# EDGAR Filing Document

**Accession Number:** 0001303942
**File Stem:** 0001437749-26-000629
**Filing Date:** 2026-1
**Character Count:** 5640
**Document Hash:** 0accfa3b8e40d03664bfb58807d2e3de
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-000629.hdr.sgml**: 20260106

**ACCESSION NUMBER**: 0001437749-26-000629

**CONFORMED SUBMISSION TYPE**: POS AM

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260106

**DATE AS OF CHANGE**: 20260106

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BankFinancial CORP
- **CENTRAL INDEX KEY:** 0001303942
- **STANDARD INDUSTRIAL CLASSIFICATION:** SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** POS AM
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-135887
- **FILM NUMBER:** 26512093

**BUSINESS ADDRESS:**
- **STREET 1:** 60 NORTH FRONTAGE ROAD
- **CITY:** BURR RIDGE
- **STATE:** IL
- **ZIP:** 60527
- **BUSINESS PHONE:** (800) 894-6900

**MAIL ADDRESS:**
- **STREET 1:** 60 NORTH FRONTAGE ROAD
- **CITY:** BURR RIDGE
- **STATE:** IL
- **ZIP:** 60527

**As filed with the Securities and Exchange Commission on January 6, 2026**

**Registration No. 333-135887** 

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

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**FORM S-3**

**POST EFFECTIVE AMENDMENT NO. 1 TO**

**Form S-3 Registration Statement No. 333-135887**

***UNDER***

***THE SECURITIES ACT OF 1933***

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**BANKFINANCIAL CORPORATION**

(Exact name of Registrant as specified in its charter)

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| | |
|:---|:---|
| **Maryland**  | **75-3199276** |
| (State or other jurisdiction of incorporation) | (I.R.S. Employer Identification Number) |

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**60 North Frontage Road**

**Burr Ridge, Illinois 60527**

(Address of principal executive offices, including zip code)

**(800) 894-6900**

(Registrant's telephone number, including area code)

**BankFinancial and Subsidiaries Associate Investment Plan**

(Full Title of Plan)

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**Karen B. Woods, Esq.**

**General Counsel and Chief Administrative Officer**

**First Financial Bancorp.**

**255 East Fifth Street, Suite 2900**

**Cincinnati, Ohio 45202**

**(877) 322-9530**

(Telephone number, including area code, of agent for service)

With copies of all communications to:

**Alison N. LaBruyere**

**Squire Patton Boggs (US) LLP**<br> **1230 Peachtree Street N.E.**<br> **Suite 2200**<br> **Atlanta, Georgia 30309**<br> **(678) 272-3200**

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"). (Check one):

Large accelerated filer ☐ Accelerated filer ☐ Non-accelerated filer ☒ Smaller reporting company ☒ 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 7(a)(2)(B) of the Securities Act. ☐

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**EXPLANATORY NOTE**

This Post-Effective Amendment No. 1 to the following registration statement on Form S-3 (the "<u>Prior Registration Statement</u>") is being filed by BankFinancial Corporation (the "<u>Company</u>") to terminate all offerings under the Prior Registration Statement and to deregister any and all shares of the Company's common stock, par value $0.01 per share (the "<u>Shares</u>") registered but unsold as of the date hereof thereunder:

Registration Statement on Form S-3, File No. 333-135887, filed with the Securities and Exchange Commission on July 20, 2006, registering securities of the Company for a maximum aggregate offering price of up to $6,592,000.

On January 1, 2026, pursuant to the Agreement and Plan of Merger, dated as of August 11, 2025, by and between First Financial Bancorp., an Ohio corporation ("<u>First Financial</u>"), and the Company, the Company merged with and into First Financial, with First Financial as the surviving corporation (the "<u>Merger</u>").

In connection with the Merger, the Company has terminated all offerings of the Company's securities pursuant to the Prior Registration Statement. Accordingly, pursuant to the undertakings made by the Company in the Prior Registration Statement to remove from registration, by means of a post-effective amendment, any of the securities that remain unsold at the termination of the offerings, this Post-Effective Amendment No. 1 hereby removes from registration all of such securities registered under the Prior Registration Statement that remain unsold as of the date of this Post-Effective Amendment No. 1.

.

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**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Post-Effective Amendment No. 1 to the Prior Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Cincinnati, State of Ohio, on January 6, 2026.

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| | |
|:---|:---|
| **FIRST FINANCIAL BANCORP.**<br> as successor-in-interest to BankFinancial Corporation | **FIRST FINANCIAL BANCORP.**<br> as successor-in-interest to BankFinancial Corporation |
| By:  | /s/ James M. Anderson |
|  | James M. Anderson |
|  | Executive Vice President and Chief Financial Officer |

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No other person is required to sign this Post Effective Amendment No. 1 to the Prior Registration Statement in reliance upon Rule 478 under the Securities Act of 1933, as amended.