SEC FORM 4

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

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

1. Name and Address of Reporting Person^*

HAMMERGREN JOHN H

(Last)

(First)

(Middle)

ONE POST STREET

(Street)

SAN FRANCISCO

94104

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
MCKESSON CORP [ MCK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chairman, President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
07/07/2010

4. If Amendment, Date of Original Filed (Month/Day/Year)

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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	07/07/2010		M		118,666⁽¹⁾	A	$38.65	118,666	D
Common Stock	07/07/2010		M		106,334⁽¹⁾	A	$28.6	225,000	D
Common Stock	07/07/2010		S		225,000⁽¹⁾	D	$67.5638	0	D
Common Stock	07/08/2010		M		159,500⁽¹⁾	A	$28.6	159,500	D
Common Stock	07/08/2010		S		159,500⁽¹⁾	D	$67.7207	0	D
Common Stock	07/09/2010		M		9,166⁽¹⁾	A	$28.6	9,166	D
Common Stock	07/09/2010		M		106,334⁽¹⁾	A	$32.92	115,500	D
Common Stock	07/09/2010		S		115,500⁽¹⁾	D	$67.4561	0	D
Common Stock								538,789.925⁽²⁾	I	By Trust
Common Stock								3,998.8552	I	By Profit-Sharing Investment Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Employee Stock Option (Right-to-buy)	$38.65	07/07/2010		M			118,666⁽¹⁾	⁽³⁾	07/25/2011	Common Stock	118,666	$0	0	D
Employee Stock Option (Right-to-buy)	$28.6	07/07/2010		M			106,334⁽¹⁾	⁽⁴⁾	01/28/2013	Common Stock	106,334	$0	168,666	D
Employee Stock Option (Right-to-buy)	$28.6	07/08/2010		M			159,500⁽¹⁾	⁽⁴⁾	01/28/2013	Common Stock	159,500	$0	9,166	D
Employee Stock Option (Right-to-buy)	$28.6	07/09/2010		M			9,166⁽¹⁾	⁽⁴⁾	01/28/2013	Common Stock	9,166	$0	0	D
Employee Stock Option (Right-to-buy)	$32.92	07/09/2010		M			106,334⁽¹⁾	⁽⁵⁾	07/30/2012	Common Stock	106,334	$0	168,666	D

Explanation of Responses:

1. Option exercise and sale were pursuant to a previously adopted plan dated 05/11/2010, intended to comply with rule 10b5-1(c),

2. Represents 310,159.925 shares held under the Hammergren Family Trust; 59,658 shares held under the JHH GRAT No. 4; 59,658 shares held under the WLH GRAT No. 4; 13,664 shares held under the JHH GRAT No. 5; 13,664 shares held under the WLH GRAT No. 5; 13,664 shares held under the JHH GRAT No. 6; 13,664 shares held under the WLH GRAT No. 6; 13,664 shares held under the JHH GRAT No. 7; 13,664 shares held under the WLH GRAT No. 7; 13,665 shares held under the JHH GRAT No. 8; 13,665 shares held under the WLH GRAT No. 8

3. This option granted 7/26/2001 vested 25% on the 1st and 2nd grant date anniversary and 50% on 1/27/2004.

4. This option granted 1/29/2003 vested 25% on the 1st grant date anniversary and 75% on 2/20/2004.

5. This option granted 7/31/2002 vested 25% on the 1st grant date anniversary and 75% on 1/27/2004.

Remarks:

	Donna Spinola, Attorney-in-fact	07/09/2010
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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