| Xtrainerz 2005598 · TMA1131077 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2022 |
| Xtrainerz 1999551 · TMA1137292 | SHOKZ (SINGAPORE) PTE. LTD. | 9 Electronics | Registered | 2022 |
| XTRANDS+ 1761217 · TMA971661 | HAIR CLUB FOR MEN LTD. INC. a Florida corporation | 44 Medical | Registered | 2017 |
| XTRANDS 1761212 · TMA967821 | HAIR CLUB FOR MEN LTD. INC. a Florida corporation | 44 Medical | Registered | 2017 |
| XTRONS 1627087 · TMA896913 · design | UG Electronics Limited | 9 Electronics12 Vehicles | Registered | 2015 |
| XTRINSIC 1485966 · TMA878462 | NXP USA Inc. | 9 Electronics | Registered | 2014 |
| XTREAMPOWER 1634709 · TMA917845 | THE REYNOLDS AND REYNOLDS COMPANY | 9 Electronics42 Science | Registered | 2015 |
| XTREAMSALES 1634705 · TMA918374 | THE REYNOLDS AND REYNOLDS COMPANY | 9 Electronics42 Science | Registered | 2015 |
| XTREMTEC 2264719 · TMA1284885 · design | J2 International Group Limited | 9 Electronics | Registered | 2025 |
| Xtremarz 2236010 · TMA1256824 | ALIF IMPEX LLC | 10 Medical | Registered | 2024 |
| XTREMEAXIS 2226141 · TMA1250230 · design | Xtremeaxis Inc. | 37 Construction42 Science | Registered | 2024 |
| XTREME 2154758 · TMA1192166 · design | TATLAB Corporation | 2 Paints | Registered | 2023 |
| XTREMAQUA 2120956 · TMA1207433 | DART INDUSTRIES INC. | 21 Housewares | Registered | 2023 |
| XTRAIM 2111425 · TMA1229271 | an individual | 9 Electronics13 Firearms | Registered | 2024 |
| XSTREAM 2058493 · TMA1154163 | an individual | 7 Machines | Registered | 2022 |
| XTREME 2053415 · TMA1224926 | Xtreme Manufacturing, LLC | 7 Machines12 Vehicles | Registered | 2024 |
| XTREMEGRIP!! 2015993 · TMA1153963 | KINCO, LLC | 21 Housewares | Registered | 2022 |
| XTREND 2003102 · TMA1128362 · design | HeNan Jintang Trading Co. Ltd. | 26 Sewing | Registered | 2022 |
| XTROMBIA 1985441 · TMA1247731 | an individual | 5 Pharmaceuticals | Registered | 2024 |
| XTRON 1975655 · TMA1149990 | an individual | 5 Pharmaceuticals | Registered | 2022 |
| Xtreme 1963097 · TMA1146306 | Xtreme Wear Parts Inc | 7 Machines | Registered | 2022 |
| XYTRON 1901666 · TMA1123862 | an individual | 1 Chemicals17 Rubber | Registered | 2022 |
| XTREME 1898604 · TMA1096748 · design | A. K. TRADERS LTD. | 9 Electronics25 Clothing34 Tobacco | Registered | 2021 |
| XTREME 1842774 · TMA1011020 · design | DISTAM INC. | 6 Metal7 Machines9 Electronics+2 | Registered | 2018 |
| XSTREME 1790148 · TMA1016175 | Ecolo Odor Control Technologies Inc. | 5 Pharmaceuticals11 Lighting | Registered | 2019 |