CLBK furnishes Exhibit 99.1 investor presentation under Reg FD

Rhea-AI Filing Summary

Columbia Financial, Inc. (CLBK) announced it will make a slide presentation available to analysts and prospective investors on November 10, 2025. The materials cover the company’s operating and growth strategies and financial performance and will be posted on the company’s website the same day.

In connection with this Regulation FD disclosure, the presentation is furnished as Exhibit 99.1. The filing lists the exhibit and confirms public availability to ensure broad, simultaneous access to the information.

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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): November 10, 2025

Columbia Financial, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware			001-38456			22-3504946
(State or other jurisdiction			(Commission			(IRS Employer
of incorporation)			File Number)			Identification Number)

19-01 Route 208 North, Fair Lawn, New Jersey 07410

(Address of principal executive offices)

(800) 522-4167

(Registrant’s telephone number, including area code)

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 symbol(s)			Name of each exchange on which registered
Common stock, $0.01 par value per share			CLBK			The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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 7.01 Regulation FD Disclosure

    On November 10, 2025, Columbia Financial, Inc. (the "Company"), the holding company for Columbia Bank and its subsidiaries, will make available and distribute to analysts and prospective investors a slide presentation. The presentation materials include information regarding the Company’s operating and growth strategies and financial performance. The presentation materials will also be posted to the Company’s website on November 10, 2025. Pursuant to Regulation FD, the presentation materials are attached hereto as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits

        (d) Exhibits

Exhibit Number						Description
99.1						Presentation Materials
104						Cover Page Interactive Data File (embedded within the Inline XBRL document)

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SIGNATURE

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

Date:

November 10, 2025

/s/Dennis E. Gibney

Dennis E. Gibney

Senior Executive Vice President and Chief Financial Officer

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FAQ

What did Columbia Financial (CLBK) disclose in this 8-K?

The company will distribute a slide presentation to analysts and prospective investors and post it on its website on November 10, 2025.

What is included as an exhibit in the filing?

The presentation materials are furnished as Exhibit 99.1.

Why is this information being disclosed?

It is a Regulation FD disclosure to provide broad, simultaneous access to the presentation materials.

Where can investors access the materials?

The slide presentation will be posted on the company’s website on November 10, 2025.

What topics do the materials cover?

They include information on operating and growth strategies and financial performance.

What is Columbia Financial’s trading symbol and exchange?

The common stock trades as CLBK on The Nasdaq Stock Market LLC.