WATSCO INC

Ticker: WSO CUSIP: 942622200 Class: Com

Chesley Taft & Associates LLC's Holding History (CIK: 0001164632)

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

Q2 2018

Shares 4,650 Value ($000) $829 Avg Close $181.90 Range $164.19 - $192.94

Q1 2018

Shares 4,650 Value ($000) $842 Avg Close $173.34 Range $160.08 - $183.84

Q4 2017

Shares 4,800 Value ($000) $816 Avg Close $165.20 Range $155.57 - $172.00

Q3 2017

Shares 4,575 Value ($000) $737 Avg Close $151.09 Range $141.61 - $161.86

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	4,650	$829	$181.90	$164.19 - $192.94
Q1 2018	4,650	$842	$173.34	$160.08 - $183.84
Q4 2017	4,800	$816	$165.20	$155.57 - $172.00
Q3 2017	4,575	$737	$151.09	$141.61 - $161.86