Holding(s) in Company

Oxford Catalysts Group PLC 18 July 2007 TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached (ii): Oxford Catalysts Group PLC 2. Reason for the notification (please state Yes/No): An acquisition or disposal of voting rights: (Yes) An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached: (No) An event changing the breakdown of voting rights: (No) Other (please specify) : (No) 3. Full name of person(s) subject to the notification obligation (iii): The University of Oxford 4. Full name of shareholder(s) (if different from 3.) (iv): - 5. Date of the transaction (and date on which the threshold is crossed or reached if different) (v): 13 July 2007 6. Date on which issuer notified: 16 July 2007 7. Threshold(s) that is/are crossed or reached: Reduction from 17.1% holding to 13% holding 8. Notified details: A: Voting rights attached to shares Class/type of shares if possible using Situation previous to the Triggering the ISIN CODE transaction (vi) Number of Number of voting Rights shares (viii) GB00B11SZ269 6,375,990 6,375,990 Resulting situation after the triggering transaction (vii) Class/type of shares if Number of Number of voting % of voting possible using the ISIN CODE shares rights (ix) rights Direct Direct (x) Indirect Direct Indirect (xi) 4,831,321 4,831,321 NIL 13% NIL B: Financial Instruments Resulting situation after the triggering transaction (xii) Type of Expiration Exercise/ Number of voting rights that may % of financial Date Conversion be acquired if the instrument is voting instrument (xiii) Period/ Date exercised/ converted. rights (xiv) N/A Total (A+B) Number of voting rights % of voting rights 4,831,321 13% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable (xv): N/A Proxy Voting: 10. Name of the proxy holder: N/A 11. Number of voting rights proxy holder will cease to hold: N/A 12. Date on which proxy holder will cease to hold voting rights: N/A 13. Additional information: N/A 14. Contact name: Dr William Barton 15. Contact telephone number: 01235 841 700 This information is provided by RNS The company news service from the London Stock Exchange

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