Avidia Bancorp (AVBC) CFO boosts stake with 6,631-share open-market buy

Rhea-AI Filing Summary

Avidia Bancorp, Inc. reported that CFO and Treasurer Nelson Jonathan Michael bought common stock on August 26, 2025. He made an open-market purchase of 6,631 shares at $15.0806 per share through a 401(k) account, bringing his indirect holdings there to 16,554 shares. He also holds 7,000 shares directly.

Insider Trade Summary

Net Buyer: 6,631 shares ($99,999)

Net Buy 2 txns

Insider Nelson Jonathan Michael

Role CFO and Treasurer

Bought 6,631 shs ($100K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	6,631	$15.0806	$100K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 16,554 shares (Indirect, By 401(k)); Common Stock — 7,000 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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^*

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)
08/26/2025

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	08/26/2025		P		6,631	A	$15.0806	16,554	I	By 401(k)
Common Stock								7,000	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	08/27/2025
	** 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 transaction did Avidia Bancorp (AVBC) report for its CFO?

Avidia Bancorp reported an insider share purchase by its CFO. Nelson Jonathan Michael bought 6,631 shares of common stock on August 26, 2025, as an open-market transaction, adding to his existing holdings and signaling increased personal exposure to the company’s equity.

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

The CFO bought 6,631 Avidia Bancorp shares at $15.0806 each. The transaction was an open-market purchase reported on a Form 4, executed on August 26, 2025, and held indirectly through a 401(k) retirement account associated with the executive.

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

After the transaction, the CFO indirectly holds 16,554 shares via a 401(k). The filing also shows 7,000 shares held directly in his own name, indicating both retirement-plan and personal ownership positions in Avidia Bancorp common stock following the reported activity.

What type of transaction did Avidia Bancorp’s (AVBC) CFO execute on August 26, 2025?

The CFO executed an open-market purchase of common stock. The Form 4 lists transaction code “P” for a purchase, describing it as an open-market or private transaction, and classifies the acquired 6,631 shares as indirectly owned through a 401(k) plan.

Is the Avidia Bancorp (AVBC) CFO’s new holding classified as direct or indirect ownership?

The newly purchased 6,631 shares are classified as indirect ownership. They are held “By 401(k),” meaning they reside in a retirement plan account. Separately, the filing discloses 7,000 shares categorized as directly owned by the executive himself.

Who is the Avidia Bancorp (AVBC) insider involved in this Form 4 filing?

The insider is Nelson Jonathan Michael, CFO and Treasurer. The filing identifies him as an officer of Avidia Bancorp, not a director or 10% owner, and reports his recent purchase of common stock and resulting direct and indirect shareholdings in the company.