Avidia Bancorp grants Karmelek 32K shares, 80K options

The options have a $21.95 exercise price and expire on October 13, 2036.

Rhea-AI Filing Summary

Avidia Bancorp, Inc. EVP and CRO Nicolas Karmelek received awards of 32,000 shares of restricted stock and 80,000 stock options on October 13, 2026. His direct common-stock holdings following the restricted-stock award were 39,727 shares. The reported indirect holdings included 22,316 shares through a 401(k) and 1,096 shares through an ESOP.

The restricted stock and options vest at a rate of 20% per year beginning October 13, 2027.

Insider Trade Summary

Grant/Award: 112,000 shares

Grant/Award 4 txns

Insider Karmelek Nicolas

Role EVP and CRO

Type	Security	Shares	Price	Value
Grant/Award	Stock Options F3	80,000	$0.00	$0.00
Grant/Award	Common Stock F1	32,000	$0.00	$0.00
holding	Common Stock F2	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Options — 80,000 contracts (Direct); Common Stock — 39,727 shares (Direct); Common Stock — 22,316 shares (Indirect, By 401(k)); Common Stock — 1,096 shares (Indirect, By ESOP)

Footnotes (3)

1. F1. Shares of restricted stock vest at a rate of 20% per year commencing on October 13, 2027.
2. F2. Reflects transactions not required to be reported pursuant to Section 16 of the Securities Act of 1934, as amended.
3. F3. Stock options vest at a rate of 20% per year commencing on October 13, 2027.

Key Figures

Restricted stock award: 32,000 shares Stock options awarded: 80,000 options Direct common shares held: 39,727 shares +4 more

7 metrics

Restricted stock award 32,000 shares Awarded October 13, 2026

Stock options awarded 80,000 options Awarded October 13, 2026

Direct common shares held 39,727 shares Following the October 13, 2026 restricted-stock award

401(k) common shares 22,316 shares Indirect holdings listed

ESOP common shares 1,096 shares Indirect holdings listed

Annual vesting rate 20% per year Beginning October 13, 2027, for the restricted stock and options

Option exercise price $21.95 per share Stock options awarded October 13, 2026

Key Terms

restricted stock, stock options, ESOP

3 terms

restricted stock financial

"Shares of restricted stock vest at a rate of 20% per year"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

stock options financial

"Stock options vest at a rate of 20% per year"

Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.

ESOP financial

"By ESOP"

An Employee Stock Ownership Plan (ESOP) is a program that gives employees ownership shares in their company, often as part of their benefits package. It acts like a company-sponsored savings plan, allowing workers to have a stake in the company's success, which can boost motivation and loyalty. For investors, ESOPs can influence company decisions and stock value, making them an important aspect of corporate ownership and governance.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many AVBC shares and options did Nicolas Karmelek receive?

Nicolas Karmelek received awards of 32,000 shares of restricted stock and 80,000 stock options on October 13, 2026. Both awards vest at a rate of 20% per year beginning October 13, 2027.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/15/2026 - 10:06 AM EDT Accepted by SEC EDGAR 10/15/2026 - 10:06 AM EDT Learn about SEC filing dates

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^*

Karmelek Nicolas

(Last) (First) (Middle)

42 MAIN ST

(Street)

HUDSON MASSACHUSETTS 01749

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	10/13/2026		A		32,000(1)	A	$0	39,727	D
Common Stock								22,316(2)	I	By 401(k)
Common Stock								1,096	I	By ESOP

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
Stock Options	$21.95	10/13/2026		A		80,000(3)		10/13/2027	10/13/2036	Common Stock	80,000(3)	$0	80,000(3)	D

Explanation of Responses:

1. Shares of restricted stock vest at a rate of 20% per year commencing on October 13, 2027.

2. Reflects transactions not required to be reported pursuant to Section 16 of the Securities Act of 1934, as amended.

3. Stock options vest at a rate of 20% per year commencing on October 13, 2027.

	/s/ Victor L. Cangelosi, pursuant to Power of Attorney	10/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)