BARR ROSENBERG SERIES TRUST
DEFS14A, 1998-11-04
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<PAGE>

               FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON
                                  NOVEMBER 4, 1998


                                   SCHEDULE 14A
                                  (RULE 14A-101)
                      INFORMATION REQUIRED IN PROXY STATEMENT

                              SCHEDULE 14A INFORMATION
PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

Filed by the Registrant [ X ]
Filed by a Party other than the Registrant [  ]

Check the appropriate box:

<TABLE>

<S>                                                  <C>
[   ]   Preliminary Proxy Statement                  [  ]   Confidential, For Use of the Commission
[ X ]   Definitive Proxy Statement                          Only (as permitted by Rule 14a-6(e)(2))
[   ]   Definitive Additional Materials
[   ]   Soliciting Material Pursuant to Rule 14a-11(c) or Rule 14a-12
</TABLE>


                            BARR ROSENBERG SERIES TRUST
       ------------------------------------------------------------------------
                   (Name of Registrant as Specified In Its Charter)


       ------------------------------------------------------------------------
       (Name of Person(s) Filing Proxy Statement, if Other than the Registrant)


Payment of Filing Fee (check the appropriate box):

[ X ]   No fee required
[   ]   Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
- --------------------------------------------------------------------------------
1)      Title of each class of securities to which transaction applies:  N/A
2)      Aggregate number of securities to which transaction applies:  N/A
3)      Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the
        filing fee is calculated and state how it was determined):  N/A
4)      Proposed maximum aggregate value of transaction:  N/A
5)      Total fee paid:  N/A
- --------------------------------------------------------------------------------
[   ]   Fee paid previously with preliminary materials.
- --------------------------------------------------------------------------------
[   ]   Check box if any part of the fee is offset as provided by Exchange Act
        Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
        paid previously.  Identify the previous filing by registration statement
        number, or the Form or Schedule and the date of its filing.

1)      Amount previously paid:
2)      Form, Schedule or Registration Statement No.:
3)      Filing Party:
4)      Date Filed:

<PAGE>
                          BARR ROSENBERG SERIES TRUST
 
                 C/O ROSENBERG INSTITUTIONAL EQUITY MANAGEMENT
 
                          FOUR ORINDA WAY, BUILDING E
 
                                ORINDA, CA 94563
 
                                 (925) 254-6464
 
                            ------------------------
 
                  NOTICE OF A SPECIAL MEETING OF SHAREHOLDERS
 
                             ---------------------
 
To the Shareholders:
 
    Notice is hereby given that a Special Meeting of Shareholders (the
"Meeting") of Barr Rosenberg Series Trust, a Massachusetts business trust (the
"Trust"), will be held on December 28, 1998, at 10:00 a.m. (Pacific Time) at the
offices of Rosenberg Institutional Equity Management, Four Orinda Way, Building
E, Orinda, California 94563. At the Meeting, you and the other shareholders of
the Trust will be asked to consider and vote on the following matters:
 
    1.  To approve a new investment management agreement between each of the
        U.S. Small Capitalization Series, the International Small Capitalization
        Series, the Japan Series, the Barr Rosenberg Market Neutral Fund, the
        Barr Rosenberg Double Alpha Market Fund and the Barr Rosenberg Select
        Sectors Market Neutral Fund of the Trust and AXA Rosenberg Investment
        Management LLC, as discussed in Part I of the attached Proxy Statement.
        (Each management agreement will be voted on only by shareholders of the
        relevant series or fund.)
 
    2.  To elect two Trustees to the Board of Trustees of the Trust, as
        discussed in Part II of the attached Proxy Statement.
 
    3.  To transact such other business as may properly come before the Meeting
        or any adjournment(s) thereof.
 
    Shareholders of record at the close of business on October 29, 1998 are
entitled to notice of, and to vote at, the Meeting. Regardless of whether you
plan to attend the Meeting, PLEASE COMPLETE, SIGN AND RETURN PROMPTLY THE
ENCLOSED PROXY CARD so that a quorum will be present and the maximum number of
shares may be voted. You may change your vote by written notice to the Trust, by
submission of a subsequent proxy, or by voting in person at the Meeting.
 
