Stream Ideas Group Limited — Proxy Solicitation & Information Statement 2026

May 27, 2026

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited (the “Stock Exchange”) take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

Stream Ideas Group Limited

源想集團有限公司

(Incorporated in the Cayman Islands with limited liability)

(Stock code: 8401)

NOTICE OF EXTRAORDINARY GENERAL MEETING

Notice is hereby given that the extraordinary general meeting (the “Meeting”) of Stream Ideas Group Limited (the “Company”) will be held at Room 3302, 33/F, West Tower, Shun Tak Centre, 200 Connaught Road Central, Hong Kong on Tuesday, 16 June 2026 at 11:00 a.m. for the purpose of considering and, if thought fit, passing, with or without amendments, the following resolutions as ordinary resolutions of the Company:

ORDINARY RESOLUTIONS

1. to confirm, accept and ratify the resignation of OOP CPA & Co. as the auditor of the Company with effect from 8 April 2026;
2. to approve, confirm and ratify the appointment of Infinity CPA Limited as the auditor of the Company in place of OOP CPA & Co. with effect from 8 April 2026 until the conclusion of the forthcoming annual general meeting of the Company, and that the board of directors (the “Director(s)”) of the Company be and is hereby authorised to fix its remuneration.

By order of the Board

Stream Ideas Group Limited

Xie Cheng

Chairman

Hong Kong, 27 May 2026

Registered office:
Maples Corporate Services Limited
PO Box 309
Ugland House
Grand Cayman
KY1-1104
Cayman Islands

Principal place of business in Hong Kong:
Unit 402A, 4/F
Benson Tower
74 Hung To Road
Kwun Tong
Hong Kong

---

• 2 -

Notes:

(1) Any Shareholder entitled to attend and vote at the EGM is entitled to appoint another person as his/her/its proxy to attend and vote on his/her/its behalf. A proxy need not be a Shareholder. A Shareholder who is the holder of two or more Shares may appoint more than one proxy to attend and vote on his/her/its behalf.

(2) In order to be valid, a form of proxy together with the power of attorney or other authority (if any) under which it is signed, or a notarially certified copy of such power of attorney or authority, must be deposited at the Company's branch share registrar and transfer office in Hong Kong, Tricor Investor Services Limited, at 17/F., Far East Finance Centre, 16 Harcourt Road, Hong Kong not less than 48 hours before the time appointed for the holding of the EGM or any adjournment thereof. Completion and return of the form of proxy will not preclude a Shareholder from attending and voting in person at the EGM or any adjournment thereof should he/she/it so wish.

(3) For the purpose of determining the entitlement of the Shareholders to attend and vote at the EGM, the register of members of the Company will be closed from Thursday, 11 June 2026 to Tuesday, 16 June 2026 (both days inclusive), during which period no transfer of Shares will be effected. The record date will be Tuesday, 16 June 2026. In order to be entitled to attend and vote at the EGM, all transfer documents accompanied by the relevant share certificates must be lodged with the Company's branch share registrar and transfer office in Hong Kong, Tricor Investor Services Limited, at 17/F., Far East Finance Centre, 16 Harcourt Road, Hong Kong for registration not later than 4:30 p.m. on Wednesday, 10 June 2026.

(4) In the event of any inconsistency, the English language text of this notice shall prevail over the Chinese language text.

(5) Delivery of an instrument appointing a proxy shall not preclude a member from attending and voting in person at the Meeting convened and in such event, the instrument appointing a proxy shall be deemed to be revoked.

(6) If a tropical cyclone warning signal number 8 or above, a "black" rainstorm warning signal or "extreme conditions" caused by super typhoons announced by the Government of Hong Kong is/are in force at any time after 9:00 a.m. on the date of the EGM, the EGM will be postponed and Shareholders will be notified by way of an announcement on the websites of the Company and the Stock Exchange of the date, time and venue of the rescheduled meeting.

(7) Where there are joint holders of any share, any one of such joint holders may vote, either in person or by proxy, in respect of such share as if he were solely entitled thereto, but if more than one of such joint holders be present at any meeting the vote of the senior who tenders a vote, whether in person or by proxy, shall be accepted to the exclusion of the votes of the other joint holders, and for this purpose seniority shall be determined by the order in which the names stand in the register of members of the Company in respect of the joint holding.

(8) The voting at the Meeting shall be taken by way of poll.

As at the date of this notice, the Board comprises five executive Directors, namely Mr. Xie Cheng (Chairman), Ms. Cai Ying (Chief Executive Officer), Mr. Lee Wing Leung Garlos, Mr. Zhang Yu and Mr. Fu Tao; and four independent non-executive Directors, namely Mr. Kwan Chi Hong, Mr. Ho Ho Tung Armen, Mr. Yiu Chun Wing and Ms. Meng Mei.

This notice, for which the Directors collectively and individually accept full responsibility, includes particulars given in compliance with the GEM Listing Rules for the purpose of giving information with regard to the Company. The Directors, having made all reasonable enquiries, confirm that to the best of their knowledge and belief the information contained in

---

this notice is accurate and complete in all material respects and not misleading or deceptive, and there are no other matters the omission of which would make any statement herein or this notice misleading.

This notice will remain on the website of The Stock Exchange of Hong Kong Limited at www.hkexnews.hk on the "Latest Listed Company Information" page for at least 7 days from the date of its posting and will be published on the Company's website at www.streamideas.com.

• 3 -