| METERCOR 1491709 · TMA839736 | Metercor Inc. | 6 Metal9 Electronics17 Rubber+4 | Registered | 2013 |
| MOTORSTOR 0357770 · TMA191774 | DAUBERT CHEMICAL COMPANY, INC. (an Illinois Corporation) | 2 Paints | Registered | 1973 |
| MetersGod 2283389 | Shenzhen Juxing Trading Co. Ltd | 20 Furniture | Pending | 2023 |
| METRISTORE 1931198 · TMA1124795 | Oxford Nanopore Technologies Limited | 35 Advertising42 Science44 Medical | Registered | 2022 |
| METERS 1801038 · TMA1075123 | Meters Music LLC | 9 Electronics | Registered | 2020 |
| MEDeRECORD 1258942 · TMA711717 | RSRS - Record Storage & Retrieval Services Inc. | 9 Electronics | Registered | 2008 |
| METRICO 2108408 · TMA1242338 · design | an individual | 25 Clothing | Registered | 2024 |
| METERYX 2070750 · TMA1282215 | an individual | 9 Electronics42 Science | Registered | 2025 |
| METRICHOR 1655430 · TMA996599 | Oxford Nanopore Technologies Limited | 35 Advertising42 Science44 Medical | Registered | 2018 |
| METRICON 1298467 · TMA707147 | an individual | 7 Machines37 Construction | Registered | 2008 |
| METORICO 2371244 | Dongguan Rongyu Outdoor Products Co. Ltd. | 11 Lighting | Pending | 2024 |
| METROGO!! 2271046 · design | METRO INC. | 21 Housewares29 Meat30 Coffee+2 | Pending | 2023 |
| METROGO!! 2260669 · design | METRO INC. | 21 Housewares29 Meat30 Coffee+2 | Pending | 2023 |
| METROGO!! 2256513 | Owner not listed | 21 Housewares29 Meat30 Coffee+2 | Pending | 2023 |
| MATERECO 2208233 · design | KOMATSU MATERE Co. Ltd. | 17 Rubber18 Leather22 Ropes+4 | Pending | 2021 |
| MATERECO 2208232 · design | KOMATSU MATERE Co. Ltd. | 17 Rubber18 Leather22 Ropes+4 | Pending | 2021 |
| METEORS 2197166 | an individual | 3 Cosmetics9 Electronics14 Jewellery+11 | Pending | 2022 |
| METERGY 2084574 | METERGY SOLUTIONS INC. | 9 Electronics35 Advertising37 Construction+1 | Pending | 2021 |
| MyTractor 2030436 | an individual | 35 Advertising | Pending | 2020 |
| MOTHERSHIP 1914068 · TMA1102851 | Pat McGrath Cosmetics LLC | 3 Cosmetics | Registered | 2021 |
| MOTHERSHIP 1903912 · TMA1161723 | Mothership Agency Inc. | 35 Advertising41 Education42 Science | Registered | 2023 |
| MOTHERSHIP 1815320 · TMA1015693 | Mothership Glass LLC, a Washington State Corporation | 16 Paper18 Leather20 Furniture+6 | Registered | 2019 |
| MOTHERSHIP 1784891 · TMA979208 · design | Mothership Glass LLC, a Washington State Corporation | 21 Housewares34 Tobacco | Registered | 2017 |
| MOTHERSHIP 1784889 · TMA977218 | Mothership Glass LLC, a Washington State Corporation | 21 Housewares34 Tobacco | Registered | 2017 |
| MOTORSAVER 1778097 · TMA1002334 | LITTELFUSE, INC. | 9 Electronics | Registered | 2018 |