UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-Q

             QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
                         MANAGEMENT INVESTMENT COMPANY

               Investment Company Act file number  811-21605
                                                 ----------------

          The Topiary Master Fund for Benefit Plan Investors (BPI) LLC
          -------------------------------------------------------------
               (Exact name of registrant as specified in charter)

                               25 DeForest Avenue
                            Summit, New Jersey 07901
          -------------------------------------------------------------
               (Address of principal executive offices) (Zip code)

                     John H. Kim, Director & Senior Counsel
                            Deutsche Asset Management
                                 345 Park Avenue
                            New York, New York 10154
           ------------------------------------------------------------
                    (Name and address of agent for service)

        Registrant's telephone number, including area code: 212-454-6849
                                                            ------------
                        Date of fiscal year end: March 31
                                                 --------
                   Date of reporting period: December 31, 2005
                                             -----------------

Form N-Q is to be used by  management  investment  companies,  other  than small
business investment companies registered on Form N-5 (ss.ss. 239.24 and 274.5 of
this chapter), to file reports with the Commission, not later than 60 days after
the close of the first and third fiscal quarters,  pursuant to rule 30b1-5 under
the Investment  Company Act of 1940 (17 CFR 270.30b1-5).  The Commission may use
the  information  provided  on Form N-Q in its  regulatory,  disclosure  review,
inspection, and policymaking roles.

A registrant is required to disclose the information  specified by Form N-Q, and
the Commission will make this  information  public. A registrant is not required
to respond to the  collection  of  information  contained in Form N-Q unless the
Form displays a currently  valid Office of Management and Budget ("OMB") control
number.  Please  direct  comments  concerning  the  accuracy of the  information
collection  burden  estimate and any  suggestions for reducing the burden to the
Secretary,  Securities and Exchange Commission, 100 F Street, NE, Washington, DC
20549.  The OMB has reviewed this collection of information  under the clearance
requirements of 44 U.S.C. ss. 3507.



ITEM 1. SCHEDULE OF INVESTMENTS.
The Schedule of Investments is attached herewith.

         The Topiary Master Fund for Benefit Plan Investors (BPI) LLC

                             Schedule of Investments
                                   (Unaudited)
                                December 31, 2005




                                                                                                                        % OF
                                                                                                                      MEMBERS'
STRATEGY                  INVESTMENT FUND                             COST              FAIR VALUE     LIQUIDITY       CAPITAL
--------                  ---------------                             ----              ----------     ---------       -------
                                                                                                         
Event Driven
                          Avenue Europe Investments, L.P.                 932,212        1,075,243     Quarterly          1.7%
                          Gracie Capital L.P.                           2,000,000        2,160,097      Annually          3.5%
                          Harbert Distressed Investment Fund, L.P.        874,965        1,047,125     Quarterly          1.7%
                          Marathon Special Opportunity Fund, L.P.       1,500,000        1,621,160      Annually          2.6%
                          Merced Partners, L.P.                         1,550,000        1,782,092      Annually          2.9%
                          Perry Partners, L.P.                          2,600,000        2,793,034      Annually          4.5%
                          Special K Capital II, L.P.                      750,000          435,878      Annually          0.7%
                          Strategic Value Restructuring Fund, L.P.        870,036        1,108,040      Annually          1.8%
                                                                      --------------------------------------------------------
Total Event Driven                                                     11,077,213       12,022,669                       19.4%

Global Macro              Anglian Commodities U.S. Feeder
                                Fund, L.L.C.                              900,000          965,628      Monthly           1.5%
                          Bear Stearns Emerging Markets Macro
                                Fund, LP                                  700,000          714,700      Monthly           1.1%
                          Bridgewater Pure Alpha Trading Fund I         1,112,167        1,221,424      Monthly           2.0%
                          Drawbridge Global Macro Fund, L.P.            1,152,845        1,440,807     Quarterly          2.3%
                          FX Concepts Global Fund Master
                                Trust - Multi Strategy Series             205,668          216,202      Monthly           0.3%
                          GSA Capital Macro Partners, LP                  700,000          678,211      Monthly           1.1%
                          Vega Select Opportunities Fund Limited          930,056          887,667      Monthly           1.4%
                                                                      --------------------------------------------------------
Total Global Macro                                                      5,700,736        6,124,639                        9.7%

Long/Short Equity
                          Artha Emerging Markets Fund, L.P.             1,050,000        1,335,750     Quarterly          2.1%
                          Bonanza Partners LP                           1,250,000        1,358,949     Quarterly          2.2%
                          Delta Fund Europe LP                          1,700,000        2,249,372     Quarterly          3.6%
                          Delta Institutional, LP                       1,500,000        1,579,822     Quarterly          2.5%
                          FrontPoint Value Discovery Fund, L.P.         1,400,000        1,648,182     Quarterly          2.6%
                          Gandhara Fund L.P.                            1,120,000        1,275,747     Quarterly          2.0%
                          Hard Assets Partners, L.P.                    1,200,000        1,422,901      Monthly           2.3%
                          Hayground Cove Institutional Partners,
                                L.P.                                    1,150,000        1,234,156     Quarterly          2.0%
                          Jana Partners Qualified, L.P.                 2,450,000        2,491,035     Quarterly          4.0%
                          Kinetics Partners, L.P.                       1,550,000        1,854,435     Quarterly          3.0%
                          MPC Pilgrim, L.P.                               938,104        1,046,329      Monthly           1.7%




