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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
315293	Aon Plc	AON	Insurance Agents, Brokers & Service (6411)	363051915

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1407939	J Gregory Besio	C/O Aon Corporate Law Dept 200 East Randolph Street, 8Th Fl Chicago IL 60601	Evp/Chief Hr Officer	No	Yes	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
Class A Ordinary Shares	Acquisiton	2012-08-01	10,274	$38.93	87,680	No	4	M	Direct
Class A Ordinary Shares	Disposition	2012-08-01	10,274	$49.57	77,406	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Ordinary Shares	Employee Share Option (Right to Buy)	Disposition	2012-08-01	10,274	$0.00	10,274	$38.93

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2015-03-19	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Class A Ordinary Shares	7,739	Indirect	Through Aon Savings Plan and Supplemental Savings Plan

Footnotes

Includes 188.002 shares acquired pursuant to the Aon employee stock purchase plan and shares acquired pursuant to dividend reinvestment.
The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $49.55 to $49.63, inclusive. The reporting person undertakes to provide to Aon plc, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Vesting of the options occurred in accordance with the terms of the Aon Stock Incentive Plan as follows: one-third of the options vested on each of the first through third anniversaries of the date of grant. The date of grant was March 19, 2009
Share option granted pursuant to the Aon Stock Incentive Plan.