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

                           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
                               8816 Six Forks Road
                                    Suite 107
                          Raleigh, North Carolina 27615
                                  919-846-2324
 (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

                                  June 23, 2006
                       (Date Tender Offer First Published,
                       Sent or Given to Security Holders)

                            CALCULATION OF FILING FEE

 ------------------------------------------------------------------------------
 Transaction Valuation:  $20,000,000 (a)   Amount of Filing Fee:  $2,140.00 (b)
 ------------------------------------------------------------------------------

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

(b) Calculated at $107.00 per $1,000,000 of the Transaction Valuation.


[ ]      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:
                                  ----------------------------------------------
         Form or Registration No.:
                                    --------------------------------------------
         Filing Party:
                        --------------------------------------------------------
         Date Filed:
                      ----------------------------------------------------------

[ ]      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: [ ]

ITEM 1.  SUMMARY TERM SHEET.

o        Hatteras  Master  Fund,  L.P.  (the  "Fund") is  offering  to  purchase
         Interests (as defined  below) in the Fund (the "Offer") in an amount up
         to  $20,000,000 of the net assets of the Fund from partners of the Fund
         (the  "Partners")  at their net asset  value (that is, the value of the
         Fund's total assets minus its total liabilities, including accrued fees
         and expenses,  multiplied by the  proportionate  interest in the Fund a
         Partner  desires to tender,  after  giving  effect to all  allocations,
         including any  incentive  allocation)  calculated as of the  Repurchase
         Date  (as  defined  below).  As used  in this  Schedule  TO,  the  term
         "Interest" or "Interests" refers to the limited  partnership  interests
         in the Fund or  portions  of  interests  that  constitute  the class of
         security  that is the  subject of the Offer,  and  includes  all or any
         portion of a Partner's Interest as the context requires.  Partners that
         desire to tender an Interest for purchase must do so by 12:00 midnight,
         Eastern Standard Time on July 25, 2006 (the "Initial Notice Due Date"),
         subject to any  extension of the Offer made in the absolute  discretion
         of the Fund's Board of Directors.  The later of the Initial  Notice Due
         Date or the  latest  time and date  that  the  Fund  designates  as the
         deadline  and  expiration  date for  Partners to tender an Interest for
         purchase  is called the  "Notice  Due Date," and is the date upon which
         the Offer expires.  The net asset value of Interests will be calculated
         for  this  purpose  as  of  September  30,  2006,  or at a  later  date
         determined  by the Fund if the Offer is  extended  (in each  case,  the
         "Repurchase Date").

o        The Fund reserves the right to adjust the Repurchase Date to correspond
         with any  extension  of the Offer.  The Fund will  review the net asset
         value  calculation  of the  Interests  during the Fund's  audit for the
         fiscal  year  ending on or after the  Repurchase  Date,  which the Fund
         expects will be completed  within 60 days of the fiscal  year-end,  and
         that net asset value will be used to  determine  the final  amount paid
         for tendered  Interests.  Since the Fund's fiscal year end is March 31,
         2007,  the Fund  expects that the audit will be completed by the end of
         May 2007.

                                       2


o        A Partner may tender its entire  Interest or a portion of its Interest;
         however,  the minimum value of a repurchase is $50,000,  subject to the
         discretion  of  the  General   Partner  (as  defined  below)  to  allow
         otherwise. See Item 4(a)(1)(ii).

o        If a Partner tenders its Interest and the Fund purchases that Interest,
         the   Fund   will   issue   the   Partner   a   non-interest   bearing,
         non-transferable  promissory note (the "Note") entitling the Partner to
         receive  an  amount  equal  to the  unaudited  net  asset  value of the
         Interest  tendered  (valued in accordance  with the Fund's  Amended and
         Restated  Agreement of Limited  Partnership  dated as of March 31, 2005
         (as it may be amended,  modified or otherwise supplemented from time to
         time,  the  "Partnership  Agreement"))  determined as of the Repurchase
         Date.

o        The Note will entitle the Partner to receive an initial payment in cash
         (valued  according to the Partnership  Agreement) equal to at least 90%
         (100%  in the case of a  Partner  that  tenders  less  than its  entire
         Interest) of the unaudited net asset value of the Interest  tendered by
         the Partner  that is accepted  for  purchase by the Fund (the  "Initial
         Payment"). The Fund may take up to 90 days after the Repurchase Date to
         make the Initial Payment.

o        In the case of a Partner  that  tenders its entire  Interest,  the Note
         will also  entitle the  Partner to receive a  contingent  payment  (the
         "Post-Audit Payment") equal to the excess, if any, of (1) the net asset
         value of the Interest  tendered and purchased as of the Repurchase Date
         (as it may be adjusted  based upon the next annual  audit of the Fund's
         financial  statements),  OVER (2) the Initial  Payment.  The Post-Audit
         Payment will be payable  promptly  after the  completion  of the Fund's
         next annual audit. Final adjustments of payments in connection with the
         repurchased  Interests  generally  will  be  made  promptly  after  the
         completion  of the annual  audit of the Fund.  Proceeds  of the Initial
         Payment  and  the   Post-Audit   Payment,   if   applicable,   will  be
         wire-transferred  directly to an account designated by the Partner. The
         Note  will be held by PFPC  Inc.  (referred  to herein as "PFPC" or the
         "Administrator")  on the Partner's behalf.  Upon a written request by a
         Partner to PFPC,  PFPC will mail the Note to the Partner at the address
         of the Partner as maintained in the books and records of the Fund.  See
         Item 4(a)(1)(ii).

o        Partial  Interests will be repurchased on a "first  in-first out" basis
         (i.e.,  the portion of the Interest  repurchased will be deemed to have
         been taken from the earliest capital  contribution made by such Partner
         (adjusted for  subsequent  appreciation  and  depreciation)  until that
         capital   contribution  is  decreased  to  zero,  and  then  from  each
         subsequent  capital  contribution  made by such  Partner (as  adjusted)
         until such capital contribution is decreased to zero).

o        The  Offer  is  being  made  to all  Partners  of the  Fund  and is not
         conditioned on any minimum amount of Interests being  tendered.  If the
         Fund accepts the tender of the Partner's  Interest,  the Fund will make
         payment for  Interests it purchases  from one or more of the  following
         sources: cash on hand, proceeds from the sale of securities held by the
         Fund,  withdrawal  proceeds  from  investment  funds in which  the Fund
         invests,  or borrowings.  The purchase  amount will be paid entirely in
         cash. See Item 4(a)(1)(ii).

o        Partners  that desire to tender an Interest for purchase  must do so by
         12:00 midnight, Eastern Standard Time, on Tuesday, July 25, 2006 (or if
         the Offer is extended, by any later Notice Due Date), at which time the
         Offer is scheduled to expire.  Until the Notice Due Date, Partners have
         the right to change  their  minds and  withdraw  any  tenders  of their
         Interests.  Interests withdrawn may be re-tendered,  however,  provided
         that such tenders are made before the Notice Due Date by following  the
         tender procedures  described herein. If the Fund has not yet accepted a
         Partner's  tender of an  Interest on or prior to August 21, 2006 (I.E.,
         the date 40  business  days  from the  commencement  of the  Offer),  a
         Partner will also have the right to withdraw its tender of its Interest
         after such date. See Item 4(a)(1)(vi).

                                       3


o        If a Partner would like the Fund to purchase its entire Interest or any
         portion of its Interest,  it should complete,  sign and either (i) mail
         (via certified mail,  return receipt  requested) or otherwise deliver a
         Letter of Transmittal to Hatteras  Master Fund,  L.P., c/o PFPC Inc. at
         P.O.  Box  219,  Claymont,  Delaware  19703,  Attention:  Tender  Offer
         Administrator;  or (ii)  fax it to PFPC at (302)  791-2790,  Attention:
         Tender  Offer  Administrator,  so  that  it is  received  before  12:00
         midnight,  Eastern  Standard  Time,  on July 25,  2006.  IF THE PARTNER
         CHOOSES TO FAX THE  LETTER OF  TRANSMITTAL,  IT MUST MAIL THE  ORIGINAL
         LETTER OF TRANSMITTAL TO PFPC PROMPTLY AFTER IT IS FAXED  (ALTHOUGH THE
         ORIGINAL,  IF FAXED,  DOES NOT HAVE TO BE RECEIVED BY MAIL BEFORE 12:00
         MIDNIGHT,   EASTERN   STANDARD  TIME,  ON  JULY  25,  2006).  See  Item
         4(a)(1)(vii).  The value of the  Interests  may change  between May 31,
         2006 (the last  time  prior to the date of this  filing as of which net
         asset value was  calculated)  and the  Repurchase  Date, the date as of
         which the value of the Interests  being  purchased  will be determined.
         See Item 2(b).  Partners  desiring  to obtain the  estimated  net asset
         value of their  Interests,  which the Fund will  calculate from time to
         time based upon the  information  the Fund  receives from the portfolio
         managers of the investment funds in which it invests, may contact PFPC,
         at (800)  348-1824  or at the  address  listed on the first page of the
         Letter of Transmittal,  Monday through Friday, except holidays,  during
         normal  business  hours of 9:00  a.m.  to 5:00 p.m.  (Eastern  Standard
         Time).

               Please  note that just as each  Partner has the right to withdraw
its tender prior to the Notice Due Date, the Fund has the right to cancel, amend
or postpone the Offer at any time before the Notice Due Date.  Also realize that
although  the Offer is  scheduled  to expire on July 25,  2006,  a Partner  that
tenders  its  entire  Interest  will  remain a Partner of the Fund  through  the
Repurchase  Date,  when  the  net  asset  value  of the  Partner's  Interest  is
calculated,  notwithstanding the Fund's acceptance of the Partner's Interest for
purchase.

ITEM 2.        ISSUER INFORMATION.

               (a) The name of the issuer is "Hatteras  Master  Fund,  L.P." The
Fund is  registered  under the  Investment  Company Act of 1940, as amended (the
"1940 Act"), as a closed-end,  non-diversified,  management  investment company,
and is organized as a Delaware  limited  partnership.  The  principal  executive
office of the Fund is located at 8816 Six Forks Road, Suite 107, Raleigh,  North
Carolina, 27615 and its telephone number is (919) 846-2324.