                                          By Order of the Board of Trustees,
 
                                          Sara Ronan
                                          CLERK
 
ORINDA, CALIFORNIA
NOVEMBER 6, 1998
<PAGE>
                          BARR ROSENBERG SERIES TRUST
                 C/O ROSENBERG INSTITUTIONAL EQUITY MANAGEMENT
                          FOUR ORINDA WAY, BUILDING E
                                ORINDA, CA 94563
                                 (925) 254-6464
 
                                PROXY STATEMENT
 
    This Proxy Statement is being provided to the shareholders of Barr Rosenberg
Series Trust, a Massachusetts business trust (the "Trust"), in connection with
the solicitation of proxies by the Board of Trustees of the Trust (the "Board of
Trustees" or the "Trustees"). The proxies are to be used at a Special Meeting of
Shareholders (the "Meeting") to be held at the offices of Rosenberg
Institutional Equity Management, Four Orinda Way, Building E, Orinda, California
94563, on December 28, 1998 at 10:00 a.m. (Pacific Time), and any adjournment(s)
thereof, for action upon the matters set forth in the Notice of the Special
Meeting of Shareholders.
 
    The Trust currently consists of six series of shares: the U.S. Small
Capitalization Series, the International Small Capitalization Series, the Japan
Series, the Barr Rosenberg Market Neutral Fund, the Barr Rosenberg Double Alpha
Market Fund and the Barr Rosenberg Select Sectors Market Neutral Fund
(collectively, the "Funds").
 
    All shares represented by each properly signed proxy ("Proxy") received
prior to the Meeting will be voted at the Meeting. If a shareholder specifies
how the Proxy is to be voted on any of the business matters to come before the
Meeting, it will be voted in accordance with the specification. If no
specification is made, the Proxy will be voted FOR approval of the new
investment management agreement for the Fund of which you are a Shareholder
(Proposal 1) and FOR the election of the Trustees nominated by the Board of
Trustees. The Proxy may be revoked by a shareholder at any time prior to its use
by written notice to the Fund, by submission of a subsequent Proxy, or by voting
in person at the Meeting.
 
    All shareholders of record at the close of business on October 29, 1998, the
record date for the determination of shareholders entitled to vote at the
Meeting (the "Record Date"), are entitled to one vote for each share of the
Trust held, and each fractional share shall be entitled to a proportional
fractional vote. As of that date, there were issued and outstanding the
following number of shares for each Fund:
 
<TABLE>
<CAPTION>
                                                                                           SHARES ISSUED AND
NAME OF FUND                                                                                  OUTSTANDING
- ------------------------------------------------------------------------------------  ----------------------------
<S>                                                                                   <C>
U.S. Small Capitalization Series....................................................             67,396,450
International Small Capitalization Series...........................................              4,982,168
Japan Series........................................................................                192,650
Barr Rosenberg Market Neutral Fund..................................................             31,068,044
Barr Rosenberg Double Alpha Market Fund.............................................                795,975
Barr Rosenberg Select Sectors Market Neutral Fund...................................                105,002
                                                                                               ------------
    Total...........................................................................            104,540,290
                                                                                               ------------
                                                                                               ------------
</TABLE>
 
    Shareholders of each Fund will vote separately on Proposal 1 (approval of a
new management agreement for each Fund). Shareholders of all six Funds will vote
as a single class on Proposal 2 (election of Trustees). The presence at the
Meeting, in person or by proxy, of the holders of 40% of the shares of each Fund
entitled to be voted (for a Fund-by-Fund vote, such as Proposal 1), or of the
Trust (for a Trust-wide vote, such as Proposal 2) shall be necessary and
sufficient to constitute a quorum for the transaction of business. For purposes
of determining the presence of a quorum, abstentions, withheld votes or broker
"non-votes" will be counted as present. Broker "non-votes" occur when the Trust
receives a Proxy from a broker or nominee who does not have discretionary power
to vote on a particular matter and the broker or nominee has not received
instructions from the beneficial owner or other person entitled to vote the
shares represented by the Proxy. With respect to each Fund, Proposal 1 requires
the approval of a "majority of the
 
