| Amalgamated Bank of Chicago | Bank | $869,688 |
| RSM US LLP | Consultant | $200,223 |
| Sos Security LLC | Security Services Provider | $148,442 |
| Wells Fargo Financial Leasing | Leasing Company | $142,751 |
| AT & T | Phone Company | $140,777 |
| K-Plus | IT Service Provider | $139,500 |
| UnionWare | Database Software | $131,093 |
| Comed | Utility Company | $122,888 |
| M&J Wilkow Properties, LLC | Property Manager | $122,291 |
| SEIU Local 2000 H&W | Propery Management | $103,545 |
| Harvard Maintenance, Inc | Maintenance Service | $101,974 |
| Graff, Ballauer & Blanksi, P.C | Accounting Firm | $92,664 |
| Clarion River Group | Management Consulting | $89,670 |
| Titan Security Services, Inc. | Security Services | $76,381 |
| Schiele Graphics Inc. | Printing Company | $68,519 |
| Meridan IT | IT Service Provider | $60,968 |
| Paylocity | Payroll Service Provider | $55,827 |
| Corporate Concierge Servs., Inc | Guest Service Provider | $53,555 |
| Addison Group | Staffing Agency | $51,875 |
| CBRE Tech Services | Technical Services | $49,568 |
| Insight | Technology Solutions Company | $45,198 |
| Concur Technologies | Travel & Expense Service | $43,118 |
| Air Comfort Corporation | HVAC providers | $41,958 |
| Chase Bank | Bank | $40,776 |
| Cristo Rey Jesuit High School | Work Study Program Coordinators | $40,082 |
| United States Postal Service | Postal Service Provider | $39,549 |
| Microsoft Corporation | Technology Company | $36,165 |
| Accounting Principals, Inc | Staffing Agency | $36,122 |
| Knowledgelake Inc | Computer Software | $34,414 |
| True North Travel Solutions | Bus Company | $32,521 |
| Alvarez Porter Group | Consultant | $21,315 |
| Treasurer, State Of Illinois | Government Agnecy | $20,650 |
| Southwest Airlines | Airline | $19,318 |
| Pitney Bowes | Postage & Shipping Equipment Provider | $18,469 |
| Illinois Department of Transportation | Department of Transportation | $17,700 |
| Tele Town Hall LLC | Call Center Services | $16,788 |
| Meltwater News US Inc | Media Monitoring Developer | $16,080 |
| Department of Labor | Regulatory Agency | $16,000 |
| Impact Networking LLC | Supplies Company | $14,961 |
| Hustle, Inc. | Peer to Peer Messaging Service | $11,659 |
| Berlin Rosen LTD | Consultant | $9,364 |
| SEIU | Labor Organization | $8,972 |
| Moxie Media | Communications Company | $8,753 |
| Thyssenkrupp Elevator Corp | Elevator Company | $8,317 |
| Commerce Bank | Bank | $8,273 |
| Aaron Lorence | Communication services | $8,109 |
| Veritiv Operating Co. | Cleaning Supply Distributor | $8,034 |
| SEIU-CC, LLC | Call Center Services | $7,922 |
| Independent Recycling Services | Waste and Recycling Companies | $7,509 |
| Drury Inn & Suites | Hotel | $7,479 |
| Facebook Advertising USA | Communications Company | $7,178 |
| Amazon | Supply Company | $7,108 |
| United Postal Service | Postal Service Provider | $6,986 |
| Mark Vend Company | Vending Machine Supplier | $6,573 |
| Hard Surface Finishers, Inc. | Building Maintenance | $6,540 |
| The Sexton Group | Communications Company | $6,405 |
| Advent Systems, Inc. | Security and Investigations | $6,394 |
| AVIS Rent A Car Corporation | Car Rental Provider | $6,331 |
| McFarlane Douglass & Companies | Seasonal Landscaping Services | $6,181 |
| H-Cap Education Association, Inc. | Labor Organization | $6,000 |
| Ace Metal Refinishers, Inc | Metal Refinishing and Restoration Company | $5,685 |
| Intuit Inc. | Software Company | $5,244 |
| Streamline Communications Corp | Communication service | $5,188 |
