| MASTERCOIN 1635453 · TMA886563 | BALCAN INNOVATIONS INC. | 22 Ropes | Registered | 2014 |
| MASTERTINT 0722282 · TMA432763 | Axalta Coating Systems GmbH | 1 Chemicals2 Paints3 Cosmetics | Registered | 1994 |
| MASTERSHIFT 2197164 · TMA1237352 · design | Mastershift Inc. | 42 Science | Registered | 2024 |
| MASTERBUILT 2151190 · TMA1226050 | Masterbuilt Manufacturing, LLC | 4 Oils9 Electronics11 Lighting+1 | Registered | 2024 |
| MasterFit 2069039 · TMA1158318 | Yiwu Zhaoen Sports Goods Co. Ltd. | 28 Toys | Registered | 2022 |
| MASTERMIND 2067918 · TMA1135817 | Mastery Logistics Systems, Inc. | 42 Science | Registered | 2022 |
| MASTERING 1765479 · TMA1017111 | PEARSON EDUCATION, INC. | 9 Electronics41 Education42 Science | Registered | 2019 |
| MASTERLINE 1623336 · TMA890007 | ES OpCo USA LLC | 5 Pharmaceuticals7 Machines8 Hand+3 | Registered | 2014 |
| MASTERFOIL 1513052 · TMA862873 | BOBST MEX SA | 7 Machines9 Electronics | Registered | 2013 |
| MASTERLINK 1444698 · TMA772786 | Longyear TM, Inc. | 7 Machines | Registered | 2010 |
| MASTERLIFT 1345681 · TMA793832 · design | MASTERLIFT INC. | 7 Machines8 Hand12 Vehicles+3 | Registered | 2011 |
| MASTERLIFT 1345680 · TMA793833 | MASTERLIFT INC. | 7 Machines8 Hand12 Vehicles+3 | Registered | 2011 |
| MASTERLINE 1300008 · TMA753125 | BEAULIEU GROUP, LLC | 27 Carpets | Registered | 2009 |
| MASTERBUILT 1205154 · TMA632340 | Jayman Built Ltd. | 37 Construction | Registered | 2005 |
| MASTERMIND 1010294 · TMA725342 | MASTERMIND TOYS INC. | 35 Advertising | Registered | 2008 |
| MASTERMIND 0875302 · TMA612504 | HASBRO , INC., A RHODE ISLAND CORPORATION | 9 Electronics28 Toys | Registered | 2004 |
| 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 |
| MASTERCOAT 2340235 | Owner not listed | 19 Building | Pending | 2024 |
| MASTERMIND 2328422 | The Youth Effect Inc. | – | Pending | 2024 |
| MasterShine 2272892 | Owner not listed | 37 Construction | Pending | 2023 |
| MASTERCONNECT 1933965 · TMA1139988 | an individual | 11 Lighting | Registered | 2022 |
| MASTERMOMENTS 1355537 · TMA729412 | SERVICEMASTER CLEAN/RESTORE SPE LLC | 35 Advertising | Registered | 2008 |