X0303 4 2010-06-21 0001140536 WILLIS GROUP HOLDINGS PLC WSH 0001396690 HEARN PETER C C/O WILLIS GROUP HOLDINGS PLC 51 LIME STREET LONDON, ENGLAND X0 EC3M 7DQ UNITED KINGDOM 1 CEO, Willis Re Ordinary Shares, nominal value $0.000115 per share 2010-06-21 4 S 0 1425 32.6 D 83169.2908 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 29, 2010. The sales were made to cover taxes under the 10B5-1 plans as a result of the vesting of restricted stock units. Includes an aggregate of 41,486 restricted stock units, subject to the satisfaction of vesting requirements, and 2,013.2908 ordinary shares under the Issuer's Employee Stock Purchase Plan. /s/ Peter C. Hearn 2010-06-23