Antofagasta PLC — Proxy Solicitation & Information Statement 2025

Mar 27, 2025

The Chairman of ANTOFAGASTA PLC invites you to attend the Annual General Meeting of the Company to be held at Church House Westminster, Dean's Yard, London SW1P 3NZ on 8 May 2025 at 10.00 am.

Shareholder Reference Number

Please detach this portion before posting this proxy form.

Form of Proxy for Ordinary Shareholders - Annual General Meeting to be held on 8 May 2025

• 2. A holder may appoint more than one proxy in relation to the meeting provided that each proxy is appointed to exercise the rights attached to different shares held by the holder. To appoint more than one proxy, an additional proxy form(s) may be obtained by contacting the Registrar's helpline on +44 (0)370 702 0159 or you may photocopy this form. Please indicate in the box next to the proxy holder's name (see reverse) the number of shares in relation to which they are authorised to act as your proxy. Please also indicate by ticking the box provided if the proxy instruction is one of multiple instructions being given. All forms must be signed and should be returned together in the same envelope.
• 3. To direct your proxy how to vote on the resolutions, complete the appropriate box for each resolution overleaf. If no voting indication is given, your proxy will vote or abstain from voting at his or her discretion. If you do not direct your proxy how to vote on one or more of the resolutions, the fact that you have given this proxy may be required to be made public. Your proxy will vote (or abstain from voting) as he or she thinks fit in relation to any other matter which is put before the meeting.
• 4. The 'Vote Withheld' option overleaf is provided to enable you to abstain on any particular resolution. However, it should be noted that a 'Vote Withheld' is not a vote in law and will not be counted in the calculation of the proportion of the votes 'For' and 'Against' a resolution.
• 5. If you wish to split your vote in relation to any resolution (for example, vote some of your shares "For" that resolution and vote other shares "Against" that resolution), please contact the Registrar's helpline on +44 (0)370 702 0159 for assistance.
• 6. In the case of joint holders of a share, only the vote of the senior holder who votes (or any proxy duly appointed by him/her) will be counted by the Company. The senior holder means the joint holder that is named first in the Register of Members of the Company.

Kindly Note: This form is issued only to the addressee(s) and is specific to the All Named Holders unique designated account printed hereon. This personalised form is not transferable between different: (i) account holders; or (ii) uniquely designated accounts. The Company and Computershare Investor Services PLC accept no liability for any instruction that does not comply with these conditions.

• event of an adjournment, on the date which is two working days before the time of the adjourned meeting). Changes to entries on the Register of Members after that time shall be disregarded in determining the rights of any person to attend and vote at the meeting.
• 8. The above is how your address appears on the Register of Members. If this information is incorrect please ring the Registrar's helpline on +44 (0)370 702 0159 to request a change of address form or go to www.investorcentre.co.uk to use the online Investor Centre service.
• 9. Any alterations made to this form should be initialled.
• 10. The completion and return of this form will not preclude a member from attending the meeting and voting.
• 11. To appoint one or more proxies or to give an instruction to a proxy (whether previously appointed or otherwise) via the CREST system, CREST messages must be received by the issuer's agent (ID number 3RA50) not later than 10.00 am on 6 May 2025. For this purpose the time of receipt will be taken to be the time (as determined by the timestamp generated by the CREST system) from which the issuer's agent is able to retrieve the message. The Company may treat as invalid a proxy appointment or instruction sent by CREST in the circumstances set out in Regulation 35(5)(a) of the Uncertificated Securities Regulations 2001. Please see the AGM notice for further advice on how to appoint/instruct proxies via CREST.
• 12. When two or more valid but differing appointments of proxy are delivered or received for the same share for use at the meeting, the one which is last validly delivered or received (regardless of its date or the date of its execution) shall be treated as replacing and revoking the other or others as regards that share.
• 13. If you are acting under a power of attorney (for a corporation or otherwise), a certified copy of the power of attorney must be provided to Computershare. If you fail to do this, the appointment of your proxy may be invalid.

