X0609 4 2026-09-01 0000795403 WATTS WATER TECHNOLOGIES INC WTS 0001573151 Noonan Joseph T false 815 CHESTNUT STREET NORTH ANDOVER MA 01845 1 0 Class A Common Stock 2026-09-01 4 S 0 918.0000 352.6200 D 2732.0000 I By Trust Class A Common Stock 2026-09-01 4 S 0 1266.0000 354.6200 D 1466.0000 I By Trust Class A Common Stock 2026-09-01 4 S 0 1466.0000 353.6300 D 0.0000 I By Trust Class A Common Stock 1650.0000 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $352.22 to $352.85, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnotes (1), (3) and (4) to this Form 4. The shares are held in a trust for the benefit of Tiffany Horne Noonan, the Reporting Person's spouse, who also serves as co-trustee of this trust. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $354.50 to $354.84, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $353.30 to $354.00, inclusive. /s/ Kyle J. Adams, Attorney-in-Fact 2026-09-02