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: Spratt Randall N (EVP, CTO & CIO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-24	Common Stock	M	22950	—	Acquired	41648.981	Direct
2015-05-24	Common Stock	F	11511	$240.61	Disposed	30137.914	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-05-24	Restricted Stock Units	$0	M	22950	Disposed		Common Stock (22950)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	39978	Indirect
Common Stock	2750.2315	Indirect

Footnotes

F1: Includes 862.981 shares acquired in the ESPP and held in Fidelity account.

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

F3: Includes 7,388 shares acquired in the ESPP and transferred to Wells Fargo trust account.

F4: These units vested 100% on 5/24/2015.