MERRIMAC FUNDS
N-1A/A, 2000-04-28
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     As filed with the Securities and Exchange Commission on April 28, 2000



                          1940 Act File No. 811-07939

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                   FORM N-1A

        REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940



                                AMENDMENT NO. 3



                                MERRIMAC FUNDS
              (Exact Name of Registrant as Specified in Charter)

               200 Clarendon Street, Boston, Massachusetts 02116
                   (Address of Principal Executive Offices)

      Registrant's Telephone Number, Including Area Code: (888) 637-7622



                          Susan C. Mosher, Secretary
                                Merrimac Funds
                             200 Clarendon Street
                                Mail Code LEG13
                          Boston, Massachusetts 02116
                    (Name and Address of Agent for Service)



                                   Copy to:
                               Philip H. Newman
                          Goodwin, Procter & Hoar LLP
                                Exchange Place
                          Boston, Massachusetts 02109








                                      (i)

<PAGE>

                                MERRIMAC FUNDS

                               EXPLANATORY NOTE

This  Registration  Statement  has been  filed by the  Registrant  pursuant  to
Section  8(b) of the  Investment  Company  Act of 1940,  as amended  (the "1940
Act"). However, beneficial interests in the Registrant are not being registered
under the  Securities  Act of 1933,  as  amended  (the "1933  Act")  since such
interests will be issued solely in private placement  transactions which do not
involve any "public  offering"  within the meaning of Section  4(2) of the 1933
Act.  Investments  in the  Registrant's  series may only be made by "accredited
investors"  within  the  meaning  of  Regulation  D under  the 1933  Act  which
generally includes institutional investors and high net worth individuals. This
Registration   Statement   does  not  constitute  an  offer  to  sell,  or  the
solicitation of an offer to buy, any beneficial  interests in any series of the
Registrant.

Pursuant to General Instruction B2 of Form N-1A, a registration statement filed
under  only  the  1940 Act  shall  consist  of the  facing  sheet of the  Form,
responses to all items of Parts A and B except Items 1, 2, 3, 5 and 9 of Part A
thereof,  responses  to all items of Part C except  Items 23(e) and (i)-(k) and
the required signatures, and all other documents that are required or which the
Registrant may file as part of the registration statement.




                                     (ii)

<PAGE>






















                                    PART A











                                     A - 1

<PAGE>



                                    PART A
                                  May 1, 2000



Responses to Items 1, 2, 3, 5 and 9 have been omitted pursuant to paragraph (b)
of Instruction B.2. of the General Instructions to Form N-1A.

Item 4.   INVESTMENT OBJECTIVE, PRINCIPAL INVESTMENT STRATEGIES AND RELATED
RISKS

MERRIMAC CASH FUND

INVESTMENT OBJECTIVE

The  investment  objective  of the  Merrimac  Cash Fund (the "Cash Fund") is to
achieve a high level of current income consistent with preserving principal and
liquidity.  In view of the risks  inherent in all  investments  in  securities,
there is no assurance that the Fund's objective will be achieved.

IMPLEMENTATION OF INVESTMENT OBJECTIVES



The Cash Fund is a series of Merrimac Funds (the "Trust").  Unlike other mutual
funds which directly acquire and manage their own portfolios of securities, the
Cash Fund seeks to achieve its  investment  objective by  investing  all of its
investable  assets in the Merrimac Cash Portfolio (the "Cash  Portfolio") which
is a series of the Merrimac Master Portfolio, an open-end management investment
company  which is treated as a partnership  for federal tax purposes.  The Cash
Portfolio  has the same  investment  objective  and  policies as the Cash Fund.
Allmerica  Asset  Management,  Inc.  ("AAM")  acts as  sub-adviser  to the Cash
Portfolio and manages its investment program.

The Cash Portfolio's principal investment strategy is to invest in high quality
U.S. dollar-denominated,  money market instruments with remaining maturities of
397  calendar  days or less that in the opinion of AAM present  minimal  credit
risk.

The  Cash  Portfolio  may  invest  in the  following  U.S.  dollar  denominated
instruments:

   o  variable rate obligations;

   o  commercial paper;

   o  corporate debt;

   o  certificates of deposits;

   o  obligations of the U.S. Government or its agencies or instrumentalities;

   o  U.S. Treasury bill, notes and bonds

   o  variable rate municipal obligation;

   o  municipal obligations;

   o  securities  of U.S. and foreign  banks or thrift  organizations  (such as
      bankers' acceptances, time deposits and certificates of deposits);

   o  time deposits;

   o  asset-backed securities;

   o  other short-term debt securities; and

   o  repurchase  agreements that are  collateralized  by the securities listed
      above.



                                     A - 2

<PAGE>

Further description of these securities is found in APPENDIX A.

The Securities and Exchange  Commission  (SEC) has set certain  diversification
requirements  for money market funds.  Generally,  these  requirements  limit a
money market fund's  investments in securities of any issuer to no more than 5%
of a fund's  assets.  Also,  strict SEC guidelines do not permit AAM to invest,
with  respect to 75% of the Cash  Portfolio's  assets,  greater than 10% of the
Cash Portfolio's assets in securities issued by or subject to guarantees by the
same  institution.  Purchases of  securities  issued or  guaranteed by the U.S.
Government or its agencies or  instrumentalities  are not counted  toward these
limitations.

The Cash  Portfolio's  investments  consist  of  high-quality  securities  that
qualify  as  "first-tier"  securities  under the SEC rules  that apply to money
market funds. In general,  a first-tier  security is defined as a security that
is:



   o  issued  or   guaranteed   by  the  U.S.   Government  or  any  agency  or
      instrumentality thereof;
   o  rated or subject to a guarantee that is rated in the highest category for
      short-term securities by at least two Nationally  Recognized  Statistical
      Rating Organizations  (NRSROs),  or by one NRSRO if the security is rated
      by only one NRSRO;
   o  unrated but issued by an issuer or  guaranteed  by a  guarantor  that has
      other comparable short-term obligations so rated; or
   o  unrated  but  determined  by AAM to be of  comparable  quality  to  other
      first-tier securities.

In addition, AAM must consider whether a particular investment presents minimal
credit risk.

The current NRSROs are:



   o  Moody's Investors Service, Inc.;
   o  Standard & Poor's Ratings Group;
   o  Fitch's IBCA Investors Service;
   o  Duff & Phelps; and
   o  Thomson Bank Watch.

If the rating of a security is downgraded  after  purchase,  AAM will determine
whether it is in the best interest of the Cash Portfolio's  shareholders (i.e.,
the Cash Fund) to continue to hold the security.

While AAM will endeavor to maintain a constant Fund NAV of $1 per share,  there
is no assurance that they will be able to do so. The shares are neither insured
nor  guaranteed  by the U.S.  Government.  As such,  the Cash Fund carries some
risk. For example, there is always a risk that the issuer of a security held by
the Cash  Portfolio  will fail to pay interest or principal  when due. The Cash
Portfolio  attempts to minimize  credit risk by  investing  only in  securities
rated in the highest category for short-term  securities,  or, if not rated, of
comparable quality, at the time of purchase.  Additionally,  the Cash Portfolio
will not  purchase  a  security  unless AAM has  determined  that the  security
presents  minimal credit risk.  There is also a risk that rising interest rates
will cause the value of the Cash  Portfolio's  securities to decline.  The Cash
Portfolio  attempts to minimize  interest rate risk by limiting the maturity of
each  security to 397 calendar days or less and  maintaining a  dollar-weighted
average portfolio maturity for the Cash Portfolio of 90 days or less.

In arriving at a decision to buy or sell a security,  factors are balanced such
as credit quality and maturity to purchase the best relative value available in
the market at any given time. While rare, sell decisions

                                     A - 3

<PAGE>

are usually  based on a change in credit  analysis or to take  advantage  of an
opportunity to reinvest at a higher yield.

MERRIMAC TREASURY PLUS FUND (formerly "Merrimac Treasury Fund")

INVESTMENT OBJECTIVE

The investment objective of the Merrimac Treasury Plus Fund (the "Treasury Plus
Fund") is to achieve a high level of current income  consistent with preserving
principal and liquidity.  In view of the risks  inherent in all  investments in
securities,  there is no assurance that the Treasury Plus Fund's objective will
be achieved.

IMPLEMENTATION OF INVESTMENT OBJECTIVES



The Treasury Plus Fund is a series of the Merrimac Funds (the "Trust").  Unlike
other mutual funds which  directly  acquire and manage their own  portfolios of
securities, the Treasury Plus Fund seeks to achieve its investment objective by
investing all of its investable  assets in the Merrimac Treasury Plus Portfolio
(the  "Treasury  Plus  Portfolio")  which is a series  of the  Merrimac  Master
Portfolio,  an open-end  management  investment  company  which is treated as a
partnership for federal tax purposes.  The Treasury Plus Portfolio has the same
investment  objective  and policies as the Treasury Plus Fund.  M&I  Investment
Management Corp. ("M&I") acts as sub-adviser to the Treasury Plus Portfolio and
manages its investment program.



The Treasury Plus Portfolio's  principal  investment  strategy is to invest its
assets  in  high-quality,  U.S.  dollar-denominated  Treasury  securities  with
maturities of 397 calendar days or less.



The  Treasury  Plus  Portfolio  will invest at least 65% of its total assets in
direct obligations of the U.S. Treasury (U.S.  Treasury bills, notes and bonds)
or in repurchase  agreements that are collateralized by these  instruments.  It
may invest the remaining assets in securities  issued or guaranteed by the U.S.
Government or its agencies or in repurchase  agreements that are collateralized
by these instruments.



While M&I will endeavor to maintain a constant Fund NAV of $1 per share,  there
is no assurance that they will be able to do so. The shares are neither insured
nor guaranteed by the U.S. Government.  As such, the Treasury Plus Fund carries
some risk.  There is a risk that rising  interest rates will cause the value of
the Treasury Plus Portfolio's  securities to decline.  M&I attempts to minimize
interest  rate risk by limiting the  maturity of each  security to 397 calendar
days or less and maintaining a dollar-weighted  average portfolio  maturity for
the Treasury Plus Portfolio of 90 days or less.

In arriving at a decision to buy or sell a security,  factors are balanced such
as the Treasury Plus Portfolio's  objective of maximizing  current income while
maintaining  safety and  liquidity.  M&I  evaluates the  government  securities
market compared to the repurchase  agreement market to determine which provides
the most value to the Treasury Plus Portfolio.

                                     A - 4

<PAGE>

ITEM 6. MANAGEMENT, ORGANIZATION AND CAPITAL STRUCTURE

MANAGEMENT

INVESTMENT ADVISER

The Cash Fund and the Treasury  Plus Fund (each a "Fund" and  collectively  the
"Funds") have not retained the services of an investment  adviser  because each
invests all of its investable assets in its corresponding  Portfolio.  The Cash
Portfolio and the Treasury Plus Portfolio (each a "Portfolio" and  collectively
the  "Portfolios")  have each  retained the services of Investors  Bank & Trust
Company ("Investors Bank") as investment  adviser.  Investors Bank continuously
reviews and  supervises  the  Portfolios'  investment  program.  Investors Bank
discharges its  responsibilities  subject to the  supervision  of, and policies
established by, the Board of Trustees. Investors Bank's business address is 200
Clarendon Street,  Boston,  Massachusetts 02116. Investors Bank began acting as
an investment  adviser at the  commencement of operations of the Cash Portfolio
(November 21, 1996).  The Portfolios  each pay Investors Bank a unitary fee for
services as Investment Adviser,  Administrator,  Custodian, Fund Accountant and
Transfer  Agent.  The fee is computed at an annual rate of 0.17% of average net
assets (ANA) of each such Portfolio.



The investment  adviser and sub-advisers may pay out of their respective fees a
transaction,  service,  administrative,  or  other  similar  fee  charged  by a
financial intermediary,  or other financial  representative with respect to the
purchase or sale of shares of each Fund. The financial  intermediaries also may
impose  requirements on the purchase or sale of shares that are different from,
or in addition to, those imposed by each Fund, including requirements as to the
minimum initial and subsequent investment amounts.



INVESTMENT SUB-ADVISERS



AAM serves as investment  sub-adviser  to the Cash  Portfolio.  AAM manages the
Cash Portfolio,  selects investments and places all orders for the purchase and
sale of the Cash Portfolio's securities, subject to the general supervision of,
and policies  established  by the Board of Trustees  and  Investors  Bank.  The
business address of AAM is 440 Lincoln Street, Worcester,  Massachusetts 01653.
AAM has been providing investment advisory services since it was established in
1993  as  an  indirect,   wholly-owned   subsidiary   of  Allmerica   Financial
Corporation.  AAM  receives  a fee from  Investors  Bank  (and  not  from  Cash
Portfolio)  for its services as investment  sub-adviser.  Prior to September 1,
1998,  The  Bank of New  York  acted  as  investment  sub-adviser  for the Cash
Portfolio.



M&I serves as  investment  sub-adviser  to the  Treasury  Plus  Portfolio.  M&I
manages the Treasury Plus Portfolio,  selects investments and places all orders
for the purchase and sale of the Treasury Plus Portfolio's securities,  subject
to the  general  supervision  of,  and  policies  established  by the  Board of
Trustees and Investors  Bank.  The business  address of M&I is 1000 North Water
Street, Milwaukee,  Wisconsin 53202. M&I has been providing investment advisory
services  since  it was  established  in  1973  as a  first  tier  wholly-owned
subsidiary  of  Marshall  & Isley  Corporation,  a publicly  held bank  holding
company.  M&I receives  fees from  Investors  Bank (and not from  Treasury Plus
Portfolio) for its services as investment sub-adviser.