	Ordinary Resolutions			Vote				For Against Withheld	Vote
1.	To receive the accounts and the reports of the Directors and of the auditors for the year ended 31 December 2024.			For Against Withheld	15. To appoint Deloitte LLP as auditors of the Company to hold office from the conclusion of this meeting until the conclusion of the next
2.	To approve the Directors' and CEO's Remuneration Report for the year ended 31 December 2024.				general meeting at which the accounts are laid before the Company.
3.	To declare a final dividend.				16.	To authorise the Audit and Risk Committee for and on behalf of the
4.	To re-elect Jean-Paul Luksic as a Director.				17.	Board to determine the remuneration of the auditors. To authorise the Directors to allot securities.
5.	To re-elect Francisca Castro as a Director.					Special Resolutions
6.	To re-elect Ramón Jara as a Director.				18.	To empower the Directors to allot securities free from pre-emption rights.
7.	To re-elect Juan Claro as a Director.				19.	To empower the Directors to allot securities free from pre-emption
8.	To re-elect Andrónico Luksic as a Director.					rights for the purposes of an acquisition or a specified capital investment.
9.	To re-elect Michael Anglin as a Director.				20.	To authorise the Company to make market purchases of
10.	To re-elect Tony Jensen as a Director.				21.	ordinary shares. To permit the Company to call general meetings (other than annual
11.	To re-elect Eugenia Parot as a Director.					general meetings) on not less than 14 clear days' notice.
12.	To re-elect Heather Lawrence as a Director.
13.	To re-elect Tracey Kerr as a Director.
14.	To elect as a Director any person who has been appointed as a Director by the Board in accordance with Article 29.1 of the Company's Articles of Association after 20 March 2025 but prior to this Annual General Meeting.				Signature	In the case of a corporation, a letter of representation will be required (in accordance with S323 of the Companies Act 2006) unless this has already been lodged at registration.
	I/We hereby appoint the Chairman of the Meeting OR the person indicated in the box above as my/our proxy to attend, speak and vote in respect of my/our full voting					entitlement* on my/our behalf at the Annual General Meeting of ANTOFAGASTA PLC to be held at Church House Westminster, Dean's Yard, London SW1P 3NZ
	on 8 May 2025 at 10.00 am, and at any adjourned meeting. * For the appointment of more than one proxy, please refer to Explanatory Note 2 (see front). Please mark here to indicate that this proxy appointment is one of multiple appointments being made.					Please use a black pen. Mark with an X inside the box as shown in this example.			X
	For		Against Withheld	Vote			For	Against Withheld
	Ordinary Resolutions To receive the accounts and the reports of the Directors and of the auditors for the year ended 31 December 2024.					13. To re-elect Tracey Kerr as a Director.
	To approve the Directors' and CEO's Remuneration Report for the year ended 31 December 2024.					14. To elect as a Director any person who has been appointed as a Director by the Board in accordance with Article 29.1 of the Company's Articles of
	To declare a final dividend.					Association after 20 March 2025 but prior to this Annual General Meeting.
	To re-elect Jean-Paul Luksic as a Director.					15. To appoint Deloitte LLP as auditors of the Company to hold office from the conclusion of this meeting until the conclusion of the next general meeting at which the
	To re-elect Francisca Castro as a Director.					accounts are laid before the Company. 16. To authorise the Audit and Risk Committee for and on
	To re-elect Ramón Jara as a Director.					behalf of the Board to determine the remuneration of the auditors.
	To re-elect Juan Claro as a Director.					17. To authorise the Directors to allot securities.
	To re-elect Andrónico Luksic as a Director.					Special Resolutions 18. To empower the Directors to allot securities free from pre-emption rights.
	To re-elect Michael Anglin as a Director.					19. To empower the Directors to allot securities free from pre-emption rights for the purposes of an acquisition or
	10. To re-elect Tony Jensen as a Director.					a specified capital investment. 20. To authorise the Company to make market purchases
1. 2. 3. 4. 5. 6. 7. 8. 9.	11. To re-elect Eugenia Parot as a Director.					of ordinary shares. 21. To permit the Company to call general meetings (other than annual general meetings) on not less than 14			Vote

Signature	Date
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In the case of a corporation, this proxy must be given under its common seal or be signed on its behalf by an attorney or officer duly authorised, stating their capacity (e.g. director, secretary).

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The Chairman of ANTOFAGASTA PLC invites you to attend the Annual General Meeting of the Company to be held at Church House Westminster, Dean's Yard, London SW1P 3NZ on 8 May 2025 at 10.00 am.

Shareholder Reference Number

Please detach this portion before posting this proxy form.

