| CLOUDBOOK 2000645 · TMA1144319 | HOLDHAM | 16 Paper | Registered | 2022 |
| CLOUDBOX 1536643 · TMA881311 | Seagate Technology LLC | 9 Electronics38 Telecommunications39 Transport+1 | Registered | 2014 |
| CLOUDBERG 2320496 · design | Yangzhou Seno Excellion Trading Co.Ltd | 10 Medical | Pending | 2024 |
| CLOUDBOOM 2281219 | On Clouds GmbH | 25 Clothing | Pending | 2023 |
| CLOUDBOX 2232813 | Cloud Cover Media, Inc. | 9 Electronics | Pending | 2023 |
| CLOUDPOINT 1850781 · TMA1058394 | Veritas Technologies LLC | 9 Electronics | Registered | 2019 |
| CloudBooks 1723424 · TMA954054 | an individual | 35 Advertising | Registered | 2016 |
| CLOUDFORMS 1711742 · TMA937680 | Red Hat, Inc. | 9 Electronics42 Science | Registered | 2016 |
| CLOUDFORGE 1570938 · TMA876227 | CollabNet, Inc. (a Delaware corporation) | 9 Electronics42 Science | Registered | 2014 |
| CLOUDBRINK 2147238 | Cloudbrink Inc. a Delaware corporation | 9 Electronics42 Science | Pending | 2021 |
| CLOUDBLUE 1898200 · TMA1112752 · design | CloudBlue LLC | 9 Electronics35 Advertising36 Finance+3 | Registered | 2021 |
| CLOUDBLUE 1690939 · TMA980048 · design | CloudBlue LLC | 35 Advertising36 Finance37 Construction+2 | Registered | 2017 |
| CloudBand 1575237 · TMA894209 | an individual | 9 Electronics38 Telecommunications42 Science | Registered | 2015 |
| CLOUDOPS 1507625 · TMA895708 | CLOUDOPS INC. | 42 Science | Registered | 2015 |
| CLOUDBEES 1506527 · TMA825456 | Cloudbees, Inc. | 9 Electronics41 Education42 Science | Registered | 2012 |
| CLOUDBC 0924678 | Her Majesty the Queen in right of the Province of British Columbia, as represented by the Minister of Advanced Education, Training and Technology | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2017 |
| CLOUDBC 0924677 · design | Her Majesty the Queen in right of the Province of British Columbia, as represented by the Minister of Advanced Education, Training and Technology | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2017 |
| CLOUDVISORY 2080495 · TMA1141998 | FireEye, Inc. | 9 Electronics42 Science | Registered | 2022 |
| Cloudfarms 2159813 · TMA1228886 | an individual | 9 Electronics35 Advertising38 Telecommunications+3 | Registered | 2024 |
| CloudBuyer 1990092 · TMA1124951 | an individual | 17 Rubber | Registered | 2022 |
| CLOUDBACKO 1742366 · TMA974296 · design | CloudBacko Corporation | 2 Paints9 Electronics35 Advertising+1 | Registered | 2017 |
| CLOUDBREAK 1731902 · TMA964834 | P. GOOI PROFESSIONAL CORPORATION | 44 Medical | Registered | 2017 |
| CLOUDFLARE 1650049 · TMA896980 | CloudFlare, Inc. a legal entity | 9 Electronics42 Science | Registered | 2015 |
| CLOUDFRONT 2229077 | Amazon Technologies, Inc. | 9 Electronics38 Telecommunications42 Science | Pending | 2022 |
| CLOUDBADGING 2180697 · TMA1256331 · design | Barcodes, LLC | 42 Science | Registered | 2024 |