network | US | Publicis Groupe (Publicis Health) | 2 | 0 |
| Drake Cooper | Creative generalist | US | independent (employee-owned) | 1 | 1 |
| Droga5 | Creative generalist | US | Accenture Song | 5 | 5 |
| Duncan Channon | Creative generalist | US | independent | 4 | 4 |
| Effct | Social marketing | US | 1 | 1 | |
| ERG (Eastern Research Group) | Government contractor | US | 1 | 1 | |
| EVERSANA INTOUCH | Health network | US | EVERSANA | 3 | 0 |
| FCB (Foote, Cone & Belding) | Creative generalist | US | Omnicom (folded into BBDO, Dec 2025; IPG until Nov 2025) | 4 | 4 |
| FCB Canada | Creative generalist | CA | Omnicom (IPG until late 2025) | 3 | 0 |
| FCB Cape Town | Creative generalist | ZA | IPG | 4 | 4 |
| FCB Health (Olixir New York) | Health network | US | Omnicom (Omnicom Health; formerly IPG Health) | 2 | 0 |
| FCB New Zealand | Creative generalist | NZ | Omnicom (formerly IPG) | 2 | 1 |
| FHI 360 | Government contractor | US | 3 | 1 | |
| Fingerpaint Group | Health network | US | independent (private-equity backed, Knox Lane) | 2 | 0 |
| FleishmanHillard | PR and public affairs | US | Omnicom | 6 | 2 |
| Fors Marsh | Government contractor | US | independent | 7 | 4 |
| Friends & Neighbors | Creative generalist | US | 1 | 1 | |
| GMMB | Public health specialist | US | Omnicom | 8 | 2 |
| Golin | PR and public affairs | US | Omnicom | 5 | 3 |
| Goodby Silverstein & Partners | Creative generalist | US | Omnicom | 1 | 0 |
| Gotham Inc. | Creative generalist | US | Interpublic (IPG) | 1 | 1 |
| Grey Argentina | Creative generalist | AR | WPP | 3 | 0 |
| Grey London | Creative generalist | GB | WPP | 3 | 0 |
| Grey Melbourne | Creative generalist | AU | WPP | 3 | 3 |
| Grey New York | Creative generalist | US | WPP | 3 | 3 |
| Grey Thailand (Bangkok) | Creative generalist | TH | WPP | 3 | 0 |
| GSD&M | Creative generalist | US | Omnicom | 2 | 1 |
| GSW | Health network | US, GB, CA | Syneos Health (Syneos Health Communications) | 5 | 0 |
| GumCo | Creative generalist | US | 1 | 1 | |
| Hager Sharp | Public health specialist | US | independent | 10 | 3 |
| Happiness Brussels | Creative generalist | BE | IPG (FCB alliance) | 4 | 1 |
| Hattaway Communications | Research evaluation | US | independent | 1 | 0 |
| Havas Health & You | Health network | US, GB | Havas | 5 | 0 |
| Hill Holliday | Creative generalist | US | Attivo Group (formerly IPG) | 2 | 2 |
| Hill+Knowlton Strategies | PR and public affairs | US | WPP | 1 | 0 |
| ICF Next | Government contractor | US | ICF International | 7 | 4 |
| Idea Engineering | Creative generalist | US | 1 | 1 | |
| Idea Kraft | Creative generalist | US | 1 | 1 | |
| Impact Marketing + Communications | Public health specialist | US | 1 | 1 | |
| IPG DXTRA (Interpublic) | Health network | US | Interpublic Group | 3 | 2 |
| IQ Solutions | Government contractor | US | 2 | 1 | |
| J. Walter Thompson | Creative generalist | US | WPP (now part of VML) | 15 | 2 |
| JOAN Creative | Creative generalist | US | independent | 1 | 1 |
| Joe Public United | Creative generalist | ZA | independent | 3 | 2 |
| John St. | Creative generalist | CA | 3 | 1 | |
| Johns Hopkins Center for Communication Programs (CCP) | Public health specialist | US, NG, TZ, ZA | Johns Hopkins Bloomberg School of Public Health | 6 | 2 |
| JOY Collective | Creative generalist | US | independent | 1 | 1 |
| JPA Health | PR and public affairs | US | 2 | 1 | |
| Kauffman & Associates, Inc. (KAI) | Government contractor | US | independent | 4 | 0 |
| Ketchum | PR and public affairs | US | Omnicom | 7 | 1 |
| Keye/Donna/Pearlstein | Creative generalist | US | defunct | 1 | 1 |
| Klick Health | Health network | CA, US, GB | independent | 4 | 0 |
| KOBI-TV NBC5 | Media agency | US | 1 | 1 | |
| KOSE | Media agency | US | 1 | 1 | |
| KPS3 | Creative generalist | US | 1 | 1 | |
| Kudu Creative LLC | Creative generalist | US | 2 | 2 | |
