Aspen Added to Russell 3000 and Russell 2000 Investment Indexes

  
    
  
  
    
      Aspen Insurance Holdings Limited ("Aspen" or "the Company") (NYSE:AHL) 
      today announced that Aspen received notification it will be added to the 
      Russell 3000® broad-market index and the 
      Russell 2000® small-cap stock market equity 
      index on June 22, 2007. The Russell indexes are widely used by 
      investment managers and institutional investors as benchmarks for both 
      passive and active investment strategies.
    
    
      Chris O’Kane, Aspen’s 
      Chief Executive Officer, commenting on the index inclusions said: “I 
      am pleased that Aspen has been added to the Russell 3000® 
      and the Russell 2000® indexes. With more than 
      $4 trillion in assets benchmarked against the Russell indexes, Aspen’s 
      membership in two of the largest Russell indexes provides new routes for 
      investors to access our stock.”
    
    
      Membership in the Russell 3000® and the 
      Russell 2000® remain in place for one year, 
      and the Russell 3000® serves as the U.S. 
      component of the Russell Global Index. Russell determines membership for 
      its equity indexes primarily by objective, market capitalization and 
      style attributes.
    
    
      About Aspen Insurance Holdings Limited
    
    
      Aspen is a Bermudian holding company that provides property and casualty 
      reinsurance in the global market, property and liability insurance 
      principally in the United Kingdom and the United States and specialty 
      insurance and reinsurance consisting mainly of marine and energy and 
      aviation worldwide. Aspen’s operations are 
      conducted through its wholly-owned subsidiaries located in London, 
      Bermuda and the United States: Aspen Insurance UK Limited (“Aspen 
      Re”), Aspen Insurance Limited and Aspen 
      Specialty Insurance Company. Aspen has four operating segments: property 
      reinsurance, casualty reinsurance, specialty insurance and reinsurance 
      and property and casualty insurance. For more information about Aspen, 
      please visit the Company’s website at www.aspen.bm.
    
    
      Application of the Safe Harbor of the Private Securities Litigation 
      Reform Act of 1995
    
    
      This press release contains written, and Aspen’s 
      officers may make related oral, “forward-looking 
      statements” within the meaning of the U.S. 
      federal securities laws regarding Aspen's membership in the Russell 
      indexes. These statements are made pursuant to the safe harbor 
      provisions of the Private Securities Litigation Reform Act of 1995. 
      Forward-looking statements include all statements that do not relate 
      solely to historical or current facts, and can be identified by the use 
      of words such as “expect,” 
      “intend,” “plan,” 
      “believe,” “project,” 
      “anticipate,” “seek,” 
      “will,” “estimate,” 
      “may,” “continue,” 
      and similar expressions of a future or forward-looking nature.
    
    
      All forward-looking statements rely on a number of assumptions, 
      estimates and data concerning future results and events and are subject 
      to a number of uncertainties and other factors, many of which are 
      outside Aspen’s control that could cause 
      actual results to differ materially from such statements. For a detailed 
      description of uncertainties and other factors that could impact the 
      forward-looking statements in this release, please see the “Risk 
      Factors” section in Aspen’s 
      Annual Report on Form 10-K for the year ended December 31, 2006, filed 
      with the U.S. Securities and Exchange Commission on February 22, 2007.