X0306 4 2022-07-22 0000927653 MCKESSON CORP MCK 0001282198 KNAUSS DONALD R 6555 STATE HWY 161 IRVING TX 75039 1 0 0 0 Common Stock 1296 I Trust Restricted Stock Units (RSUs) 0 2022-07-22 4 A 0 606 0 A Common Stock 606 606 D Restricted Stock Units (RSUs) 0 2022-07-22 4 A 0 364 0 A Common Stock 364 364 D As Trustee of the DONALD AND ELLIE KNAUSS TRUST U/A DTD 03/12/2007 RSUs granted pursuant to an automatic annual grant under the 2013 Stock Plan. This grant vests immediately, however, receipt of the underlying shares is deferred until the Director leaves the Board. RSU granted pursuant to an automatic annual grant under the 2013 Stock Plan for the Chairman of the Board. This grant vests immediately, however, receipt of the underlying shares is deferred until the Director leaves the Board. Laura Heiman, Attorney-in-fact 2022-07-26