Company: ADP
Filing Date: 2025-05-07
Form Type: 424B2
Source: 0001193125-25-114878
Chunk: 55

Company: AUTOMATIC DATA PROCESSING INC
Filing Date: 2025-05-07
Form: 424B2
Chunk 55
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 or the indenture or unduly prejudicial to the rights of holders of 
 any other series of debt securities outstanding under the indenture; and                                          |

| • |     | unless otherwise provided under the Trust Indenture Act, the trustee need not take any action that might involve 
 it in personal liability. (section 6.06)                                                                         |

A holder of the debt securities of a particular series will only have the right to institute a proceeding under the indenture or to appoint a receiver or trustee, or to seek other remedies, in each case with respect to such series of debt securities, if:

| • |     | the holder has given written notice to the trustee of a continuing event of default; |

| • |     | in the case of an event of default relating to the payment of principal, any premium or interest, the holders of                                                                     
 at least 25% in aggregate principal amount of the outstanding debt securities of the particular series have made written request to the trustee to institute proceedings as trustee; |

| • |     | in the case of an event of default not relating to payment of principal, any premium or interest, the holders of                                                                                                                                
 at least 25% in aggregate principal amount of the outstanding debt securities of all series affected by such event of default (voting together as a single class) have made written request to the trustee to institute proceedings as trustee; |

| • |     | such holders have offered the trustee indemnity or security reasonably satisfactory to it to cover the cost of 
 the proceedings; and                                                                                           |

| • |     | the trustee does not institute a proceeding, and does not receive conflicting directions from a majority in                                                                                                                                 
 principal amount of the outstanding debt securities of (i) the particular series, in the case of an event of default relating to the payment of principal, any premium or interest, or (ii) all affected series, in the case of an event of 
 default not relating to the payment of principal, any premium or interest, in each case, within 60 days of receiving the written notice of an event of default. (section 6.04)                                                              |

7

Discharge, Defeasance and Covenant Defeasance We can discharge or defease our obligations under the indenture as set forth below. We may discharge our obligations to the beneficial owners of any series of debt securities that have not already been delivered to the trustee for cancellation and that have either become due and payable or are by their terms to become due and payable within one year