| IDX 2133571 · TMA1176692 | Identity Theft Guard Solutions, Inc. | 9 Electronics35 Advertising38 Telecommunications+2 | Registered | 2023 |
| IDK 2080618 · TMA1284113 · design | IDK Co. Ltd. | 40 Treatment42 Science | Registered | 2025 |
| IDS 2003461 · TMA1140330 | International Decision Systems, Inc. | 9 Electronics42 Science | Registered | 2022 |
| IDC + 1852183 · TMA1052393 · design | Immanence Integral Dermo Correction Inc. | 3 Cosmetics | Registered | 2019 |
| IDC 1710140 · TMA927791 | IDC Worldsource Insurance Network Inc. | 36 Finance | Registered | 2016 |
| IDQ 1682044 · TMA928033 · design | InBay Technologies Inc. | 9 Electronics | Registered | 2016 |
| IDC 1677829 · TMA927677 | JULIUS-K9 Zrt. (Limited Company) | 6 Metal14 Jewellery16 Paper+5 | Registered | 2016 |
| IDQ 1593182 · TMA925798 | InBay Technologies Inc. | 9 Electronics | Registered | 2016 |
| IDS 1532016 · TMA827747 | Informa Canada Inc. | 18 Leather21 Housewares25 Clothing+1 | Registered | 2012 |
| IDX 1449136 · TMA803862 | IDX Corporation | 6 Metal19 Building20 Furniture+3 | Registered | 2011 |
| IDS 1376096 · TMA738197 | Owner not shown | 35 Advertising | Registered | 2009 |
| IDC 0846754 · TMA535557 | INTERNATIONAL DATA GROUP, INC. | 42 Science | Registered | 2000 |
| IDQ+ 2337883 | Infomed SA | 10 Medical | Pending | 2024 |
| IDS 2273227 · design | Owner not listed | 9 Electronics42 Science | Pending | 2023 |
| IDC 2113475 · design | INTERNATIONAL DATA GROUP, INC. | 35 Advertising41 Education42 Science | Pending | 2021 |
| IDG 2113474 · design | INTERNATIONAL DATA GROUP, INC. | 35 Advertising41 Education42 Science | Pending | 2021 |
| IDS 2084436 | EOS Worldwide, LLC | 9 Electronics35 Advertising41 Education+1 | Pending | 2021 |
| ITC 2205100 · TMA1240141 · design | Guangzhou BaoLun Electronics Co., Ltd | 38 Telecommunications | Registered | 2024 |
| ITASA 2203388 · TMA1225455 · design | Owner not shown | 16 Paper | Registered | 2024 |
| iTag 2188293 · TMA1269799 | Position Imaging, Inc. | 9 Electronics | Registered | 2024 |
| ITC 2181604 · TMA1259473 | Memphis Wood Fire Grills, LLC | 11 Lighting | Registered | 2024 |
| IDEGG 2100992 · TMA1198707 | Shenzhen Feikeyida Technology Co. Ltd | 25 Clothing | Registered | 2023 |
| ITHACA 2089315 · TMA1223597 · design | SANOFI | 42 Science | Registered | 2024 |
| ITK. 2087927 · TMA1254709 | Yahoo Inc. | 35 Advertising | Registered | 2024 |
| ITUOZO 2075669 · TMA1138852 | Fresenius Kabi Deutschland GmbH | 5 Pharmaceuticals | Registered | 2022 |