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

<P STYLE="text-align: center; text-indent: 0pt; margin: 0; font: 10pt Times New Roman, Times, Serif">SECURITIES AND EXCHANGE COMMISSION</P>

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

<P STYLE="margin: 0pt">&nbsp;</P>

<P STYLE="text-align: center; text-indent: 0pt; margin: 0; font: 10pt Times New Roman, Times, Serif">FORM 8-K</P>

<P STYLE="margin: 0pt">&nbsp;</P>

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

<P STYLE="margin: 0pt">&nbsp;</P>

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

<P STYLE="margin: 0pt">&nbsp;</P>

<P STYLE="text-align: center; text-indent: 0pt; margin: 0; font: 10pt Times New Roman, Times, Serif">&#160;</P>

<P STYLE="text-align: center; text-indent: 0pt; margin: 0; font: 10pt Times New Roman, Times, Serif">Date of Report (Date of earliest
event reported):&#160;&#160;<B><U>February 2, 2012</U></B></P>

<P STYLE="margin: 0pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="background-color: white; width: 100%; font: 10pt Times New Roman, Times, Serif; font-size: 10pt">
<TR>
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="border-bottom: #000000 2px solid; text-align: center; font-weight: bold">Simpson Manufacturing Co., Inc.</TD>
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD></TR>
<TR>
    <TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">(Exact name of registrant as specified in its charter)</TD>
    <TD>&nbsp;</TD></TR>
<TR>
    <TD STYLE="width: 30%">&nbsp;</TD>
    <TD STYLE="width: 5%">&nbsp;</TD>
    <TD STYLE="width: 30%">&nbsp;</TD>
    <TD STYLE="width: 5%">&nbsp;</TD>
    <TD STYLE="width: 30%">&nbsp;</TD></TR>
<TR>
    <TD STYLE="border-bottom: #000000 2px solid; text-align: center; font-weight: bold">Delaware</TD>
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD>
    <TD STYLE="border-bottom: #000000 2px solid; text-align: center; font-weight: bold">1-13429</TD>
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD>
    <TD STYLE="border-bottom: #000000 2px solid; text-align: center; font-weight: bold">94-3196943</TD></TR>
<TR>
    <TD STYLE="text-align: center">(State or other jurisdiction of incorporation)</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">(Commission file number)</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">(I.R.S. Employer Identification No.)</TD></TR>
<TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR>
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="border-bottom: #000000 2px solid; text-align: center; font-weight: bold">5956 W. Las Positas Blvd., Pleasanton, CA 94588</TD>
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD></TR>
<TR>
    <TD>&nbsp;</TD>
    <TD COLSPAN="3" STYLE="text-align: center">(Address of principal executive offices)</TD>
    <TD>&nbsp;</TD></TR>
</TABLE>
<P STYLE="margin: 0pt">&nbsp;</P>

<P STYLE="text-align: center; text-indent: 0pt; margin: 0; font: 10pt Times New Roman, Times, Serif">(Registrant&#8217;s telephone
number, including area code):&#160;&#160;<B>(925) 560-9000</B></P>

<P STYLE="margin: 0pt">&nbsp;</P>

<P STYLE="text-align: justify; text-indent: 0pt; margin: 0; font: 10pt Times New Roman, Times, Serif">&#160;</P>

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

<P STYLE="margin: 0pt">&nbsp;</P>

<P STYLE="text-align: left; text-indent: 0pt; margin: 0; font-size: 10pt"><FONT STYLE="font-family: Wingdings">o </FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT></P>

<P STYLE="text-align: left; text-indent: 0pt; margin: 0; font-size: 10pt"><FONT STYLE="font-family: Wingdings">o </FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-2)</FONT></P>

<P STYLE="text-align: left; text-indent: 0pt; margin: 0; font-size: 10pt"><FONT STYLE="font-family: Wingdings">o </FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</FONT></P>

<P STYLE="text-align: left; text-indent: 0pt; margin: 0; font-size: 10pt"><FONT STYLE="font-family: Wingdings">o </FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240. 13e-4(c))</FONT></P>