               (b) The title of the securities that are the subject of the Offer
is "limited partnership  interests," or portions thereof, in the Fund. As of the
close  of  business  on May 31,  2006,  the net  asset  value  of the  Fund  was
$249,225,601.  Subject to the  conditions  set out in the  Offer,  the Fund will
purchase  Interests in an amount up to $20,000,000 of the net assets of the Fund
that are tendered by and not withdrawn by Partners as described above in Item 1.

               (c) There is no established trading market for the Interests, and
any transfer of an Interest is strictly  limited by the terms of the Partnership
Agreement.

ITEM 3.        IDENTITY AND BACKGROUND OF FILING PERSON.

               The name of the filing  person  (I.E.,  the Fund and the  subject
company) is "Hatteras Master Fund,  L.P." The Fund's principal  executive office
is located at 8816 Six Forks Road, Suite 107, Raleigh, North Carolina, 27615 and
the  telephone  number is (919)  846-2324.  The  General  Partner of the Fund is
Hatteras  Investment  Management  LLC (the  "General  Partner").  The  principal
executive office of the General Partner is located at 8816 Six Forks Road, Suite
107,  Raleigh,  North  Carolina,  27615.  The investment  manager of the Fund is
Hatteras  Investment  Partners,  LLC (the "Investment  Manager").  The principal
executive  office of the  Investment  Manager is located at 8816 Six Forks Road,
Suite 107, Raleigh, North Carolina,  27615. The directors on the Fund's board of
directors (the "Board of Directors") are David B. Perkins,  H. Alexander Holmes,
Steve E. Moss and Gregory S. Sellers. Their address is c/o Hatteras Master Fund,
L.P. at 8816 Six Forks Road, Suite 107, Raleigh, North Carolina 27615.

                                       4


ITEM 4.        TERMS OF THE TENDER OFFER.

               (a) (1) (i) Subject to the conditions  set out in the Offer,  the
Fund will purchase Interests in an amount up to $20,000,000 of the net assets of
the Fund that are tendered by Partners by 12:00 midnight, Eastern Standard Time,
on July 25, 2006 (or if the Offer is extended, by any later Notice Due Date) and
not withdrawn as described in Item 4(a)(1)(vi).

               (ii) The value of the Interests tendered to the Fund for purchase
will be the net asset value as of the close of business on  September  30, 2006,
or,  if the  Offer  is  extended,  as of any  later  Repurchase  Date.  See Item
4(a)(1)(v) below.

               A Partner  may  tender its  entire  Interest  or a portion of its
Interest.  Each Partner  that tenders an Interest  that is accepted for purchase
will be given a Note, a non-interest bearing,  non-transferable promissory note,
promptly after the Notice Due Date. The Note will entitle the Partner to be paid
an amount  equal to the value,  determined  as of the  Repurchase  Date,  of the
Interest  being  purchased  (subject to adjustment  upon  completion of the next
annual  audit of the Fund's  financial  statements).  The Note will  entitle the
Partner to receive the Initial  Payment in an amount equal to at least 90% (100%
in the case of a Partner  that  tenders  less than its entire  Interest)  of the
unaudited net asset value of the Interest  tendered and accepted for purchase by
the Fund,  determined as of the Repurchase Date. The Fund may take up to 90 days
after the Repurchase Date to make the Initial Payment.  In the case of a Partner
that  tenders  its  entire  Interest,  the Note will also  entitle a Partner  to
receive the Post-Audit  Payment,  a contingent  payment equal to the excess,  if
any, of (1) the net asset value of the Interest tendered and purchased as of the
Repurchase  Date (as it may be adjusted  based upon the next annual audit of the
Fund's  financial  statements),  OVER (2) the Initial  Payment.  The  Post-Audit
Payment will be payable  promptly after the completion of the Fund's next annual
audit.  Final  adjustments  of  payments  in  connection  with  the  repurchased
Interests  generally  will be made promptly  after the  completion of the annual
audit of the  Fund.  It is  anticipated  that  the  annual  audit of the  Fund's
financial  statements  will be  completed no later than 60 days after the fiscal
year-end of the Fund.

               The purchase amount will be paid entirely in cash.

               (iii) The Offer is scheduled to expire at 12:00 midnight, Eastern
Standard Time, on July 25, 2006.  Partners that desire to tender an Interest for
purchase  must do so by that time,  unless the Offer is extended in the absolute
discretion of the Board of Directors.

               (iv) Not applicable.

               (v) At the absolute  discretion  of the Board of  Directors,  the
Fund reserves the right, at any time and from time to time, to extend the period
of time during which the Offer is open by notifying  Partners of such extension.
If the Fund  elects to extend  the  tender  period,  the net asset  value of the
Interests tendered for purchase will be determined at the close of business on a
day  determined  by the Fund  and  notified  to the  Partners.  During  any such
extension,  all  Interests  previously  tendered and not  withdrawn  will remain
subject to the Offer. At the absolute discretion of the Board of Directors,  the
Fund also  reserves  the  right,  at any time and from  time to time,  up to and
including the Notice Due Date, to: (a) cancel the Offer in the circumstances set
out in Section 8 of the Offer to Purchase dated June 23, 2006, and, in the event
of such cancellation, not to purchase or pay for any Interests tendered pursuant
to the Offer; (b) amend the Offer; and (c) postpone the acceptance of Interests.
If the Fund  determines  to amend the Offer or to  postpone  the  acceptance  of
Interests tendered, it will, to the extent necessary,  extend the period of time
during which the Offer is open as provided  above and will  promptly  notify the
Partners.

                                       5


               (vi) Until the Notice Due Date, Partners have the right to change
their minds and withdraw any tenders of their Interests. Interests withdrawn may
be  re-tendered,  however,  provided  that such  tenders are made  before  12:00
midnight, Eastern Standard Time, July 25, 2006 (or, if the Offer is extended, by
any later Notice Due Date) by following the tender procedures  described herein.
Pursuant to Rule  13e-4(f)(2)(ii)  of the  Securities  Exchange Act of 1934,  as
amended  (the  "Exchange  Act"),  if the Fund has not yet  accepted a  Partner's
tender of an Interest on or prior to August 21, 2006 (I.E., the date 40 business
days from the  commencement of the Offer), a Partner will also have the right to
withdraw its tender of its Interest after such date.

               (vii) Partners wishing to tender Interests  pursuant to the Offer
should send or deliver a completed and executed Letter of Transmittal to PFPC to
the attention of the Tender Offer  Administrator,  at the address set out on the
first page of the Letter of Transmittal,  or fax a completed and executed Letter
of Transmittal to PFPC, also to the attention of the Tender Offer Administrator,
at the fax number set out on the first  page of the Letter of  Transmittal.  The
completed and executed Letter of Transmittal must be received by PFPC, either by
mail or by fax, no later than 12:00 midnight, Eastern Standard Time, on July 25,
2006 (or if the Offer is  extended,  by any later  Notice  Due  Date).  The Fund
recommends  that all  documents be submitted to PFPC by certified  mail,  return
receipt  requested,  or by facsimile  transmission.  A Partner choosing to fax a
Letter of Transmittal  to PFPC must also send or deliver the original  completed
and executed Letter of Transmittal to PFPC promptly thereafter.

               Any  Partner  tendering  an  Interest  pursuant  to the Offer may
withdraw its tender as described above in Item 4(a)(1)(vi). To be effective, any
notice of  withdrawal  must be timely  received  by PFPC at the  address  or fax
number  set out on the  first  page of the  Letter of  Transmittal.  A tender of
Interests  properly  withdrawn shall not thereafter be deemed to be tendered for
purposes of the Offer. Interests withdrawn may be re-tendered, however, provided
that such  tenders are made before the Notice Due Date by  following  the tender
procedures described above.

               (viii) For purposes of the Offer, the Fund will be deemed to have
accepted  (and  thereby  purchased)  Interests  that are tendered if and when it
gives written  notice to the tendering  Partner of its election to purchase such
Interest.

               (ix) If Interests in excess of  $20,000,000  of the net assets of
the Fund are duly  tendered  to the Fund  prior to the  Notice  Due Date and not
withdrawn  prior to the  Notice Due Date,  the Fund will in its sole  discretion
either: (a) accept the additional Interests permitted to be accepted pursuant to
Rule 13e-4(f)(3) under the Exchange Act; (b) extend the Offer, if necessary, and
increase  the amount of  Interests  that the Fund is  offering to purchase to an
amount it believes  sufficient to accommodate the excess  Interests  tendered as
well  as any  Interests  tendered  during  the  extended  Offer;  or (c)  accept
Interests  tendered  before the Notice Due Date and not  withdrawn  prior to the
Notice Due Date for payment on a pro rata basis based on the aggregate net asset
value of tendered Interests.  The Offer may be extended,  amended or canceled in
various other circumstances described in Item 4(a)(1)(v) above.

               (x) The purchase of Interests pursuant to the Offer will have the
effect of increasing the proportionate  interest in the Fund of Partners that do
not tender  Interests.  Partners  that retain their  Interests may be subject to
increased  risks  that may  possibly  result  from the  reduction  in the Fund's
aggregate assets resulting from payment for the Interests tendered.  These risks
include the potential for greater  volatility due to decreased  diversification.
The Fund believes; however, that this result is unlikely given the nature of the
Fund's investment  program.  A reduction in the aggregate assets of the Fund may
result in Partners  that do not tender  Interests  bearing  higher  costs to the
extent that certain  expenses borne by the Fund are relatively fixed and may not
decrease if assets  decline.  These  effects may be reduced or eliminated to the
extent that additional  subscriptions for Interests are made by new and existing
Partners  from time to time.  Payment for  Interests  purchased  pursuant to the
Offer may also require the Fund to liquidate portfolio holdings earlier than the
Fund's  Investment  Manager  would  otherwise  have caused these  holdings to be
liquidated,  potentially  resulting  in losses or increased  investment  related
expenses.

                                       6


               (xi) Not applicable.

