MCK: Leadership change · Company disclosure

Item 5.02 Departure of Certain Officers On June 29, 2026, Thomas L. Rodgers, the company’s Executive Vice President, Chief Strategy and Business Development Officer and a named executive officer, gave notice of his intention to retire from that role. His last day of employment will be August 1, 2026. Item 7.01 Regulation FD Disclosure To support an orderly transition, the company appointed Ramesh Srinivasan as Executive Vice President, Chief Strategy Officer, effective on August 1, 2026. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 104 Cover Page Interactive Data File - the cover page iXBRL tags are embedded within the Inline XBRL document 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 hereunto duly authorized. Date: July 1, 2026 McKesson Corporation By: /s/ Michele Lau Michele Lau Executive Vice President and Chief Legal Officer