UBS AG (EPT) - EPT Disclosure

RNS Number:0969S
UBS AG (EPT)
10 April 2008

FORM 38.5(b)

DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS

WITHOUT RECOGNISED INTERMEDIARY STATUS, OR WITH RI STATUS

BUT NOT DEALING IN A CLIENT-SERVING CAPACITY

(Rule 38.5(b) of the Takeover Code)

1. KEY INFORMATION

Name of exempt principal trader UBS Securities LLC
Company dealt in Rio Tinto PLC

(ISIN US7672041008)
Class of relevant security to which the
dealings being disclosed relate (Note 1)
Ordinary shares dealt in ADR form

ADR (1 ADR = 4 Ords)

Date of dealing 09 APRIL 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 2)

Long Short
Number (%) Number (%)
(1) Relevant securities 16832 Ords - 4556 Ords 0.00
(equivalent (equivalent
to 4208 ADRs) to 1139 ADRs)
(2) Derivatives (other than - - - -
options)
(3) Options and agreements to 0 Ords - 0 Ords -
purchase/sell (equivalent (equivalent
to 0 ADRs to 0
ADRs)

Total 16832 Ords - 4556 0.00
(equivalent Ords
to 4208 (equivalent
to 1139
ADRs ADRs)

(b) Interests and short positions in relevant securities of

the company, other than the class dealt in (Note 2)

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 2)
Class of relevant security: Details

3. DEALINGS (Note 3)

(a) Purchases and sales

Buy/Sell Equivalent Trade Price (USD)
Ord Quantity
B 5768 472.846
B 1200 472.29
B 23640 471.745
B 1600 471.975
B 20324 473.25
B 23420 471.928
S 100 470.81
S 4608 472.519
S 8916 471.409
S 20568 473.24
S 400 474.05
S 15020 471.772
S 3200 468.845
S 23140 472.564
Total Buys 75952
Total Sells 75952

(b) Derivatives transactions (other than options)
Product name, e.g Long/short (Note 5) Number of securities Price per unit
CFD (Note 6) (Note 4)

(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

Product Writing, Number of Exercise Type, e.g. Expiry Option
name,e.g. selling, securities price American, date money paid/
call purchasing, to which the European received per
option varying etc option etc. unit (Note
relates 4)
(Note 6)

(ii) Exercising

Product name, e.g. call Number of securities Exercise price per unit
option (Note 4)

(d) Other dealings (including new securities) (Note 3)

Nature of transaction Details Price per unit (if applicable)
(Note 7)

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.

..............................................................................

..............................................................................

Is a Supplemental Form 38.5(b) attached? (Note 8)
NO

Date of disclosure 10 APRIL 2008
Contact name Richard Mulcahy
Telephone number 203 719 0467
Name of offeree/offeror with which connected BHP Billiton
Nature of connection (Note 9) Connected Adviser

Notes

The Notes on Form 38.5(b) 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
END

EMMBSGDSCDBGGIG