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  <p style="border:none;margin:0in 0in .0001pt;padding:0in;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED
  STATES</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES
  AND EXCHANGE COMMISSION</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington,
  D.C.&nbsp;&nbsp;20549</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Current
  Report Pursuant to Section&nbsp;13 or 15(d)<br>
  of the Securities Exchange Act of 1934</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">April&nbsp;24, 2008</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of Report (Date of earliest event reported)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">Arch
  Capital Group Ltd.</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of
  registrant as specified in its charter)</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div align="center">
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Bermuda</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">0-26456</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">N/A</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other<br>
    jurisdiction of<br>
    incorporation or<br>
    organization)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission File Number)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(I.R.S. Employer<br>
    Identification No.)</font></p>
    </td>
   </tr>
  </table>
  
  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Wessex House, 45 Reid Street, Hamilton HM 12, Bermuda</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of principal executive offices) (Zip Code)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Registrant&#146;s telephone number, including area code:<br>
  <b>(441) 278-9250</b></font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">N/A</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Former name or former address, if changed since last report)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check
  the appropriate box below if the Form&nbsp;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></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="96%" valign="top" style="padding:0in 0in 0in 0in;width:96.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Written
    communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR
    230.425)</font></p>
    </td>
   </tr>
   <tr>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="96%" valign="top" style="padding:0in 0in 0in 0in;width:96.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Soliciting
    material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR
    240.14a-12)</font></p>
    </td>
   </tr>
   <tr>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="96%" valign="top" style="padding:0in 0in 0in 0in;width:96.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pre-commencement
    communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17
    CFR 240.14d-2(b))</font></p>
    </td>
   </tr>
   <tr>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font></p>
    </td>
    <td width="96%" valign="top" style="padding:0in 0in 0in 0in;width:96.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pre-commencement
    communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17
    CFR 240.13e-4(c))</font></p>
    </td>
   </tr>
  </table>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;margin:0in 0in .0001pt;padding:0in;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  </div>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\105567\08-10919-1\task2865308\10919-1-ba.htm',USER='105567',CD='Apr 16 04:30 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ITEM 2.02&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <u>Results of Operations and Financial
  Condition</u>.</font></b></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On April&nbsp;24, 2008,
  Arch Capital Group Ltd. issued a press release reporting its earnings for the three
  month period ended March&nbsp;31, 2008.&#160;
  A copy of this press release is attached to this Current Report on Form&nbsp;8-K
  as Exhibit&nbsp;99.1 and is incorporated herein by reference.</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The information in this Current
  Report on Form&nbsp;8-K, including the information set forth in Exhibit&nbsp;99.1,
  shall not be deemed &#147;filed&#148; for purposes of Section&nbsp;18 of the Securities Exchange
  Act of 1934, as amended (the &#147;Exchange Act&#148;), or incorporated by reference in
  any filing under the Securities Act of 1933, as amended, or the Exchange Act,
  except as shall be expressly set forth by specific reference in such a filing</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">ITEM 9.01&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <u>Exhibits</u>.</font></b></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="10%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:10.26%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">EXHIBIT&nbsp;NO.</font></b></p>
    </td>
    <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.66%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="83%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:83.08%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">DESCRIPTION</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="10%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:10.26%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.66%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="83%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:83.08%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="10%" valign="top" style="padding:0in 0in 0in 0in;width:10.26%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.66%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="83%" valign="top" style="padding:0in 0in 0in 0in;width:83.08%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press Release dated
    April&nbsp;24, 2008 announcing the earnings of Arch Capital Group Ltd. for
    the three month period ended March&nbsp;31, 2008</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>
  
  <div style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='2',FILE='C:\JMS\105567\08-10919-1\task2865308\10919-1-ba.htm',USER='105567',CD='Apr 16 04:30 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">SIGNATURES</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the
  requirements of the Securities Exchange Act of 1934, as amended, the registrant
  has duly caused this report to be signed on its behalf by the undersigned
  hereunto duly authorized.</font></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="50%" colspan="3" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">ARCH CAPITAL GROUP LTD.</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="50%" colspan="3" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="50%" colspan="3" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date: &nbsp;April&nbsp;24, 2008</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.6%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
    </td>
    <td width="45%" colspan="2" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:45.4%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;&nbsp;&nbsp;&nbsp; /s/ John D. Vollaro</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.6%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:5.4%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>
    </td>
    <td width="40%" valign="top" style="border:none;border-top:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:40.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp; John D. Vollaro</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.6%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.4%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>
    </td>
    <td width="40%" valign="top" style="padding:0in 0in 0in 0in;width:40.0%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Executive Vice
    President,<br>
    Chief Financial Officer and<br>
    Treasurer</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">3</font></p>
  
