Exhibit 8.1

Subsidiaries of Arm Holdings plc

The following is a list of subsidiaries of Arm Holdings plc as of March 31, 2026, omitting subsidiaries which, considered in the aggregate, would not constitute a significant subsidiary.

Name of Subsidiary

Jurisdiction of Incorporation

Ownership by Arm Holdings plc

Arm Embedded Technologies Private Limited

India

100%

Arm France SAS

France

100%

Arm, Inc.

Delaware

100%

Arm Limited

England and Wales

100%