| OBIO 1472826 · TMA787193 | an individual | 6 Metal9 Electronics16 Paper+7 | Registered | 2011 |
| OBO 1472430 · TMA855158 | SO GOOD, Société à Responsabilité Limitée | 30 Coffee32 Beer33 Wine | Registered | 2013 |
| OWBO 1441513 · TMA835393 | GA Techneering Pty Ltd. | 8 Hand9 Electronics | Registered | 2012 |
| OBO 1418827 · TMA783386 · design | Outdoor Box Office Ltd. | 35 Advertising41 Education45 Legal | Registered | 2010 |
| OBEO 1400674 · TMA799162 | Obeo, Inc. | 35 Advertising | Registered | 2011 |
| OBIO 2267857 | Owner not listed | 35 Advertising45 Legal | Pending | 2023 |
| OBIO 2219954 | Orchestra BioMed, Inc. | 10 Medical | Pending | 2022 |
| obio 1997906 | Inter Cosmetiques Inc. | 3 Cosmetics5 Pharmaceuticals35 Advertising | Pending | 2019 |
| OhBio 2120283 · TMA1184226 | an individual | 31 Fresh | Registered | 2023 |
| OYHBO 2004817 · TMA1140348 · design | Guangzhou Shengxijie Trading Co. LTD | 34 Tobacco | Registered | 2022 |
| OUBAO 2072477 | KAIPING OUBAO SANITARY WARE HARDWARE CO.,LTD . | 11 Lighting19 Building21 Housewares | Pending | 2020 |
| OBA 2208336 · TMA1228461 · design | Oba Cosmetic (Xiamen) Co. Ltd. | 3 Cosmetics | Registered | 2024 |
| Obuy 2131861 · TMA1225135 | Olight Group Co.Ltd | 9 Electronics35 Advertising | Registered | 2024 |
| OB 2099578 · TMA1222848 · design | NUTIFOOD NUTRITION FOOD JOINT STOCK COMPANY | 5 Pharmaceuticals29 Meat30 Coffee+3 | Registered | 2024 |
| OBI 2096038 · TMA1172658 | EAU ZONE HUILES ET FRAGRANCES LTÉE | 10 Medical | Registered | 2023 |
| OBEY 2062093 · TMA1132880 | Bold Strategies Inc. | 10 Medical | Registered | 2022 |
| OB-4 2056551 · TMA1158174 | an individual | 9 Electronics25 Clothing | Registered | 2022 |
| OPPO 2000849 · TMA1228713 · design | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP. LTD. | 7 Machines11 Lighting36 Finance+1 | Registered | 2024 |
| OPPO 1993596 · TMA1260549 · design | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP. LTD. | 12 Vehicles | Registered | 2024 |
| OIVO 1959381 · TMA1257203 · design | GuangZhou ZhongTianXin Electronic Technology Co.,Ltd. | 9 Electronics | Registered | 2024 |
| OPPO 1943008 · TMA1160627 · design | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP. LTD. | 9 Electronics | Registered | 2023 |
| OPPO 1943007 · TMA1160626 · design | GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP. LTD. | 9 Electronics | Registered | 2023 |
| OB-1 1911765 · TMA1118210 | Deltion Innovations Ltd | 1 Chemicals | Registered | 2022 |
| OEB 1836946 · TMA1008506 | OEB Breakfast Co. Inc. | 29 Meat43 Restaurants | Registered | 2018 |
| OB : 1833108 · TMA1032636 · design | Owner not shown | 3 Cosmetics28 Toys | Registered | 2019 |