UNITED STATES


SECURITIES AND EXCHANGE COMMISSION


WASHINGTON, D.C. 20549








FORM 10-K/A


Amendment No. 1





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|x | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2012


or


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| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For transition period from             to


Commission File Number 0-51331








BANKFINANCIAL CORPORATION


(Exact Name of Registrant as Specified in Charter)











Maryland75-3199276(State or Other Jurisdictionof Incorporation)(I.R.S. EmployerIdentification No.)15W060 North Frontage Road, Burr Ridge, Illinois  60527(Address of Principal Executive Offices)


Registrant’s telephone number, including area code: (800) 894-6900








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





Title of Each Class:Name of Each Exchange on Which Registered:Common Stock, par value $0.01 per shareNASDAQ Global Select Stock Market


Securities registered pursuant to Section 12(g) of the Act: None


Indicate by check mark whether the issuer is a well-known seasoned issuer as defined in Rule 405 of the Securities Act.    Yes  ̈ No x .


Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ̈ No x .


Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes x No  ̈


Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes x No  ̈


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





Large accelerated filer ̈Accelerated filerxNon-accelerated filer ̈Smaller reporting company ̈


Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ̈ No x .


The aggregate market value of the registrant’s outstanding voting common stock held by non-affiliates on June 30, 2012, determined using a per share closing price on that date of $7.53, as quoted on The Nasdaq Stock Market, was $149.6 million.


At March 8, 2013, there were 21,072,966 shares of common stock, $0.01 par value, outstanding.


DOCUMENTS INCORPORATED BY REFERENCE


None




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BANKFINANCIAL CORPORATION


Explanatory Note


This amendment No. 1 to the Annual Report on Form 10-K of BankFinancial Corporation (the "Company") for the year ended December 31, 2012 is being filed to correct the certifications filed as Exhibits 31.1 and 31.2 to the Annual Report as initially filed with the U.S. Securities and Exchange Commission on March 11, 2013. The certifications inadvertently omitted language required by Item 601(b)(31) of U.S. Securities and Exchange Commission Regulation S-K.










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|ITEM 15 | EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a)(3) Exhibits





The documents set forth below are filed herewith or incorporated herein by reference to the location indicated.


ExhibitLocation31.1Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002Filed herewith31.2Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002Filed herewith










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SIGNATURES


Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.





BANKFINANCIAL CORPORATION








Date: March 20, 2013    By: /s/ F. Morgan Gasior


F. Morgan Gasior


Chairman of the Board, Chief Executive Officer and President


(Duly Authorized Representative)