                                       1
<PAGE>
outstanding voting securities" of such Fund, as defined in the Investment
Company Act of 1940, as amended (the "1940 Act"). Abstentions and broker
"non-votes" will have the effect of a vote against Proposal 1, depending on the
number of Shares present at the meeting. With respect to Proposal 2, abstentions
and broker non-votes will not be counted in favor of or against, and will have
no other effect on the voting on, Proposal 2 except to help establish a quorum.
See "Proposal 1 - Required Vote."
 
    The solicitation will be made primarily by mail, but may be supplemented by
telephone calls, telegrams and personal interviews by officers, employees and
agents of Rosenberg Institutional Equity Management and its affiliates. The
Trust has retained D.F. King, 77 Water Street, New York, NY 10005 to aid in the
solicitation of proxies. The costs of retaining D.F. King, which are anticipated
to be approximately $10,000, and other expenses incurred in connection with the
solicitation of proxies, and the costs of holding the Meeting, will be borne by
Rosenberg Institutional Equity Management, and not by the Trust. This Proxy
Statement and the enclosed form of Proxy were first mailed to shareholders on or
about November 6, 1998.
 
                                       2
<PAGE>
    Those persons who are known to be the beneficial owners of more than five
percent of the shares of any Fund of the Trust as of October 20, 1998 are:
 
<TABLE>
<CAPTION>
                                                                                   AMOUNT OF
                                               NAME AND ADDRESS                   BENEFICIAL
NAME OF FUND                                  OF BENEFICIAL OWNER                  OWNERSHIP       PERCENT OF FUND
- ---------------------------------  -----------------------------------------  -------------------  ---------------
<S>                                <C>                                        <C>                  <C>
Japan Series--Select Class         Sandra B. Cook                                      1,248.388         13.517
                                   Trst Sandra B. Cook Family Trust
                                   U/A DTD 08/23/84
                                   1550 Oakland Avenue
                                   Piedmont, CA 94611
 
Japan Series--Select Class         Donaldson Lufkin Jenrette                           3,274.814         35.460
                                   Securities Corporation Inc.
                                   P. O. Box 2052
                                   Jersey City, NJ 07303-9998
 
Japan Series--Select Class         Henry Crew                                            967.248         10.473
                                   2558 Idaho St. Apt. 71
                                   Elko, NV 89801
 
Japan Series--Select Class         Fifth Third Bank, Custodian                         1,988.072         21.527
                                   Arthur Y. Liss
                                   IRA
                                   1400 N. Woodward Avenue 100
                                   Bloomfield, MI 48304
 
Japan Series--Institutional Class  Rosenberg Institutional Equity                    159,951.776         87.207
                                   Mgmt.
                                   Attn: Po-Len Hew Controller
                                   4 Orinda Way Ste. 300E
                                   Orinda, CA 94563-2523
 
Japan Series--Institutional Class  Koko M. Baker                                      14,362.949          7.830
                                   C/O RIEM 4 Orinda Way
                                   Orinda, CA 94563-0000
 
Barr Rosenberg Market              Resources Trust Company                           806,322.717         14.433
Neutral Fund--Investor             P. O. Box 3485
Class                              Englewood, CO 80155
 
Barr Rosenberg Double              Gary E. Whipple                                     5,544.355         26.864
Alpha Market Fund--Investor Class  5303 E. 115th Pl.
                                   Tulsa, OK 74137
</TABLE>
 
