GRAINGER W W INC

Ticker: GWW CUSIP: 384802104 Class: COM

Calamos Advisors LLC's Holding History (CIK: 0001316507)

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

Q2 2018

Shares 8,539 Value ($000) $2,633 Avg Close $269.51 Range $243.10 - $291.29

Q1 2018

Shares 16,332 Value ($000) $4,611 Avg Close $235.02 Range $199.84 - $266.88

Q4 2017

Shares 14,963 Value ($000) $3,535 Avg Close $184.63 Range $148.08 - $215.27

Q3 2017

Shares 15,280 Value ($000) $2,747 Avg Close $149.54 Range $137.88 - $164.03

Q2 2017

Shares 14,720 Value ($000) $2,657 Avg Close $166.15 Range $148.81 - $205.76

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	8,539	$2,633	$269.51	$243.10 - $291.29
Q1 2018	16,332	$4,611	$235.02	$199.84 - $266.88
Q4 2017	14,963	$3,535	$184.63	$148.08 - $215.27
Q3 2017	15,280	$2,747	$149.54	$137.88 - $164.03
Q2 2017	14,720	$2,657	$166.15	$148.81 - $205.76