                                     A - 5


<PAGE>

ITEM 7. SHAREHOLDER INFORMATION

PRICING OF FUND SHARES

Shares  of the Funds are sold at the net asset  value  ("NAV")  per share  next
computed after the purchase order is received in good order by Investors  Bank.
NAV per share is  determined  once each  Business  Day as of 4:00 p.m.  (ET). A
Business  Day is any day on which both the New York Stock  Exchange and the New
York Federal Reserve Bank are open.

Securities  purchased by the  Portfolios  are stated at amortized  cost,  which
approximates market value.

PURCHASE OF FUND SHARES



Shares of the Funds may be  purchased  by  "accredited  investors"  within  the
meaning  of  Regulation  D  under  the  1933  Act,  which  generally   includes
institutional  investors  and high net  worth  individuals,  that  have  opened
accounts  with the Funds.  The Funds each offer two classes of shares:  Premium
Class and Institutional Class. The minimum initial investment for Premium Class
shares is $10  million.  Institutions  may satisfy the  minimum  investment  by
aggregating their fiduciary  accounts.  The minimum initial  investment for the
Institutional  Class  shares is  $10,000.  Subsequent  purchases  may be in any
amount.  The Funds reserve the right to waive the minimum  initial  investment.
When a Premium Class  shareholder's  account balance falls below $1 million due
to redemption,  the shareholder's  account may be closed. Such shareholder will
be notified if the minimum balance is not being  maintained and will be allowed
60 days to make additional investments before the account is closed.



Share  purchase  orders are deemed to be in good order on the date a  completed
Subscription  Agreement is received  (along with other required  documents) and
federal funds become available in the Funds' account with Investors Bank.

PURCHASES  MAY BE MADE ONLY BY WIRE.  A bank may  impose a charge to  execute a
wire transfer.  A purchaser must call 1-888-MERRMAC to inform Investors Bank of
an incoming wire transfer.  A purchase order for shares received in proper form
by 4:00 p.m.  (ET) on a Business Day will be executed at the NAV per share next
determined  after receipt of the order,  provided that  Investors Bank receives
the wire by the close of business on the day the  purchase  order is  received.
Purchase  orders  received after 4:00 p.m.  (ET),  will be effected on the next
Business Day if cleared funds are received  before the close of business on the
next  Business Day.  Purchase  orders for shares for which payment has not been
received by the close of business will not be accepted, and notice thereof will
be given to the  purchaser.  The Funds  also may limit the amount of a purchase
order received between 3:00 p.m. (ET) and 4:00 p.m. (ET).

On days  when  the  financial  markets  close  early,  such  as the  day  after
Thanksgiving  and Christmas Eve, all purchase  orders must be received by 12:00
noon (ET).

The Funds  reserve  the  right in their  sole  discretion  (i) to  suspend  the
offering of shares,  (ii) to reject  purchase  orders when in its best interest
and (iii) to modify or  eliminate  the  minimum  initial  investment.  Purchase
orders may be refused if, for  example,  they are of a size that could  disrupt
management of the Portfolios.

REDEMPTION OF FUND SHARES

Shareholders  may redeem all or a portion of their shares on any Business  Day.
Shares will be redeemed

                                     A - 6

<PAGE>

at the NAV next determined after Investors Bank has received a proper notice of
redemption as described  below.  If notice of  redemption is received  prior to
4:00  p.m.  (ET)  for each  Fund on a  Business  Day,  the  redemption  will be
effective on the date of receipt. Proceeds of the redemption will ordinarily be
made by wire on the date of receipt,  but in any event  within  three  Business
Days from the date of receipt.

Shareholder  redemption requests received after 4:00 p.m. (ET) for each Fund on
a Business Day, will  ordinarily  receive  payment by wire on the next Business
Day, but, in any event, within four Business Days from the date of receipt of a
proper notice of redemption.  All redemption  requests placed between 3:00 p.m.
and 4:00 p.m. (ET) may only be placed by telephone.

Each Fund reserves the right in its sole  discretion to suspend  redemptions or
postpone payments when the NYSE is closed or when trading is restricted for any
reason or under  emergency  circumstances  as  determined by the SEC. Each Fund
reserves  the right to  postpone  payments  for  redemption  requests  received
between 3:00 p.m. and 4:00 p.m. (ET) until the next Business Day.

On days  when  the  financial  markets  close  early,  such  as the  day  after
Thanksgiving and Christmas Eve, all redemption orders must be received by 12:00
noon (ET).

A  shareholder  may elect to  receive  payment  in the form of a wire or check.
There is no charge imposed by a Fund to redeem shares;  however, in the case of
redemption by wire, a  shareholder's  bank may impose its own wire transfer fee
for receipt of the wire.

DIVIDENDS AND DISTRIBUTIONS

Each  Fund  intends  to  declare  as a  dividend  substantially  all of its net
investment income at the close of each Business Day and will pay such dividends
monthly.  Substantially  all  of  a  Fund's  distributions  will  be  from  net
investment  income.  Shareholders  of the Funds  shall be  entitled  to receive
dividends on the Business Day their  purchase is effected but shall not receive
dividends on the Business Day that their redemption is effected.  Distributions
of net  capital  gains,  if any,  are made  annually at the  discretion  of the
officers of the Funds.  Dividends  and/or  capital gain  distributions  will be
reinvested  automatically  in additional  shares at NAV and such shares will be
automatically credited to a shareholder's account,  unless a shareholder elects
to receive either dividends or capital gains  distributions  (or both) in cash.
Shareholders  may change  their  distribution  option at any time by writing to
Investors Bank with a Signature  Guarantee prior to the record date of any such
dividend or distribution.

TAX CONSEQUENCES

- -------------------------------------------------------------------------------
                TRANSACTIONS                            TAX STATUS

- -------------------------------------------------------------------------------
Sales or exchanges of shares.           Usually capital gain or loss.  Tax rate
                                        depends on how long shares are held.

- -------------------------------------------------------------------------------
Distributions of long-term capital      Taxable as long-term capital gain.
gain.

- -------------------------------------------------------------------------------
Distributions of short-term capital     Taxable as ordinary income.
gain.

- -------------------------------------------------------------------------------
Dividends from net investment income.   Taxable as ordinary income.

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

                                     A - 7

<PAGE>

Every  January,  the Funds  provide  information  to their  shareholders  about
dividends and  distributions,  which are taxable even if reinvested,  and about
the   shareholders;   redemptions   during  the  previous  calendar  year.  Any
shareholder who does not provide a correct taxpayer  identification  number and
required certification may be subject to federal backup withholding tax.

Shareholders  should  generally  avoid  investing in a fund  shortly  before an
expected  taxable  dividend  or  capital  gain   distribution.   Otherwise,   a
shareholder may pay taxes on dividends or  distributions  that are economically
equivalent to a partial return of the shareholder's investment.

Shareholders  should  consult their tax advisers about their own particular tax
situations.

DISTRIBUTION EXPENSES



Shares of each Fund are sold on a private  placement  basis in accordance  with
Regulation D under the 1933 Act,  directly by the Funds  without a  distributor
and  are  not  subject  to a  sales  load  or  redemption  fee;  assets  of the
Institutional Class of shares are subject to a shareholder  servicing fee of up
to 0.25% of average daily net assets. The assets of the Premium Class of shares
are not subject to a Rule 12b-1 or shareholder servicing fee.



MASTER FEEDER FUNDS

The Funds are "feeder" funds that invest exclusively in corresponding  "master"
portfolios  with  identical  investment  objectives.  The master  portfolio may
accept   investments  from  multiple  feeder  funds,   which  bear  the  master
portfolio's expenses in proportion to their assets.

Each  feeder  fund and its  master  portfolio  expect  to  maintain  consistent
investment objectives, but if they do not, a Fund will withdraw from the master
portfolio,  receiving either cash or securities in exchange for its interest in
the master  portfolio.  The Trustees of the Trust would then consider whether a
Fund should hire its own investment adviser,  invest in a different  portfolio,
or take other action.

                                     A - 8

<PAGE>

                                  APPENDIX A

MONEY MARKET  INSTRUMENTS.  An investment in a Portfolio is subject to interest
rate risk and credit risk of the issuers of the money market  instruments.  All
money market instruments can change in value when interest rates or an issuer's
creditworthiness  changes,  or if an issuer or guarantor of a security fails to
pay interest or principal when due.

U.S. GOVERNMENT SECURITIES.  The Cash Portfolio and the Treasury Plus Portfolio
each  may  invest  in  U.S.  Government  Securities.  Not all  U.S.  Government
Securities  are backed by the full faith and credit of the United  States.  For
example,  securities  issued by the Federal  Farm Credit Bank or by the Federal
National  Mortgage  Association  are supported by the agency's  right to borrow
money from the U.S. Treasury under certain circumstances.  Securities issued by
the  Federal  Home Loan Bank are  supported  only by the credit of the  agency.
There is no guarantee  that the U.S.  Government  will  support  these types of
securities,  and therefore  they involve more risk than "full faith and credit"
Government Securities.

BANKERS'  ACCEPTANCES.  The Cash  Portfolio may invest in bankers'  acceptances
which  are  bills  of  exchange  or time  drafts  drawn  on and  accepted  by a
commercial  bank.  They are used by  corporations  to finance the  shipment and
storage of goods and to furnish dollar  exchange.  Maturities are generally six
months or less.



COMMERCIAL PAPER. The Cash Portfolio may invest in commercial  paper,  which is
the term used to  designate  unsecured  short-term  promissory  notes issued by
corporations  and other  entities.  The Cash Portfolio may invest in commercial
paper  with  maturities  which  vary from a few days to nine  months.  The Cash
Portfolio  may also  purchase  U.S.  dollar-denominated  commercial  paper of a
foreign issuer rated in the highest or second  highest rating  categories by at
least two NRSROs.

SECURITIES  LENDING.  Each Portfolio may lend up to 33 1/3% of its portfolio of
securities  pursuant  to  agreements  requiring  that the loan be  continuously
secured  by cash or  equivalent  collateral  or by a letter  of  credit or bank
guarantee in favor of the  Portfolio at least equal at all times to 100% of the
market value plus accrued  interest on the securities  lent. The Portfolio will
continue  to receive  interest  on the  securities  lent  while  simultaneously
seeking to earn interest on the  investment of cash  collateral.  Collateral is
marked to market daily.  Loans are subject to  termination  by the Portfolio or
the  borrower at any time and are,  therefore,  not  considered  to be illiquid
investments.



TIME DEPOSITS.  The Cash Portfolio may invest in time deposits  ("TDs"),  which
are  non-negotiable  receipts  issued by a bank in exchange  for the deposit of
funds.  Like a certificate of deposit,  a TD earns a specified rate of interest
over a definite period of time;  however,  it cannot be traded in the secondary
market.

CERTIFICATES OF DEPOSIT.  The Cash Portfolio also may invest in certificates of
deposit  ("CDs"),  which are negotiable  interest  bearing  instruments  with a
specific maturity.  CDs are issued by banks and thrift institutions in exchange
for the deposit of funds and  normally  can be traded in the  secondary  market
prior to maturity.  Commercial  Paper.  The  Portfolio may invest in commercial
paper,  which is the term used to  designate  unsecured  short-term  promissory
notes issued by  corporations  and other  entities.  Maturities on these issues
vary from a few days to nine months.



CORPORATE  DEBT  OBLIGATIONS.  Subject to its  respective  credit  quality  and
maturity  limitations,  the Cash  Portfolio  may  invest  in  corporate  bonds,
including  obligations  of  industrial,  utility,  banking and other  financial
issuers.  Corporate  bonds are subject to the risk of an issuer's  inability to
meet  principal  and  interest  payments  and may  also  be  subject  to  price
volatility due to such factors as market interest rates,  market  perception of
the credit worthiness of the issuer and general market liquidity.



                                     A - 9

<PAGE>

ASSET-BACKED  SECURITIES.  The Cash Portfolio  also may invest in  asset-backed
securities,  which consist of securities secured by company  receivables,  home
equity loans, truck and auto loans,  leases,  credit card receivables and other
securities backed by other types of receivables or other assets. Credit support
for  asset-backed  securities  may be based  on the  underlying  assets  and/or
provided  through  credit  enhancements  such as letters  of credit,  insurance
bonds,  limited  issuer  guarantees,  senior-subordinated  structures  and over
collateralization. Asset-backed securities are normally traded over-the-counter
and typically have a  short-intermediate  maturity  structure  depending on the
paydown  characteristics  of the underlying  financial  assets which are passed
through  to the  security  holder.  Asset-backed  securities  may be subject to
prepayment  risk,  particularly  in  a  period  of  declining  interest  rates.
Prepayments,  which occur when unscheduled  payments are made on the underlying
debt instruments,  may shorten the effective maturities of these securities and
may lower their total returns.  Asset-backed  securities  generally do not have
the benefit of a security interest in collateral that is comparable to mortgage
assets and there is the possibility  that recoveries on repossessed  collateral
may not be available to support payments on these securities. There is no limit
on the extent to which the  Portfolio  may invest in  asset-backed  securities;
however, the Portfolio will only invest in asset-backed securities that carry a
rating in the highest category from at least two NRSROs.

