X0306 4 2018-07-26 0000795403 WATTS WATER TECHNOLOGIES INC WTS 0001290041 Lepage Kenneth Robert 815 CHESTNUT STREET NORTH ANDOVER MA 01845 1 General Counsel Class A Common Stock 2018-07-26 4 M 0 6201.0000 57.4700 A 56959.0000 D Class A Common Stock 2018-07-26 4 S 0 6201.0000 85.0000 D 50758.0000 D Class A Common Stock 2018-07-27 4 F 0 677.0000 83.7500 D 50081.0000 D Stock Option (right to buy) 57.4700 2018-07-26 4 M 0 6201.0000 0.0000 D 2015-08-01 2024-08-01 Class A Common Stock 6201.0000 0.0000 D The sale of 6,201 shares of Class A Common Stock reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2018. 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 July 27, 2015. 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. The stock option vests in three equal annual installments beginning on the date set forth above. /s/ Amy B. Clark, Attorney-in-Fact 2018-07-30