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DocuSign Envelope ID: 24E77EC6-05C0-4CEA-862B-946321DD6A4C

EXECUTION VERSION

FOURTH AMENDMENT  TO THE
AON SUPPLEMENTAL SAVINGS PLAN
(As amended and restated effective January 1, 2017)

This Fourth Amendment to the Aon Supplemental Savings Plan, as amended and restated as of January 1, 2017 (the “Plan”), is adopted by Aon Corporation, a Delaware corporation (the “Company”) and wholly owned subsidiary of Aon plc (“Aon”), to be effective as set forth below.

WHEREAS, pursuant to Section 7.05 of the Plan, the Board, or any person or entity authorized by the Board, has the authority to amend the Plan and, pursuant to Section 1.06 of the Plan, the Board has delegated its obligations, responsibilities, and duties with respect to the Plan to the Organization and Compensation Committee of the Board of Directors of Aon (the “Committee”); and

WHEREAS, pursuant to resolutions of the Committee dated June 13, 2016, the Committee agreed to assume from the Board the duties and responsibilities of the Company as the sponsor of the Plan; and

WHEREAS, pursuant to the resolutions of the Committee dated March 26, 2020, the Committee approved, and delegated to Company management authority to amend the Plan to reflect, suspending a portion of the Safe Harbor Supplemental Match Contribution to the Plan, effective May 1, 2020.

NOW, THEREFORE, the Plan is hereby amended as follows, effective as of the dates set forth below:

1.    By deleting Section 3.04 of the Plan in its entirety and replacing it with the following, effective as of March 26, 2020:

“3.04 Determining Safe Harbor Supplemental Match Contribution. Effective January 1, 2016, a Participant's Safe Harbor Supplemental Match Contribution for the Plan Year shall be an amount equal to (i) the sum of (x) the Participant's Compensation (determined without reference to the limit established under Code Section 401(a)(17) as indexed) to the extent paid during any period of the Plan Year when the Participant is eligible to receive the Safe Harbor Match under the Aon Savings Plan, plus (y) any deferrals made by the Participant into the Aon Deferred Compensation Plan during any period of the Plan Year when the Participant is eligible to receive the Safe Harbor Match under the Aon Savings Plan, up to an aggregate maximum of
$500,000, minus (y) the Participant's Compensation during the Plan Year that is recognized for purposes of the Safe Harbor Match under the Aon Savings Plan; multiplied by (ii) the Participant's allocation rate for the Plan Year, determined in accordance with the following schedule based on the Participant's full Years of Participation (as defined in and determined under the Aon Savings Plan) as of the last day of the Plan Year; plus (iii) the amount of Safe Harbor Match that the Participant would have received under the Aon Savings Plan during the Plan Year were it not for the application of the limit established under Code Section 401(a)(17) as indexed, minus (iv) the amount of Safe Harbor Match that the Participant actually received under the Aon Savings Plan during the Plan Year.

						
	Years of Service
	Allocation Rate

	Less than 5 years
	3%
	5 to 9 years
	4%
	10 to 14 years
	5%
	15 or more years
	6%

Effective May 1, 2020, a Participant's Safe Harbor Supplemental Match Contribution shall be an amount equal to (i) the amount of Safe Harbor Match that the Participant would have received under the Aon Savings Plan during the Plan Year were it not for the application of the limit established under Code Section 401(a)(17) as indexed, minus (ii) the amount of Safe Harbor Match that the Participant actually received under the Aon Savings Plan during the Plan Year. The Safe Harbor Supplemental Match Contribution for the portion of the Plan Year prior to May 1, 2020, shall be the amount determined as of April 30, 2020.”

DocuSign Envelope ID: 24E77EC6-05C0-4CEA-862B-946321DD6A4C

EXECUTION VERSION

.”
IN WITNESS WHEREOF, the Company has caused this Amendment to the Plan to be executed on its behalf by its duly authorized officers, this    day of March, 2020.
31-Mar-2020

AON CORPORATION

By:

Lisa Stevens
Chief People OfficerDocument

DocuSign Envelope ID: 50D3DA6B-84B5-4E04-8E9E-3B85CB8D6C2C

EXECUTION VERSION

FIFTH AMENDMENT TO THE
AON SUPPLEMENTAL SAVINGS PLAN
(As amended and restated effective January 1, 2017)

This Fifth Amendment to the Aon Supplemental Savings Plan, as amended and restated as of January 1, 2017 (the “Plan”), is adopted by Aon Corporation, a Delaware corporation (the “Company”) and wholly owned subsidiary of Aon plc (“Aon”), to be effective as set forth below.