<P STYLE="margin: 0pt">&nbsp;</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>Item 2.02 Results of Operations and Financial
Condition.</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify">On February 2, 2012, Simpson Manufacturing
Co., Inc. announced its fourth quarter 2011 results in a press release, a copy of which is attached hereto as Exhibit 99.1 and
incorporated herein by this reference.</P>



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<P STYLE="margin: 0pt">&nbsp;</P>

<P STYLE="margin: 0pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 6pt; margin-left: 0pt; text-indent: 0pt; text-align: justify"><B>Item
9.01&#160; Financial Statement and Exhibits<BR>
</B>&nbsp;</P>

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    <TD STYLE="text-align: left; width: 108pt; text-decoration: underline; text-indent: 0pt">Exhibit Number</TD>
    <TD STYLE="text-align: left; text-decoration: underline; text-indent: 0pt">Description</TD></TR>
</TABLE>
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<TABLE ALIGN="CENTER" BORDER="0" CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 15%; text-indent: 0pt">Exhibit 99.1</TD>
    <TD STYLE="width: 85%; text-indent: 0pt">Press release dated February 2, 2012.</TD>
    <TD STYLE="text-align: justify"></TD></TR>
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<P STYLE="margin: 0pt">&nbsp;&nbsp;</P>

<P STYLE="margin: 0pt">&nbsp;</P>

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

<P STYLE="margin: 0pt">&nbsp;</P>

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

<P STYLE="margin: 0pt">&nbsp;</P>

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<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-bottom: #000000 2px solid; text-align: center; font-weight: bold">Simpson Manufacturing Co., Inc.</TD>
    <TD STYLE="padding-bottom: 2px">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2" STYLE="text-align: center">(Registrant)</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 3%">&nbsp;</TD>
    <TD STYLE="width: 35%">&nbsp;</TD>
    <TD STYLE="width: 12%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: left; border-bottom-color: #ffffff; border-bottom-style: solid; text-indent: 0pt"><B>DATE:</B><FONT STYLE="letter-spacing: 9pt">&#160;&#160;</FONT>February
    2, 2012</TD>
    <TD STYLE="border-bottom-color: #ffffff; border-bottom-style: solid; text-align: left; text-indent: 0pt">By:</TD>
    <TD NOWRAP STYLE="text-align: left; border-bottom: black 2px solid">/s/&#160;BRIAN J. MAGSTADT</TD>
    <TD STYLE="border-bottom-color: #ffffff; border-bottom-style: solid">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD NOWRAP STYLE="text-align: left; vertical-align: bottom">Brian J. Magstadt</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Chief Financial Officer</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
</TABLE>
<P STYLE="margin: 0pt">&nbsp;</P>

<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; font-size: 10pt">
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: left; width: 72pt; text-indent: 0pt">Exhibit 99.1</TD>
    <TD STYLE="text-align: left; text-indent: 0pt">Press release dated February 2, 2012.</TD></TR>
</TABLE>
<P STYLE="margin: 0pt">&nbsp;</P>

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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 (Date of earliest
event reported):
February 2, 2012
Simpson Manufacturing Co., Inc.
(Exact name of registrant as specified in its charter)
Delaware
1-13429
94-3196943
(State or other jurisdiction of incorporation)
(Commission file number)
(I.R.S. Employer Identification No.)
5956 W. Las Positas Blvd., Pleasanton, CA 94588
(Address of principal executive offices)
(Registrant's telephone
number, including area code):
(925) 560-9000
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:
o
Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-2)
o
Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
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 February 2, 2012, Simpson Manufacturing
Co., Inc. announced its fourth quarter 2011 results in a press release, a copy of which is attached hereto as Exhibit 99.1 and
incorporated herein by this reference.
Item
9.01  Financial Statement and Exhibits
Exhibit Number
Description
Exhibit 99.1
Press release dated February 2, 2012.
2
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.
Simpson Manufacturing Co., Inc.
(Registrant)
DATE:
February
    2, 2012
By:
/s/ BRIAN J. MAGSTADT
Brian J. Magstadt
Chief Financial Officer
Exhibit 99.1
Press release dated February 2, 2012.
3