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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1140536	Willis Group Holdings Plc	WSH	Insurance Agents, Brokers & Service (6411)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1490240	J. Michael Somers	C/O Willis Group Holdings Plc 51 Lime Street London, England X0 EC3M 7DQ		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Ordinary Shares, Nominal Value $0.000115 Per Share	Acquisiton	2011-05-02	2,409	$0.00	5,278	No	4	A	Direct
Ordinary Shares, Nominal Value $0.000115 Per Share	Disposition	2011-05-03	1,386	$41.48	3,892	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	A	Direct
No	4	S	Direct

Footnotes

Comprised of 2,409 restricted share units ("RSUs"), which represent the right to recieve ordinary shares, par value $0.000115 per share, of Willis Group Holdings Public Limited Company. The RSUs shall vest 100% on May 2, 2012.
The sales reported in this Form 4 were pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 15, 2011 to cover taxes incurred on the vesting of 2,869 RSUs on May 3, 2011.
The number of securities disposed of represents the aggregate number of shares sold in multiple open market transactions having prices ranging from $41.24 to $41.58 per share. The price listed in Table I represents the weighted average sale price for such sales. The reporting person undertakes to provide the staff of the Securities and Exchange Commission, the Issuer, or a stockholder of the Issuer, upon request, information regarding the number of shares sold at each separate price within the range.
Includes 2,409 RSUs, subject to the satisfaction of vesting requirements. This amount gives effect to the RSUs that vested on May 3, 2011.