X0508 4/A 2024-10-23 2024-10-25 0000076334 Parker-Hannifin Corp PH 0001227063 WAINSCOTT JAMES L 6035 PARKLAND BOULEVARD CLEVELAND OH 44124 1 0 0 0 0 Restricted Stock Units 2024-10-23 4 A 0 299 0 A 21709 D Award of Restricted Stock Units on October 23, 2024 will vest on the later of (a) one year from the grant date; or (b) on the date of our next Annual Shareholders Meeting. Includes 5 shares acquired as a dividend reinvestment feature under the Parker-Hannifin Corporation 2023 Omnibus Stock Incentive Plan. Exhibit List: Exhibit 24 Power of Attorney: On October 25, 2024, the reporting person filed a Form 4 which inadvertently failed to include an updated Power of Attorney. The sole purpose of this Amendment is to file the Power of Attorney filed herewith as Exhibit 24. The transaction included on this report was previously included on the Form 4 filed by the reporting person on October 25, 2024 and has not been revised. /s/ Stephanie R. Breitenbach, Attorney-in-Fact 2025-04-25