Rule 8.3 - Tullett Prebon plc

KEY INFORMATION

                                                                            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)

KEY INFORMATION

Name of person dealing  (Note 1) Jupiter Asset Management Limited     Company dealt in Tullett Prebon plc   Class of relevant security to which the Ordinary shares dealings being disclosed relate (Note 2)     Date of dealing 18 March 2010  

2.INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a)Interests and short positions (following dealing)

  Long Short     Number                     Number                                 (%)                           (%) (1) Relevant securities 14,878,579 (6.910%)     (2) Derivatives (other than -   options)   (3)Options and agreements to -   purchase/sell   Total 14,878,579 (6.910%)    

(b)Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3)

Class of relevant security: Long Short     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   N/A N/A

3.DEALINGS (Note 4)

(a)Purchases and sales

  Number of securities Price per unit(Note 5)         n/a

(b)Derivatives transactions (other than options)

Product name, Long/short(Note 6) Number of securities(Note Price per unit(Note e.g. CFD   7) 5)     CFD Sale long 50,000 369.3452p     CFD Purchase long 50,000 363.8450p  

(c)Options transactions in respect of existing securities (i)Writing, selling, purchasing or varying

Product Writing, Number of Exercise Type, e.g. Expiry Option money name, selling, securities to price American, Date paid/received e.g.  purchasing, which the European per unit call varying etc. option etc. (Note 5) option relates(Note   7) N/A            

(ii)Exercising

Product name, e.g. call Number of securities Exercise price per unit(Note option 5) N/A      

(d)Other dealings (including new securities) (Note 4)

Nature of transaction(Note 8) Details Price per unit (if applicable) (Note 5)   N/A    

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.      

Is a Supplemental Form 8 attached?(Note 9)NO

Date of disclosure 19 March 2010 Contact name Shannon Craddock Telephone number 0207 314 4775 If a connected EFM, name of offeree/offeror with which   connected  

Notes

The Notes on Form 8.3 can be viewed on the Takeover Panel's website atwww.thetakeoverpanel.org.uk

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