               (xii)  The  following  discussion  is a  general  summary  of the
federal  income tax  consequences  of the  purchase of Interests by the Fund for
cash pursuant to the Offer. Partners should consult their own tax advisors for a
complete  description  of the tax  consequences  to them of a purchase  of their
Interests by the Fund pursuant to the Offer.

               A Partner who sells all or part of the Partner's  Interest to the
Fund will  generally  recognize  income or gain only to the extent the amount of
cash  received by the Partner  exceeds the  Partner's  adjusted tax basis in the
Partner's entire Interest at that time. The Partner's  adjusted tax basis in the
Partner's  Interest  will be reduced by the amount of any cash  received  by the
Partner  from the  Fund,  and any  excess of that  cash  over  that  basis  will
generally constitute capital gain for the Partner. It is possible, however, that
Partners  might  recognize  some  ordinary  income by reason of the sale,  under
certain  technical  rules  that apply to the  extent a partner  disposes  of the
partner's  share of  "unrealized  receivables"  of a partnership  (as defined in
Internal  Revenue Code section  751). No loss will be recognized by a Partner on
such a sale to the Fund,  except that a Partner who sells the  Partner's  entire
Interest  to  the  Fund  may  recognize  a  capital  loss  at  the  time  of the
determination  of the  Post-Audit  Payment  to the  extent  the  aggregate  cash
received, and to be received, by the Partner is less than the Partner's adjusted
tax basis in the Interest.

                   (2) Not applicable.

               (b) Any Interests to be purchased  from any officer,  director or
affiliate  of the Fund  will be on the same  terms and  conditions  as any other
purchase of Interests.

ITEM 5.        PAST CONTRACTS, TRANSACTIONS, NEGOTIATIONS AND AGREEMENTS.

               The Fund's  registration  statement  on Form N-2,  filed with the
U.S. Securities and Exchange Commission on March 31, 2005 (as it may be amended,
modified  or  otherwise  supplemented  from  time  to  time,  the  "Registration
Statement"),  and the Partnership Agreement,  each of which was provided to each
Partner in advance  of  subscribing  for  Interests,  provide  that the Board of
Directors  has the  discretion  to  determine  whether  the Fund  will  purchase
Interests from Partners from time to time pursuant to written tenders,  and that
one of the  factors  the  Board  of  Directors  will  consider  in  making  such
determination is the  recommendations  of the General Partner and the Investment
Manager. The Registration Statement also states that the General Partner and the
Investment  Manager  expect that they will  recommend  to the Board of Directors
that the Fund offer to repurchase  Interests from Partners  quarterly each year.
The Fund  commenced  operations  on January  3, 2005 and has made five  previous
offers to purchase Interests from Partners since inception.

                                       7


               The Fund is not aware of any contract, arrangement, understanding
or relationship relating,  directly or indirectly,  to the Offer (whether or not
legally enforceable)  between: (i) the Fund, the General Partner, the Investment
Manager or members of the Board of Directors or any person controlling the Fund,
the General Partner or the Investment  Manager;  and (ii) any other person, with
respect to the Interests.

ITEM 6.        PURPOSES OF THIS TENDER OFFER AND PLANS OR PROPOSALS.

               (a) The purpose of the Offer is to provide  liquidity to Partners
that hold  Interests,  as  contemplated by and in accordance with the procedures
set out in the Registration Statement and the Partnership Agreement.

               (b) Interests  that are tendered to the Fund in  connection  with
the Offer will be retired,  although the Fund may issue  Interests  from time to
time in transactions  not involving any public offering,  conducted  pursuant to
Rule 506 of  Regulation  D under the  Securities  Act of 1933,  as  amended,  in
accordance with the Partnership  Agreement.  The Fund currently  expects that it
will accept  subscriptions  for Interests as of the first day of each month, but
is under no obligation to do so, and may do so more  frequently as determined by
the General Partner.

               (c) None of the Fund, the General Partner, the Investment Manager
or the Board of  Directors  or any  person  controlling  the Fund,  the  General
Partner or the  Investment  Manager has any plans or proposals that relate to or
would  result  in:  (1)  an  extraordinary   transaction,   such  as  a  merger,
reorganization  or  liquidation,  involving the Fund; (2) any purchase,  sale or
transfer of a material  amount of assets of the Fund; (3) any material change in
the present  distribution  policy or indebtedness or capitalization of the Fund;
(4) any change in the present  Board of  Directors or in the  management  of the
Fund including,  but not limited to, any plans or proposals to change the number
or the term of  members  of the  Board  of  Directors,  or to fill any  existing
vacancy  on the  Board  of  Directors  or to  change  any  material  term of the
employment  contract of any executive officer;  (5) any other material change in
the Fund's corporate structure or business,  including any plans or proposals to
make any changes in its investment policies,  for which a vote would be required
by Section 13 of the 1940 Act; (6) the  acquisition  by any person of additional
Interests (other than the Fund's intention to accept subscriptions for Interests
on the first day of each  month and from time to time in the  discretion  of the
General  Partner),  or the disposition of Interests (other than through periodic
purchase  offers,  including the Offer);  or (7) any changes in the  Partnership
Agreement or other governing  instruments or other actions that could impede the
acquisition  of control  of the Fund.  Because  Interests  are not traded in any
market,  Subsections (6), (7) and (8) of Regulation M-A ss.  229.1006(c) are not
applicable to the Fund.

ITEM 7.        SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

               (a) The Fund expects that the amount  offered for the purchase of
Interests  pursuant to the Offer,  which will not exceed  $20,000,000 of the net
assets of the Fund  (unless  the Fund  elects to  purchase  a greater  amount as
described in Item  4(a)(1)(ix)),  will be paid from one or more of the following
sources:  cash on hand,  proceeds from the sale of securities  held by the Fund,
withdrawal  proceeds  from  investment  funds in  which  the  Fund  invests,  or
borrowings  (as  described  in  paragraph  (d) below).  Upon its  acceptance  of
tendered Interests for repurchase,  the Fund will maintain daily, as an entry on
its books, a distinct account consisting of (1) cash, (2) liquid securities,  or
(3)  interests  in specific  investment  funds in which the Fund invests (or any
combination  of them),  in an amount  equal to the  aggregate  estimated  unpaid
dollar amount of any Note, as described above.

               (b) There are no  material  conditions  to the  financing  of the
transaction.  There are currently no alternative financing plans or arrangements
for the transaction.

                                       8


               (c) Not applicable.

               (d) None of the Fund, the General Partner, the Investment Manager
or the Board of  Directors  or any  person  controlling  the Fund,  the  General
Partner or the Investment Manager has determined at this time to borrow funds to
purchase  Interests  tendered in  connection  with the Offer.  Depending  on the
dollar amount of Interests  tendered and prevailing  general economic and market
conditions; the Fund, in its sole discretion, may decide to seek to borrow money
to fund all or a portion  of the  purchase  amount  for  Interests,  subject  to
compliance  with  applicable  law. The Fund  expects  that the  repayment of any
amounts borrowed will be financed from additional funds  contributed to the Fund
by existing or new Partners, from withdrawals of its capital from the investment
funds  in which it  invests,  or from  proceeds  of the sale of  securities  and
portfolio assets held by the Fund.

ITEM 8.        INTEREST IN SECURITIES OF THE ISSUER.

               (a) Not applicable.

               (b) Other than the acceptance of  subscriptions as of May 1, 2006
and June 1, 2006, there have been no transactions  involving Interests that were
effected  during  the  past  60 days  by the  Fund,  the  General  Partner,  the
Investment  Manager,  any  member  of the  Board  of  Directors  or  any  person
controlling the Fund, the General Partner or the Investment Manager.

ITEM 9.        PERSONS/ASSETS RETAINED, EMPLOYED, COMPENSATED OR USED.

               No persons have been directly or indirectly  employed or retained
or are to be compensated by the Fund to make solicitations or recommendations in
connection with the Offer.

ITEM 10.       FINANCIAL STATEMENTS.

               (a) (1)  The  Fund  commenced  operations  on  January  3,  2005.
Reference is made to (i) the audited financial  statements dated March 31, 2006,
which were filed with the  Securities  and Exchange  Commission on Form N-CSR on
June 9, 2006 and (ii) the unaudited  financial  statements  dated  September 30,
2005, which were filed with the Securities and Exchange Commission on Form N-CSR
on December 8, 2005.  Each filing is  incorporated  by reference in its entirety
for the purpose of filing this Schedule TO.

                   (2) The Fund is not  required to and does not file  quarterly
unaudited  financial  statements  under the Exchange Act. The Fund does not have
shares, and consequently does not have earnings per share information.

                   (3) Not applicable.

                   (4) The Fund does not have shares,  and consequently does not
have book value per share information.

               (b) The  Fund's  assets  will be  reduced  by the  amount  of the
tendered  Interests  that are purchased by the Fund.  Thus,  income  relative to
assets  may be  affected  by the  Offer.  The  Fund  does not  have  shares  and
consequently does not have earnings or book value per share information.

                                       9


ITEM 11.       ADDITIONAL INFORMATION.

               (a) (1) None.

                   (2) None.

                   (3) Not applicable.

                   (4) Not applicable.

                   (5) None.

               (b) None.


ITEM 12.       EXHIBITS.

               Reference  is  hereby  made  to  the  following  exhibits,  which
collectively  constitute  the Offer to Partners and are  incorporated  herein by
reference:

               A. Cover Letter to Offer to Purchase and Letter of Transmittal.

               B. Offer to Purchase.

               C. Form of Letter of Transmittal.

               D. Form of Notice of Withdrawal of Tender.

               E. Forms of Letters from the Fund to Partners in connection  with
                  the Fund's acceptance of tenders of Interests.

                                       10


                                    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


June 23, 2006

                                       11


                                  EXHIBIT INDEX

EXHIBITS

A        Cover Letter to Offer to Purchase and Letter of Transmittal.

B        Offer to Purchase.

C        Form of Letter of Transmittal.

D        Form of Notice of Withdrawal of Tender.

E        Forms of  Letters  from the Fund to  Partners  in  connection  with the
         Fund's acceptance of tenders of Interests.


                                    EXHIBIT A

           COVER LETTER TO OFFER TO PURCHASE AND LETTER OF TRANSMITTAL

   IF YOU DO NOT WANT TO SELL YOUR LIMITED PARTNERSHIP INTERESTS AT THIS TIME,
                       PLEASE DISREGARD THIS NOTICE. THIS
               IS SOLELY NOTIFICATION OF THE FUND'S TENDER OFFER.


June 23, 2006

Dear Hatteras Master Fund, L.P. Partner:

         We are writing to inform you of  important  dates  relating to a tender
offer by Hatteras Master Fund,  L.P. (the "Fund").  IF YOU ARE NOT INTERESTED IN
HAVING THE FUND  REPURCHASE  YOUR LIMITED  PARTNERSHIP  INTEREST OR A PORTION OF
YOUR INTEREST IN THE FUND  ("INTEREST")  VALUED AS OF SEPTEMBER 30, 2006, PLEASE
DISREGARD THIS NOTICE AND TAKE NO ACTION.

         The tender  offer  period  will begin on June 23,  2006 and will end at
12:00  midnight,  Eastern  Standard  Time,  on JULY 25, 2006, AT WHICH POINT THE
TENDER  OFFER  WILL  EXPIRE.  The  purpose  of the  tender  offer is to  provide
liquidity  to  Partners  of the  Fund  that  hold  Interests.  Interests  may be
presented  to the Fund for  purchase  only by  tendering  them during one of the
Fund's announced tender offers.

         Should you wish to tender your  Interest or a portion of your  Interest
for purchase by the Fund during this tender offer  period,  please  complete and
return the enclosed  Letter of  Transmittal  so that it is received by PFPC Inc.
("PFPC")  no later  than  JULY 25,  2006.  If you do not wish to have all or any
portion of your Interest repurchased, simply disregard this notice. NO ACTION IS
REQUIRED IF YOU DO NOT WISH TO HAVE ANY PORTION OF YOUR INTEREST REPURCHASED.

         If you would like to tender your Interest,  you should  complete,  sign
and either (i) mail (via certified mail, return receipt  requested) or otherwise
deliver the Letter of Transmittal to Hatteras  Master Fund,  L.P., c/o PFPC Inc.
at  P.O.  Box  219,   Claymont,   Delaware   19703,   Attention:   Tender  Offer
Administrator; or (ii) fax it to PFPC at (302) 791-2790, Attention: Tender Offer
Administrator  (if by fax,  please  deliver an original,  executed copy promptly
thereafter),  so that it is RECEIVED  BEFORE 12:00  MIDNIGHT,  EASTERN  STANDARD
TIME, ON JULY 25, 2006.

         If you have  any  questions,  please  refer  to the  enclosed  Offer to
Purchase document,  which contains  additional  important  information about the
tender offer, or call the Tender Offer Administrator at PFPC at (800) 348-1824.

Sincerely,

Hatteras Master Fund, L.P.


                                    EXHIBIT B

                                OFFER TO PURCHASE

                           HATTERAS MASTER FUND, L.P.
                               8816 Six Forks Road
                                    Suite 107
                          Raleigh, North Carolina 27615

                           OFFER TO PURCHASE INTERESTS
                               DATED JUNE 23, 2006

                         LETTERS OF TRANSMITTAL MUST BE
                              RECEIVED BY PFPC INC.
                                BY JULY 25, 2006.

                 THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT
            12:00 MIDNIGHT, EASTERN STANDARD TIME, ON JULY 25, 2006,
                          UNLESS THE OFFER IS EXTENDED


To the Partners of
Hatteras Master Fund, L.P.:

         Hatteras Master Fund, L.P., a closed-end,  non-diversified,  management
investment company organized as a Delaware limited  partnership (the "Fund"), is
offering to purchase for cash on the terms and  conditions set out in this offer
to purchase  (this "Offer to Purchase")  and the related  Letter of  Transmittal
(which, together with this Offer to Purchase, constitutes the "Offer") an amount
of Interests or portions of Interests up to $20,000,000 of the net assets of the
Fund.  The Offer is being  made  pursuant  to tenders  by  partners  of the Fund
("Partners")  at a price equal to the net asset value of the tendered  Interests
as of September 30, 2006 (or at a later date determined by the Fund if the Offer
is extended) (in each case, the "Repurchase  Date").  As used in the Offer,  the
term "Interest" or "Interests"  refers to the limited  partnership  interests in
the Fund representing  beneficial interests in the Fund, and includes all or any
portion of a Partner's Interest as the context requires. Partners that desire to
tender an Interest for purchase must do so by 12:00 midnight,  Eastern  Standard
Time on July 25, 2006 (the "Initial Notice Due Date"),  subject to any extension
of the Offer made in the absolute  discretion  of the Fund's Board of Directors.
The later of the  Initial  Notice Due Date or the latest  time and date that the
Fund  designates as the deadline for Partners to tender an Interest for purchase
is called the "Notice Due Date" and is the date upon which the Offer expires. If
the Fund  elects  to  extend  the  tender  period,  the net  asset  value of the
Interests tendered for purchase will be determined at the close of business on a
day determined by the Fund and notified to the Partners. The Offer is being made
to all Partners and is not  conditioned on any minimum amount of Interests being
tendered,  but is subject to certain conditions  described below.  Interests are
not  traded  on any  established  trading  market  and  are  subject  to  strict
restrictions  on  transferability  pursuant to the Fund's  Amended and  Restated
Agreement  of  Limited  Partnership  dated  as of March  31,  2005 (as it may be
amended,  modified or otherwise supplemented from time to time, the "Partnership
Agreement").

         Partners should realize that the value of the Interests tendered in the
Offer likely will change between May 31, 2006 (the last time net asset value was
calculated) and the Repurchase Date when the value of the Interests  tendered to
the Fund for purchase will be  determined.  Partners  tendering  their  Interest
should also note that they will remain Partners in the Fund, with respect to the
Interest tendered and accepted for purchase by the Fund,  through the Repurchase
Date,  when the net asset value of their Interest is  calculated.  Any tendering
Partners that wish to obtain the  estimated  net asset value of their  Interests
should  contact  the  Tender  Offer  Administrator  at  PFPC  Inc.,  the  Fund's
Administrator, at (800) 348-1824 or at Hatteras Master Fund, L.P., c/o PFPC Inc.
at  P.O.  Box  219,   Claymont,   Delaware   19703,   Attention:   Tender  Offer
Administrator,  Monday through Friday,  except holidays,  during normal business
hours of 9:00 a.m. to 5:00 p.m. (Eastern Standard Time).


         Partners  desiring  to tender all or any  portion of their  Interest in
accordance  with the terms of the Offer  should  complete  and sign the enclosed
Letter of Transmittal  and send or deliver it to PFPC Inc. in the manner set out
below.

                                    IMPORTANT

         NONE OF THE FUND,  HATTERAS  INVESTMENT  MANAGEMENT  LLC (THE  "GENERAL
PARTNER"),  HATTERAS INVESTMENT  PARTNERS LLC (THE "INVESTMENT  MANAGER") OR THE
FUND'S BOARD OF DIRECTORS  MAKES ANY  RECOMMENDATION  TO ANY PARTNER  WHETHER TO
TENDER OR  REFRAIN  FROM  TENDERING  INTERESTS.  PARTNERS  MUST  MAKE  THEIR OWN
DECISIONS WHETHER TO TENDER INTERESTS, AND, IF THEY CHOOSE TO DO SO, THE PORTION
OF THEIR INTERESTS TO TENDER.

         BECAUSE EACH PARTNER'S  INVESTMENT DECISION IS A PERSONAL ONE, BASED ON
FINANCIAL   CIRCUMSTANCES,   NO  PERSON   HAS  BEEN   AUTHORIZED   TO  MAKE  ANY
RECOMMENDATION  ON  BEHALF  OF THE FUND AS TO  WHETHER  PARTNERS  SHOULD  TENDER
INTERESTS  PURSUANT  TO THE  OFFER.  NO PERSON HAS BEEN  AUTHORIZED  TO GIVE ANY
INFORMATION OR TO MAKE ANY  REPRESENTATIONS  IN CONNECTION  WITH THE OFFER OTHER
THAN THOSE CONTAINED  HEREIN OR IN THE LETTER OF TRANSMITTAL.  IF GIVEN OR MADE,
SUCH RECOMMENDATION AND SUCH INFORMATION AND REPRESENTATIONS  MUST NOT BE RELIED
ON AS HAVING  BEEN  AUTHORIZED  BY THE FUND,  THE FUND'S  GENERAL  PARTNER,  THE
INVESTMENT MANAGER, OR ITS BOARD OF DIRECTORS.

         THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
AND EXCHANGE  COMMISSION NOR HAS THE  SECURITIES AND EXCHANGE  COMMISSION OR ANY
STATE SECURITIES COMMISSION PASSED ON THE FAIRNESS OR MERITS OF SUCH TRANSACTION
OR ON THE ACCURACY OR ADEQUACY OF THE  INFORMATION  CONTAINED IN THIS  DOCUMENT.
ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.

         Questions  and requests  for  assistance  and  requests for  additional
copies of the Offer may be directed to:

                           Hatteras Master Fund, L.P.
                                  c/o PFPC Inc.
                                  P.O. Box 219
                               Claymont, DE 19703
                      Attention: Tender Offer Administrator
                              Phone: (800) 348-1824
                               Fax: (302) 791-2790

                                      (ii)


                                TABLE OF CONTENTS

1.   Summary Term Sheet.......................................................1
2.   Background and Purpose of the Offer......................................2
3.   Offer to Purchase and Price..............................................3
4.   Amount of Tender.........................................................3
5.   Procedure for Tenders....................................................4
6.   Withdrawal Rights........................................................4
7.   Purchases and Payment....................................................5
8.   Certain Conditions of the Offer..........................................5
9.   Certain Information About the Fund.......................................6
10.  Certain Federal Income Tax Consequences..................................7
11.  Miscellaneous............................................................7

                                     (iii)


1.       SUMMARY TERM SHEET

         This Summary Term Sheet highlights certain  information  concerning the
Offer.  To understand the Offer fully and for a more complete  discussion of the
terms and  conditions of the Offer,  please read  carefully this entire Offer to
Purchase and the related Letter of Transmittal.  Section  references are to this
Offer to Purchase.

o        The Fund (referred to as "we" or the "Fund" in this Summary Term Sheet)
         is offering to purchase Interests in an amount up to $20,000,000 of the
         net assets of the Fund. We will  purchase  your  Interests at their net
         asset value (that is, the value of the Fund's  total  assets  minus its
         total liabilities,  including accrued fees and expenses,  multiplied by
         the  proportionate  interest  in the Fund you desire to  tender,  after
         giving effect to all allocations,  including any incentive  allocation)
         calculated as of the Repurchase  Date. The net asset value of Interests
         will be calculated for this purpose as of September 30, 2006 or, if the
         Offer is  extended,  as of any later  Repurchase  Date.  The Offer will
         remain open until 12:00  midnight,  Eastern  Standard Time, on July 25,
         2006 (or if the Offer is extended, until any later Notice Due Date), at
         which time the Offer is scheduled to expire.

o        The Fund reserves the right to adjust the Repurchase Date to correspond
         with any  extension  of the Offer.  The Fund will  review the net asset
         value  calculation  of the  Interests  during the Fund's  audit for the
         fiscal year ending on March 31,  2007,  which the Fund  expects will be
         completed  within 60 days of the  fiscal  year-end,  and that net asset
         value will be used to  determine  the final  amount  paid for  tendered
         Interests. Because the Fund's current fiscal year will end on March 31,
         2007,  the Fund  expects that the audit will be completed by the end of
         May 2007.

o        A Partner may tender its entire  Interest or a portion of its Interest.
         See Section 4.

o        If you tender your  Interest  and we purchase  that  Interest,  we will
         issue you a non-interest bearing, non-transferable promissory note (the
         "Note")  entitling you to an amount equal to the net asset value of the
         Interest tendered (valued in accordance with the Partnership Agreement)
         determined as of September  30, 2006 (or if the Offer is extended,  the
         net asset value determined on the Repurchase Date).

o        The  Note  will  entitle  you to an  initial  payment  in cash  (valued
         according to the Partnership  Agreement) equal to at least 90% (100% in
         the case of a Partner  tendering less than its entire  Interest) of the
         unaudited net asset value of the Interest (the "Initial Payment").  The
         Fund  may  take up to 90 days  after  the  Repurchase  Date to make the
         Initial Payment.

o        In the case of a Partner  tendering its entire Interest,  the Note will
         also  entitle  the  Partner  to  receive  a  contingent   payment  (the
         "Post-Audit Payment") equal to the excess, if any, of (1) the net asset
         value of the Interest  tendered and purchased as of the Repurchase Date
         (as it may be adjusted  based upon the next annual  audit of the Fund's
         financial  statements),  OVER (2) the Initial  Payment.  The Post-Audit
         Payment will be payable  promptly  after the  completion  of the Fund's
         next  annual  audit.  The Note will be held by PFPC Inc.  (referred  to
         herein as "PFPC" or the "Administrator") on your behalf. Upon a written
         request by you to PFPC,  PFPC will mail the Note to you at the  address
         for you as maintained in the books and records of the Fund. See Section
         7.

o        If we accept the tender of your Interest,  we will pay you the proceeds
         from one or more of the following sources:  cash on hand, proceeds from
         the sale of  securities  held by the  Fund,  withdrawal  proceeds  from
         investment funds in which the Fund invests, or borrowings. The purchase
         amount will be paid entirely in cash. See Section 7.


o        If you desire to tender an  Interest  for  purchase,  you must do so by
         12:00  midnight,  Eastern  Standard  Time,  on July 25, 2006 (or if the
         Offer is  extended,  by any later  Notice Due Date),  at which time the
         Offer is  scheduled to expire.  Until that time,  you have the right to
         change your mind and withdraw any tenders of your  Interest.  Interests
         withdrawn may be re-tendered,  however,  provided that such tenders are
         made  before  the Notice Due Date by  following  the tender  procedures
         described  herein.  If the Fund has not yet accepted  your tender of an
         Interest  on or prior to August 21,  2006  (I.E.,  the date 40 business
         days from the commencement of the Offer),  you will also have the right
         to withdraw the tender of your Interest after such date. See Section 6.

o        If you would like us to purchase your  Interest,  you should  complete,
         sign and either (i) mail (via certified mail, return receipt requested)
         or  otherwise  deliver  the Letter of  Transmittal,  enclosed  with the
         Offer,  to Hatteras  Master Fund,  L.P.,  c/o PFPC Inc.,  P.O. Box 219,
         Claymont, DE 19703, Attention: Tender Offer Administrator;  or (ii) fax
         it to PFPC at (302) 791-2790, Attention: Tender Offer Administrator, so
         that it is received  before 12:00 midnight,  Eastern  Standard Time, on
         July 25, 2006. IF YOU CHOOSE TO FAX THE LETTER OF TRANSMITTAL, YOU MUST
         MAIL THE ORIGINAL  LETTER OF TRANSMITTAL TO PFPC PROMPTLY AFTER YOU FAX
         IT (ALTHOUGH  THE ORIGINAL,  IF FAXED,  DOES NOT HAVE TO BE RECEIVED BY
         MAIL BEFORE 12:00 MIDNIGHT,  EASTERN  STANDARD TIME, ON JULY 25, 2006).
         See Section 5. The value of your  Interests may change  between May 31,
         2006 (the last time net asset value was  calculated) and the Repurchase
         Date  when  the  value  of  the  Interests   being  purchased  will  be
         determined. See Section 3.

o        As of May 31, 2006,  the net asset value of the Fund was  $249,225,601.
         If you  would  like to obtain  the  estimated  net asset  value of your
         Interest,  which  we  calculate  from  time to  time,  based  upon  the
         information  we receive  from the managers of the  investment  funds in
         which we invest, you may contact the Tender Offer Administrator at PFPC
         at (800)  348-1824  or at the  address  listed on the cover page of the
         Letter of Transmittal,  Monday through Friday, except holidays,  during
         normal  business  hours of 9:00  a.m.  to 5:00 p.m.  (Eastern  Standard
         Time). See Section 3.

2.       BACKGROUND AND PURPOSE OF THE OFFER.

         The purpose of the Offer is to provide  liquidity to the Partners  that
hold  Interests  in the Fund,  as  contemplated  by and in  accordance  with the
procedures set out in the Fund's  registration  statement on Form N-2 (as it may
be  amended,   modified  or  otherwise  supplemented  from  time  to  time,  the
"Registration  Statement"),  and the  Partnership  Agreement.  The  Registration
Statement and the Partnership  Agreement  provide that the board of directors of
the Fund (the "Board of Directors") has the discretion to determine  whether the
Fund will purchase Interests from time to time from Partners pursuant to written
tenders,  and that one of the factors the Board of  Directors  will  consider in
making such determination is the  recommendations of the General Partner and the
Investment  Manager.  The  Registration  Statement  also states that the General
Partner of the Fund and the  Investment  Manager expect that they will recommend
to the Board of  Directors  that the Fund  offer to  repurchase  Interests  from
Partners  quarterly each year. The Fund commenced  operations on January 3, 2005
and has made five previous  offers to purchase  Interests  from  Partners  since
inception.

         Because  there  is  no  secondary  trading  market  for  Interests  and
transfers of Interests  are  prohibited  without  prior  approval of the General
Partner,  the Board of Directors  has  determined  to cause the Fund to make the
Offer,  after  consideration  of various  matters,  including but not limited to
those set out in the  Registration  Statement and the Partnership  Agreement and
the recommendations of the General Partner and the Investment Manager. While the
General  Partner and the Investment  Manager intend to recommend to the Board of
Directors that the Fund offer to repurchase Interests, or portions of them, on a
quarterly  basis each year,  the Board of  Directors is under no  obligation  to
follow such recommendations.

                                       2


         The purchase of Interests pursuant to the Offer will have the effect of
increasing the proportionate interest in the Fund of Partners that do not tender
Interests.  Partners  that retain  their  Interests  may be subject to increased
risks due to the reduction in the Fund's aggregate assets resulting from payment
for the  Interests  tendered.  These  risks  include the  potential  for greater
volatility due to decreased  diversification.  The Fund believes;  however, that
this result is unlikely  given the nature of the Fund's  investment  program.  A
reduction in the aggregate assets of the Fund may result in Partners that do not
tender Interests  bearing higher costs to the extent that certain expenses borne
by the Fund are relatively  fixed and may not decrease if assets decline.  These
effects may be reduced or eliminated to the extent that additional subscriptions
for Interests are made by new and existing  Partners from time to time.  Payment
for  Interests  purchased  pursuant  to the Offer may also  require  the Fund to
liquidate portfolio holdings earlier than the Investment Manager would otherwise
have caused these holdings to be liquidated,  potentially resulting in losses or
increased investment related expenses.

         Interests  that are tendered to the Fund in  connection  with the Offer
will be  retired,  although  the Fund may issue  Interests  from time to time in
transactions not involving any public offering,  conducted  pursuant to Rule 506
of Regulation D under the Securities Act of 1933, as amended, in accordance with
the  Registration  Statement.  The Fund  currently  expects  that it will accept
subscriptions  for Interests as of the first day of each month,  but is under no
obligation to do so, and may do so more  frequently as determined by the General
Partner.

         The  tender of an  Interest  by a Partner  will not  affect  the record
ownership  of  such  Partner  for  purposes  of  voting  or  entitlement  to any
distributions  payable by the Fund unless and until such  Interest is purchased.
You should also realize  that  although the Offer is scheduled to expire on July
25, 2006 (unless it is extended),  you remain a Partner of the Fund with respect
to the Interest  you tendered  that is accepted for purchase by the Fund through
the Repurchase Date.

3.       OFFER TO PURCHASE AND PRICE.

         The Fund will, on the terms and subject to the conditions of the Offer,
purchase an amount of Interests up to  $20,000,000 of the net assets of the Fund
that are tendered by Partners by 12:00 midnight,  Eastern Standard Time, on July
25, 2006 (or if the Offer is extended,  by any later  Notice Due Date),  and not
withdrawn  (as  provided in Section 6 below)  prior to the Notice Due Date.  The
Fund  reserves  the right to extend,  amend or cancel the Offer as  described in
Sections 4 and 8 below. The value of the Interests tendered for purchase will be
their net asset value as of September 30, 2006 or, if the Offer is extended,  as
of any later Repurchase Date, payable as set out in Section 7. The determination
of the net asset  value of  Interests  as of the  Repurchase  Date is subject to
adjustment  based  upon the  results  of the  next  annual  audit of the  Fund's
financial statements.

4.       AMOUNT OF TENDER.

         Subject  to the  limitations  set out below,  a Partner  may tender its
entire  Interest  or a portion of its  Interest.  The Offer is being made to all
Partners of the Fund and is not  conditioned  on any minimum amount of Interests
being tendered.

         If the amount of Interests that are properly  tendered  pursuant to the
Offer and not  withdrawn  pursuant  to  Section 6 below is less than or equal to
$20,000,000  of the net assets of the Fund (or such  greater  amount as the Fund
may elect to purchase  pursuant to the Offer),  the Fund will,  on the terms and
subject  to the  conditions  of the  Offer,  purchase  all of the  Interests  so
tendered  unless  the Fund  elects to cancel or amend  the  Offer,  or  postpone
acceptance  of tenders  made  pursuant  to the Offer,  as  provided in Section 8
below.  If Interests in excess of  $20,000,000 of the net assets of the Fund are
duly tendered to the Fund prior to the Notice Due Date and not  withdrawn  prior
to the Notice Due Date  pursuant  to Section 6 below,  the Fund will in its sole
discretion either (a) accept the additional  Interests  permitted to be accepted
pursuant to Rule  13e-4(f)(3)  under the  Securities  Exchange  Act of 1934,  as
amended (the "Exchange Act");  (b) extend the Offer, if necessary,  and increase
the amount of  Interests  that the Fund is  offering to purchase to an amount it
believes  sufficient to accommodate the excess Interests tendered as well as any
Interests  tendered during the extended Offer; or (c) accept Interests  tendered
prior to the Notice Due Date and not withdrawn  prior to the Notice Due Date for
payment on a pro rata basis based on the  aggregate  net asset value of tendered
Interests. The Offer may be extended, amended or canceled in other circumstances
described in Section 8 below.

                                       3


5.       PROCEDURE FOR TENDERS.

         Partners wishing to tender Interests pursuant to this Offer to Purchase
should  send or deliver by July 25,  2006 (or if the Offer is  extended,  by any
later Notice Due Date) a completed and executed  Letter of  Transmittal to PFPC,
to the  attention of the Tender Offer  Administrator,  at the address set out on
the first page of the Letter of  Transmittal,  or fax a completed  and  executed
Letter  of  Transmittal  to PFPC,  also to the  attention  of the  Tender  Offer
Administrator,  at the fax  number  set out on the first  page of the  Letter of
Transmittal.  The completed and executed Letter of Transmittal  must be received
by  PFPC,  either  by mail or by fax,  no later  than  12:00  midnight,  Eastern
Standard Time, on July 25, 2006 (or if the Offer is extended,  no later than any
later Notice Due Date).

         The  Fund  recommends  that  all  documents  be  submitted  to PFPC via
certified  mail,  return  receipt  requested,  or by facsimile  transmission.  A
Partner  choosing  to fax a Letter  of  Transmittal  to PFPC  must  also send or
deliver the  original  completed  and  executed  Letter of  Transmittal  to PFPC
promptly  thereafter.  Partners  wishing  to  confirm  receipt  of a  Letter  of
Transmittal  may contact PFPC at the address or telephone  number set out on the
first page of the Letter of Transmittal. The method of delivery of any documents
is at the  election  and  complete  risk of the Partner  tendering  an Interest,
including,  but not  limited  to, the  failure of PFPC to receive  any Letter of
Transmittal or other document submitted by facsimile transmission. All questions
as to the validity, form, eligibility (including time of receipt) and acceptance
of tenders will be  determined  by the Fund,  in its sole  discretion,  and such
determination will be final and binding. The Fund reserves the absolute right to
reject any or all tenders  determined by it not to be in appropriate form or the
acceptance  of or payment  for which  would,  in the  opinion of counsel for the
Fund, be unlawful. The Fund also reserves the absolute right to waive any of the
conditions  of the  Offer  or any  defect  in any  tender  with  respect  to any
particular Interest or any particular Partner, and the Fund's  interpretation of
the terms and conditions of the Offer will be final and binding.  Unless waived,
any defects or  irregularities  in connection  with tenders must be cured within
such time as the Fund will  determine.  Tenders  will not be deemed to have been
made until the defects or irregularities  have been cured or waived. None of the
Fund, the General Partner, the Investment Manager or the Board of Directors will
be obligated  to give notice of any defects or  irregularities  in tenders,  nor
will any of them incur any liability for failure to give such notice.

6.       WITHDRAWAL RIGHTS.

         Until the  Notice  Due Date,  Partners  have the right to change  their
minds and withdraw any tenders of their  Interests.  Interests  withdrawn may be
re-tendered, however, provided that such tenders are made before the Notice Date
by following  the tender  procedures  described  in Section 5.  Pursuant to Rule
13e-4(f)(2)(ii)  of the  Exchange  Act,  if the  Fund  has  not yet  accepted  a
Partner's  tender of an Interest on or prior to August 21, 2006 (I.E.,  the date
40 business days from the  commencement of the Offer),  a Partner will also have
the right to  withdraw  its  tender  of its  Interest  after  such  date.  To be
effective,  any  notice of  withdrawal  must be timely  received  by PFPC at the
address or fax  number  set out on the first page of the Letter of  Transmittal.
All questions as to the form and validity (including time of receipt) of notices
of withdrawal will be determined by the Fund, in its sole  discretion,  and such
determination  will be  final  and  binding.  A  tender  of  Interests  properly
withdrawn  will not  thereafter  be deemed to be  tendered  for  purposes of the
Offer.

                                       4


7.       PURCHASES AND PAYMENT.

         For  purposes  of the Offer,  the Fund will be deemed to have  accepted
Interests that are tendered if and when it gives written notice to the tendering
Partner of its election to purchase such Interest. As stated in Section 3 above,
the amount offered for the Interests  tendered by Partners will be the net asset
value thereof as of September  30, 2006, or if the Offer is extended,  as of any
later  Repurchase  Date.  The net  asset  value  will be  determined  after  all
allocations  to capital  accounts  of the  Partners  required  to be made by the
Partnership  Agreement  have been made,  including any Repurchase Fee due to the
Fund in connection  with the repurchase and any incentive  allocation.  The Fund
will not pay interest on the purchase amount.

         For Partners  that tender  Interests  that are  accepted for  purchase,
payment of the purchase amount will consist of the Note, a  non-interest-bearing
non-transferable  promissory  note. The Note will entitle the Partner to receive
the  Initial  Payment in an amount  equal to at least 90% (100% in the case of a
Partner  tendering  less than its entire  Interest) of the  unaudited  net asset
value of the Interest tendered and accepted for purchase by the Fund, determined
as of the Repurchase  Date. The Fund may take up to 90 days after the Repurchase
Date to make the Initial Payment.  In the case of a Partner tendering all of its
Interests,  the Note will also  entitle  the  Partner  to  receive a  contingent
payment (the "Post-Audit  Payment") equal to the excess,  if any, of (1) the net
asset value of the Interest tendered and purchased as of the Repurchase Date (as
it may be  adjusted  based upon the next  annual  audit of the Fund's  financial
statements),  OVER (2) the  Initial  Payment.  The  Post-Audit  Payment  will be
payable  promptly  after the  completion of the Fund's next annual audit.  It is
anticipated  that the annual audit of the Fund's  financial  statements  will be
completed no later than 60 days after the fiscal year-end of the Fund.

         The Note pursuant to which a tendering Partner will receive the Initial
Payment and, if applicable,  Post-Audit Payment  (together,  the "Cash Payment")
will be held by PFPC on behalf of the tendering Partner.  Upon a written request
by a Partner to PFPC,  PFPC will mail the Note to the  Partner at the address of
the Partner as maintained in the books and records of the Fund. Any Cash Payment
due pursuant to the Note will be made by wire transfer directly to the tendering
Partner to an account designated by the Partner in the Letter of Transmittal.

         The Fund will make payment for  Interests it purchases  pursuant to the
Offer from one or more of the following sources: cash on hand, proceeds from the
sale of securities held by the Fund,  withdrawal  proceeds from investment funds
in which the Fund  invests,  or  borrowings.  Upon its  acceptance  of  tendered
Interests  for  repurchase,  the Fund will  maintain  daily,  as an entry on its
books, a distinct account consisting of (1) cash, (2) liquid securities,  or (3)
interests  in  specific  investment  funds in which  the  Fund  invests  (or any
combination  of them),  in an amount  equal to the  aggregate  estimated  unpaid
dollar amount of any Note, as described  above.  None of the Fund,  the Board of
Directors,  the General  Partner,  or the Investment  Manager have determined at
this time to borrow funds to purchase  Interests tendered in connection with the
Offer.  However,  depending  on the  dollar  amount of  Interests  tendered  and
prevailing  general  economic  and  market  conditions,  the  Fund,  in its sole
discretion,  may  decide  to fund any  portion  of the  amount  offered  for the
purchase of  Interests,  subject to  compliance  with  applicable  law,  through
borrowings.  The Fund expects that the repayment of any amounts so borrowed will
be financed from additional funds contributed to the Fund by existing and/or new
Partners, withdrawal of capital from the investment funds in which it invests or
from the proceeds of the sale of securities held by the Fund.

         The purchase amount will be paid entirely in cash.

8.       CERTAIN CONDITIONS OF THE OFFER.

         In the absolute discretion of the Board of Directors, the Fund reserves
the  right,  at any time and from  time to time,  to extend  the  period of time
during which the Offer is pending by notifying  Partners of such  extension.  In
the event that the Fund elects to extend the tender period,  the net asset value
of the  Interests  tendered  for  purchase  will be  determined  as of the later
Repurchase Date. During any such extension,  all Interests  previously  tendered
and not withdrawn will remain  subject to the Offer.  The Fund also reserves the
right  at any  time  and from  time to time up to and  including  acceptance  of
tenders pursuant to the Offer: (a) to cancel the Offer in the  circumstances set
out in the  following  paragraph  and in the event of such  cancellation  not to
purchase or pay for any Interests  tendered  pursuant to the Offer; (b) to amend
the  Offer;  and (c) to  postpone  the  acceptance  of  Interests.  If the  Fund
determines  to amend  the  Offer or to  postpone  the  acceptance  of  Interests
tendered,  it will,  to the extent  necessary,  extend the period of time during
which the Offer is open as provided above and will promptly notify Partners.

                                       5


         The Fund may  cancel  the  Offer,  amend  the  Offer  or  postpone  the
acceptance  of tenders made  pursuant to the Offer if: (a) the Fund would not be
able  to  liquidate  portfolio  securities  in a  manner  that  is  orderly  and
consistent  with the  Fund's  investment  objectives  and  policies  in order to
purchase Interests tendered pursuant to the Offer; (b) there is, in the judgment
of the Board of  Directors,  any (i) legal action or  proceeding  instituted  or
threatened challenging the Offer or otherwise materially adversely affecting the
Fund, (ii) declaration of a banking  moratorium by federal or state  authorities
or any  suspension  of payment  by banks in the United  States or New York State
that is  material  to the Fund,  (iii)  limitation  imposed  by federal or state
authorities on the extension of credit by lending institutions,  (iv) suspension
of trading on any organized exchange or  over-the-counter  market where the Fund
has a material  investment,  (v) commencement of war, armed hostilities or other
international or national calamity  directly or indirectly  involving the United
States  that is material to the Fund,  (vi)  material  decrease in the net asset
value of the Fund from the net asset value of the Fund as of the commencement of
the Offer, or (vii) other event or condition that would have a material  adverse
effect on the Fund or its Partners if Interests  tendered  pursuant to the Offer
were purchased; (c) the Board of Directors determines that it is not in the best
interest of the Fund to purchase Interests pursuant to the Offer; or (d) for any
other periods that the Securities and Exchange Commission (the "SEC") permits by
order for the protection of Partners.

9.       CERTAIN INFORMATION ABOUT THE FUND.

         The Fund is  registered  under the  Investment  Company Act of 1940, as
amended  (the  "1940  Act"),  as  a  closed-end,   non-diversified,   management
investment  company.  It  is  organized  as  a  Delaware  limited   partnership.
Subscriptions for Interests of the Fund were first accepted for investment as of
January 3, 2005.  The principal  office of the Fund is located at 8816 Six Forks
Road, Suite 107, Raleigh, North Carolina 27615 and the telephone number is (919)
846-2324.  Interests are not traded on any  established  trading  market and are
subject to strict  restrictions on  transferability  pursuant to the Partnership
Agreement.

         None of the Fund, the General  Partner,  the Investment  Manager or the
Board of Directors has any plans or proposals that relate to or would result in:
(1)  an  extraordinary  transaction,   such  as  a  merger,   reorganization  or
liquidation,  involving  the  Fund;  (2) any  purchase,  sale or  transfer  of a
material  amount of assets of the Fund;  (3) any material  change in the present
distribution  policy or  indebtedness  or  capitalization  of the Fund;  (4) any
change  in the  present  Board of  Directors  or in the  management  of the Fund
including,  but not limited to, any plans or  proposals  to change the number or
the term of members of the Board of Directors,  or to fill any existing  vacancy
on the Board of  Directors  or to change  any  material  term of the  employment
contract of any executive  officer;  (5) any other material change in the Fund's
corporate  structure or business,  including  any plans or proposals to make any
changes  in its  investment  policies,  for which a vote  would be  required  by
Section 13 of the 1940 Act;  (6) the  acquisition  by any  person of  additional
Interests (other than the Fund's intention to accept subscriptions for Interests
on the first day of each  month and from time to time in the  discretion  of the
General  Partner),  or the disposition of Interests (other than through periodic
purchase  offers,  including the Offer);  or (7) any changes in the  Partnership
Agreement or other governing  instruments or other actions that could impede the
acquisition of control of the Fund.

                                       6


         Other than the acceptance of  subscriptions  as of May 1, 2006 and June
1, 2006, there have been no transactions  involving Interests that were effected
during  the  past 60 days by the  Fund,  the  General  Partner,  the  Investment
Manager,  any member of the Board of  Directors  or any person  controlling  the
Fund, the General Partner or the Investment Manager.

10.      CERTAIN FEDERAL INCOME TAX CONSEQUENCES.

         The following discussion is a general summary of the federal income tax
consequences  of the purchase of Interests by the Fund for cash  pursuant to the
Offer. Partners should consult their own tax advisors for a complete description
of the tax  consequences  to them of a purchase of their  Interests  by the Fund
pursuant to the Offer.

         A Partner who sells all or part of the  Partner's  Interest to the Fund
will  generally  recognize  income or gain only to the extent the amount of cash
received  by the  Partner  exceeds  the  Partner's  adjusted  tax  basis  in the
Partner's entire Interest at that time. The Partner's  adjusted tax basis in the
Partner's  Interest  will be reduced by the amount of any cash  received  by the
Partner  from the  Fund,  and any  excess of that  cash  over  that  basis  will
generally constitute capital gain for the Partner. It is possible, however, that
Partners  might  recognize  some  ordinary  income by reason of the sale,  under
certain  technical  rules  that apply to the  extent a partner  disposes  of the
partner's  share of  "unrealized  receivables"  of a partnership  (as defined in
Internal  Revenue Code section  751). No loss will be recognized by a Partner on
such a sale to the Fund,  except that a Partner who sells the  Partner's  entire
Interest  to  the  Fund  may  recognize  a  capital  loss  at  the  time  of the
determination  of the  Post-Audit  Payment  to the  extent  the  aggregate  cash
received, and to be received, by the Partner is less than the Partner's adjusted
tax basis in the Interest.

11.      MISCELLANEOUS.

         The Offer is not being made to,  nor will  tenders  be  accepted  from,
Partners  in any  jurisdiction  in which the Offer or its  acceptance  would not
comply with the securities or other laws of such  jurisdiction.  The Fund is not
aware of any  jurisdiction in which the Offer or tenders  pursuant thereto would
not be in  compliance  with the  laws of such  jurisdiction.  However,  the Fund
reserves the right to exclude  Partners  from the Offer in any  jurisdiction  in
which it is asserted that the Offer cannot  lawfully be made.  The Fund believes
such exclusion is permissible  under applicable laws and  regulations,  provided
the Fund  makes a good  faith  effort  to  comply  with  any  state  law  deemed
applicable to the Offer.

         The Fund has filed an Issuer Tender Offer Statement on Schedule TO with
the SEC, which includes certain  information  relating to the Offer. A free copy
of  such  statement  may be  obtained  by  contacting  PFPC at the  address  and
telephone  number set out on the first page of the Letter of Transmittal or from
the SEC's  internet web site,  http://www.sec.gov.  A copy may be inspected  and
copied at, and,  for a fee, may be obtained by mail from,  the public  reference
office of the SEC at 450 Fifth Street, N.W., Washington, DC 20549.

                                       7


                                    EXHIBIT C

                              LETTER OF TRANSMITTAL

                             Regarding Interests in

                           HATTERAS MASTER FUND, L.P.

                   Tendered Pursuant to the Offer to Purchase
                               Dated June 23, 2006


                       THIS LETTER OF TRANSMITTAL MUST BE
                              RECEIVED BY PFPC INC.
                                BY JULY 25, 2006.


                   THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE
           AT 12:00 MIDNIGHT, EASTERN STANDARD TIME, ON JULY 25, 2006,
                          UNLESS THE OFFER IS EXTENDED.


               Complete This Letter Of Transmittal And Return To:

                           Hatteras Master Fund, L.P.
                                  c/o PFPC Inc.
                                  P.O. Box 219
                               Claymont, DE 19703

                      Attention: Tender Offer Administrator
                              Phone: (800) 348-1824
                               Fax: (302) 791-2790


Ladies and Gentlemen:

         The  undersigned  hereby  tenders to  Hatteras  Master  Fund,  L.P.,  a
closed-end,  non-diversified,  management  investment  company  organized  as  a
limited  partnership  under the laws of the State of Delaware (the "Fund"),  the
limited  partnership  interest in the Fund or portion  thereof (the  "Interest")
held by the  undersigned,  described  and  specified  below,  on the  terms  and
conditions set out in the Offer to Purchase,  dated June 23, 2006 (the "Offer"),
receipt of which is hereby acknowledged,  and in this Letter of Transmittal. THE
OFFER AND THIS LETTER OF TRANSMITTAL ARE SUBJECT TO ALL THE TERMS AND CONDITIONS
SET OUT IN THE OFFER,  INCLUDING,  BUT NOT LIMITED TO, THE ABSOLUTE RIGHT OF THE
FUND TO REJECT ANY AND ALL TENDERS DETERMINED BY IT, IN ITS SOLE DISCRETION, NOT
TO BE IN THE APPROPRIATE FORM.

         The undersigned hereby sells to the Fund the Interest tendered pursuant
to this  Letter  of  Transmittal.  The  undersigned  warrants  that it has  full
authority  to sell the Interest  tendered  hereby and that the Fund will acquire
good title to the Interest, free and clear of all liens, charges,  encumbrances,
conditional sales agreements or other obligations relating to this sale, and not
subject to any adverse  claim,  when and to the extent the Interest is purchased
by the Fund.  Upon  request,  the  undersigned  will  execute  and  deliver  any
additional documents necessary to complete the sale in accordance with the terms
of the Offer.

         The undersigned  recognizes that under certain circumstances set out in
the Offer,  the Fund may not be  required  to  purchase  the  Interest  tendered
hereby.

         A promissory note (the "Note") for the value of the purchased  Interest
will be held by PFPC Inc.  ("PFPC") on behalf of the  undersigned.  Upon written
request by the  undersigned to PFPC,  PFPC will mail the Note to the undersigned
at the address of the  undersigned as maintained in the books and records of the
Fund. The initial  payment of the purchase  amount for the Interest  tendered by
the  undersigned  will be  made by wire  transfer  of the  funds  to an  account
designated by the undersigned in this Letter of Transmittal.

         The Note will also  reflect  the  "Post-Audit  Payment"  portion of the
purchase amount,  if any, as described in Section 7 of the Offer. Any Post-Audit
Payment of cash due  pursuant to the Note will also be made by wire  transfer of
the funds to the  undersigned's  account as  provided  herein.  The  undersigned
recognizes  that the amount of the initial  payment of the  purchase  amount for
Interests  will be  based on the  unaudited  net  asset  value of the Fund as of
September 30, 2006, subject to an extension of the Offer as described in Section
8 of the  Offer.  The  Post-Audit  Payment  will be payable  promptly  after the
completion of the Fund's next annual audit.  It is  anticipated  that the annual
audit of the Fund's financial statements will be completed no later than 60 days
after the fiscal year-end of the Fund.

         All  authority  conferred  or agreed to be  conferred in this Letter of
Transmittal  will survive the death or  incapacity  of the  undersigned  and the
obligation of the undersigned  hereunder will be binding on the heirs,  personal
representatives,  successors and assigns of the undersigned. Except as stated in
Section 6 of the Offer, this tender is irrevocable.

         PLEASE FAX OR MAIL (VIA CERTIFIED MAIL,  RETURN RECEIPT  REQUESTED) TO:
HATTERAS  MASTER FUND,  L.P., C/O PFPC INC., P.O. BOX 219,  CLAYMONT,  DE 19703,
ATTENTION: TENDER OFFER ADMINISTRATOR.  FOR ADDITIONAL INFORMATION: PHONE: (800)
348-1824 OR FAX: (302) 791-2790.

                                       2


PART 1.  NAME:

         Name of Partner:  ___________________________________

         Telephone Number:  __________________________________

PART 2.  AMOUNT OF LIMITED PARTNERSHIP INTEREST
         BEING TENDERED:

         [ ]   A portion of the undersigned's limited partnership
               interest expressed as a specific dollar value.

         $
          -----------------------

         [ ]   The undersigned's entire limited partnership interest.



PART 3.  PAYMENT:

         CASH PAYMENT

         Cash  payments will be wire transferred to the account you specify
         below:

                        ---------------------------------
                                  Name of Bank

                        ---------------------------------
                                 Address of Bank

                        ---------------------------------
                                   ABA Number

                        ---------------------------------
                                 Account Number

                        ---------------------------------
                        Name Under Which Account Is Held



                  PROMISSORY NOTE

         The Note reflecting both the initial payment and the Post-Audit Payment
         portion of the purchase  amount,  as  applicable,  will be held by PFPC
         Inc.  on the  undersigned's  behalf.  Upon  a  written  request  by the
         undersigned to PFPC,  PFPC will mail the Note to the undersigned at the
         address of the  undersigned  as  maintained in the books and records of
         the Fund.

                                       3


PART 4.  SIGNATURE(S):



                                                        
FOR INDIVIDUAL INVESTORS                                   FOR OTHER INVESTORS:
AND JOINT TENANTS:

- ---------------------------------------------------        -------------------------------------------------
Signature                                                  Print Name of Investor
(SIGNATURE OF OWNER(S) EXACTLY AS APPEARED ON
SUBSCRIPTION AGREEMENT)

- ---------------------------------------------------        -------------------------------------------------
Print Name of Investor                                     Signature
                                                           (SIGNATURE OF OWNER(S) EXACTLY AS APPEARED ON
                                                           SUBSCRIPTION AGREEMENT)

- ---------------------------------------------------        -------------------------------------------------
Joint Tenant Signature if necessary (SIGNATURE OF          Print Name of Signatory and Title
OWNER(S) EXACTLY AS APPEARED ON SUBSCRIPTION
AGREEMENT)

- ---------------------------------------------------        -------------------------------------------------
Print Name of Joint Tenant                                 Co-signatory if necessary (SIGNATURE OF
                                                           OWNER(S) EXACTLY AS APPEARED ON SUBSCRIPTION
                                                           AGREEMENT)

                                                           -------------------------------------------------
                                                           Print Name and Title of Co-signatory
Date:  ______________


                                       4


                                    EXHIBIT D

                         NOTICE OF WITHDRAWAL OF TENDER

                             Regarding Interests in

                           HATTERAS MASTER FUND, L.P.

                   Tendered Pursuant to the Offer to Purchase
                               Dated June 23, 2006


                   THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE
                    AT, AND THIS NOTICE OF WITHDRAWAL MUST BE
                            RECEIVED BY PFPC INC. BY,
            12:00 MIDNIGHT, EASTERN STANDARD TIME, ON JULY 25, 2006,
                          UNLESS THE OFFER IS EXTENDED.


                Complete This Notice of Withdrawal And Return To:

                           Hatteras Master Fund, L.P.,
                                  c/o PFPC Inc.
                                  P.O. Box 219
                               Claymont, DE 19703

                      Attention: Tender Offer Administrator
                              Phone: (800) 348-1824
                               Fax: (302) 791-2790


Ladies and Gentlemen:

         The   undersigned   wishes  to  withdraw  the  tender  of  its  limited
partnership  interest in Hatteras Master Fund, L.P. (the "Fund"),  or the tender
of a portion of such  interest,  for  purchase by the Fund that  previously  was
submitted by the undersigned in a Letter of Transmittal dated ____________.

         Such tender was in the amount of:

         [ ]   The undersigned's entire limited partnership interest.

         [ ]   A portion of the undersigned's limited partnership interest
               expressed as a specific dollar value.

         $
          -----------------------

         The  undersigned  recognizes that upon the submission on a timely basis
of this Notice of Withdrawal of Tender,  properly executed,  the interest in the
Fund (or portion of such interest)  previously tendered will not be purchased by
the Fund upon expiration of the tender offer described above.



                                                        
SIGNATURE(S):

FOR INDIVIDUAL INVESTORS                                    FOR OTHER INVESTORS:
AND JOINT TENANTS:

- -----------------------------------------------------       ---------------------------------------------------------
Signature                                                   Print Name of Investor
(SIGNATURE OF OWNER(S) EXACTLY AS APPEARED ON
SUBSCRIPTION AGREEMENT)

- -----------------------------------------------------       ---------------------------------------------------------
Print Name of Investor                                      Signature
                                                            (SIGNATURE OF OWNER(S) EXACTLY AS APPEARED ON
                                                            SUBSCRIPTION AGREEMENT)

- -----------------------------------------------------       ---------------------------------------------------------
Joint Tenant Signature if necessary (SIGNATURE OF           Print Name of Signatory and Title
OWNER(S) EXACTLY AS APPEARED ON SUBSCRIPTION
AGREEMENT)

- -----------------------------------------------------       ---------------------------------------------------------
Print Name of Joint Tenant                                  Co-signatory if necessary (SIGNATURE OF OWNER(S)
                                                            EXACTLY AS APPEARED ON SUBSCRIPTION AGREEMENT)

                                                            ---------------------------------------------------------
                                                            Print Name and Title of Co-signatory
Date:  ______________



                                    EXHIBIT E

                  FORMS OF LETTERS FROM THE FUND TO PARTNERS IN
                 CONNECTION WITH ACCEPTANCE OF OFFERS OF TENDER


                                                               [______ __, 200_]

Dear Partner:

         Hatteras  Master Fund,  L.P. (the "Fund") has received and accepted for
purchase  your tender of all or a part of your limited  partnership  interest in
the Fund (your "Interest").

         Because you have  tendered and the Fund has  purchased all or a part of
your Interest, you have been issued a note (the "Note") entitling you to receive
an initial payment in an amount equal to at least 90% (100% if you tendered less
than your entire  Interest) of the value of the purchased  Interest based on the
unaudited  net asset value of the Fund as of September  30, 2006,  in accordance
with the terms of the tender  offer.  A cash payment in this amount will be wire
transferred  to the account  designated by you in your Letter of  Transmittal no
later than October 31, 2006,  unless the repurchase date of the interests in the
Fund has changed, or the Fund has requested a withdrawal of its capital from the
investment funds in which it invests. The Note will be held by PFPC Inc. on your
behalf. Upon a written request by you to PFPC, PFPC will mail the Note to you at
the address for you as maintained in the books and records of the Fund.

         If you  tendered  your entire  Interest,  the terms of the Note provide
that a post-audit  payment  representing the balance of the purchase amount,  if
any, will be paid to you promptly after the completion of the Fund's next annual
audit  according  to the terms of the tender  offer.  We expect  that the annual
audit of the Fund's  financial  statements  will be  completed by the end of May
2007.

         If you are  tendering  only a portion  of your  Interest,  you remain a
Partner of the Fund with  respect to the portion of your  Interest  that you did
not tender.

         Should you have any  questions,  please feel free to contact the Tender
Offer Administrator at PFPC Inc. at (800) 348-1824.

Sincerely,

Hatteras Master Fund, L.P.


                                                               [______ __, 200_]

Dear Partner:

         Enclosed  is  a  statement   showing  the  breakdown  of  your  capital
withdrawal resulting from our purchase of your interest in Hatteras Master Fund,
L.P. (the "Fund").

         Because you have  tendered and the Fund has  purchased all or a part of
your  interest in the Fund,  you have been paid an amount  equal to at least 90%
(100% if you  tendered  less  than  your  entire  Interest)  of the value of the
purchased  interest  in the Fund based on the  unaudited  net asset value of the
Fund as of September 30, 2006, in accordance with the terms of the tender offer.
A cash  payment  in  this  amount  has  been  wire  transferred  to the  account
designated by you in your Letter of Transmittal.

         The  balance  of the  purchase  amount,  if  any,  will  be paid to you
promptly after the  completion of the Fund's next annual audit  according to the
terms of the  tender  offer.  We  expect  that the  annual  audit of the  Fund's
financial statements will be completed by the end of May 2007.

         Should you have any  questions,  please feel free to contact the Tender
Offer Administrator at PFPC Inc. at (800) 348-1824.

Sincerely,

Hatteras Master Fund, L.P.



Enclosure

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