| Peterborough Community Health Centre | Other Public Sector Employers | 2025 | 2 | $121,173 |
| Peterborough County Board of Education | School Boards | 1997 | 3 | $102,244 |
| Peterborough County-City Health Unit | Hospitals & Boards of Public Health | 2024 | 17 | $132,639 |
| Peterborough County-City Hlth Unit | Hospitals & Boards of Public Health | 2004 | 1 | $175,257 |
| Peterborough Family Health Team | Other Public Sector Employers | 2023 | 14 | $123,945 |
| Peterborough Family Resource Centre | Other Public Sector Employers | 2018 | 1 | $100,767 |
| Peterborough Regional Health Centre | Hospitals & Boards of Public Health | 2025 | 736 | $120,562 |
| Peterborough Victoria Northumberland & Clarington R.C.S.S.B. | School Boards | 1996 | 1 | $111,604 |
| Peterborough Victoria Northumberland and Clarington Catholic District School Board | School Boards | 2025 | 743 | $122,061 |
| Peterborough Youth Services | Other Public Sector Employers | 2025 | 1 | $115,000 |
| PHARA - Physically Handicapped Adults Rehabilitation Assoc | Other Public Sector Employers | 2023 | 1 | $124,983 |
| Phara Community Services | Other Public Sector Employers | 2025 | 1 | $133,824 |
| Phara Westwinds Heights | Other Public Sector Employers | 2021 | 1 | $108,642 |
| PHB | Hospitals & Boards of Public Health | 2005 | 1 | $167,636 |
| Philip Aziz Centre for Hospice Care | Other Public Sector Employers | 2025 | 4 | $124,471 |
| Phoenix Centre for Children and Families | Other Public Sector Employers | 2015 | 2 | $111,851 |
| Phoenix Wholistic Health Centre | Other Public Sector Employers | 2009 | 1 | $100,479 |
| Photonics Research Ontario | Other Public Sector Employers | 2003 | 2 | $139,646 |
| PHSS Support Services | Other Public Sector Employers | 2025 | 4 | $134,338 |
| Physicians Services’ Incorporated Foundation | Other Public Sector Employers | 2016 | 1 | $127,357 |
| Pic Mobert First Nation | Other Public Sector Employers | 2025 | 10 | $121,997 |
| Pikangikum First Nation | Other Public Sector Employers | 2025 | 58 | $120,629 |
| Pilot Place Society | Other Public Sector Employers | 2025 | 1 | $102,228 |
| Pinball Clemons Foundation | Other Public Sector Employers | 2024 | 3 | $128,795 |
| Pine River Institute | Other Public Sector Employers | 2025 | 8 | $147,681 |
| Pinecrest-Queensway CHC | Other Public Sector Employers | 2005 | 3 | $115,919 |
| Pinecrest-Queensway Community Health Centre | Other Public Sector Employers | 2025 | 30 | $147,000 |
| Pinecrest-Queensway HCS | Other Public Sector Employers | 1999 | 1 | $101,757 |
| Pinecrest-Queensway Health & Community Services | Other Public Sector Employers | 2007 | 2 | $159,449 |
| Pinecrest-Queensway Hlth. & Comm. Srvcs | Other Public Sector Employers | 2004 | 2 | $106,731 |
| Pinnguaq Association | Other Public Sector Employers | 2021 | 2 | $124,795 |
| Plainfield Community Homes | Other Public Sector Employers | 2013 | 1 | $133,081 |
| Planned Parenthood Toronto | Other Public Sector Employers | 2025 | 7 | $153,421 |
| Plantagenet Family Health Team Inc | Other Public Sector Employers | 2023 | 1 | $108,091 |
| Pleasant Manor Retirement Village | Other Public Sector Employers | 2025 | 7 | $125,046 |
| Plexxus | Other Public Sector Employers | 2008 | 7 | $185,731 |
| Plug N Drive Coalition of Ontario (O/A Plug N Drive) | Other Public Sector Employers | 2018 | 1 | $126,308 |
| Point in Time Centre for Children Youth and Parents | Other Public Sector Employers | 2025 | 2 | $127,109 |
| Points North Family Health Team | Other Public Sector Employers | 2022 | 1 | $134,832 |
| Police Association of Ontario | Other Public Sector Employers | 2025 | 2 | $188,961 |
| Police Services Brd. | Other Public Sector Employers | 1999 | 1 | $104,299 |
| Pollution Probe Foundation | Other Public Sector Employers | 2017 | 1 | $143,750 |
| Polycultural Immigrant and Community Services | Other Public Sector Employers | 2024 | 7 | $126,493 |
| Porcupine & District C.A.S. | Other Public Sector Employers | 1999 | 1 | $114,061 |
| Port Colborne General Hospital | Hospitals & Boards of Public Health | 1999 | 1 | $108,451 |
| Portage Medical Family Health Team | Other Public Sector Employers | 2023 | 1 | $146,898 |
| Portage Program for Drug Dependencies Inc. | Other Public Sector Employers | 2024 | 1 | $108,859 |
| Portage Program for Drug Dependencies Inc. (Portage Ontario) | Other Public Sector Employers | 2011 | 1 | $107,650 |
| Portage Program Ontario | Other Public Sector Employers | 2023 | 1 | $100,428 |
| Positive Living Niagara | Other Public Sector Employers | 2025 | 3 | $106,358 |
