[Form 4] Avidia Bancorp, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Avidia Bancorp insider transactions: The company's President & CEO reported buying 3,226 shares of common stock at $15.5016 per share and selling 1,000 shares. After the reported purchase, the reporting person beneficially owned 36,793 shares, held indirectly in part through a 401(k) plan. The transactions were reported on Form 4 and reflect direct and indirect ownership changes by a named executive.

Positive

• CEO purchase of 3,226 shares at $15.5016 indicates executive buying activity
• Substantial indirect ownership (36,793 shares) via 401(k) aligns executive interests with shareholders

Negative

• None.

Insights

Securities Analyst

TL;DR: Insider purchased shares at $15.50 and retains significant indirect holdings, a modest signal of executive alignment with shareholders.

The acquisition of 3,226 shares at $15.5016 increases the reporting person's stake to 36,793 shares beneficially owned, largely held indirectly. A concurrent sale of 1,000 shares was reported, but the net increase and substantial indirect holding via a 401(k) suggest continued financial exposure to company performance. For investors, insider purchases can indicate confidence but amount and context matter; this transaction is modest relative to large-scale movements.

Corporate Governance Expert

TL;DR: CEO-level insider activity shows alignment through retirement-plan holdings and a small open-market purchase.

The reporting person is both a director and the President & CEO, and the Form 4 shows ownership changes occurring through direct purchase and an indirect 401(k) holding. Indirect ownership via an employee retirement plan typically aligns executive and employee interests with long-term shareholder outcomes. The isolated sale of 1,000 shares appears limited in scale and is offset by the larger purchase, presenting a governance signal of modest insider confidence without material change to control or ownership structure.

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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)
09/09/2025

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	09/09/2025		P		3,226	A	$15.5016	36,793	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	09/10/2025
	** 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 insider transactions were reported for Avidia Bancorp (AVBC)?

The President & CEO reported a purchase of 3,226 shares at $15.5016 per share and a sale of 1,000 shares.

How many shares does the reporting person beneficially own after the transactions?

Following the reported purchase, the reporting person beneficially owned 36,793 shares, held indirectly in part through a 401(k).

Who is the reporting person on the Form 4 for AVBC?

The reporting person is Robert D. Cozzone, who is identified as a Director and the President & CEO.

What was the purchase price reported on the Form 4?

The reported purchase price was $15.5016 per share.

Does the Form 4 show any derivative transactions?

No derivative securities are reported; the Form 4 lists only non-derivative common stock transactions.