Citigroup Derivs Mkt - EPT Disclosure

* Reuters is not responsible for the content in this press release.

Tue Jan 15, 2008 9:48am EST

RNS Number:8271L
Citigroup Derivatives Markets Inc
15 January 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        Ordinary Shares (dealt in the form of ADRs)
dealings being disclosed relate (Note 1)

Date of dealing                                14 January 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                       18,530            (0.00%)         31,276            (0.00%)

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

(3) Options and agreements to purchase/sell   270,100           (0.02%)         265,300           (0.02%)

Total                                         288,630           (0.02%)         296,576           (0.02%)




(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)
                                                                             USD (unless stated)
                                                       200                                   432.15
                                                       100                                   404.56
                                                       100                                   402.21
                                                       100                                   402.2
Total                                                  500


Sales                                 Number of securities                   Price per unit (Note 4)
                                                                             USD (unless stated)
                                                       -10                                   407.11
                                                       -90                                   407.3
                                                       -100                                   405
                                                       -100                                  404.24
                                                       -100                                  407.45
                                                       -100                                  407.11
                                                       -100                                  405.19
                                                       -100                                  404.16
                                                       -300                                  407.67
Total                                                 1,000



 (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,
e.g. call option purchasing,      which the option Price (USD)     European etc.    date            paid/received
                 varying etc.     relates (Note 6)                                                  per unit (USD)
(C = call;                                                                                          (Note 4)

  P = put)
       C            Purchasing          2400             440           AMERICAN       2008-01-19          0.9
       C            Purchasing          1000             440           AMERICAN       2008-01-19          1.45
       C            Purchasing          1000             460           AMERICAN       2008-02-16           10
       C            Purchasing          1000             530           AMERICAN       2008-02-16          1.6
       C            Purchasing          500              400           AMERICAN       2008-01-19          14.5
       P            Purchasing          400              390           AMERICAN       2008-01-19          4.9
       C            Purchasing          300              410           AMERICAN       2008-01-19           9
       P            Purchasing          200              400           AMERICAN       2008-01-19          6.3
       P            Purchasing          200              410           AMERICAN       2008-01-19         14.45
       C            Purchasing          200              390           AMERICAN       2008-02-16           37
       C            Purchasing          200              430           AMERICAN       2008-02-16          19.6
       C            Purchasing          200              430           AMERICAN       2008-02-16          19.6
       P            Purchasing          200              380           AMERICAN       2008-01-19          2.6
       C            Purchasing          200              430           AMERICAN       2008-01-19          1.95
       C            Purchasing          200              400           AMERICAN       2008-01-19         13.35
       C            Purchasing          200              430           AMERICAN       2008-04-19          30.8
       C            Purchasing          200              410           AMERICAN       2008-01-19          7.9
       P            Purchasing          200              400           AMERICAN       2008-01-19          6.2
       P            Purchasing          200              480           AMERICAN       2008-01-19         47.85
       P            Purchasing          100              390           AMERICAN       2008-01-19          5.47
       P            Purchasing          100              410           AMERICAN       2008-01-19          11.4
       P            Purchasing          100              390           AMERICAN       2008-04-19          34.6
       C            Purchasing          100              430           AMERICAN       2008-01-19          1.9
       C            Purchasing          100              400           AMERICAN       2008-01-19          14.3
       C            Purchasing          100              420           AMERICAN       2008-01-19           6
       C            Purchasing          100              420           AMERICAN       2008-01-19          5.3
       C            Purchasing          100              450           AMERICAN       2008-04-19         25.31
       C            Purchasing          100              450           AMERICAN       2008-04-19          24.1
       C            Purchasing          100              430           AMERICAN       2008-02-16           17
       C            Purchasing          100              420           AMERICAN       2008-01-19          4.4
       C            Purchasing          100              410           AMERICAN       2008-02-16          27.2
       C            Purchasing          100              410           AMERICAN       2008-02-16          27.2
       C            Purchasing          100              390           AMERICAN       2008-02-16          36.5
       C            Purchasing          100              430           AMERICAN       2008-01-19          1.95
       P            Purchasing          100              370           AMERICAN       2008-01-19          0.75
       P            Purchasing          100              370           AMERICAN       2008-02-16          13.4
       P            Purchasing          100              400           AMERICAN       2008-01-19          9.6
       P            Purchasing          100              400           AMERICAN       2008-01-19          9.6
       P            Purchasing          100              300           AMERICAN       2008-07-19          14.1
       P             Selling            -100             400           AMERICAN       2008-01-19          7.7
       P             Selling            -100             360           AMERICAN       2008-01-19          0.82
       P             Selling            -100             250           AMERICAN       2008-01-19          0.25
       C             Selling            -100             410           AMERICAN       2008-07-19           58
       P             Selling            -100             400           AMERICAN       2008-02-16         25.28
       C             Selling            -100             440           AMERICAN       2008-04-19           28
       C             Selling            -100             440           AMERICAN       2008-04-19           28
       C             Selling            -100             440           AMERICAN       2008-04-19           28
       C             Selling            -100             400           AMERICAN       2008-01-19           14
       C             Selling            -100             440           AMERICAN       2008-04-19           28
       C             Selling            -100             480           AMERICAN       2008-01-19          0.4
       C             Selling            -100             470           AMERICAN       2008-01-19          0.1
       P             Selling            -100             390           AMERICAN       2008-01-19           5
       P             Selling            -100             400           AMERICAN       2008-02-16           26
       C             Selling            -200             440           AMERICAN       2008-04-19           28
       C             Selling            -300             390           AMERICAN       2008-02-16          37.9



