Avidia Bancorp (AVBC) risk chief buys 1,090 shares in open market

Rhea-AI Filing Summary

Avidia Bancorp, Inc. executive Nicolas Karmelek, EVP and Chief Risk Officer, bought 1,090 shares of common stock in an open-market purchase at $18.59 per share. After this transaction, he directly owned 6,485 shares and also indirectly held 21,137 shares through a 401(k) plan.

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

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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^*

Karmelek Nicolas

(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)
	EVP and CRO

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

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	03/02/2026		P		1,090	A	$18.59	6,485	D
Common Stock								21,137	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	03/03/2026
	** 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 AVBC executive Nicolas Karmelek report on this Form 4?

Nicolas Karmelek reported buying 1,090 shares of Avidia Bancorp common stock. The shares were acquired in an open-market purchase at a price of $18.59 per share on March 2, 2026.

What is the total direct share ownership of AVBC EVP and CRO Nicolas Karmelek after this transaction?

After the reported transaction, Nicolas Karmelek directly owned 6,485 shares of Avidia Bancorp common stock. This figure reflects his direct holdings immediately following the 1,090-share open-market purchase disclosed.

Does the AVBC Form 4 show any indirect holdings for Nicolas Karmelek?

Yes. In addition to his direct holdings, the Form 4 shows that 21,137 shares of Avidia Bancorp common stock are held indirectly for Nicolas Karmelek through a 401(k) plan as of the reported date.

Were there any stock sales reported by AVBC executive Nicolas Karmelek on this Form 4?

No stock sales were reported. The Form 4 shows one open-market purchase of 1,090 shares and an additional line updating indirect holdings in a 401(k), with no indicated dispositions of Avidia Bancorp shares.

What was the purchase price per share in the AVBC insider transaction by Nicolas Karmelek?

The reported purchase price was $18.59 per share. This price applied to the 1,090 shares of Avidia Bancorp common stock bought in the open market on March 2, 2026 by Nicolas Karmelek.