| ABT Electronics, Inc | iBuyNU | Sustainable | IT and Electronics | Appliances and Electronics | |
| Lonza Walkersville | iBuyNU | | IT and Electronics | Appliances and Electronics | |
| AVI SPL | Other | | IT and Electronics | Audio Visual (AV) Integration Services | |
| Conference Technologies | Non-Catalog | | IT and Electronics | Audio Visual (AV) Integration Services | |
| Diversified | Non-Catalog | | IT and Electronics | Audio Visual (AV) Integration Services | |
| Forte (formerly AVI Systems) | Non-Catalog | | IT and Electronics | Audio Visual (AV) Integration Services | |
| Pace Systems | Other | | IT and Electronics | Audio Visual (AV) Integration Services | |
| Titan Electric | Non-Catalog | | IT and Electronics | Audio Visual (AV) Integration Services | |
| Complete Book and Media Supply | iBuyNU | Sustainable | Office | Books, DVDs, CDs | |
| Pipette Calibration | Other | | Laboratory | Calibration Services | |
| Scales and Balances Calibration | Other | | Laboratory | Calibration Services | |
| Amazing Edibles | Non-Catalog | | Food Services | Catering | |
| Catered by Design | Non-Catalog | | Food Services | Catering | |
| Catering by Michael's | Non-Catalog | | Food Services | Catering | |
| Food for Thought | Non-Catalog | | Food Services | Catering | |
| Jewell Events Catering | Non-Catalog | | Food Services | Catering | |
| Limelight | Non-Catalog | | Food Services | Catering | |
| Northwestern Dining | Internal Billing | | Food Services | Catering | |
| AT&T | Non-Catalog | | IT and Electronics | Cell Phones | testing, Phones |
| T-Mobile | Non-Catalog | | IT and Electronics | Cell Phones | |
| Canteen | iBuyNU | Sustainable | Food Services | Coffee and Pantry Supplies | |
| Apple Computers | iBuyNU | Sustainable | IT and Electronics | Computers | |
| CDW-G Computers (Lenovo) | iBuyNU | Sustainable | IT and Electronics | Computers | |
| Dell | iBuyNU | Sustainable | IT and Electronics | Computers | |
| CDW-G | iBuyNU | | IT and Electronics | Computer Supplies | |
| Amazon Business | iBuyNU | | Office | Consumer and Retail Products | testing |
| Ricoh USA, Inc. | Internal Billing | Sustainable | Office | Copiers | |
| Customs Vendor - Deltamax | Other | | Mail and Shipping | Customs Clearance and Freight | |
| DriveSavers Inc. | Non-Catalog | | IT and Electronics | Data Recovery Services | |
| Databank IMX | Non-Catalog | | Office | Document Imaging | |
| Datamation Imaging Services | Non-Catalog | | Office | Document Imaging | |
| Quartet Digital Printing & Duplicating | Internal Billing | | Printing | Duplicating Services | |
| Connexion | iBuyNU | | Maintenance Supplies (MRO) and Facilities Services | Electrical Supplies | |
| Digi-Key Electronics | iBuyNU | Sustainable | IT and Electronics | Electronic Components | |
| Morgan Laundry Services | Internal Billing | | Laboratory | Equipment Maintenance | |
| Executive Search Firms | Non-Catalog | | Professional Services | Executive Search Services | |
| EShipGlobal | Internal Billing | | Mail and Shipping | Express Mail | |
| FedEx | Internal Billing | | Mail and Shipping | Express Mail | |
| BOS - Haworth | iBuyNU | Sustainable | Office | Furniture | |
| Continua Interiors - MillerKnoll | Non-Catalog | Sustainable | Office | Furniture | |
| Forward Space, LLC - Steelcase | Non-Catalog | Sustainable | Office | Furniture | |
| Henricksen-Allsteel | iBuyNU | | Office | Furniture | |
| Ready Refresh (formerly Ice Mountain) | DPR | | Food Services | Grocery Services | |
| Arcwood Environmental | Other | | Laboratory | Hazardous Waste Removal | |
| Guest Supply | iBuyNU | | Maintenance Supplies (MRO) and Facilities Services | Hospitality Items | |
| Club Quarters | Other | Sustainable | Travel | Hotels | |
| DoubleTree by Hilton Chicago Mag Mile | Other | Sustainable | Travel | Hotels | |
| Graduate by Hilton Evanston | Other | | Travel | Hotels | |
| Hilton Garden Inn Chicago North Shore/Evanston | Other | | Travel | Hotels | |
