NORTHERN STAR RESOURCES LTD — Proxy Solicitation & Information Statement 2025

Mar 16, 2025

DISPATCH OF SCHEME BOOKLET AND LETTER TO DE GREY SHAREHOLDERS

De Grey Mining Ltd (ASX:DEG, “ De Grey” ) refers to its announcement on 10 March 2025 in relation to:

• the proposed acquisition of 100% of the shares in De Grey by Northern Star Resources Ltd (ASX: NST, “ Northern Star ”) by way of a Court-approved scheme of arrangement under Part 5.1 of the Corporations Act 2001 (Cth) (“ Scheme ”); and

• the orders made by the Federal Court of Australia (Western Australia registry) (“ Court ”) that De Grey convene a meeting of its ordinary shareholders (“ Scheme Meeting ”) to consider and vote on a resolution to approve the Scheme (“ Scheme Resolution ”) and approving the distribution by De Grey of an explanatory statement providing information about the Scheme and the Notice of Scheme Meeting (“ Scheme Booklet ”) to De Grey Shareholders.

Capitalised terms used in this announcement have the meaning given to them in the Scheme Booklet, unless the context otherwise requires.

Details regarding dispatch

De Grey has today completed the dispatch of the Scheme Booklet, which was sent to De Grey Shareholders as follows, in accordance with the orders of the Court:

• De Grey Shareholders who have elected to receive electronic communications from De Grey have received an email with a link to view or download a copy of the Scheme Booklet, and a link to access their personalised proxy form for the Scheme Meeting;

• De Grey Shareholders who have elected to receive physical communications from De Grey have been sent a letter (by post) with a physical copy of the Scheme Booklet and a personalised proxy form for the Scheme Meeting; and

• all other De Grey Shareholders have been sent a letter (by post) in the form attached to this announcement, which contains instructions on how to view or download a copy of the Scheme Booklet, together with a personalised proxy form for the Scheme Meeting.

A sample proxy form is attached to this announcement. In addition to the documents noted above, De Grey Shareholders who are ‘Small Shareholders’ (as defined in the Scheme Booklet) as at 7 March 2025 were sent an Opt-in Notice in the manner set out above depending on their communication preferences. A sample Opt-in Notice is attached to this announcement.

The Scheme Booklet (including the Independent Expert’s Report) is also available for viewing and downloading at www.degreymining.com.au and on De Grey’s ASX announcements page at: www.asx.com.au.

De Grey Shareholders should read the Scheme Booklet carefully and in its entirety, including the materials accompanying it, before deciding how to vote at the Scheme Meeting.

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Ground Floor, 2 Kings Park Road, West Perth WA 6005 | PO Box 84 West Perth WA 6872
E: admin@degreymining.com.au | P: +61 8 6117 9348 | F: +61 8 6117 9330
degreymining.com.au | ABN: 65 094 206 292
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Directors' recommendation

The De Grey Directors continue to unanimously recommend that De Grey Shareholders (other than Excluded Shareholders) vote in favour of the Scheme Resolution, subject only to no Superior Proposal emerging and the Independent Expert continuing to conclude in the Independent Expert’s Report that the Scheme is in the best interests of De Grey Shareholders.[1]

Scheme Meeting

The Scheme Meeting is scheduled to be held at 2:00 pm (AWST) on Wednesday, 16 April 2025 at The Melbourne Hotel, 33 Milligan Street, Perth WA 6000 and online at: https://us02web.zoom.us/webinar/register/WN_s7LS9noqTkuS6SAAKz2uhA.

Each De Grey Shareholder (other than Excluded Shareholders) who is registered on the De Grey share register as at 5:00 pm (AWST) on Monday, 14 April 2025 will be eligible to attend and vote at the Scheme Meeting.

Second Court Hearing

If the Requisite Majorities of De Grey Shareholders vote in favour of the Scheme at the Scheme Meeting, and all relevant conditions of the Scheme are satisfied or waived (as applicable), De Grey will apply to the Federal Court of Australia (Western Australia registry) for orders approving the Scheme.

Indicative Scheme timetable

The key dates expected for the Scheme are set out below.

