| CLOUDBOX 1536643 · TMA881311 | Seagate Technology LLC | 9 Electronics38 Telecommunications39 Transport+1 | Registered | 2014 |
| CLOUDBOX 2232813 | Cloud Cover Media, Inc. | 9 Electronics | Pending | 2023 |
| COLDFX 1239084 · TMA655100 | Bausch + Lomb Corporation | 5 Pharmaceuticals | Registered | 2005 |
| COLDBLOCK 1713099 · TMA989714 | ColdBlock Technologies Inc. | 9 Electronics42 Science | Registered | 2018 |
| COLDFORM 1832618 · TMA1009974 | DJO Consumer, LLC | 10 Medical | Registered | 2018 |
| COLDFORM 1606545 · TMA915487 | Evolution Sorbent Products, LLC, a Wisconsin limited liability company | 1 Chemicals9 Electronics16 Paper+2 | Registered | 2015 |
| COLDFORM 2012142 | CORNING INCORPORATED | 21 Housewares | Pending | 2020 |
| COLDTUB 1487874 · TMA815917 · design | Spa Logic Inc. | 9 Electronics11 Lighting | Registered | 2012 |
| Coldab 1405735 · TMA774968 | Picodeon Ltd Oy | 9 Electronics10 Medical40 Treatment | Registered | 2010 |
| CLADBOY 2349163 | Owner not listed | 7 Machines | Pending | 2024 |
| CLOUDBOOK 2000645 · TMA1144319 | HOLDHAM | 16 Paper | Registered | 2022 |
| COLDFRONT 1938073 · TMA1106890 | ColdFront Ltd. | 35 Advertising37 Construction39 Transport | Registered | 2021 |
| COLDBREAK 1904211 · TMA1110348 | Cold Break Brewing, LLC | 6 Metal11 Lighting20 Furniture+1 | Registered | 2021 |
| COLDFORM2 1630993 · TMA915488 | FyterTech Holdings, Inc. | 1 Chemicals9 Electronics16 Paper+2 | Registered | 2015 |
| COLDBLACK 1406163 · TMA829136 | an individual | 1 Chemicals2 Paints9 Electronics+4 | Registered | 2012 |
| CLOUDBORN 2286520 | an individual | 9 Electronics | Pending | 2023 |
| CLOUDBOOM 2281219 | On Clouds GmbH | 25 Clothing | Pending | 2023 |
| COLDBREAK 2181570 · design | Cold Break Brewing, LLC | 11 Lighting | Pending | 2022 |
| Cloudprime 2186451 · TMA1272593 | On Clouds GmbH | 25 Clothing28 Toys42 Science | Registered | 2024 |
| CLOUDBADGING 2180697 · TMA1256331 · design | Barcodes, LLC | 42 Science | Registered | 2024 |
| CLOUDBADGING 2179379 · TMA1256316 | Barcodes, LLC | 42 Science | Registered | 2024 |
| CULTIVMI 2160253 · TMA1187899 | an individual | 5 Pharmaceuticals9 Electronics16 Paper+4 | Registered | 2023 |
| Cloudfarms 2159813 · TMA1228886 | an individual | 9 Electronics35 Advertising38 Telecommunications+3 | Registered | 2024 |
| Cloudful 2155905 · TMA1192167 | SINGAPORE FULL SCALE FULL SPEED PTE.LTD. | 24 Textiles25 Clothing35 Advertising | Registered | 2023 |
| Cloudvista 2154439 · TMA1272452 | On Clouds GmbH | 25 Clothing28 Toys42 Science | Registered | 2024 |