EURODOLLAR  AND YANKEE  DOLLAR  INVESTMENTS.  The Cash  Portfolio may invest in
Eurodollar and Yankee Dollar instruments.  Eurodollar  instruments are bonds of
foreign  corporate  and  government  issuers that pay interest and principal in
U.S.  dollars  held in banks  outside the United  States,  primarily in Europe.
Yankee Dollar instruments are U.S. dollar denominated bonds typically issued in
the U.S.  by foreign  governments  and their  agencies  and  foreign  banks and
corporations.  The Portfolio may invest in Eurodollar  Certificates  of Deposit
("ECDs"),  Eurodollar Time Deposits ("ETDs") and Yankee Certificates of Deposit
("Yankee CDs"). ECDs are U.S. dollar-denominated certificates of deposit issued
by  foreign  branches  of  domestic  banks;  ETDs are  U.S.  dollar-denominated
deposits in a foreign  branch of a U.S. bank or in a foreign  bank;  and Yankee
CDs are U.S. dollar-denominated certificates of deposit issued by a U.S. branch
of a foreign bank and held in the U.S. These investments involve risks that are
different from  investments  in securities  issued by U.S.  issuers,  including
potential unfavorable political and economic developments,  foreign withholding
or other  taxes,  seizure  of foreign  deposits,  currency  controls,  interest
limitations or other  governmental  restrictions  which might affect payment of
principal or interest.

WHEN-ISSUED  AND DELAYED  DELIVERY  TRANSACTIONS.  The Cash  Portfolio  and the
Treasury Plus  Portfolio each may invest in  when-issued  and delayed  delivery
securities,  which are  securities  purchased  for  delivery  beyond the normal
settlement  date at a stated price and yield,  thereby  involving the risk that
the yield  obtained will be less than that available in the market at delivery.
Although the purchase of securities on a  when-issued  basis is not  considered
leveraging, it has the effect of leveraging. When such a security is purchased,
the Custodian will set aside cash or liquid  securities to satisfy the purchase
commitment  unless  the  relevant  Portfolio  has  entered  into an  offsetting
agreement to sell the securities. These segregated securities will be valued at
market and  additional  cash or  securities  will be segregated if necessary so
that the market  value of the account  will  continue  to satisfy the  purchase
commitment.  A Portfolio  generally  will not pay for such  securities  or earn
interest on them until received. Commitments to purchase when-issued securities
will not, under normal market  conditions,  exceed 25% of the Portfolio's total
assets,  and a  commitment  will not  exceed  90 days.  A  Portfolio  will only
purchase  when-issued   securities  for  the  purpose  of  acquiring  portfolio
securities  and not for  speculative  purposes.  However,  a Portfolio may sell
these securities or dispose of the commitment  before the settlement date if it
is deemed  advisable as a matter of  investment  strategy.  The market value of
when-issued or delayed delivery  securities when they are delivered may be less
than the amount the Portfolios paid for them.

                                    A - 10

<PAGE>

VARIABLE AND FLOATING RATE INSTRUMENTS. Certain of the obligations purchased by
the Cash  Portfolio  and the  Treasury  Plus  Portfolio  may carry  variable or
floating rates of interest and may include variable rate master demand notes. A
floating  rate security  provides for the automatic  adjustment of its interest
rate  whenever a specified  interest  rate  changes.  A variable  rate security
provides for the automatic  establishment  of a new interest rate on set dates.
Variable and floating  rate  instruments  may include  variable  amount  master
demand  notes that permit the  indebtedness  thereunder  to vary in addition to
providing for periodic adjustments in the interest rate. There may be no active
secondary  market  with  respect to a  particular  variable  or  floating  rate
instrument.  Nevertheless,  the periodic  readjustments of their interest rates
tend to assure  that their  value to a  Portfolio  will  approximate  their par
value.  Further, some of the demand instruments purchased by a Portfolio derive
their  liquidity  from the ability of the holder to demand  repayment  from the
issuer or from a third party providing credit support.  The creditworthiness of
issuers of variable and floating  rate  instruments  and their ability to repay
principal  and interest  will be  continuously  monitored  by each  Portfolio's
investment adviser or sub-adviser.

REPURCHASE AGREEMENTS.  The Cash Portfolio and the Treasury Plus Portfolio each
may enter into  repurchase  agreements,  which are agreements by which a person
obtains a security  and  simultaneously  commits to return the  security to the
seller at an agreed upon price (including  principal and interest) on an agreed
upon date within a number of days from the date of purchase.  In  substance,  a
repurchase agreement is a loan by the Portfolio collateralized with securities.
The  lending  Portfolio's  Custodian  or its agent  will hold the  security  as
collateral for the repurchase  agreement.  All repurchase  transactions must be
collateralized  initially  at a value at least equal to 102% of the  repurchase
price and counterparties  are required to deliver additional  collateral in the
event the market value of the collateral  falls below 100%. The Portfolios bear
the risk of loss in the event the other party defaults on its  obligations  and
the  Portfolio  is  delayed  or  prevented  from its  right to  dispose  of the
collateral  securities or if the  Portfolio  realizes a loss on the sale of the
collateral  securities.  Each Portfolio will enter into  repurchase  agreements
with financial institutions deemed to present minimal risk of bankruptcy during
the term of the agreement  based on  guidelines  established  and  periodically
reviewed by the Trustees.  Each  Portfolio will not invest more than 10% of its
net assets in  repurchase  agreements  maturing in more than seven days because
such agreements would be considered "illiquid securities."

REVERSE  REPURCHASE  AGREEMENTS.  The  Cash  Portfolio  and the  Treasury  Plus
Portfolio each may borrow funds for temporary purposes by entering into reverse
repurchase agreements.  Pursuant to such agreements,  each Portfolio would sell
the securities to financial  institutions such as banks and  broker-dealers and
agree  to  repurchase  them at a  mutually  agreed-upon  date and  price.  Each
Portfolio  will enter into reverse  repurchase  agreements  to avoid  otherwise
selling  securities  during  unfavorable  market  conditions to provide cash to
satisfy redemption  requests.  At the time each Portfolio enters into a reverse
repurchase agreement,  it would place in a segregated custodial account, assets
such as cash or liquid securities,  consistent with each Portfolio's investment
restrictions  and  having a value  equal  to the  repurchase  price  (including
accrued interest),  and would  subsequently  monitor the account to ensure that
such equivalent value was maintained. Reverse repurchase agreements involve the
risk that the  counterparty  may  default  at a time when the  market  value of
securities sold by each Portfolio have increased in value.  Reverse  repurchase
agreements  are  considered by the SEC to be borrowings by the Portfolio  under
the 1940 Act.

RESTRICTED  AND ILLIQUID  SECURITIES.  The Cash Portfolio and the Treasury Plus
Portfolio  each may invest up to 10% of its net assets in illiquid  securities.
Illiquid  securities  are those  that are not  readily  marketable,  repurchase
agreements  maturing in more than seven days,  time  deposits  with a notice or
demand period of more than seven days and certain restricted securities.  Based
upon  continuing  review

                                    A - 11

<PAGE>

of the trading markets for a specific restricted security,  the security may be
determined to be eligible for resale to qualified institutional buyers pursuant
to Rule 144A under the  Securities  Act of 1933 and,  therefore,  to be liquid.
Also,  certain  illiquid  securities may be determined to be liquid if they are
found to satisfy certain relevant liquidity requirements. The Board of Trustees
of  the  Portfolio  Trust  have  adopted   guidelines  and  delegated  to  each
Portfolio's  investment  adviser  or  sub-adviser,  as  applicable,  the  daily
function of determining  and monitoring the liquidity of portfolio  securities,
including  restricted  and  illiquid  securities.  Each  Portfolio's  Board  of
Trustees,  however,  retains  oversight and is ultimately  responsible for such
determinations.  The  purchase  price  and  subsequent  valuation  of  illiquid
securities  normally  reflect a discount,  which may be  significant,  from the
market price of comparable securities for which a liquid market exists.

SHORT-TERM TRADING. Although the Cash Portfolio and the Treasury Plus Portfolio
each usually intend to hold securities purchased until maturity,  at which time
they will be redeemable at their full  principal  value plus accrued  interest,
they may, at times,  engage in short-term  trading to attempt to take advantage
of yield  variations in the  short-term  market.  Each  Portfolio also may sell
portfolio  securities  prior to maturity  based on a revised  evaluation of the
creditworthiness  of the issuer or to meet redemptions.  In the event there are
unusually  heavy  redemption  requests  due to  changes  in  interest  rates or
otherwise,  a Portfolio may have to sell a portion of its investment  portfolio
at a time when it may be  disadvantageous  to do so.  However,  each  Portfolio
believes that its ability to borrow funds to  accommodate  redemption  requests
may  mitigate in part the  necessity  for such  portfolio  sales  during  these
periods.

                                    A - 12

<PAGE>

















                                    PART B

















                                     B - 1

<PAGE>

ITEM 10.   COVER PAGE AND TABLE OF CONTENTS


                                MERRIMAC FUNDS
                              Merrimac Cash Fund
                          Merrimac Treasury Plus Fund

                                    PART B

                      STATEMENT OF ADDITIONAL INFORMATION



                                  May 1, 2000


This  Statement of Additional  Information  ("SAI") is not a Prospectus  and is
only authorized for  distribution  when preceded or accompanied by the Merrimac
Fund's (the "Trust") current Prospectus dated May 1, 2000. Financial Statements
are incorporated by reference into this SAI from the Trust's most recent Annual
Report.  This  SAI  supplements  and  should  be read in  conjunction  with the
Prospectus, a copy of which may be obtained without charge by calling the Trust
at  1-888-MERRMAC  or  writing  the  Trust  at 200  Clarendon  Street,  Boston,
Massachusetts 02116. This SAI is not an offer of any Fund for which an investor
has not received a Prospectus.

Information  about the Funds' (including the SAI) may be reviewed and copied at
the SEC's Public Reference Room in Washington,  D.C., or you may obtain copies,
upon payment of a duplicating  fee, by writing to the Public  Reference Room of
the SEC, Washington,  D.C. 20549-0102 or by electronic request at the following
E-mail address: [email protected]. You may obtain information on the operation
of the Public  Reference Room by calling the SEC at  202-942-8090.  Reports and
other information  about the Fund may be obtained on the Commission's  Internet
site at http://www.sec.gov.
        ------------------




                               TABLE OF CONTENTS

                                   Page                                   Page

Fund History                        3   Capital Stock and Other Securities 12

Description of the Funds, Their     3   Purchase, Redemption and Valuation 13
   Investments and Risks                    of Shares

Management of the Trust             6   Taxation of the Trust              14

Control Persons and Principal       8   Calculation of Performance Data    16
    Holders of Securities

Investment Advisory and Other       9   Financial Statements               17
    Services

Brokerage Allocation and Other     11   Appendix                           18
    Practices

                                     B - 2

<PAGE>

ITEM 11.  FUND HISTORY

Merrimac  Funds (the  "Trust")  is composed  of two funds:  Merrimac  Cash Fund
("Cash Fund") and Merrimac  Treasury Plus Fund ("Treasury Plus Fund") (formerly
"Merrimac Treasury Fund") (each, a "Fund" and collectively, the "Funds").

The Trust is a business trust organized under the laws of the State of Delaware
pursuant to a Master Trust Agreement dated October 30, 1996, as amended.

The Merrimac Cash Portfolio ("Cash  Portfolio") and the Merrimac  Treasury Plus
Portfolio  ("Treasury  Plus  Portfolio")  are each a series or sub-trust of the
Merrimac Master Portfolio (the "Portfolio Trust"), a common law trust organized
under New York law on October 30, 1996,  registered  as an open-end  management
investment company under the 1940 Act.

The Cash Portfolio and the Treasury Plus Portfolio are collectively referred to
as the "Portfolios."

ITEM 12.  DESCRIPTION OF THE FUNDS, THEIR INVESTMENTS AND RISKS

CLASSIFICATION

Each Fund is a diversified  open-end,  management  investment company under the
1940 Act and a separate series of the Trust.

MASTER/FEEDER  STRUCTURE. The Cash Fund invests all of its investable assets in
the Cash Portfolio. The Treasury Plus Fund invests all of its investable assets
in the Treasury Plus  Portfolio.  Both Funds are sometimes  referred to in this
SAI as feeder funds.

Each  Portfolio  has the same  investment  objective  and  restrictions  as its
corresponding  Fund.  Because the feeder funds  invest all of their  investable
assets  in their  corresponding  Portfolios,  the  description  of each  Fund's
investment  policies,  techniques,  specific investments and related risks that
follows also applies to the corresponding Portfolio.

In addition  to these  feeder  funds,  other  feeder  funds may invest in these
Portfolios,  and  information  about the other  feeder  funds is  available  by
calling 1-888-MERRMAC for each Portfolio.  The other feeder funds invest in the
Portfolios on the same terms as the Funds and bear a proportionate share of the
Portfolio's expenses. The other feeder funds may sell shares on different terms
and under a  different  pricing  structure  than the Funds,  which may  produce
different investment results.

There are  certain  risks  associated  with an  investment  in a  master-feeder
structure.  Large scale  redemptions  by other feeder funds in a Portfolio  may
reduce the  diversification of a Portfolio's  investments,  reduce economies of
scale and increase a Portfolio's  operating expenses.  If the Portfolio Trust's
Board of Trustees approves a change to the investment  objective of a Portfolio
that is not approved by the Trust's Board of Trustees, a Fund would be required
to withdraw  its  investment  in the  Portfolio  and engage the  services of an
investment  adviser or find a substitute  master fund.  Withdrawal  of a fund's
interest  in its  Portfolio,  which may be  required  by the  Trust's  Board of
Trustees without shareholder  approval,  might cause the fund to incur expenses
it would not otherwise be required to pay.

