
FORM 10-K ☒Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934For the fiscal year ended December 31, 2025 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 No. 001-42775 Avidia Bancorp, Inc.(Exact Name of Registrant as Specified in Its Charter) Maryland33-4239888(State or Other Jurisdiction of Incorporation or Organization)(I.R.S. Employer Identification Number) 01749(Zip Code) (800) 508-2265(Registrant’s Telephone Number, Including Area Code) N/A(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report) Securities registered pursuant to Section 12(b) of the Act: Title of each classTrading symbol(s)Name of Each Exchange on Which RegisteredCommon stock, $0.01 par valueAVBCNew York Stock Exchange 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 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 SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file suchreports), and (2) has been subject to such 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 submittedpursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the Registrant was required tosubmit such files). YES☒NO☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and “emerging growth company” in Rule 12b‑2 of the Exchange Act: Large accelerated filer☐ Accelerated filer☐ Smaller reporting company☒Emerging growth company☒ Non-accelerated filer☒ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying 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 theeffectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) bythe registered public accounting firm that prepared or issued its audit report.☐ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of theregistrant included in the filing reflect the correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-basedcompensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b).☐ 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 the voting and non-voting common equity held by non-affiliates of the Registrant, based on theclosing price of the shares of common stock at the end of the last business day of the most recently completed second fiscal quarteron June 30, 2025, was $-0-. There were 20,076,250 shares of the registrant’s common stock, par value $0.01 per share, outstanding as of March 25, 2026. PART I1ITEM 1.BUSINESS1ITEM 1A.RISK FACTORS32ITEM 1B.UNRESOLVED STAFF COMMENTS32ITEM 1CCYBERSECURITY33ITEM 2.PROPERTIES34ITEM 3.LEGAL PROCEEDINGS34ITEM 4.MINE SAFETY DISCLOSURES34PART II35ITEM 5.MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED SHAREHOLDER MATTERS ANDISSUER PURCHASES OF EQUITY SECURITIES35ITEM 6.[RESERVED]35ITEM 7.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OFOPERATIONS35ITEM 7A.QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK49ITEM 8.FINANCIAL STATEMENT'S AND SUPPLEMENTARY DATA50ITEM 9.CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIALDISCLOSURE50ITEM 9A.CONTROLS AND PROCEDURES50ITEM 9BOTHER INFORMATION50ITEM 9C.DISCLOSURE REGARDING FOREIGN JURISDICTION THAT PREVENT INSPECTIONS50PART III51ITEM 10.DIRECTORS, EXECUTIVE OFFICERS, AND CORPORATE GOVERNANCE51ITEM 11.EXECUTIVE COMPENSATION55ITEM 12.SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT ANDRELATED STOCKHOLDER MATTERS60ITEM 13.CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE62