8-K

UNITED STATES
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): June 28, 2005

ASPEN INSURANCE HOLDINGS LIMITED
(Exact name of registrant as specified in its charter)

Bermuda				001-31909				Not Applicable
(State or other jurisdiction of incorporation)				(Commission File Number)				(I.R.S. Employer 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))

Section 7 — Regulation FD

Item 7.01    Regulation FD Disclosure

On June 28, 2005, Aspen Insurance Holdings Limited issued a press release updating its guidance with respect to estimated gross written premiums for 2005.

Section 9.    Financial Statements and Exhibits

Item 9.01 — Financial Statements and Exhibits

(c)    The following exhibit is furnished under Item 7.01 as part of this report:

	99.1	Press Release of the Registrant, dated June 28, 2005.

The information furnished under Item 7.01 "Regulation FD Disclosure" shall not be deemed "filed" for purpose 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.

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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: June 28, 2005

By: /s/ Julian Cusack

Name:    Julian Cusack Title:       Chief Financial Officer

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INDEX TO EXHIBITS

Exhibit No.				Description
99.1				Press Release of the Registrant dated June 28, 2005.

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EX-99.1

[GRAPHIC OMITTED][ASPEN LOGO]
                                                                    EXHIBIT 99.1
           FOR IMMEDIATE RELEASE

           INVESTOR CONTACTS:

           Aspen Insurance Holdings Limited          Tel: 441-297-9382
           Noah Fields, Head of Investor Relations
           Julian Cusack, Chief Financial Officer


           U.K. CONTACT:

           The Maitland Consultancy                  Tel: 44 20 7379 5151
           Brian Hudspith



           ASPEN INSURANCE HOLDINGS LIMITED UPDATES ITS GUIDANCE RELATING TO TOP
           LINE GROWTH FOR 2005

           HAMILTON, BERMUDA, June 28, 2005 -- Aspen Insurance Holdings Limited
           (the "Company") (NYSE: AHL;BSX:AHL BH) today announced that it is
           updating its guidance relating to annual growth in its gross written
           premiums for 2005. For 2005, Aspen now expects that its gross written
           premiums will be between 20% and 25% higher than 2004.

           Chris O'Kane, chief executive officer, said, "I am pleased by the
           success of our newly established teams and the continued strong
           performance of our business across all areas. I believe that the
           additional business being written is of a comparable quality to our
           current portfolio and meets our rigorous underwriting and pricing
           criteria."

           This anticipated growth in gross written premiums reflects a number
           of factors but is mainly driven by Aspen's new marine and aviation
           insurance teams (who joined in the fourth quarter of 2004 and first
           quarter of 2005 repectively), which have been successful to date in
           writing a higher percentage of our targeted business than the
           Company had anticipated at the end of the first quarter. The
           results of Aspen's marine and aviation insurance business lines are
           included in its Specialty segment.

           The Company anticipates that its Insurance segment, excluding Aspen
           Specialty, will show a decline year on year as rates continue to
           weaken in this area. Aspen Specialty, the Company's US excess and
           surplus lines business, is now fully established and is performing
           well following a slow start last year. The Company's Insurance
           segment comprises mainly UK commercial property, UK employers'
           liability and public liability and the business written by Aspen
           Specialty.

           In Aspen's Casualty Reinsurance segment, rates have held up well and
           have continued to improve in certain lines, in particular in medical
           malpractice treaty business and as a result the Company is continuing
           to see attractive new business opportunities in this area.

           In the Property Reinsurance segment, the Company is anticipating a
           reduction in gross premiums written overall year on year. This,
           however, has been partially offset by the inclusion in this segment
           of approximately $40 million of gross written premiums in respect of
           a quota share of Lloyds' Syndicate 958 (Omega Underwriting Agents),
           which Aspen wrote for the first time in 2005.




           Excluding the impact of our new marine and aviation insurance lines
           and the quota share referenced above, the Company anticipates that
           growth in its more mature business lines will amount to less than 5%
           year on year.

           Aspen plans to report in detail its results of operations for the
           second quarter of 2005 in a press release following the close of the
           New York Stock Exchange on July 27, 2005. A conference call reviewing
           results from the second quarter of 2005 will be conducted at 8:30
           a.m. (Eastern Time) on July 28 at which Aspen will comment further on
           its guidance for 2005. Aspen's policy is that it does not provide
           estimates or guidance with respect to earnings.

           ABOUT ASPEN INSURANCE HOLDINGS LIMITED

           Aspen Insurance Holdings Limited was established in June 2002. 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 marine
           and aviation insurance worldwide through Aspen Insurance UK Limited.
           Aspen's operations are conducted through its wholly-owned
           subsidiaries located in London, Bermuda and the United States: Aspen
           Insurance UK Limited, 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. Aspen's principal
           existing shareholders include The Blackstone Group, Candover Partners
           Limited, Wellington Underwriting plc and Credit Suisse First Boston
           Private Equity. 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, and Aspen's earnings conference call may
           contain, written or oral "forward-looking statements" within the
           meaning of the U.S. federal securities laws. 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
           concerning future events and are subject to a number of uncertainties
           and other factors, many of which are outside the Company's control
           that could cause actual results to differ materially from such
           statements. Important events that could cause the actual results to
           differ include, but are not limited to: the impact of acts of
           terrorism and acts of war and related legislations; the possibility
           of greater frequency or severity of or unanticipated losses from
           natural or man-made catastrophes, including losses developing from
           the 2004 windstorms in the southeastern U.S. and Japan; the
           effectiveness of the Company's loss limitation methods; changes in
           the availability, cost or quality of reinsurance or retrocessional
           coverage; the loss of key personnel; a decline, change of outlook or
           other discussions with respect to the operating subsidiaries' ratings
           with Standard & Poor's, A.M. Best or Moody's; changes in general
           economic conditions; increased competition on the basis of pricing,
           capacity, coverage terms or other factors; decrease in demand for the
           Company's insurance or reinsurance products and cyclical downturn of
           the industry; and changes in governmental regulation or tax laws in
           the jurisdictions where the Company conducts business, the total
           industry losses resulting from the 2004 windstorms, the actual number
           of the Company's insureds incurring losses from these storms, the
           limited actual loss reports received from the Company's insureds to
           date, the Company's reliance on industry loss estimates and those
           generated by modeling techniques, the impact of these storms on the
           Company's reinsurers, the amount and timing of reinsurance
           recoverables and reimbursements actually received by the Company from
           its reinsurers and the overall level of competition, and the related
           demand and supply dynamics, in the wind exposed property reinsurance
           lines as contracts come up for renewal. Due in part to the
           assumptions and factors above, any projections of growth in the
           Company's gross written premiums or similar financial information
           would not necessarily result in commensurate levels of underwriting
           and operating profits. In addition, any opinions or other views about
           the Company's anticipated results by third parties should not be
           relied on as having been endorsed by the Company. For a more detailed
           description of these uncertainties and other factors, please see the
           "Risk Factors" section in Aspen's

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           Annual Report on Form 10-K for the year ended December 31, 2004,
           filed with the U.S. Securities and Exchange Commission on March 14,
           2005. Aspen undertakes no obligation to publicly update or revise any
           forward-looking statements, whether as a result of new information,
           future events or otherwise. Readers are cautioned not to place undue
           reliance on these forward-looking statements, which speak only as of
           the dates on which they are made.

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