SCHEDULE 13G/A 0001235976 XXXXXXXX LIVE 40 Class A Common Stock, par value $.10 per share 12/31/2024 0000795403 WATTS WATER TECHNOLOGIES INC 942749102 815 CHESTNUT ST North Andover MA 01845 Rule 13d-1(d) Timothy P. Horne a X1 5933290.00 0.00 971600.00 4961690.00 5933290.00 N 17.8 IN Daniel W. Horne a X1 0.00 0.00 0.00 1666970.00 1666970.00 N 5.7 IN Deborah Horne a X1 0.00 0.00 0.00 1666970.00 1666970.00 N 5.7 IN Peter W. Horne a X1 34760.00 0.00 34760.00 1495010.00 1529770.00 N 5.3 IN Walter J. Flowers a X1 0.00 0.00 0.00 1799710.00 1799710.00 N 6.2 IN WATTS WATER TECHNOLOGIES INC 815 Chestnut Street, North Andover, MA, 01845 Timothy P. Horne Daniel W. Horne Deborah Horne Peter W. Horne Walter J. Flowers c/o Watts Water Technologies, Inc. 815 Chestnut Street North Andover, MA 01845 United States Y Timothy P. Horne is deemed the beneficial owner of 5,933,290 shares of Class A Common Stock of the Issuer. As noted below, all of Timothy P. Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer, which is convertible into Class A Common Stock on a share for share basis. Includes (i) 950,000 shares of Class B Common Stock held by a revocable trust for the benefit of Timothy P. Horne, for which Timothy P. Horne serves as sole trustee, (ii) 1,666,970 shares of Class B Common Stock held by a revocable trust for the benefit of Daniel W. Horne, Timothy P. Horne's brother, for which Daniel W. Horne and Walter J. Flowers, a partner in the law firm of Flowers and Manning, LLP, serve as co-trustees, (iii) 1,666,970 shares of Class B Common Stock held by a revocable trust for the benefit of Deborah Horne, Timothy P. Horne's sister, for which Timothy P. Horne serves as sole trustee, which trust is revocable with the consent of the trustee, (iv) 1,495,010 shares of Class B Common Stock held by a revocable trust for the benefit of Peter W. Horne, Timothy P. Horne's brother, for which Peter W. Horne serves as sole trustee, (v) 21,600 shares of Class B Common Stock held for the benefit of Tiffany Horne Noonan (Timothy P. Horne's daughter) under an irrevocable trust for which Timothy P. Horne serves as trustee, (vi) 113,924 shares of Class B Common Stock held by a revocable trust for the benefit of Tiffany Horne Noonan, for which Walter J. Flowers serves as trustee, (vii) 6,447 shares of Class B Common Stock held by a trust for the benefit of Kiera R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, (viii) 6,447 shares of Class B Common Stock held by a trust for the benefit of Tessa R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, and (ix) 5,922 shares of Class B Common Stock held by a trust for the benefit of Liv R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees. The shares of Class B Common Stock (5,933,290 shares of Class B Common Stock in the aggregate) are subject to The Amended and Restated George B. Horne Voting Trust Agreement 1997 ("1997 Voting Trust") for which Timothy P. Horne serves as trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Daniel W. Horne is deemed the beneficial owner of 1,666,970 shares of Class A Common Stock of the Issuer. As noted below, all of Daniel W. Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer which is convertible into Class A Common Stock on a share for share basis. Daniel W. Horne's beneficial ownership consists of 1,666,970 shares of Class B Common Stock held in a revocable trust for which Daniel W. Horne and Walter J. Flowers serve as co-trustees, all of which are subject to the 1997 Voting Trust for which Timothy P. Horne serves as sole trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Deborah Horne is deemed the beneficial owner of 1,666,970 shares of Class A Common Stock of the Issuer. As noted below, all of Deborah Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer, which is convertible into Class A Common Stock on a share for share basis. Deborah Horne's beneficial ownership consists of 1,666,970 shares of Class B Common Stock held