Avidia Bancorp (AVBC): ESOP holds 8% via 1,606,100 shares

Rhea-AI Filing Summary

Avidia Bank Employee Stock Ownership Plan Trust filed a Schedule 13G reporting beneficial ownership of 1,606,100 shares (8%) of Avidia Bancorp, Inc. common stock as of 09/30/2025.

The plan holds sole voting power and sole dispositive power over 1,606,100 shares. The certification states the securities were acquired and are held in the ordinary course and not for the purpose of changing or influencing control.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Avidia Bancorp, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

05369T100

(CUSIP Number)

09/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 05369T100

1

Names of Reporting Persons

Avidia Bank Employee Stock Ownership Plan Trust

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MASSACHUSETTS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,606,100.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,606,100.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,606,100.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8 %

12

Type of Reporting Person (See Instructions)

EP

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Avidia Bancorp, Inc.
(b)	Address of issuer's principal executive offices: 42 Main Street, Hudson, Massachusetts, 01749
Item 2.
(a)	Name of person filing: Avidia Bank Employee Stock Ownership Plan Trust, Trustee: Delaware Charter Guarantee & Trust Company dba Principal Trust Company
(b)	Address or principal business office or, if none, residence: 1013 Centre Road, Suite 300, Wilmington, Delaware 19805
(c)	Citizenship: Massachusetts
(d)	Title of class of securities: Common Stock, par value $0.01 per share
(e)	CUSIP No.: 05369T100
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 1,606,100
(b)	Percent of class: 8.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,606,100
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,606,100
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. The reporting person is an employee benefit plan subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended.
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Avidia Bank Employee Stock Ownership Plan Trust

Signature:	/s/ Jared Gillespie
Name/Title:	Jared Gillespie, Vice President, Operations, Delaware Charter Guarantee & Trust Company dba Principal Trust Company, as Trustee
Date:	11/13/2025

FAQ

What did Avidia Bank's ESOP disclose about AVBC?

It filed a Schedule 13G showing beneficial ownership of 1,606,100 shares of AVBC common stock, representing 8% of the class as of 09/30/2025.

How much of Avidia Bancorp (AVBC) does the ESOP own?

The ESOP reported 8% beneficial ownership, totaling 1,606,100 shares.

Does the ESOP have voting control over the AVBC shares?

Yes. It has sole voting power and sole dispositive power over 1,606,100 shares.

Who is the trustee for the ESOP’s AVBC holdings?

The trustee is Delaware Charter Guarantee & Trust Company dba Principal Trust Company.

What is the ESOP’s stated intent regarding control of AVBC?

The filing certifies the shares were acquired and are held in the ordinary course and not to change or influence control.

What is the event date for the AVBC ownership reported?

The date of event is 09/30/2025.