WINCHESTER ENERGY LTD — Proxy Solicitation & Information Statement 2026

Feb 4, 2026

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ASX Announcement

5 February 2026

Dear Shareholder

GENERAL MEETING OF SHAREHOLDERS

The Board of Directors of Winchester Energy Limited (the Company ) advises that it will be holding a general meeting of shareholders at Level 8, 99 St Georges Terrace, Perth on Thursday, 12 March 2026 at 11:00am (WST).

Notice of Meeting

The Board has made the decision that it will hold a physical Meeting.

In accordance with section 110D(1) of the Corporations Act 2001 (Cth), the Company will not be sending hard copies of the notice of Meeting (Notice) to shareholders unless a shareholder has requested a hard copy. The Notice can be viewed and downloaded from the Company’s website at https://www.winchesterenergyltd.com/investor/announcements or ASX at www2.asx.com.au (ASX:WEL).

You may vote by attending the Meeting in person (or by attorney), by proxy or by appointing a corporate representative. The Company strongly encourages shareholders to lodge a directed proxy form prior to the meeting.

Your proxy form must be received by 11:00am (AWST) on Tuesday, 10 March 2026, being not less than 48 hours before the commencement of the Meeting. Any proxy forms received after that time will not be valid for the Meeting. Instructions for how to lodge the proxy form are set out in the Notice.

Shareholders will have the opportunity to submit questions during the Meeting.

The Notice is important and should be read in its entirety. If you are in doubt as to the course of action you should follow, you should consult your financial adviser, lawyer, accountant or other professional adviser.

If you have any difficulties obtaining a copy of the Notice, please contact the Company’s share registry, Automic, on 1300 288 664 (within Australia) or +61 2 9698 5414 (overseas).

The Company encourages shareholders to provide an email address so we can communicate with you electronically for items such as notices of meeting and annual reports. Shareholders can still elect to receive some or all of their communications in physical or electronic form, or elect not to receive certain documents such as annual reports. To review or update your communication preferences, please contact the Company’s share registry on https://investor.automicgroup.com.au/#/home .

The Chairperson intends to vote all open proxies in favour of all resolutions, where permitted. There will be no presentation at the meeting.

Approved for release by the Board of Directors

For further information please contact:

Rory McGoldrick

Chief Executive Officer

info@winchesterenergyltd.com

Registered office: Level 8, 99 St Georges Tce Perth WA 6000, Australia

Contact: Winchester Energy Limited +62 8 9486 4036 ABN 21 168 586 445 info@winchesterenergyltd.com ASX: WEL