Exhibit 21.1
| Company Name | Country | Date of Incorporation | Registration No. | ||||||||
| iRhythm Technologies Inc. | US (Delaware) | September 14, 2006 | 4211384 | ||||||||
| iRhythm Technologies Limited | UK | March 10, 2016 | 10055682 | ||||||||
| iRhythm Singapore Pte. Ltd. | Singapore | June 24, 2021 | 202120787H | ||||||||
iRhythm Japan GK (1) | Japan | June 7, 202 | #0110-03-014840 | ||||||||