| Postsecondary Ed. Review Secretariat | Crown Agencies | 2004 | 2 | $121,691 |
| Powassan and Area Family Health Team | Other Public Sector Employers | 2023 | 1 | $103,878 |
| PowerON Energy Solutions | Ontario Power Generation | 2025 | 46 | $139,736 |
| Prescott Family Health Team | Other Public Sector Employers | 2020 | 1 | $111,694 |
| Prescott-Russell CdESCLF | School Boards | 1997 | 1 | $110,000 |
| Prescott-Russell Children's Aid Soc. | Other Public Sector Employers | 2001 | 1 | $113,327 |
| Prescott-Russell County BE | School Boards | 1997 | 1 | $105,320 |
| Prescott-Russell County Board of Education | School Boards | 1996 | 1 | $103,680 |
| Prevention Link | Other Public Sector Employers | 2019 | 1 | $114,111 |
| Pride Ball Toronto | Other Public Sector Employers | 2018 | 1 | $130,000 |
| Pride Toronto | Other Public Sector Employers | 2021 | 1 | $132,349 |
| Prima Care Community Family Health Team | Other Public Sector Employers | 2023 | 2 | $112,064 |
| Prime Care Family Health Team | Other Public Sector Employers | 2023 | 2 | $112,903 |
| Prince Edward County Board of Education | School Boards | 1997 | 1 | $101,648 |
| Prince Edward County Community Care for Seniors Association | Other Public Sector Employers | 2025 | 1 | $117,919 |
| Prince Edward Family Health Team | Other Public Sector Employers | 2023 | 4 | $121,331 |
| Prince Edward Learning Centre | Other Public Sector Employers | 2025 | 1 | $102,941 |
| Princess Margaret Hospital | Hospitals & Boards of Public Health | 1997 | 44 | $136,714 |
| Prison Fellowship of Canada | Other Public Sector Employers | 2023 | 2 | $123,934 |
| Prisoners With HIV/AIDS Support Action Network | Other Public Sector Employers | 2025 | 1 | $108,753 |
| PROcure Healthcare | Other Public Sector Employers | 2012 | 3 | $126,378 |
| Progress Career Planning Institute | Other Public Sector Employers | 2024 | 1 | $208,063 |
| Progress Place | Other Public Sector Employers | 2016 | 1 | $101,782 |
| Progress Place Rehabilitation Centre | Other Public Sector Employers | 2014 | 1 | $102,614 |
| Progress Place Rehabilitation Centre (Metropolitan Toronto) Inc | Other Public Sector Employers | 2025 | 1 | $129,981 |
| Project Hostel | Other Public Sector Employers | 2025 | 4 | $129,239 |
| Project Hostel o / a Yellow Brick House | Other Public Sector Employers | 2014 | 1 | $123,453 |
| Project Hostel o/a Yellow Brick House | Other Public Sector Employers | 2016 | 1 | $124,687 |
| Project Hostel operating as Yellow Brick House | Other Public Sector Employers | 2013 | 1 | $118,211 |
| Project Hostel, Yellow Brick House | Other Public Sector Employers | 2008 | 1 | $101,769 |
| Prospectors and Developers Association of Canada Mining Matters | Other Public Sector Employers | 2024 | 1 | $115,454 |
| Prosper Canada | Other Public Sector Employers | 2023 | 6 | $132,648 |
| Prosserman Jewish Community Centre | Other Public Sector Employers | 2025 | 1 | $104,617 |
| Protestant Separate Sch Bd, Town of Penetanguishene | School Boards | 2010 | 1 | $105,359 |
| Protestant Separate School Board | School Boards | 2016 | 1 | $113,969 |
| Protestant Separate School Board of the Town of Penetanguishene | School Boards | 2013 | 1 | $117,009 |
| Prov Bldg & Constr. Trades Council, Ont | Other Public Sector Employers | 2005 | 1 | $121,622 |
| Prov. Bld. & Const. Trds Coun. of Ont. | Other Public Sector Employers | 2001 | 1 | $100,838 |
| Prov. Build. & Con. Trad. Co. of Ont. | Other Public Sector Employers | 2002 | 1 | $110,519 |
| Providence Care Centre | Hospitals & Boards of Public Health | 2025 | 329 | $131,052 |
| Providence Centre | Hospitals & Boards of Public Health | 2002 | 3 | $186,240 |
| Providence Healthcare | Hospitals & Boards of Public Health | 2016 | 42 | $131,634 |
| Provincial Advocate | Government of Ontario – Legislative Assembly and Offices | 2019 | 4 | $131,019 |
| Provincial Building and Construction Trades Council Ontario | Other Public Sector Employers | 2025 | 4 | $181,057 |
| Provincial Buliding & Constraction Trades Council, Ont. | Other Public Sector Employers | 2003 | 1 | $110,519 |
| Provincial Land and Development Facilitator | Crown Agencies | 2025 | 2 | $262,600 |
| Provincial Sheet Metal Workers Training Corporation | Other Public Sector Employers | 2025 | 5 | $135,649 |
| Provincial Sport Organizations Council | Other Public Sector Employers | 2022 | 1 | $120,000 |
| Provision the Food Industry Sustainability Coalition | Other Public Sector Employers | 2018 | 1 | $137,380 |
| Psychiatric Survivors of Ottawa-Carleton | Other Public Sector Employers | 2025 | 1 | $101,248 |