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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , DC 20549 FORM 10 - K ( Mark One ) 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 for the transition period from to Commission file number : 001-32991 WASHINGTON TRUST BANCORP , INC . ( Exact name of registrant as specified in its charter ) Rhode Island ( State or other jurisdiction of incorporation or organization ) 23 Broad Street , Westerly , Rhode Island ( Address of principal executive offices ) ( 401 ) 348-1200 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) WASH Title of each class COMMON STOCK , $ .0625 PAR VALUE PER SHARE 05-0404671 ( I.R.S. Employer Identification No. ) 02891 ( Zip Code ) Large accelerated filer □ Non - accelerated filer Name of each exchange on which registered The NASDAQ Stock Market LLC 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 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 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 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 Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , or a smaller reporting company . See definitions of " large accelerated filer , " " accelerated filer , " and " smaller reporting company " in Rule 12b - 2 of the Exchange Act . Accelerated filer > 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 accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes > No The aggregate market value of voting stock held by non - affiliates of the registrant at June 30 , 2020 was $ 553,933,925 based on a closing sales price of $ 32.75 per share as reported on the NASDAQ Stock Market , which includes $ 22,716,579 held by The Washington Trust Company , of Westerly under trust agreements and other instruments . The number of shares of the registrant's common stock , $ .0625 par value per share , outstanding as of January 31 , 2021 was 17,265,339 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's Proxy Statement dated March 16 , 2021 for the Annual Meeting of Shareholders to be held on April 27 , 2021 are incorporated by reference into Part III of this Form 10 - K .