| IOACTIVE 2260939 | IOActive, Inc | 35 Advertising41 Education42 Science | Pending | 2023 |
| 6ixDipped 2118729 · TMA1185193 | an individual | 30 Coffee | Registered | 2023 |
| ISDP 2087247 · TMA1207160 · design | HUAWEI TECHNOLOGIES CO., LTD. | 9 Electronics | Registered | 2023 |
| IGTV 1922302 · TMA1207998 | Instagram, LLC | 9 Electronics35 Advertising38 Telecommunications+3 | Registered | 2023 |
| IZOTOPE 1917319 · TMA1123418 | iZotope, Inc. | 9 Electronics | Registered | 2022 |
| ISTOBAL 1772363 · TMA987232 · design | an individual | 7 Machines9 Electronics11 Lighting+1 | Registered | 2017 |
| ISTBLAST 1693871 · TMA931026 | IST TECHNOLOGIES DE SURFACE INTERNATIONAL INC./INTERNATIONAL SURFACE TECHNOLOGIES IST INC. | 3 Cosmetics7 Machines9 Electronics+5 | Registered | 2016 |
| ISTPURE 1693812 · TMA916527 | IST TECHNOLOGIES DE SURFACE INTERNATIONAL INC./INTERNATIONAL SURFACE TECHNOLOGIES IST INC. | 7 Machines35 Advertising37 Construction+2 | Registered | 2015 |
| ISTEP 1680905 · TMA934945 · design | QINGDAO FIRST STEP GROUP CO. LTD. | 25 Clothing | Registered | 2016 |
| IXCATAPULT 1505023 · TMA831560 | Keysight Technologies, Inc. | 9 Electronics | Registered | 2012 |
| ISTOP 1382546 · TMA810821 | Institute for the Study and Treatment of Pain | 9 Electronics10 Medical16 Paper+5 | Registered | 2011 |
| ICTAB 1302547 · TMA702938 · design | CANADIAN INSTITUTE OF STEEL CONSTRUCTION | 35 Advertising | Registered | 2007 |
| ISOTAP 1157574 · TMA655507 | HARBISONWALKER INTERNATIONAL, INC. | 19 Building | Registered | 2005 |
| IsTV 1034485 · TMA547462 | Health Hub Patient Engagement Solutions Inc. | 9 Electronics | Registered | 2001 |
| IGETABOND 0384226 · TMA247441 | SUMITOMO CHEMICAL COMPANY LIMITED | 1 Chemicals3 Cosmetics5 Pharmaceuticals+1 | Registered | 1980 |
| ISTOP 2289828 | PT Papertech Inc. | 9 Electronics | Pending | 2023 |
| iSTOP+ 2289822 | PT Papertech Inc. | 9 Electronics | Pending | 2023 |
| IstaBloc 2274523 | Buhl-PaperForm GmbH | 16 Paper | Pending | 2023 |
| 6ixDevInc 2272120 | an individual | 36 Finance37 Construction | Pending | 2023 |
| ISTP 2221071 | BODY MIND & SOUL THERAPY INC. | 41 Education44 Medical | Pending | 2022 |
| ISTOBAL 2209862 · design | an individual | 7 Machines | Pending | 2022 |
| IGDB 2052967 | Twitch Interactive, Inc. | 9 Electronics35 Advertising38 Telecommunications+3 | Pending | 2020 |
| ISDB 0974145 · design | Islamic Development Bank | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2020 |
| IsDB 0973283 | Islamic Development Bank / Banque Islamique de Développement | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2015 |
| ICITFO 0922185 | Owner not shown | 1 Chemicals2 Paints3 Cosmetics+42 | Pending | 2013 |