UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  SCHEDULE 13D
                    Under the Securities Exchange Act of 1934

                               (Amendment No. 1)*



                     Flagstone Reinsurance Holdings Limited
--------------------------------------------------------------------------------
                                (Name of Issuer)

                    Common Shares, $0.01 par value per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    G3529T105
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                                 with a copy to:
     Gregory L. Florio, Esq.                     Robert G. Minion, Esq.
     Marathon Asset Management, LP               Lowenstein Sandler PC
     One Bryant Park, 38th Floor                 1251 Avenue of the Americas
     New York, New York 10036                    New York, New York 10020
     212.381.0159                                973.597.2424
--------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                 August 19, 2009
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of Sections 240.13d-1(e),  240.13d-1(f) or 240.13d-1(g),  check
the following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the schedule,  including all exhibits. See Section 240.13d-7 for other
parties to whom copies are to be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).





Cusip No.    G3529T105
--------------------------------------------------------------------------------
1.   Names of Reporting Persons.  I.R.S. Identification Nos. of above persons
     (entities only):

                Marathon Asset Management, LP
--------------------------------------------------------------------------------
2.   Check the Appropriate Box if a Member of a Group (See Instructions):

     (a)           Not
     (b)        Applicable
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------

4.   Source of Funds (See Instructions):  AF, WC
--------------------------------------------------------------------------------
5.   Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d)
     or 2(e):
                Not Applicable
--------------------------------------------------------------------------------

6.   Citizenship or Place of Organization:   Delaware
--------------------------------------------------------------------------------

   Number of                          7. Sole Voting Power:           5,041,177*
                                         ---------------------------------------
   Shares Beneficially                8. Shared Voting Power:                 0*
                                         ---------------------------------------
   Owned by Each Reporting            9. Sole Dispositive Power:      5,041,177*
                                         ---------------------------------------
   Person With                       10. Shared Dispositive Power:            0*
                                         ---------------------------------------
--------------------------------------------------------------------------------

11.  Aggregate Amount Beneficially Owned by Each Reporting Person:   5,041,177*
--------------------------------------------------------------------------------

12.  Check if the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions):         Not Applicable
--------------------------------------------------------------------------------

13.  Percent of Class Represented by Amount in Row (11):     5.9%*
--------------------------------------------------------------------------------

14.  Type of Reporting Person (See Instructions):  IA
--------------------------------------------------------------------------------
* As of August 19, 2009,  Marathon  Special  Opportunity  Master Fund, Ltd. (the
"Master Fund") and Marathon  Special  Opportunity  Liquidating  Fund,  Ltd. (the
"Liquidating  Fund" and together with the Master Fund,  the "Funds") held in the
aggregate  5,014,703  shares of common  shares,  par value  $0.01 per share (the
"Shares"), of Flagstone Reinsurance Holdings Limited, a Bermuda exempted company
(the  "Company").  As of August 19, 2009,  the Master Fund held in the aggregate
26,474 restricted share units ("RSU").  Each RSU represents the right to receive
without payment to the Company one newly-issued,  fully paid and  non-assessable
Share,  subject  to the  terms  and  conditions  of the RSU Plan  and the  grant
certificate  evidencing  each  grant.  In the  discretion  of  the  Compensation
Committee of the Company,  upon vesting, the value of an RSU grant alternatively
may be paid in cash,  or partly in cash and  partly in  Shares.  Marathon  Asset
Management,  LP, a Delaware  limited  partnership  (the  "Investment  Manager"),
serves as the investment manager of the Funds pursuant to one or more Investment
Management Agreements between the Investment Manager and the Funds. As a result,
the  Investment  Manager  possesses the sole power to vote and the sole power to
direct the  disposition  of all  securities  of the  Company  held by the Funds.
Accordingly,  as of August 19,  2009,  for the  purposes of Rule 13d-3 under the
Securities Exchange Act of 1934, as amended, the Investment Manager is deemed to
beneficially  own  5,041,177  Shares,  or 5.9% of the Shares  deemed  issued and
outstanding as of that date.






