TP ICAP Regulatory News (TCAP)

15 Mar 2011 17:00

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are TULLETT PREBON PLC attached:

2 Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights X

An acquisition or disposal of qualifying financial instruments which may result

in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to the CREDIT SUISSE GROUP AG

notification obligation: 4. Full name of shareholder(s) CREDIT SUISSE SECURITIES (EUROPE) LTD (if different from 3.): CREDIT SUISSE ASSET MANAGEMENT LLC

5. Date of the transaction and date on which the threshold is crossed or 11/03/2011

reached:

6. Date on which issuer notified: 14/03/11 7. Threshold(s) that is/are crossed or 5%

reached: 8. Notified details:

A: Voting rights attached to shares Class/type of Situation previous Resulting situation after the triggering shares to the triggering transaction transaction if possible Number Number Number Number of voting % of voting rights using of of of shares rights the ISIN CODE Shares Voting Rights Direct Direct Indirect Direct Indirect ORD GB00B1H0DZ51 Not Not N/A N/A 10,801,005 N/A 5.0164% reportable reportable

B: Qualifying Financial Instruments Resulting situation after the triggering transaction

Type of financial Expiration Exercise/ Number of voting % of voting instrument date Conversion Period rights that may be rights acquired if the instrument is exercised/ converted. N/A C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financial Exercise Expiration Exercise/ Number of voting % of voting rightsinstrument price date Conversion rights instrument period refers to Nominal Delta N/A Total (A+B+C) Number of voting rights Percentage of voting rights 10,801,005 5.0164%

9. Chain of controlled undertakings through which the voting rights and/or the

financial instruments are effectively held, if applicable:

1. Credit Suisse Group AG 2. Credit Suisse AG

2.1. Credit Suisse Securities (Europe) Ltd 2.2. Credit Suisse Asset Management LLC

Proxy Voting: 10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease

to hold:

12. Date on which proxy holder will cease to hold

voting rights: 13. Additional information: 14. Contact name: Anthony Allen/ Liane Agostini

15. Contact telephone number: +44 (0) 20 7888 5416/ 3599

Note: Annex should only be submitted to the FSA not the issuer Annex: Notification of major interests in shares

A: Identity of the persons or legal entity subject to the notification

obligation Full name

(including legal form of legal entities) Credit Suisse Group AG

Contact address (registered office for legal entities) One Cabot Square, London E14 4QJ Phone number & email 020 7883 5416

Anthony.Allen@credit-suisse.com

Other useful information

(at least legal representative for legal Anthony Allen

persons)

B: Identity of the notifier, if applicable

Full name Contact address Phone number & email Other useful information

(e.g. functional relationship with the person or legal entity subject to the

notification obligation) C: Additional information Our ref: 1353535