X0306 4 2017-03-21 0000795403 WATTS WATER TECHNOLOGIES INC WTS 0001661822 Halloran Virginia A 815 CHESTNUT STREET NORTH ANDOVER MA 01845 1 Chief Accounting Officer Class A Common Stock 2017-03-21 4 F 0 100.0000 60.4500 D 5565.0000 D Represents the number of shares required to be withheld from the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock awarded to the Reporting Person on March 21, 2016. The withholding of shares to cover tax withholding obligations is mandated by the terms of the Reporting Person's restricted stock award under the Issuer's Second Amended and Restated 2004 Stock Incentive Plan and does not represent a discretionary trade by the Reporting Person. /s/ Amy B. Clark, Attorney-in-Fact 2017-03-22