(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                                                15 January 2008

Contact name                                                      Selina Campbell

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 securities   Exercise price    Type, e.g.     Expiry date
                   purchased       to which the option or (Note 2)          American,
e.g. call option                   derivative relates                       European etc.


        P              Written             41900                 270           American          2008-01-19
        P              Written             11800                 370           American          2008-01-19
        C             Purchased            11000                 400           American          2008-01-19
        C             Purchased             8300                 570           American          2008-01-19
        C             Purchased             8200                 330           American          2008-01-19
        C             Purchased             8000                 260           American          2008-04-19
        P              Written              6700                 430           American          2008-01-19
        C             Purchased             5700                 420           American          2008-01-19
        P              Written              5300                 380           American          2008-01-19
        C             Purchased             5200                 450           American          2008-01-19
        C             Purchased             5000                 460           American          2008-01-19
        C             Purchased             4600                 360           American          2008-01-19
        C             Purchased             4600                 590           American          2008-01-19
        C             Purchased             4200                 440           American          2008-02-16
        P              Written              4100                 410           American          2008-04-19
        C             Purchased             4000                 580           American          2008-01-19
        P              Written              3300                 230           American          2008-01-19
        P              Written              3300                 290           American          2008-01-19
        C             Purchased             3300                 520           American          2008-01-19
        P              Written              3200                 300           American          2008-04-19
        C             Purchased             3000                 440           American          2008-01-19
        C             Purchased             3000                 560           American          2008-01-19
        C             Purchased             3000                 600           American          2008-02-16
        C             Purchased             2900                 230           American          2008-04-19
        C             Purchased             2900                 250           American          2008-04-19
        P              Written              2800                 400           American          2008-01-19
        C             Purchased             2800                 440           American          2008-01-19
        P              Written              2700                 250           American          2008-01-19
        C             Purchased             2500                 500           American          2008-01-19
        P              Written              2500                 390           American          2008-02-16
        C             Purchased             2500                 450           American          2008-07-19
        C             Purchased             2400                 320           American          2008-04-19
        C             Purchased             2200                 600           American          2008-01-19
        C             Purchased             2200                 270           American          2008-04-19
        P              Written              2100                 590           American          2008-04-19
        P              Written              2000                 410           American          2008-01-19
        C             Purchased             2000                 430           American          2008-02-16
        C             Purchased             2000                 590           American          2008-02-16
        C             Purchased             2000                 240           American          2008-04-19
        C             Purchased             2000                 340           American          2008-04-19
        C             Purchased             2000                 370           American          2008-04-19
        P              Written              2000                 410           American          2008-04-19
        C             Purchased             2000                 440           American          2008-07-19
        C             Purchased             1900                 500           American          2008-02-16
        P              Written              1800                 280           American          2008-01-19
        C             Purchased             1800                 400           American          2008-01-19
        C             Purchased             1700                 380           American          2008-01-19
        P              Written              1600                 400           American          2008-01-19
        P              Written              1600                 440           American          2008-01-19
        C             Purchased             1600                 510           American          2008-01-19
        C             Purchased             1600                 390           American          2008-04-19
        C             Purchased             1500                 310           American          2008-04-19
        P              Written              1500                 350           American          2008-04-19
        C             Purchased             1500                 440           American          2008-04-19
        P              Written              1200                 360           American          2008-01-19
        P              Written              1100                 390           American          2008-01-19
        P              Written              1100                 420           American          2008-04-19
        P              Written              1100                 460           American          2008-07-19
        P              Written              1100                 490           American          2008-07-19
        C             Purchased             1000                 240           American          2008-01-19
        C             Purchased             1000                 360           American          2008-01-19
        C             Purchased             1000                 390           American          2008-01-19
        C             Purchased             1000                 460           American          2008-02-16
        C             Purchased             1000                 530           American          2008-02-16
