Citigroup GM Aust. - EPT Disclosure

RNS Number:0640S
Citigroup GM Australia Pty Ltd
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 Citigroup Global Markets Australia Pty Limited

Company dealt in Rio Tinto Ltd

Class of relevant security to which the Ord/Equity
dealings being disclosed relate (Note 1)

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 422,965 (0.08%) 310,442 (0.07%)

(2) Derivatives (other than options) (0.00%) (0.00%)

(3) Options and agreements to purchase/sell 894,803 (0.20%) 1,245,761 (0.24%)

Total 1,264,325 (0.28%) 1,576,284 (0.31%)

(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
Convertible Number Number
(%) (%)

(1) Relevant securities (0.00%) (0.00%)

(2) Derivatives (other than options) (0.00%) (0.00%)

(3) Options and agreements to purchase/sell (0.00%) (0.00%)

Total (0.00%) (0.00%)

(c) Rights to subscribe (Note 2)

Class of relevant security: Details

3. DEALINGS (Note 3)

(a) Purchases and sales

Purchase Number of securities Price per unit (Note 4)
AUD (unless stated)

50000 139
19481 137.88
6494 137.88
3000 139
2000 136.75
2000 137.5
1258 137.88
1000 137.88
650 139.08
500 137.5
405 139
396 139
280 139.08
200 137.5
168 139
100 138.94
100 139
100 137.88
86 138.89
74 137.88
65 137.88
38 138.89
5 139
4 138.87
3 138.87
3 137.88
1 139.72
1 139.72
1 139.67
1 139.67
1 138.97
1 139.05
1 139.05
1 139.05
1 139.05
1 138.91
1 138.81
1 138.95
1 138.95
1 138.95
1 138.95
1 137.98
1 136.72
1 137.25
1 137.28
1 137.28
Total 88,430

Sales Number of securities Price per unit (Note 4)
AUD (unless stated)

-1 139
-1 139.73
-1 139.62
-1 139.62
-1 139.62
-1 138.98
-1 138.98
-1 139
-1 139.01
-1 139
-1 138.91
-1 138.82
-1 138.82
-1 138.82
-1 138.82
-1 138.81
-1 137.98
-1 136.72
-1 137.26
-1 137.26
-1 137.26
-25 138.21
-196 140
-210 139.18
-720 139.18
-861 137.88
-1075 138.2
-1500 137.75
-1500 137.9
-2304 140
-6494 137.88
Total 14,906

(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 Option money
selling, securities to American, date paid/received
e.g. call option purchasing, which the option Price (AUD) European etc. per unit (AUD)
varying etc. relates (Note 6) (Note 4)
(C = call
option;
P = put option)

P Purchasing 200000 120 A 20080925 5.1
C Purchasing 1000 66 E 20091215 88.9
C Selling -1000 66 E 20091215 88.87
P Selling -200000 138 A 20080925 11.55

(ii) Exercising

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

(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.

NONE

Is a Supplemental Form 38.5(b) attached? (Note 8) YES

Date of disclosure 10 April 2008

Contact name Ciaran Lavery

Telephone number 02890 409538

Name of offeree/offeror with which connected BHP Billiton plc

Nature of connection (Note 9) Corporate Broker/Financial 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 price Type, e.g. Expiry date
purchased securities to which (Note 2) American,
e.g. call option the option or European
derivative relates etc.

