Company: ADP
Filing Date: 2025-05-07
Form Type: 424B2
Source: 0001193125-25-114878
Chunk: 9

Company: AUTOMATIC DATA PROCESSING INC
Filing Date: 2025-05-07
Form: 424B2
Chunk 9
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0, between Automatic Data Processing, Inc. and U.S. Bank Trust Company,
National Association (as successor in interest to U.S. Bank National Association), as trustee, as supplemented by the fourth supplemental indenture to be dated as of May 8, 2025 (collectively, the “indenture”).

The following statements relating to the Notes and the indenture are summaries of certain provisions thereof and are subject to, and qualified
in their entirety by reference to, the detailed provisions of the form of the Notes, the indenture and any supplemental indenture, officer’s certificate or similar document related to the Notes. Certain provisions of the indenture are
summarized in the accompanying prospectus. We encourage you to read the summaries of the Notes and the indenture in both this prospectus supplement and the accompanying prospectus, as well as the form of the Notes and the indenture and any
supplemental indenture, officer’s certificate or similar document related to the Notes.

General Terms of Notes

Interest and principal will be payable in U.S. dollars. The Notes will be issued only in minimum denominations of $2,000 and integral multiples
of $1,000 in excess thereof. There will be no sinking fund payments for the Notes. We do not intend to apply for the listing of the Notes on a national securities exchange or for quotation of the Notes on any automated dealer quotation system.

The security registrar and transfer agent for the Notes will be U.S. Bank National Association until such time as a successor security
registrar or transfer agent is appointed.

We may, without the consent of the noteholders, issue additional Notes having the same ranking
and the same interest rate, maturity and other terms as the Notes offered by this prospectus supplement (except for the issue date, the public offering price, the payment of interest accruing prior to the issue date of such additional Notes and the
first payment of interest following such issue date). Any such additional Notes will have the same terms as the Notes, provided that, if any additional Notes subsequently issued are not fungible for U.S. federal income tax purposes with any Notes
previously issued, such additional Notes shall trade under a separate CUSIP number.

Interest

The Notes will be initially limited to $1,000,000,000 aggregate principal amount. The Notes will bear interest at 4.750% per year. Interest
will be payable semi-annually in arrears on May 8 and November 8 of each