Avidia Bancorp (AVBC) EVP Murphy buys 1,500 shares in open market

Rhea-AI Filing Summary

Avidia Bancorp, Inc. executive Bartholomew H. Murphy Jr., EVP & Chief Operating Officer, bought 1,500 shares of common stock in an open-market purchase on 2026-03-09 at an average price of $19.0899 per share. After this trade, he directly owns 21,500 shares. Separate from this, filings show indirect holdings of 20,000 shares in an IRA, 6,000 shares held by his spouse, and 10,000 shares in his spouse’s IRA.

Insider Trade Summary

Net Buyer: 1,500 shares ($28,635)

Net Buy 4 txns

Insider Murphy Bartholomew H JR

Role EVP & Chief Operating Off

Bought 1,500 shs ($29K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	1,500	$19.0899	$29K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 21,500 shares (Direct); Common Stock — 20,000 shares (Indirect, By IRA)

Footnotes (1)

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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^*

Murphy Bartholomew H JR

(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 & Chief Operating Off

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

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	03/09/2026		P		1,500	A	$19.0899	21,500	D
Common Stock								20,000	I	By IRA
Common Stock								6,000	I	By Spouse
Common Stock								10,000	I	By Spouse's IRA

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	03/11/2026
	** 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 Bartholomew Murphy report?

Bartholomew H. Murphy Jr. reported buying 1,500 shares of Avidia Bancorp common stock in an open-market transaction. The purchase occurred at an average price of $19.0899 per share on 2026-03-09, increasing his directly held position to 21,500 shares.

What is Bartholomew Murphy’s direct AVBC shareholding after this Form 4?

After the reported transaction, Bartholomew H. Murphy Jr. directly owns 21,500 Avidia Bancorp common shares. This reflects the addition of 1,500 shares purchased on 2026-03-09 at an average price of $19.0899 per share in an open-market trade.

Were there any AVBC insider stock sales in this Form 4 filing?

This Form 4 for Avidia Bancorp shows only a net buy by Bartholomew H. Murphy Jr. It reports an open-market purchase of 1,500 common shares and no corresponding sales transactions or derivative exercises in the data provided for this filing.

What indirect AVBC shareholdings are associated with Bartholomew Murphy?

In addition to 21,500 shares held directly, the filing lists indirect Avidia Bancorp holdings: 20,000 shares in an IRA, 6,000 shares held by his spouse, and 10,000 shares in his spouse’s IRA, all as of the 2026-03-09 reporting date.

What role does Bartholomew Murphy hold at Avidia Bancorp (AVBC)?

Bartholomew H. Murphy Jr. is identified as an officer of Avidia Bancorp, serving as EVP & Chief Operating Officer. His Form 4 filing reflects an open-market purchase of common stock, increasing his directly held share position at the company.

How many AVBC shares did Bartholomew Murphy buy and at what price?

Bartholomew H. Murphy Jr. bought 1,500 Avidia Bancorp common shares. The transaction was an open-market purchase executed at an average price of $19.0899 per share on 2026-03-09, according to the Form 4 transaction details.