| COLDFRONT 1938073 · TMA1106890 | ColdFront Ltd. | 35 Advertising37 Construction39 Transport | Registered | 2021 |
| CLOUDFIT 2018374 · TMA1131674 | Cloudfit Software, LLC | 9 Electronics42 Science | Registered | 2022 |
| CLOUDPOINT 1850781 · TMA1058394 | Veritas Technologies LLC | 9 Electronics | Registered | 2019 |
| CLOUDFLO 1641568 · TMA936591 · design | Automatic Bar Controls, Inc. | 9 Electronics35 Advertising42 Science | Registered | 2016 |
| CLOUDFLO 1641567 · TMA936592 | Automatic Bar Controls, Inc. | 9 Electronics35 Advertising42 Science | Registered | 2016 |
| CLOUDFIT 2297829 | Kimberly-Clark Worldwide, Inc. | 5 Pharmaceuticals | Pending | 2023 |
| Cloudflow 2281210 | On Clouds GmbH | 25 Clothing | Pending | 2023 |
| CLOUDBRINK 2147238 | Cloudbrink Inc. a Delaware corporation | 9 Electronics42 Science | Pending | 2021 |
| CLOUDPROTECT 1515435 · TMA868501 · design | AEP Networks, Inc. | 42 Science | Registered | 2014 |
| CLOUDAVANTI 2350686 | Owner not listed | 35 Advertising41 Education42 Science | Pending | 2024 |
| CLOUDPERMIT 2029067 · design | an individual | 9 Electronics45 Legal | Pending | 2020 |
| CLOUDPERMIT 2005003 | an individual | 9 Electronics45 Legal | Pending | 2020 |
| Cloudprime 2186451 · TMA1272593 | On Clouds GmbH | 25 Clothing28 Toys42 Science | Registered | 2024 |
| 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 |
| CLOUDBOOK 2000645 · TMA1144319 | HOLDHAM | 16 Paper | Registered | 2022 |
| CLOUDFALL 1960840 · TMA1135244 | SUTTER HOME WINERY, INC. | 33 Wine | Registered | 2022 |
| CLOUDBREAK 1731902 · TMA964834 | P. GOOI PROFESSIONAL CORPORATION | 44 Medical | Registered | 2017 |
| CloudBooks 1723424 · TMA954054 | an individual | 35 Advertising | Registered | 2016 |
| CLOUDFORMS 1711742 · TMA937680 | Red Hat, Inc. | 9 Electronics42 Science | Registered | 2016 |
| CLOUDFLARE 1650049 · TMA896980 | CloudFlare, Inc. a legal entity | 9 Electronics42 Science | Registered | 2015 |
| CloudBand 1575237 · TMA894209 | an individual | 9 Electronics38 Telecommunications42 Science | Registered | 2015 |
| CLOUDFORGE 1570938 · TMA876227 | CollabNet, Inc. (a Delaware corporation) | 9 Electronics42 Science | Registered | 2014 |
| CLOUDBOX 1536643 · TMA881311 | Seagate Technology LLC | 9 Electronics38 Telecommunications39 Transport+1 | Registered | 2014 |
| CLOUDOPS 1507625 · TMA895708 | CLOUDOPS INC. | 42 Science | Registered | 2015 |