Exhibit 22.1

Subsidiary Guarantors and Issuers of Guaranteed Securities

The table below sets forth the respective issuers, co-issuers, and guarantors of the notes issued by Aon Global Limited, Aon Global Holdings plc, and Aon Corporation and the jurisdiction of incorporation of each such entity.

Aon CorporationAon Global LimitedAon North America, Inc.Aon Corporation and
Aon Global Holdings plc
EntityJurisdiction of Incorporation

8.205% Junior Subordinated Notes due 2027
4.50% Senior Notes due 2028
3.75 Senior Notes due 2029
2.8% Senior Notes due 2030
6.25% Senior Notes due 2040


3.875% Senior Notes due 2025
2.875% Senior Notes due 2026
4.25% Senior Notes due 2042
4.45% Senior Notes due 2043
4.60% Senior Notes due 2044
4.75% Senior Notes due 2045		5.125% Senior Notes due 2027
5.150% Senior Notes due 2029
5.300% Senior Notes due 2031
5.450% Senior Notes due 2034
5.750% Senior Notes due 2054		2.85% Senior Notes due 2027
2.05% Senior Notes due 2031
2.60% Senior Notes due 2031
5.00% Senior Notes due 2032
5.35% Senior Notes due 2033
2.90% Senior Notes due 2051
3.90% Senior Notes due 2052
Aon plcIrelandGuarantorGuarantorGuarantorGuarantor
Aon Global LimitedUKGuarantorIssuerGuarantorGuarantor
Aon Global Holdings plcUKGuarantorGuarantorGuarantorCo-Issuer
Aon CorporationUSIssuerGuarantorGuarantorCo-Issuer
Aon North America, Inc.USGuarantorGuarantorIssuerGuarantor