          The Topiary Master Fund for Benefit Plan Investors (BPI) LLC

                             Schedule of Investments
                             (Unaudited)(Continued)
                                December 31, 2005



                                                                                                                        % OF
                                                                                                                      MEMBERS'
STRATEGY                  INVESTMENT FUND                             COST              FAIR VALUE     LIQUIDITY       CAPITAL
--------                  ---------------                             ----              ----------     ---------       -------
                                                                                                         
                          RX Healthcare Partners II, L.P.                 691,404          720,856     Quarterly          1.2%
                          Seligman Tech Spectrum Fund LLC                 750,000          781,065      Monthly           1.3%
                          SR Global, L.P. Asia                          1,000,000        1,406,198      Monthly           2.3%
                          TCS Capital II, L.P.                          1,175,000        1,542,761      Annually          2.5%
                          Torrey Pines Fund, L.L.C.                       449,024          512,861     Quarterly          0.8%
                          Tracer Capital Partners QP, LP                1,000,000        1,138,090     Quarterly          1.8%
                          UC Financials Fund Limited                    1,350,000        1,579,883      Monthly           2.5%
                          WF Japan Fund Limited                           750,000          865,950                        1.3%
                                                                      --------------------------------------------------------
Total Long/Short Equity                                                22,473,532       26,044,342                       41.7%
                                                                      --------------------------------------------------------

Relative Value            Affinium Fund Ltd                               500,000          508,976      Annually          0.8%
                          Amaranth Capital Partners, L.L.C.             2,150,000        2,638,006      Annually          4.2%
                          Bogle World Fund, L.P.                        1,600,000        1,794,957     Quarterly          2.9%
                          Citadel Wellington Partners, L.L.C.           3,400,000        3,658,013     Quarterly          5.9%
                          Ellington Overseas Partners, Ltd.               700,000          770,167     Quarterly          1.2%
                          HBK Offshore Fund Ltd                         2,000,000        2,013,857     Quarterly          3.2%
                          Julius Baer Diversified Fixed Income                                         Quarterly
                               Hedge Fund                                 881,616          989,270                        1.6%
                          Marathon Global Convertible Fund L.P
                                                                          750,000          752,788      Monthly           1.2%
                          Silverback Partners, L.P.                       186,063          154,675     Quarterly          0.2%
                          Stadia Consumer Fund (QP), L.P.                 968,258          926,402     Quarterly          1.5%
                                                                      --------------------------------------------------------
Total Relative Value                                                   13,135,937       14,207,111                       22.7%
                                                                      --------------------------------------------------------
                          Total                                       $52,387,418      $58,398,761                       93.5%
                                                                      --------------------------------------------------------
                          Liabilities in Excess of Other Assets                          4,061,927                        6.5%
                                                                                       -----------                      ------
                          Members' Capital                                             $62,460,688                      100.0%
                                                                                       ===========                      ======




ITEM 2. CONTROLS AND PROCEDURES.

          (a)  The  registrant's  principal  executive and  principal  financial
               officers, or persons performing similar functions, have concluded
               that the  registrant's  disclosure  controls and  procedures  (as
               defined in Rule  30a-3(c)  under the  Investment  Company  Act of
               1940,  as amended  (the "1940  Act") (17 CFR  270.30a-3(c)))  are
               effective,  as of a date within 90 days of the filing date of the
               report that includes the disclosure  required by this  paragraph,
               based  on  their  evaluation  of these  controls  and  procedures
               required   by  Rule   30a-3(b)   under   the  1940  Act  (17  CFR
               270.30a-3(b))   and  Rules   13a-15(b)  or  15d-15(b)  under  the
               Securities Exchange Act of 1934, as amended (17 CFR 240.13a-15(b)
               or 240.15d-15(b)).

           (b) There were no changes in the  registrant's  internal control over
               financial  reporting (as defined in Rule 30a-3(d)  under the 1940
               Act (17 CFR  270.30a-3(d))  that occurred during the registrant's
               last  fiscal  quarter  that  have  materially  affected,  or  are
               reasonably likely to materially affect, the registrant's internal
               control over financial reporting.


ITEM 3. EXHIBITS.

Certifications pursuant to Rule 30a-2(a) under the 1940 Act and Section 302 of
the Sarbanes-Oxley Act of 2002 are attached hereto.



                                   SIGNATURES

Pursuant to the  requirements  of the  Securities  Exchange  Act of 1934 and the
Investment Company Act of 1940, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant) The Topiary Master Fund for Benefit Plan Investors (BPI) LLC
            -----------------------------------------------------------------

By (Signature and Title)*  /s/ Pamela Kiernan
                           --------------------------------------------------
                           Pamela Kiernan, President
                           (principal executive officer)

Date         February 28, 2006
    -------------------------------------------------------------------------


Pursuant to the  requirements  of the  Securities  Exchange  Act of 1934 and the
Investment  Company  Act of  1940,  this  report  has been  signed  below by the
following  persons on behalf of the  registrant and in the capacities and on the
dates indicated.


By (Signature and Title)*  /s/ Pamela Kiernan
                           --------------------------------------------------
                           Pamela Kiernan, President
                           (principal executive officer)

Date         February 28, 2006
    -------------------------------------------------------------------------



By (Signature and Title)*  /s/ Marie Glassman
                           --------------------------------------------------
                           Marie Glassman, Treasurer, Principal Financial
                           Officer and Accounting Officer
                           (principal financial officer)

Date         February 23, 2006
-------------------------------------------------------------------------


* Print the name and title of each signing officer under his or her signature.