Event	Date and Time (AWST)
Last time for proxy forms to be received for the Scheme Meeting	2:00 pm on 14 April 2025
Last time for determining eligibility to vote at the Scheme Meeting	5:00 pm on 14 April 2025
Scheme Meeting	2:00 pm on 16 April 2025
Second Court Hearing	10:15 am on 22 April 2025
Effective Date	23 April 2025
Scheme Record Date	5:00 pm on 28 April 2025
Implementation Date	5 May 2025

Note: The above times and dates are indicative only and subject to change. Among other things, dates and times following the date of the Scheme Meeting are subject to necessary approvals from the Federal Court of Australia (Western Australia

1 De Grey Shareholders should have regard to the interests of the De Grey Directors in the outcome of the Scheme which may differ from those of other De Grey Shareholders, in particular the interests disclosed in Section 3.8 of the Scheme Booklet released to ASX on 11 March 2025 .

2

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registry) and all other conditions precedent to the Scheme being satisfied or waived (as applicable). De Grey reserves the right to vary the above dates and times in consultation with Northern Star and otherwise in accordance with the Scheme Implementation Deed, and any changes will be announced by De Grey to the ASX.

Further information

If, after reading the Scheme Booklet, you have any questions about the Scheme or the Scheme Booklet, please contact the De Grey Shareholder Information Line on 1300 923 191 (within Australia) or +61 8 6288 3789 (outside Australia) between 8:30 am and 5:00 pm (Sydney time) on Monday to Friday (excluding Australian public holidays).

This announcement has been authorised for release by the De Grey Board.

For further information, please contact:

Glenn Jardine Managing Director +61 8 6117 9328 admin@degreymining.com.au	Peter Canterbury Chief Financial Officer +61 8 6117 9328 admin@degreymining.com.au	Michael Vaughan (Media enquiries) Fivemark Partners +61 422 602 720 michael.vaughan@fivemark.com.au

3

17 March 2025

Dear De Grey Shareholder

Important information – Scheme Booklet, Notice of Scheme Meeting and Proxy Form

As jointly announced by De Grey Mining Ltd (ASX: DEG, “ De Grey ”) and Northern Star Resources Ltd (ASX: NST, “ Northern Star ”) on 2 December 2024, De Grey and Northern Star have entered into a binding Scheme Implementation Deed under which it is proposed that Northern Star will acquire 100% of the shares in De Grey by way of a Court-approved scheme of arrangement under Part 5.1 of the Corporations Act 2001 (Cth) (“ Scheme ”).

The Independent Expert has concluded that the Scheme is fair and reasonable and therefore is in the best interests of De Grey Shareholders, in the absence of a superior proposal.

The De Grey Directors continue to unanimously recommend that you vote in favour of the Scheme Resolution , subject only to no Superior Proposal emerging and the Independent Expert continuing to conclude in the Independent Expert’s Report that the Scheme is in the best interests of De Grey Shareholders. De Grey Shareholders should have regard to the interests of the De Grey Directors in the outcome of the Scheme which may differ from those of other De Grey Shareholders, in particular, the interests disclosed in section 3.8 of the Scheme Booklet.

If you recently sold all of your De Grey shares, please disregard this letter.

Scheme Booklet

This letter is being sent to you because you have not elected to receive shareholder communications from De Grey electronically or in hard copy.

De Grey has prepared a Scheme Booklet explaining the terms of the Scheme, reasons for the De Grey Directors’ voting recommendations and intentions, reasons why you may wish to vote for or against the Scheme Resolution, and details of the Scheme Meeting. The Scheme Booklet also contains an Independent Expert’s Report opining on whether the Scheme is in the best interests of De Grey Shareholders.

A copy of the Scheme Booklet (including the Independent Expert’s Report and the Notice of Scheme Meeting) can be viewed and downloaded online at www.degreymining.com.au or on De Grey’s ASX Market Announcement page at www.asx.com.au under De Grey’s ticker code ‘DEG’. A personalised proxy form is enclosed with this letter.

You can also request a free hard copy of the Scheme Booklet by contacting the De Grey Shareholder Information Line on 1300 923 191 (within Australia) or +61 8 6288 3789 (outside Australia) between 8:30am and 5:00pm (Sydney time) on Monday to Friday (excluding Australian public holidays).

The Scheme Booklet contains important information relating to the Scheme and you are encouraged to read the Scheme Booklet carefully and in its entirety before deciding how to vote on the Scheme Resolution. You are also

Ground Floor, 2 Kings Park Road, West Perth WA 6005 | PO Box 84 West Perth WA 6872 | E: admin@degreymining.com.au P: +61 8 6117 9348 | F: +61 8 6117 9330 | degreymining.com.au | ABN: 65 094 206 292 | FRA Code: WKN 633879

encouraged to seek independent financial, legal, taxation or other professional advice before making an investment decision in relation to your De Grey Shares.

