| Item | Obligations |
|---|---|
| Department of Homeland Security | $785M |
| Department of Defense | $216M |
| General Services Administration | $25.7M |
| National Gallery of Art | $11.7M |
| Smithsonian Institution | $6.3M |
| Department of Health and Human Services | $2.8M |
| Department of Commerce | -$33.4M |
Department of Homeland Security is Whiting Turner Contracting Company the's largest federal customer, with $785M obligated (77.4% of the company's federal obligations).