UBS Sec. Australia - EPT Disclosure

RNS Number:0581S
UBS Securities Australia Limited
10 April 2008

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 Australia Limited

Company dealt in Rio TInto Ltd

Class of relevant security to which the Ordinary
dealings being disclosed relate (Note 1)

Date of dealing 9th 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 340,736 0.07% 3,066,612 0.67%

(2) Derivatives (other than options)

(3) Options and agreements to purchase/sell 1,400,995 0.31% 838,852 0.18%

Total 1,741,731 0.38% 3,905,464 0.85%

(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

Purchases/Sales Number of securities Price per unit
(AUD) (Note 4)
Purchases 392 137.21
Purchases 532 137.21
Purchases 76 137.2
Purchases 173 137.88
Purchases 45 137.88
Purchases 392 137.21
Purchases 12 137.27
Purchases 7 137.3
Purchases 11 137.3
Purchases 23 137.3
Purchases 54 137.3
Purchases 446 137.3
Purchases 294 137.45
Purchases 471 137.88
Purchases 1 137.88
Purchases 24 137.88
Purchases 500 139.55
Purchases 500 139.55
Purchases 1000 139.8
Purchases 562 139.85
Purchases 438 139.85
Purchases 873 139.88
Purchases 27 139.88
Purchases 100 139.88
Purchases 725 139.75
Purchases 90 139.75
Purchases 171 139.75
Purchases 1014 139.72
Sales 2000 137.88
Sales 40 137.88
Sales 632 137.88
Sales 2328 137.88
Sales 173 137.88
Sales 45 137.88
Sales 392 137.21
Sales 3 137.12
TOTAL PURCHASES 8953
TOTAL SALES 5613

(b) Derivatives transactions (other than options)

Product name, Long/short (Note 5) Number of securities (Note 6) Price per unit (Note 4)
e.g. 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 date Option money
e.g. call option selling, securities to which price American, paid/received
purchasing, the option relates European etc per unit
varying etc. (Note 6) (Note 4)

Call option Purchasing 7000 136 American 26-Jun-08 11
Call option Purchasing 1000 136 American 26-Jun-08 10.95
Call option Purchasing 1000 136 American 26-Jun-08 10.95
Call option Purchasing 1000 136 American 26-Jun-08 10.95
Call warrant Purchasing 4 120 European 26-Jun-08 23.45
Call warrant Selling 370 120 European 26-Jun-08 23.71
Put option Selling 186 78.43 American 28-Jul-11 3.2
Put option Purchasing 186 78.43 American 28-Jul-11 3.2
Put option Purchasing 186 78.43 American 28-Jul-11 3.2

(ii) Exercising

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

Nature of transaction (Note 7) Details Price per unit (if applicable) (Note 4)

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) YES

Date of disclosure 10th April 2008

Contact name Belinda Maclay

Telephone number 61 2 93242944

Name of offeree/offeror with which connected BHP Billiton Plc/
BHP Billiton Limited

Nature of connection (Note 9) Connected advisor

Notes

The Notes on Form 38.5(b) can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk

SUPPLEMENTAL FORM 38.5(b)

DETAILS OF OPEN POSITIONS
(This form should be attached to Form 38.5(b))

OPEN POSITIONS (Note 1)

Product name, Written or Number of Exercise Type, e.g. Expiry date
e.g. call purchased securities to which price (AUD) American,
option the option or (Note2) European, etc
derivatives relates

