MCKESSON CORP — Director's Dealing 2015

May 27, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MCKESSON CORP (MCK)
CIK: 0000927653
Period of Report: 2015-05-24

Reporting Person: Schechter Lori A. (EVP, GC & Chief Compl. Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-24	Common Stock	M	2180	—	Acquired	2988.982	Direct
2015-05-24	Common Stock	F	820	$240.61	Disposed	2168.982	Direct
2015-05-24	Common Stock	M	174	—	Acquired	2342.982	Direct
2015-05-24	Common Stock	F	66	$240.61	Disposed	2276.982	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-05-24	Restricted Stock Units	$0	M	2180	Disposed		Common Stock (2180)	Direct
2015-05-24	Restricted Stock Units	$0	M	174	Disposed		Common Stock (174)	Direct
2015-05-26	Employee Stock Option (Right-to-buy)	$237.86	A	15842	Acquired	2022-05-26	Common Stock (15842)	Direct

Footnotes

F1: Includes 808.982 shares acquired in the ESPP.

F2: This transaction represents a withholding of shares to cover taxes applicable to a vesting of RSUs also reported on this Form 4.

F3: These units vested 100% on 5/24/2015.

F4: This option granted 05/26/2015 will vest 25% annually, commencing on the first anniversary of the grant date.