Unless otherwise defined, capitalised terms used in this letter have the meaning given to them in the Scheme Booklet.

Scheme Meeting

The Scheme Meeting is scheduled to be held at 2:00pm (AWST) on Wednesday, 16 April 2025 at the Melbourne Hotel, located at 33 Milligan Street, Perth WA 6000 and online at https://us02web.zoom.us/webinar/register/WN_s7LS9noqTkuS6SAAKz2uhA (see further details below).

Each De Grey shareholder on the share register as at 5:00pm (AWST) on Monday, 14 April 2025 will be entitled to attend and (other than Excluded Shareholders) vote at the Scheme Meeting.

More information about the Scheme Meeting and how to vote is set out in Section 4 of the Scheme Booklet and in the Notice of Scheme Meeting.

Your vote is important in determining whether or not the Scheme proceeds and the De Grey Directors encourage you to vote on the Scheme Resolution.

Virtual Meeting

De Grey Shareholders who wish to vote online on the day of the Scheme Meeting will need to login to the online meeting platform powered by Automic (available at www.investor.automic.com.au).

De Grey Shareholders who do not have an account with Automic are encouraged to register for an account as soon as possible and well in advance of the Scheme Meeting to avoid any delays on the day of the Scheme Meeting. An account can be created at investor.automic.com.au by clicking on ‘register’ and following the prompts. De Grey Shareholders will require their Securityholder Reference Number (SRN) or Holder Identification Number (HIN) to create an account with Automic. Further details on how to register are included in the Notice of Scheme Meeting.

De Grey Shareholders attending the Scheme Meeting online will be able to vote (see the ‘Attending and voting online’ section in the Notice of Scheme Meeting) and ask questions.

De Grey Shareholders are also encouraged to submit questions in advance of the Scheme Meeting to De Grey. Questions must be submitted by email to company.secretary@degreymining.com.au prior to 2:00pm (AWST) on Monday, 14 April 2025. Alternatively, De Grey Shareholders can ask questions when attending the Scheme Meeting in person or submit questions when attending the Scheme Meeting online.

Appointing a Proxy

Enclosed with this letter is your personalised proxy form for the Scheme Meeting.

You may appoint one proxy (or, if you are entitled to cast two or more votes at the Scheme Meeting, two proxies) to attend and vote at the Scheme Meeting on your behalf.

In order to appoint a proxy, you must deliver the signed and completed proxy form in one of the following ways:

Online	Lodge the proxy form online at https://investor.automic.com.au/#/loginsah by following the instructions:  Login to the Automic website using the holding details as shown on the proxy form.  Click on‘Meetings’ – ‘Vote’. To use the online lodgement facility, De Grey Shareholders will need their Securityholder Reference Number (SRN) or Holder Identification Number (HIN) as shown on the front of the proxy form. For further information on the online proxy lodgement process please see the Online Proxy Lodgement Guide at www.automicgroup.com.au/virtual-agms/.
By post	Post the proxy form in the reply-paid envelope provided to De Grey Mining Ltd at C/- Automic Pty Ltd, GPO Box 5193, Sydney NSW 2001
By hand	Deliver the proxy form to Automic Pty Ltd, Level 5, 126 Phillip Street, Sydney NSW 2000 during business hours (9:00am to 5:00pm (Sydney time), Monday to Friday (excluding Australian public holidays))
By fax	Fax the proxyform to Automic at +61 2 8583 3040 (both within and outside Australia).

Proxy forms must be received by the Registry by no later than 2:00pm (AWST) on 14 April 2025, being 48 hours before the commencement of the Scheme Meeting. Proxy forms received later than this time will be invalid. If the Scheme Meeting is adjourned, proxy forms must be received by the Registry at least 48 hours before the resumption of the Scheme Meeting.

The Chair of the Scheme Meeting intends to vote all valid undirected proxies which appoint (or are taken to appoint) the Chair in favour of the Scheme Resolution.

Opt-In Notice

Small Shareholders may elect to receive the Scheme Consideration in the form of New Northern Star Shares by making a valid election to receive New Northern Star Shares under the Scheme before 5:00pm (AWST) on the OptIn Notice Cut-Off Date (currently expected to be 24 April 2025).

If you are a Small Shareholder as at the Last Practicable Date (7 March 2025), or you hold nominally more than a parcel of De Grey Shares which may result in you being a Small Shareholder, an Opt-In Notice is enclosed with this letter. If you would like to make an election to receive New Northern Star Shares under the Scheme, please complete the Opt-In Notice in accordance with the instructions set out on that form and lodge a copy of the completed OptIn Notice, or if you would prefer to lodge your Opt-in Notice online, you can do so by visiting https://investor.automic.com.au/#/home.

