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Table of Contents 0 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 Or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-11499 WATTS WATER TECHNOLOGIES , INC . ( Exact name of registrant as specified in its charter ) Delaware ( State or Other Jurisdiction of Incorporation or Organization ) 815 Chestnut Street , North Andover , MA ( Address of Principal Executive Offices ) Registrant's telephone number , including area code : ( 978 ) 688-1811 Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Class A common stock , par value $ 0.10 per share Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes > No □ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Exchange Act . Yes No = Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No 04-2916536 ( I.R.S. Employer Identification No. ) Trading Symbol ( s ) WTS Accelerated filer 01845 ( Zip Code ) Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes No Name of each exchange on which registered New York Stock Exchange Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer > Non - accelerated filer Class Class A common stock , $ 0.10 par value per share Class B common stock , $ 0.10 par value per share Smaller reporting company Emerging growth company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No > As of June 26 , 2020 , the aggregate market value of the registrant's common stock held by non - affiliates of the registrant was approximately $ 2,137,251,957 based on the closing sale price as reported on the New York Stock Exchange . Indicate the number of shares outstanding of each of the issuer's classes of common stock , as of the latest practicable date . Outstanding at January 24 , 2021 27,470,911 shares 6,144,290 shares DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's Proxy Statement for its Annual Meeting of Stockholders to be held on May 12 , 2021 are incorporated by reference into Part III of this Annual Report on Form 10 - K .