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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 11pt">UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 11pt">Washington,
D.C. 20549</FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 12pt"><B>FORM 8-K<BR>
CURRENT REPORT</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Pursuant to Section 13 or 15(d)<BR>
of the Securities Exchange Act of 1934</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Date of Report: <U>April 19, 2012</U></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 14pt"><B>BANK MUTUAL
CORPORATION</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact name of registrant as specified in
its charter)</P>

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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
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    <TD STYLE="width: 32%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; border-bottom: Black 1pt solid">Wisconsin</TD>
    <TD STYLE="width: 2%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="width: 32%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; border-bottom: Black 1pt solid">000-31207</TD>
    <TD STYLE="width: 2%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="width: 32%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; border-bottom: Black 1pt solid">39-2004336</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">(State or other jurisdiction</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">(Commission</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">(I.R.S. Employer</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">of incorporation)</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">File Number</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">Identification No.)</TD></TR>
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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 64%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; border-bottom: Black 1pt solid">4949 West Brown Deer Road, Milwaukee, Wisconsin</TD>
    <TD STYLE="width: 2%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; padding-bottom: 1pt">&nbsp;</TD>
    <TD STYLE="width: 62%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; border-bottom: Black 1pt solid">53223</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">(Address of principal executive offices)</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center">(Zip Code)</TD></TR>
</TABLE>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Registrant&rsquo;s telephone number, including
area code:<BR>
<U>(414) 354-1500 </U></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">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):</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD STYLE="text-align: justify">Written communications pursuant to Rule 425 under the Securities
Act (17 CFR 230.425)</TD>
</TR></TABLE>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD STYLE="text-align: justify">Soliciting material pursuant to Rule 14a-12 under the Exchange
Act (17 CFR 240.14a-12)</TD>
</TR></TABLE>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD STYLE="text-align: justify">Pre-commencement communications pursuant to Rule 14d-2(b)
under the Exchange Act (17 CFR 240.14d-2(b))</TD>
</TR></TABLE>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-family: Wingdings">&#168;</FONT></TD><TD STYLE="text-align: justify">Pre-commencement communications pursuant to Rule 13e-4(c)
under the Exchange Act (17 CFR 240.13e-4(c))</TD>
</TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 34.2pt; text-indent: -34.2pt">&nbsp;&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><U>Item 2.02.&#9; Results of Operations and Financial Condition.</U></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">On April 19, 2012, Bank Mutual Corporation announced its results
for the three months ended March 31, 2012. A copy of Bank Mutual&rsquo;s related press release is furnished to the Commission by
attaching it as Exhibit 99.1 to this report.</P>

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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">* * * * *</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SIGNATURES</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">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.</P>

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<TR>
    <TD STYLE="vertical-align: top">&nbsp;Date: April 19, 2012</TD>
    <TD COLSPAN="2">BANK MUTUAL CORPORATION

<BR>
(Registrant)</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; width: 50%">&nbsp;</TD>
    <TD STYLE="width: 4%">By:&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 46%">/s/ Michael W. Dosland</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top; border-top: #000000 1px solid">Michael W. Dosland

<br>Senior Vice President and Chief Financial Officer

</TD></TR>
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{"company-data": {"conformed-name": "BANK MUTUAL CORP", "cik": "0001123270", "assigned-sic": "6035", "irs-number": "392004336", "state-of-incorporation": "WI", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-31207", "film-number": "12770373"}, "business-address": {"street1": "4949 W. BROWN DEER RD", "city": "BROWN DEER", "state": "WI", "zip": "53223", "phone": "4143626113"}, "mail-address": {"street1": "4949 W. BROWN DEER RD", "city": "BROWN DEER", "state": "WI", "zip": "53223"}}
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:
April 19, 2012
BANK MUTUAL
CORPORATION
(Exact name of registrant as specified in
its charter)
Wisconsin
000-31207
39-2004336
(State or other jurisdiction
(Commission
(I.R.S. Employer
of incorporation)
File Number
Identification No.)
4949 West Brown Deer Road, Milwaukee, Wisconsin
53223
(Address of principal executive offices)
(Zip Code)
Registrant's telephone number, including
area code:
(414) 354-1500
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))
Item 2.02.	 Results of Operations and Financial Condition.
On April 19, 2012, Bank Mutual Corporation announced its results
for the three months ended March 31, 2012. A copy of Bank Mutual's related press release is furnished to the Commission by
attaching it as Exhibit 99.1 to this report.
* * * * *
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.
Date: April 19, 2012
BANK MUTUAL CORPORATION
(Registrant)
By:
/s/ Michael W. Dosland
Michael W. Dosland
Senior Vice President and Chief Financial Officer