| Hilton Orrington/Evanston | Other | | Travel | Hotels | |
| Holiday Inn Chicago North-Evanston | Other | | Travel | Hotels | |
| Hotel Saint Clair | Other | | Travel | Hotels | |
| Hyatt Centric Chicago Magnificent Mile | Other | | Travel | Hotels | |
| Hyatt House Chicago/Evanston | Other | | Travel | Hotels | |
| Omni Chicago Hotel | Other | | Travel | Hotels | |
| Peninsula Chicago | Other | Sustainable | Travel | Hotels | |
| Warwick Allerton Hotel Chicago | Other | | Travel | Hotels | |
| Fastenal Company | iBuyNU | | Maintenance Supplies (MRO) and Facilities Services | HVAC Maintenance and Repair | |
| Neuco, Inc. | Non-Catalog | | Maintenance Supplies (MRO) and Facilities Services | HVAC Maintenance and Repair | |
| North American | iBuyNU | Sustainable | Maintenance Supplies (MRO) and Facilities Services | Janitorial Supplies | |
| Class 1 Air | Non-Catalog | | Laboratory | Lab Equipment Maintenance | |
| Specialty Underwriters | Blanket | | Laboratory | Lab Equipment Maintenance | |
| Laboratory Builders, Inc. | Non-Catalog | Sustainable | Laboratory | Lab Furniture | |
| Abcam Inc. | iBuyNU | | Laboratory | Laboratory Supplies | |
| Affymetrix | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Airgas | Internal Billing | | Laboratory | Laboratory Supplies | |
| Anatomical Gift Association of Illinois | Non-Catalog | | Laboratory | Laboratory Supplies | |
| Anatomic Gift Foundation Inc. d.b.a. Anatomy Gifts Registry | Non-Catalog | | Laboratory | Laboratory Supplies | |
| BD Biosciences (Becton Dickinson & Company) | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Bio-Rad Laboratories | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Cell Signaling Technology | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| DOT Scientific | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| EMD Millipore | iBuyNU | | Laboratory | Laboratory Supplies | |
| Fisher Scientific | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Henry Schein | iBuyNU | | Laboratory | Laboratory Supplies | |
| Integrated DNA Technologies (IDT) | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Lonza Walkersville | iBuyNU | | Laboratory | Laboratory Supplies | |
| Medical Education and Research Institute (MERI) | Non-Catalog | | Laboratory | Laboratory Supplies | |
| New England BioLabs | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Promega Corporation | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Qiagen | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Rainin Instrument | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Sigma-Aldrich | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| Takara Bio USA Inc (formerly Clontech Laboratories) | iBuyNU | | Laboratory | Laboratory Supplies | |
| Thermo Fisher Scientific (formerly Life Technologies) | iBuyNU | Sustainable | Laboratory | Laboratory Supplies | |
| C2 Imaging | iBuyNU | | Printing | Letterhead and Business Cards | |
| Arrow Messenger Service | Non-Catalog | Sustainable | Mail and Shipping | Messenger Service | |
| Guy Brown LLC | iBuyNU | Sustainable | Office | Office Supplies | |
| Reebie - On-Campus Moves | Internal Billing | | Office | On Campus Moving Services | |
| JC Licht | iBuyNU | | Maintenance Supplies (MRO) and Facilities Services | Paint and Painting Supplies | |
| B&H Photo-Video | iBuyNU | | IT and Electronics | Photo and Video | |
| Johnson Pipe & Supply | iBuyNU | | Maintenance Supplies (MRO) and Facilities Services | Plumbing Supplies | |
| Amsive LLC | Non-Catalog | Sustainable | Printing | Print Firms | |
| C2 Imaging | Non-Catalog | Sustainable | Printing | Print Firms | |
| Cushing & Company | Non-Catalog | Sustainable | Printing | Print Firms | |
| Dupli-Group | Non-Catalog | Sustainable | Printing | Print Firms | |
| Graphic Arts Studio | Non-Catalog | Sustainable | Printing | Print Firms | |
| Lake County Press | Non-Catalog | Sustainable | Printing | Print Firms | |
| Marketing Communication Resource | Non-Catalog | Sustainable | Printing | Print Firms | |