Form of Proxy for Preference Shareholders - Annual General Meeting to be held on 8 May 2025

• 1. Every holder has the right to appoint some other person(s) of their choice, who need not be a shareholder, to attend, speak and vote on their behalf at the meeting. If you wish to appoint a person other than the Chairman, please insert the name of your chosen proxy holder in the space provided (see reverse).
• 2. A holder may appoint more than one proxy in relation to the meeting provided that each proxy is appointed to exercise the rights attached to different shares held by the holder. To appoint more than one proxy, an additional proxy form(s) may be obtained by contacting the Registrar's helpline on +44 (0)370 702 0159 or you may photocopy this form. Please indicate in the box next to the proxy holder's name (see reverse) the number of shares in relation to which they are authorised to act as your proxy. Please also indicate by ticking the box provided if the proxy instruction is one of multiple instructions being given. All forms must be signed and should be returned together in the same envelope.
• 3. To direct your proxy how to vote on the resolutions, complete the appropriate box for each resolution overleaf. If no voting indication is given, your proxy will vote or abstain from voting at his or her discretion. If you do not direct your proxy how to vote on one or more of the resolutions, the fact that you have given this proxy may be required to be made public. Your proxy will vote (or abstain from voting) as he or she thinks fit in relation to any other matter which is put before the meeting.
• 4. The 'Vote Withheld' option overleaf is provided to enable you to abstain on any particular resolution. However, it should be noted that a 'Vote Withheld' is not a vote in law and will not be counted in the calculation of the proportion of the votes 'For' and 'Against' a resolution.
• 5. If you wish to split your vote in relation to any resolution (for example, vote some of your shares "For" that resolution and vote other shares "Against" that resolution), please contact the Registrar's helpline on +44 (0)370 702 0159 for assistance.
• 6. In the case of joint holders of a share, only the vote of the senior holder who votes (or any proxy duly appointed by him/her) will be counted by the Company. The senior holder means the joint holder that is named first in the Register of Members of the Company.

Kindly Note: This form is issued only to the addressee(s) and is specific to the All Named Holders unique designated account printed hereon. This personalised form is not transferable between different: (i) account holders; or (ii) uniquely designated accounts. The Company and Computershare Investor Services PLC accept no liability for any instruction that does not comply with these conditions.

192855_243777_RUN_ONS/000001/000002/SG625//i

• 7. Pursuant to regulation 41 of the Uncertificated Securities Regulations 2001, entitlement to attend and vote at the meeting and the number of votes which may be cast thereat will be determined by reference to the Register of Members of the Company as at 6.00 pm on 6 May 2025 (or in the event of an adjournment, on the date which is two working days before the time of the adjourned meeting). Changes to entries on the Register of Members after that time shall be disregarded in determining the rights of any person to attend and vote at the meeting.
• 8. The above is how your address appears on the Register of Members. If this information is incorrect please ring the Registrar's helpline on +44 (0)370 702 0159 to request a change of address form or go to www.investorcentre.co.uk to use the online Investor Centre service.
• 9. Any alterations made to this form should be initialled.
• 10. The completion and return of this form will not preclude a member from attending the meeting and voting.
• 11. To appoint one or more proxies or to give an instruction to a proxy (whether previously appointed or otherwise) via the CREST system, CREST messages must be received by the issuer's agent (ID number 3RA50) not later than 10.00 am on 6 May 2025. For this purpose the time of receipt will be taken to be the time (as determined by the timestamp generated by the CREST system) from which the issuer's agent is able to retrieve the message. The Company may treat as invalid a proxy appointment or instruction sent by CREST in the circumstances set out in Regulation 35(5)(a) of the Uncertificated Securities Regulations 2001. Please see the AGM notice for further advice on how to appoint/instruct proxies via CREST.
• 12. When two or more valid but differing appointments of proxy are delivered or received for the same share for use at the meeting, the one which is last validly delivered or received (regardless of its date or the date of its execution) shall be treated as replacing and revoking the other or others as regards that share.
• 13. If you are acting under a power of attorney (for a corporation or otherwise), a certified copy of the power of attorney must be provided to Computershare. If you fail to do this, the appointment of your proxy may be invalid.

