SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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): MARCH 3, 2005 ASPEN INSURANCE HOLDINGS LIMITED (Exact name of registrant as specified in its charter) BERMUDA 001-31909 NOT APPLICABLE (State or other jurisdiction (Commission (I.R.S. of incorporation) File Number) Identification No.) VICTORIA HALL 11 VICTORIA STREET HAMILTON HM 11 BERMUDA (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (441) 295-8201 NOT APPLICABLE (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: [ ] 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)) ================================================================================ ITEM 1.01 ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT On March 3, 2005, Aspen Insurance Holdings Limited (the "Company") granted an aggregate of 512,172 nonqualified stock options and an aggregate of 123,002 performance share awards to various officers and other employees pursuant to the Aspen Insurance Holdings Limited 2003 Share Incentive Plan (the "Plan"). The Plan, a copy of which was filed as Exhibit 10.7 to the Company's Registration Statement on Form F-1 (Registration No. 333-110435), is incorporated by reference into this report. A portion of the awards were given to the Company's named executive officers as follows: Options Performance Shares Christopher O'Kane 60,000 4,000 Julian Cusack 46,445 3,096 Sarah Davies 40,445 2,696 David May 40,445 2,696 James Few 68,773 5,596 The awards will be reflected in Nonqualified Stock Option Agreements and Performance Share Award Agreements containing the following respective terms: Nonqualified Stock Option Agreement Each nonqualified stock option represents the right and option to purchase, on the terms and conditions set forth in the agreement evidencing the grant, ordinary shares of the Company, par value 0.15144558 cent per share. The exercise price of the shares subject to the option is $25.88 per share, which as determined by the Plan is based on the arithmetic mean of the high and low prices of the ordinary shares on the grant date as reported by the NYSE. Subject to the restrictions on exercise described below, the options will vest over a multi-year period, with one-third (1/3) of the shares underlying the options vesting upon the later of (i) the date the Company's outside auditors complete the audit of the Company's financial statements containing the information necessary to compute its return on equity ("ROE") for the fiscal year ended December 31, 2005, or (ii) the date such ROE is approved by the Board of Directors or an authorized committee thereof (the "Initial Vesting"), but only if the Company achieves its ROE target for the fiscal year ended December 31, 2005 (i.e., the fiscal year in which the options are granted). If the Company fails to reach the ROE target for the 2005 fiscal year, but its actual ROE for such year is not less than 66.67% of the target ROE, then a reduced number of shares underlying options will vest over such multi-year period based on the percentage of target ROE achieved, for example, with 10% vesting at 66.67% (the "Reduced Percentage"). A further one-third (1/3) of the shares (or one-third of the Reduced Percentage, as applicable) underlying the options will vest upon each of the first and second anniversaries of the Initial Vesting based on the achievement of the ROE target for the 2005 fiscal year consistent with the terms of the Initial Vesting described above. However, no options will vest if the ROE for the 2005 fiscal year is less than (i) 66.67% of the target ROE for such year or (ii) 10% in absolute terms. Subject to the optionee's continued employment (and lack of notice of resignation or termination), the options will become exercisable on the second anniversary of the Initial Vesting. Once the options are exercisable (as described above), optionees may exercise all or any part of the vested portion of their option at any time prior to the earliest to occur of (i) the tenth anniversary of the date of grant, (ii) the first anniversary of the optionee's termination of employment (x) due to death or disability (as defined in the option agreement), (y) by the Company without cause (as defined in the option agreement), or (z) by the optionee with good reason (as defined in the option agreement), (iii) three months following the date of the optionee's termination of employment by the optionee without good reason, or (iv) 2 the date of the optionee's termination of employment by the Company for cause. Options are exercised by providing written notice specifying the number of shares for which the option is being exercised and the method of payment of the exercise price. Payment of the exercise price may be made in cash (or cash equivalent), in shares, in a combination of cash and shares, or by broker-assisted cashless exercise. The optionee may be required to pay to the Company, and the Company will have the right to withhold, any applicable withholding taxes in respect of the option, its exercise or any payment or transfer under or with respect to the option. Performance Share Award Agreement Each performance share award represents the right to receive, on the terms and conditions set forth in the agreement evidencing the award, a specified number of ordinary shares of the Company, par value 0.15144558 cent per share. Payment of performance shares is contingent upon the achievement of specified ROE targets. One-third (1/3) of the performance shares will become vested upon the later of (i) the date the Company's outside auditors complete the audit of the Company's financial statements containing the information necessary to compute its ROE for the fiscal year ended December 31, 2005, or (ii) the date such ROE is approved by the Board of Directors or an authorized committee thereof, but only if the Company achieves its ROE target for the fiscal year ended December 31, 2005 (the "2005 Award"). If the Company fails to reach the ROE target for the 2005 fiscal year, but its actual ROE for such year is not less than 66.67% of the target ROE, then a reduced number of performance shares will vest based on the percentage of target ROE achieved, for example, with 10% vesting at 66.67%. However, no performance shares will vest if the ROE for the 2005 fiscal year is less than (i) 66.67% of the target ROE for such year or (ii) 10% in absolute terms. Two-thirds (2/3) of the performance shares will become vested and payable upon the later of (i) the date the Company's outside auditors complete the audit of the Company's financial statements containing the information necessary to compute its ROE for the fiscal year ended December 31, 2007, or (ii) the date such ROE is approved by the Board of Directors or an authorized committee thereof, but only if the Company's actual average annual ROE for the 2005, 2006 and 2007 fiscal years meets or exceeds the average annual ROE target for such period (the "2005-2007 Award"). If the Company fails to achieve the average annual ROE target for the 2005, 2006 and 2007 fiscal years, but its actual average ROE for such period is not less than 66.67% of the average annual ROE target, then a reduced number of performance shares will be paid to the participants based on the percentage of the average annual ROE target achieved, for example, with 10% awarded at 66.67%. However, no performance shares will vest for the 2005-2007 Award if the actual average annual ROE for the 2005, 2006 and 2007 fiscal years is less than (i) 66.67% of the average annual ROE target for such period or (ii) 10% in absolute terms. Payment of vested performance shares as part of the 2005 Award shall be paid at the same time as the performance shares part of the 2005-2007 Award are paid (or would have been paid had all or a portion of the 2005-2007 Award vested), subject to the participant's continued employment (and lack of notice of resignation or termination) until such payment date. Payment of vested performance shares as part of the 2005-2007 Award generally will occur as soon as practicable after the date the performance shares become vested, subject to the participant's continued employment (and lack of notice of resignation or termination) until such payment date. Participants may be required to pay to the Company, and the Company will have the right to withhold, any applicable withholding taxes in respect of the performance shares. Performance shares may not be assigned, sold or otherwise transferred by participants other than by will or by the laws of descent and distribution. 3 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. ASPEN INSURANCE HOLDINGS LIMITED (Registrant) Dated: March 9, 2005 By:/s/ Julian Cusack ------------------------- Name: Julian Cusack Title: Chief Financial Officer ================================================================================ 4