Avidia Bancorp CFO gets 76K shares, 190K options

Both awards vest at 20% per year beginning October 13, 2027; the options have a $21.95 exercise price.

Rhea-AI Filing Summary

Avidia Bancorp, Inc. CFO and Treasurer Jonathan Michael Nelson received 76,000 shares of restricted stock and 190,000 stock options on October 13, 2026. Both awards vest at 20% per year beginning October 13, 2027. The options have a $21.95 exercise price and expire October 13, 2036. After the awards, he directly held 95,045 shares of common stock and 190,000 options; 22,550 common shares were listed as held indirectly through his 401(k).

Insider Trade Summary

Grant/Award: 266,000 shares

Grant/Award 3 txns

Insider Nelson Jonathan Michael

Role CFO and Treasurer

Type	Security	Shares	Price	Value
Grant/Award	Stock Options F3	190,000	$0.00	$0.00
Grant/Award	Common Stock F1	76,000	$0.00	$0.00
holding	Common Stock F2	--	--	--

Holdings After Transaction: Stock Options — 190,000 contracts (Direct); Common Stock — 95,045 shares (Direct); Common Stock — 22,550 shares (Indirect, By 401(k))

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 awarded: 76,000 shares Stock options awarded: 190,000 options Exercise price: $21.95 per share +4 more

7 metrics

Restricted stock awarded 76,000 shares Granted October 13, 2026; vests 20% per year beginning October 13, 2027

Stock options awarded 190,000 options Granted October 13, 2026; vesting begins October 13, 2027

Exercise price $21.95 per share For the 190,000 stock options

Direct common stock held after award 95,045 shares Jonathan Michael Nelson's reported direct holding

Indirect common stock held through 401(k) 22,550 shares Reported as held indirectly

Vesting rate 20% per year Restricted stock and stock options; commencing October 13, 2027

Option expiration date October 13, 2036 For the 190,000 stock options

Key Terms

restricted stock, stock options, 401(k)

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.

401(k) financial

"By 401(k)"

A 401(k) is a type of retirement savings plan offered by employers that allows workers to set aside a portion of their paycheck before taxes are taken out. The money saved in a 401(k) can grow over time through investments, helping individuals build funds for their future retirement. It matters to investors because it provides a tax-advantaged way to save and invest for long-term financial security.

FAQ

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

What awards did AVBC's CFO receive?

Avidia Bancorp CFO and Treasurer Jonathan Michael Nelson received 76,000 shares of restricted stock and 190,000 stock options on October 13, 2026. The options have a $21.95 exercise price.

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 - 10:05 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^*

Nelson Jonathan Michael

(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)
	CFO and Treasurer

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		76,000(1)	A	$0	95,045	D
Common Stock								22,550(2)	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
Stock Options	$21.95	10/13/2026		A		190,000(3)		10/13/2027	10/13/2036	Common Stock	190,000(3)	$0	190,000(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)