P Written 200000 120 A 20080925
P Written 156000 110 E 20080529
P Written 140000 130 A 20081218
P Written 130000 60 A 20080925
P Written 100000 132 A 20080925
C Purchased 52000 128 A 20080529
P Written 50979 56.1501 A 20101011
P Written 40000 74.25 E 20110727
P Written 39000 58 A 20080925
P Written 30588 56.0324 E 20081103
C Purchased 25000 120 A 20080423
P Written 12000 150 E 20080529
P Written 7517 116.82 A 20120711
P Written 6789 94.91 A 20110623
P Written 6646 37.6132 E 20091001
P Written 6415 77.94 E 20100219
P Written 6268 88.6 A 20120327
P Written 5906 119.75 A 20120628
P Written 5780 109.19 A 20120530
P Written 5428 92.64 A 20110624
P Written 4886 97.272 A 20120828
P Written 4420 88.07 A 20110623
P Written 4320 99.12 A 20120425
P Written 3828 115.61 A 20120613
P Written 3801 96.12 A 20110623
P Written 3468 164.66 A 20121227
P Written 3105 99.8 A 20110428
P Written 2994 85.04 A 20110328
P Written 2862 119 A 20120711
P Written 2591 38.5842 E 20091201
P Written 2269 44.0766 E 20080630
P Written 2248 73.8533 A 20101229
P Written 2024 98.79 E 20100629
C Purchased 2000 78.46 A 20090924
P Written 1976 160.932 A 20121128
P Written 1792 153.6 A 20130107
P Written 1370 85.0735 A 20110228
P Written 1273 78.5 E 20110630
P Written 1188 105.3 A 20110523
P Written 1152 43.3704 E 20100628
P Written 1152 43.3704 E 20100628
P Written 1132 83.22 A 20111007
C Purchased 1000 106 A 20080626
P Written 869 89.4361 A 20110207
P Written 765 43.9589 E 20080630
P Written 725 138 A 20130228
P Written 700 103.7 A 20120515
P Written 561 89 E 20100809
P Written 514 77.8 E 20090630
P Written 464 95.75 E 20100629
P Written 454 44.0766 E 20080630
P Written 405 98.1 A 20100625
P Written 400 131.96 A 20130205
P Written 392 131.14 A 20121011
P Written 388 77.2 E 20110627
P Written 365 137 A 20130328
P Written 337 29.61 E 20080625
P Written 332 75.22 E 20100524
P Written 302 82.55 E 20100517
P Written 290 95.75 E 20100628
P Written 268 135.22 A 20110412
P Written 266 94.08 A 20110728
P Written 254 78.6 E 20110707
P Written 236 84.55 E 20110509
P Written 208 95.7 E 20120905
P Written 208 95.7 E 20120905
P Written 203 98.22 E 20120912
P Written 203 98.22 E 20120912
P Written 191 78.5 E 20110630
P Written 191 78.5 E 20110630
P Written 160 131.2 A 20130328
P Written 159 94.02 A 20110728
P Written 141 93.6 A 20110728
P Written 138 92.66 A 20110728
P Written 117 128.71 A 20110224
P Written 115 130.34 A 20121220
P Written 81 124.35 A 20130228
P Written 79 127.31 A 20130228
P Written 78 128.75 A 20130228
P Written 77 129.41 A 20121220
C Written -70 105 A 20081127
C Written -200 65 A 20081127
P Purchased -203 98.22 E 20120912
P Purchased -208 95.7 E 20120905
C Written -400 110 A 20081218
P Purchased -1000 94 A 20080626
P Purchased -2000 77 A 20111222
P Purchased -2000 120 A 20080423
C Written -2020 42.5 A 20080623
P Purchased -5000 68 A 20101223
C Written -5682 64 A 20090619
C Written -6595 59 A 20080423
C Written -8383 53.463 A 20120628
P Purchased -10000 100 A 20080626
P Purchased -10000 128 A 20080626
C Written -12000 145 E 20080529
P Purchased -16000 124 A 20080626
P Purchased -17000 126 A 20080626
P Purchased -18000 74 A 20080626
C Written -33000 85 A 20111222
P Purchased -44000 72 A 20081218
C Written -50000 122 A 20081218
C Written -50000 150 A 20080626
P Purchased -62000 80 A 20111222
C Written -75000 56.89 A 20090924
P Purchased -76000 75 A 20111222
P Purchased -100000 136 A 20080626
P Purchased -112000 68.66 A 20090924
P Purchased -140000 110 A 20081218
C Written -145000 90 A 20080626
P Purchased -200000 138 A 20080925
P Purchased -242000 78.46 A 20090924

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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