| COSTAR 1905539 · TMA1170448 | Padlokt IP Pty Ltd | 38 Telecommunications41 Education | Registered | 2023 |
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| COSTAR 1714263 · TMA933459 · design | CoStar Realty Information, Inc. | 9 Electronics36 Finance | Registered | 2016 |
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| COSTAR 0871810 · TMA556904 | CoStar Realty Information, Inc. | 35 Advertising36 Finance42 Science | Registered | 2002 |
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| COSTAR 0814985 · TMA478208 · design | QUANTUM GROUP, INC. A CALIFORNIA CORPORATION | 9 Electronics12 Vehicles | Registered | 1997 |
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| COSTAR 0680997 · TMA495408 | THERMO TRILOGY CORPORATION (A DELAWARE CORPORATION) | 5 Pharmaceuticals | Registered | 1998 |
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| COSTAR 0486995 · TMA277487 | CORNING INCORPORATED (A NEW YORK CORPORATION) | 9 Electronics | Registered | 1983 |
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| COSTAR 0486634 · TMA278133 | COSTAR COMPUTER SYSTEMS LTD. | 9 Electronics | Registered | 1983 |
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| CoStAR 2260621 | INSTIL BIO, INC. | 5 Pharmaceuticals40 Treatment41 Education | Pending | 2023 |
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| CASTAREDE 1823339 · TMA998689 | an individual | 33 Wine | Registered | 2018 |
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| CASTWARE 0592083 · TMA350379 | NEWELL INDUSTRIES CANADA ULC | 21 Housewares | Registered | 1989 |
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| CASTOR 2192773 · TMA1280752 | an individual | 35 Advertising42 Science | Registered | 2025 |
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| CowStar 2103798 · TMA1126469 | Shenzhen Huoshi Network Technology Co. Ltd. | 28 Toys | Registered | 2022 |
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| Cusatur 2070328 · TMA1172262 | an individual | 9 Electronics | Registered | 2023 |
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| Costory 1962460 · TMA1115816 · design | Shanghai Nageer Technology Co. Ltd. | 3 Cosmetics | Registered | 2021 |
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| CASTRO 1812231 · TMA1031979 · design | Castro Model Ltd. | 3 Cosmetics9 Electronics18 Leather+2 | Registered | 2019 |
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| CASTER 1796614 · TMA1041118 | Delta Faucet Company | 11 Lighting | Registered | 2019 |
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| COSTER 1793154 · TMA994671 | Codeware, Inc. | 9 Electronics | Registered | 2018 |
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| CostRed 1733201 · TMA946547 | Costred Inc | 35 Advertising | Registered | 2016 |
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| CASTORE 1497079 · TMA860507 · design | Owner not shown | 16 Paper20 Furniture24 Textiles+2 | Registered | 2013 |
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| CASTRO 1273840 · TMA693973 | Castro Model Ltd. | 3 Cosmetics9 Electronics18 Leather+2 | Registered | 2007 |
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| CASTORS 0903522 | Scouts Canada | All goods and services | Protected | 1989 |
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| COSTER 0618874 · TMA364967 | an individual | 7 Machines13 Firearms | Registered | 1990 |
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| COOSTAR 2359752 · design | an individual | 25 Clothing | Pending | 2024 |
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| CASTAIR 2359447 | Owner not listed | 4 Oils7 Machines | Pending | 2024 |
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| Castore 2331002 | Owner not listed | 18 Leather25 Clothing28 Toys+1 | Pending | 2023 |
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