United Way Centraide Canada would like to acknowledge the following corporations, public sector partners, labour organizations and their employees or members as 2021 Thanks a Million recipients. This title goes to companies and unions whose corporate and employee and/or member giving helped to raise more than $1 million in support of United Way Centraides  work in local communities. Thank you for your leadership in supporting the United Way movement to build stronger, more vibrant, and more inclusive places to live for all Canadians.
| 407 ETR | Amalgamated Transit Union (ATU) | Association of Management, Administrative and Professional Crown Employees |
| Bell | Blakes | BMO Financial Group |
| Brookfield | CAE | Canada Life |
| Canadian Federation of Nurses Union and its member organizations (CFNU) | Canadian Labour Congress (CLC) | Canadian Natural Resources Limited |
| Canadian Office and Professional Employees Union (COPE) | Canadian Union of Public Employees (CUPE) | Canso Investment Counsel Ltd. |
| Caisse de dépôt et placement du Québec | CIBC | City of Toronto |
| City of Toronto Administrative, Professional and Supervisory Association Inc. | Costco Wholesale Canada Ltd. | Desjardins Group |
| Enbridge | Enbridge Gas Inc. | EY Canada |
| Government of Canada Workplace Charitable Campaign | Government of Québec | Hydro-Québec |
| iA Financial Group | IG Wealth Management | Imperial |
| Intact Financial Corporation | International Association of Fire Fighters (IAFF) | International Association of Machinists and Aerospace Workers (IAM&AW) |
| International Brotherhood of Electrical Workers (IBEW) | James Richardson & Sons, Limited and Affiliated Companies | KPMG LLP |
| LCBO (Liquor Control Board of Ontario) | Manulife | McCarthy Tétrault |
| METRO INC. | National Bank | National Bank Financial Markets |
| National Union of Public and General Employees and its component unions (NUPGE) | Ontario Public Service | Ontario Public Service Employees Union (OPSEU) |
| Osler, Hoskin & Harcourt LLP | PCL | Pembina Pipeline Corporation |
| Polar Asset Management Partners | Power Corporation of Canada | Pratt & Whitney Canada |
| Procter & Gamble Inc. | Public Service Alliance of Canada (PSAC) | PwC |
| RBC | Saputo | Scotiabank |
| Service Employees International Union (SEIU) | Shell Canada Limited | Sun Life |
| Syncrude | TD Bank Group | TransAlta Corporation |
| The Professional Institute of the Public Service of Canada | Unifor Canada | UNITE HERE |
| United Food and Commercial Workers International Union (UFCW) | United Steelworkers (USW) | United Way Centraide |
| UPS Canada/UPS-SCS | Ville de Montréal | Wawanesa Mutual Insurance Company |