| Langland | Health network | GB | Publicis Groupe (Publicis Health) | 1 | 0 |
| Lawrence & Schiller | Creative generalist | US | 1 | 1 | |
| Leber Katz Partners | Creative generalist | US | Foote, Cone & Belding (from 1986) | 2 | 1 |
| Leo Burnett Bangkok | Creative generalist | TH | Publicis Groupe | 4 | 0 |
| Leo Burnett London | Creative generalist | GB | Publicis Groupe | 4 | 0 |
| Leo Burnett México | Creative generalist | MX | Publicis Groupe | 3 | 0 |
| Leo Burnett Tailor Made | Creative generalist | BR | Publicis Groupe | 3 | 1 |
| Leo Chicago | Creative generalist | US | Publicis Groupe | 3 | 2 |
| LG2 | Creative generalist | CA | independent | 8 | 7 |
| Lopez Negrete Communications | Creative generalist | US | independent | 2 | 1 |
| Lowe Lintas Mumbai | Creative generalist | IN | IPG (MullenLowe) | 3 | 2 |
| Lowe Roche | Creative generalist | CA | IPG (Lowe network) | 2 | 0 |
| lowercase productions | Creative generalist | US | 1 | 1 | |
| M&C Saatchi | Creative generalist | GB, AU | M&C Saatchi Group | 7 | 0 |
| Madwell | Creative generalist | US | independent | 3 | 2 |
| Manning Gottlieb OMD | Media agency | GB | Omnicom | 1 | 0 |
| McCann Canada | Creative generalist | CA | Omnicom (IPG until late 2025) | 4 | 0 |
| McCann Health | Health network | US, IN, CN, BR, GB | Omnicom (Omnicom Health; formerly IPG Health) | 5 | 0 |
| McCann Madrid | Creative generalist | ES | IPG | 2 | 0 |
| McCann Melbourne | Creative generalist | AU | Omnicom (formerly IPG) | 2 | 2 |
| McCann New York | Creative generalist | US | Omnicom (formerly IPG) | 3 | 2 |
| McKinney | Creative generalist | US | Cheil Worldwide (Samsung) | 1 | 1 |
| MEL | Creative generalist | US | independent | 1 | 1 |
| Merkley + Partners | Creative generalist | US | Omnicom | 4 | 2 |
| Mind & Mill | Creative generalist | US | 1 | 1 | |
| Mischief | Creative generalist | US | No Fixed Address Inc. | 2 | 1 |
| Mission Media | Creative generalist | US | 1 | 1 | |
| Monahan Dayman Adams | Creative generalist | AU | defunct | 2 | 1 |
| Mother New York | Creative generalist | US | Mother (independent; network led from Mother London) | 1 | 0 |
| Mullen (MullenLowe U.S.) | Creative generalist | US | Omnicom (TBWA); formerly IPG. Brand dissolved December 2025 | 1 | 1 |
| MullenLowe London | Creative generalist | GB | IPG | 5 | 0 |
| O'Donnell Company | Social marketing | US | 1 | 1 | |
| Octane Public Relations | PR and public affairs | US | 1 | 1 | |
| Ogilvy Bangkok | Creative generalist | TH | WPP | 3 | 1 |
| Ogilvy Brasil | Creative generalist | BR | WPP | 4 | 1 |
| Ogilvy Health | Health network | US, GB, ZA | WPP | 2 | 0 |
| Ogilvy India | Creative generalist | IN | WPP | 2 | 1 |
| Ogilvy New York | Creative generalist | US | WPP | 3 | 2 |
| Ogilvy Public Relations (Ogilvy Washington) | PR and public affairs | US | WPP | 7 | 4 |
| Ogilvy Singapore | Creative generalist | SG | WPP | 2 | 2 |
| Ogilvy South Africa | Creative generalist | ZA | WPP | 2 | 1 |
| OMNI Institute | Research evaluation | US | 1 | 1 | |
| OpAD Media Solutions | Media agency | US | 1 | 1 | |
| Overflow | Creative generalist | US | 1 | 1 | |
| Palladian Partners | Government contractor | US | Altarum | 1 | 1 |
| Partners + Napier | Creative generalist | US | Project Worldwide | 1 | 1 |
| Patients & Purpose | Health network | US | Omnicom (Omnicom Health; merged into Remedy Edge, December 2025) | 3 | 0 |
| Pereira O'Dell | Creative generalist | US | Serviceplan Group (independent; formerly MDC Partners) | 3 | 3 |
| Plowshare Group, Inc. | Public health specialist | US | 1 | 1 | |
| Population Services International (PSI) | Social marketing | US, NL | independent | 7 | 1 |
| Porter Novelli | PR and public affairs | US | Omnicom | 7 | 2 |
| PRR | Public health specialist | US | independent | 4 | 1 |
| Publicis Dublin | Creative generalist | IE | Publicis Groupe | 2 | 0 |
