| PREP 1066391 · TMA579377 | THE COLLEGE OF PHYSICIANS AND SURGEONS OF ONTARIO | 42 Science | Registered | 2003 |
| PREP 0557683 · TMA334024 · design | Racine International, LLC | 5 Pharmaceuticals | Registered | 1987 |
| PREP 0498163 · TMA294930 | an individual | 41 Education | Registered | 1984 |
| PREP 0919262 · design | Owner not shown | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2009 |
| M-PREP 1885543 · TMA1101769 | MERIDIAN BIOSCIENCE, INC. | 5 Pharmaceuticals9 Electronics10 Medical | Registered | 2021 |
| LA PREP 1491181 · TMA804331 · design | SETH COMMERCIAL CORPORATION | 7 Machines11 Lighting16 Paper+6 | Registered | 2011 |
| LA PREP 1490207 · TMA804182 | SETH COMMERCIAL CORPORATION | 7 Machines11 Lighting16 Paper+6 | Registered | 2011 |
| PREP ZT 1248697 · TMA735899 | ACH Food Companies, Inc. (a Delaware Corporation) | 29 Meat | Registered | 2009 |
| AMZ PREP 1936766 · TMA1147262 | an individual | 16 Paper35 Advertising39 Transport+3 | Registered | 2022 |
| IVY PREP 1573718 · TMA854635 | Agenda Garment, LLC | 25 Clothing | Registered | 2013 |
| PREP-ALL 1438456 · TMA766530 | W.M. Barr & Company, Inc. (a Tennessee corporation) | 3 Cosmetics | Registered | 2010 |
| PREP.COM 1024495 · TMA546924 | an individual | 16 Paper41 Education | Registered | 2001 |
| 410-PREP 0803480 · TMA477773 | an individual | 9 Electronics16 Paper41 Education | Registered | 1997 |
| 923-PREP 0734006 · TMA456762 | an individual | 9 Electronics16 Paper41 Education | Registered | 1996 |
| PREP HAIR 1926184 · TMA1106653 | Prep Hair Inc. | 44 Medical | Registered | 2021 |
| TECH PREP 1812614 · TMA1064115 | an individual | 25 Clothing | Registered | 2019 |
| QWIK PREP 1792646 · TMA996215 | Rodda Paint Co. | 2 Paints | Registered | 2018 |
| TECH / PREP 1769229 · TMA1039073 · design | Meta Platforms, Inc. | 35 Advertising38 Telecommunications41 Education+1 | Registered | 2019 |
| PREP CHEF 1759047 · TMA997088 | Star Produce Ltd. | 31 Fresh | Registered | 2018 |
| PREP TECH 1758986 · TMA988978 | LABORATOIRES BODYCAD INC. | 10 Medical42 Science44 Medical | Registered | 2018 |
| PERI-PREP 1508900 · TMA853657 | Salts Healthcare Limited | 3 Cosmetics5 Pharmaceuticals | Registered | 2013 |
| BONA PREP 1494507 · TMA836695 | BONA AB, a corporation organized under the laws of Sweden | 3 Cosmetics | Registered | 2012 |
| PREP-CIPE 1352542 · TMA773019 | Pattison Food Group Ltd. | 16 Paper35 Advertising | Registered | 2010 |
| BABY PREP 1300674 · TMA683410 | an individual | 41 Education | Registered | 2007 |
| PURE PREP 1250722 · TMA659490 | LLOYDS LABORATORIES INC. | 3 Cosmetics | Registered | 2006 |