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

Rhea-AI Filing Summary

Robert D. Cozzone, who is listed as President & CEO and a director of Avidia Bancorp, Inc. (AVBC), reported changes in his beneficial ownership on a Form 4.

The filing shows a reported acquisition of 3,279 shares of Avidia common stock on 09/04/2025 at a reported price of $15.2469 per share, and indicates total beneficial ownership following the reported transaction of 33,567 shares held indirectly (noted "By 401(k)"). The form also lists a separate disposition of 1,000 shares (marked "D") on the report lines; full detail for that disposal line is not provided in the visible text.

Positive

• Insider purchase disclosed: Acquisition of 3,279 shares reported on 09/04/2025 at $15.2469 per share
• Substantial indirect holding: Reporting person retains 33,567 shares held indirectly through a 401(k)
• Timely Form 4 filing: Report executed and signed by power of attorney on 09/05/2025

Negative

• Incomplete disposal detail: A disposition of 1,000 shares is listed but the visible excerpt lacks full transaction date/code/context for that line
• Limited context for materiality: The filing does not include information needed to assess whether these trades materially affect control or investor valuation

Insights

Financial Analyst

TL;DR: Insider reported a small purchase and retains meaningful indirect holdings; transaction size appears routine, not clearly material.

The Form 4 discloses a purchase of 3,279 shares at $15.2469 and an indirect position of 33,567 shares held via a 401(k). For investors, this shows continued insider ownership and a current indirect stake; the filing does not provide evidence of a large change in control or a material shift in position. The separate 1,000-share disposition is shown but lacks contextual detail in the provided text, limiting full assessment.

Corporate Governance Expert

TL;DR: Filing meets reporting requirements for known transactions, but one disposal line lacks clear details in the excerpt.

As both an officer and director, the reporting person’s trades are appropriately disclosed on Form 4. The acquisition and the noted indirect holdings via a 401(k) are consistent with routine insider activity and retirement-account holdings. The document extract includes a disposition of 1,000 shares without full table context, which should be reviewed in the complete filing to confirm dates and codes for compliance clarity.

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)
09/04/2025

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	09/04/2025		P		3,279	A	$15.2469	33,567	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	09/05/2025
	** 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 did Robert D. Cozzone report on the Form 4 for AVBC?

He reported an acquisition of 3,279 shares on 09/04/2025 at $15.2469 and shows 33,567 shares held indirectly via a 401(k); a separate 1,000-share disposition is also listed.

When was the Form 4 for AVBC filed and signed?

The Form 4 reflects transactions dated 09/04/2025 and the signature (by power of attorney) is dated 09/05/2025.

What is the reporting person's role at Avidia Bancorp (AVBC)?

Robert D. Cozzone is reported as President & CEO and a director.

How many shares does the filing show after the reported transaction?

The filing shows 33,567 shares beneficially owned following the reported acquisition, held indirectly.

Is there any missing or unclear information in the provided Form 4 excerpt?

Yes. The disposal of 1,000 shares is shown but the excerpt lacks full table details (date, price, or code) needed for complete interpretation.