Call option Purchased 1000 122 American 23-Apr-08
Call option Purchased 5000 160 American 26-Jun-08
Call option Purchased 40000 134 American 23-Apr-08
Call option Purchased 10000 136 American 26-Jun-08
Call option Purchased 75000 134 American 26-Jun-08
Call option Purchased 21000 130 American 23-Apr-08
Call option Purchased 80000 128 American 23-Apr-08
Call option Purchased 1000 114.74 European 19-Jun-09
Call option Purchased 20000 138 American 23-Apr-08
Call option Purchased 30000 126 American 23-Apr-08
Call option Purchased 14000 120 European 26-Jun-08
Call option Purchased 27000 96 European 06-Nov-08
Call warrant Written 1550 0 American 30-Jun-14
Call option Written 5000 140 American 26-Jun-08
Call option Written 20000 153.52 American 23-Apr-08
Call option Written 28000 136 American 23-Apr-08
Call option Written 14000 120 European 26-Jun-08
Call option Written 27000 96 European 06-Nov-08
Call warrant Written 366 120 European 26-Jun-08
Call warrant Written 4754 56.5 European 27-May-08
Call warrant Written 5952 96 European 06-Nov-08
Call warrant Written 3230 55 European 18-Jun-09
Call option Written 100000 130 American 23-Apr-08
Put option Purchased 3000 115 American 23-Apr-08
Put option Purchased 1000 108 American 23-Apr-08
Put option Purchased 50000 62 American 26-Jun-08
Put option Purchased 5000 100 American 26-Jun-08
Put option Purchased 20000 122 American 23-Apr-08
Put option Purchased 75000 124 American 26-Jun-08
Put option Purchased 150000 132 American 25-Sep-08
Put option Purchased 75000 110 American 18-Dec-08
Put option Purchased 150000 77 American 22-Dec-11
Put option Purchased 100000 90 American 26-Jun-08
Put option Written 1000 160 American 26-Jun-08
Put option Written 2000 112 American 23-Apr-08
Put option Written 7000 140 American 26-Jun-08
Put option Written 1000 150 American 26-Jun-08
Put option Written 232000 66 American 26-Jun-08
Put option Written 831 96.8 American 28-Jun-12
Put option Written 200000 80 American 26-Jun-08
Put option Written 591 95.3 American 29-Jul-10
Put option Written 650 92.25 American 12-Jun-12
Put option Written 125 99.48 American 29-Jul-10
Put option Written 1628 102.26 American 24-Jun-10
Put option Written 562 99.67 American 29-Jul-10
Put option Written 704 78.59 American 15-May-08
Put option Written 733 102.26 American 28-Jun-12
Put option Written 209 81.14 American 28-Apr-11
Put option Written 181 101 American 29-Jul-10
Put option Written 366 81.82 American 14-May-08
Put option Written 4434 78.23 American 30-Jun-11
Put option Written 371 99.3 American 29-Jul-10
Put option Written 300 71.7 American 02-Jan-09
Put option Written 20000 120.15 American 23-Apr-08
Put option Written 1500 78.2 American 22-Mar-10
Put option Written 164 91.04 American 11-May-12
Put option Written 158 99.12 American 29-Jul-10
Put option Written 3685 76.01 American 30-Jun-11
Put option Written 2739 94.91 American 29-Jul-10
Put option Written 126 99.07 American 07-Sep-12
Put option Written 131 94.91 American 26-Jul-12
Put option Written 115 88.74 American 05-Aug-10
Put option Written 157 99.86 American 29-Jul-10
Put option Written 78 127 American 31-Jan-13
Put option Written 4058 78 American 28-Jul-11
Put option Written 1175 42.5 American 27-Jan-10
Put option Written 71000 110 American 25-Sep-08
Put option Written 555 45.04 American 22-Jun-10
Put option Written 227 44.05 American 22-Jun-10
Put option Written 1281 43.4 American 21-Jun-10
Put option Written 701 42.79 American 04-Jun-10
Put option Written 130 76.73 American 25-Jun-08
Put option Written 203 98.47 American 22-Jun-10
Put option Written 941 42.5 American 03-Jun-10
Put option Written 566 35.33 American 22-Jun-09
Put option Written 567 35.27 American 19-Jun-09
Put option Written 573 34.9 American 18-Jun-09
Put option Written 429 34.96 American 18-Jun-09