If you believe that you are a Small Shareholder and did not receive an Opt-In Notice, please contact the Registry on 1300 441 601 (within Australia) or +61 2 9698 7164 (outside Australia) between 8:30am and 7:00pm (Sydney time), Monday to Friday (excluding Australian public holidays) or email corporate.actions@automicgroup.com.au.

For further information, please refer to section 3.4 of the Scheme Booklet.

Further questions

For further information, please refer to the Scheme Booklet (which includes the Independent Expert’s Report and the Notice of Scheme Meeting).

You may also call the De Grey Shareholder Information Line on 1300 923 191 (within Australia) or +61 8 6288 3789 (outside Australia) between 8:30am and 5:00pm (Sydney time) on Monday to Friday (excluding Australian public holidays).

For more information about your individual financial or tax circumstances, please consult your independent professional advisers.

Note: The above times and dates are indicative only and subject to change. Among other things, dates and times following the date of the Scheme Meeting are subject to necessary approvals from the Federal Court of Australia (Western Australia registry) and all other conditions precedent to the Scheme being satisfied or waived (as applicable). De Grey reserves the right to vary the above dates and times, in consultation with Northern Star and otherwise in accordance with the Scheme Implementation Deed, and any changes will be announced by De Grey to the ASX.

On behalf of the De Grey Board, I thank you for your ongoing support of De Grey, and look forward to your participation at the Scheme Meeting.

Yours faithfully,

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Simon Lill

Independent Non-Executive Chair De Grey Mining Ltd

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SUBMITYOURPROXY
Completetheformoverleafinaccordancewiththeinstructionssetoutbelow. YOUR NAMEANDADDRESS Thenameandaddressshownaboveisas itappearsontheShareRegister. Ifthisinformationisincorrect, andyouhaveanIssuerSponsoredholding,youcanupdateyouraddressthroughtheinvestorportal: https://investor.automic.com.au/#/home.DeGreyShareholderssponsoredbya brokershouldadvisetheir brokerofanychanges. STEP1 — APPOINTA PROXY IfyouwishtoappointsomeoneotherthantheChairoftheSchemeMeetingasyourproxy,pleasewritethe| nameofthatindividualorbodycorporate.A proxyneednotbea DeGreyShareholder.Otherwise ifyou leavethisboxblank,theChairoftheSchemeMeeting willbeappointedasyourproxybydefault. DEFAULTTOTHECHAIROFTHESCHEMEMEETING Anydirectedproxiesthatarenotvotedona pollattheSchemeMeetingwilldefaulttotheChairofthe SchemeMeeting,whoisrequiredtovotetheseproxiesasdirected.Anyundirectedproxiesthatdefaultto theChairoftheSchemeMeetingwillbevotedaccordingtotheinstructionssetoutinthisProxyVotingForm. STEP2 - VOTESONTHESCHEMERESOLUTION YoumaydirectyourproxyhowtovoteontheSchemeResolutionbymarkingoneoftheboxesoppositethat resolution.Allyourshareswillbevotedinaccordancewithsucha directionunlessyouindicateonlya portion ofvotingrightsaretobevotedontheSchemeResolutionbyinsertingthepercentageornumberofshares| youwishtovoteintheappropriatebox. IfyoudonotmarktheboxoppositetheSchemeResolution,your) proxymayvoteasheorshechooses. Ifyoumarkmorethanonebox,yourvoteontheSchemeResolution willbeinvalid. APPOINTMENTOFSECONDPROXY Youmayappointuptotwoproxies. Ifyouappointtwoproxies,youshouldcompletetwoseparateProxy} VotingFormsandspecifythepercentageornumberofvoteseachproxymayexercise.Ifyoudonotspecify apercentageornumber,eachproxymayexercisehalfthevotes.YoumustreturnbothProxyVotingForms together.IfyourequireanadditionalProxyVotingForm,contactAutomicRegistryServices. SIGNINGINSTRUCTIONS Individual:Wheretheholdingisinonename,theDeGreyShareholdermustsign. Jointholding:Wheretheholdingisinmorethanonename,allDeGreyShareholdersshouldsign. Powerofattorney: Ifyouhavenotalreadylodgedthepowerofattorneywiththeregistry,pleaseattacha | certifiedphotocopyofthepowerofattorneytothisProxyVotingFormwhenyoureturnit. Companies:TobesignedinaccordancewithyourConstitution.Pleasesignintheappropriateboxwhich indicatestheofficeheldbyyou. EmailAddress:Pleaseprovideyouremailaddressinthespaceprovided. Byprovidingyouremailaddress,youelecttoreceiveallcommunicationsdespatchedbyDeGrey electronically(wherelegallypermissible)suchasa NoticeofSchemeMeeting,ProxyVotingFormand AnnualReportviaemail. CORPORATEREPRESENTATIVES If arepresentativeofthecorporation istoattendtheSchemeMeetingtheappropriate‘Appointmentof CorporateRepresentative’shouldbeproducedpriortoadmission.A formmaybeobtainedfromthe Registryonlineathttps://automicgroup.com.du.	i urProxyVotingForm:
	Online Useyourcomputerorsmartphoneto appointa proxyat ~~https://investor.automic.com.au/#/loginsah~~or scantheQRcodebelowusingyour smartphone Login& Clickon‘Meetings’.Usethe |HolderNumberasshownatthetopof thisProxyVotingForm. |BYMAIL: Automic GpoOBox5193 SydneyNSW2001 INPERSON: Automic Level5,126PhillipStreet SydneyNSW2000 BYEMAIL: meetings@automicgroup.com.au BYFACSIMILE: +61235833040 AllenquiriestoAutomic: WEBSITE: https://automicgroup.com.au PHONE: 1300288 664(WithinAustralia) +61296985414(Overseas)

