| BAD TESTING 1891890 · TMA1070504 | Bad Testing LLC | 42 Science | Registered | 2020 |
| PQA TESTING 1413010 · TMA753059 | Professional Quality Assurance Inc. | 42 Science | Registered | 2009 |
| LEFORT TESTING 1845778 · TMA1068518 | an individual | 7 Machines9 Electronics42 Science | Registered | 2020 |
| M METRO TESTING 1928794 · TMA1140841 · design | Metro Testing & Engineering Ltd. | 37 Construction41 Education42 Science | Registered | 2022 |
| WT WELL TESTING 1480188 · TMA802718 · design | an individual | 16 Paper42 Science | Registered | 2011 |
| KAL'S TIRE TESTING 1778197 · TMA968195 | an individual | 35 Advertising37 Construction39 Transport+1 | Registered | 2017 |
| TESTING THE FUTURE 1477131 · TMA796338 | D&V Electronics Ltd. | 9 Electronics42 Science | Registered | 2011 |
| REST INDEX TESTING 2166179 | 14894669 Canada Inc. | 20 Furniture24 Textiles35 Advertising | Pending | 2022 |
| TESTING YOUR LIMITS 2310025 | J-Squared Technologies Inc. | 42 Science | Pending | 2024 |
| SCHOOL TESTING APPROVED 1934925 · TMA1122253 · design | DIXON TICONDEROGA COMPANY. | 2 Paints16 Paper | Registered | 2022 |
| ASHTON TESTING SERVICES 1818785 · TMA1003397 · design | Ashton College Ltd. | 41 Education | Registered | 2018 |
| A ARCHITECTURAL TESTING 1125927 · TMA670871 · design | ARCHITECTURAL TESTING, INC. (a Pennsylvania corporation) | 42 Science | Registered | 2006 |
| RAPID TESTING REINVENTED 1659202 · TMA975329 | MedMira Laboratories Inc. | 1 Chemicals5 Pharmaceuticals9 Electronics+1 | Registered | 2017 |
| P.O.T (Parents on Testing) 1500050 · TMA827148 | an individual | 5 Pharmaceuticals35 Advertising44 Medical | Registered | 2012 |
| CANADA'S TESTING COMPANY 1368233 · TMA743698 | Yardstick Assessment Strategies Inc. | 9 Electronics16 Paper35 Advertising+2 | Registered | 2009 |
| BIOHEALTH TESTING CENTER 2049008 | an individual | 44 Medical | Pending | 2020 |
| METRO TESTING & ENGINEERING 1929589 · TMA1153447 | Metro Testing & Engineering Ltd. | 37 Construction41 Education42 Science | Registered | 2022 |
| INTERTEK TESTING SERVICES 0855409 · TMA506572 | INTERTEK TESTING SERVICES NA LTD./ SERVICES D'ESSAIS INTERTEK AN LTÉE | 35 Advertising36 Finance37 Construction+2 | Registered | 1999 |
| CREATIVE TESTING SOLUTIONS 2356249 · design | an individual | 42 Science44 Medical | Pending | 2024 |
| LSAC DIGITAL TESTING SYSTEM 1737990 · TMA1033641 | LAW SCHOOL ADMISSION COUNCIL, INC. | 9 Electronics41 Education | Registered | 2019 |
| EDUCATIONAL TESTING SERVICE 0712168 · TMA458226 | an individual | 9 Electronics16 Paper35 Advertising+3 | Registered | 1996 |
| M METRO TESTING + ENGINEERING 2275357 · design | Owner not listed | 37 Construction42 Science | Pending | 2023 |
| MICROSOFT PLAYWRIGHT TESTING 2275471 | Owner not listed | 9 Electronics42 Science | Pending | 2023 |
| CALA TESTING ACCREDITATION NO. 2023653 · TMA1265050 · design | Canadian Association for Laboratory Accreditation Inc. (CALA) | 42 Science | Registered | 2024 |
| TST TECHNICAL SYSTEMS TESTING 1481617 · TMA807194 | Gaming Laboratories International, LLC | 42 Science | Registered | 2011 |