Rule 8.3 - RIO TINTO PLC

FORM 8.3 DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE (Rule 8.3 of the City Code on Takeovers and Mergers) 1. KEY INFORMATION Name of person dealing BARCLAYS PLC (Note 1) Company dealt in RIO TINTO Class of relevant security ORD GBP0.10 to which the dealings being disclosed relate (Note 2) Date of dealing 14 December 2007 2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE (a) Interests and short positions (following dealing) in the class of relevant security dealt in (Note 3) Long Short Number (%) Number (%) (1) Relevant 47,370,317 4.75% 2,656,399 0.27% securities (2) Derivatives 2,303,232 0.23% 224,223 0.02% (other than options) (3) Options and 204,131 0.02% 1,303,531 0.13% agreements to purchase/sell Total 49,877,680 5.00% 4,184,153 0.42% (b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3) Class of Long Short relevant security: Number (%) Number (%) (1) Relevant securities (2) Derivatives (other than options) (3) Options and agreements to purchase/sell Total (c) Rights to subscribe (Note 3) Class of relevant security: Details 3. DEALINGS (Note 4) (a) Purchases and sales Purchase/sale Number of Securities Price per unit (GBP) Purchase 2,898 51.7600 Purchase 6,056 51.7600 Purchase 1,837 51.8078 Purchase 5,604 52.7623 Purchase 136 53.5200 Purchase 87,491 51.7766 Purchase 8,260 51.7600 Purchase 87,965 51.5776 Purchase 1,837 51.8166 Purchase 56 Transfer Purchase 136,441 52.9400 Purchase 4,000 51.7203 Purchase 1,206 52.0263 Purchase 1,000 51.5300 Purchase 5,604 52.7623 Purchase 26,840 52.2370 Purchase 5,332 51.7600 Purchase 400 51.4979 Purchase 38,653 52.1760 Purchase 66 53.4900 Purchase 4,242 51.6920 Purchase 35,040 51.7600 Purchase 53,056 52.1447 Purchase 36,344 52.1524 Purchase 10,512 51.7600 Purchase 2,182 52.0141 Purchase 4,782 51.7600 Purchase 53,056 52.1447 Purchase 750 53.3400 Purchase 1,262 53.2717 Purchase 591 Transfer Purchase 6,716 52.4217 Purchase 16,238 53.2166 Purchase 78,163 51.7779 Purchase 126 53.3700 Purchase 3,467 51.7600 Purchase 10,615 52.1029 Sale 100 52.1900 Sale 32 Transfer Sale 6,716 52.4217 Sale 16,238 53.2166 Sale 200 52.1900 Sale 25,301 51.7600 Sale 8,260 51.7600 Sale 1,182 51.7600 Sale 400 51.4886 Sale 6,056 51.7600 Sale 87,965 51.5776 Sale 36,344 52.1524 Sale 4,000 51.7109 Sale 56 Transfer Sale 210 51.8475 Sale 591 Transfer Sale 2,182 52.0094 Sale 164,429 51.7600 Sale 70 51.6876 Sale 70 51.3076 Sale 36,344 52.1524 Sale 1,837 51.8166 Sale 4,242 51.6873 Sale 2,898 51.7600 Sale 126 53.3700 Sale 1,262 53.2637 Sale 26,840 52.2370 Sale 100 51.6875 Sale 7,883 51.7600 Sale 135 52.1900 Sale 140 51.7550 Sale 100 52.1900 Sale 78,163 51.7779 Sale 1,000 51.5300 Sale 1,206 52.0185 Sale 75 52.1900 Sale 100 52.1900 Sale 80 52.1900 Sale 100 52.1900 Sale 1,837 51.8078 Sale 3,467 51.7600 Sale 38,200 52.9400 Sale 185 52.1900 Sale 70 52.1900 Sale 200 52.1900 Sale 750 53.3400 Sale 5,604 52.7623 Sale 53,056 52.1447 Sale 5,040 51.7600 Sale 125 53.1450 Sale 16,238 53.2166 Sale 140 52.1900 Sale 50 52.1900 Sale 750 53.3400 Sale 250 52.1900 Sale 20 51.9000 Sale 6,716 52.4217 Sale 38,653 52.1760 Sale 10,615 52.0977 Sale 1,962 51.7600 Sale 65 52.1900 (b) Derivatives transactions (other than options) Product name, Long/Short