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.    )

    Filed by the Registrant ☐    Filed by a Party other than the Registrant

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☐	Preliminary Proxy Statement
☐	CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2))
☐	Definitive Proxy Statement
	Definitive Additional Materials
☐	Soliciting Material Pursuant to §240.14a-12

McKESSON CORPORATION

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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*** Exercise Your Right to Vote ***
Important Notice Regarding the Availability of Proxy Materials for the
Stockholder Meeting to Be Held on July 25, 2018.
McKESSON CORPORATION
Meeting Information
Meeting Type: Annual Meeting
For holders as of: May 31, 2018
Date: July 25, 2018 Time: 8:30 A.M. CDT
Location: Dallas/Fort Worth Airport Marriott
8440 Freeport Parkway
Irving,TX 75063
McKESSON CORPORATION
C/O CORPORATE SECRETARY’S DEPARTMENT ONE POST STREET, 33RD FLOOR
SAN FRANCISCO, CA 94104
You are receiving this communication because you hold shares in the company named above.
This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side).
We encourage you to access and review all of the important information contained in the proxy materials before voting.
See the reverse side of this notice to obtain proxy materials and voting instructions.

Before You Vote
How to Access the Proxy Materials
Proxy Materials Available to VIEW or RECEIVE:
NOTICE AND PROXY STATEMENT ANNUAL REPORT
How to View Online:
Have the information that is printed in the box marked by the arrow gXXXX XXXX XXXX XXXX (located on the
following page) and visit: www.proxyvote .com.
How to Request and Receive a PAPER or E-MAIL Copy:
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requesting a copy. Please choose one of the following methods to make your request:
1) BY INTERNET: www.proxyvote.com
2) BY TELEPHONE: 1-800-579-1639
3) BY E-MAIL*: sendmaterial@proxyvote.com
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Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before July 11, 2018 to facilitate timely delivery.
How To Vote
Please Choose One of the Following Voting Methods
Vote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.
Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box
marked by the arrow gXXXX XXXX XXXX XXXX
(located on the following page) available and follow the instructions.
Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.
E49440-P07380-Z72198

Voting Items
The Board of Directors recommends a vote FOR the listed nominees:
1. Election of eight directors for a one-year term.
Nominees:
1a. N. Anthony Coles, M.D.
1b. John H. Hammergren
The Board of Directors recommends a vote FOR the following proposals:
2. Ratification of the appointment of Deloitte & Touche LLP as the company’s independent registered public accounting firm for the fiscal year ending March 31, 2019.
3. Advisory vote on executive compensation.
1c. M. Christine Jacobs
The Board of Directors recommends a vote AGAINST
the following proposals:
1d. Donald R. Knauss
1e. Marie L. Knowles
1f. Bradley E. Lerman
1g. Edward A. Mueller
1h. Susan R. Salka
E49441-P07380-Z72198

E49442-P07380-Z72198