TR-1 - Notifications/Shares

RNS Number:4935G
Alcan Inc
26 October 2007


TR-1: Notifications of Major Interests in Shares

1. Identity of the issuer or the underlying issuer of
existing shares to which voting rights are attached:      Alcan Inc.
                                                          (Secondary listing of common shares in London)

2. Reason for notification (yes/no)
                                                                                  
An acquisition or disposal of voting rights                                        Yes
                                                                                   
An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached            No
                                                                                   
An event changing the breakdown of voting rights                                    No

Other (please specify):______________
                                                 

3. Full name of person(s) subject to             Rio Tinto plc
notification obligation:                         6 St James's Square
                                                 London, SW1Y 4LD
                                                 
4. Full name of shareholder(s) (if different     Rio Tinto Canada Holding Inc.
from 3):                                         770 Sherbrooke Street West
                                                 Suite 1800
                                                 Montreal, Quebec, H3A 1G1

5. Date of transaction (and date on which the
threshold is crossed or reached if different):   25/10/07
                                                 
6. Date on which issuer notified:                25/10/07
                                                 
7. Threshold(s) that is/are crossed or reached:  75%



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8: Notified Details
A: Voting rights attached to shares


Class/type of     Situation previous to the Resulting situation after the triggering transaction
shares            triggering transaction

If possible use   Number of    Number of    Number of     Number of voting rights  Percentage of voting
ISIN code         shares       voting       shares                                 rights
                               rights

                                                          Direct      Indirect     Direct      Indirect
                  0            0
Ordinary                                    298,759,000   0           298,759,000  0           79.41
CA0137161059



B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial Expiration date   Exercise/         No. of voting     Percentage of voting rights
instrument                          conversion period rights that may
                                    /date             be acquired (if
                                                      the instrument
                                                      exercised/
                                                      converted)




Total (A+B)

Number of voting rights                      Percentage of voting rights

298,759,000                                  79.41






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



Proxy Voting:


10. Name of 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:


14 Contact name:                             Ben Mathews, Company Secretary, Rio Tinto plc


15. Contact telephone name:                  [phone]






                      This information is provided by RNS
            The company news service from the London Stock Exchange
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