| Sunrise Hitek Group LLC | Non-Catalog | Sustainable | Printing | Print Firms | |
| The Lane Press Inc. | Non-Catalog | Sustainable | Printing | Print Firms | |
| 4imprint Inc. | Non-Catalog | | Office | Promotional Products | |
| Club Colors LLC | iBuyNU | | Office | Promotional Products | |
| Corporate Imaging Concepts, LLC | iBuyNU | | Office | Promotional Products | |
| Overture Promotions | Non-Catalog | | Office | Promotional Products | |
| Reebie Storage & Moving (Allied Van Lines) - Relocation Moves | Non-Catalog | | Professional Services | Relocation Services | |
| Wheaton - Bekins | Non-Catalog | | Professional Services | Relocation Services | |
| University Police | Internal Billing | | Professional Services | Security Services | |
| Iron Mountain | DPR | Sustainable | Office | Shredding/Document Destruction Services | |
| Cushing & Company (Supplemental Pre-Qualified Vendor) | Non-Catalog | Sustainable | Printing | Signage | |
| FastSigns (Primary Preferred Vendor) | Non-Catalog | Sustainable | Printing | Signage | |
| Graphic Arts Studio (Supplemental Pre-Qualified Vendor) | Non-Catalog | Sustainable | Printing | Signage | |
| Lake County Press (Supplemental Pre-Qualified Vendor) | Non-Catalog | Sustainable | Printing | Signage | |
| Sunrise Hitek Group LLC (Supplemental Pre-Qualified Vendor). | Non-Catalog | Sustainable | Printing | Signage | |
| CDW-G (Software) | iBuyNU | | IT and Electronics | Software | |
| Code 42 (Computer Backup Software) | Non-Catalog | | IT and Electronics | Software | |
| Cvent (Event Registration Software) | Other | | IT and Electronics | Software | |
| LinkedIn Learning (formerly Lynda.com) | Other | | IT and Electronics | Software | |
| REACH Media Network (Digital Signage Software) | Non-Catalog | | IT and Electronics | Software | |
| Advanced Resources | Non-Catalog | | Professional Services | Staffing Agencies | |
| Apex Life Sciences | Non-Catalog | | Professional Services | Staffing Agencies | |
| Apex Systems Inc. | Non-Catalog | | Professional Services | Staffing Agencies | |
| City Staffing | Non-Catalog | | Professional Services | Staffing Agencies | |
| Insight Global | Non-Catalog | | Professional Services | Staffing Agencies | |
| LaSalle Network | Non-Catalog | | Professional Services | Staffing Agencies | |
| North Bridge Staffing Group | Non-Catalog | | Professional Services | Staffing Agencies | |
| Populus Group | Non-Catalog | | Professional Services | Staffing Agencies | |
| Swoon Technology Resources | Non-Catalog | | Professional Services | Staffing Agencies | |
| WunderLand Group, an affiliate of Advanced Resources | Non-Catalog | | Professional Services | Staffing Agencies | |
| Fastenal Company | iBuyNU | | Maintenance Supplies (MRO) and Facilities Services | Tools, Hardware, Miscellaneous | |
| Multilingual Connections | Non-Catalog | | Professional Services | Translation, Transcription & other language related services | |
| Charter/Bus Services | Other | | Travel | Transportation | |
| Enterprise Daily Rental Vehicles | Internal Billing | | Travel | Transportation | |
| Enterprise Fleet Vehicles | Internal Billing | | Travel | Transportation | |
| Exxon | Internal Billing | | Travel | Transportation | |
| Lyft | Other | | Travel | Transportation | |
| Key Travel | Internal Billing | | Travel | Travel Agencies | |
| Travel 100 Group | Internal Billing | | Travel | Travel Agencies | |
| Clique Studios, LLC. | Non-Catalog | | Professional Services | Website Design | |
| Digital Silk | Non-Catalog | | Professional Services | Website Design | |
| Glantz Design | Non-Catalog | | Professional Services | Website Design | |
| Neiger Design | Non-Catalog | | Professional Services | Website Design | |
| OHO Interactive | Non-Catalog | | Professional Services | Website Design | |
| Orbit Media | Non-Catalog | | Professional Services | Website Design | |
| Velir Studios | Non-Catalog | | Professional Services | Website Design | |