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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
927653	Mckesson Corp	MCK	Wholesale-Drugs, Proprietaries & Druggists' Sundries (5122)	943207296

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1197887	H John Hammergren	One Post Street San Francisco CA 94104	Chairman, President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-01-05	300,000	$45.02	300,000	No	4	M	Direct
Common Stock	Disposition	2011-01-05	300,000	$72.01	0	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right-to-buy)	Disposition	2011-01-05	300,000	$0.00	300,000	$45.02

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2006-03-31	2012-07-27	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	538,790	Indirect	By Trust
Common Stock	4,019	Indirect	By Profit-Sharing Investment Plan

Footnotes

Option exercise and sale were pursuant to a previously adopted plan dated 5/11/2010, intended to comply with Rule 10b5-1(c).
Represents 258,549.925 shares held under the Hammergren Family Trust; 59,658 under the JHH 2009 GRAT #4; 59,658 under the WLH 2009 GRAT #4; 13,664 under the JHH 2009 GRAT #5; 13,664 under the WLH 2009 GRAT #5; 13,664 under the JHH 2009 GRAT #6; 13,664 under the WLH 2009 GRAT #6; 13,664 under the JHH 2009 GRAT #7; 13,664 under the WLH 2009 GRAT#7; 13,665 under the JHH 2009 GRAT #8; 13,665 under the WLH 2009 GRAT #8; 12,900 under the JHH 2010 GRAT #3; 12,900 under the WLH 2010 GRAT #3; 12,905 under the JHH 2010 GRAT #4; 12,905 under the WLH GRAT #4.