Wellchange Holdings Co Ltd

PROXY

Solicited on Behalf of the Board of Directors for a Meeting of Holders of Class B Ordinary Shares

To be held on Thursday, October 29, 2026 at 10:00 a.m. Hong Kong Time (Wednesday, October 28, 2026 at 10:00 p.m. Eastern Time)

The undersigned hereby appoints Mr. Shek Kin Pong as proxy with full power of substitution, to represent and to vote as set forth herein all the Class B ordinary shares of Wellchange Holdings Company Limited (the “Company”) which the undersigned is entitled to vote at the Class B Meeting and any adjournments or postponements thereof. If no designation is made, the proxy, when properly executed, will be voted “FOR” Item 1.

Item 1. By a special resolution of the holders of Class B Ordinary Shares, being the affirmative vote of not less than two-thirds (2/3) of the votes cast by the holders of Class B Ordinary Shares present in person or by proxy and entitled to vote at the Class B Meeting, to approve, insofar as the same constitutes a variation or abrogation of the rights attached to the Class B Ordinary Shares, (i) the Class A Share Consolidation (the consolidation of every ten (10) issued and unissued Class A Ordinary Shares into one (1) Class A Ordinary Share, at an aggregate ratio of one-for-ten (1-for-10)) and (ii) the adoption of the seventh amended and restated memorandum and articles of association of the Company, all as more fully described in the accompanying Proxy Statement (the “Class B Proposal”).

☐ For ☐ Against ☐ Abstain

In his discretion, the proxy is authorized to vote upon any other matters which may properly come before the meeting or any adjournment or postponement thereof.