Avidia Bancorp (AVBC) CEO adds 1,064 shares in open-market 401(k) buy

Rhea-AI Filing Summary

Avidia Bancorp, Inc. President & CEO Robert D. Cozzone reported an indirect open-market purchase of 1,064 shares of common stock at $18.79 per share through a 401(k) account. Following this transaction, his indirectly held balance through the 401(k) is 63,206 shares, in addition to 1,000 shares held directly.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Cozzone Robert D

(Last) (First) (Middle)

42 MAIN ST

(Street)

HUDSON MA 01749

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Avidia Bancorp, Inc. [ AVBC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/02/2026		P		1,064	A	$18.79	63,206	I	By 401(k)
Common Stock								1,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Victor L. Cangelosi, pursuant to power of attorney	03/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Avidia Bancorp (AVBC) CEO Robert Cozzone report on this Form 4?

Robert D. Cozzone reported an indirect open-market purchase of 1,064 Avidia Bancorp common shares at $18.79 per share through a 401(k) account. The filing also updates his directly and indirectly held post-transaction share balances.

How many Avidia Bancorp (AVBC) shares did the CEO buy and at what price?

The CEO bought 1,064 shares of Avidia Bancorp common stock at $18.79 per share in an open-market transaction. This purchase was reported as being held indirectly through a 401(k) retirement plan account.

How many Avidia Bancorp (AVBC) shares does the CEO hold after the reported transaction?

After the transaction, Robert D. Cozzone holds 63,206 Avidia Bancorp shares indirectly through a 401(k) account and 1,000 shares directly. The Form 4 distinguishes between indirect retirement-plan holdings and shares owned directly in his name.

Is the Avidia Bancorp (AVBC) CEO’s new position held directly or indirectly?

Most of the CEO’s reported holdings are indirect, with 63,206 shares held through a 401(k) account. He also has 1,000 Avidia Bancorp shares held directly, according to the post-transaction ownership details in the Form 4 filing.

What type of transaction did the Avidia Bancorp (AVBC) Form 4 disclose?

The Form 4 discloses an open-market purchase of common stock, classified under code P. The transaction reflects a 1,064-share buy at $18.79 per share, reported as an indirect holding via a 401(k) retirement plan.