        C             Purchased             1000                 560           American          2008-02-16
        C             Purchased             1000                 580           American          2008-02-16
        C             Purchased             1000                 300           American          2008-04-19
        C             Purchased             1000                 360           American          2008-04-19
        P              Written              1000                 370           American          2008-04-19
        C             Purchased             1000                 390           American          2008-04-19
        P              Written              1000                 400           American          2008-04-19
        C             Purchased             1000                 420           American          2008-04-19
        P              Written              1000                 430           American          2008-04-19
        P              Written              1000                 560           American          2008-04-19
        C             Purchased             1000                 300           American          2008-07-19
        P              Written              900                  200           American          2008-01-19
        P              Written              900                  400           American          2008-02-16
        C             Purchased             900                  430           American          2008-04-19
        P              Written              900                  330           American          2008-07-19
        C             Purchased             900                  360           American          2008-07-19
        C             Purchased             800                  290           American          2008-01-19
        P              Written              800                  380           American          2008-01-19
        C             Purchased             800                  570           American          2008-02-16
        C             Purchased             800                  330           American          2008-04-19
        C             Purchased             800                  400           American          2008-04-19
        C             Purchased             800                  500           American          2008-04-19
        C             Purchased             700                  220           American          2008-01-19
        C             Purchased             700                  420           American          2008-01-19
        C             Purchased             700                  470           American          2008-01-19
        P              Written              600                  300           American          2008-01-19
        C             Purchased             600                  430           American          2008-01-19
        P              Written              600                  450           American          2008-01-19
        C             Purchased             600                  440           American          2008-02-16
        P              Written              600                  360           American          2008-04-19
        C             Purchased             500                  300           American          2008-01-19
        C             Purchased             500                  540           American          2008-01-19
        C             Purchased             500                  550           American          2008-01-19
        P              Written              500                  360           American          2008-04-19
        P              Written              500                  450           American          2008-07-19
        C             Purchased             500                  470           American          2008-07-19
        C             Purchased             500                  550           American          2008-07-19
        C             Purchased             400                  340           American          2008-01-19
        P              Written              300                  410           American          2008-01-19
        C             Purchased             300                  470           American          2008-01-19
        P              Written              300                  430           American          2008-02-16
        C             Purchased             300                  430           American          2008-04-19
        P              Written              300                  570           American          2008-04-19
        P              Written              300                  300           American          2008-07-19
        C             Purchased             300                  480           American          2008-07-19
        C             Purchased             200                  430           American          2008-01-19
        C             Purchased             200                  480           American          2008-01-19
        C             Purchased             200                  480           American          2008-02-16
        C             Purchased             200                  500           American          2008-07-19
        C             Purchased             100                  370           American          2008-01-19
        C             Purchased             100                  380           American          2008-01-19
        P              Written              100                  470           American          2008-01-19
        C             Purchased             100                  360           American          2008-02-16
        C             Purchased             100                  360           American          2008-02-16
        P              Written              100                  370           American          2008-02-16
        C             Purchased             100                  390           American          2008-02-16
        C             Purchased             100                  410           American          2008-02-16
        P              Written              100                  410           American          2008-02-16
        P              Written              100                  450           American          2008-02-16
        C             Purchased             100                  290           American          2008-04-19
        P              Written              100                  300           American          2008-04-19
        P              Written              100                  390           American          2008-04-19
        P              Written              100                  580           American          2008-04-19
        C             Purchased             100                  390           American          2008-07-19
        P              Written              100                  390           American          2008-07-19
        C             Purchased             100                  410           American          2008-07-19
        P              Written              100                  420           American          2008-07-19
        P              Written              100                  520           American          2008-07-19
        P              Written              100                  530           American          2008-07-19
