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): December 11, 2025

FIRST FINANCIAL BANCORP.

(Exact name of registrant as specified in its charter)

Ohio

001-34762

31-1042001

(State or other jurisdiction of
incorporation or organization)

(Commission File Number)

(I.R.S. employer
identification number)

255 East Fifth Street, Suite 900

Cincinnati,

Ohio

45202

(Address of principal executive offices)

(Zip Code)

Registrant's telephone number, including area code: (877) 322-9530

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 (see General Instruction A.2. below):

☐ 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))

Title of each class

Trading symbol

Name of exchange on which registered

Common stock, No par value

FFBC

The NASDAQ Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in 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.

The executive officers of First Financial Bancorp. intend to use the materials filed herewith, in whole or in part, in one or more meetings with investors and analysts. A copy of the investor presentation is attached hereto as Exhibit 99.1.

First Financial Bancorp. does not intend for this Item 7.01 or Exhibit 99.1 to be treated as “filed” for purposes of the Securities Exchange Act of 1934, as amended, or incorporated by reference into its filings under the Securities Act of 1933, as amended.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits:

The following exhibits shall not be deemed to be "filed" for purposes of the Exchange Act:

Exhibit No. Description

99.1 First Financial Bancorp. Investor Presentation

104 Cover Page Interactive Data File (embedded within the 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.

FIRST FINANCIAL BANCORP.


		By: /s/ James M. Anderson
		James M. Anderson
		Executive Vice President and Chief Financial Officer

Date:	December 11, 2025

FIRST FINANCIAL BANCORP /OH/ 8-K