BlackRock Group - Rule 8.3- Rio Tinto Limited

RNS Number:1779R
BlackRock Group
31 March 2008

FORM 8.3

DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE

(Rule 8.3 of the City Code on Takeovers and Mergers)

1. KEY INFORMATION

Name of person dealing (Note 1) BlackRock Group
Company dealt in Rio Tinto Limited
Class of relevant security to which the NPV Ordinary shares
dealings being disclosed relate (Note 2)
Date of dealing 28th March 2008

2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a) Interests and short positions (following dealing) in the class of relevant security dealt in (Note 3)

Long Short
Number (%) Number (%)
(1) Relevant securities 4,640,466 1.01%
(2) Derivatives (other than options) 94,255 0.02%
(3) Options and agreements to purchase/sell
Total 4,734,721 1.03%

(b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3)

Class of relevant security: Long Short
Number (%) Number (%)
(1) Relevant securities
(2) Derivatives (other than options)
(3) Options and agreements to purchase/sell
Total

(c) Rights to subscribe (Note 3)

Class of relevant security: Details

3. DEALINGS (Note 4)

(a) Purchases and sales
Purchase/sale Number of securities Price per unit (Note 5)

Purchase 60 Aus$ 121.6475
Purchase 1,191 Aus$ 122.90
Sale 100 Aus$ 119.77

(b) Derivatives transactions (other than options)

Product name, e.g. Long/short (Note 6) Number of securities (Note 7) Price per unit (Note 5)
CFD

(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying
Product name Writing, Number of Exercise Type, e.g. Expiry Option money paid/
e.g. call selling, securities to price American, date received per unit
option purchasing, which the European (Note 5)
varying etc. option relates etc.
(Note 7)

(ii) Exercising

Product name, e.g. call option Number of securities Exercise price per unit (Note 5)

(d) Other dealings (including new securities) (Note 4)

Nature of transaction (Note 8) Details Price per unit (if applicable)
(Note 5)

4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person
disclosing and any other person relating to the voting rights of any relevant
securities under any option referred to on this form or relating to the voting
rights or future acquisition or disposal of any relevant securities to which any
derivative referred to on this form is referenced. If none, this should be
stated.

None...........................................................................
............................................................

Is a Supplemental Form 8 attached? (Note 9)
NO

Date of disclosure 31st March 2008

Contact name Louise Lyle
Telephone number 0131 472 7472
If a connected EFM, name of offeree/offeror with which BHP Billiton
connected
If a connected EFM, state nature of connection (Note 10) Category 2

Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk

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