OneConstruction Group Ltd

PROXY STATEMENT

The board of directors (the “Board of Directors”) of OneConstruction Group Limited (the “Company”) is soliciting proxies for the 2025 annual general meeting (the “Meeting”) of the Company to be held on December 22, 2025, at 10 a.m., China Standard Time, at Room 908, 9/F, Gloucester Tower, The Landmark, 15 Queen’s Road Central, Hong Kong or any adjournment thereof.

Only holders of the ordinary shares of the Company of record at the close of business on November 25, 2025 (the “Record Date”) are entitled to attend and vote at the Meeting or at any adjournment thereof. The shareholders entitled to vote and present, in person or by proxy or (in the case of a shareholder being a corporate entity) by its duly authorized representative, representing not less than one-third in nominal value of the total issued voting shares in the Company throughout the meeting shall form a quorum.

Any shareholder entitled to attend and vote at the Meeting is entitled to appoint a proxy to attend and vote on such shareholder’s behalf. A proxy need not be a shareholder of the Company. Each holder of the Company’s ordinary shares shall be entitled to one vote in respect of each ordinary share held by such holder on the Record Date.