                                       3
<PAGE>
<TABLE>
<CAPTION>
                                                                                   AMOUNT OF
                                               NAME AND ADDRESS                   BENEFICIAL
NAME OF FUND                                  OF BENEFICIAL OWNER                  OWNERSHIP       PERCENT OF FUND
- ---------------------------------  -----------------------------------------  -------------------  ---------------
<S>                                <C>                                        <C>                  <C>
Barr Rosenberg Double              Arthur Wiener                                       2,517.623         12.199
Alpha Market Fund--Investor Class  102 Coleridge Street
                                   Brooklyn, NY 11235
 
Barr Rosenberg Double              Eduardo Nijensohn                                   4,310.345         20.885
Alpha Market Fund--Investor Class  and Adriana Nijensohn
                                   JTWROS
                                   545 W. Stratford
                                   Chicago, IL 60657
 
U.S. Small Capitalization          FTC and Co.                                       359,049.200         12.386
Series--Advisor Class              Attn: Datalynx House Account
                                   P. O. Box 173736
                                   Denver, CO 80217-3736
 
U.S. Small Capitalization          Smith Barney Inc.                                 401,303.564         13.844
Series--Advisor Class              333 W. 34th St. 7th Floor
                                   New York, NY 10001
 
U.S. Small Capitalization          Vanguard Fiduciary Trust Co.                      220,803.539          7.617
Series--Advisor Class              FBO Dresser-Rand Co. Rmt. Svgs.
                                   Pln. A 91621
                                   DTD 03/31/98
                                   Attn: Specialized Svcs.
                                   Unit VM 421
                                   P. O. Box 2600
                                   Valley Forge, PA 19482
 
U.S. Small Capitalization          Vanguard Fiduciary Trust Co.                      156,623.993          5.403
Series--Advisor Class              FBO M W Kellogg Co. Svg. &
                                   Invst. Pln. 91555
                                   DTD 05/01/98
                                   Attn: Specialized Svcs. Unit VM 421
                                   P. O. Box 2600
                                   Valley Forge, PA 19482
 
U.S. Small Capitalization          The Evangelical Lutherans                       3,423,117.059          5.587
Series--Institutional Class        For Jeanie Seto
                                   C/O Boston Safe Deposit Trust
                                   Attn: Scott Berard
                                   1 Cabot Road
                                   Medford, MA 02155-5158
 
U.S. Small Capitalization          Citizens Bank                                   4,463,911.055          7.286
Series--Institutional Class        C/O Trust Operations 3302021
                                   101 N. Washington Avenue
                                   Saginaw, MI 48607
 
Barr Rosenberg Select Sectors      Rosenberg Institutional Equity Management         100,000.000         99.999
Market Neutral                     Attn: Po-Len Hew Controller
Fund--Institutional Class          4 Orinda Way, Suite 300E
                                   Orinda, CA 94563
</TABLE>
 
                                       4
<PAGE>
                                 I. APPROVAL OF
                    THE NEW INVESTMENT MANAGEMENT AGREEMENTS
                                  (PROPOSAL 1)
 
    INTRODUCTION.  Rosenberg Institutional Equity Management, L.P., a California
limited partnership ("Old RIEM"), Four Orinda Way, Building E, Orinda, CA 94563,
acts as investment adviser to each Fund pursuant to separate investment
management agreements entered into by each Fund and Old RIEM (each, a "Current
Management Agreement," and, together, the "Current Management Agreements"). Old
RIEM has served as investment adviser to the Funds since each Fund's inception.
In connection with the transaction (the "Transaction") contemplated by the
Purchase Agreement dated as of October 23, 1998 (the "Purchase Agreement"), AXA
Rosenberg Group L.L.C., a newly-formed Delaware limited liability company ("AXA
Rosenberg"), is expected to become the owner of all interests in AXA Rosenberg
Investment Management LLC, a newly-formed Delaware limited liability company
("New RIEM") that will succeed to the business and affairs of Old RIEM. AXA
Investment Managers S.A., 46, Avenue de la Grande Armee, 75017 Paris, France, a
French societe anonyme ("AXA IM") wholly-owned by AXA UAP, S.A., a French
societe anonyme, or an affiliate thereof, will acquire an interest (the "AXA LLC
Interest") in AXA Rosenberg that generally entitles AXA IM to a percentage of
the profits earned by AXA Rosenberg in respect of each investment advisory
client, with the percentage ranging from 60% of the lowest profit tier to 10% of
the highest tier, and ranging, in the case of the Funds, from approximately 45%
to 23% at current fee rates (taking into account current fee waivers).
 