        P             Purchased             -100                 250           American          2008-01-19
        C              Written              -100                 280           American          2008-01-19
        P             Purchased             -100                 420           American          2008-01-19
        P             Purchased             -100                 600           American          2008-01-19
        P             Purchased             -100                 400           American          2008-02-16
        C              Written              -100                 420           American          2008-02-16
        P             Purchased             -100                 450           American          2008-02-16
        C              Written              -100                 520           American          2008-04-19
        C              Written              -100                 590           American          2008-04-19
        C              Written              -100                 320           American          2008-07-19
        P             Purchased             -100                 320           American          2008-07-19
        C              Written              -100                 460           American          2008-07-19
        P             Purchased             -200                 210           American          2008-01-19
        P             Purchased             -200                 240           American          2008-01-19
        C              Written              -200                 260           American          2008-01-19
        P             Purchased             -200                 530           American          2008-01-19
        C              Written              -200                 430           American          2008-07-19
        P             Purchased             -300                 260           American          2008-01-19
        P             Purchased             -300                 410           American          2008-02-16
        C              Written              -300                 450           American          2008-04-19
        C              Written              -300                 420           American          2008-07-19
        C              Written              -400                 490           American          2008-01-19
        C              Written              -400                 390           American          2008-02-16
        C              Written              -400                 410           American          2008-02-16
        P             Purchased             -400                 240           American          2008-04-19
        P             Purchased             -500                 350           American          2008-01-19
        C              Written              -500                 410           American          2008-01-19
        C              Written              -500                 380           American          2008-04-19
        C              Written              -500                 510           American          2008-04-19
        P             Purchased             -500                 310           American          2008-07-19
        P             Purchased             -600                 460           American          2008-01-19
        P             Purchased             -600                 360           American          2008-02-16
        P             Purchased             -600                 600           American          2008-04-19
        P             Purchased             -600                 420           American          2008-07-19
        C              Written              -700                 230           American          2008-01-19
        P             Purchased             -700                 390           American          2008-01-19
        P             Purchased             -700                 410           American          2008-07-19
        P             Purchased             -800                 350           American          2008-01-19
        C              Written              -800                 460           American          2008-01-19
        C              Written              -800                 350           American          2008-04-19
        P             Purchased             -800                 380           American          2008-04-19
        C              Written              -800                 400           American          2008-04-19
        C              Written              -800                 500           American          2008-04-19
        C              Written              -900                 200           American          2008-01-19
        C              Written              -900                 410           American          2008-01-19
        C              Written              -900                 410           American          2008-04-19
        P             Purchased             -900                 470           American          2008-07-19
        P             Purchased             -900                 500           American          2008-07-19
        C              Written              -900                 520           American          2008-07-19
        C              Written             -1000                 350           American          2008-01-19
        P             Purchased            -1000                 370           American          2008-01-19
        C              Written             -1000                 370           American          2008-02-16
        C              Written             -1000                 380           American          2008-02-16
        P             Purchased            -1000                 390           American          2008-02-16
        C              Written             -1000                 480           American          2008-02-16
        P             Purchased            -1000                 230           American          2008-04-19
        P             Purchased            -1000                 450           American          2008-04-19
        P             Purchased            -1000                 480           American          2008-04-19
        P             Purchased            -1000                 510           American          2008-04-19
        P             Purchased            -1000                 540           American          2008-04-19
        P             Purchased            -1000                 350           American          2008-07-19
        P             Purchased            -1000                 350           American          2008-07-19
        P             Purchased            -1000                 380           American          2008-07-19
        P             Purchased            -1000                 400           American          2008-07-19
        C              Written             -1000                 430           American          2008-07-19
        C              Written             -1000                 530           American          2008-07-19
        P             Purchased            -1000                 540           American          2008-07-19
        P             Purchased            -1000                 550           American          2008-07-19
        C              Written             -1000                 580           American          2008-07-19