Put option Written 353 70.82 American 09-Feb-09
Put option Written 419 71.59 American 19-Jan-09
Put option Written 175 57.14 American 24-Sep-08
Put option Written 742 53.8 American 17-Sep-08
Put option Written 794 75.5 American 23-Jun-11
Put option Written 598 83.69 American 22-Jun-12
Put option Written 1003 43.86 American 26-Jun-08
Put option Written 564 90.39 American 22-Jun-12
Put option Written 454 44.05 American 26-Jun-08
Put option Written 176 113.21 American 25-Oct-12
Put option Written 119 83.55 American 11-Aug-10
Put option Written 8721 78.86 American 28-Jul-11
Put option Written 663 75.36 American 23-Jun-11
Put option Written 4931 78.43 American 28-Jul-11
Put option Written 518 96.51 American 31-May-12
Put option Written 460 109.66 American 31-Jan-13
Put option Written 152 98.36 American 28-Jun-12
Put option Written 628 99.44 American 29-Jul-10
Put option Written 2264 110.36 American 24-Jun-09
Put option Written 528 75.48 American 29-Jun-11
Put option Written 547 109.66 American 27-Jan-11
Put option Written 491 33.6 American 19-May-08
Put option Written 500 33.2 American 16-May-08
Put option Written 3675 85.7 American 22-Jun-12
Put option Written 353 42.49 American 08-May-08
Put option Written 91 109 American 22-Jan-09
Put option Written 815 98.29 American 30-Jun-08
Put option Written 1558 48.13 American 25-Jun-08
Put option Written 271 73.66 American 10-Jun-09
Put option Written 1656 77.02 American 30-Jun-11
Put option Written 561 44.56 American 25-Jun-08
Put option Written 1291 77.44 American 30-Jun-11
Put option Written 869 75.44 American 23-Jun-11
Put option Written 870 97.65 American 22-Jun-12
Put option Written 1407 44.42 American 25-Jun-08
Put option Written 524 43.89 American 24-Jun-08
Put option Written 356 70.14 American 10-Jun-09
Put option Written 341 43.98 American 24-Jun-08
Put option Written 16695 102.42 American 29-Jun-12
Put option Written 1360 73.51 American 28-Jul-11
Put option Written 452 44.24 American 24-Jun-08
Put option Written 1418 91.6 American 29-Jul-10
Put option Written 797 43.91 American 24-Jun-08
Put option Written 465 98.9 American 28-Jun-12
Put option Written 472 90.6 American 29-Jul-10
Put option Written 576 43.4 American 23-Jun-08
Put option Written 626 28.75 American 23-Jun-08
Put option Written 150000 79 American 22-Dec-11
Put option Written 1806 101.45 American 26-Jul-12
Put option Written 343 29.15 American 20-Jun-08
Put option Written 425 78.61 American 30-Jun-11
Put option Written 4983 50.17 American 19-Jun-08
Put option Written 1600 77.2 American 25-Feb-10
Put option Written 637 47.09 American 18-Jun-08
Put option Written 448 44.64 American 17-Jun-08
Put option Written 514 77.75 American 30-Jun-11
Put option Written 5380 29.73 American 17-Jun-08
Put option Written 663 75.38 American 25-Jun-09
Put option Written 286 91.6 American 30-Aug-12
Put option Written 663 30.16 American 12-Jun-08
Put option Written 130 76.7 American 19-May-11
Put option Written 457 43.76 American 12-Jun-08
Put option Written 887 98.08 American 28-Jun-12
Put option Written 828 98.9 American 29-Jul-10
Put option Written 214 93.26 American 28-Jun-12
Put option Written 232 43.1 American 03-Jun-08
Put option Written 325 77.02 American 21-May-09
Put option Written 1594 100.35 American 26-Jul-12
Put option Written 271 73.76 American 05-Jun-09
Put option Written 1441 99.64 American 29-Jul-10
Put option Written 198 100.52 American 16-Jun-10
Put option Written 203 98.08 American 22-Jun-10
Put option Written 1083 92.25 American 28-Jun-12
Put option Written 1062 98.28 American 28-Jun-12
Put option Written 1040 96.14 American 26-May-10
Put option Written 3883 77.32 American 30-Jun-11
Put option Written 821 103.41 American 22-Jun-12
Put option Written 159 78.2 American 23-Jun-09
Put option Written 1080 101.81 American 29-Jul-10
