wash-20260720 0000737468 FALSE 0000737468 2026-07-20 2026-07-20 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 20, 2026 WASHINGTON TRUST BANCORP, INC. (Exact Name of Registrant as Specified in Charter) Rhode Island 001-32991 05-0404671 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.) 23 Broad Street Westerly, Rhode Island 02891 (Address of principal executive offices) (Zip Code) (401) 348-1200 (Registrant's telephone number, including area code) N/A (Former name or address, if changed from last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered COMMON STOCK, $.0625 PAR VALUE PER SHARE WASH Nasdaq Global Select Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). 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. ☐ Item 2.02 Results of Operations and Financial Condition. On July 20, 2026, Washington Trust Bancorp, Inc. issued a press release in which it disclosed unaudited financial information related to second quarter 2026 consolidated earnings.  A copy of the press release relating to such announcement, dated July 20, 2026, is attached hereto as Exhibit 99.1 and is incorporated herein by reference. Pursuant to General Instructions B.2 of Form 8-K, this information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Exhibit 99.1 Press release dated July 20, 2026* 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) *Furnished herewith SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. WASHINGTON TRUST BANCORP, INC. Date: July 20, 2026 By: /s/ Ronald S. Ohsberg Ronald S. Ohsberg Senior Executive Vice President, Chief Financial Officer and Treasurer

Washington Trust Bancorp, Inc. released unaudited financial results for Q2 2026 on July 20, 2026, providing investors with key earnings figures and performance metrics to assess the bank's operational health.

On July 20, 2026, Washington Trust Bancorp, Inc. disclosed its unaudited financial results for the second quarter of 2026. The press release highlights key earnings figures and financial performance metrics, which are critical for stakeholders assessing the bank's operational health. This information was issued to provide investors with timely updates regarding the company's financial status. The filing indicates that the results are not to be considered 'filed' under the Exchange Act, suggesting careful legal consideration in the communication of these results.

WASHINGTON TRUST BANCORP, INC.

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