Company: ADP
Filing Date: 2025-05-07
Form Type: 424B2
Source: 0001193125-25-114878
Chunk: 52

Company: AUTOMATIC DATA PROCESSING INC
Filing Date: 2025-05-07
Form: 424B2
Chunk 52
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 be redeemed at our option, the trustee will select by lot or in such other manner in accordance with the customary procedures of the depositary, the debt securities of that series, or portions of the debt securities of that series, to be redeemed. Unless we default in the payment of the redemption price with respect to any debt securities called for redemption, interest will cease to accrue on such debt securities at the redemption date. (sections 3.02 and 3.03) ADP will not be required (i) to issue, register the transfer of or exchange any series of debt securities during a period beginning at the opening of business 15 days before the day of mailing of a notice of redemption and ending at the close of business on the day of such mailing, or (ii) to register the transfer of or exchange any debt securities of any series so selected for redemption in whole or in part, except the unredeemed portion of any such series of debt securities being redeemed in part. (section 2.05) Covenants Under the indenture, ADP agrees, among other things, to pay the interest, principal and any premium on the debt securities when due (section 4.01), and to maintain a place of payment (section 4.02). However, the covenants under the indenture do not, among other things:

| • |     | limit the amount of indebtedness or lease obligations that may be incurred by us and our subsidiaries; or |

| • |     | restrict us from paying dividends or making distributions on our capital stock or purchasing or redeeming our 
 capital stock.                                                                                                |

5

The applicable prospectus supplement may contain additional covenants that impose various restrictions on ADP and, as a result, afford the holders of its securities certain protections. You should review the full text of the covenants in the applicable prospectus supplement and supplemental indenture to evaluate the covenants. Consolidation, Merger or Sale We may not consolidate with or merge into, or convey, transfer or lease all or substantially all of our properties and assets to, any person unless:

| • |     | (a) we will be the continuing corporation or (b) the successor corporation or person formed by such                                                                                                                                                     
 consolidation or into which we are merged or to which all or substantially all of our property and assets are conveyed, transferred or leased is a corporation, partnership or trust organized and validly existing under the laws of the United States 
 of America, any State thereof or the