Notice of the 26th Annual General Meeting of Shareholders

To Our Shareholders:

Takao Hayashi President

Securities code: 3662

October 7, 2025

28-12 Meieki 3-chome, Nakamura-ku, Nagoya

You are cordially informed of the 26th Annual General Meeting of Shareholders of Ateam Holdings Co., Ltd. (hereafter "Company", "Group" and other similar phrases), which will be held as indicated below.

If you are unable to attend the meeting in person, you may exercise your voting rights beforehand by mail or online.

If you vote by mail or online, please review the attached reference documents for the Annual General Meeting of Shareholders, and exercise your voting rights by Monday, October 27, 2025 at 7:00 p.m. Japan Standard Time (the end of business hours for the Company).

1. Date and Time:

2. Venue:

Tuesday, October 28, 2025 at 10:30 a.m. (Reception will open at 10:00 a.m.)

Ateam Holdings Co., Ltd.

32nd floor, Dai Nagoya Building

28-12 Meieki 3-chome, Nakamura-ku, Nagoya

3. Purpose

Matters to report:

1.

2.

Company Business Report and Consolidated Financial Statements for the 26th

fiscal year (from August 1, 2024 to July 31, 2025), including the audit results for the Consolidated Financial Statements by the Accounting Auditor and the Audit & Supervisory Board

The Non-Consolidated Financial Statements for the 26th fiscal year (from August 1, 2024 to July 31, 2025)

Matters for resolution:

Proposal No. 1 Election of Three Directors (excluding directors who are members of the Audit & Supervisory Committee)

Proposal No. 2 Election of Three Directors who are Audit and Supervisory Committee Members

Regarding Electronic Materials

We have implemented a system for providing electronic materials regarding the Annual General Meeting of Shareholders. Detailed materials have been uploaded on the following websites.

• Corporate Website: https://www.a-tm.co.jp/en/ir/dividends/shareholders-meeting/

• Shareholders' Meeting Materials Website: https://d.sokai.jp/3662/teiji/ (available only in Japanese)

• TSE Website: https://www2.jpx.co.jp/tseHpFront/JJK010010Action.do?Show=Show (available only in Japanese)

If printed documents are requested, the following information will be excluded in accordance with relevant laws, regulations, and our Articles of Incorporation. Therefore, documents provided to shareholders who request paper copies are only a portion of the accounting audit report or audit report reviewed by the accounting auditors or the audit committee (available only in Japanese).

1. Matters Related to Share Acquisition Rights, Etc. of the Company

2. Status of Accounting Auditor

3. Structure for Ensuring the Appropriateness of Business and Outline of its Operation Status

4. Consolidated Statement of Changes in Net Assets

5. Notes to Consolidated Financial Statements

6. Statement of Changes in Shareholders' Equity

7. Notes to Non-consolidated Financial Statements

   If circumstances arise that revisions to the electronic materials are required, we will post a notification to each of the websites listed above.

   
   
   

   How to Exercise Your Voting Rights

   The exercise of voting rights at the Company's Annual Meeting of Shareholders is an important right that our shareholders have. Please vote after reviewing the attached reference documents for the General Meeting of Shareholders. There are three methods for voting:

   Attending the Meeting

   Please present the enclosed proxy card at the reception desk upon arrival at the meeting.

   Date and Time

   Tuesday, October 28, 2025 at 10:30 a.m.

   (Reception will open at 10:00 a.m.)

How to Fill Out the Proxy Card

Please indicate approval or disapproval of the proposal.

If you exercise your voting rights in writing (by mail) and the voting form does not indicate your approval or disapproval of the proposal, your approval shall be deemed to have been indicated.

If you vote both by mail and online, only the votes on the latter shall be deemed valid. If you vote more than once on the online, only the last vote shall be deemed valid.

Instructions for Online Voting

You can simply log in to the website to vote without entering your login ID and temporary password printed on the proxy card.

1. Please scan the QR Code®printed on the proxy card.

   * "QR code" is a registered trademark of DENSO WAVE INCORPORATED.

2. Indicate your vote by following the instructions on the screen.

Voting website:

https://evote.tr.mufg.jp/

1. Please access the website to vote.

2. Enter your login ID and temporary password printed on the proxy card and click the "Log in" button.

3. Indicate your vote by following the instructions on the screen.

In case you need assistance for voting on your PC/smartphone, please contact the help desk listed below.

Mitsubishi UFJ Trust and Banking Corporation Corporate Agency Division (Help Desk)

Telephone: 0120-173-027 (Hours: 9:00 a.m. to 9:00 p.m., toll-free only in Japan)

Institutional investors may use the electronic voting platform for institutional investors operated by ICJ, Inc. Any fees incurred for accessing the voting website shall be borne by the shareholder.

Reference Documents for the General Meeting of Shareholders

Proposal No. 1: Election of Three Directors (excluding directors who are members of the Audit & Supervisory Committee)

The terms of office of both Directors (excluding directors who are members of the Audit & Supervisory Committee; the same shall apply hereinafter in this proposal) will expire at the conclusion of this General Meeting of Shareholders. Accordingly, we propose the election of three Directors, including one Outside Director.

The Audit & Supervisory Committee reviewed this proposal and did not express any opinions on this. Candidates for Director are as follows: