UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                   SCHEDULE TO

            TENDER OFFER STATEMENT UNDER SECTION 14(D)(1) OR 13(E)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                                 FINAL AMENDMENT

                           HATTERAS MASTER FUND, L.P.
                       (Name of Subject Company (Issuer))

                           HATTERAS MASTER FUND, L.P.
                       (Name of Filing Person(s) (Issuer))

                          LIMITED PARTNERSHIP INTERESTS
                         (Title of Class of Securities)

                                       N/A
                      (CUSIP Number of Class of Securities)

                                David B. Perkins
                           8540 Colonnade Center Drive
                                    Suite 401
                                Raleigh, NC 27615
 (Name, Address and Telephone Number of Person Authorized to Receive Notices and
                Communications on Behalf of the Filing Person(s))

                                 With a copy to:
                             Michael P. Malloy, Esq.
                           Drinker Biddle & Reath LLP
                                One Logan Square
                           Philadelphia, PA 19103-6996
                                  215-988-2700

                                 March 26, 2007
                       (Date Tender Offer First Published,
                       Sent or Given to Security Holders)

                            CALCULATION OF FILING FEE

   --------------------------------------------------------------------------
   Transaction Valuation: $ 25,000,000(a) Amount of Filing Fee: $767.50(b)
   --------------------------------------------------------------------------

(a) Calculated as the aggregate maximum value of Interests being purchased.

(b) Calculated at $30.70 per $1,000,000 of the Transaction Valuation.



[X] Check the box if any part of the fee is offset as provided by Rule
0-11(a)(2) and identify the filing with which the offsetting fee was previously
paid. Identify the previous filing by registration statement number, or the Form
or Schedule and the date of its filing.

         Amount Previously Paid:  $767.50
                                  ----------------------------
         Form or Registration No.:  SC TO-I
                                  ----------------------------
         Filing Party:  Hatteras Master Fund, L.P.
                        --------------------------------------
         Date Filed:  March 26, 2007
                      ----------------------------------------

[ ] Check the box if the filing relates solely to preliminary communications
made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the
statement relates:

[   ]      third-party tender offer subject to Rule 14d-1.

[ X ]      issuer tender offer subject to Rule 13e-4.

[   ]      going-private transaction subject to Rule 13e-3.

[   ]      amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer: [X]

This final amendment relates to the Issuer Tender Offer Statement on Schedule TO
(the "Statement")  originally filed with the Securities and Exchange  Commission
on March 26, 2007 by Hatteras  Master Fund, L.P. (the "Fund") in connection with
an offer (the  "Offer") by the Fund to purchase  limited  partnership  interests
("Interests")  in the Fund in an aggregate amount up to $25,000,000 on the terms
and subject to the  conditions  set out in the Offer to Purchase and the related
Letter  of  Transmittal.  Copies  of the  Offer to  Purchase  and the  Letter of
Transmittal  were previously filed as Exhibits B and C to the Statement on March
26, 2007.






This is the final  amendment to the  Statement  and is being filed to report the
results of the Offer.  The following  information is furnished  pursuant to Rule
13e-4(c)(4):

1.  Holders of  Interests  in the Fund  ("Partners")  that  desired to tender an
Interest,  or a portion  thereof,  for  purchase  were  required to submit their
tenders by 12:00 midnight, Eastern Time, on April 30, 2007.

2. As of April 30, 2007, four (4) Partners  validly  tendered  Interests and did
not withdraw  such tenders  prior to the  expiration  of the Offer.  The validly
tendered Interests were accepted for purchase by the Fund in accordance with the
terms of the Offer.

3. The net  asset  value of the  Interests  tendered  pursuant  to the Offer was
calculated as of June 30, 2007 in the amount of $5,300,000.

4. The payment of the purchase  price of the  Interests or portions of Interests
tendered was made in the form of a promissory note issued to each Investor whose
tender was accepted for purchase by the Fund in accordance with the terms of the
Offer.  The promissory  notes were held by UMB Fund  Services,  Inc., the Fund's
administrator,  on behalf of such Investors, in accordance with the terms of the
Offer. The Partners whose tenders were accepted for purchase by the Fund and did
not tender  their  entire  Interests  in the Fund,  therefore,  pursuant  to the
promissory notes issued to the Partners,  the Fund will pay to the Partners 100%
of the  Partners'  unaudited  net asset value of the  Interests  tendered.  Cash
payments  in the  amount  of the  unaudited  net asset  value of the  respective
Interests  tendered were wired to the account  designated by each Partner in the
Letter of Transmittal on July 19, 2007.









                                    SIGNATURE

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



                HATTERAS MASTER FUND, L.P.

                By:      /s/  David B. Perkins
                         -----------------------------------
                         Name:  David B. Perkins
                         Title: President and Chairman of the Board of Directors


                HATTERAS INVESTMENT MANAGEMENT LLC,
                         as General Partner

                By:      /s/  David B. Perkins
                         -----------------------------------
                         Name:  David B. Perkins
                         Title: Managing Member


September 14, 2007