| Ace Sign Co. | 32992 | Contractor | — |
| AHD Companies LLC | 40699 | Construction Manager | — |
| AHD Companies LLC | 40709 | Construction Manager | — |
| Anderson Electric Inc. | 14349 | Contractor | — |
| Andrews Engineering, Inc. | 30141 | A/E | — |
| Apex Fire Sprinkler Company LLC | 35389 | Subcontractor | — |
| Apex Fire Sprinkler Company LLC | 35696 | Contractor | — |
| Arena Food Service, Inc. | 40679 | Vendor | — |
| B & B Electric, Inc. | 5478 | Contractor | — |
| Berners-Schober Associates Inc | 29455 | A/E | — |
| Buckleys Prairie Landscaping Inc | 31297 | Subcontractor | — |
| Capitol Construction Group LLC | 34817 | Contractor | — |
| Capitol Group, Inc. | 8238 | Supplier | — |
| Charles Joseph Pell Architects Incorporated | 21616 | A/E | — |
| Crawford, Murphy & Tilly, Inc. | 1579 | A/E | — |
| CW3M Company | 22705 | Subcontractor | — |
| Designed Roofing Systems, Inc. | 20360 | Contractor | — |
| E.L. Pruitt Company | 26284 | Contractor | — |
| Earth Worx Solutions LLC | 35901 | Subcontractor | — |
| Eddington Company L,L,C, | 40788 | Subcontractor | — |
| Environmental Compliance Consultants, Inc. | 40623 | Subcontractor | — |
| Environmental Control Solutions, Inc. | 31144 | Contractor | — |
| Evan Lloyd Associates, Inc. | 16668 | A/E | — |
| Evans Construction Co. | 181 | Contractor | — |
| Farnsworth Group, Inc. | 34869 | A/E | — |
| Fehr-Graham & Associates LLC | 30091 | A/E | — |
| Fendrich Engineering, Inc. | 22463 | A/E | — |
| Fuhrmann Engineering, Inc. | 28140 | A/E | — |
| Graham and Hyde Architects, Inc. | 25902 | A/E | — |
| GreenAssociates Inc | 29328 | A/E | — |
| Greene & Bradford, Inc. of Springfield | 17951 | A/E | — |
| Hanson Professional Services Inc. | 28483 | A/E | — |
| Hardsurfacing, Inc. | 41036 | Subcontractor | — |
| Harold O'Shea Builders, Inc. | 20133 | Contractor | — |
| Harold O'Shea Builders, Inc. | 40960 | Construction Manager | — |
| Henson Robinson Co | 40559 | Vendor | — |
| Henson Robinson Company | 279 | Contractor | — |
| I.D. Signs and Service, Inc. | 40829 | Vendor | — |
| Jennings Painting Inc. | 34438 | Contractor | — |
| John Shafer & Associates, Inc. | 27519 | A/E | — |
| Kuhn & Trello Consulting Engineers, LLC | 32353 | A/E | — |
| Kwik-Wall Illinois LLC | 35354 | Subcontractor | — |
| Lincoln Land Excavation & Demolition, Inc. | 40811 | Subcontractor | — |
| Massie Massie & Associates, Inc. | 17361 | A/E Specialty Consultant | — |
| Melotte Morse Leonatti Parker Ltd. | 30379 | A/E | — |
| MLN Enterprises | 32406 | Subcontractor | — |
| P. H. Broughton & Sons, Inc. | 4670 | Contractor | — |
| Pathway Elite Basketball LLC | 41080 | Subcontractor | — |
| Petersburg Plumbing and Excavating, LLC | 31732 | Contractor | — |
| Quigg Engineering Inc. | 31661 | A/E | — |
| R. L. Vollintine Construction, Inc. | 2942 | Contractor | — |
| R.D. Lawrence Construction Company, Ltd. | 2923 | Contractor | — |
| RD Lawrence Construction Corporation of Springfield | 41081 | Contractor | — |
| Reliable Environmental Solutions, Inc. | 30713 | A/E | — |
| Reyhan Bros., Inc. | 19271 | Contractor | — |
| Ron Furman's Commercial Sweeping and Paving, Inc | 34991 | Contractor | — |
| Roofing Associates LLC | 34323 | Contractor | — |
| Savage Doorways Inc | 32037 | Supplier | — |
| Selvaggio Ornamental & Structural Steel, Inc. | 33507 | Supplier | — |
| Solid Ground Solutions Inc. | 34955 | Subcontractor | — |
| South Town Refrigeration Corp | 15434 | Subcontractor | — |
| Springfield Electric Supply Co | 10032 | Supplier | — |
| Steckel-Parker Architects, Inc. | 3592 | A/E | — |
| Studio NYL-IL LLC | 35946 | A/E Specialty Consultant | — |
| United Contractors Midwest, Inc. | 31135 | Contractor | — |
| United Contractors Midwest, Inc. | 31136 | Contractor | — |
| United Contractors Midwest, Inc. | 33548 | Contractor | — |
| Veenstra & Kimm, Inc. | 34336 | A/E | — |
| Western Waterproofing Company, Inc. | 746 | Contractor | — |
| WHKS & Co. | 30881 | A/E | — |
| WSP USA Inc. | 40432 | A/E | — |