in a revocable trust for which Timothy P. Horne serves as the sole trustee, all of which are subject to the 1997 Voting Trust for which Timothy P. Horne serves as sole trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Peter W. Horne is deemed the beneficial owner of 1,529,770 shares of Class A Common Stock of the Issuer. As noted below, substantially all of Peter W. Horne's beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer which is convertible into Class A Common Stock on a share for share basis Peter W. Horne's beneficial ownership consists of (i) 1,515,010 shares of Class B Common Stock held in a revocable trust for which Peter W. Horne serves as the sole trustee, and (ii) 14,760 shares of Class A Common Stock. 1,495,010 shares of Class B Common Stock described in clause (i) above are subject to the 1997 Voting Trust for which Timothy P. Horne serves as trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Walter J. Flowers is deemed the beneficial owner of 1,799,710 shares of Class A Common Stock of the Issuer. As noted below, all of Mr. Flowers' beneficial ownership of Class A Common Stock is derived from beneficial ownership of Class B Common Stock, par value $.10 per share, of the Issuer which is convertible into Class A Common Stock on a share for share basis. Mr. Flowers' beneficial ownership consists of (i) 1,666,970 shares of Class B Common Stock held in a revocable trust for the benefit of Daniel W. Horne for which Daniel W. Horne and Mr. Flowers serve as co-trustees, (ii) 113,924 shares of Class B Common Stock held in a revocable trust for the benefit of Tiffany Horne Noonan for which Mr. Flowers serves as the sole trustee, (iii) 6,447 shares of Class B Common Stock held by a trust for the benefit of Kiera R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, (iv) 6,447 shares of Class B Common Stock held by a trust for the benefit of Tessa R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees, and (v) 5,922 shares of Class B Common Stock held by a trust for the benefit of Liv R. Noonan, for which Joseph T. Noonan and Walter J. Flowers serve as co-trustees. All of the shares of Class B Common Stock (1,799,710 in the aggregate) are subject to the 1997 Voting Trust for which Timothy P. Horne serves as sole trustee. (See Exhibit 2 for a description of the 1997 Voting Trust). Mr. Flowers disclaims beneficial ownership of all such shares. Timothy P. Horne 17.8% equity percentage 68.3% voting percentage Daniel W. Horne 5.7% equity percentage 0.0% voting percentage Deborah Horne 5.7% equity percentage 0.0% voting percentage Peter W. Horne 5.3% equity percentage 0.2% voting percentage Walter J. Flowers 6.2% equity percentage 0.0% voting percentage Timothy P. Horne 5,933,290 Daniel W. Horne 0 Deborah Horne 0 Peter W. Horne 34,760 Walter J. Flowers 0 Timothy P. Horne 0 Daniel W. Horne 0 Deborah Horne 0 Peter W. Horne 0 Walter J. Flowers 0 Timothy P. Horne 971,600 Daniel W. Horne 0 Deborah Horne 0 Peter W. Horne 34,760 Walter J. Flowers 0 Timothy P. Horne 4,961,690 Daniel W. Horne 1,666,970 Deborah Horne 1,666,970 Peter W. Horne 1,495,010 Walter J. Flowers 1,799,710 Y Y Y N A group has filed this Schedule 13G pursuant to Rule 13d-1(d). The members of the group are: Timothy P. Horne Daniel W. Horne Deborah Horne Peter W. Horne Walter J. Flowers Y Y INDEX OF EXHIBITS 1. Amended and Restated Stock Restriction Agreement 2. The Amended and Restated George B. Horne Voting Trust Agreement - 1997 3. Agreement Regarding Joint Filing Timothy P. Horne /s/ Timothy P. Horne 01/29/2025 Daniel W. Horne /s/ Timothy P. Horne* 01/29/2025 Deborah Horne /s/ Timothy P. Horne* 01/29/2025 Peter W. Horne /s/ Timothy P. Horne* 01/29/2025 Walter J. Flowers /s/ Walter J. Flowers 01/29/2025 *By Timothy P. Horne, Attorney in Fact pursuant to Powers of Attorney filed with the Securities and Exchange Commission on February 12, 1992, which Powers of Attorney are hereby incorporated herein by reference.