Company: ADP
Filing Date: 2025-05-07
Form Type: 424B2
Source: 0001193125-25-114878
Chunk: 2

Company: AUTOMATIC DATA PROCESSING INC
Filing Date: 2025-05-07
Form: 424B2
Chunk 2
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 the Exchange Act until the offering of the Notes has been completed; provided that, unless otherwise stated, we will not incorporate by reference any filing that is “furnished” or deemed “furnished” to the SEC. The following documents filed with the SEC are incorporated by reference into this prospectus supplement:

ADP will provide without charge, upon written or oral request, a copy of any or all of the documents which are incorporated by reference in this prospectus supplement and the accompanying prospectus, other than exhibits which are specifically incorporated by reference into those documents. Requests should be directed to Investor Relations, Automatic Data Processing, Inc., One ADP Boulevard, Roseland, New Jersey 07068, telephone number (973) 974-5858.The information found on our website is not a part of this prospectus supplement or the accompanying prospectus. S-1

SUMMARY The Company Today, Automatic Data Processing, Inc. is one of the world’s leading global technology companies providing comprehensive cloud-based human capital management (HCM) solutions that unite HR, payroll, talent, time, tax and benefits administration. Our unmatched experience, expertise, insights and cutting-edge technology have transformed HCM from an administrative challenge to a strategic business advantage. Tailored to meet the needs of businesses of all sizes, we help them work smarter today so they can have more success tomorrow. We serve over 1.1 million clients and pay approximately 42 million workers in over 140 countries and territories. Our principal executive offices are located at One ADP Boulevard, Roseland, New Jersey 07068, and our telephone number is (973) 974-5000. THE OFFERING

| Issuer | Automatic Data Processing, Inc. |

| Notes Offered | $1,000,000,000 aggregate principal amount of 4.750% Senior Notes due 2032. |

| Ranking | The Notes will be direct, senior unsecured obligations of Automatic Data Processing, Inc. and will rank equally with all of our other direct, senior unsecured indebtedness from time to time outstanding and effectively subordinated to any of our 
 secured indebtedness from time to time outstanding, to the extent of the value of the assets securing such debt.                                                                                                                                     |

| As of March 31, 2025, we had $4,000.0 million of outstanding direct, senior unsecured indebtedness and no secured indebtedness, not including the debt of our subsidiaries. As of March 31, 2025, debt of 
 our subsidiaries