Statement of Changes in Beneficial Ownership (4)

FORM 4

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Schechter Lori A.	2. Issuer Name and Ticker or Trading Symbol MCKESSON CORP [ MCK ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    __X__ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) EVP, Chief Legal Officer & GC
(Last)          (First)          (Middle) 6555 STATE HWY 161	3. Date of Earliest Transaction (MM/DD/YYYY) 6/1/2020
(Street) IRVING, TX 75039 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	6/1/2020		M		5488	A	$144.43	11397	D
Common Stock	6/1/2020		S		5488 (1)	D	$160.00	5909	D
Common Stock								12992.4209 (2)	I	By Trust
Common Stock								182.3354	I	ESPP

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (Right-to-buy)	$144.43	6/1/2020		M			5488	(3)	(3)	Common Stock	5488	$0	10976	D

Explanation of Responses:
(1)	Exercise and sale pursuant to a previously adopted plan dated August 8, 2019 in compliance with Rule 10b5-1.
(2)	Includes 1,507.42 shares acquired in the ESPP held under The Hebert-Schechter Trust dtd 12/28/1999, Lori Ann-Schechter & William Hebert, Trustees.
(3)	This option is scheduled to vest 25% on May 30, 2019, 25% on May 30, 2020, 25% on May 30, 2021 and 25% on May 30, 2022.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Schechter Lori A. 6555 STATE HWY 161 IRVING, TX 75039		X	EVP, Chief Legal Officer & GC

Signatures
Laura Heiman, Attorney-in-fact		6/1/2020
**Signature of Reporting Person		Date