Filed pursuant to Rule 433
Relating to Preliminary Prospectus Supplement dated February 23, 2022 to
Prospectus dated May 12, 2020
Registration Statement Nos. 333-238189, 333-238189-01, 333-238189-02 and 333-238189-03
Aon Corporation and Aon Global Holdings plc
$600,000,000 2.850% SENIOR NOTES DUE 2027 (the “2027 Notes”)
$900,000,000 3.900% SENIOR NOTES DUE 2052 (the “2052 Notes”)
(together, the “Notes”)
PRICING TERM SHEET
Terms Applicable to the Notes

Issuers:	  	Aon Corporation and Aon Global Holdings plc	
		
Guarantors:	  	Aon plc and Aon Global Limited	
		
Offering Format:	  	SEC Registered	
		
Expected Ratings*:	  	Moody’s Investors Service: Baa2
Standard & Poor’s: A-
Fitch: BBB+	
		
Ranking:	  	Senior Unsecured	
		
Trade Date:	  	February 23, 2022	
		
Settlement Date (T+3)**:	  	February 28, 2022	
		
Denominations:	  	$2,000 and multiples of $1,000	
		
Joint Book-Running Managers:	  	Morgan Stanley & Co. LLC
Barclays Capital Inc.
Credit Suisse Securities (USA) LLC
Deutsche Bank Securities Inc.	
		
Co-Managers:	  	Aon Securities LLC
ANZ Securities, Inc.
BNY Mellon Capital Markets, LLC
nabSecurities, LLC
Scotia Capital (USA) Inc.
UniCredit Capital Markets LLC
U.S. Bancorp Investments, Inc.	
		
Principal Amount:	  	$600,000,000 for the 2027 Notes
$900,000,000 for the 2052 Notes	
		
Maturity Date:	  	May 28, 2027 for the 2027 Notes
February 28, 2052 for the 2052 Notes	

			
Reference Treasury:	  	UST 1.500% due January 31, 2027 for the 2027 Notes
UST 1.875% due November 15, 2051 for the 2052 Notes	
		
Reference Treasury Price and Yield:	  	98-05+; 1.890% for the 2027 Notes
91-05; 2.287% for the 2052 Notes	
		
Reoffer Spread to Reference Treasury:	  	+97 bps for the 2027 Notes
+170 bps for the 2052 Notes	
		
Re-offer Yield:	  	2.860% for the 2027 Notes
3.987% for the 2052 Notes	
		
Coupon:	  	2.850% for the 2027 Notes
3.900% for the 2052 Notes	
		
Interest Payment Dates:	  	Semi-annually in arrears on May 28 and November 28 beginning on November 28, 2022 for the 2027 Notes (long first coupon)
 
Semi-annually in arrears on February 28 and August 28, beginning on August 28, 2022 for the 2052 Notes	
		
Price to Public:	  	99.944% for the 2027 Notes
98.486% for the 2052 Notes	
		
Proceeds to Issuers (before deducting our offering expenses and underwriting discounts):	  	$1,486,038,000 for the Notes	
		
CUSIP / ISIN:	  	03740L AD4 / US03740LAD47 for the 2027 Notes
03740L AE2 / US03740LAE20 for the 2052 Notes	
		
Optional Redemption:	  	Prior to April 28, 2027 (one month prior to the 2027 Notes maturity date) (the “2027 Par Call Date”), and prior to August 28, 2051 (six months prior to the 2052 Notes maturity date) (the “2052 Par Call Date” and together with the 2027 Par Call Date, each a “Par Call Date”), the Issuers may redeem the 2027 Notes and/or the 2052 Notes at their option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of the principal amount and rounded to three decimal places) equal to the greater of:
 
(1) (a) the sum of the present values of the remaining scheduled payments of principal and interest on the Notes of such series being redeemed discounted to the redemption date (assuming the Notes of such series being redeemed matured on the applicable Par Call Date) on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate (as defined under “Description of the Securities—Optional Redemption”), plus 15 basis points (0.150%), in the case of the 2027 Notes, and plus 30 basis points (0.300%), in the case of the 2052 Notes less, (b) interest accrued to the date of redemption,	
 
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	  	and
 
(2) 100% of the principal amount of the Notes of such series being redeemed,
 
plus, in either case, accrued and unpaid interest on the principal amount of the Notes of such series being redeemed to the redemption date.100% of the principal amount of the Notes of such series being redeemed,
 
On or after the applicable Par Call Date, the Issuers may redeem the 2027 Notes and/or the 2052 Notes, in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the Notes of such series being redeemed plus accrued and unpaid interest thereon to the redemption date.
 
See “Description of the Securities—Optional Redemption” and “Description of the Securities—Optional Tax Redemption” in the preliminary prospectus supplement for more information.	
		
Conflicts of Interest:	  	Aon Securities LLC is an indirect wholly owned subsidiary of Aon Corporation. This offering is subject to, and will be conducted in compliance with, the requirements of Rule 5121 of the Financial Industry Regulatory Authority, Inc. (“FINRA”) regarding a FINRA member firm distributing the securities of an affiliate.	
*Note: An explanation of the significance of ratings may be obtained from the rating agencies. Generally, rating agencies base their ratings on such material and information, and such of their own investigations, studies and assumptions, as they deem appropriate. The rating of the Notes should be evaluated independently from similar ratings of other securities. A credit rating of a security is not a recommendation to buy, sell or hold securities and may be subject to review, revision, suspension, reduction or withdrawal at any time by the assigning rating agency.
**Note: Under Rule 15c6-1 under the Securities Exchange Act of 1934, as amended, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes offered hereby on the date of pricing will be required, by virtue of the fact that such Notes initially will settle T+3, to specify an alternate settlement cycle at the time of any such trade to prevent a failed settlement. Purchasers of these Notes who wish to trade the Notes on the date of pricing should consult their own advisors.
The issuers and the guarantors have filed a registration statement, including a prospectus, with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the issuers have filed with the SEC for more complete information about the issuers, the guarantors and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the Joint Book-Running Managers in the offering will arrange to send you the prospectus if you request it by contacting Morgan Stanley & Co. LLC at 1-866-718-1649, Barclays Capital Inc. at 1-888-603-5847, Credit Suisse Securities (USA) LLC at 1-800-221-1037 or Deutsche Bank Securities Inc. 1-800-503-4611.
 
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