| Phantom Cables | Ontario |
| Phantom Compass | Ontario |
| Phantom Photonics, Inc. | |
| Pharmabio Développement | |
| PharmAchieve Corporation Ltd | |
| PharmAla Biotech | |
| PharmaTher Holdings Ltd | |
| Phase 1 systems | British Columbia |
| Phase 2 Consulting | British Columbia |
| Phase II Office Essentials, Inc. | British Columbia |
| Phaselock Systems International, Inc. | Ontario |
| Phaseshift Technologies, Inc. | |
| Phason, Inc. | Manitoba |
| Phasor Electronics Design | British Columbia |
| PheasanTech | |
| Phelix AI | |
| PHEMI Systems Corporation | British Columbia |
| Phenomena Technologies, Inc. | Ontario |
| Phenomic | Ontario |
| PhenoTips | |
| PhesanTech | |
| Phibian Technologies, Inc. | Ontario |
| Phidgets, Inc. | Alberta |
| Phil Communications | Quebec |
| Phil Kneer | British Columbia |
| Philippe Mercure | |
| Phillips Web Design | Ontario |
| Phimata | |
| Phipps Dickson Integria, Inc. | Quebec |
| Phlik Marketing | Quebec |
| Phoenix Agency | Ontario |
| Phoenix Antenna Systems | Ontario |
| Phoenix Computers | British Columbia |
| Phoenix Contact Ltd | Ontario |
| Phoenix Digital Health, Inc. | |
| Phoenix Gate Studio | Ontario |
| Phoenix Group | |
| Phoenix Labs | |
| Phoenix Systems | Ontario |
| Phoenix Technology Services | |
| Phoenix Wise Solutions | |
| Phoenixx | Quebec |
| Phoenixx | |
| Pholoho Biotechnology Group | |
| Phone Co, Inc. | Alberta |
| PhoneTech | Newfoundland and Labrador |
| PhotoDynamic, Inc. | |
| PhotoModeler Technologies | British Columbia |
| Photon etc. | |
| Photonic, Inc. | |