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

Rhea-AI Filing Summary

Avidia Bancorp CFO and Treasurer Jonathan M. Nelson reported an open-market purchase of 3,240 shares of the company's common stock on 09/03/2025 at a price of $15.45 per share. After the transaction he beneficially owns 13,480 shares directly and 16,554 shares indirectly through a 401(k) plan. The Form 4 was signed by an attorney on behalf of the reporting person.

Positive

• Insider purchase of 3,240 shares at $15.45 indicates direct acquisition activity
• Clear disclosure of both direct (13,480 shares) and indirect (16,554 shares via 401(k)) beneficial ownership
• Form properly signed (power of attorney signature present)

Negative

• None.

Insights

Securities Analyst

TL;DR: Insider purchase noted; holdings increased modestly, transaction appears routine.

The filing documents a single non-derivative acquisition of 3,240 common shares at $15.45 on 09/03/2025 by the company's CFO and Treasurer. Post-transaction direct beneficial ownership is 13,480 shares with an additional 16,554 shares held indirectly via a 401(k). From an investor-disclosure perspective this is a standard Section 16 report showing insider buying and existing retirement-plan holdings; no derivative activity or dispositions are reported.

Corporate Governance Expert

TL;DR: Disclosure is clear and compliant; shows insider acquisition and plan-based indirect holdings.

The Form 4 lists a purchase coded as "P" totaling 3,240 shares at $15.45 and clearly states direct and indirect ownership counts. The filing includes a signature executed by power of attorney, which is properly noted. There are no amendments, derivative transactions, or additional explanatory disclosures in the form.

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

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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^*

Nelson Jonathan Michael

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO and Treasurer

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2025

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	09/03/2025		P		3,240	A	$15.45	13,480	D
Common Stock								16,554	I	By 401(k)

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	09/03/2025
	** 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 transaction did AVBC insider Jonathan Nelson report on Form 4?

He reported a non-derivative purchase of 3,240 common shares on 09/03/2025 at $15.45 per share.

How many AVBC shares does Jonathan Nelson beneficially own after the reported trade?

Following the transaction he beneficially owns 13,480 shares directly and 16,554 shares indirectly via a 401(k) plan.

Was any derivative or option activity reported for AVBC in this Form 4?

No. Table II contains no entries; the filing reports only a non-derivative common stock acquisition.

When was the Form 4 transaction dated for AVBC insider activity?

The transaction date reported is 09/03/2025.

Who signed the Form 4 for Jonathan Nelson?

The form was signed by Victor L. Cangelosi pursuant to power of attorney on 09/03/2025.