SOFTBANK GROUP CORP. - 18 Mar 2026 Form 3 Insider Report for ARM HOLDINGS PLC /UK (ARM)

Role
Director, 10%+ Owner
Signature
SoftBank Group Corp., By: /s/ Yuko Yamamoto, Head of Corporate Legal Department
Issuer symbol
ARM
Transactions as of
18 Mar 2026
Net transactions value
$0
Form type
3
Filing time
18 Mar 2026, 16:47:37 UTC
Previous filing
03 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
SOFTBANK GROUP CORP. Director, 10%+ Owner 1-7-1 KAIGAN, MINATO-KU, TOKYO, JAPAN SoftBank Group Corp., By: /s/ Yuko Yamamoto, Head of Corporate Legal Department 18 Mar 2026 0001065521

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding ARM Ordinary Shares 922,733,999 18 Mar 2026 By limited liability company F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), of Arm Holdings plc (the "Company") may be represented by American Depositary Shares, each representing one Ordinary Share.
F2 Represents shares held of record by Kronos II LLC ("Kronos II"). Kronos II is an indirect wholly-owned subsidiary of SoftBank Group Corp. ("SoftBank Group"). Kronos II is a direct wholly-owned subsidiary of Kronos I (UK) Limited, which is in turn a direct wholly-owned subsidiary of Kronos Holdco (UK) Limited, which is in turn a direct wholly-owned subsidiary of SoftBank Group Capital ("SBGC"). SBGC is an indirect wholly-owned subsidiary of SoftBank Group, whose interests are held 46% by SoftBank Group and 54% by SoftBank Group Overseas GK, a direct wholly-owned subsidiary of SoftBank Group.

Remarks:

Solely for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, SoftBank Group may be deemed a "director by deputization" by virtue of its director appointment rights pursuant to that certain Shareholder Governance Agreement, dated September 19, 2023, by and between SoftBank Group and the Company.