| COASTWISE 1982582 · TMA1151234 · design | COASTWISE PROCESSORS INC. | 29 Meat30 Coffee | Registered | 2022 |
| COASTWISE 0844695 · TMA491738 | COASTWISE PROCESSORS INC. | 29 Meat | Registered | 1998 |
| CASTCORE 1168913 · TMA610341 | Spa Logic Inc. | 17 Rubber | Registered | 2004 |
| CASTOCURE 0320537 · TMA167629 | CHEMTURA CANADA CO./CIE | 1 Chemicals | Registered | 1970 |
| COSTGAUGE 2361434 · design | Owner not shown | 35 Advertising37 Construction42 Science | Pending | 2024 |
| COASTIICOAST 2237389 · design | Owner not listed | 25 Clothing32 Beer33 Wine+7 | Pending | 2023 |
| COASTIICOAST 2237387 · design | Owner not listed | 25 Clothing32 Beer33 Wine+7 | Pending | 2023 |
| COASTIICOAST 2237382 | Owner not listed | 25 Clothing32 Beer33 Wine+7 | Pending | 2023 |
| COASTACLOUD 1714972 · TMA936160 · design | an individual | 9 Electronics | Registered | 2016 |
| CACTECHS 2258271 · TMA1276490 · design | CACTECHS CO. LIMITED | 35 Advertising | Registered | 2024 |
| CASETESTIFY 2245739 · TMA1263247 | Owner not listed | 42 Science | Registered | 2024 |
| COKTIK 2219371 · TMA1246973 | Hangzhou Sichen Network Technology Co.,Ltd. | 21 Housewares | Registered | 2024 |
| CUKTECH 2210579 · TMA1242933 · design | NanJing CukTech Electronics Technology Co., Ltd. | 9 Electronics | Registered | 2024 |
| CHACKTOK 2196282 · TMA1259532 · design | Marvel Technology (China) Co.Ltd | 9 Electronics | Registered | 2024 |
| COAGADEX 2138376 · TMA1179531 | Bio Products Laboratory Limited | 5 Pharmaceuticals | Registered | 2023 |
| CaseDoc 2097906 · TMA1216975 | Owner not shown | 9 Electronics35 Advertising38 Telecommunications+2 | Registered | 2024 |
| CHICSQUATCH 2088394 · TMA1174734 · design | an individual | 18 Leather | Registered | 2023 |
| CHEESEHEADS 2061805 · TMA1171064 · design | SAPUTO CHEESE USA INC. | 29 Meat | Registered | 2023 |
| CACTUSOFT 2061783 · TMA1277154 | 9247-1671 QUÉBEC INC. | 9 Electronics42 Science | Registered | 2024 |
| COSTZON 2058319 · TMA1215924 | VISIONAT INTERNATIONAL LIMITED | 15 Musical20 Furniture28 Toys | Registered | 2023 |
| CASTechnology 1989011 · TMA1217851 | Hazelett Strip-Casting Corporation | 40 Treatment | Registered | 2024 |
| CASTechnology 1988999 · TMA1216713 | Hazelett Strip-Casting Corporation | 40 Treatment | Registered | 2024 |
| CYSTAGON 1973877 · TMA1243615 | an individual | 5 Pharmaceuticals | Registered | 2024 |
| COSTGUARD 1965501 · TMA1254305 | Rio Ranch Supply Inc. | 35 Advertising | Registered | 2024 |
| CASTechnology 1936534 · TMA1239138 | Hazelett Strip-Casting Corporation | 7 Machines | Registered | 2024 |