| OZAWAVE 2014278 · TMA1112664 | BIOPROJET EUROPE LIMITED | 5 Pharmaceuticals | Registered | 2021 |
| OCCUWAVE 2340760 | Owner not listed | 9 Electronics | Pending | 2024 |
| OXYBEE 1884876 · TMA1091891 · design | an individual | 5 Pharmaceuticals10 Medical35 Advertising | Registered | 2021 |
| OCB 2288384 · TMA1260315 | REPUBLIC TECHNOLOGIES (NA), LLC | 25 Clothing34 Tobacco | Registered | 2024 |
| OSVYO 2277828 · TMA1283491 · design | Shenzhen Hongwangxi Technology Co. Ltd. | 25 Clothing | Registered | 2025 |
| OCB 2276333 · TMA1261995 · design | REPUBLIC TECHNOLOGIES (NA), LLC | 34 Tobacco | Registered | 2024 |
| OCB 2276332 · TMA1261994 | REPUBLIC TECHNOLOGIES (NA), LLC | 34 Tobacco | Registered | 2024 |
| OCB 2276331 · TMA1261993 · design | REPUBLIC TECHNOLOGIES (NA), LLC | 34 Tobacco | Registered | 2024 |
| OCB 2276330 · TMA1261992 · design | REPUBLIC TECHNOLOGIES (NA), LLC | 34 Tobacco | Registered | 2024 |
| OKP 2244476 · TMA1263165 | Owner not listed | 7 Machines | Registered | 2024 |
| OSV 2198564 · TMA1238372 | OSV Professional Corporation | 35 Advertising36 Finance42 Science | Registered | 2024 |
| OGSIVEO 2189447 · TMA1216527 · design | SpringWorks Therapeutics Operating Company, Inc. | 5 Pharmaceuticals | Registered | 2023 |
| Ogsiveo 2179400 · TMA1211325 | SpringWorks Therapeutics Operating Company, Inc. | 5 Pharmaceuticals | Registered | 2023 |
| OGPay 2161048 · TMA1194916 | ORGANO Payments, Inc. | 9 Electronics36 Finance | Registered | 2023 |
| OXBOW 2153798 · TMA1169150 | Nufarm Agriculture Inc. | 5 Pharmaceuticals | Registered | 2023 |
| Ochef 2148981 · TMA1204226 | Shenzhen Obuy Technology Co. Ltd | 8 Hand | Registered | 2023 |
| OSF 2141547 · TMA1241007 | an individual | 6 Metal19 Building | Registered | 2024 |
| OCV 2117919 · TMA1205034 | OCV CONTROL VALVES, LLC | 6 Metal | Registered | 2023 |
| OXBOW 2099898 · TMA1180467 | OXBOW | 25 Clothing | Registered | 2023 |
| OQUEVO 2082129 · TMA1142014 | Mitsubishi Tanabe Pharma Corporation | 5 Pharmaceuticals | Registered | 2022 |
| OISP 1994454 · TMA1181091 | Iothic Ltd | 9 Electronics38 Telecommunications | Registered | 2023 |
| OXVA 1991931 · TMA1108152 | Shenzhen Future Tech Co. Limited | 34 Tobacco | Registered | 2021 |
| Occffy 1954882 · TMA1118769 | an individual | 9 Electronics25 Clothing | Registered | 2022 |
| OJOVY 1934022 · TMA1073647 | Teva Pharmaceutical Industries Ltd. | 5 Pharmaceuticals | Registered | 2020 |
| OQPY 1869840 · TMA1104965 | Owner not shown | 9 Electronics36 Finance37 Construction+1 | Registered | 2021 |