Put option Written 3905 102.41 American 29-Jul-10
Put option Written 1787 100.7 American 26-Jul-12
Put option Written 154 129.41 American 11-Dec-12
Put option Written 3013 101.81 American 26-Jul-12
Put option Written 676 74.05 American 12-Jun-08
Put option Written 2450 76.54 American 28-Jul-11
Put option Written 352 98.21 American 29-Jul-10
Put option Written 680 73 American 12-Jun-08
Put option Written 159 78.31 American 21-Jun-11
Put option Written 1639 103.64 American 26-Jul-12
Put option Written 243 102.51 American 26-Jul-12
Put option Written 128 77.89 American 21-Jun-11
Put option Written 510 98 American 29-Jul-10
Put option Written 132 97.5 American 02-Jul-12
Put option Written 246 101.6 American 24-Jun-10
Put option Written 836 99.24 American 15-Jun-10
Put option Written 105000 134 American 26-Jun-08
Put option Written 127 98.35 American 22-Jun-10
Put option Written 298 100.5 American 25-Jun-10
Put option Written 150 99.59 American 29-Jul-10
Put option Written 1000 76 American 14-Jun-11
Put option Written 218 100.49 American 28-Jun-12
Put option Written 283 78.34 American 19-Oct-11
Put option Written 634 78.7 American 27-May-09
Put option Written 538 99.08 American 26-Jul-12
Put option Written 363 82.51 American 28-Apr-09
Put option Written 265 75.38 American 22-Jun-11
Put option Written 125 99.59 American 28-Jun-12
Put option Written 2719 99.08 American 29-Jul-10
Put option Written 146 98.79 American 29-Jul-10
Put option Written 158 78.77 American 24-Jun-11
Put option Written 396 75.01 American 08-Mar-10
Put option Written 240 83.48 American 18-Apr-11
Put option Written 1008 99.09 American 18-Jun-10
Put option Written 1334 74.99 American 22-Jun-11
Put option Written 601 99.71 American 25-Jun-10
Put option Written 1902 98.51 American 28-Jun-12
Put option Written 696 99.01 American 26-Jul-12
Put option Written 413 96.82 American 24-Jun-10
Put option Written 413 96.75 American 21-Jun-12
Put option Written 404 98.86 American 24-Jun-10
Put option Written 296 67.43 American 15-Sep-09
Put option Written 706 99.04 American 25-Jun-10
Put option Written 1500 78.39 American 23-Mar-10
Put option Written 2515 98.79 American 26-Jul-12
Put option Written 648 97.31 American 24-Jun-09
Put option Written 3628 67.79 American 29-Sep-11
Put option Written 382 98 American 26-Jul-12
Put option Written 2746 72.82 American 24-Jun-11
Put option Written 1000 76.49 American 19-Jun-09
Put option Written 1512 99.17 American 25-Jun-10
Put option Written 1588 99.88 American 26-Jul-12
Put option Written 305 75.25 American 25-Jun-09
Put option Written 2716 78.99 American 28-Jul-11
Put option Written 484 103.17 American 26-Jul-12
Put option Written 1038 76.08 American 30-Jun-11
Put option Written 1020 74.54 American 01-Aug-11
Put option Written 1257 99.37 American 28-Jun-12
Put option Written 509 98.07 American 29-Jul-10
Put option Written 146 102.05 American 26-Jul-12
Put option Written 310 96.73 American 23-Jun-10
Put option Written 982 74.85 American 30-Jun-11
Put option Written 600 73.45 American 30-Jun-11
Put option Written 257 76.5 American 17-Jun-11
Put option Written 434 98.52 American 29-Jul-10
Put option Written 400 74.9 American 22-Jun-11
Put option Written 703 85.3 American 22-Jun-12
Put option Written 73 135.65 American 22-Feb-11
Put option Written 100000 118 American 23-Apr-08

Notes

1. Where there are open option positions or open derivative positions (except
for CFDs), full details should be given. Full details of any existing
agreements to purchase or to sell should also be given on this form.

2. For all prices and other monetary amounts, the currency must be stated.

For details of the Code's dealing disclosure requirements, see Rules 8 and 38.5
and their Notes which 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

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