| Police | Not Profit, library | laval.ca |
| Pominville | Architects | — |
| Porte-Folios Communication Inc. | Tout Entreprises et services | calendriers-pfc.ca |
| pose dongle | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Pose ongle re-marquable Salon de beauté | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Pose Rallonges Cheveux | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| POSGroup Montréal | Commercial Kitchen Equipment | facebook.com |
| Poulet Rouge | Cardboard | locations.poulet-rouge.ca |
| Poulin & Bureau | Roofing | pj.ca |
| Poupart Lussier Labelle, CPA | Tout Entreprises et services | ltml.ca |
| Pour Lumen | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Praim Inc | Computer Accessories & Supplies | — |
| Prana Masso | Massage Therapy | pranamasso.com |
| PRANDEKAS, STELLA | Lawyers, Professionals | bbpavocats.com |
| Praxair | Carbon Dioxide | praxair.ca |
| Praxair | Carbon Dioxide | praxair.com |
| Premier Consultant En Location De Véhicules Inc | Car Leasing | — |
| Premiummtl Limousine | Airport Transportation Service | premiummtl.com |
| Prillos | Furniture Stores | prillo.ca |
| Primotex Inc | Tout Entreprises et services | primotexinc.com |
| Princess Auto | Abrasives | princessauto.com |
| Princess Auto (Laval) | Generators | — |
| Pro Clean | Cleaning Services, Cleaning Service | proclean-inc.ca |
| Pro Doc Ltée | Life Sciences and Health Technologies (LSHT) | prodoc.qc.ca |
| Pro Elite Gazon | Landscaping | facebook.com |
| Proax Technologies Ltd | Automation Systems & Equipment | — |
| Procter & Gamble Inc | Life Sciences and Health Technologies (LSHT) | pg.com |
| Productions ICM Inc | Audiovisual Production Services | — |
| Productions Jeunesse | Advertising Agencies | facebook.com |
| Produits Alimentaires Viau Inc. (Les) | Agri-food | viausila.com |
| Produits De Sante Audessa Inc | Shopping Mall | facebook.com |
| Produits Lion Inc | Shopping Mall | facebook.com |
| Produits Ménagers Freudenberg Inc | Life Sciences and Health Technologies (LSHT) | vileda.ca |
| Profil Expositions Inc. | Tout Entreprises et services | profilexpositions.com |
| Profil Santé Diététistes | Tout Commerces au détail | profilsante.qc.ca |
| Project One | Landscaping | facebook.com |
| ProMetic Sciences De La Vie Inc. | Life Sciences and Health Technologies (LSHT) | prometic.com |
| Pronautix Design | Boat Repair & Maintenance | facebook.com |
| Protection Incendie Aqua-Feu Inc | Automatic Fire Sprinkler Systems | facebook.com |
| Protection Incendie Ideal Inc | Automatic Fire Sprinkler Systems | piideal.com |
| ProteoCell Biotechnologies inc. | Life Sciences and Health Technologies (LSHT) | proteocell.com |
| Proxim - Pharmacie Alaria Chamoun inc. | Pharmacy | groupeproxim.ca |
| Proxim Mathieu Duchesne | Pharmacy | groupeproxim.ca |
| Proxim pharmacie affiliée - Fady Thomas et John Thomas | Pharmacy | groupeproxim.ca |
| Proxim pharmacie affiliée - Fatima Zahra Ettadili | Pharmacy | groupeproxim.ca |
| Proxim pharmacie affiliée - Leen Alghazal Pharmacienne Inc. | Pharmacy | groupeproxim.ca |
| Proxim pharmacie affiliée - Levon Benohanian et Hagop Kachichian Inc | Pharmacy | groupeproxim.ca |
| Proxim pharmacie affiliée - P. Lapointe, N. Sévigny | Pharmacy | groupeproxim.ca |
| Proxim pharmacie affiliée - Samia Ould Braham | Pharmacy | groupeproxim.ca |
| Proximed Affiliated Pharmacy - Pierre Bergeron | Pharmacy | groupeproxim.ca |
