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

Rhea-AI Filing Summary

Avidia Bancorp CFO Jonathan Nelson reported insider purchases on 08/28/2025. The Form 4 shows two purchases of Common Stock: 500 shares at $15.4699 and 2,740 shares at $15.47. Following those transactions, the filing reports 10,240 shares held directly and 16,554 shares held indirectly via a 401(k). The filing was signed under power of attorney.

Positive

• Insider purchases disclosed: CFO acquired 500 shares at $15.4699 and 2,740 shares at $15.47 on 08/28/2025
• Clear ownership reporting: Filing states 10,240 shares direct and 16,554 shares indirect (401(k)) following reported transactions

Negative

• None.

Insights

Securities Analyst

TL;DR: The company's CFO made multiple purchases totaling 3,240 shares on 08/28/2025, increasing direct and reported ownership.

The filing documents two purchase transactions by Jonathan Nelson, CFO and Treasurer, acquiring 500 shares at $15.4699 and 2,740 shares at $15.47 on 08/28/2025. The report lists 10,240 shares beneficially owned directly after the transactions and 16,554 shares held indirectly through a 401(k). The transactions are coded as purchases and the Form 4 is executed via power of attorney.

Corporate Governance Expert

TL;DR: Insider disclosure is complete for the reported purchases and identifies reporting person roles and ownership form.

The Form 4 identifies the reporting person, roles (CFO and Treasurer, director checkbox marked), transaction dates, prices, and post-transaction beneficial ownership split between direct and indirect holdings. The signature block shows filing by power of attorney dated 08/28/2025. The filing contains no additional explanatory text beyond standard disclosure fields.

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
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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^*

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)
08/28/2025

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	08/28/2025		P		500	A	$15.4699	7,500	D
Common Stock	08/28/2025		P		2,740	A	$15.47	10,240	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	08/28/2025
	** 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 transactions did Jonathan Nelson (AVBC) report on the Form 4?

The Form 4 reports two purchases on 08/28/2025: 500 shares at $15.4699 and 2,740 shares at $15.47.

How many Avidia Bancorp (AVBC) shares does the filing show Jonathan Nelson beneficially owns?

The filing shows 10,240 shares held directly and 16,554 shares held indirectly via a 401(k) following the reported transactions.

What role does the reporting person hold at Avidia Bancorp (AVBC)?

The Form 4 lists the reporting person as a Director and as an Officer with the titles CFO and Treasurer.

What transaction code is used for the reported trades on the Form 4?

Both reported transactions are coded as "P", indicating purchases.

When was the Form 4 signed and by whom?

The signature block shows /s/ Victor L. Cangelosi, pursuant to power of attorney dated 08/28/2025.