VALERO ENERGY CORP

Ticker: VLO CUSIP: 91913Y100 Class: COM

VIKING GLOBAL INVESTORS LP's Holding History (CIK: 0001103804)

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

Q2 2014

Shares 4,218,837 Value ($000) $211,364 Avg Close $35.48 Range $32.27 - $38.33

Q1 2014

Shares 12,131,872 Value ($000) $644,202 Avg Close $32.81 Range $29.32 - $35.94

Q4 2013

Shares 15,931,989 Value ($000) $802,972 Avg Close $26.85 Range $21.10 - $32.29

Q3 2013

Shares 8,263,954 Value ($000) $282,214 Avg Close $22.41 Range $20.85 - $23.70

Q2 2013

Shares 14,000,572 Value ($000) $486,799 Avg Close $24.01 Range $21.02 - $26.98

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2014	4,218,837	$211,364	$35.48	$32.27 - $38.33
Q1 2014	12,131,872	$644,202	$32.81	$29.32 - $35.94
Q4 2013	15,931,989	$802,972	$26.85	$21.10 - $32.29
Q3 2013	8,263,954	$282,214	$22.41	$20.85 - $23.70
Q2 2013	14,000,572	$486,799	$24.01	$21.02 - $26.98