X0508 4 2024-03-15 0000795403 WATTS WATER TECHNOLOGIES INC WTS 0001882422 Barry Monica 815 CHESTNUT STREET NORTH ANDOVER MA 01845 1 Chief HR Officer 0 Class A Common Stock 2024-03-15 4 A 0 456.0000 163.2300 A 6178.0000 D Class A Common Stock 2024-03-15 4 F 0 189.0000 204.0400 D 5989.0000 D Represents shares subject to restricted stock units purchased by the Reporting Person under the Issuer's Management Stock Purchase Plan at a discount of 20% from the closing sale price of the Issuer's Class A Common Stock on March 15, 2024. The restricted stock units were purchased using a portion of the Reporting Person's pre-tax 2023 performance bonus. The restricted stock units vest in three equal annual installments beginning one year after the date of grant. Represents shares disposed to cover taxes upon the vesting of a deferred stock award granted to the Reporting Person on March 15, 2022. The disposition of shares to cover tax withholding obligations is required by the terms of the Reporting Person's grant agreement and does not represent a discretionary transaction by the Reporting Person. /s/ Seth M. Kipp, Attorney-in-Fact 2024-03-18