SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 6)

IF Bancorp, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

44951J105

(CUSIP Number)

Mr. Joseph Stilwell
200 Calle del Santo Cristo, Segundo Piso
San Juan, PR, 00901
787-985-2193

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

03/12/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP Number(s):

44951J105

Name of reporting person

Stilwell Activist Fund, L.P.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

Aggregate amount beneficially owned by each reporting person

0.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

44951J105

Name of reporting person

Stilwell Activist Investments, L.P.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

Aggregate amount beneficially owned by each reporting person

0.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

44951J105

Name of reporting person

Stilwell Value LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

Aggregate amount beneficially owned by each reporting person

0.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP Number(s):

44951J105

Name of reporting person

Stilwell Joseph

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

Aggregate amount beneficially owned by each reporting person

0.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

0 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Common Stock, par value $0.01 per share

(b)

Name of Issuer:

IF Bancorp, Inc.

(c)

Address of Issuer's Principal Executive Offices:

201 E. CHERRY ST, WATSEKA, ILLINOIS , 60970.

Item 2.

Identity and Background

(a)

This is the sixth amendment (the "Sixth Amendment") to the Schedule 13D, which was filed on September 18, 2023 (the "2023 Schedule 13D"), and amended on May 28, 2024 (the "First Amendment"), on November 15, 2024 (the "Second Amendment"), on August 26, 2025 (the "Third Amendment"), on September 17, 2025 (the "Fourth Amendment"), and on January 16, 2026 (the "Fifth Amendment"). This Sixth Amendment is being filed jointly by Stilwell Activist Fund, L.P., a Delaware limited partnership ("Stilwell Activist Fund"); Stilwell Activist Investments, L.P., a Delaware limited partnership ("Stilwell Activist Investments"); Stilwell Value LLC, a Delaware limited liability company ("Stilwell Value LLC") and the general partner of Stilwell Activist Fund and Stilwell Activist Investments; and Joseph Stilwell, the managing member and owner of Stilwell Value LLC (collectively, "we" or "us"). The filers of this statement are collectively referred to herein as the "Group." The joint filing agreement of the members of the Group was filed as Exhibit 1 to the 2023 Schedule 13D. This statement is filed by Joseph Stilwell with respect to the shares of common stock, par value $0.01 per share (the "Common Stock") of IF Bancorp, Inc. (the "Issuer") previously beneficially owned by Joseph Stilwell, including shares of Common Stock previously held in the names of Stilwell Activist Fund and Stilwell Activist Investments, in Joseph Stilwell's capacities as the managing member and owner of Stilwell Value LLC, which is the general partner of Stilwell Activist Fund and Stilwell Activist Investments.

(b)

The business address of Stilwell Activist Fund, Stilwell Activist Investments, and Stilwell Value LLC is 111 Broadway, 12th Floor, New York, New York 10006. The business address of Joseph Stilwell is 200 Calle del Santo Cristo, Segundo Piso, San Juan, Puerto Rico 00901.

(c)

The principal employment of Joseph Stilwell is investment management. Stilwell Activist Fund and Stilwell Activist Investments are private investment partnerships engaged in the purchase and sale of securities for their own accounts. Stilwell Value LLC serves as the general partner of Stilwell Activist Fund and Stilwell Activist Investments, and related partnerships.

(d)

During the past five years, no member of the Group has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e)

During the past five years, no member of the Group has been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, Federal or State securities laws or finding any violation with respect to such laws, except as indicated in Schedule B, attached hereto and incorporated herein by reference.

(f)

Joseph Stilwell is a citizen of the United States.

Item 3.

Source and Amount of Funds or Other Consideration

Since we last reported purchases of Common Stock, Stilwell Activist Fund has not expended any monies to acquire shares of Common Stock. Since we last reported purchases of Common Stock, Stilwell Activist Investments has not expended any monies to acquire shares of Common Stock.

Item 4.

