HashKey Holdings Limited — Proxy Solicitation & Information Statement 2026

Apr 29, 2026

HASHKEY

HashKey Holdings Limited

(Incorporated in the Cayman Islands with limited liability)

(Stock code: 3887)

Number of shares to which this form of proxy relates (Note 1)

FORM OF PROXY FOR THE ANNUAL GENERAL MEETING

TO BE HELD ON THURSDAY, JUNE 11, 2026

I/We $^{(Note2)}$

of

being the registered holder(s) of shares in the issued share capital of HashKey Holdings Limited (the "Company") hereby appoint the Chairman of the meeting $^{(Note3)}$ or

of

as my/our proxy to attend, act and vote for me/us and on my/our behalf as directed below at the annual general meeting (the "AGM") of the Company for the year 2026 to be held at 14th Floor, Three Exchange Square, 8 Connaught Place, Central, Hong Kong on Thursday, June 11, 2026 at 4:00 p.m. (and at any adjournment thereof).

Please tick $(^{},^{*})$ the appropriate boxes to indicate how you wish your vote(s) to be cast $^{(Note4)}$ .

ORDINARY RESOLUTIONS		FOR	AGAINST
1.	To receive the audited consolidated financial statements of the Company and the reports of the directors and auditors of the Company for the year ended December 31, 2025.
2(a).	To re-elect Dr. Xiao Feng as an executive director of the Company.
2(b).	To re-elect Mr. Lu Weiding as a non-executive director of the Company.
3.	To authorize the board of Directors (the “Board”) to fix the remuneration of the directors of the Company.
4.	To re-appoint KPMG as auditor of the Company and to authorize the Board fix their remuneration.
5.	To grant a general mandate to the directors of the Company to repurchase shares of the Company not exceeding 10% of the total number of issued shares of the Company (excluding Treasury Shares) as at the date of passing of this resolution.
6.	To grant a general mandate to the directors of the Company to issue, allot and deal with additional shares of the Company (including any sale and transfer of Treasury Shares) not exceeding 20% of the total number of issued shares of the Company (excluding Treasury Shares) as at the date of passing of this resolution.
7.	To extend the general mandate granted to the directors of the Company to issue, allot and deal with additional shares in the capital of the Company by adding the aggregate number of the shares bought back by the Company.

Date: 2026

Signature(s) $^{(Note5)}$

Notes:

1. Please insert the number of shares to which this form of proxy relates. If no number is inserted, this form of proxy will be deemed to relate to all the shares of the Company registered in your name(s). If more than one proxy is appointed, the number of shares in respect of which each such proxy so appointed must be specified.
2. Full name(s) and address(es) to be inserted in BLOCK CAPITALS. The names of all joint holders should be stated.
3. If any proxy other than the Chairman of the meeting is preferred, please strike out the words "the Chairman of the meeting" and insert the name and address of the proxy desired in the space provided. Any member of the Company entitled to attend and vote at the AGM is entitled to appoint another person as his proxy to attend, speak and vote instead of him. A member who is the holder of two or more shares may appoint more than one proxy to represent him and vote on his behalf. A proxy need not be a member of the Company. On a poll, every member who is present in person or by proxy shall have one vote for every fully paid-up share held by him.
4. IMPORTANT: IF YOU WISH TO VOTE FOR A RESOLUTION, PLEASE TICK $(^{},^{})$ THE BOX MARKED "FOR". IF YOU WISH TO VOTE AGAINST A RESOLUTION, PLEASE TICK $(^{},^{**})$ THE BOX MARKED "AGAINST". If no direction is given, your proxy will vote or abstain at his discretion. Your proxy will also be entitled to vote at his discretion on any resolution properly put to the AGM other than those referred to in the notice convening the AGM.
5. This form of proxy must be executed by or on behalf of the appointor. In case of a corporation, the same must be executed either under its common seal or under the hand of a duly authorised officer or attorney. ANY ALTERATION MADE TO THIS FORM OF PROXY MUST BE INITIALLED BY THE PERSON WHO SIGNS IT.
6. In case of joint holders, the vote of the senior who tenders a vote, whether in person or by proxy, will be accepted to the exclusion of votes of the other joint holder(s) and for this purpose seniority will be determined by the order in which the names of the holders stand in the Register of Members of the Company.
7. In order to be valid, this form of proxy and any authority under which it is executed or a copy of the authority certified notarially, must be deposited at the Company's Hong Kong Share Registrar, Tricor Investor Services Limited, at 17/F, Far East Finance Centre, 16 Harcourt Road, Hong Kong not less than 48 hours (excluding any part of a day that is a public holiday) before the time appointed for the meeting or the adjourned meeting (as the case may be). Accordingly, the form of proxy must be delivered to the Company's share registrar not later than 4:00 p.m. on Tuesday, June 9, 2026.
8. Deposit of the form of proxy will not preclude you from attending and voting in person at the AGM if you so wish and in such event, the form of proxy shall be deemed to be revoked.
9. References to time and dates in this form of proxy are to Hong Kong time and dates.
10. Treasury Shares, if any and registered under the name of the Company, shall have no voting rights at the general meeting(s) of the Company. For the avoidance of doubt, solely from the perspective of the Listing Rules, the Company shall, upon depositing any Treasury Shares in the CCASS, abstain from voting at any of its general meeting(s) in relation to those shares.

PERSONAL INFORMATION COLLECTION STATEMENT

Your supply of your and your proxy's (or proxies') name(s) and address(es) is on a voluntary basis for the purpose of processing your request for the appointment of a proxy (or proxies) and your voting instructions for the AGM of the Company (the "Purposes"). We may transfer your and your proxy's (or proxies') name(s) and address(es) to our agent, contractor, or third party service provider who provides administrative, computer and other services to us for use in connection with the Purposes and to such parties who are authorised by law to request the information or are otherwise relevant for the Purposes and need to receive the information. Your and your proxy's (or proxies') name(s) and address(es) will be retained for such period as may be necessary to fulfil the Purposes. Request for access to and/or correction of the relevant personal data can be made in accordance with the provisions of the Personal Data (Privacy) Ordinance and any such request should be in writing by mail to the Company.