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De Grey Mining Ltd | ACN 094 206 292

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By Mail:

GPO Box 5193, Sydney NSW 2001

For All enquiries 1300 441 601 (within Australia) +61 2 9698 7164 (international)

[EntityRegistrationDetailsLine1Envelope] [EntityRegistrationDetailsLine2Envelope] [EntityRegistrationDetailsLine3Envelope] [EntityRegistrationDetailsLine4Envelope] [EntityRegistrationDetailsLine5Envelope] [EntityRegistrationDetailsLine6Envelope]

ASX Security Code: DEG

Holder Number (SRN/HIN): [HolderNumberMasked]

SMALL SHAREHOLDER OPT-IN NOTICE

YOUR INSTRUCTIONS MUST BE RECEIVED BY NO LATER THAN 5:00PM (AWST) ON 24 APRIL 2025

This document should be read in conjunction with the De Grey Mining Ltd Scheme Booklet dated XX XX 2025 ( Scheme Booklet ), which is available online on the De Grey Mining Ltd website (www.degreymining.com.au) and on the ASX website (https://www.asx.com.au). If you are in any doubt as to how to deal with this Opt-in Notice, you should consult your professional advisor. Capitalised terms in this Opt-in Notice have the meaning given in the Scheme Booklet which this Opt-In Notice accompanies, unless the context otherwise requires.

If you are deemed to be a Small Shareholder as at the Record Date and wish to receive your Scheme Consideration in the form of New Northern Star Shares, you should make an Opt-In Election by following the instructions set out in this form. Alternatively, if you wish to receive your portion of the Sale Proceeds from the sale of the New Northern Star Shares to which you would otherwise be entitled in cash, you do not need to make an Opt-in Election and should follow the instructions overleaf in the section titled ‘Instructions for Non-Electing Small Shareholders’.

Opt-In Method A: Online Opt-In Election (Recommended)

Visit https://investor.automic.com.au/#/home

To make an Opt-In Election online, simply scan the QR code or enter the above link into your browser.

• ✓ It’s fast and simple: Making an Opt-In Election online is very easy to do, it eliminates any postal delays and removes any potential risk of it being lost in transit.

• ✓ It’s secure and confirmed: Making an Opt-In Election online provides you with greater privacy over your instructions and provides you with confirmation that your Opt-In Election has been successfully processed.

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Existing users: If you have an existing Automic Investor Portal account with access to De Grey Mining Ltd, you do not need to register and can log in with your existing username and password at https://investor.automic.com.au

Once you are signed in, if you do not see your De Grey shareholding in your account, you can easily add it by selecting the "Add holding" button on the top right-hand corner of the screen and following the prompts.

New users: If you do not have an existing Automic account you will need to register for Investor Portal by visiting https://investor.automic.com.au/#/signup and following these steps:

1. In the Company Name field, select " De Grey Mining Ltd (DEG)"

2. Enter your Holder Number (SRN or HIN)

3. Enter the postcode (if you have an Australian address) OR click "change country" to select the country code (if you have an overseas address) relevant to your holding

4. Tick the "I'm not a robot" box and click "Next"

5. Complete the prompts to set up your Username and Password

Once you are logged in, select "Offers" from the left-hand vertical menu and follow the prompts.

