MCK McKesson Corporation

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 * Vitalone Britt J.	2. Issuer Name and Ticker or Trading Symbol MCKESSON CORP [ MCK ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) EVP & CFO
(Last)          (First)          (Middle) 6555 STATE HWY 161	3. Date of Earliest Transaction (MM/DD/YYYY) 11/3/2020
(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	11/3/2020		M		8181	A	$0	9229	D
Common Stock	11/3/2020		F		3463 (1)	D	$160.01	5766	D
Common Stock	11/4/2020	11/4/2020	M		6324	A	$144.43	12090	D
Common Stock	11/4/2020		S		6324 (2)	D	$165	5766	D
Common Stock								541.3703	I	By the McKesson Corporation 401(k) Retirement Savings Plan
CommonStock								3.3772	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
Restricted Stock Units (RSUs)	$0	11/3/2020		M			8181	(3)	(3)	Common Stock	8181	$0	0	D
Employee Stock Option (Right-to-buy)	$144.43	11/4/2020		M			6324	(4)	(4)	Common Stock	6324	$0	12648	D

Explanation of Responses:
(1)	This transaction represents a withholding of shares to cover taxes applicable to a vesting of RSUs also reported on this Form 4.
(2)	Sale in accordance with a previously adopted plan dated 6/02/2020 pursuant to Rule 10b5-1(c)
(3)	These RSUs granted on 11/3/2015 vested 100% at five year anniversary of the grant date.
(4)	This option vested 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
Vitalone Britt J. 6555 STATE HWY 161 IRVING, TX 75039			EVP & CFO

Signatures
Laura Heiman, Attorney-in-fact		11/5/2020
**Signature of Reporting Person		Date