| MASTERING 1765479 · TMA1017111 | PEARSON EDUCATION, INC. | 9 Electronics41 Education42 Science | Registered | 2019 |
| MASTERINJECT 1553236 · TMA904240 | an individual | 2 Paints | Registered | 2015 |
| MASTERINDEX 1338946 · TMA714770 | Mastercard International Incorporated | 9 Electronics16 Paper35 Advertising | Registered | 2008 |
| MASTERLINE 16 1767505 · TMA1017160 | NCI GROUP, INC. | 6 Metal | Registered | 2019 |
| MASTERMIND 2067918 · TMA1135817 | Mastery Logistics Systems, Inc. | 42 Science | Registered | 2022 |
| Masteri 1880719 · TMA1061406 | BEYES DENTAL CANADA INC. | 3 Cosmetics5 Pharmaceuticals10 Medical+1 | Registered | 2019 |
| MASTERLINER 1771062 · TMA1030517 | GPCP IP Holdings LLC | 16 Paper | Registered | 2019 |
| MASTERLINE 1623336 · TMA890007 | ES OpCo USA LLC | 5 Pharmaceuticals7 Machines8 Hand+3 | Registered | 2014 |
| MASTERFINISH 1559185 · TMA894277 | Construction Research & Technology GmbH | 1 Chemicals | Registered | 2015 |
| MASTERIS 1496355 · TMA825790 · design | Owner not shown | 12 Vehicles37 Construction39 Transport+1 | Registered | 2012 |
| MASTERLINK 1444698 · TMA772786 | Longyear TM, Inc. | 7 Machines | Registered | 2010 |
| MUSTERRING 1431315 · TMA769920 | an individual | 20 Furniture | Registered | 2010 |
| MASTERLINE 1300008 · TMA753125 | BEAULIEU GROUP, LLC | 27 Carpets | Registered | 2009 |
| MASTERGOLD 1183266 · TMA635355 | an individual | 4 Oils | Registered | 2005 |
| MASTERMIND 1010294 · TMA725342 | MASTERMIND TOYS INC. | 35 Advertising | Registered | 2008 |
| MASTERGRIP 0886528 · TMA555172 | Wells Lamont Industry Group LLC | 9 Electronics | Registered | 2001 |
| MASTERMIND 0875302 · TMA612504 | HASBRO , INC., A RHODE ISLAND CORPORATION | 9 Electronics28 Toys | Registered | 2004 |
| MASTERLIGN 0870610 · TMA519509 | an individual | 7 Machines9 Electronics | Registered | 1999 |
| MASTER 35 0803787 · TMA472504 | Airtec International Limited | 7 Machines10 Medical | Registered | 1997 |
| MASTERTINT 0722282 · TMA432763 | Axalta Coating Systems GmbH | 1 Chemicals2 Paints3 Cosmetics | Registered | 1994 |
| MASTERLEGAL 0649812 · TMA392586 | Mastercard International Incorporated | 35 Advertising45 Legal | Registered | 1992 |
| MASTERMIND 0596468 · TMA349347 | MASTERMIND TOYS INC. | 35 Advertising37 Construction41 Education | Registered | 1988 |
| MASTERMIND 0449171 · TMA270675 | HASBRO , INC., A RHODE ISLAND CORPORATION | 28 Toys | Registered | 1982 |
| MASTERMIND 0412143 · TMA267720 | HASBRO , INC., A RHODE ISLAND CORPORATION | 28 Toys | Registered | 1982 |
| MASTERMIND 0412142 · TMA267719 · design | HASBRO , INC., A RHODE ISLAND CORPORATION | 28 Toys | Registered | 1982 |