Avidia Bancorp, Inc.

Submission of Matters to a Vote of Security Holders

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Submission of Matters to a Vote of Security Holders

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Other Events

Results of Operations and Financial Condition

Annual reports of employee stock purchase savings and similar plans pursuant to Section 15(d)

Other Events

Regulation FD Disclosure

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

General form for quarterly reports under Section 13 or 15(d)

Changes in Registrant's Certifying Accountant

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Other Events

Certification of approval for listing and registration on a national securities exchange

Registration of Securities on Exchange

Other Events

Other Events

General form for quarterly reports under Section 13 or 15(d)

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Other Events

Notice of Effectiveness

Correspondence with the SEC

Correspondence with the SEC

Correspondence with the SEC

Amended Initial Registration Statement

Letter from the SEC

Correspondence with the SEC

Amended Initial Registration Statement

Letter from the SEC

Registration (IPO) statement under Securities Act of 1933

Leland Jeffrey B

Murphy Michael Dennis

Saul Kennedy O

O'Connell Mark

GILLES MICHAEL O

Blazar Paul

Candela Vanessa

Flanigan Micheal Neil

Gallagher Carol V

Girard Michael R

Grimaldo Joseph F

BALL JAMES N

Murphy Michael Dennis

Nelson Jonathan Michael

Grimaldo Joseph F

Doane Thomas

Saul Kennedy O

Grimaldo Joseph F

Karmelek Nicolas

GILLES MICHAEL O