                                     B - 3

<PAGE>

INVESTMENT STRATEGIES AND RISKS



MATURITY  AND  DURATION.  Duration  of an  individual  portfolio  security is a
measure of the security's price  sensitivity  taking into account expected cash
flow  and  prepayments  under a wide  range  of  interest  rate  scenarios.  In
computing  the  duration a  Portfolio  will have to  estimate  the  duration of
obligations  that are subject to  prepayment or redemption by the issuer taking
into account the influences of interest rates on prepayments and coupon flows.

Each of the Portfolios has a policy of investing in instruments with maturities
of 397 days or less. For purposes of complying with this policy, each Portfolio
will   determine  the  maturity  of  an  instrument  in  accordance   with  the
requirements  of Rule 2a-7 under the 1940 Act. Rule 2a-7 permits each Portfolio
to shorten the maturity of a particular  instrument in  circumstances  in which
the instrument is subject to certain types of demand features or  interest-rate
reset provisions.

EXCHANGE COMMERCIAL NOTES ("ECNs"). The Cash Portfolio may invest in ECNs. ECNs
are  short-term (90 days or less)  securities  that  automatically  extend to a
390-day maximum  maturity if the issuer does not redeem the ECNs on the Initial
Redemption Date (the equivalent of a commercial paper maturity).  The extension
feature  substitutes for bank back-up.  Investors  receive a premium for giving
the  issuer the option to extend the  maturity.  However,  investors  receive a
sizeable  additional  premium if the maturity is extended.  ECNs carry the same
credit rating(s) as the issuer's commercial paper.

FUNDING  AGREEMENTS.  The Cash  Portfolio may invest in funding  agreements.  A
funding  agreement is, in substance,  an obligation of indebtedness  negotiated
privately  between an investor and an  insurance  company.  Funding  agreements
often have  maturity-shortening  features,  such as an unconditional  put, that
permit the investor to require the  insurance  company to return the  principal
amount of the funding  agreement,  together with accrued  interest,  within one
year or less. Most funding agreements are not transferable by the investor and,
therefore, are illiquid,  except to the extent the funding agreement is subject
to a demand feature of seven days or less. An insurance  company may be subject
to special protections under state insurance laws, which protections may impair
the ability of the  investor to require  prompt  performance  by the  insurance
company of its payment obligations under the funding agreement.



MONEY  MARKET   INSTRUMENTS  AND  REPURCHASE   AGREEMENTS.   The  money  market
instruments  in which  the  Cash  Portfolio  invests  include  short-term  U.S.
Government  Securities  (defined  below),  commercial paper  (promissory  notes
issued by corporations to finance their  short-term  credit needs),  negotiable
certificates  of  deposit,   non-negotiable   fixed  time  deposits,   bankers'
acceptances  and repurchase  agreements.  The Treasury Plus  Portfolio  invests
substantially  all of its assets in direct  obligations of the U.S. Treasury in
U.S. Government Securities and in repurchase agreements.

U.S.  Government  Securities include securities which are direct obligations of
the U.S.  Government  backed by the full faith and credit of the United States,
and securities issued by agencies and instrumentalities of the U.S. Government,
which may be guaranteed by the U.S. Treasury or supported by the issuer's right
to borrow from the U.S.  Treasury or may be backed by the credit of the federal
agency or instrumentality  itself.  Agencies and  instrumentalities of the U.S.
Government  include,  but are not limited to,  Federal Land Banks,  the Federal
Farm Credit  Bank,  the Central  Bank for  Cooperatives,  Federal  Intermediate
Credit  Banks,  Federal  Home Loan  Banks  and the  Federal  National  Mortgage
Association ("FNMA").

A repurchase  agreement is an agreement under which a Portfolio  acquires money
market  instruments  (generally U.S.  Government  Securities) from a commercial
bank, broker or dealer, subject to resale to the

                                     B - 4

<PAGE>

seller at an  agreed-upon  price and date (normally the next business day). The
resale price reflects an agreed-upon interest rate effective for the period the
instruments  are held by a Portfolio  and is unrelated to the interest  rate on
the instruments.  The instruments  acquired by a Portfolio  (including  accrued
interest) must have an aggregate market value in excess of the resale price and
will  be  held  by  the  custodian  bank  for  the  Portfolio  until  they  are
repurchased.  The Board of Trustees  of the  Portfolio  Trust will  monitor the
standards that the investment  adviser or sub-adviser will use in reviewing the
creditworthiness of any party to a repurchase  agreement with a Portfolio.  See
"Investment Advisory Services" for information regarding the investment adviser
and sub-adviser.

The use of repurchase  agreements  involves certain risks. For example,  if the
seller defaults on its obligation to repurchase the  instruments  acquired by a
Portfolio at a time when their market value has declined, a Portfolio may incur
a  loss.  If  the  seller  becomes  insolvent  or  subject  to  liquidation  or
reorganization  under  bankruptcy or other laws, a court may determine that the
instruments  acquired by a Portfolio are  collateral  for a loan by a Portfolio
and therefore are subject to sale by the trustee in bankruptcy.  Finally, it is
possible that a Portfolio may not be able to  substantiate  its interest in the
instruments  it  acquires.  It is expected  that these risks can be  controlled
through careful documentation and monitoring.

"WHEN-ISSUED" AND "DELAYED DELIVERY"  SECURITIES.  Each Portfolio may invest in
securities  purchased on a "when-issued" or "delayed delivery" basis.  Delivery
and payment for securities purchased on a when-issued or delayed delivery basis
will normally take place 15 to 45 days after the date of the  transaction.  The
payment  obligation  and interest rate on the  securities are fixed at the time
that a Portfolio enters into the commitment,  but interest will not accrue to a
Portfolio until delivery of and payment for the securities.  Although each such
Portfolio  will only make  commitments to purchase  "when-issued"  and "delayed
delivery"  securities with the intention of actually  acquiring the securities,
each such  Portfolio  may sell the  securities  before the  settlement  date if
deemed advisable by their investment adviser or sub-adviser. Each Portfolio may
also,  with respect to up to 25% of its total assets,  enter into  contracts to
purchase securities for a fixed price at a future date beyond customary
settlement time.

Unless the  Portfolios  have entered into an  offsetting  agreement to sell the
securities  purchased on a "when-issued" or "forward commitment" basis, cash or
liquid  obligations  with a market  value equal to the amount of a  Portfolio's
commitment will be segregated with a Portfolio's  custodian bank. If the market
value of these  securities  declines,  additional  cash or  securities  will be
segregated  daily  so  that  the  aggregate  market  value  of  the  segregated
securities equals the amount of a Portfolio's commitment.

Securities purchased on a "when-issued" and "delayed delivery" basis may have a
market  value on delivery  which is less than the amount  paid by a  Portfolio.
Changes  in  market  value may be based  upon the  public's  perception  of the
creditworthiness  of the  issuer or  changes  in the level of  interest  rates.
Generally,  the  value  of  "when-issued",  ,"delayed  delivery"  and  "forward
commitment"  securities will fluctuate  inversely to changes in interest rates,
i.e.,  they will  appreciate in value when interest rates fall and will decline
in value when interest rates rise.

FUND POLICIES

The Funds and the Portfolios have adopted the following  fundamental  policies.
Each of the  Fund's  and  Portfolio's  fundamental  policies  cannot be changed
unless the change is approved by a "vote of the outstanding  voting securities"
of a Fund or a Portfolio, as the case may be, which phrase as used herein means
the lesser of (i) 67% or more of the voting  securities  of a Fund or Portfolio
present at a meeting, if

                                     B - 5

<PAGE>

the holders of more than 50% of the outstanding  voting securities of a Fund or
Portfolio  are present or  represented  by proxy,  or (ii) more than 50% of the
outstanding voting securities of a Fund or Portfolio.

As a matter of fundamental  policy,  the Cash Portfolio (Fund) and the Treasury
Plus Portfolio (Fund) may not:

        (1) purchase any securities that would cause more than 25% of the total
        assets of the  Portfolio at the time of such purchase to be invested in
        securities of one or more issuers  conducting their principal  business
        activities in the same  industry,  provided that there is no limitation
        with  respect  to  U.S.  Government  Securities,  bank  obligations  or
        repurchase  agreements  collateralized  by any of such  obligations  as
        applicable;

        (2) borrow money,  except as a temporary  measure for  extraordinary or
        emergency  purposes  or  to  facilitate   redemptions,   provided  that
        borrowing  does not  exceed an amount  equal to 33 1/3% of the  current
        value  of  the   Portfolio's   assets  taken  at  market  value,   less
        liabilities, other than borrowings;

        (3)  purchase  securities  on margin  (except for  delayed  delivery or
        when-issued  transactions or such  short-term  credits as are necessary
        for the clearance of transactions);

        (4) make  loans to any  person  or firm;  provided,  however,  that the
        making of a loan shall not include entering into repurchase agreements,
        and provided further that a Portfolio may lend its portfolio securities
        to  broker-dealers  or other  institutional  investors if the aggregate
        value of all securities  loaned does not exceed 33 1/3% of the value of
        a Portfolio's total assets;

        (5) engage in the business of  underwriting  the  securities  issued by
        others,  except that a  Portfolio  will not be deemed to be engaging in
        the  business of  underwriting  with respect to the purchase or sale of
        securities subject to legal or contractual restrictions on disposition;

        (6) issue senior  securities,  except as  permitted  by its  investment
        objective,  policies and  restrictions,  and except as permitted by the
        1940 Act; and

        (7) purchase or sell real estate,  commodities,  or commodity contracts
        unless  acquired as a result of ownership of  securities,  and provided
        further that a Portfolio may invest in securities backed by real estate
        and in financial futures contracts and options thereon.

If any  percentage  restriction  described  above is  adhered to at the time of
investment,  a subsequent increase or decrease in the percentage resulting from
a change in the net assets of the  Portfolios  (Funds)  will not  constitute  a
violation of the restriction.  The above  restrictions also apply to each Fund,
with the exception that a Fund may invest all of its investable  assets without
limitation in its respective Portfolio.

ITEM 13.   MANAGEMENT OF THE TRUST

BOARD OF TRUSTEES

Overall  responsibility  for  management  and  supervision of the Trust and the
Funds rests with the Board of Trustees.  The Trustees  approve all  significant
agreements  between  the Trust  and the  persons  and  companies  that  furnish
services to the Trust or the Funds,  including  agreements  with its custodian,
transfer  agent,  investment  adviser,   sub-adviser  and  administrator.   The
day-to-day operations of the

                                     B - 6

<PAGE>

Funds  are  delegated  to  their  Sub-Adviser.   The  SAI  contains  background
information regarding each of the Trustees and executive officers of the Trust.

TRUSTEES AND OFFICERS.  The names,  dates of birth and principal  occupation(s)
during the last five years of the  Trustees  and  officers of the Trust and the
Portfolio  Trust are listed below.  An asterisk (*) indicates that a Trustee is
an "interested  person" of the Trust and the Portfolio Trust, as defined in the
1940 Act.  The  business  address of the Trustees and officers of the Trust and
the Portfolio Trust is 200 Clarendon Street, Boston, Massachusetts 02116.

TRUSTEES AND OFFICERS OF THE PORTFOLIO TRUST

KEVIN J. SHEEHAN, TRUSTEE*, 6/22/51, Director since 1990, President June 1992 -
present,  Chairman and Chief Executive  Officer June 1995 - present,  Investors
Bank & Trust Company, Chairman and Chief Executive Officer June 1995 - present,
Investors Financial Services Corp.



FRANCIS J. GAUL, JR., TRUSTEE,  9/25/43,  Private Investor July 1998 - present,
Director and Principal,  Triad Investment  Management  Company June 1997 - June
1998,  Vice  President,   Triad  Investment   Management  Company   (Registered
Investment  Adviser) July 1996 - May 1997,  Vice President & Resident  Manager,
Goldman  Sachs & Co.  (Investment  Banking &  Institutional  Sales) June 1993 -
January 1995.



EDWARD F. HINES, JR., TRUSTEE,  9/5/45, Partner 1977 - present,  Choate, Hall &
Stewart.

THOMAS E. SINTON,  TRUSTEE,  8/26/32,  Retired,  Managing  Director,  Corporate
Accounting  Policy,  April 1993 - October 1996 and  Consultant,  January 1993 -
March 1996, Bankers Trust Company.

PAUL J. JASINSKI,  PRESIDENT,  TREASURER AND CHIEF FINANCIAL OFFICER,  2/17/47,
Managing Director, Investors Bank & Trust Company, 1990 - present.

TIMOTHY J.  COYNE,  VICE  PRESIDENT,  5/9/67,  Director,  Corporate  Marketing,
Investors  Bank & Trust  Company,  1997 - present,  Vice  President,  Corporate
Sales,  Dreyfus  Corporation,  1995 - 1997,  Assistant Vice President,  Concord
Financial Corp., 1992 - 1995.

CHRISTOPHER  J. QUINN,  ASSISTANT VICE  PRESIDENT,  5/6/66,  Manager,  Advisory
Client  Services,  Investors  Bank & Trust  Company,  1996 -  present,  Service
Specialist  Mutual Funds,  Fleet Bank, 1994 - 1996,  Executive Sales Assistant,
Concord Financial Corp., 1993 - 1994.



SUSAN C. MOSHER,  SECRETARY,  1/29/55,  Director,  Mutual Fund Administration -
Legal Administration, Investors Bank & Trust Company, 1995 - present.

