| In connection with an exchange offer, Swiss Re Ltd acquired all of the outstanding shares of Swiss Reinsurance Company Ltd. The first closing of the exchange offer occurred on May 20, 2011, at which time Swiss Re Ltd acquired 86.3% of the outstanding shares of Swiss Reinsurance Company Ltd. The second closing of the exchange offer occurred on June 10, 2011, at which time Swiss Re held 98.1% of the outstanding shares of Swiss Reinsurance Company Ltd. The balance of the shares was acquired December 13, 2011 pursuant to a decision by the Commercial Court, Canton of Zurich dated November 18, 2011. As of May 20, 2011, Swiss Re Ltd and Swiss Reinsurance Company Ltd may each have been deemed to beneficially own 3,000,000 Shares, representing 5.94% of the Shares (based upon 50,521,316 Shares stated to have been outstanding as of May 2, 2011, by the Issuer in its Form 10-Q filed for the quarterly period ended March 31, 2011). On December 4, 2012, Swiss Reinsurance Company Ltd contributed the 3,000,000 Shares to a wholly owned subsidiary, Swiss Re Direct Investments Company Ltd, which in turn was wholly owned by Swiss Re Principal Investments Company Ltd. As of December 4, 2012, the Reporting Persons may each have been deemed to beneficially own 3,000,000 Shares, representing 6.07% of the Shares (based upon 49,417,138 Shares stated to have been outstanding as of November 2, 2012, by the Issuer in its Form 10-Q filed for the quarterly period ended September 30, 2012). On March 25, 2013, Swiss Reinsurance Company Ltd distributed all of the outstanding shares of Swiss Re Principal Investments Company Ltd via a dividend-in-kind to its parent company Swiss Re Ltd. As of March 25, 2013, Swiss Re Ltd, Swiss Re Principal Investments Company Ltd and Swiss Re Direct Investments Company Ltd may each have been deemed to beneficially own 3,000,000 Shares, representing 6.07% of the Shares (based upon 49,395,602 Shares stated to have been outstanding as of February 25, 2013, by the Issuer in its Form 10-K filed for the fiscal year ended December 31, 2012). On March 25, 2013, Swiss Reinsurance Company Ltd ceased to be a beneficial owner of any Shares. As of May 20, 2011: |