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EPT Disclosure

13th May 2008 10:58

RNS Number : 3079U

Citigroup Derivatives Markets Inc

13 May 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 Derivatives Markets Inc
Company dealt in	Rio Tinto plc
Class of relevant security to which the dealings being disclosed relate (Note 1)	Ordinary Shares (dealt in the form of ADRs)
Date of dealing	09 May 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	1,550 (0.00%)	4,000 (0.00%)
(2) Derivatives (other than options)	(0.00%)	(0.00%)
(3) Options and agreements to purchase/sell	55,900 (0.01%)	50,300 (0.01%)
Total	57,450 (0.01%)	54,300 (0.01%)

(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%)

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) USD (unless stated)
	500	303
	500	302.34
	500	294.94
	400	292.48
	300	296.82
	300	281.44
	290	278.88
	200	300.24
	200	295.35
	200	294.77
	100	281.39
	100	281.38
	100	296.75
	100	295.15
	100	296.81
	100	292.52
	100	280.58
	90	294.85
	10	294.96
	10	278.76
Total	4,200

Sales	Number of securities	Price per unit (Note 4) USD (unless stated)
	-50	299.9
	-100	294.68
	-100	299.38
	-100	294.11
	-100	293.71
	-100	281.99
	-100	302.22
	-200	298.41
	-200	299.53
	-200	280.45
	-200	279.95
	-200	300.36
	-200	292.73
	-300	300.34
	-300	281.71
	-300	280.75
	-350	299.74
	-400	302.54
	-500	290.12
	-500	279.34
	-500	278.87
	-800	293.1
	-900	295.53
	-1000	292.18
	-2000	288.9
Total	9,700

(b) Derivatives transactions (other than options)

Product name,

e.g. CFD

Long/short (Note 5)

Number of securities (Note 6)

Price per unit (Note 4)

