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        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br>&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman">UNITED
  STATES</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman">SECURITIES
  AND EXCHANGE COMMISSION</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Washington,
  D.C. 20549</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman">FORM
  8-K</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CURRENT
  REPORT</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
  to Section 13 OR 15(d) of</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
  Securities Exchange Act of 1934</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date of
  Report (Date of earliest event reported): &#160; April 16, 2010</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div>
          <table cellpadding="0" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
  <tr>
                <td valign="top" width="70%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><a name="fis_unidentified_table"><!--efplaceholder-->
  </a>&#160;</font></div>
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">SUPERTEX,
        INC.</font></div>
                </td>
              </tr><tr>
                <td align="left" valign="top" width="70%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
        </font></td>
              </tr><tr>
                <td valign="top" width="70%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Exact
        name of registrant as specified in its
  charter)</font></div>
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              </tr></table>
        </div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div>
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  <tr>
                <td valign="top" width="21%" style="BORDER-BOTTOM: black 2px solid">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></div>
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">California</font></div>
                </td>
                <td align="left" valign="middle" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
        </font></td>
                <td valign="top" width="18%" style="BORDER-BOTTOM: black 2px solid">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></div>
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">0-12718</font></div>
                </td>
                <td align="left" valign="middle" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
        </font></td>
                <td valign="top" width="21%" style="BORDER-BOTTOM: black 2px solid">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></div>
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">94-2328535</font></div>
                </td>
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                <td valign="top" width="21%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(State
        or other jurisdiction of incorporation)</font></div>
                </td>
                <td align="left" valign="middle" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
        </font></td>
                <td valign="top" width="18%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Commission
        File Number)</font></div>
                </td>
                <td align="left" valign="middle" width="5%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
        </font></td>
                <td valign="top" width="21%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(IRS
        Employer Identification No.)</font></div>
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        <div>
          <table cellpadding="0" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
  <tr>
                <td valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></div>
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">1235
        Bordeaux Drive, Sunnyvale, California</font></div>
                </td>
                <td valign="top" width="20%" style="BORDER-BOTTOM: black 2px solid">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></div>
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">94089</font></div>
                </td>
              </tr><tr>
                <td valign="top" width="50%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Address
        of principal executive offices)</font></div>
                </td>
                <td valign="top" width="20%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Zip
        Code)</font></div>
                </td>
              </tr></table>
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        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Registrant&#8217;s
  telephone number, including area code <font style="DISPLAY: inline; FONT-WEIGHT: bold; TEXT-DECORATION: underline">408-222-8888</font></font></div>
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        <div>
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  <tr>
                <td align="left" valign="top" width="70%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
        </font></td>
              </tr><tr>
                <td align="left" valign="top" width="70%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
        </font></td>
              </tr><tr>
                <td valign="top" width="70%">
                  <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Former
        name or former address, if changed since last
    report.)</font></div>
                </td>
              </tr></table>
        </div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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):</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[ ]
  Written communications pursuant to Rule 425 under the Securities Act (17 CFR
  230.425)</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[ ]
  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
  240.14a-12)</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[ ]
  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act
  (17 CFR 240.14d-2(b))</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">[ ]
  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act
  (17 CFR 240.13e-4(c))</font></div><br>
        <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
          <div id="FTR">
            <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">&#160;
  </font></div>
          </div>
          <div id="PN" style="PAGE-BREAK-AFTER: always; WIDTH: 100%">
            <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">&#160;
  </font></div>
            <div style="WIDTH: 100%; TEXT-ALIGN: center">
              <hr style="COLOR: black" noshade size="2">
            </div>
          </div>
          <div id="HDR">
            <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">&#160;
  </font></div>
          </div>
        </div><br>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><a name="FIS_RESULTS_OF_OPERATIONS"><!--EFPlaceholder-->
  </a>TABLE OF
  CONTENTS</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
  1.01&#160;&#160;Entry into a Material Definitive Agreement.</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
  2.02&#160;&#160;&#160;Results of Operations and Financial
  Condition.</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
