Avidia Bancorp grants director 20K shares, 50K options

Avidia Bancorp director received time-vested restricted stock and stock option awards, increasing his direct and trust-held equity position.

Rhea-AI Filing Summary

Avidia Bancorp, Inc. (symbol: AVBC) is the issuer of record for a Form 4 filing submitted to the SEC. Grimaldo Joseph F reported acquisition or exercise transactions in this Form 4 filing.

Avidia Bancorp, Inc. (AVBC) director Joseph F. Grimaldo received equity awards on September 16, 2026. He was granted 20,076 shares of restricted common stock and 50,190 stock options exercisable at $22.29 per share. Both the restricted stock and options vest 20% per year commencing on September 16, 2027. After these awards, he holds 20,076 common shares directly, plus indirect holdings of 49,655 shares by trust and 20,000 shares by his spouse's trust, and 50,190 options.

Insider Trade Summary

Grant/Award: 70,266 shares

Grant/Award 4 txns

Insider Grimaldo Joseph F

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Options F2	50,190	$0.00	$0.00
Grant/Award	Common Stock F1	20,076	$0.00	$0.00
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Options — 50,190 contracts (Direct); Common Stock — 20,076 shares (Direct); Common Stock — 49,655 shares (Indirect, By Trust); Common Stock — 20,000 shares (Indirect, By Spouse's Trust)

Footnotes (2)

1. F1. Shares of restricted stock vest at a rate of 20% per year commencing on September 16, 2027.
2. F2. Stock options vest at a rate of 20% per year commencing on September 16, 2027.

Key Figures

Restricted stock granted: 20,076 shares Stock options granted: 50,190 options Option exercise price: $22.29 per share +5 more

8 metrics

Restricted stock granted 20,076 shares Grant of restricted common stock to director on September 16, 2026

Stock options granted 50,190 options Stock option award to director on September 16, 2026

Option exercise price $22.29 per share Exercise price for 50,190 stock options granted September 16, 2026

Vesting rate 20% per year Applies to both restricted stock and stock options, commencing September 16, 2027

Vesting commencement date September 16, 2027 Start of annual 20% vesting for restricted stock and options

Option expiration date September 16, 2036 Expiration of stock options granted to director

Indirect holdings by trust 49,655 shares Common stock held indirectly "By Trust" after transactions

Indirect holdings by spouse's trust 20,000 shares Common stock held indirectly "By Spouse's Trust" after transactions

Key Terms

restricted stock, stock options, vesting, By Trust, +1 more

5 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.

vesting financial

"vest at a rate of 20% per year commencing on September 16, 2027"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

By Trust financial

"Common Stock holding reported as indirect ownership "By Trust""

By Spouse's Trust financial

"Common Stock holding reported as indirect ownership "By Spouse's Trust""

FAQ

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

What did the Form 4 report for Avidia Bancorp, Inc. (AVBC)?

The Form 4 reports that director Joseph F. Grimaldo received equity compensation on September 16, 2026, consisting of 20,076 shares of restricted common stock and 50,190 stock options, along with updated direct and indirect common stock holdings.

How many restricted Avidia Bancorp (AVBC) shares were granted to the director?

Joseph F. Grimaldo was granted 20,076 shares of restricted common stock of Avidia Bancorp, Inc. These shares vest at a rate of 20% per year commencing on September 16, 2027, according to the filing’s footnote.

What stock options did the Avidia Bancorp (AVBC) director receive?

He received 50,190 stock options on September 16, 2026, each with an exercise price of $22.29 per share. The options vest 20% per year beginning September 16, 2027 and have an expiration date of September 16, 2036.

What are the director’s Avidia Bancorp (AVBC) share holdings after these transactions?

Following the reported awards, he holds 20,076 common shares directly, plus 49,655 shares held indirectly "By Trust" and 20,000 shares held indirectly "By Spouse's Trust", as well as 50,190 stock options tied to common stock.

Is there a Rule 10b5-1 trading plan mentioned in this Avidia Bancorp (AVBC) Form 4?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not affirmed for these transactions, and the footnotes describe only the vesting schedules for the restricted stock and stock options, with no reference to any trading plan.

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

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Available on EDGAR 09/17/2026 - 03:33 PM Accepted by SEC EDGAR 09/17/2026 - 03:33 PM 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^*

Grimaldo Joseph F

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/16/2026

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	09/16/2026		A		20,076(1)	A	$0	20,076	D
Common Stock								49,655	I	By Trust
Common Stock								20,000	I	By Spouse's Trust

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	$22.29	09/16/2026		A		50,190(2)		09/16/2027	09/16/2036	Common Stock	50,190(2)	$0	50,190(2)	D

Explanation of Responses:

1. Shares of restricted stock vest at a rate of 20% per year commencing on September 16, 2027.

2. Stock options vest at a rate of 20% per year commencing on September 16, 2027.

	/s/ Victor L. Cangelosi, pursuant to power of attorney	09/17/2026
	** 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)