	Ordinary Resolutions		Vote
1.	To receive the accounts and the reports of the Directors and of the auditors for the year ended 31 December 2024.		For Against Withheld
2.	To approve the Directors' and CEO's Remuneration Report for the year ended 31 December 2024.
3.	To declare a final dividend.
4.	To re-elect Jean-Paul Luksic as a Director.
5.	To re-elect Francisca Castro as a Director.
6.	To re-elect Ramón Jara as a Director.
7.	To re-elect Juan Claro as a Director.
8.	To re-elect Andrónico Luksic as a Director.
9.	To re-elect Michael Anglin as a Director.
10.	To re-elect Tony Jensen as a Director.
11.	To re-elect Eugenia Parot as a Director.
12.	To re-elect Heather Lawrence as a Director.
13.	To re-elect Tracey Kerr as a Director.
14.	To elect as a Director any person who has been appointed as a Director by the Board in accordance with Article 29.1 of the

Company's Articles of Association after 20 March 2025 but prior to

			Vote
			For Against Withheld
15.	To appoint Deloitte LLP as auditors of the Company to hold office from the conclusion of this meeting until the conclusion of the next general meeting at which the accounts are laid before the Company.
16.	To authorise the Audit and Risk Committee for and on behalf of the Board to determine the remuneration of the auditors.
17.	To authorise the Directors to allot securities.
	Special Resolutions
18.	To empower the Directors to allot securities free from pre-emption rights.
19.	To empower the Directors to allot securities free from pre-emption rights for the purposes of an acquisition or a specified capital investment.
20.	To authorise the Company to make market purchases of ordinary shares.

21. To permit the Company to call general meetings (other than annual general meetings) on not less than 14 clear days' notice.

Signature

In the case of a corporation, a letter of representation will be required (in accordance with S323 of the Companies Act 2006) unless this has already been lodged at registration.

Form of Proxy

this Annual General Meeting.

Please complete this box only if you wish to appoint a third party proxy other than the Chairman. Please leave this box blank if you want to select the Chairman. Do not insert your own name(s).

I/We hereby appoint the Chairman of the Meeting OR the person indicated in the box above as my/our proxy to attend, speak and vote in respect of my/our full voting entitlement* on my/our behalf at the Annual General Meeting of ANTOFAGASTA PLC to be held at Church House Westminster, Dean's Yard, London SW1P 3NZ on 8 May 2025 at 10.00 am, and at any adjourned meeting.

*

	* For the appointment of more than one proxy, please refer to Explanatory Note 2 (see front). Please mark here to indicate that this proxy appointment is one of multiple appointments being made.		Please use a black pen. Mark with an X inside the box as shown in this example.
	Ordinary Resolutions	For	Vote Against Withheld				For		Vote Against Withheld
1.	To receive the accounts and the reports of the Directors and of the auditors for the year ended 31 December 2024.				13. To re-elect Tracey Kerr as a Director.
2.	To approve the Directors' and CEO's Remuneration Report for the year ended 31 December 2024.				14. To elect as a Director any person who has been appointed as a Director by the Board in accordance with Article 29.1 of the Company's Articles of
3.	To declare a final dividend.				Association after 20 March 2025 but prior to this Annual General Meeting.
4.	To re-elect Jean-Paul Luksic as a Director.				15. To appoint Deloitte LLP as auditors of the Company to hold office from the conclusion of this meeting until the conclusion of the next general meeting at which the
5.	To re-elect Francisca Castro as a Director.				accounts are laid before the Company.
6.	To re-elect Ramón Jara as a Director.				16. To authorise the Audit and Risk Committee for and on behalf of the Board to determine the remuneration of the auditors.
7.	To re-elect Juan Claro as a Director.				17. To authorise the Directors to allot securities. Special Resolutions
8.	To re-elect Andrónico Luksic as a Director.				18. To empower the Directors to allot securities free from pre-emption rights.
9.	To re-elect Michael Anglin as a Director.				19. To empower the Directors to allot securities free from pre-emption rights for the purposes of an acquisition or
	10. To re-elect Tony Jensen as a Director.				a specified capital investment.
	11. To re-elect Eugenia Parot as a Director.				20. To authorise the Company to make market purchases of ordinary shares.
					21. To permit the Company to call general meetings (other
	12. To re-elect Heather Lawrence as a Director.				than annual general meetings) on not less than 14 clear days' notice.
	I/We instruct my/our proxy as indicated on this form. Unless otherwise instructed the proxy may vote as he or she sees fit or abstain in relation to any business of the meeting.

Signature Date

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In the case of a corporation, this proxy must be given under its common seal or be signed on its behalf by an attorney or officer duly authorised, stating their capacity (e.g. director, secretary).

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