Notice Concerning Partial Amendment of Articles of Incorporation

May 14, 2026

Company name: SINFONIA TECHNOLOGY CO., LTD.

Name of representative: Minoru Yamakuni, President

(Securities code: 6507; TSE Prime Market)

Inquiries: Yasuhiro Tanimoto, Administrative & Personnel Department, General Affairs Secretary Group Leader

(Telephone: +81-3-5473-1800)

SINFONIA TECHNOLOGY CO., LTD. (the "Company") hereby announces that, at the meeting of the Board of Directors held today (May 14, 2026), it resolved to submit a proposal for a "Partial Amendment of Articles of Incorporation" to the 102nd Ordinary General Meeting of Shareholders scheduled to be held on June 26, 2026, as described below.

1. Reason for Amendment

   In order to enable flexible and agile response by the Board of Directors, amendments shall be made to Articles 24 and 25 of the current Articles of Incorporation.

2. Details of Amendment

   The details of the amendment shall be as follows.

   (The underlined portions indicate amendments.)

   Current Articles of Incorporation

   Proposed Amendment

   (Representative Directors and Directors with Specific Titles) Article 24 (Omitted) 2. The Board of Directors may, by resolution, appoint one Chairman, one President, and several Vice Presidents, Senior Managing Directors, and Managing Directors. (Convener and Chairperson of the Board of Directors) Article 25 Unless otherwise provided by laws and regulations, meetings of the Board of Directors shall be convened by the Chairman, who shall act as chairperson. 2. In the event of a vacancy in the position of Chairman or if that individual is unable to act, the President shall convene the meeting of the Board of Directors and act as chairperson. If the President is unable to act, another Director shall convene the meeting of the Board of Directors and act as chairperson in accordance with the order predetermined by the Board of Directors.

   (Representative Directors and Directors with Specific Titles) Article 24 (According to the Current Articles of Incorporation) 2. The Board of Directors may, by resolution, appoint Directors with specific titles. (Convener and Chairperson of the Board of Directors) Article 25 Unless otherwise provided by laws and regulations, meetings of the Board of Directors shall be convened by a Director designated in advance by a resolution of the Board of Directors, who shall act as chairperson. 2. In the event of vacancy in the position of the Director referred to in the preceding paragraph or if such Director is unable to act, another Director shall convene the meeting of the Board of Directors and act as chairperson in accordance with the order predetermined by the Board of Directors.

3. Schedule

Date of General Meeting of Shareholders for amendment: June 26, 2026 Effective date of amendment: June 26, 2026