CLIENTS
| Campaign Type | |
|---|---|
| H | |
| Richard Hack | Past |
| David Halberstam | |
| Kathryn Harrison | |
| Mickey Hart | |
| David Alan Harvey | |
| Elizabeth Hayt | |
| Noreena Hertz | |
| Sherre Hirsch | Past |
| Wendy Holden | |
| Dr. Michael F. Holick | |
| Amanda Goldberg and Ruthanna Khalighi Hopper | Past |
| Arianna Huffington | |
| Robert Hughes | |
| Reed A. Hundt | |
| Tab Hunter | |
| Dr. Mark Hyman | Ongoing |