COSTCO WHSL CORP NEW

Ticker: COST CUSIP: 22160K105 Class: COM

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

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

Q4 2014

Shares 203,550 Value ($000) $28,853 Avg Close $109.42 Range $98.12 - $118.34

Q3 2014

Shares 357,450 Value ($000) $44,796 Avg Close $97.13 Range $92.09 - $102.72

Q2 2014

Shares 457,450 Value ($000) $52,680 Avg Close $91.81 Range $88.18 - $95.25

Q1 2014

Shares 933,150 Value ($000) $104,214 Avg Close $91.29 Range $87.26 - $95.07

Q4 2013

Shares 1,437,250 Value ($000) $171,061 Avg Close $95.15 Range $87.55 - $100.50

Q3 2013

Shares 1,437,250 Value ($000) $165,528 Avg Close $91.64 Range $87.25 - $95.29

Q2 2013

Shares 1,436,250 Value ($000) $158,806 Avg Close $86.56 Range $81.59 - $91.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	203,550	$28,853	$109.42	$98.12 - $118.34
Q3 2014	357,450	$44,796	$97.13	$92.09 - $102.72
Q2 2014	457,450	$52,680	$91.81	$88.18 - $95.25
Q1 2014	933,150	$104,214	$91.29	$87.26 - $95.07
Q4 2013	1,437,250	$171,061	$95.15	$87.55 - $100.50
Q3 2013	1,437,250	$165,528	$91.64	$87.25 - $95.29
Q2 2013	1,436,250	$158,806	$86.56	$81.59 - $91.78