  <div style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='3',FILE='C:\JMS\105567\08-10919-1\task2865308\10919-1-ba.htm',USER='105567',CD='Apr 16 04:30 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">EXHIBIT
  INDEX</font></b></p>
  
  <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="10%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:10.42%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">EXHIBIT&nbsp;NO.</font></b></p>
    </td>
    <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.5%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="83%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:83.08%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">DESCRIPTION</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="10%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:10.42%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.5%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="83%" valign="bottom" style="border:none;padding:0in 0in 0in 0in;width:83.08%;">
    <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="10%" valign="top" style="padding:0in 0in 0in 0in;width:10.42%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">99.1</font></p>
    </td>
    <td width="6%" valign="bottom" style="padding:0in 0in 0in 0in;width:6.5%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="83%" valign="top" style="padding:0in 0in 0in 0in;width:83.08%;">
    <p style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press Release dated
    April 24, 2008 announcing the earnings of Arch Capital Group Ltd. for the
    three month period ended March 31, 2008</font></p>
    </td>
   </tr>
  </table>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-align:center;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">4</font></p>
  
  <div style="margin:0in 0in .0001pt;punctuation-wrap:simple;text-autospace:none;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
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metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "a08-10919_18k.htm", "description": "8-K", "secsgml_size_bytes": 29730}]
metadata_filer: {"company-data": {"conformed-name": "ARCH CAPITAL GROUP LTD.", "cik": "0000947484", "assigned-sic": "6331", "irs-number": "000000000", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-16209", "film-number": "08775209"}, "business-address": {"street1": "WESSEX HOUSE", "street2": "45 REID STREET", "city": "HAMILTON", "state": "D0", "zip": "HM 12", "phone": "441-278-9250"}, "mail-address": {"street1": "WESSEX HOUSE", "street2": "45 REID STREET", "city": "HAMILTON", "state": "D0", "zip": "HM 12"}, "former-company": [{"former-conformed-name": "ARCH CAPITAL GROUP LTD", "date-changed": "20000508"}, {"former-conformed-name": "RISK CAPITAL HOLDINGS INC", "date-changed": "19950816"}, {"former-conformed-name": "RISK CAPITAL RE INC", "date-changed": "19950703"}]}
text: 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
  April 24, 2008
  Date of Report (Date of earliest event reported)
  Arch
  Capital Group Ltd.
  (Exact name of
  registrant as specified in its charter)
  Bermuda
  0-26456
  N/A
  (State or other
  jurisdiction of
  incorporation or
  organization)
  (Commission File Number)
  (I.R.S. Employer
  Identification No.)
  Wessex House, 45 Reid Street, Hamilton HM 12, Bermuda
  (Address of principal executive offices) (Zip Code)
  Registrant's telephone number, including area code:
  (441) 278-9250
  N/A
  (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):
  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-12)
  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 April 24, 2008,
  Arch Capital Group Ltd. issued a press release reporting its earnings for the three
  month period ended March 31, 2008. 
  A copy of this press release is attached to this Current Report on Form 8-K
  as Exhibit 99.1 and is incorporated herein by reference.
  The information in this Current
  Report on Form 8-K, including the information set forth in Exhibit 99.1,
  shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange
  Act of 1934, as amended (the "Exchange Act"), or incorporated by reference in
  any filing under the Securities Act of 1933, as amended, or the Exchange Act,
  except as shall be expressly set forth by specific reference in such a filing
  ITEM 9.01
  Exhibits
  .
  EXHIBIT NO.
  DESCRIPTION
  99.1
  Press Release dated
    April 24, 2008 announcing the earnings of Arch Capital Group Ltd. for
    the three month period ended March 31, 2008
  2
  SIGNATURES
  Pursuant to the
  requirements of the Securities Exchange Act of 1934, as amended, the registrant
  has duly caused this report to be signed on its behalf by the undersigned
  hereunto duly authorized.
  ARCH CAPITAL GROUP LTD.
  Date:  April 24, 2008
  By:
  /s/ John D. Vollaro
  Name:
  John D. Vollaro
  Title:
  Executive Vice
    President,
  Chief Financial Officer and
  Treasurer
  3
  EXHIBIT
  INDEX
  EXHIBIT NO.
  DESCRIPTION
  99.1
  Press Release dated
    April 24, 2008 announcing the earnings of Arch Capital Group Ltd. for the
    three month period ended March 31, 2008
  4