Opt-In Method B: Paper Opt-In Election

STEP 1: Make your Opt-In Election:

PLEASE TICK THE BOX TO INDICATE YOU WISH TO RECEIVE THE SCHEME CONSIDERATION IN THE FORM OF NEW NORTHERN STAR SHARES

STEP 2: Sign and return this Opt-in Notice in accordance with the instructions provided:

I/We authorise you to act in accordance with my/our instructions set out above. I/We acknowledge that these instructions supersede and have priority over all previous instructions relating to this Opt-in Notice.

Individual or Securityholder 1 Securityholder 2 Securityholder 3 Sole Director or Sole Director & Director Director/Company Secretary Sole Company Secretary

~~+~~

Opt-In Method B: Signing Requirements

Individual :

Where the holding is in one name, the De Grey Shareholder must sign.

Joint holding : Where the holding is in more than one name, all of the De Grey Shareholders must sign.

Power of Attorney : If any signatory signs under Power of Attorney, please attach a certified photocopy of the Power of Attorney to this Opt-in Notice when you return it.

Companies :

To be signed in accordance with your Constitution. Please sign in the box which attests the office held by you.

Opt-In Method B: Lodging your Paper Opt-In Election

MUST BE RECEIVED BY 5:00PM (AWST) ON 24 APRIL 2025 . IMPORTANT! Opt-in Notices cannot be returned by fax. Your Opt-in Notice must be returned via one of the return methods provided below.

Due to recent changes to delivery times by Australia Post, standard delivery may now take up to ten Business Days, or longer from regional areas. De Grey Shareholders should bear this in mind when returning Opt-in Notices using Australia Post.

BY MAIL

Automic GPO Box 5193 Sydney NSW 2001

BY HAND DELIVERY (Between Sydney office hours 9:00am – 5:00pm Sydney time) Automic Level 5, 126 Phillip Street Sydney NSW 2000

Instructions for Non-electing Small Shareholders

As a Non-electing Small Shareholder you will receive your portion of the Sale Proceeds of the New Northern Star Shares which would otherwise have been issued to you under the Scheme, in cash. All New Northern Star Shares that you would otherwise have been entitled to receive will be issued to the Sale Agent for sale on your behalf and at your risk as soon as reasonably practicable. You will receive such proportion of the Sale Proceeds in Australian dollars (after deducting any applicable brokerage, foreign exchange, stamp duty and other selling costs, taxes and charges) via EFT (or, if you have not nominated a bank account to the Registry, via cheque).

To ensure you receive payment via EFT please update your payment details via the Investor Portal by visiting https://investor.automic.com.au/#/home and following the steps below:

Existing users : If you have an existing Automic Investor Portal account, with access to De Grey Mining Ltd, you do not need to register and can log in with your existing username and password at https://investor.automic.com.au. If you do not automatically see your De Grey shareholding in your account, you can easily add it by selecting the "Add holding" button on the top right-hand corner of the screen and following the prompts.

New users : If you do not have an existing Automic account you will need to register for Investor Portal by visiting https://investor.automic.com.au/#/signup and following these steps:

1. In the Company Name field, select "De Grey Mining Ltd (DEG)"

2. Enter your Holder Number (SRN or HIN) as shown on the top of this Opt-in Notice

3. Enter the postcode (if you have an Australian address) or click "change country" to select the country code (if you have an overseas address) relevant to your holding

4. Tick the "I'm not a robot" box and click "Next"

5. Complete the prompts to set up your Username and Password

Once you are logged in, select "my details" next to your holding in De Grey Mining Ltd and update your payment details.

Withdrawing your Opt-In Election

If you wish to withdraw your Opt-In Election once made, you will need to contact the Registry to obtain a Withdrawal Form. Please call 1300 441 601 (within Australia) or +61 2 9698 7164 (outside Australia) between 8:30am and 7:00pm (Sydney time), Monday to Friday (excluding Australian public holidays) or email corporate.actions@automicgroup.com.au. Withdrawal Forms must be received before 5:00pm (AWST) on the Opt-In Notice Cut-Off Date (currently expected to be 24 April 2025). If valid withdrawal instructions are not received by this time, a Small Shareholder will be treated in accordance with their election as set out in their last validly lodged Opt-In Election.