| Item | Obligations |
|---|---|
| W S DARLEY & CO | $1.5B |
| UCHICAGO ARGONNE, LLC | $1.1B |
| MEDLINE INDUSTRIES, LP | $943M |
| FERMI FORWARD DISCOVERY GROUP, LLC | $770M |
| NORTHROP GRUMMAN SYSTEMS CORPORATION | $575M |
| SUPPLYCORE LLC | $564M |
| BP PRODUCTS NORTH AMERICA INC. | $413M |
| W.W. GRAINGER, INC. | $341M |
| DDB CHICAGO INC. | $310M |
| CARDINAL HEALTH 200, LLC | $291M |
W S DARLEY & CO led all contractors in Illinois with $1.5B, 13.7% of the state total.