AUTOMATIC DATA PROCESSING INC 10-Q

Item 5. Other Information During the fiscal quarter ended September 30, 2024, our executive officers adopted the following trading arrangements that are intended to satisfy the affirmative defense of Rule 10b5–1(c) . Name & Title Date of Adoption Duration of Trading Arrangement The maximum number of securities to be sold pursuant to the trading arrangement (1) John Ayala , Chief Operating Officer September 10, 2024 January 3, 2025 – December 31, 2025 47,709 Maria Black , President and Chief Executive Officer September 6, 2024 January 3, 2025 – December 31, 2025 46,783 Michael Bonarti , Chief Administrative Officer September 9, 2024 February 3, 2025 – December 31, 2025 43,905 Christopher D’Ambrosio , Chief Strategy Officer September 9, 2024 February 10, 2025 – December 30, 2025 2,856 Joseph DeSilva , President, Global Sales September 9, 2024 January 2, 2025 – December 31, 2025 19,827 Sreeni Kutam , President, Global Product and Innovation September 6, 2024 January 2, 2025 – December 31, 2025 49,907 David Kwon , Chief Legal Officer/General Counsel September 5, 2024 January 2, 2025 – December 31, 2025 3,470 Jonathan Lehberger , Corporate Controller September 5, 2024 January 2, 2025 – December 31, 2025 4,803 Don McGuire , Chief Financial Officer September 6, 2024 January 2, 2025 – December 31, 2025 24,387 Carlos Rodriguez , Director September 5, 2024 January 7, 2025 – December 31, 2025 145,246 (1) Securities reported in this column reflect options, restricted stock units (“RSUs”), performance-based stock units (“PSUs”) and shares of common stock, as appropriate. In the case of RSUs, quantities included in this column reflect the full amount of RSUs as reported in an officer’s respective plan and do not reflect the impact of tax withholding which will not be determined until the RSUs vest. In the case of PSUs (which have a three-year performance period), quantities included in this column reflect the application of the actual performance factor for tranches where performance has been certified, application at target for tranches where performance is not yet complete, and inclusion of accrued dividend equivalents through the date of adoption of the trading arrangement. The PSU amounts do not reflect the impact of tax withholding which will not be determined until the PSUs vest. In addition, securities reported in this column include securities subject to limit orders and such orders may not fill if limit order conditions are not met. 39 Item 6. Exhibits Exhibit Number Exhibit 31.1 Certification by Maria Black pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934 31.2 Certification by Don McGuire pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934 32.1 Certification by Maria Black pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32.2 Certification by Don McGuire pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 101.INS Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document 101.SCH Inline XBRL Taxonomy Extension Schema 101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase 101.LAB Inline XBRL Taxonomy Label Linkbase 101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase 101.DEF Inline XBRL Taxonomy Extension Definition Document 104 Cover Page Interactive Data File - the cover page interactive data file does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document 40 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. AUTOMATIC DATA PROCESSING, INC. (Registrant) Date: November 1, 2024 /s/ Don McGuire Don McGuire Chief Financial Officer (Title) 41