  9.01&#160;&#160;&#160;Financial Statements and Exhibits.</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Signatures</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><a name="FIS_ENTRY_MATERIAL_AGREEMENT"><!--EFPlaceholder-->
  </a><a name="D8K_HTM_TX74545_1"><!--EFPlaceholder-->
  </a>Item
  1.01&#160;&#160;&#160;&#160;&#160;Entry into a Material Definitive
  Agreement.</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On April
  16, 2010, Registrant entered into an amendment to its lease with Sobrato
  Development #871 covering the premises for its San Jose, California wafer fab
  located at 71 Vista Montana.&#160;&#160;The amendment extends the lease for five
  years, through April 30, 2016; specifies the monthly rental rate, which is
  reduced from the current rent; and eliminates the need for Registrant to fund
  earthquake insurance. The full text of the lease amendment is attached as
  Exhibit 10.9 to this Current Report on Form 8-K.</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
  2.02.&#160;&#160;&#160;&#160;Results of Operations and Financial
  Condition.</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On April
  20, 2010, Registrant announced via news release estimated results for its fiscal
  2010 fourth quarter ended April 3, 2010.&#160;&#160;The full text of the news
  release issued in connection with that announcement is attached as Exhibit 99.1
  to this Current Report on Form 8-K.</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
  information contained in Item 2.02 and Exhibit 99.1 of this Current Report on
  Form 8-K shall not be deemed "filed" for purposes of Section 18 of the
  Securities Exchange Act of 1934 (the "Exchange Act") or otherwise subject to the
  liabilities of that section, nor shall it be deemed incorporated by reference in
  any filing under the Securities Act of 1933 or the Exchange Act, except as
  expressly set forth by specific reference in such filing.</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><a name="FIS_FINANCIAL_STATEMENTS_AND_EXHIBITS"><!--EFPlaceholder-->
  </a>Item
  9.01&#160;&#160;&#160;&#160;Financial Statements and Exhibits.</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold">&#160;&#160;
  </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(d)&#160;&#160;Exhibits.</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt">
        </div>
        <div>&#160;</div>
        <div align="right">
          <table bgcolor="white" cellpadding="0" cellspacing="0" width="97%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
  <tr>
                <td width="100%"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Exhibit 10.9, Sixth
        Amendment to Lease made April 16, 2010, by and between Sobrato Development
        #871 and Registrant, is filed pursuant to Item 1.01 of Form
    8-K.</font></td>
              </tr><tr>
                <td width="100%"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              </tr><tr>
                <td width="100%"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Exhibit 99.1,
        Registrant's News Release dated April 20, 2010, is furnished pursuant to
        Item 2.02 of Form 8-K.</font></td>
              </tr></table>
        </div>
        <div>&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><a name="eolPage2"><!--EFPlaceholder-->
  </a><br></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><a name="FIS_SIGNATURES"><!--EFPlaceholder-->
  </a>SIGNATURES</font></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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.</font></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
        <div>
          <table cellpadding="0" cellspacing="0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">
  <tr>
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        <font style="TEXT-DECORATION: underline">PHILLIP A.
        KAGEL</font></font></div>
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  Officer</font></div>
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text: supx8kearningsguidanceq4fy10.htm
  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):   April 16, 2010
  SUPERTEX,
        INC.
  (Exact
        name of registrant as specified in its
  charter)
  California
  0-12718
  94-2328535
  (State
        or other jurisdiction of incorporation)
  (Commission
        File Number)
  (IRS
        Employer Identification No.)
  1235
        Bordeaux Drive, Sunnyvale, California
  94089
  (Address
        of principal executive offices)
  (Zip
        Code)
  Registrant's
  telephone number, including area code
  408-222-8888
  (Former
        name or former address, if changed since last
    report.)
  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))
  TABLE OF
  CONTENTS
  Item
  1.01  Entry into a Material Definitive Agreement.
  Item
  2.02   Results of Operations and Financial
  Condition.
  Item
  9.01   Financial Statements and Exhibits.
  Signatures
  Item
  1.01     Entry into a Material Definitive
  Agreement.
  On April
  16, 2010, Registrant entered into an amendment to its lease with Sobrato
  Development #871 covering the premises for its San Jose, California wafer fab
  located at 71 Vista Montana.  The amendment extends the lease for five
  years, through April 30, 2016; specifies the monthly rental rate, which is
  reduced from the current rent; and eliminates the need for Registrant to fund
  earthquake insurance. The full text of the lease amendment is attached as
  Exhibit 10.9 to this Current Report on Form 8-K.
  Item
  2.02.    Results of Operations and Financial
  Condition.
  On April
  20, 2010, Registrant announced via news release estimated results for its fiscal
  2010 fourth quarter ended April 3, 2010.  The full text of the news
  release issued in connection with that announcement is attached as Exhibit 99.1
  to this Current Report on Form 8-K.
  The
  information contained in Item 2.02 and Exhibit 99.1 of this Current Report on
  Form 8-K shall not be deemed "filed" for purposes of Section 18 of the
  Securities Exchange Act of 1934 (the "Exchange Act") or otherwise subject to the
  liabilities of that section, nor shall it be deemed incorporated by reference in
  any filing under the Securities Act of 1933 or the Exchange Act, except as
  expressly set forth by specific reference in such filing.
  Item
  9.01    Financial Statements and Exhibits.
  (d)  Exhibits.
  Exhibit 10.9, Sixth
        Amendment to Lease made April 16, 2010, by and between Sobrato Development
        #871 and Registrant, is filed pursuant to Item 1.01 of Form
    8-K.
  Exhibit 99.1,
        Registrant's News Release dated April 20, 2010, is furnished pursuant to
        Item 2.02 of Form 8-K.
  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.
  Supertex,
        Inc
  (Registrant)
  Date:
        April 21, 2010
  By
  /s/
  PHILLIP A.
        KAGEL
  Name
  Phillip
        A. Kagel
  Title
  Vice
        President, Finance and Chief Financial
  Officer
  Exhibit
  Index
  Exhibit
  Exhibit
  Description
  Exhibit
        10.9
  Sixth Amendment to
        Lease made April 16, 2010, by and between Sobrato Development #87 and
        Registrant, is filed pursuant to Item 1.01 of Form 8-K.
  Exhibit
        99.1
  Registrant's News
        Release dated April 20, 2010, is furnished pursuant to Item 2.02 of Form
        8-K.