        C              Written             -1000                 590           American          2008-07-19
        C              Written             -1000                 600           American          2008-07-19
        P             Purchased            -1000                 600           American          2008-07-19
        P             Purchased            -1100                 470           American          2008-01-19
        C              Written             -1100                 420           American          2008-02-16
        P             Purchased            -1100                 250           American          2008-04-19
        P             Purchased            -1100                 320           American          2008-04-19
        C              Written             -1200                 440           American          2008-02-16
        C              Written             -1300                 190           American          2008-01-19
        C              Written             -1300                 380           American          2008-04-19
        P             Purchased            -1300                 430           American          2008-04-19
        C              Written             -1300                 480           American          2008-04-19
        P             Purchased            -1400                 360           American          2008-07-19
        C              Written             -1500                 480           American          2008-01-19
        P             Purchased            -1500                 480           American          2008-01-19
        P             Purchased            -1500                 440           American          2008-04-19
        C              Written             -1500                 460           American          2008-04-19
        P             Purchased            -1500                 460           American          2008-04-19
        P             Purchased            -1500                 550           American          2008-04-19
        C              Written             -1600                 280           American          2008-01-19
        C              Written             -1600                 400           American          2008-07-19
        C              Written             -1700                 590           American          2008-07-19
        C              Written             -1800                 320           American          2008-01-19
        C              Written             -1800                 390           American          2008-01-19
        C              Written             -1800                 400           American          2008-02-16
        C              Written             -1800                 430           American          2008-02-16
        P             Purchased            -1900                 370           American          2008-02-16
        C              Written             -1900                 570           American          2008-04-19
        C              Written             -1900                 600           American          2008-07-19
        C              Written             -2000                 470           American          2008-02-16
        P             Purchased            -2000                 240           American          2008-04-19
        P             Purchased            -2000                 520           American          2008-04-19
        C              Written             -2000                 580           American          2008-04-19
        P             Purchased            -2000                 590           American          2008-07-19
        P             Purchased            -2100                 370           American          2008-04-19
        C              Written             -2100                 470           American          2008-04-19
        P             Purchased            -2300                 360           American          2008-01-19
        C              Written             -2400                 450           American          2008-04-19
        P             Purchased            -2500                 420           American          2008-01-19
        P             Purchased            -2500                 290           American          2008-04-19
        P             Purchased            -2500                 350           American          2008-04-19
        C              Written             -2600                 370           American          2008-01-19
        P             Purchased            -2700                 340           American          2008-01-19
        P             Purchased            -2700                 300           American          2008-07-19
        P             Purchased            -2900                 470           American          2008-04-19
        C              Written             -3000                 410           American          2008-07-19
        C              Written             -3100                 560           American          2008-04-19
        C              Written             -3100                 560           American          2008-07-19
        C              Written             -3400                 310           American          2008-01-19
        P             Purchased            -3400                 270           American          2008-04-19
        P             Purchased            -3400                 340           American          2008-04-19
        P             Purchased            -3600                 390           American          2008-04-19
        C              Written             -3800                 530           American          2008-01-19
        C              Written             -3800                 490           American          2008-04-19
        P             Purchased            -3900                 310           American          2008-04-19
        P             Purchased            -4300                 220           American          2008-01-19
        P             Purchased            -4600                 280           American          2008-04-19
        C              Written             -4900                 250           American          2008-01-19
        P             Purchased            -5100                 250           American          2008-04-19
        P             Purchased            -5100                 260           American          2008-04-19
        P             Purchased            -5400                 330           American          2008-01-19
        C              Written             -5600                 540           American          2008-04-19
        P             Purchased            -6000                 230           American          2008-04-19
        P             Purchased            -6700                 310           American          2008-01-19
        P             Purchased            -6700                 400           American          2008-04-19
        C              Written             -7200                 440           American          2008-04-19
        P             Purchased            -11600                320           American          2008-01-19
        C              Written             -36100                400           American          2008-02-16






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

EMMILFSSLSIELIT
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