Antofagasta PLC — Proxy Solicitation & Information Statement 2024

Mar 28, 2024

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 2024 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 2024

Computershare Investor Services PLC, The Pavilions, Bristol BS99 6ZY by 3 May 2024 at 10.00 am.

Explanatory Notes:

• 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)
• 1. 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.
• 1. 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.
• 1. 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.
• 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.
• 1. 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 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.

• 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 3 May 2024 (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.
• 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.
• कं Any alterations made to this form should be initialled
• 1. The completion and return of this form will not preclude a member from attending and voting.
• 1. 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 3 May 2024. 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 Requlation 35(5)(a) of the Uncertificated Securities Requlations 2001. Please see the AGM notice for further advice on how to appoint/instruct proxies via CREST
• 1. 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 the other or other or others as regards that share
• 1. 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

All Named Holders

	Ordinary Resolutions	For	Against Withhe	Vote
	1. To receive the accounts and the reports of the Directors and of the auditors for the year ended 31 December 2023.
2.	To approve the Directors' and CEO's Remuneration Report for the year ended 31 December 2023.
3.	To declare a final dividend.
ব	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 Vivianne Blanlot as a Director.
10.	To re-elect Michael Anglin as a Director
	11. To re-elect Tony Jensen as a Director.
	12 To re-elect Eugenia Parot as a Director.
	13. To re-elect Heather Lawrence as a Director.
	14. To re-elect Tracey Kerr 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 accounts are laid before
	the Company.

	And Comments of Children Comments of Children Comments of Children
	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.

Against Withheld

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

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 person indicated in the box above as myour proxy to attend, speak and vote in respect of my/our full voting entilement* on myour behalf at the Annual General Meeting of ANTOFAGASTA PLC to be held at Church House Westminster, Dear's YVZ SNZ on 8 May 2024 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 2023					13. To re-elect Heather Lawrence as a Director.
	2. To approve the Directors' and CEO's Remuneration Report for the year ended 31 December 2023.				14	To re-elect Tracey Kerr as a Director.
3.	To declare a final dividend.					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
ব	To re-elect Jean-Paul Luksic as a Director To re-elect Francisca Castro 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.
6.	To re-elect Ramón Jara as a Director					17. To authorise the Directors to allot securities. Special Resolutions
	To re-elect Juan Claro as a Director					18. To empower the Directors to allot securities free from pre-emption rights
8.	To re-elect Andrónico Luksic as a Director					19. To empower the Directors to allot securities free from pre-emption rights for the purposes of an acquisition or a specified capital investment.
	To re-elect Vivianne Blanlot as a Director					20. To authorise the Company to make market purchases of ordinary shares
	10. To re-elect Michael Anglin as a Director					21. To permit the Company to call general meetings (other
	11. To re-elect Tony Jensen as a Director.					than annual general meetings) on not less than 14 clear days' notice.
	12. To re-elect Eugenia Parot as a Director.
	IPVe instruct myour proxy as indicated on this form. Intructed the proxy may vote as he or she sees fit or abstain in realing.

Signature

Date

DD/MM/YY

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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