Company: ADP
Filing Date: 2025-05-07
Form Type: 424B2
Source: 0001193125-25-114878
Chunk: 42

Company: AUTOMATIC DATA PROCESSING INC
Filing Date: 2025-05-07
Form: 424B2
Chunk 42
---
 or only to “professional investors” as defined in the SFO and any rules made thereunder. Notice to Prospective Investors in Japan The Notes have not been and will not be registered pursuant to Article 4, Paragraph 1 of the Financial Instruments and Exchange Law of Japan (the “Financial Instruments and Exchange Law”) and each underwriter has agreed that it will not offer or sell the Notes, directly or indirectly, in Japan or to, or for the benefit of, any “resident” of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or to others for re-offeringor resale, directly or indirectly, in Japan or to or for the benefit of a resident of Japan, except pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the Financial Instruments and Exchange Law and any other applicable laws, regulations and ministerial guidelines of Japan in effect at the relevant time. Notice to Prospective Investors in Singapore This prospectus supplement and the accompanying prospectus have not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, each underwriter has represented and agreed that it has not S-31

offered or sold any Notes or caused the Notes to be made the subject of an invitation for subscription or purchase and will not offer or sell any Notes or cause the Notes to be made the subject of an invitation for subscription or purchase, and has not circulated or distributed, nor will it circulate or distribute, this prospectus supplement and the accompanying prospectus or any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the Notes, whether directly or indirectly, to any person in Singapore other than:

| • |     | to an institutional investor (as defined in Section 4A of the Securities and Futures Act (Chapter 289) of 
 Singapore, as modified or amended from time to time (the “SFA”)) pursuant to Section 274 of the SFA;      |

| • |     | to a relevant person (as defined in Section 275(2) of the SFA) pursuant to Section 275(1) of the SFA, 
 and in accordance with the conditions specified in Section 275 of the SFA; or                         |

| • |     | otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA. |

Where the Notes are subscribed or purchased under Section 275 of the S