Transaction in Own Shares

ICAP plc (ICAP / the "Company")

Transaction in own shares

ICAP plc announces that on 25 May 2011 it purchased 125,000 of its 10p ordinary shares at a price of 469.9386 pence per ordinary share.

The shares purchased will be held as Treasury Shares and may be used to satisfy obligations under the Company's share plans.

Following the above purchase, the Company holds 4,153,154 ordinary shares as Treasury Shares. The total number of ordinary shares in issue (excluding shares held in treasury) is 660,122,518.

This share buyback is in accordance with the authority granted by shareholders at its annual general meeting in July 2010.

Contact:

Mike Sheard Director of Corporate Affairs, ICAP plc Tel: + 44 20 7050 7103

ICAP plc

26 May 2011