| Business | Founded | Contacts |
|---|---|---|
| McMaster Divinity College | 1887 | 7 |
| McMaster Research | 1887 | - |
| McMaster School of Graduate Studies | 1887 | - |
| McMaster Engineering Musical (Mac Eng Musical) | 1958 | 21 |
| DeGroote Commerce Society - DCS | 1967 | 19 |
| Phoenix McMaster | 1969 | 1 |
| The Phoenix Bar & Grill | 1969 | - |
| Innis Library | 1974 | - |
| H.G. Thode Library of Science and Engineering | 1978 | - |
| McMaster World Congress | 1978 | 4 |
| McMaster Association of Part-time Students | 1979 | 1 |
| Society of Off-Campus Students | 1981 | - |
| McMaster Social Sciences Society | 1986 | 1 |
| McMaster Humanities Society | 1988 | - |
| Bay Area Restoration Council | 1991 | - |
| McMaster Jewish Students Assoc | 1991 | 1 |
| McMaster Philosophers' Society | 2001 | 3 |
| McMaster University Student Centre | 2002 | - |
| University Centre Pharmacy | 2002 | - |
| McMaster Children's Centre | 2003 | 1 |
| Cuew Local 6 | 2004 | - |
| Invitrogen Canada Inc | 2004 | - |
| Adaptive Systems Laboratory | - | 1 |
| Cfmu-FM 93.3 | 2005 | - |
| MARS Apprentice | 2005 | 1 |
| McMaster Advanced Control Consortium | - | 1 |
| McMaster Children's Hospital | - | 1 |
| Cappa-D | - | - |
| LIFT Church | 2006 | - |
| Student Council | - | 1 |
| Bioactive Paper | - | - |
| McMaster-Syracuse MCM - Master of Communications Management | 2007 | - |
| Reimar Construction | 2007 | - |
| Savvis Communications Inc | 2007 | - |
| COPE: A Student Mental Health Initiative | 2008 | - |
| Centre for Probe Development and Commercialization | 2008 | 61 |
| Comstock Canada Ltd | 2008 | - |
| Neurogym Rehabilitation | - | - |
| Power Cable Installations Toronto Limited | - | - |
| TwelvEighty Bar and Grill | 2009 | 4 |
| Boston University | - | 1 |
| CAMH Centre for Addiction and Mental Health | - | 1 |
| Cogeco Cable Inc. | - | 1 |
| Grey Bruce Health Services | - | 1 |
| Homewood Employee Health Inc | - | 5 |
| MSU Campus Events | 2010 | - |
| National Research Council Canada | - | 1 |
| Pennsylvania State University | - | 1 |
| St. Joseph's Healthcare | - | 2 |
| The Regional Municipality of Halton | - | 1 |
| University of Southern California | - | 1 |
| Avondale Stores Limited | - | 1 |
| Look Communications Inc. | - | 1 |
| McMaster University Library | - | 1 |
| Rogers Communications Inc. | - | 1 |
| The University of Chicago | - | 3 |
| The University of Toronto | - | 1 |
| BioPed | - | - |
| Business in Motion | - | - |
| Chris McAllister | - | 1 |
| Combining Two Cultures Conference | - | 1 |
| Faculty Of Health Sciences | - | - |
| John Hodgins Engineering Building | - | - |
| Kathy Murphy | - | 1 |
| McMaster Contemporary Medical Acupuncture Program | - | - |
| McMaster Institute for Transportation & Logistics | - | - |
| McMaster Off-Campus Resource Centre | - | - |
| Michael G. DeGroote Centre for Learning and Discovery | - | - |
| Mills Memorial Library | - | - |
| Opirg - TLC | - | 1 |
| Pan-Canadian Health Reform Analysis Network | - | 1 |
| People and Profits | - | 1 |
| A.N. Bourns Science Building | - | - |
| AIC Lounge | - | - |
| Alumni House | - | - |
| Andrew's office | - | - |
| Biology Greenhouse | - | - |
| Burke Science Building | - | - |
| Café One | - | - |
| Campus Dental | - | - |
| Canadian Center for Electron Microscopy | - | - |
| Chester New Hall | - | - |
| Cibc Hall | - | - |
| Clarke Centre | - | - |
| Commons Building (CB) | - | - |
| Communications Research Laboratory (CRL) | - | - |
| Corner Cafe | - | - |
| Council Chambers | - | - |
| DC2012 Homebase | - | - |
| DeltaHacks | 2014 | 5 |
| Department of Mathematics & Statistics @ McMaster University | - | - |
| Divinity College (DC) | - | - |
| Dramatic Arts Workshop | - | - |
| Edwards Hall | - | - |
| Engineering Technology Building ETB | - | - |
| General Sciences Building (GS) | - | - |
| H.G. Thode Science and Engineering Library | - | - |
| Hamilton Hall (HH) | - | - |
| Health Sciences Library, McMaster University | - | - |
| Kenneth Taylor Hall (KTH) | - | - |
| Life Touch Prestige Portraits | - | - |
| Lloyd Media Centre | - | - |
| Lunch Room | - | - |
| Mac Express JHE | - | - |
| Mac Farmstand | - | - |
| Made in Japan | - | - |
| Math Café | - | - |
| Matthews Hall | - | - |
| McKay Hall | - | - |
| Michael DeGroote Centre for Learning and Discovery (MDCL) | - | - |
| Michael G. DeGroote School of Business (DSB) | - | - |
| Moulton Hall | - | - |
| Needa Pita | - | - |
| Nuclear Research Building | - | - |
| Occupy McMaster | - | - |
| Office of the Registrar | - | - |
| Prelim Laboratory (T13) | - | - |
| Psychology Building (PC) | - | - |
| R.E.A.D. On Bookstore | - | - |
| Refectory (REF) | - | - |
| Taro Bubble Tea and Halal Foods | - | - |
| The Cave | - | - |
| The Tank (McMaster Auxiliary Textbook Store) | - | - |
| University Hall (UH) | - | - |
| Wallingford Hall | - | - |
| Whidden Hall | - | - |
| Woodstock Hall | - | - |
| Campus Dentist McMaster University Student Centre | - | - |
| MAC Formula Electric | 2015 | 10 |
| MSU Diversity Services | - | - |
| MSU First Year Council (FYC) | - | - |
| McMaster University Library | - | - |
| School of the Arts Career | - | - |
| Starbucks | - | - |
| Centro - Hamilton, ON, Canada | - | - |
| East Meets West Bistro | - | - |
| Foresight Pharmaceuticals | 2016 | - |
| LIVELab | - | 1 |
| La Piazza | - | - |
| McMaster GO Station | - | - |
| Teriyaki Experience | - | - |
| Alumni Memorial Hall | - | - |
| MSU Emergency First Response Team | - | - |
| Pharmasave McMaster University Centre | - | - |
| Phoenix Craft House and Grill | - | - |
| McMaster Performance | - | - |
| See more details on www.bizaddress.net | ||