MCKESSON CORP

Ticker: MCK CUSIP: 58155Q103 Class: COM

Twin Securities, Inc.'s Holding History (CIK: 0001351351)

Note: Option positions (PUT/CALL) are excluded.

Q2 2014

Shares 119,455 Value ($000) $22,243 Avg Close $163.23 Range $149.40 - $176.12

Q1 2014

Shares 385,623 Value ($000) $68,089 Avg Close $160.13 Range $146.04 - $172.44

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2014	119,455	$22,243	$163.23	$149.40 - $176.12
Q1 2014	385,623	$68,089	$160.13	$146.04 - $172.44