| National Defence | Federal | 5,870 | $1,163,894,661 | 72 |
| Public Services and Procurement Canada | Federal | 1,523 | $884,958,731 | 140 |
| Global Affairs Canada | Federal | 1,406 | $185,844,353 | — |
| Parks Canada | Federal | 929 | $64,951,139 | 17 |
| Royal Canadian Mounted Police | Federal | 844 | $73,163,343 | 9 |
| Fisheries and Oceans Canada | Federal | 664 | $99,795,285 | 8 |
| National Research Council Canada | Federal | 455 | $413,951,112 | 24 |
| Agriculture and Agri-Food Canada | Federal | 409 | $157,877,342 | — |
| Environment and Climate Change Canada | Federal | 407 | $51,769,613 | — |
| Correctional Service of Canada | Federal | 373 | $18,816,244 | 16 |
| Transport Canada | Federal | 182 | $51,890,766 | — |
| Natural Resources Canada | Federal | 173 | $60,026,295 | — |
| Canada Border Services Agency | Federal | 111 | $38,518,132 | 2 |
| Canadian Food Inspection Agency | Federal | 88 | $18,406,170 | 3 |
| Canadian Space Agency | Federal | 45 | $40,125,290 | 1 |
| Health Canada | Federal | 39 | $34,430,760 | — |
| Ontario Education Collaborative Marketplace (OECM) | Provincial | 29 | — | 3 |
| Public Health Agency of Canada | Federal | 25 | $107,138,704 | 2 |
| Veterans Affairs Canada | Federal | 21 | $4,051,227 | — |
| Innovation, Science and Economic Development Canada | Federal | 21 | $2,855,985 | — |
| Canada Revenue Agency | Federal | 17 | $409,899 | 4 |
| Indigenous Services Canada | Federal | 13 | $3,245,707 | 5 |
| Canadian Heritage | Federal | 13 | $3,075,222 | — |
| City of Toronto — Facilities Operations | Municipal | 12 | $17,418,133 | — |
| Courts Administration Service | Federal | 12 | $330,268 | 1 |
| City of Toronto — Toronto Water | Municipal | 9 | $3,539,586 | — |
| City of Toronto — Solid Waste Management Services | Municipal | 7 | $18,398,122 | — |
| City of Toronto — Parks, Forestry & Recreation | Municipal | 7 | $10,364,243 | — |
| National Gallery of Canada | Federal | 6 | $1,173,644 | — |
| Natural Sciences and Engineering Research Council of Canada | Federal | 6 | $98,282 | 1 |
| City of Toronto — Transportation Services | Municipal | 6 | $4,499,630 | — |
| Canadian Grain Commission | Federal | 6 | $593,746 | — |
| Immigration and Refugee Board of Canada | Federal | 5 | $323,471 | 1 |
| Canada Energy Regulator | Federal | 5 | $330,201 | — |
| City of Toronto — Long-Term Care Homes & Services | Municipal | 5 | $397,961 | — |
| Crown-Indigenous Relations and Northern Affairs Canada | Federal | 5 | $769,444 | — |
| Peel Region | Municipal | 5 | $812,505 | — |
| Public Prosecution Service of Canada | Federal | 5 | $2,217,985 | — |
| City of Toronto — Real Estate Services | Municipal | 4 | $1,720,150 | — |
| Cornwall | Municipal | 4 | $208,477 | 6 |
| City of Toronto — Corporate Real Estate Management | Municipal | 4 | $3,173,372 | — |
| Foreign Affairs, Trade And Development (Department Of) | Federal | 4 | $648,845 | 9 |
| Elections Canada | Federal | 4 | $874,012 | — |
| Lambton County | Municipal | 4 | $331,441 | 5 |
| Financial Transactions and Reports Analysis Centre of Canada | Federal | 3 | $70,331 | — |