Purpose of Transaction

We are filing this Sixth Amendment to report that, as a result of the Issuer's announced sale, members of the Group have sold all of their shares of Common Stock pursuant to the merger. We are pleased that the Issuer has chosen to sell itself and are supportive of the merger. We believe this outcome is in the best interests of all shareholders. Our purpose in acquiring shares of Common Stock of the Issuer was to profit from the appreciation in the market price of the shares of Common Stock through asserting shareholder rights. We filed the 2023 Schedule 13D reporting our position on September 18, 2023. On May 28, 2024, we submitted a shareholder proposal under Rule 14a-8 calling for the prompt sale of the Issuer. The proposal was approved by stockholders at the Issuer's 2024 annual meeting of stockholders (the "2024 Annual Meeting"). On May 14, 2025, the Federal Reserve Bank of Chicago notified us that it would not object to our request to buy additional shares of the Issuer up to 19.99%. On August 26, 2025, we served our notice of intent to nominate Scott J. Dworschak for election as a director at the Issuer's 2025 annual meeting of stockholders. On September 16, 2025, we entered into a standstill agreement (the "Standstill Agreement") whereby the Issuer agreed, among other things, to appoint Mr. Dworschak to its board of directors. On September 24, 2025, the Issuer appointed Mr. Dworschak to its board. Pursuant to the terms of the Standstill Agreement, the Issuer further agreed that, if, after March 31, 2026, the Issuer failed to substantially implement the matters approved by stockholders at its 2024 Annual Meeting, we would select at our discretion, and the Issuer's board would appoint, an additional nominee to the board. On October 30, 2025, the Issuer announced its sale to ServBanc Holdco, Inc. Except as described in this filing, no member of the Group has any plans or proposals which relate to, or could result in, any of the matters referred to in paragraphs (a) through (j), inclusive, of Item 4 of Schedule 13D. Members of the Group may, at any time and from time to time, review or reconsider their positions and formulate plans or proposals with respect thereto. Since 2000, members or affiliates of the Group have taken an 'activist position' in 78 other publicly-traded companies. In each instance, our purpose has been to profit from the appreciation in the market price of the shares we held by asserting shareholder rights. In addition, we believed that the values of the companies' assets were not adequately reflected in the market prices of their shares. Our actions with respect to such publicly-traded companies are described in Schedule A, attached hereto and incorporated herein by reference.

Item 5.

Interest in Securities of the Issuer

(a)

None of Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Value LLC or Joseph Stilwell beneficially owns any shares of Common Stock.

(b)

None of Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Value LLC or Joseph Stilwell beneficially owns any shares of Common Stock.

(c)

Since the filing of the Fifth Amendment, each of Stilwell Activist Fund and Stilwell Activist Investments sold shares of Common Stock pursuant to the merger as set forth in Schedule C, attached hereto and incorporated herein by reference. Stilwell Value LLC and Joseph Stilwell have not purchased or sold any shares of Common Stock.

(d)

No person other than Stilwell Activist Fund, Stilwell Activist Investments, Stilwell Value LLC and Joseph Stilwell is known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the shares of Common Stock.

(e)

As of March 12, 2026, the Group ceased to beneficially own more than 5% of the outstanding shares of Common Stock.

Item 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer

Other than the Joint Filing Agreement filed as Exhibit 1 to the 2023 Schedule 13D, there are no contracts, arrangements, understandings or relationships among the persons named in Item 2 hereof and between such persons and any person with respect to any securities of the Issuer, including but not limited to transfer or voting of any of the securities, finders' fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, divisions of profits or losses, or the giving or withholding of proxies, except for sharing of profits. See Items 1 and 2 above regarding disclosure of the relationships between members of the Group, which disclosure is incorporated herein by reference.

Item 7.

Material to be Filed as Exhibits.

Schedule A - Stilwell Activist History Schedule B - Item 2(e) Schedule C - Transactions in Securities Exhibit 1 - Joint Filing Agreement, dated September 18, 2023, filed with the 2023 Schedule 13D. Exhibit 2 - Proposal, dated May 28, 2024, filed with the First Amendment. Exhibit 3 - Nominee Agreement, dated August 26, 2025, with Scott J. Dworschak. Exhibit 4 - Nominee Agreement, dated August 26, 2025, with Douglas P. Hutchison, Jr. Exhibit 5 - Standstill Agreement, dated September 16, 2025, incorporated by reference to Exhibit 10 to the Issuer's Form 8-K filed with the Securities and Exchange Commission on September 16, 2025.

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.

Stilwell Activist Fund, L.P.

Signature:	/s/ Megan Parisi
Name/Title:	Megan Parisi, Member of Stilwell Value LLC, its General Partner
Date:	03/16/2026

Stilwell Activist Investments, L.P.

Signature:	/s/ Megan Parisi
Name/Title:	Megan Parisi, Member of Stilwell Value LLC, its General Partner
Date:	03/16/2026

Stilwell Value LLC

Signature:	/s/ Megan Parisi
Name/Title:	Megan Parisi, Member
Date:	03/16/2026

Stilwell Joseph

Signature:	/s/ Joseph Stilwell
Name/Title:	Joseph Stilwell*
Date:	03/16/2026

Megan Parisi

Signature:	/s/ Megan Parisi
Name/Title:	*Megan Parisi, Attorney-in-Fact
Date:	03/16/2026

Amendment: SEC Form SCHEDULE 13D/A filed by IF Bancorp Inc.