Item 2.   Identity and Background.
          -----------------------

          Item 2 is hereby amended and restated in its entirety as follows:

          This  Schedule  13D  Amendment  No.  1  is  filed  by  Marathon  Asset
Management,  LP (formerly known as Marathon Asset  Management,  LLC), a Delaware
limited partnership (the "Investment  Manager"),  which serves as the investment
manager of Marathon  Special  Opportunity  Master Fund,  Ltd., a Cayman  Islands
exempted  company  (the  "Master  Fund"),   and  Marathon  Special   Opportunity
Liquidating  Fund,  Ltd., a Cayman Islands  exempted  company (the  "Liquidating
Fund" and together with the Master Fund,  the "Funds"),  pursuant to one or more
Investment  Management  Agreements between the Investment Manager and the Funds.
The Investment  Manager, in its capacity as the investment manager of the Funds,
has the sole power to vote and the sole power to direct the  disposition  of all
securities  of the  Company  held  by the  Funds.  The  general  partner  of the
Investment  Manager is Marathon  Asset  Management  GP, LLC, a Delaware  limited
liability company (the "General Partner").  Bruce Richards and Louis Hanover are
the managing members of the General Partner.

          The  Investment   Manager  and  the  General  Partner  maintain  their
principal  office at One Bryant Park, 38th Floor,  New York, New York 10036. The
Funds  are  engaged  in the  investment  in  personal  property  of  all  kinds,
including,  but not limited to, capital stock,  depository receipts,  investment
companies,  mutual funds,  subscriptions,  warrants,  bonds, notes,  debentures,
options and other securities of whatever kind and nature.

          During  the last  five  years,  none of the  Investment  Manager,  the
General  Partner,  Mr.  Richards  or Mr.  Hanover  has (i) been  convicted  in a
criminal  proceeding  (excluding traffic violations or similar  misdemeanors) or
(ii) been party to a civil  proceeding of a judicial or  administrative  body of
competent jurisdiction and as a result of such proceeding was or is subject to a
judgment,  decree or final order enjoining future  violations of, or prohibiting
or mandating  activities subject to, federal or state securities laws or finding
any violation with respect to such laws.

          Messrs. Richards and Hanover are citizens of the United States.


Item 5.   Interest in Securities of the Issuer.
          ------------------------------------

          Item 5 is hereby amended and restated in its entirety as follows:

          According  to the Form 10-Q for the  quarterly  period  ended June 30,
2009, and filed with the  Securities and Exchange  Commission on August 4, 2009,
there were  84,864,844  shares of common shares,  par value $0.01 per share (the
"Shares"), of Flagstone Reinsurance Holdings Limited, a Bermuda exempted company
(the  "Company"),  issued and  outstanding as of July 31, 2009. As of August 19,
2009, (i) the Funds held in the aggregate  5,014,703  Shares and (ii) the Master
Fund held in the  aggregate  26,474  restricted  share units  ("RSU").  Each RSU
represents the right to receive without payment to the Company one newly-issued,
fully paid and non-assessable  Share, subject to the terms and conditions of the
RSU Plan and the grant  certificate  evidencing each grant. In the discretion of
the  Compensation  Committee of the Company,  upon vesting,  the value of an RSU
grant alternatively may be paid in cash, or partly in cash and partly in Shares.





Accordingly,  as of August 19,  2009,  for the  purposes of Rule 13d-3 under the
Securities Exchange Act of 1934, as amended, the Investment Manager is deemed to
beneficially  own  5,041,177  Shares,  or 5.9% of the Shares  deemed  issued and
outstanding as of that date.

          The following table details the transactions  during the sixty days on
or  prior  to  August  19,  2009 in  Shares,  or  securities  convertible  into,
exercisable for or  exchangeable  for Shares,  by the Investment  Manager or any
other person or entity  controlled  by the  Investment  Manager or any person or
entity for which the Investment  Manager possesses voting or investment  control
over the securities thereof (each of which was effected in an ordinary brokerage
transaction).


                                      Sales

            Date                Security           Amount             Price

            08/19/2009          Shares             179,693            $10.9789
            08/18/2009          Shares              81,647            $11.0596
            08/17/2009          Shares              22,492            $11.009
            08/14/2009          Shares                  76            $11.220
            08/13/2009          Shares              11,253            $11.1456
            08/12/2009          Shares              15,508            $11.2554
            08/12/2009          Shares              11,529            $11.2262








                                    Signature
                                    ---------

          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.


                                         September 8, 2009

                                         MARATHON ASSET MANAGEMENT, LP

                                         By:  Marathon Asset Management GP, LLC,
                                              its general partner


                                         By:  /s/ Gregory Florio
                                            ------------------------------------
                                            Name:  Gregory Florio
                                            Title: Chief Compliance Officer




  Attention: Intentional misstatements or omissions of fact constitute Federal
                   criminal violations (See 18 U.S.C. 1001).