X0508 4 2026-02-19 0000795403 WATTS WATER TECHNOLOGIES INC WTS 0001299653 Pagano Robert J Jr 815 CHESTNUT STREET NORTH ANDOVER MA 01845 1 President and CEO 0 Class A Common Stock 2026-02-19 4 S 0 78.0000 330.2600 D 207190.0000 D Class A Common Stock 2026-02-19 4 S 0 81.0000 329.6200 D 207109.0000 D Class A Common Stock 2026-02-19 4 S 0 1994.0000 328.5500 D 205115.0000 D Class A Common Stock 2026-02-19 4 S 0 2834.0000 325.7500 D 202281.0000 D Class A Common Stock 2026-02-19 4 S 0 3348.0000 326.8900 D 198933.0000 D Class A Common Stock 2026-02-19 4 S 0 7731.0000 327.6800 D 191202.0000 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.20 to $329.97, 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) through (5) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.20 to $329.18, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.14 to $326.12, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.21 to $327.20, inclusive. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.20 to $328.18, inclusive. /s/ Seth M. Kipp, Attorney-in-Fact 2026-02-20