Exhibit 21.1

List of Subsidiaries

iRhythm Technologies Limited

Company Name

Place of Incorporation

iRhythm Technologies Limited

United Kingdom

iRhythm Singapore PTE. Ltd.

Singapore

iRhythm Japan GK (1)

Japan

iRhythm Philippines, Inc. (1)

Philippines

iRhythm Technologies Netherlands B.V.

Netherlands

(1) This an indirect subsidiary through iRhythm Singapore PTE. Ltd.