| Exhibit Number | | | | | | Description of Exhibit | | |
| 3.1 | | | | | | Memorandum and Articles of Association of Aon plc (Incorporated by reference to Exhibit 3.1 to Aon’s Current Report on Form 8-K filed with the SEC on June 4, 2021). | | |
| 4.1 | | | | | | First Indenture Supplement, dated June 22, 2023, among Aon Corporation, Aon plc, Aon Global Limited, Aon Global Holdings plc, Aon North America, Inc. and The Bank of New York Mellon Trust Company, N.A. (Incorporated by reference to Exhibit 4.14 to Aon plc’s Registration Statement on Form S-3 filed with the SEC on June 22, 2023). | | |
| 4.2 | | | | | | First Indenture Supplement, dated June 22, 2023, among Aon Corporation, Aon plc, Aon Global Limited, Aon Global Holdings plc, Aon North America, Inc. and The Bank of New York Mellon Trust Company, N.A. (Incorporated by reference to Exhibit 4.16 to Aon plc’s Registration Statement on Form S-3 filed with the SEC on June 22, 2023). | | |
| 4.3 | | | | | | First Indenture Supplement, dated June 22, 2023, among Aon plc, Aon Corporation, Aon Global Limited, Aon Global Holdings plc, Aon North America, Inc. and The Bank of New York Mellon Trust Company, N.A. (Incorporated by reference to Exhibit 4.18 to Aon plc’s Registration Statement on Form S-3 filed with the SEC on June 22, 2023). | | |
| 4.4 | | | | | | First Indenture Supplement, dated June 22, 2023, among Aon plc, Aon Corporation, Aon Global Limited, Aon Global Holdings plc, Aon North America, Inc. and The Bank of New York Mellon Trust Company, N.A. (Incorporated by reference to Exhibit 4.20 to Aon plc’s Registration Statement on Form S-3 filed with the SEC on June 22, 2023). | | |
| 4.5 | | | | | | First Indenture Supplement, dated June 22, 2023, among Aon plc, Aon Corporation, Aon Global Limited, Aon Global Holdings plc, Aon North America, Inc. and The Bank of New York Mellon Trust Company, N.A. (Incorporated by reference to Exhibit 4.22 to Aon plc’s Registration Statement on Form S-3 filed with the SEC on June 22, 2023). | | |
| 4.6 | | | | | | Sixth Indenture Supplement, dated June 22, 2023, among Aon Corporation, Aon plc, Aon Global Limited, Aon Global Holdings plc, Aon North America, Inc. and The Bank of New York Mellon Trust Company, N.A. (Incorporated by reference to Exhibit 4.29 to Aon plc’s Registration Statement on Form S-3 filed with the SEC on June 22, 2023). | | |
| 10.1# | | | | | | Amendment to International Assignment Letter, dated June 16, 2023, between Aon Corporation and Christa Davies (Incorporated by reference to Exhibit 10.1 to Aon plc’s Current Report on Form 8-K filed with the SEC on June 22, 2023). | | |
| 10.2# | | | | | | Amendment to International Assignment Letter, dated June 16, 2023, between Aon Corporation and Greg Case (Incorporated by reference to Exhibit 10.2 to Aon plc’s Current Report on Form 8-K filed with the SEC on June 22, 2023). | | |
| 10.3#* | | | | | | Aon plc 2011 Incentive Plan, As Amended and Restated. | | |
| 10.4* | | | | | | Amendment No. 1 to the Credit Agreement, dated as of May 3, 2023, by and among Citibank, N.A., as administrative agent, Aon Corporation, Aon UK Limited, Aon Global Holdings plc and Aon Global Limited, and the lenders party thereto. | | |
| 10.5* | | | | | | Guaranty Supplement from Aon North America, Inc. to Citibank, N.A., as administrative agent, dated June 22, 2023. | | |
| 10.6* | | | | | | Guaranty Supplement from Aon North America, Inc. to Citibank, N.A., as administrative agent, dated June 22, 2023. | | |
| 10.7#* | | | | | | Employment Agreement, effective as of July 1, 2023, between Aon Corporation and Eric Andersen. | | |
| 10.8#* | | | | | | Form of Performance Share Unit Agreement Under Aon plc 2011 Incentive Plan, as amended as restated. | | |
| 22.1* | | | | | | Subsidiary Guarantors and Issuers of Guaranteed Securities. | | |
| 31.1* | | | | | | Certification of CEO. | | |
| 31.2* | | | | | | Certification of CFO. | | |
| 32.1* | | | | | | Certification of CEO Pursuant to section 1350 of Title 18 of the United States Code. | | |
| 32.2* | | | | | | Certification of CFO Pursuant to section 1350 of Title 18 of the United States Code. | | |
| 101* | | | | | | Interactive Data Files. The following materials are filed electronically with this Quarterly Report on Form 10-Q: | | |
| | | | | | 101.SCH XBRL Taxonomy Extension Schema Document | | |
| | | | | | 101.CAL XBRL Taxonomy Calculation Linkbase Document | | |
| | | | | | 101.DEF XBRL Taxonomy Definition Linkbase Document | | |
| | | | | | 101.PRE XBRL Taxonomy Presentation Linkbase Document | | |
| | | | | | 101.LAB XBRL Taxonomy Calculation Linkbase Document | | |
| 104 | | | | | | Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) | | |
| * Filed herewith | | | | | | | | |
| # Indicates a management contract or compensatory plan or arrangement | | | | | | | | |