| Publicis Health | Health network | US | Publicis Groupe | 2 | 0 |
| R&R Partners | Creative generalist | US | independent | 1 | 1 |
| Razorfish Health | Health network | US | Publicis Groupe (Publicis Health) | 1 | 0 |
| RDW Group | Creative generalist | US | 1 | 1 | |
| Real Chemistry | Health network | US | independent (private-equity backed) | 2 | 0 |
| Reingold | Government contractor | US | 2 | 1 | |
| Rescue | The Behavior Change Agency | Social marketing | US | independent | 13 | 9 |
| Roc Star Studio | Creative generalist | US | 1 | 1 | |
| RTI International | Research evaluation | US | independent | 8 | 8 |
| Runyon Saltzman & Einhorn | Social marketing | US | 1 | 1 | |
| Russell Herder | Creative generalist | US | 3 | 3 | |
| Saatchi & Saatchi Brussels | Creative generalist | BE | Publicis Groupe | 2 | 2 |
| Saatchi & Saatchi New York | Creative generalist | US | Publicis Groupe | 7 | 1 |
| Saatchi & Saatchi Wellness | Health network | US, AU | Publicis Groupe (Publicis Health) | 4 | 0 |
| Scali, McCabe, Sloves | Creative generalist | US | Lowe Group / Interpublic (from 1993; Ogilvy & Mather 1976-93, WPP from 1989) | 3 | 1 |
| Scholz & Friends | Creative generalist | DE | WPP | 3 | 0 |
| SE2 | Social marketing | US | independent (IPREX network member) | 4 | 4 |
| Serviceplan Group France | Creative generalist | FR, DE | Serviceplan Group (independent) | 2 | 0 |
| Shuga Global | Public health specialist | GB, ZA, NG, KE, CI, IN | independent charity (originally MTV / Viacom; now Paramount-linked) | 5 | 1 |
| Soul City Institute for Social Justice | Public health specialist | ZA | independent | 6 | 1 |
| Spitfire Strategies | PR and public affairs | US | independent | 3 | 0 |
| SRB Communications | PR and public affairs | US | 1 | 1 | |
| Standard Practice | Creative generalist | US | independent | 1 | 1 |
| Syneos Health Communications | Health network | US | Syneos Health (private since 2023) | 1 | 0 |
| Synergy Enterprises | Government contractor | US | 1 | 1 | |
| TBWA\Chiat\Day | Creative generalist | US | Omnicom (TBWA Worldwide) | 3 | 2 |
| TBWA\Hunt\Lascaris | Creative generalist | ZA | Omnicom | 3 | 1 |
| TBWA\Paris | Creative generalist | FR | Omnicom | 5 | 0 |
| The Be Kind People Project | Social marketing | US | 1 | 1 | |
| The Concept Farm | Creative generalist | US | 1 | 1 | |
| The Manahan Group | Creative generalist | US | 1 | 1 | |
| The Martin Agency | Creative generalist | US | Omnicom (formerly IPG) | 1 | 0 |
| Tombras | Creative generalist | US | independent | 6 | 4 |
| TransMountain Media (Cisco Beach Partners, Inc.) | Media agency | US | 1 | 1 | |
| True North Communications, Inc. | Media agency | US | 1 | 1 | |
| Vanguard Communications | Social marketing | US | independent | 6 | 0 |
| VCCP | Creative generalist | GB, AU | Chime (Providence Equity) | 4 | 0 |
| Venables Bell & Partners | Creative generalist | US | independent | 2 | 1 |
| Vital Strategies | Public health specialist | US | independent (nonprofit) | 3 | 3 |
| VML Health | Health network | US, GB, BE, AU | WPP | 4 | 0 |
| VogtGoldstein | Creative generalist | US | 1 | 1 | |
| Walton Isaacson | Creative generalist | US | 1 | 1 | |
| Weber Shandwick | PR and public affairs | US | IPG | 5 | 1 |
| Wells, Rich, Greene | Creative generalist | US | BDDP (from 1990; defunct 1998) | 1 | 1 |
| Westat | Research evaluation | US | independent | 3 | 2 |
| Wieden+Kennedy | Creative generalist | US | independent | 3 | 0 |
| Writ Large PR, LLC | PR and public affairs | US | 1 | 1 | |
| Wunderman Buenos Aires | Creative generalist | AR | WPP | 3 | 0 |
| Y&R Cape Town | Creative generalist | ZA | WPP | 2 | 2 |
| Young & Rubicam | Creative generalist | US | WPP (now part of VML) | 17 | 4 |
| Your Social Marketer, Inc. | Social marketing | US | 1 | 1 | |
| Zulu Alpha Kilo | Creative generalist | CA, US | independent | 6 | 5 |