| City of Toronto — Facilities Management | Municipal | 3 | $2,245,859 | — |
| Greater Sudbury | Municipal | 3 | $1,649,061 | 13 |
| Office of the Superintendent of Financial Institutions Canada | Federal | 3 | $211,635 | 2 |
| Hwcdsb | School board | 3 | — | 1 |
| City of Hamilton | Municipal | 3 | $114,000 | — |
| Ocdsb | School board | 3 | — | 4 |
| City of Toronto — Shelter, Support & Housing Administration | Municipal | 3 | $1,006,250 | — |
| City of Toronto — Fleet Services | Municipal | 3 | $396,518 | — |
| Shared Services Canada | Federal | 3 | $70,724 | 14 |
| Library and Archives Canada | Federal | 2 | $163,044 | — |
| City of Toronto — Municipal Licensing & Standards | Municipal | 2 | $279,843 | — |
| Chatham-Kent | Municipal | 2 | $92,615 | 10 |
| Wrdsb | School board | 2 | — | 6 |
| City of Mississauga | Municipal | 2 | $96,000 | 10 |
| Marine Atlantic | Crown corp | 2 | — | — |
| City of Toronto — Facilities Design & Construction | Municipal | 2 | $506,815 | — |
| Vaughan | Municipal | 2 | $3,941,491 | 17 |
| The National Battlefields Commission | Federal | 2 | $46,823 | — |
| Peterborough | Municipal | 2 | — | 8 |
| Brampton | Municipal | 2 | $176,400 | 9 |
| City of Toronto — Seniors Services And Long-Term Care | Municipal | 2 | $9,706,560 | — |
| Midland | Municipal | 2 | — | 1 |
| Canada Lands Company CLC Limited - (CN Tower) | Crown corp | 2 | $5,516,441 | — |
| City of Toronto — Purchasing & Materials Management | Municipal | 2 | $512,862 | — |
| Oshawa | Municipal | 1 | $296,840 | 11 |
| City of Ottawa | Municipal | 1 | $85,200 | 34 |
| York | Municipal | 1 | $89,705 | 23 |
| Lakeshore | Municipal | 1 | — | 1 |
| National Capital Commission | Federal | 1 | $314,829 | 2 |
| Kitchener | Municipal | 1 | $129,238 | 3 |
| Milton | Municipal | 1 | — | 1 |
| Department of Agriculture and Agri-Food (AAFC) | Federal | 1 | $2,066,341 | 6 |
| Kawartha Lakes | Municipal | 1 | — | 3 |
| Oakville | Municipal | 1 | $100,000 | 17 |
| Stratford | Municipal | 1 | — | 1 |
| Employment and Social Development Canada | Federal | 1 | $15,666 | 5 |
| Statistics Canada | Federal | 1 | $10,782 | 2 |
| Elgin County | Municipal | 1 | $248,584 | 1 |
| Dufferin County | Municipal | 1 | $262,470 | 5 |
| Hamilton | Municipal | 1 | $62,295 | 9 |
| Brantford | Municipal | 1 | $149,874 | 10 |
| Whitby | Municipal | 1 | $105,580 | 2 |
| Durham Region | Municipal | 1 | $34,800 | 17 |
| Sarnia | Municipal | 1 | $103,395 | 3 |
| Region of Waterloo | Municipal | 1 | $111,352 | 11 |
| Canada Lands Company CLC Limited | Crown corp | 1 | $1,642,800 | 1 |
| Oxford County | Municipal | 1 | $2,590,046 | 3 |
| City of Toronto | Municipal | 1 | $109,200 | 82 |
| Tecumseh | Municipal | 1 | $360,050 | 5 |
| Halton Region | Municipal | 1 | $49,200 | 23 |
| TDSB | School board | 1 | $36,000 | 15 |
| Hamilton Health Sciences | Hospital | 1 | $57,600 | 5 |
| Niagara Region | Municipal | 1 | $62,330 | 25 |
| Stantec | — | 0 | — | 1 |
| Conseil des Écoles Catholiques du Centre-Est | School board | 0 | — | 3 |