(i) Writing, selling, purchasing or varying

Product name, e.g. call option (C = call; P = put)	Writing, selling, purchasing, varying etc.	Number of securities to which the option relates (Note 6)	Exercise Price (USD)	Type, e.g. American, European etc.	Expiry date	Option money paid/received per unit (USD) (Note 4)
P	purchasing	5000	230	AMERICAN	2007-10-20	4.5
C	purchasing	5000	300	AMERICAN	2007-05-19	0.5
C	purchasing	5000	300	AMERICAN	2007-05-19	0.5
P	purchasing	3500	280	AMERICAN	2007-06-16	9.6
C	purchasing	3000	290	AMERICAN	2007-05-19	13
C	purchasing	2000	270	AMERICAN	2007-05-19	15
C	purchasing	2000	300	AMERICAN	2007-05-19	1.1
C	purchasing	2000	290	AMERICAN	2007-05-19	10.6
C	purchasing	1500	270	AMERICAN	2007-05-19	28.4
C	purchasing	1100	270	AMERICAN	2007-05-19	15
P	purchasing	1000	280	AMERICAN	2007-05-19	5.8
P	purchasing	1000	280	AMERICAN	2007-05-19	5.8
P	purchasing	1000	280	AMERICAN	2007-05-19	5.9
P	purchasing	1000	280	AMERICAN	2007-05-19	5.9
C	purchasing	1000	270	AMERICAN	2007-05-19	15
C	purchasing	1000	310	AMERICAN	2007-05-19	6.1
C	purchasing	1000	310	AMERICAN	2007-05-19	6.2
C	purchasing	1000	280	AMERICAN	2007-06-16	11.1
C	purchasing	1000	300	AMERICAN	2007-06-16	16.5
C	purchasing	1000	300	AMERICAN	2007-06-16	15.2
C	purchasing	1000	300	AMERICAN	2007-05-19	9
C	purchasing	1000	300	AMERICAN	2007-05-19	8.1
C	purchasing	1000	290	AMERICAN	2007-05-19	9.9
C	purchasing	1000	290	AMERICAN	2007-05-19	9.1
P	purchasing	1000	270	AMERICAN	2007-05-19	0.05
P	purchasing	1000	270	AMERICAN	2007-05-19	0.1
P	purchasing	1000	270	AMERICAN	2007-05-19	0.05
C	purchasing	1000	290	AMERICAN	2007-05-19	10.6
C	purchasing	1000	290	AMERICAN	2007-05-19	12
C	purchasing	1000	270	AMERICAN	2007-05-19	28.4
C	purchasing	1000	300	AMERICAN	2007-07-21	18.7
C	purchasing	1000	310	AMERICAN	2007-10-20	19.6
P	purchasing	1000	270	AMERICAN	2007-05-19	0.2
P	purchasing	1000	270	AMERICAN	2007-05-19	0.25
P	purchasing	1000	290	AMERICAN	2007-05-19	6
P	purchasing	1000	300	AMERICAN	2007-05-19	11
P	purchasing	1000	290	AMERICAN	2007-06-16	12
P	purchasing	1000	290	AMERICAN	2007-05-19	4.9
P	purchasing	1000	290	AMERICAN	2007-05-19	6.5
P	purchasing	1000	280	AMERICAN	2007-05-19	0.65
P	purchasing	1000	270	AMERICAN	2007-05-19	2
P	purchasing	1000	230	AMERICAN	2007-10-20	3.3
P	purchasing	1000	230	AMERICAN	2007-10-20	4.3
P	purchasing	1000	230	AMERICAN	2007-10-20	4.4
P	purchasing	1000	230	AMERICAN	2007-10-20	4.7
P	purchasing	1000	230	AMERICAN	2007-10-20	4.3
P	purchasing	1000	300	AMERICAN	2007-10-20	22.9
P	purchasing	1000	230	AMERICAN	2007-10-20	4.5
P	purchasing	800	300	AMERICAN	2007-05-19	11.1
P	purchasing	600	200	AMERICAN	2007-10-20	1.55
C	purchasing	500	270	AMERICAN	2007-07-21	21.5
C	purchasing	500	250	AMERICAN	2007-07-21	37.1
C	purchasing	500	300	AMERICAN	2007-05-19	2.45
C	purchasing	500	300	AMERICAN	2007-05-19	4.4
C	purchasing	500	290	AMERICAN	2007-05-19	8.9
P	purchasing	500	270	AMERICAN	2007-05-19	0.1
P	purchasing	500	270	AMERICAN	2007-05-19	0.2
P	purchasing	500	260	AMERICAN	2007-05-19	0.05
P	purchasing	500	300	AMERICAN	2007-05-19	9.9
P	purchasing	500	290	AMERICAN	2007-05-19	4.7
C	purchasing	400	280	AMERICAN	2007-06-16	11
C	purchasing	300	290	AMERICAN	2007-05-19	13.1
P	purchasing	200	300	AMERICAN	2007-07-21	21.8
P	purchasing	200	300	AMERICAN	2007-05-19	12.6
C	purchasing	200	300	AMERICAN	2007-05-19	7.9
C	purchasing	200	260	AMERICAN	2007-10-20	45
P	purchasing	200	260	AMERICAN	2007-06-16	3.5
P	purchasing	200	290	AMERICAN	2007-05-19	6.9
P	purchasing	200	270	AMERICAN	2007-05-19	3.2
P	purchasing	100	300	AMERICAN	2007-05-19	12.6
P	purchasing	100	300	AMERICAN	2007-05-19	12.6
C	purchasing	100	250	AMERICAN	2007-07-21	37.2
C	purchasing	100	300	AMERICAN	2007-05-19	9
C	purchasing	100	280	AMERICAN	2007-05-19	19.5
C	purchasing	100	270	AMERICAN	2007-05-19	12.2
C	selling	-100	300	AMERICAN	2007-05-19	1.6
C	selling	-100	310	AMERICAN	2007-05-19	5.9
C	selling	-100	280	AMERICAN	2007-07-21	16.5
C	selling	-100	195	AMERICAN	2007-07-21	109.3
C	selling	-100	200	AMERICAN	2007-07-21	104.4
C	selling	-100	200	AMERICAN	2007-10-20	106.2