SANDRA I. MADDEN, ASSISTANT SECRETARY,  8/29/66, Associate Counsel, Mutual Fund
Administration - Legal  Administration,  Investors Bank & Trust Company, 1999 -
present;  Associate Counsel at Scudder Kemper  Investments,  Inc. in the Mutual
Fund Administration Group of the Legal Department, 1996-1999.

COMPENSATION OF THE TRUSTEES AND OFFICERS.  Neither the Trust nor the Portfolio
Trust compensates the Trustees or officers of the Trust and the Portfolio Trust
who are affiliated with Investors Bank. None of the Trustees or officers of the
Trust or the Portfolio  Trust have engaged in any financial  transactions  with
the Trust or the Portfolio  Trust,  respectively,  during the fiscal year ended
December 31, 1999.

The  Trustees of the  Portfolio  Trust are paid an annual  retainer of $10,000,
payable in equal  quarterly  installments,  and a $2,500  meeting  fee for each
quarterly  meeting  attended.  Each  Fund  bears  its pro  rata  allocation  of
Trustees'  fees paid by its  corresponding  Portfolio  to the  Trustees  of the
Portfolio  Trust.  The Trustees of the Trust are paid a $1,000  meeting fee for
each quarterly meeting attended.  The following table reflects the compensation
paid by the  Trust,  by the  Portfolio  Trust and by another  related  open-end
investment  company,  to each  Trustee for the fiscal year ended  December  31,
1999.

                                     B - 7

<PAGE>


                   Aggregate        Pension or Retirement    Total Compensation
                   Compensation     Benefits Accrued as      From Trust and Fund
Name of Trustee    From the Trust   Part of Portfolio's      Complex *
- ---------------    --------------   -------------------      ------------------
                                    Expenses
                                    ---------

Kevin J. Sheehan        $0                  $0                       $0

Francis J. Gaul, Jr.    $2,033              $0                       $26,250

Edward F. Hines, Jr.    $2,033              $0                       $26,250

Thomas E. Sinton        $2,033              $0                       $26,250

Kevin J. Sheehan

*Fund Complex  consists of the Trust,  the Portfolio Trust, the Merrimac Global
Cash Fund and the Merrimac  Series,  comprising eight series as of December 31,
1999.



ITEM 14.   CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES



Control is defined by the 1940 Act as the beneficial ownership, either directly
or through  one or more  controlled  companies,  of more than 25 percent of the
voting securities of the company.

As of April 3, 2000, the Cash Fund beneficially  owned  approximately  65.9% of
the outstanding  interests of the Cash Portfolio and was, therefore,  deemed to
control the Cash Portfolio.  As of April 3, 2000,  Trustees and officers of the
Trust owned in the aggregate less than 1% of any of the Portfolios.

As of April 3, 2000 the following  entities  beneficially owned more than 5% of
the outstanding shares of the Cash Fund:

CASH FUND, PREMIUM CLASS

Name and Address                                        Percentage Ownership
of Beneficial Owner                                     Of Outstanding Shares
- -------------------                                     ---------------------

Investors Bank & Trust Co                                         62.19%
As Security Lending Agent
Attn:  Bob Jackson
Mail Code TRD 18
200 Clarendon Street
Boston, MA  02116

                                     B - 8

<PAGE>

Allmerica Financial                                              28.86 %
FBO Allmerica Financial Life Ins & Ann
Attn:  Investment Accounting N262
440 Lincoln Street
Worcester, MA  01653

Maril & Co                                                        8.95%
FBO Sec Lending
Attn:  ACM/Fund Acct
1000 N. Water Street - TR14
Milwaukee, WI  53202



CASH FUND, INSTITUTIONAL CLASS

Name and Address                                        Percentage Ownership
of Beneficial Owner                                     Of Outstanding Shares

Capital Network Services                                           100%
One Bush Street
11th Floor
San Francisco, CA  94104



As of April 3, 2000, there were no entities that  beneficially  owned more than
5% of the Treasury Plus Fund, Institutional Class.




ITEM 15.   INVESTMENT ADVISORY AND OTHER SERVICES

INVESTMENT ADVISER AND SUBADVISERS

Each Portfolio retains Investors Bank & Trust Company  ("Investors Bank" or the
"Adviser") as their investment adviser.  The Investment Adviser Agreements (the
"Adviser  Agreements")  between Investors Bank and each Portfolio provides that
Investors  Bank will manage the  operations of each  Portfolio,  subject to the
policies established by the Board of Trustees of the Trust. Investors Bank also
provides  office  space,  facilities,  equipment  and  personnel  necessary  to
supervise each  Portfolio's  operations and pays the  compensation of each such
Portfolio's  officers,  employees and directors affiliated with Investors Bank.
Each  Portfolio  pays  Investors  Bank a unitary fee for services as Investment
Adviser,  Administrator,  Custodian,  Fund Accountant and Transfer Agent. For a
description of the rate of compensation that each Portfolio pays Investors Bank
under the  Adviser  Agreements,  see  "Administrator,  Transfer  Agent and Fund
Accountant" below.



The fee earned by Investors  Bank from the Cash  Portfolio  for the fiscal year
ended December 31, 1997, December 31, 1998 and December 31, 1999 was $2,314,064
of which  $381,468  was waived,  $1,760,305  of which  $384,213  was waived and
$2,117,982,  respectively.  The fee earned by Investors  Bank from the Treasury
Plus  Portfolio  for the period  beginning  January  22, 1999  (commencemnt  of
operations) to December 31, 1999 was $397,835.

Pursuant  to  an  Investment   Sub-Adviser   Agreement  (the  "AAM  Sub-Adviser
Agreement"),  Investors  Bank has retained  Allmerica  Asset  Management,  Inc.
("AAM") as sub-adviser to the Cash  Portfolio.  AAM is compensated by Investors
Bank at no additional cost to the Cash Portfolio. Subject to the

                                     B - 9

<PAGE>

supervision of Investors  Bank and of the Portfolio  Trust's Board of Trustees,
AAM furnishes to the Cash Portfolio investment research, advice and supervision
and  determines  what  securities  will be purchased,  held or sold by the Cash
Portfolio.  AAM is rendered an annual fee, computed and paid monthly,  based on
the average net assets ("ANA") of the Cash Portfolio according to the following
schedule:  0.09% on the first $500  million  in assets;  0.07% on the next $500
million in assets, and 0.06% on assets exceeding $1 billion. Prior to September
1, 1998, the Cash Portfolio was advised by The Bank of New York ("BNY") and BNY
was paid an annual fee, computed and paid monthly, based on 0.08% of the ANA of
the Cash  Portfolio.  The amount paid by  Investors  Bank to BNY for the period
January 1, 1998 to August 31, 1998 was  $429,014.  The amount paid by Investors
Bank to AAM for the period September 1, 1998 to December 31, 1998 was $233,588.
The amount paid by Investors Bank to AAM for the fiscal year ended December 31,
1999 was $ 947,094.

Pursuant  to  an  Investment   Sub-Adviser   Agreement  (the  "M&I  Sub-Adviser
Agreement"),  Investors  Bank has  retained  M&I  Investment  Management  Corp.
("M&I") as  sub-adviser to the Treasury Plus  Portfolio.  M&I is compensated by
Investors Bank at no additional cost to the Treasury Plus Portfolio. Subject to
the  supervision  of  Investors  Bank  and of the  Portfolio  Trust's  Board of
Trustees,  M&I furnishes to the Treasury Plus  Portfolio  investment  research,
advice and supervision  and determines what securities will be purchased,  held
or sold by Treasury Plus Portfolio. M&I is rendered an annual fee, computed and
paid  monthly,  based on 0.08% of the ANA of the Treasury Plus  Portfolio.  The
amount paid by Investors Bank to M&I for the period beginning  January 22, 1999
(commencement of operations) to December 31, 1999 was $183,100.



Each Portfolio  bears the expenses of its operations  other than those incurred
by AAM or M&I,  respectively.  Among the other  expenses,  each  Portfolio pays
share pricing and shareholder  servicing fees and expenses;  custodian fees and
expenses;  legal  and  auditing  fees and  expenses;  expenses  of  shareholder
reports;  registration  and  reporting  fees and  expenses;  and the  Portfolio
Trust's Trustee fees and expenses.

ADMINISTRATOR, TRANSFER AGENT, CUSTODIAN AND FUND ACCOUNTANT

Investors Bank serves as  Administrator  to the Funds and IBT Trust & Custodial
Services (Ireland) LMTD ("IBT Ireland"), a subsidiary of Investors Bank, serves
as Administrator to the Portfolios. The services provided by Investors Bank and
IBT Ireland include certain accounting, clerical and bookkeeping services, Blue
Sky,  corporate  secretarial  services and  assistance in the  preparation  and
filing of tax returns and reports to shareholders and the SEC.

Investors Bank also serves as transfer and dividend  paying agent for the Funds
and IBT Fund Services  (Canada) Inc.,  ("IBT Canada") a subsidiary of Investors
Bank,  serves as transfer and  dividend  paying  agent for the  Portfolios.  As
transfer agent,  Investors Bank is responsible  for the issuance,  transfer and
redemption of interests,  the establishment and maintenance of accounts and the
payment  of  distributions  for each  Fund and IBT  Canada is  responsible  for
maintaining records of holders in interest and for the payment of distributions
for each Portfolio.

Investors Bank also acts as custodian for the Funds and for the Portfolios.  As
custodian,  Investors Bank holds cash, securities and other assets of the Funds
and the  Portfolios as required by the 1940 Act. IBT Canada also serves as fund
accounting  agent for the Funds and the Portfolios.  As fund accounting  agent,
IBT Canada performs certain accounting,  clerical and bookkeeping services, and
the daily calculation of net asset value for each Fund and Portfolio.



For  its  services  as  Investment  Adviser,  Administrator,   Transfer  Agent,
Custodian and Fund  Accounting

                                    B - 10

<PAGE>

Agent, each Portfolio pays Investors Bank an aggregate fee, which is calculated
daily  and  paid  monthly,  at an  annual  rate  of  0.17%  of the  ANA of such
Portfolio.  For its services as  Administrator,  Transfer Agent,  Custodian and
Fund  Accounting  Agent,  the Funds each pay Investors  Bank an aggregate  fee,
which is calculated  daily and paid monthly,  at an annual rate of 0.01% of ANA
of such Fund.  The fees paid to Investors  Bank by the Cash Fund for the fiscal
years ended  December  31,  1999,  December 31, 1998 and December 31, 1997 were
$97,092, $91,223 and $133,615, respectively. The Treasury Plus Fund had not yet
commenced operations as of December 31, 1999.



INDEPENDENT AUDITORS



For the fiscal year ended  December 31, 1999,  Ernst & Young LLP ("E&Y") served
as  independent  auditors  to  the  Trust  and  the  Portfolio  Trust.  E&Y  is
responsible  for  performing  annual  audits of the  financial  statements  and
financial   highlights  in  accordance  with  generally   accepted   accounting
standards, and preparation of the Federal tax returns.  Additionally,  pursuant
to Rule 17f-2 of the 1940 Act,  three  security  counts are  performed  for the
Portfolio Trust. The mailing address for E&Y is 200 Clarendon  Street,  Boston,
Massachusetts 02116.



COUNSEL

Goodwin,  Procter & Hoar LLP serves as  counsel to the Trust and the  Portfolio
Trust.



SHAREHOLDER SERVICING PLAN

The Board of Trustees of the Trust have adopted a  Shareholder  Servicing  Plan
(the "Servicing Plan") with respect to the  Institutional  Class shares of each
Fund after  having  concluded  that there is a reasonable  likelihood  that the
Servicing  Plan will benefit the Funds and their  shareholders.  The  Servicing
Plan provides  that the  Shareholder  Servicing  Agent shall receive a fee from
each Fund at an annual rate not to exceed 0.25% of the average daily net assets
of such Fund.  Assets of the Premium  Class shares of each Fund are not subject
to the shareholder servicing fee.

The Servicing  Plan  continues in effect if such  continuance  is  specifically
approved  at  least  annually  by a vote of both a  majority  of the  Board  of
Trustees of the Trust and a majority of the Qualified  Trustees.  The Servicing
Plan  requires that at least  quarterly,  the Treasurer of the Trust provide to
the Trustees of the Trust and that the Trustees  review a written report of the
amounts expended pursuant to the Servicing Plan and the purposes for which such
expenditures  were made. The Servicing Plan further provides that the selection
and nomination of the Trust's Qualified Trustees is committed to the discretion
of the Trust's disinterested Trustees then in office. The Servicing Plan may be
terminated at any time by a vote of a majority of the Qualified Trustees, or by
a vote of a majority of the  outstanding  voting shares of such Fund.  The Plan
may not be  amended to  increase  materially  the amount of a Fund's  permitted
expenses  thereunder  without the  approval  of a majority  of the  outstanding
voting  securities of the affected Class of such Fund and may not be materially
amended in any case without a vote of the majority of both the Trust's Trustees
and the Trust's Qualified Trustees.




ITEM 16.   BROKERAGE ALLOCATION AND OTHER PRACTICES

Purchases  and sales of  securities  for the  Portfolios  usually are principal
transactions.  Securities  are normally  purchased  directly from the issuer or
from an  underwriter or market maker for the  securities.  There usually are no
brokerage  commissions  paid  for  such  purchases.  Each  Portfolio  does  not
anticipate  paying  brokerage  commissions.   Any  transaction  for  which  the
Portfolios  pay a brokerage  commission

                                    B - 11

<PAGE>

will be  effected at the best price and  execution  available.  Purchases  from
underwriters  of  securities  include a commission  or  concession  paid by the
issuer to the  underwriter  and purchases from dealers serving as market makers
include the spread between the bid and asked price.

