For filings with the FCA include the annex

For filings with issuer exclude the annex

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: ii		ANTOFAGASTA PLC
2 Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights			X
An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments
An event changing the breakdown of voting rights
Other (please specify):
3. Full name of person(s) subject to the notification obligation: iii	Commonwealth Bank of Australia on behalf of the controlled undertaking; Colonial First State Investments Limited First State Investments (Singapore) Realindex Investments Pty Limited First State Investment Management (UK) Limited Colonial First State Asset Management (Australia) Limited First State Investments International Limited
4. Full name of shareholder(s) (if different from 3.):iv
5. Date of the transaction and date on which the threshold is crossed or reached: v	20th October 2016
6. Date on which issuer notified:	21st October 2016
7. Threshold(s) that is/are crossed or reached: vi, vii	>3%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type of shares

if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number

of Voting Rights

Number

of shares

Number of voting

rights

% of voting rights x

Direct

Indirect

xii

Direct

Indirect

GB0000456144

29,560,846

29,583,487

3.00%

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date xiii	Exercise/ Conversion Period xiv	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

Total (A+B+C)

Number of voting rights

Percentage of voting rights

29,583,487

3.00%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: xxi

Colonial First State Investments Limited - 231,616 - 0.02% First State Investments (Singapore) - 18,848,369 - 1.91% Realindex Investments Pty Limited - 216,667 - 0.02%

First State Investment Management (UK) Limited - 2,695,247 - 0.27% Colonial First State Asset Management (Australia) Limited - 2,709,696 - 0.27% First State Investments International Limited - 4,881,892 - 0.5%

Proxy Voting:
10. Name of the proxy holder:
11. Number of voting rights proxy holder will cease to hold:
12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

Please be advised 985,856,695 was used as the denominator.

14. Contact name:

Renato Stupar

15. Contact telephone number:

M: +61 47 594 5221 / renato.stupar@cba.com.au

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

xv, xvi

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date xvii

Exercise/ Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix,

xx