Number of Price per (e.g. CFD) (Note 6) Securities unit (GBP) CFD Short 400 51.4978 CFD Short 2182 52.014 CFD Short 1206 52.0262 CFD Short 10615 52.1029 CFD Short 38653 52.176 CFD Short 5604 52.7623 CFD Short 136441 52.94 CFD Long 4242 51.6873 CFD Long 4000 51.7109 CFD Long 26840 52.2369 CFD Long 6716 52.4217 CFD Long 422 52.6664 CFD Long 1262 53.2636 CFD Long 750 53.34 (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 e.g. call selling, securities to price American, date paid/received option purchasing, which the option European etc. per unit (GBP) varying etc. relates (GBP) (ii) Exercising Product name, e.g. Number of Exercise price per call option securities unit (Note 5) (d) Other dealings (including new securities) (Note 4) Nature of transaction Details Price per unit (Note 8) (if applicable) (Note 5) 4. OTHER INFORMATION None 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 8 attached? (Note 9) YES Date of disclosure 17 December 2007 Contact name Geoff Smith Telephone number 020 7116 2913 If a connected EFM, name of offeree/offeror with which connected If a connected EFM, state nature of connection (Note 10) Notes The Notes on Form 8.3 can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk SUPPLEMENTAL FORM 8 DETAILS OF OPEN POSITIONS (This form should be attached to Form 8.1, Form 8.1(b)(ii) or Form 8.3, as appropriate) OPEN POSITIONS (Note 1) Product name, Written or Number of securities Exercise price Type, e.g. Expiry date e.g. call option purchased to which the option (Note 2) American, or derivative relates European etc. Option Purchased 125 4,400.0000 EURO 20/06/2008 Option Purchased -300,000 52.0000 AMER 15/02/2008 Option Purchased -300,000 56.0000 AMER 15/02/2008 Option Purchased -100,000 30.0000 AMER 20/06/2008 Option Purchased -1,000 3,500.0000 EURO 21/12/2007 Option Purchased -500 4,400.0000 EURO 21/12/2007 Option Purchased -350 5,200.0000 EURO 21/12/2007 Option Purchased -306 4,200.0000 EURO 21/12/2007 Option Purchased -300 3,800.0000 EURO 20/06/2008 Option Purchased -300 6,000.0000 EURO 21/12/2007 Option Purchased -275 4,800.0000 EURO 21/12/2007 Option Purchased -250 2,500.0000 EURO 20/06/2008 Option Purchased -250 5,200.0000 EURO 20/03/2008 Option Purchased -600,000 42.0000 AMER 21/12/2007 Option Purchased 100 5,600.0000 EURO 18/01/2008 Option Purchased 200,000 60.0000 AMER 18/01/2008 Option Purchased 125 4,400.0000 EURO 20/06/2008 Option Purchased 250 3,000.0000 EURO 20/06/2008 Option Purchased 250 3,300.0000 EURO 21/12/2007 Option Purchased 250 4,500.0000 EURO 21/12/2007 Option Purchased 250 6,000.0000 EURO 15/02/2008 Option Purchased 250 6,000.0000 EURO 15/02/2008 Option Purchased 250 3,800.0000 EURO 20/06/2008 Option Purchased 275 5,000.0000 EURO 21/12/2007 Option Purchased 306 4,800.0000 EURO 21/12/2007 Option Purchased 350 4,600.0000 EURO 19/12/2008 Option Purchased 350 4,600.0000 EURO 19/12/2008 Option Purchased 450 3,500.0000 EURO 21/12/2007 Option Purchased 500 5,200.0000 EURO 21/12/2007 Option Purchased 50 5,400.0000 EURO 20/03/2008 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 Rule 8 and its Notes which can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk

Companies

Barclays (BARC)
UK 100

Latest directors dealings