Allocations of transactions,  including their frequency,  to various dealers is
determined  by the  respective  Sub-Advisers  in their best  judgment  and in a
manner deemed to be in the best  interest of each Fund and the other  investors
in either  Portfolio rather than by any formula.  The primary  consideration is
prompt execution of orders in an effective manner at the most favorable price.

Investment  decisions for the Portfolios will be made  independently from those
for any other account or investment company that is or may in the future become
managed by the Sub-Advisers.  If, however,  either Portfolio and other accounts
managed by its  Sub-Adviser  are  contemporaneously  engaged in the purchase or
sale of the same  security,  the  transactions  may be averaged as to price and
allocated equitably to each account. In some cases, this policy might adversely
affect  the  price  paid or  received  by either  Portfolio  or the size of the
position obtainable for either Portfolio.  In addition, when purchases or sales
of the same  security for either  Portfolio and for other  accounts  managed by
their Sub-Adviser occur  contemporaneously,  the purchase or sale orders may be
aggregated  in  order  to  obtain  any  price  advantages  available  to  large
denomination purchases or sales.

ITEM 17.   CAPITAL STOCK AND OTHER SECURITIES

Under the Master Trust  Agreement,  the Trustees of the Trust have authority to
issue an unlimited  number of shares of beneficial  interest,  par value $0.001
per share,  of each Fund.  The Master Trust  Agreement  authorizes the Board of
Trustees to divide the shares into any number of classes or series,  each class
or   series   having   such   designations,    powers,   preferences,   rights,
qualifications,  limitations  and  restrictions,  as shall be determined by the
Board subject to the 1940 Act and other  applicable law. The shares of any such
additional  classes or series  might  therefore  differ  from the shares of the
present  class  and  series  of  capital  stock  and  from  each  other  as  to
preferences,   conversion  or  other  rights,   voting  powers,   restrictions,
limitations  as  to  dividends,   qualifications  or  terms  or  conditions  of
redemption,  subject to applicable  law, and might thus be superior or inferior
to the other classes or series in various characteristics.

The Trust generally is not required to hold meetings of its shareholders. Under
the Master  Trust  Agreement,  however,  shareholder  meetings  will be held in
connection with the following matters:  (1) the election or removal of Trustees
if a meeting is called for such  purpose;  (2) the  adoption of any  investment
advisory contract;  (3) any amendment of the Master Trust Agreement (other than
amendments changing the name of the Trust,  supplying any omission,  curing any
ambiguity or curing,  correcting or supplementing any defective or inconsistent
provision thereof);  and (4) such additional matters as may be required by law,
the Master Trust Agreement, the By-laws of the Trust or any registration of the
Trust  with the SEC or any  state,  or as the  Trust's  Trustees  may  consider
necessary  or  desirable.  The  shareholders  also would  vote upon  changes in
fundamental investment objectives, policies or restrictions.

Each Trustee serves until the next meeting of shareholders,  if any, called for
the purpose of electing  Trustees and until the election and  qualification  of
his  successor  or until such Trustee  sooner dies,  resigns or is removed by a
vote of  two-thirds  of the  shares  entitled  to vote,  or a  majority  of the
Trustees. In accordance with the 1940 Act (i) the Trust will hold a shareholder
meeting  for the  election  of Trustees at such time as less than a majority of
the Trustees have been elected by  shareholders,  and (ii) if, as a result of a
vacancy in the Board of Trustees,  less than  two-thirds  of the Trustees  have
been elected by the shareholders, that vacancy will be filled only by a vote of
the  shareholders.  A  shareholders'  meeting  shall

                                    B - 12

<PAGE>

be held for the  purpose  of voting  upon the  removal  of a  Trustee  upon the
written request of the holders of not less than 10% of the outstanding  shares.
Upon the written request of ten or more  shareholders who have been such for at
least  six  months  and  who  hold  shares  constituting  at  least  1% of  the
outstanding shares of a Fund stating that such shareholders wish to communicate
with the  other  shareholders  for the  purpose  of  obtaining  the  signatures
necessary to demand a meeting to consider  removal of a Trustee,  the Trust has
undertaken  to  disseminate   appropriate  materials  at  the  expense  of  the
requesting shareholders.

The Master Trust Agreement provides that the presence at a shareholder  meeting
in  person  or by proxy of at least  30% of the  shares  entitled  to vote on a
matter shall constitute a quorum.  Thus, a meeting of shareholders of the Trust
could  take  place  even if  less  than a  majority  of the  shareholders  were
represented  on its  scheduled  date.  Shareholders  would  in  such a case  be
permitted  to take action  which does not require a larger vote than a majority
of a quorum, such as the election of Trustees and ratification of the selection
of  auditors.  Some  matters  requiring  a larger  vote under the Master  Trust
Agreement,  such as  termination  or  reorganization  of the Trust and  certain
amendments  of the  Master  Trust  Agreement,  would  not be  affected  by this
provision;  nor would  matters  which  under the 1940 Act require the vote of a
"majority of the outstanding voting securities" as defined in the 1940 Act.

The Master Trust  Agreement  specifically  authorizes  the Board of Trustees to
terminate the Trust (or any series Fund thereof) by notice to the  shareholders
without  shareholder  approval.  The Board of Trustees  may by amendment to the
Master  Trust  Agreement  add to,  delete,  replace  or  otherwise  modify  any
provisions  relating to any series or class,  provided that before adopting any
such amendment without shareholder  approval,  the Board of Trustees determined
that  it  was  consistent  with  the  fair  and  equitable   treatment  of  all
shareholders  and, if shares have been issued,  shareholder  approval  shall be
required to adopt any  amendments  which would  adversely  affect to a material
degree the rights and preferences of the shares of any series or class.

Each share of a Fund has equal voting  rights with every other share of a Fund,
and all shares of a Fund vote as a single group except where a separate vote of
any class is required by the 1940 Act, the laws of the State of  Delaware,  the
Master Trust  Agreement or the  By-Laws,  or as the Board may  determine in its
sole discretion.  Where a separate vote is required with respect to one or more
classes,  then the shares of all other classes vote as a single class, provided
that,  as to any matter  which does not affect  the  interest  of a  particular
class,  only the  holders  of shares  of the one or more  affected  classes  is
entitled to vote.

Interests in each  Portfolio have no preemptive or conversion  rights,  and are
fully  paid and  non-assessable,  except  as set forth in the  Prospectus.  The
Portfolio  Trust  normally will not hold meetings of holders of such  interests
except as required under the 1940 Act. The Portfolio Trust would be required to
hold a meeting of holders in the event that at any time less than a majority of
its Trustees  holding  office had been elected by holders.  The Trustees of the
Portfolio Trust continue to hold office until their  successors are elected and
have  qualified.  Holders  holding a specified  percentage  of  interests  in a
Portfolio  may call a meeting of holders in such  Portfolio  for the purpose of
removing any Trustee.  A Trustee of the  Portfolio  Trust may be removed upon a
majority vote of the interests held by holders in the Portfolio Trust qualified
to vote in the election.  The 1940 Act requires the  Portfolio  Trust to assist
its holders in calling such a meeting. Upon liquidation of a Portfolio, holders
in a  Portfolio  would be  entitled  to share pro rata in the net assets of the
Portfolio available for distribution to holders.  Each holder in a Portfolio is
entitled to a vote in proportion to its percentage interest in such Portfolio.

If at any  time a Fund  receives  notice  of a  meeting  of  shareholders  of a
Portfolio in which the Fund invests,  the Fund will seek  instructions from its
shareholders with regard to the voting of the Fund's interests in the Portfolio
and  will  vote  such   interests  in   accordance   with  such   instructions.
Alternatively, the Fund may elect to vote its interests in the Portfolio in the
same proportion as the vote of all other

                                    B - 13

<PAGE>

holders of interests in the Portfolio.

ITEM 18.   PURCHASE, REDEMPTION AND VALUATION OF SHARES

PURCHASE AND REDEMPTION OF SHARES

Information  on how to  purchase  and  redeem  shares and the time at which net
asset value of each share is determined is included in the Prospectus.

The Trust may suspend  the right to redeem Fund shares or postpone  the date of
payment  upon  redemption  for more than seven  days (i) for any period  during
which the New York Stock  Exchange  ("NYSE") and the New York  Federal  Reserve
Bank ("Fed") are closed (other than customary  weekend or holiday  closings) or
trading on the  exchange is  restricted;  (ii) for any period  during  which an
emergency  exists as a result of which disposal by the Fund of securities owned
by it or  determination  by the  Fund of the  value  of its net  assets  is not
reasonably  practicable;  or (iii) for such other periods as the SEC may permit
for the protection of shareholders of the Fund.

The  Trust  intends  to pay  redemption  proceeds  in cash for all Fund  shares
redeemed.  Portfolio  securities  paid upon  redemption  of Fund shares will be
valued at their then current  market  value.  An investor  may incur  brokerage
costs in converting  portfolio securities received upon redemption to cash. The
Portfolios  have advised the Trust that the Portfolios  will not redeem in-kind
except in  circumstances  in which a Fund is  permitted  to redeem  in-kind  or
except in the event a Fund completely withdraws its interest from a Portfolio.

VALUATION OF SHARES

The following is a description of the  procedures  used by the Funds in valuing
their assets.

The investment securities in each Portfolio are valued based upon the amortized
cost  method  which  involves  valuing a  security  at its cost and  thereafter
assuming a constant  amortization  to  maturity  of any  discount  or  premium.
Although the amortized cost method  provides  consistency in valuation,  it may
result in  periods  during  which the stated  value of a security  is higher or
lower than the price that each  Portfolio  would  receive if the security  were
sold.  This method of valuation is used in order to stabilize the NAV of shares
of either Fund at $1.00; however,  there can be no assurance that either Fund's
NAV will always remain at $1.00 per share.

ITEM 19.   TAXATION OF THE TRUST

Each Fund is treated as a separate entity for accounting and tax purposes. Each
Fund has  elected to be  treated  and to  qualify  as a  "regulated  investment
company"  ("RIC") under  Subchapter M of the Internal  Revenue Code of 1986, as
amended (the "Code"),  and intends to continue to so qualify in the future.  As
such and by complying with the applicable  provisions of the Code regarding the
sources of its income, the timing of its distributions, and the diversification
of its  assets,  each Fund will not be  subject  to  Federal  income tax on its
investment company taxable income (i.e., all taxable income, after reduction by
deductible expenses, other than its "net capital gain," which is the excess, if
any, of its net long-term  capital gain over its net  short-term  capital loss)
and net capital gain which are  distributed to  shareholders in accordance with
the timing and other requirements of the Code.

Each Portfolio is treated as a partnership for federal income tax purposes.  As
such, a Portfolio is not subject to federal income  taxation.  Instead,  a Fund
must take into account, in computing its federal

                                    B - 14

<PAGE>

income tax  liability (if any),  its share of the  Portfolio's  income,  gains,
losses, deductions, credits and tax preference items, without regard to whether
it has  received  any  cash  distributions  from its  corresponding  Portfolio.
Because a Fund invests its assets in its corresponding Portfolio, the Portfolio
normally  must  satisfy  the  applicable  source of income and  diversification
requirements  in  order  for its  corresponding  Fund  to  satisfy  them.  Each
Portfolio will allocate at least annually among its investors,  each investor's
distributive  share of the  Portfolio's  net  investment  income,  net realized
capital gains, and any other items of income,  gain, loss, deduction or credit.
A  Portfolio  will  make  allocations  to its  corresponding  Fund in a  manner
intended  to  comply  with the Code and  applicable  regulations  and will make
moneys available for withdrawal at appropriate times and in sufficient  amounts
to enable the Fund to satisfy the tax distribution  requirements  that apply to
the Fund and that must be satisfied  in order to avoid  Federal  income  and/or
excise tax on the Fund. For purposes of applying the  requirements  of the Code
regarding  qualification  as a RIC,  each Fund  will be  deemed  (i) to own its
proportionate  share of each of the assets of its  corresponding  Portfolio and
(ii) to be entitled to the gross income of the Portfolio  attributable  to such
share.

Each Fund will be subject to a 4% non-deductible  federal excise tax on certain
amounts  not  distributed  (and not treated as having  been  distributed)  on a
timely basis in accordance with annual minimum distribution requirements.  Each
Fund intends under normal circumstances to seek to avoid liability for such tax
by satisfying such distribution  requirements.  Certain  distributions  made in
order to satisfy the Code's distribution requirements may be declared by a Fund
during  October,  November or December but paid during the  following  January.
Such  distributions  will be taxable to taxable  shareholders as if received on
December 31 of the year the distributions are declared, rather than the year in
which the distributions are received.

At the  discretion  of the officers of a Fund,  each Fund will  distribute  net
realized capital gains. For federal income tax purposes, a Fund is permitted to
carry  forward a net  capital  loss in any year to offset  its own net  capital
gains,  if any,  during the eight years  following the year of the loss. To the
extent  subsequent net capital gains are offset by such losses,  they would not
result in federal income tax liability to a Fund and, as noted above, would not
be distributed as such to shareholders.