C	selling	-100	220	AMERICAN	2007-10-20	88.1
P	selling	-100	250	AMERICAN	2007-05-19	0.55
P	selling	-100	260	AMERICAN	2007-05-19	1.3
P	selling	-100	290	AMERICAN	2007-06-16	10.7
P	selling	-100	290	AMERICAN	2007-06-16	10.2
P	selling	-100	260	AMERICAN	2007-06-16	4.4
P	selling	-100	260	AMERICAN	2007-06-16	4.4
P	selling	-100	260	AMERICAN	2007-06-16	4.4
P	selling	-100	280	AMERICAN	2007-05-19	1.5
P	selling	-100	270	AMERICAN	2007-05-19	2.3
P	selling	-100	230	AMERICAN	2007-10-20	5.6
P	selling	-100	230	AMERICAN	2007-10-20	5.6
P	selling	-100	230	AMERICAN	2007-10-20	5.6
P	selling	-100	250	AMERICAN	2007-10-20	9.2
P	selling	-100	250	AMERICAN	2007-10-20	9.3
P	selling	-100	300	AMERICAN	2007-05-19	12.6
P	selling	-100	300	AMERICAN	2007-05-19	12.6
C	selling	-200	270	AMERICAN	2007-05-19	28.4
C	selling	-200	270	AMERICAN	2007-05-19	28.4
C	selling	-200	270	AMERICAN	2007-05-19	28.4
C	selling	-200	270	AMERICAN	2007-05-19	28.4
C	selling	-200	270	AMERICAN	2007-05-19	13.6
C	selling	-200	290	AMERICAN	2007-07-21	18.2
P	selling	-200	290	AMERICAN	2007-05-19	5.4
P	selling	-200	300	AMERICAN	2007-05-19	12.6
C	selling	-300	270	AMERICAN	2007-05-19	28.4
C	selling	-300	270	AMERICAN	2007-05-19	28.4
C	selling	-300	270	AMERICAN	2007-05-19	28.4
C	selling	-300	290	AMERICAN	2007-05-19	10.3
C	selling	-300	220	AMERICAN	2007-10-20	82.5
P	selling	-300	270	AMERICAN	2007-05-19	1.85
C	selling	-400	310	AMERICAN	2007-05-19	5.2
P	selling	-400	210	AMERICAN	2007-10-20	2.9
P	selling	-400	260	AMERICAN	2007-06-16	5.1
P	selling	-400	260	AMERICAN	2007-06-16	4.4
P	selling	-400	260	AMERICAN	2007-06-16	4.4
P	selling	-400	250	AMERICAN	2007-10-20	9.2
C	selling	-500	290	AMERICAN	2007-05-19	10.6
C	selling	-500	300	AMERICAN	2007-05-19	11
C	selling	-500	310	AMERICAN	2007-05-19	4.2
C	selling	-500	290	AMERICAN	2007-06-16	8.6
C	selling	-500	290	AMERICAN	2007-06-16	8.8
C	selling	-500	300	AMERICAN	2007-06-16	8.9
P	selling	-500	240	AMERICAN	2007-05-19	0.45
P	selling	-500	270	AMERICAN	2007-06-16	7.8
C	selling	-500	270	AMERICAN	2007-07-21	21.5
P	selling	-500	260	AMERICAN	2007-05-19	0.05
C	selling	-700	290	AMERICAN	2007-05-19	8.2
C	selling	-800	270	AMERICAN	2007-05-19	28.4
P	selling	-800	280	AMERICAN	2007-05-19	6
P	selling	-800	300	AMERICAN	2007-05-19	11.1
C	selling	-1000	310	AMERICAN	2007-05-19	1.9
C	selling	-1000	310	AMERICAN	2007-05-19	5.7
C	selling	-1000	310	AMERICAN	2007-05-19	4.2
C	selling	-1000	310	AMERICAN	2007-05-19	2.65
C	selling	-1000	310	AMERICAN	2007-05-19	5.6
C	selling	-1000	310	AMERICAN	2007-05-19	5.3
C	selling	-1000	300	AMERICAN	2007-06-16	14.5
C	selling	-1000	300	AMERICAN	2007-06-16	12.2
C	selling	-1000	290	AMERICAN	2007-05-19	13.9
C	selling	-1000	310	AMERICAN	2007-07-21	6
P	selling	-1000	290	AMERICAN	2007-05-19	6.7
P	selling	-1000	290	AMERICAN	2007-05-19	7.3
P	selling	-1000	290	AMERICAN	2007-05-19	7
P	selling	-1000	290	AMERICAN	2007-05-19	4.9
P	selling	-1000	300	AMERICAN	2007-05-19	7.4
P	selling	-1000	270	AMERICAN	2007-06-16	5.8
P	selling	-1000	300	AMERICAN	2007-05-19	8.5
P	selling	-1000	260	AMERICAN	2007-06-16	4.5
P	selling	-1000	280	AMERICAN	2007-05-19	1.55
P	selling	-1000	280	AMERICAN	2007-05-19	1.5
P	selling	-1000	280	AMERICAN	2007-05-19	1.65
P	selling	-1000	280	AMERICAN	2007-05-19	1.65
P	selling	-1000	280	AMERICAN	2007-05-19	4
P	selling	-1000	280	AMERICAN	2007-05-19	1.8
P	selling	-1000	280	AMERICAN	2007-05-19	1.65
P	selling	-1000	270	AMERICAN	2007-05-19	2.15
P	selling	-1000	270	AMERICAN	2007-05-19	1.45
P	selling	-1000	220	AMERICAN	2007-10-20	3.5
P	selling	-1000	260	AMERICAN	2007-10-20	10.5
P	selling	-1000	250	AMERICAN	2007-10-20	8.3
P	selling	-1000	280	AMERICAN	2007-05-19	6
P	selling	-1000	280	AMERICAN	2007-05-19	5.6
P	selling	-1000	300	AMERICAN	2007-05-19	11.4
P	selling	-1000	300	AMERICAN	2007-05-19	7.5
C	selling	-1500	290	AMERICAN	2007-05-19	10.6
C	selling	-2000	300	AMERICAN	2007-05-19	1.1
P	selling	-2000	280	AMERICAN	2007-05-19	5.9
P	selling	-2000	280	AMERICAN	2007-05-19	5.8
C	selling	-4100	270	AMERICAN	2007-05-19	15
C	selling	-10000	300	AMERICAN	2007-05-19	0.5

