Renaissance reports 4.62% stake in BankFinancial

Renaissance Technologies LLC and Renaissance Technologies Holdings Corporation report beneficial ownership of 575,287 shares of BankFinancial CORP common stock, equal to 4.62% of the class as of 12/31/2025.

Accepted by SEC EDGAR 02/12/2026 - 02:12 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Renaissance Technologies LLC and Renaissance Technologies Holdings Corporation report beneficial ownership of 575,287 shares of BankFinancial CORP common stock, equal to 4.62% of the class as of 12/31/2025.

They report sole voting and dispositive power over these shares, with no shared power. The firms state the securities were acquired and are held in the ordinary course of business, not to change or influence control of BankFinancial. Certain funds managed by Renaissance Technologies LLC have the right to receive dividends and sale proceeds on these shares.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What ownership stake does Renaissance report in BankFinancial CORP (BFIN)?

Renaissance reports beneficial ownership of 575,287 BankFinancial CORP common shares, representing 4.62% of the outstanding class as of December 31, 2025. This stake gives them sole voting and dispositive power over these shares, with no shared authority reported.

Which Renaissance entities are listed as reporting persons for BFIN?

The filing lists Renaissance Technologies LLC and Renaissance Technologies Holdings Corporation as the reporting persons. Both are organized in Delaware and jointly report the same 575,287 BankFinancial CORP shares, with identical voting and dispositive powers disclosed for each entity.

Is Renaissance’s BankFinancial CORP (BFIN) position considered passive?

Yes. The certification states the securities were acquired and are held in the ordinary course of business and not for the purpose or effect of changing or influencing control of BankFinancial CORP, indicating a passive investment intent under the Schedule 13G framework.

Who benefits economically from Renaissance’s BankFinancial CORP shares?

The filing notes that certain funds managed by Renaissance Technologies LLC have the right to receive dividends and proceeds from the sale of the BankFinancial CORP shares. This means Renaissance manages the holdings, while those funds benefit from income and any sale proceeds.

Why does the Schedule 13G/A note ownership of 5 percent or less of BFIN?

Item 5 confirms ownership of 5 percent or less of BankFinancial CORP’s common stock, consistent with the 4.62% reported. This disclosure indicates the position is below the 5% threshold that typically triggers more extensive Schedule 13D-style reporting obligations.

What voting and dispositive powers does Renaissance have over BFIN shares?

Renaissance reports sole power to vote, or direct the vote of, 575,287 BankFinancial CORP shares and sole power to dispose of, or direct the disposition of, the same number. The filing reports zero shared voting or shared dispositive power over these securities.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)

BankFinancial CORP

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

06643P104

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 06643P104

1

Names of Reporting Persons

Renaissance Technologies LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 575,287.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 575,287.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

575,287.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.62 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP No. 06643P104

1

Names of Reporting Persons

Renaissance Technologies Holdings Corporation

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 575,287.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 575,287.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

575,287.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.62 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: BankFinancial CORP
(b)	Address of issuer's principal executive offices: 60 NORTH FRONTAGE ROAD, BURR RIDGE, IL 60527
Item 2.
(a)	Name of person filing: This Schedule 13G is being filed by Renaissance Technologies LLC ("RTC") and Renaissance Technologies Holdings Corporation ("RTHC").
(b)	Address or principal business office or, if none, residence: 800 Third Avenue New York, New York 10022
(c)	Citizenship: RTC is a Delaware limited liability company, and RTHC is a Delaware corporation.
(d)	Title of class of securities: Common Stock, par value $0.01 per share
(e)	CUSIP No.: 06643P104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 575287
(b)	Percent of class: 4.62 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 575287
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 575287
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Certain funds managed by RTC have the right to receive dividends and proceeds from the sale of the securities which are the subject of this report.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Renaissance Technologies LLC

Signature:	Brian Felczak
Name/Title:	Chief Financial Officer
Date:	02/12/2026

Renaissance Technologies Holdings Corporation

Signature:	Brian Felczak
Name/Title:	Vice President
Date:	02/12/2026

Exhibit Information

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the undersigned agrees to the filing on behalf of each of a Statement on Schedule 13G, and all amendments thereto, with respect to the shares of Common Stock, par value $0.01 per share of BankFinancial CORP.