If a Portfolio invests in zero coupon  securities,  certain  increasing rate or
deferred interest securities or, in general,  other securities with an original
issue discount (or with market  discount if an election is in effect to include
market discount in income currently),  the Portfolio must accrue income on such
investments prior to the receipt of the corresponding  cash payments.  However,
the Fund must distribute,  at least annually,  all or substantially  all of its
net income,  including  its  distributive  share of such income  accrued by the
Portfolio,  to shareholders to qualify as a regulated  investment company under
the Code and avoid federal  income and excise taxes.  Therefore,  the Portfolio
may  have  to  dispose  of  its  portfolio  securities  under   disadvantageous
circumstances to generate cash, or may have to leverage itself by borrowing the
cash, to enable the Fund to satisfy the distribution requirements.

Distributions  from a  Fund's  current  or  accumulated  earnings  and  profits
("E&P"),  as  computed  for  Federal  income tax  purposes,  will be taxable as
described in the Prospectus whether taken in shares or in cash.  Distributions,
if any, in excess of E&P will constitute a return of capital,  which will first
reduce an investor's tax basis in Fund shares and thereafter  (after such basis
is reduced to zero) will  generally  give rise to capital  gains.  Shareholders
electing to receive  distributions in the form of additional shares will have a
cost basis for federal  income tax purposes in each share so received  equal to
the amount of cash they would have  received  had they  elected to receive  the
distributions in cash, divided by the number of shares received.

It is anticipated that, due to the nature of each Portfolio's  investments,  no
portion of any Fund's

                                    B - 15

<PAGE>

distributions  will generally qualify for the dividends received  deduction.  A
Fund's distributions to its corporate shareholders would potentially qualify in
their hands for the corporate dividends received deduction,  subject to certain
holding period  requirements  and limitations on debt financing under the Code,
only to the extent the Fund was allocated  dividend income of its corresponding
Portfolio from stock investments in U.S. domestic corporations.

Dividends   and  certain  other   distributions   may  be  subject  to  "backup
withholding" of federal income tax at a 31% rate for  shareholders  who fail to
provide required  taxpayer  identification  numbers or related  certifications,
provide incorrect information, or are otherwise subject to such withholding.

Different tax treatment,  including  penalties on certain excess  contributions
and deferrals,  certain  pre-retirement and  post-retirement  distributions and
certain  prohibited  transactions,   is  accorded  to  accounts  maintained  as
qualified  retirement plans.  Shareholders should consult their tax adviser for
more information.

The  foregoing  discussion  relates  solely to U.S.  Federal  income tax law as
applicable to U.S. persons (i.e.,  U.S. citizens or residents and U.S. domestic
corporations,  partnerships,  trusts or estates) subject to tax under such law.
The  discussion  does not address  special tax rules  applicable to any foreign
investors  (who may be subject to  withholding or other taxes) or certain other
classes of investors,  such as tax-exempt entities,  insurance  companies,  and
financial institutions. Dividends, capital gain distributions, and ownership of
or gains realized on the redemption  (including an exchange) of Fund shares may
also be subject to state and local taxes.  A state income (and  possibly  local
income and/or intangible  property) tax exemption is generally available to the
extent,  if any, the Fund's  distributions are derived from interest on (or, in
the case of intangible  property taxes, the value of its assets is attributable
to) investments in certain U.S. Government Securities,  provided in some states
that certain  thresholds  for  holdings of such  obligations  and/or  reporting
requirements  are  satisfied.  Shareholders  should  consult their tax advisers
regarding the applicable requirements in their particular states, including the
effect, if any, of the Fund's indirect ownership (through the Portfolio) of any
such obligations,  the Federal,  and any other state or local, tax consequences
of ownership of shares of, and receipt of distributions from, the Fund in their
particular circumstances.

ITEM 21.   CALCULATION OF PERFORMANCE DATA

From  time to time,  each  Fund may quote its  "yield"  and  "effective  yield"
information in reports and other  communications  to  shareholders  and compare
their  performance  figures to those of other  funds or accounts  with  similar
objectives  and to  relevant  indices.  Such  performance  information  will be
calculated as described  below.  Yield  quotations  are expressed in annualized
terms and may be quoted on a compounded basis.

YIELD

The current yield for each Fund is computed by (a)  determining  the net change
in the  value of a  hypothetical  pre-existing  account  in the  Fund  having a
balance of one share at the beginning of a seven  calendar day period for which
yield is to be quoted;  (b) dividing the net change by the value of the account
at the  beginning  of the  period to obtain  the base  period  return;  and (c)
annualizing the results (i.e., multiplying the base period return by 365/7).

                                    B - 16

<PAGE>



The Funds' 7-day yield for the period ended December 31, 1999 was as follows:

    -----------------------------------------------------------------------
        CLASS           CASH FUND               TREASURY PLUS FUND
    -----------------------------------------------------------------------
       Premium            5.68%                       N/A*
    -----------------------------------------------------------------------
     Institutional        5.43%                       N/A*
    -----------------------------------------------------------------------
*The Treasury Plus Fund had not yet commenced operations as of December 31,
1999.  The Institutional Class of the Treasury Plus Fund commenced operations
on January 22, 1999.



EFFECTIVE YIELD

In addition,  each Fund may calculate a compound effective  annualized yield by
determining the net change in the value of a hypothetical  pre-existing account
in the Fund having a balance of one share at the beginning of a seven  calendar
day period for which yield is to be quoted according to the following formula:

    Effective Yield = [( Base Period return +1 ) (365/7 exponentional power)] -
    1 (i.e. adding 1 to the base period return (calculated as described above),
    raising the sum to a power equal to 365/7 and subtracting 1.)

The net change in the value of the  account  reflects  the value of  additional
shares,   but  does  not  include  realized  gains  and  losses  or  unrealized
appreciation and depreciation.



The Funds' 7-day effective yield for the period ended December 31, 1999, was as
follows:

- -----------------------------------------------------------------------
        CLASS           CASH FUND               TREASURY PLUS FUND
    -----------------------------------------------------------------------
       Premium            5.84%                       N/A*
    -----------------------------------------------------------------------
     Institutional        5.58%                       N/A*
    -----------------------------------------------------------------------
*The Treasury Plus Fund had not yet commenced operations as of December 31,
1999.  The Institutional Class of the Treasury Plus Fund commenced operations
on January 22, 1999.



Each  Fund's  performance  will vary from time to time  depending  upon  market
conditions, the composition of the Fund's portfolio and its operating expenses.
Consequently,  any given  performance  quotation  should not be  considered  as
representative of a Fund's  performance for any specified period in the future.
Performance  information  may be useful as a basis for  comparison  with  other
investment alternatives.  However, a Fund's performance will fluctuate,  unlike
certain bank deposits or other investments which pay a fixed yield for a stated
period of time.

ITEM 22.   FINANCIAL STATEMENTS



The Cash Fund's financial statements contained in the 1999 Annual Report of the
Trust have been  audited by Ernst & Young LLP,  independent  auditors,  and are
incorporated  by  reference  into this SAI.  Copies of the Trust's  1999 Annual
Report may be obtained by calling 1-888-MERRMAC.



                                    B - 17

<PAGE>

                                   APPENDIX

DESCRIPTION OF COMMERCIAL PAPER RATINGS

The following  descriptions  of short-term  debt ratings have been published by
Standard & Poor's  Ratings  Service  ("Standard & Poor's"),  Moody's  Investors
Service  ("Moody's"),  Fitch's IBCA Investors Service  ("Fitch"),  and Duff and
Phelps ("Duff"),  respectively. These obligations have an original maturity not
exceeding thirteen months, unless explicitly noted.

A -- Standard & Poor's  commercial paper rating is a current  assessment of the
likelihood  of timely  payment of debt  considered  short-term  in the relevant
market.  Commercial  paper issues rated A-1 by Standard & Poor's reflect a very
strong degree of safety of timely  payment.  Commercial  paper issues rated A-2
reflect a strong  degree of safety of timely  payment  but not as strong as for
issues designated A-1.

Commercial paper issues rated Prime-1 by Moody's are judged by Moody's to be of
the  "highest"  quality  on the basis of  relative  repayment  capacity  with a
superior  ability  for  repayment  of  senior   short-term  debt   obligations.
Commercial  paper  issues  rated  Prime-2  are  judged by  Moody's to be of the
"second  highest"  quality  with a  strong  ability  for  repayment  of  senior
short-term debt obligations.

The rating Fitch-1 (Highest Grade) is the highest commercial rating assigned by
Fitch.  Paper  rated  Fitch-1 is  regarded  as having the  strongest  degree of
assurance  for timely  payment.  Commercial  paper  issues  rated  Fitch-2  are
regarded as having only a slightly less  assurance of timely payment than those
issues rated Fitch-1.

The rating  Duff-1 is the highest  commercial  paper  rating  assigned by Duff.
Paper rated Duff-1 is regarded as having very high  certainty of timely payment
with excellent  liquidity factors that are supported by ample asset protection.
Risk factors are minor.  The rating Duff-2 is regarded as having good certainty
of  timely  payment  with  sound  liquidity  factors  supported  by good  asset
protection. Risk factors are small.

DESCRIPTION OF LONG-TERM DEBT RATINGS

The following is a description of Moody's debt instrument ratings:

Aaa -- Bonds  which are rated Aaa are  judged to be of the best  quality.  They
carry the smallest degree of investment  risk and are generally  referred to as
"gilt edged". Interest payments are protected by a large or by an exceptionally
stable margin and principal is secure.  While the various  protective  elements
are likely to change,  such changes as can be  visualized  are most unlikely to
impair the fundamentally strong position of such issues.

Aa --  Bonds  which  are  rated  Aa are  judged  to be of high  quality  by all
standards.  Together with the Aaa group they comprise what are generally  known
as high-grade  bonds.  They are rated lower than the best bonds because margins
of  protection  may not be as  large as in Aaa  securities  or  fluctuation  of
protective  elements may be of greater amplitude or there may be other elements
present  which make the  long-term  risk  appear  somewhat  larger than the Aaa
securities.

Moody's  applies  numerical  modifiers  1,  2  and  3 in  each  generic  rating
classification.  The  modifier 1  indicates  that the  obligation  ranks in the
higher end of its generic rating category;  the modifier 2 indicates

                                    B - 18

<PAGE>

a midrange ranking;  and the modifier 3 indicates a ranking in the lower end of
that generic rating category.

The following is a description of Standard & Poor's debt instrument ratings:

Standard & Poor's  ratings  are based,  in varying  degrees,  on the  following
considerations:  (i) the  likelihood of default -- capacity and  willingness of
the obligor as to the timely  payment of interest and repayment of principal in
accordance with the terms of the obligations; (ii) the nature of and provisions
of the obligation;  and (iii) the protection afforded by, and relative position
of,  the  obligation  in the  event  of  bankruptcy,  reorganization,  or other
arrangement  under the laws of bankruptcy and other laws  affecting  creditors'
rights.

AAA -- Debt rated AAA has the  highest  rating  assigned  by Standard & Poor's.
Capacity to pay interest and repay principal is extremely strong.

AA -- Debt  rated AA has a very  strong  capacity  to pay  interest  and  repay
principal and differs from the highest rated issues only in small degree.

Plus (+) or minus (-): The ratings may be modified by the addition of a plus or
minus sign to show relative standing within the major rating categories.

THOMSON BANK WATCH SHORT-TERM DEBT RATINGS

Thomson Bank Watch  ratings  represent an  assessment  of the  likelihood of an
untimely  payment  of  principal  and  interest.  Important  factors  that  may
influence this  assessment are the overall  financial  health of the particular
company,  and the  probability  that the  government  will come to the aid of a
troubled institution in order to avoid a default or failure. The probability of
government intervention stems from four primary factors:

o Government Guarantees

o Government Or Quasi-Government Ownership Or Control

o The Degree Of Concentration In The Banking System

o Government Precedent

As with the Issuer  Ratings,  the  Short-Term  Debt  Ratings  incorporate  both
qualitative  and  quantitative  factors.  The  ratings  are  not  meant  to  be
"pass/fail"  but rather to provide a relative  indication of  creditworthiness.
Therefore, obligations rated TBW-3 are still considered investment-grade.

These  Short-Term  Debt  Ratings  can  also be  restricted  to  local  currency
instruments.  In such cases, the ratings will be preceded by the designation LC
for Local  Currency.  Short-Term  Debt Ratings are based on the following scale
and the definitions are:

TBW-1                                                                     LC-1
       The highest  category;  indicates a very high  likelihood that principal
       and interest will be paid on a timely basis.

                                    B - 19


<PAGE>

TBW-2                                                                     LC-2
       The second-highest category; while the degree of safety regarding timely
       repayment of principal  and interest is strong,  the relative  degree of
       safety is not as high as for issues rated TBW-1.

TBW-3                                                                     LC-3
       The  lowest   investment-grade   category;   indicates  that  while  the
       obligation is more  susceptible to adverse  developments  (both internal
       and external)  than those with higher  ratings,  the capacity to service
       principal and interest in a timely fashion is considered adequate.

TBW-4                                                                     LC-4
       The lowest rating  category;  this rating is regarded as  non-investment
       grade and therefore speculative.

THOMSON BANK WATCH LONG-TERM DEBT RATINGS

Long-Term  Debt  Ratings  assigned  by Thomson  Bank  Watch also weigh  heavily
government  ownership and support. The quality of both the company's management
and  franchise  are of even greater  importance  in the  Long-Term  Debt Rating
decisions.  Long-Term  Debt  Ratings look out over a cycle and are not adjusted
frequently for what is believed to be short-term performance aberrations.