(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	13 May 2008
Contact name	Pavla Trskova
Telephone number	02890 409544
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, e.g. call option	Written or purchased	Number of securities to which the option or derivative relates	Exercise price (Note 2)	Type, e.g. American, European etc.	Expiry date
C	purchased	7600	260	American	2007-05-19
C	purchased	5800	290	American	2007-05-19
P	purchased	5000	230	American	2007-10-20
P	purchased	4600	270	American	2007-05-19
P	purchased	4600	230	American	2007-10-20
P	purchased	3500	280	American	2007-06-16
C	purchased	2700	300	American	2007-05-19
P	purchased	2500	220	American	2007-07-21
C	purchased	1900	220	American	2007-07-21
P	purchased	1700	230	American	2007-05-19
C	purchased	1300	280	American	2007-06-16
P	purchased	1300	210	American	2007-07-21
C	purchased	1300	250	American	2007-07-21
P	purchased	1200	250	American	2007-05-19
P	purchased	1100	200	American	2007-10-20
C	purchased	1100	250	American	2007-10-20
C	purchased	1000	300	American	2007-07-21
P	purchased	1000	190	American	2007-10-20
P	purchased	1000	260	American	2007-10-20
C	purchased	1000	290	American	2007-10-20
P	purchased	1000	300	American	2007-10-20
C	purchased	1000	310	American	2007-10-20
P	purchased	800	290	American	2007-06-16
C	purchased	800	240	American	2007-07-21
P	purchased	400	270	American	2007-10-20
P	purchased	200	195	American	2007-07-21
P	purchased	200	300	American	2007-07-21
C	purchased	100	230	American	2007-05-19
C	purchased	100	280	American	2007-05-19
C	purchased	100	230	American	2007-07-21
P	written	-100	260	American	2007-05-19
C	written	-100	195	American	2007-07-21
C	written	-100	280	American	2007-07-21
C	written	-200	290	American	2007-07-21
C	written	-400	190	American	2007-07-21
C	written	-400	220	American	2007-10-20
P	written	-500	290	American	2007-05-19
P	written	-500	270	American	2007-06-16
C	written	-500	300	American	2007-06-16
C	written	-600	270	American	2007-05-19
C	written	-600	270	American	2007-06-16
C	written	-700	260	American	2007-10-20
C	written	-800	210	American	2007-07-21
P	written	-1000	240	American	2007-07-21
C	written	-1000	260	American	2007-07-21
C	written	-1000	270	American	2007-07-21
C	written	-1000	310	American	2007-07-21
C	written	-1000	270	American	2007-10-20
C	written	-1000	280	American	2007-10-20
P	written	-1100	200	American	2007-07-21
C	written	-1300	200	American	2007-10-20
P	written	-1400	250	American	2007-10-20
P	written	-2000	190	American	2007-07-21
P	written	-2100	260	American	2007-06-16
P	written	-2500	300	American	2007-05-19
P	written	-2600	210	American	2007-10-20
C	written	-2900	200	American	2007-07-21
C	written	-4200	250	American	2007-05-19
P	written	-4800	220	American	2007-10-20
C	written	-5000	310	American	2007-05-19
P	written	-8900	280	American	2007-05-19

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

EMMILFEIEVIVLIT

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