X0303 4 2010-05-19 0000795403 WATTS WATER TECHNOLOGIES INC WTS 0001235976 HORNE TIMOTHY P 815 CHESTNUT STREET NORTH ANDOVER MA 01845 1 Class A Common Stock 2010-05-19 4 C 0 100000 0 A 110671 D Class B Common Stock 2010-05-19 4 C 0 100000 0 D Class A Common Stock 100000 2004390 D Class B Common Stock Class A Common Stock 5019490 5019490 I By Trust Shares of Class B Common Stock are convertible into shares of Class A Common Stock on a 1-for-1 basis. All shares of Class B Common Stock were convertible into Class A Common Stock upon issuance and do not have an expiration date. Consists of the following shares of Class B Common Stock: (i) 1,666,970 shares held for the benefit of Daniel W. Horne, which are subject to The Amended and Restated George B. Horne Voting Trust Agreement - 1997 (the "1997 Voting Trust") for which the Reporting Person serves as trustee, (ii) 1,666,970 shares held for the benefit of Deborah Horne under a trust for which the Reporting Person serves as trustee, (iii) 1,495,010 shares held for the benefit of Peter W. Horne under a trust, which are subject to the 1997 Voting Trust, (iv) 20,200 and 22,600 shares held for the benefit of Tara V. Horne and Tiffany R. Horne, respectively, under irrevocable trusts for which the Reporting Person serves as trustee, and (v) 147,740 shares held for the benefit of Tiffany R. Horne under a trust, which are subject to the 1997 Voting Trust. /s/ Kenneth R. Lepage, Attorney-in-Fact 2010-05-27