Company: ADP
Filing Date: 2025-09-25
Form Type: DEF 14A
Source: 0001308179-25-000607
Chunk: 0

Company: AUTOMATIC DATA PROCESSING INC
Filing Date: 2025-09-25
Form: DEF 14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934 (Amendment No. )

| ☑ | Filed by the Registrant | ☐ | Filed by a party other 
 than the Registrant    |

| CHECK THE APPROPRIATE BOX: |     |                                              |
| ☐                          |     | Preliminary Proxy Statement                  |
| ☐                          |     | Confidential, for Use of the Commission Only 
 (as permitted by Rule 14a-6(e)(2))           |
| ☑                          |     | Definitive Proxy Statement                   |
| ☐                          |     | Definitive Additional Materials              |
| ☐                          |     | Soliciting Material under §240.14a-12        |

Automatic Data Processing, Inc. (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

| PAYMENT OF FILING FEE (CHECK ALL BOXES THAT APPLY): |     |                                                                                                     |
| ☑                                                   |     | No fee required                                                                                     |
| ☐                                                   |     | Fee paid previously with preliminary materials                                                      |
| ☐                                                   |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

AUTOMATIC DATA PROCESSING, INC. One ADP Boulevard
Roseland, New Jersey 07068

| Notice of 2025 Annual Meeting of Stockholders |

The 2025 Annual Meeting of Stockholders of Automatic Data Processing, Inc. will take place at 10:00 a.m., Eastern Standard Time on Wednesday, November 12, 2025. The Annual Meeting will be held virtually and stockholders can access the meeting by visiting www.virtualshareholdermeeting.com/ADP2025 . A Notice of Internet Availability of Proxy Materials or the proxy statement for the 2025 Annual Meeting of Stockholders is first being mailed to stockholders on or about Thursday, September 25, 2025. The purposes of the meeting are to:

| 1. | Elect a board of directors;                                                                                                    |
| 2. | Hold an advisory vote on executive compensation;                                                                               |
| 3. | Ratify the appointment of Deloitte & Touche LLP as our independent registered