Long-Term  Debt Ratings can be restricted to local currency debt - ratings will
be identified by the  designation  LC. In addition,  Long-Term Debt Ratings may
include a plus (+) or minus (-) to indicate where within the category the issue
is placed. Thomson Bank Watch Long-Term Debt Ratings are based on the following
scale:

INVESTMENT GRADE

AAA                                                                     LC-AAA
       Indicates  that the ability to repay  principal and interest on a timely
       basis is extremely high.

AA                                                                       LC-AA
       Indicates a very strong  ability to repay  principal  and  interest on a
       timely basis,  within limited  incremental risk compared to issues rated
       in the highest category.

A                                                                         LC-A
       Indicates the ability to repay principal and interest is strong.  Issues
       rated A could be more vulnerable to adverse  developments (both internal
       and external) than obligations with higher ratings.

BBB                                                                     LC-BBB
       The lowest investment-grade  category;  indicates an acceptable capacity
       to repay  principal  and  interest.  BBB issues are more  vulnerable  to
       adverse  developments (both internal and external) than obligations with
       higher ratings.

                                    B - 20

<PAGE>

NON-INVESTMENT GRADE - MAY BE SPECULATIVE IN THE LIKELIHOOD OF TIMELY REPAYMENT
OF PRINCIPAL AND INTEREST.

BB                                                                       LC-BB
       While not investment  grade,  the BB rating suggests that the likelihood
       of default is considerably  less than for lower-rated  issues.  However,
       there are  significant  uncertainties  that could  affect the ability to
       adequately service debt obligations.

B                                                                        LC-B
       Issues rated B show a higher degree of uncertainty and therefore greater
       likelihood of default than higher-rated issues. Adverse
       developments  could  negatively  affect  the  payment  of  interest  and
       principal on a timely basis.

CCC                                                                     LC-CCC
       Issues rated CCC clearly have a high likelihood of default,  with little
       capacity to address further adverse changes in financial circumstances.

CC                                                                       LC-CC
       CC is applied to issues that are subordinate to other  obligations rated
       CCC and are  afforded  less  protection  in the event of  bankruptcy  or
       reorganization.

D                                                                         LC-D
        Default











                                    B - 21

<PAGE>









                                    PART C


















                                     C - 1

<PAGE>

                                    PART C

Item 23.  Exhibits:

        Exhibit No.                Description
        -----------                -----------

        (a1)                       Master Trust Agreement, effective as of
                                   October 30, 1996(1)

        (a2)                       Amendment No. 1 to the Master Trust
                                   Agreement(1)

        (a3)                       Amendment No. 2 to the Master Trust
                                   Agreement(2)

        (b)                        By-Laws(1)

        (c)                        None

        (d1)                       Investment Adviser Agreement between
                                   Merrimac Master Portfolio and Investors Bank
                                   & Trust Company ("Investors Bank")(1)

        (d2)                       Investment Sub-Adviser Agreement between
                                   Investors Bank and Allmerica Asset
                                   Management, Inc. (Cash Portfolio)(3)

        (d3)                       Investment Sub-Adviser Agreement between
                                   Investors Bank and M&I Investment Management
                                   Corp. (Treasury Plus Portfolio)(3)

        (e)                        *

        (f)                        Not Applicable

        (g)                        Custodian Agreement between Registrant and
                                   Investors Bank(1)

        (h1)                       Administration Agreement between Registrant
                                   and Investors Bank(1)

        (h2)                       Transfer Agency Agreement between
                                   Registrant and Investors Bank(1)

        (i)                        *

        (j)                        *

                                     C - 2

<PAGE>

        (k)                        *

        (l)                        None

        (m1)                       Shareholder Servicing Plan (Institutional
                                   Class)(1)

        (m2)                       Shareholder Servicing Plan (Placement
                                   Class)(2)

        (m3)                       Shareholder Servicing Agreement
                                   (Institutional Class)(1)

        (m4)                       Shareholder Servicing Agreement (Placement
                                   Class)(2)

        (m5)                       Plan of Distribution (Placement Class)(2)

        (m6)                       Private Placement Agent Agreement
                                   (Placement Class)(2)

        (o1)                       Multiple Class Expense Allocation Plan
                                   (Rule 18f-3)(1)

        (o2)                       First Amended and Restated Multiple Class
                                   Expense Allocation Plan(2)



(1)  Incorporated by reference to the  Registrant's  Registration  Statement on
Form N-1A filed April 1, 1997 (Accession No. 0001029869-97-000412).

(2)  Incorporated by reference to the  Registrant's  Registration  Statement on
Form N-1A filed April 21, 1998 (Accession No. 0001029869-98-000529).



(3)  Incorporated by reference to the  Registrant's  Registration  Statement on
Form N-1A filed April 23, 1999 (Accession No. 0000897436-99-103).



*Pursuant to General  Instructions  B2 of Form N-1A, a  registration  statement
filed under only the Investment Company Act of 1940 shall consist of the facing
sheet of the Form, responses to all items of Part A and B except Items 1, 2, 3,
5 and 9 of Part A thereof,  responses to all items of Part C except Items 23(e)
and  (i)-(k)  and the  required  signatures  and all other  documents  that are
required  or  which  the  Registrant  may  file  as  part  of the  registration
statement.

                                     C - 3

<PAGE>

Item 24.  Persons Controlled by or Under Common Control with Registrant

As of the close of  business  on April 1,  2000,  the  following  are owners of
99.72% or more of the value of the  outstanding  shares  of the  Merrimac  Cash
Fund.

Merrimac Cash Fund (Premium Class)
- ----------------------------------

        Record Owner                             Percent Ownership
        ------------                             -----------------



        Investors Bank & Trust Company                 62.19%
        As Security Lending Agent
        Attn: Bob Jackson
        Mail Code TRD 18
        200 Clarendon Street
        Boston, MA 02116

        Allmerica Financial                            28.86%
        FBO Allmerica Financial Life Ins & Ann
        Attn:  Investment Accounting  N262
        440 Lincoln Street
        Worcester, MA  01653

        Maril & Co                                      8.95%
        FBO Sec Lending
        Attn:  ACM/Fund Acct
        1000 N. Water Street - TR 14
        Milwaukee, WI  53202



Merrimac Cash Fund (Institutional Class)
- ----------------------------------------

        Record Owner                             Percent Ownership
        ------------                             -----------------

        Capital Network Services                       100%
        One Bush Street, 11th Floor
        San Francisco, CA 94104



Since, as of April 1, 2000, the Merrimac Cash Fund is the owner of greater than
25% of the interests in the Merrimac Cash  Portfolio,  a series of the Merrimac
Master Portfolio,  it controls the Merrimac Cash Portfolio and the shareholders
listed above may also be deemed to control the Merrimac Cash  Portfolio.  As of
April 1, 2000, the Merrimac Treasury Plus Fund was not operational.



                                     C - 4

<PAGE>

Item 25.  Indemnification

Under  Article V of the  Registrant's  Declaration  of Trust,  the Trust  shall
indemnify,  to the fullest  extent  permitted by law  (including the 1940 Act),
each Trustee, officer or employee of the Trust (including any Person who serves
at  the  Trust's  request  as  a  director,   officer  or  trustee  of  another
organization in which the Trust has any interest as a shareholder,  creditor or
otherwise)  against all  liabilities  and expenses  (including  amounts paid in
satisfaction  of  judgments,  in  compromise,  as fines and  penalties,  and as
counsel fees) reasonably incurred by such Person in connection with the defense
or  disposition  of any  action,  suit or other  proceeding,  whether  civil or
criminal, in which such Person may be involved or with which such Person may be
threatened,  while in office or  thereafter,  by reason of such Person being or
having  been such a Trustee,  officer,  employee,  except  with  respect to any
matter as to which such Person shall have been  adjudicated  to have acted with
bad faith, willful misfeasance,  gross negligence or reckless disregard of such
Person's duties,  such  liabilities and expenses being  liabilities only of the
Portfolio Series out of which such claim for indemnification arises;  provided,
however,  that as to any matter  disposed  of by a  compromise  payment by such
Person,  pursuant to a consent decree or otherwise,  no indemnification  either
for such payment of for any other expenses  shall be provided  unless there has
been a  determination  that such Person did not engage in willful  misfeasance,
bad faith, gross negligence or reckless disregard of the duties involved in the
conduct of such  Person's  office (i) by the court or other body  approving the
settlement  or  other  disposition;  or (ii)  based  upon a review  of  readily
available facts (as opposed to a full trial-type  inquiry),  by written opinion
from independent legal counsel approved by the Trustees; or (iii) by a majority
of the Trustees who are neither  Interested Persons of the Trust nor parties to
the  matter,  based upon a review of readily  available  facts (as opposed to a
full trial-type inquiry).


Item 26.  Business and Other Connections of Investment Adviser

Investors Bank serves as investment  adviser to the Merrimac Cash Portfolio (in
which the  Merrimac  Cash Fund has invested all of its assets) and the Merrimac
Treasury Plus Portfolio (in which the Merrimac  Treasury Plus Fund has invested
all  of  its   assets).   Investors   Bank   was   organized   in   1969  as  a
Massachusetts-chartered trust company and provides domestic and global custody,
multi-currency   accounting,   institutional   transfer   agency,   performance
measurement,   foreign   exchange,   securities   lending   and   mutual   fund
administration  services to a variety of financial  asset  managers,  including
mutual fund complexes,  investment advisers, banks and insurance companies. The
business, profession,  vocation or employment of a substantial nature that each
director or officer of  Investors  Bank is or has been,  at any time during the
past two fiscal  years,  engaged in for his own  account or in the  capacity of
director, officer, employee, partner or trustee, is as follows:

                                     C - 5

<PAGE>

                                                   Business and Other Positions
Name                    Position With Adviser      Within Last Two Years
- ----                    ---------------------      ---------------------

Kevin J. Sheehan        President & Chief          Chief Executive Officer
                        Executive Officer          since June 1995;
                        President since June 1992

Michael F. Rogers       Executive Vice             since September 1993
                        President

Karen C. Keenan         Senior Vice President,     Treasurer since September
                        Chief Financial            1997; Senior Vice President
                        Officer and Treasurer      and Chief Financial Officer
                                                   since June 1995.

Edmund J. Maroney       Senior Vice President,     since July 1991
                        Technology

Robert D. Mancuso       Senior Vice President,     since September 1993
                        Marketing Client
                        Services

David F. Flynn          Senior Vice President,     since April 1992
                        Lending

John E. Henry           General Counsel &          since January 1997;
                        Secretary                  General Counsel &
                                                   Assistant Secretary
                                                   since February 1996

James M. Oates          Director                   Chairman of IBEX Capital
                                                   Markets, LLC since 1996

Thomas P. McDermott     Director                   Managing Director of TPM
                                                   Associates since 1994

Frank B. Condon         Director                   Chief Executive Officer &
                                                   Chairman of The Woodstock
                                                   Corporation from 1993 to
                                                   April 1997

Phyllis S. Swersky      Director                   President of The Meltech
                                                   Group since 1995; President
                                                   & Chief Executive Officer of
                                                   The NET Collaborative from
                                                   1996 to 1997

                                     C - 6


                                                   Business and Other Positions
Name                    Position With Adviser      Within Last Two Years
- ----                    ---------------------      ---------------------

Donald G. Friedl        Director                   President of All Seasons
                                                   from 1986 until January 1997

Robert B. Fraser        Director                   Retired, Formerly, Chairman
                                                   of Goodwin, Procter & Hoar,
                                                   LLP

Item 27.  Principal Underwriters

Not Applicable

Item 28.  Location of Accounts and Records

The accounts and records of the Registrant are located, in whole or in part, at
the office of the Registrant  and the locations set forth below.  (The Merrimac
Cash Fund and the  Merrimac  Treasury  Plus Fund are referred to as the "Funds"
and the Merrimac Cash  Portfolio and the Merrimac  Treasury Plus  Portfolio are
referred to as the Portfolios.)

Investors Bank & Trust Company
200 Clarendon  Street
Boston, MA 02116
(Investment  Adviser to the Portfolios;  Administrator,  and Transfer Agent for
the Funds; Custodian for the Funds and the Portfolios)

Allmerica Asset Management, Inc.
440 Lincoln Street
Worcester, MA  01653
(Investment Sub-Adviser to the Merrimac Cash Portfolio)

M&I Investment Management Corp.
1000 North Water Street
Milwaukee, Wisconsin 53202
(Investment Sub-Adviser to the Merrimac Treasury Plus Portfolio)

IBT Trust & Custodial Services (Ireland) LMTD
Deloitte & Touche House
29 Earlsfort Terrace
Dublin 2, Ireland
(Administrator to the Portfolios)


IBT Fund Svs (Canada) Inc.
1 First Canadian, King Street West
Suite 2800 P.O. Box 231
Toronto, CA  M5X1C8
(Transfer  Agent for the Portfolios and Fund  Accountant for the Portfolios and
the Funds)

Item 29.  Management Services

Not Applicable

Item 30.  Undertakings

Not Applicable

                                     C - 7

<PAGE>







                                  SIGNATURES


Pursuant to the  requirements  of the Investment  Company Act of 1940, the Fund
has duly caused this Amendment No. 3 to the Registration Statement on Form N-1A
to be signed on its behalf by the  undersigned,  thereto duly authorized in the
City of Boston,  and Commonwealth of Massachusetts as of the 28th day of April,
2000.



                                                MERRIMAC FUNDS



                                                /s/Paul J. Jasinski
                                                --------------------
                                                By: Paul J. Jasinski
                                                Its:  President



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