Parker-Hannifin Corp

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. )

Check the appropriate box:

PARKER-HANNIFIN CORPORATION

(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):

Parker-Hannifin Corporation is a Fortune 250 global leader in motion and control technologies. For more than a century, the Company has engineered the success of its customers in a wide range of diversified industrial and aerospace markets.

The Win Strategy™

The Win Strategy is our business system that defines the goals and initiatives that drive growth, transformation and success.

Our Values

Our values shape our culture and our interactions with stakeholders and the communities in which we operate and live.

Our Purpose

Our purpose statement defines our unique contribution to the world, creating a strong sense of pride and inspiration for our global team members.

Enabling Engineering Breakthroughs that Lead to a Better Tomorrow

Notice of Annual Meeting of Shareholders

To Our Shareholders:

You are cordially invited to attend the Annual Meeting of Shareholders of Parker-Hannifin Corporation. The meeting will be held at our headquarters located at 6035 Parkland Boulevard, Cleveland, Ohio 44124, on Wednesday, October 28, 2026 at 9:00 a.m., Eastern Daylight Time, for the following purposes:

Voting Items

and to transact such other business as may properly come before the meeting.

Shareholders of record at the close of business on September 4, 2026 are entitled to vote at the meeting. On September 4, 2026, 126,112,415 shares were outstanding and entitled to vote at the meeting. Each share is entitled to one vote. This Proxy Statement and the form of proxy are being mailed to shareholders on or about September 18, 2026. Your vote is important, so if you do not expect to attend the meeting, or if you do plan to attend but wish to vote by proxy, please mark, date, sign and return the enclosed proxy card promptly in the envelope provided or vote electronically via the internet or by telephone in accordance with the instructions on the proxy card. Please refer to the section“General Information About the Annual Meeting” for more information.

Thank you for your support of Parker-Hannifin Corporation.

By Order of the Board of Directors

Joseph R. Leonti

Secretary

September 18, 2026

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Shareholders to be held on October 28, 2026.This Proxy Statement, along with our Annual Report on Form 10-K for the fiscal year ended June 30, 2026, is available free of charge on our investor relations website (investors.parker.com).