# EDGAR Filing Document

**Accession Number:** 0002058758
**File Stem:** 0001193125-25-156496
**Filing Date:** 2025-7
**Character Count:** 7723
**Document Hash:** 840766c8e1e2e3eb9183ac9e611292b8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-156496.hdr.sgml**: 20250708

**ACCESSION NUMBER**: 0001193125-25-156496

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20250708

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250708

**DATE AS OF CHANGE**: 20250708

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Avidia Bancorp, Inc.
- **CENTRAL INDEX KEY:** 0002058758
- **STANDARD INDUSTRIAL CLASSIFICATION:** SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED [6036]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MD
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 333-285815
- **FILM NUMBER:** 251109931

**BUSINESS ADDRESS:**
- **STREET 1:** 42 MAIN STREET
- **CITY:** HUDSON
- **STATE:** MA
- **ZIP:** 01749
- **BUSINESS PHONE:** 800-508-2265

**MAIL ADDRESS:**
- **STREET 1:** 42 MAIN STREET
- **CITY:** HUDSON
- **STATE:** MA
- **ZIP:** 01749

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported): July 8, 2025

## Avidia Bancorp, Inc.

#### (Exact Name of Registrant as Specified in its Charter)

---

| | | |
|:---|:---|:---|
| **Maryland** | **333-285815** | **33-4239888** |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission**<br> **File No.)** | **(I.R.S. Employer<br>Identification No.)** |

---

---

| | |
|:---|:---|
| **42 Main Street, Hudson, Massachusetts** | **01749** |
| **(Address of Principal Executive Offices)** | **(Zip Code)** |

---

(800) 508-2265

#### (Registrant's telephone number, including area code)

#### Not Applicable

#### (Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of Each Class** | **Trading<br>Symbol(s)** | **Name of Each Exchange**<br> **on Which Registered** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 8.01** | **Other Events.**  |

---

On July 8, 2025, Avidia Bancorp, Inc., the proposed holding company of Avidia Bank, issued a press release to announce the results of the subscription offering conducted in connection with the mutual-to-stock conversion of Assabet Valley Bancorp, the mutual holding company of Avidia Bank. A copy of the press release is filed as an exhibit hereto and is incorporated herein by reference.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.**  |

---

(d) Exhibits

---

| | |
|:---|:---|
| Exhibit<br>No. | Description |
| 99.1 | [Press Release dated July 8, 2025](d70568dex991.htm) |
| 104 | Cover Page Interactive Data File (Embedded within Inline XBRL document) |

---

------

#### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **Avidia Bancorp, Inc.** | **Avidia Bancorp, Inc.** |
| Date: July 8, 2025 | By: | /s/ Robert D. Cozzone |
|  |  | Robert D. Cozzone |
|  |  | President and Chief Executive Officer |

---

## Exhibit 99.1

**Exhibit 99.1** 

<u>PRESS RELEASE</u> 

<u>Contact</u>:

Robert D. Cozzone

President and Chief Executive Officer

Avidia Bancorp, Inc.

(800) 508-2265

**Avidia Bancorp, Inc. Announces Subscription Offering Results** 

Hudson, MA; July 8, 2025 – Avidia Bancorp, Inc. (the "Company"), the proposed holding company of Avidia Bank, announced today the results of the subscription offering conducted in connection with the mutual-to-stock conversion of Assabet Valley Bancorp, the mutual holding company of Avidia Bank.

The subscription offering, which expired on June 17, 2025, was oversubscribed in the first tier by eligible depositors of Avidia Bank as of the close of business on December 31, 2023. Valid subscription orders for more than the $191,762,500 adjusted maximum of the offering range were received. As a result of the oversubscription, the subscription orders are subject to the priorities and allocation procedures disclosed in the Company's Prospectus dated May 13, 2025. Once final allocation information is available, subscribers will be able to confirm their allocations by calling the Stock Information Center at (877) 821-5783 (toll-free) or by visiting *https://allocations.kbw.com*. The Company intends to issue a press release once final allocation information is available.

The closing of the conversion and stock offering is still subject to the receipt of final regulatory approval and satisfaction of other customary closing conditions. The Company's common stock is expected to trade on the New York Stock Exchange under the trading symbol "AVBC".

Luse Gorman, PC is acting as legal counsel to the Company, Assabet Valley Bancorp and Avidia Bank. Keefe, Bruyette & Woods, Inc., a Stifel Company, acted as marketing agent for the Company in the subscription offering, and Nutter McClennen & Fish LLP is acting as its legal counsel.

**About Avidia Bank** 

Avidia Bank is a Massachusetts-chartered stock savings bank. With headquarters in Hudson, Massachusetts, it also operates nine full-service banking offices in western Middlesex County and eastern Worcester County, in Massachusetts.

------

**Forward-Looking Statements** 

This press release contains certain forward-looking statements about the conversion and stock offering. Forward-looking statements include statements regarding anticipated future events and can be identified by the fact that they do not relate strictly to historical or current facts. They often include words such as "believe," "expect," "anticipate," "estimate," and "intend" or future or conditional verbs such as "will," "would," "should," "could," or "may." Forward-looking statements, by their nature, are subject to risks and uncertainties. Certain factors that could cause actual results to differ materially from expected results include, but are not limited to, delay or failure to receive final regulatory approvals and delay in closing the conversion and stock offering.

**Legal Disclosure** 

**The shares of common stock of Avidia Bancorp, Inc. are not deposit accounts or savings accounts and are not insured by the Federal Deposit Insurance Corporation, the Depositors Insurance Fund or any other government agency.** 

# # #