WHEREAS, pursuant to Section 7.05 of the Plan, the Board, or any person or entity authorized by the Board, has the authority to amend the Plan and, pursuant to Section 1.06 of the Plan, the Board has delegated its obligations, responsibilities, and duties with respect to the Plan to the Organization and Compensation Committee of the Board of Directors of Aon (the “Committee”); and

WHEREAS, pursuant to resolutions of the Committee dated June 13, 2016, the Committee agreed to assume from the Board the duties and responsibilities of the Company as the sponsor of the Plan; and

WHEREAS, pursuant to the resolutions of the Committee dated December 17, 2020, the Committee approved, and delegated to Company management authority to execute the Plan amendment to reflect, reinstating the Safe Harbor Supplemental Match Contribution to the Plan, effective January 1, 2021.

NOW, THEREFORE, the Plan is hereby amended as follows, effective December 17, 2020:

1.    By deleting the last paragraph of Section 3.04 of the Plan in its entirety and replacing it with the following:

“Notwithstanding the foregoing, a Participant's Safe Harbor Supplemental Match Contribution for the portion of the Plan Year beginning May 1, 2020 and ending December 31, 2020, shall be an amount equal to (i) the amount of Safe Harbor Match that the Participant would have received under the Aon Savings Plan during the Plan Year were it not for the application of the limit established under Code Section 401(a)(17) as indexed, minus (ii) the amount of Safe Harbor Match that the Participant actually received under the Aon Savings Plan during the Plan Year. The Safe Harbor Supplemental Match Contribution for the portion of the Plan Year prior to May 1, 2020, shall be the amount determined as of April 30, 2020.”

IN WITNESS WHEREOF, the Company has caused this Amendment to the Plan to be executed on its behalf by its duly authorized officers, this   21st   day of December 2020.

AON CORPORATION

By:

21-Dec-2020

Lisa Stevens
Chief People OfficerDocument

        

VIA EMAIL
November __, 2020        
[Name]
[Email address]
RE:    ACKNOWLEDGMENT OF TAX EQUALIZATION PROCESS
Dear [Name]:
As you are aware, Aon plc (the “Company”) maintains a tax equalization process that is intended to ensure that the income and social taxes you pay on compensation for services as a non-management member of the Company’s Board of Directors (the “Board”) will be no more than what you would have paid had all such compensation been taxable solely in your home country.  
As part of the tax equalization process, the Company initially pays taxes on your behalf in Ireland (and in the U.K. for the first quarter of 2020), which the Company expects will later be credited or refunded to you, and then determines an estimate of the tax liability that you would pay on your compensation from the Company if such compensation was taxable only in your home country, known as your “hypothetical” tax liability.  This hypothetical tax liability is calculated based on all Board fees and other compensation paid to you by the Company, including from the granting or vesting of stock-based awards. 
The Company will authorize and direct a tax adviser to prepare your joint or individual Irish and U.K. tax returns, as required.  You are responsible for the cost associated with such services, which will be reduced from your quarterly retainer fees.  At the end of each year, the Company, in consultation with this tax adviser, will determine your final hypothetical tax liability, the amount that will be credited or refunded to you in respect of the taxes paid on your behalf in Ireland and the U.K., and the amount of your overall tax liability.  
If the Company determines that your overall tax liability exceeds your final hypothetical tax liability, taking into account any credits and refunds expected to be paid or credited to you, the Company will make a tax equalization payment to you (subject to any applicable maximum dollar amount set forth from time to time by the Board) within 60 days of the relevant tax returns being finalized, as long as you meet your obligations to the Company in respect of your hypothetical tax liability and provide such information and assistance as the Company or its designated tax adviser requires in order to resolve your tax affairs on a timely basis and within the filing deadlines set by the applicable tax authorities.
If the Company determines that your overall tax liability, taking into account any credits and refunds expected to be paid or credited to you, is less than your final hypothetical tax liability (not taking into account any credits or refunds), then you will be required to pay the difference to the Company within 60 days of the relevant tax returns being finalized.
Please note that you will be responsible for the cost of any tax or additional charges arising in any tax jurisdiction on any personal income or gains, spousal income, or any other income not attributable to your service with the Company.

Although the Company will retain an external tax adviser on your behalf to prepare your tax returns and tax equalization calculations, it remains your personal obligation to file such returns within the 

applicable time limits and to abide by the tax laws in each of Ireland and the U.K.  The external tax adviser will provide regular information regarding your obligations and filing schedules.
If the foregoing is acceptable to you, please sign in the space provided below and return this letter agreement via DocuSign.  By signing below, you specifically agree acknowledge and agree that if you are determined to owe any amounts to the Company then you will make payment of such amounts to the Company within 60 days of receiving notification of the amount due; and you hereby authorize the Company to deduct (or reduce from your compensation) any amounts owed to you by the Company where permitted by law.
Sincerely,
                        
Lisa Stevens                                                      Chief People Officer
AGREED AND ACKNOWLEDGED:
                        
Print name:                    
Date:                        
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