    The Transaction is being treated for purposes of the 1940 Act, which
regulates investment companies such as the Trust, as a change in control of Old
RIEM. The 1940 Act provides that such a change in control constitutes an
"assignment" of the Current Management Agreements. Such an "assignment" would
result in the automatic termination of the Current Management Agreements at the
closing date of the Transaction (the "Closing Date").
 
    You are now being asked to approve new investment management agreements
(each, a "New Management Agreement," and, together, the "New Management
Agreements") between your Fund and New RIEM. The management fee rate set forth
in each New Management Agreement is identical to the fee rate set forth in the
corresponding Current Management Agreement and, as described in greater detail
below, all other terms of the New Management Agreement for each Fund are
substantially identical to such Fund's Current Management Agreement. The effect
of Proposal 1 is to permit each Fund to continue to operate, following the
Transaction, under an investment management arrangement substantially identical
to that in effect immediately before the Transaction.
 
    THE TRANSACTION.  Old RIEM is a California limited partnership whose
Managing General Partner is Barr Rosenberg, whose other two general partners are
Marlis S. Fritz and Kenneth Reid, and whose limited partner is Rosenberg Alpha,
L.P. Under the terms of Old RIEM's partnership agreement, Barr Rosenberg, as
Managing General Partner, has full and exclusive charge and control of the
management, conduct and operation of Old RIEM and its business in all matters
and respects. In connection with the Purchase Agreement, Old RIEM will combine
with New RIEM and the partners of Old RIEM (the "RIEM Partners") will contribute
all their interests in New RIEM and various related businesses to AXA Rosenberg
in exchange for interests in AXA Rosenberg. In addition, AXA IM will acquire
from the RIEM Partners the AXA LLC Interest in AXA Rosenberg. The RIEM Partners
will continue to own the remaining economic interest in AXA Rosenberg. Subject
to the terms and conditions of the Purchase Agreement, the RIEM Partners will be
paid on the Closing Date an aggregate purchase price of $125 million for the AXA
LLC Interest. In addition, AXA IM is required to pay the RIEM Partners
substantial additional amounts (the "Additional Payments") in 2000 through 2002
if the earnings of AXA Rosenberg meet or exceed certain thresholds set forth in
the Purchase Agreement. AXA IM also has the option (the "Option") to purchase
from the RIEM Partners up to one-half of the interests in AXA Rosenberg that the
RIEM Partners own as of the Closing Date. The Option is exercisable between 2002
and 2008 at an exercise price based on the earnings attributable to the interest
being purchased.
 
    As a condition of the Transaction, AXA IM will, and will cause its
wholly-owned subsidiaries to, use commercially reasonable efforts to direct or
work with AXA's affiliates in the AXA Group to facilitate the
 
                                       5
<PAGE>
placing by such affiliates of an average of $2.5 billion of assets under
discretionary management by AXA Rosenberg and its subsidiaries during the first
five years after the Closing Date. In addition, after the Closing Date and
subject to certain exceptions, AXA IM will, and will use its best reasonable
efforts to cause its affiliates in the AXA Group to, utilize AXA Rosenberg as
the exclusive quantitative equity investment management unit within AXA and its
wholly-owned subsidiaries. AXA has undertaken to cause AXA IM to perform these
obligations.
 
    Old RIEM has informed the Trust that it anticipates no material changes in
the investment philosophy, policies, or strategies of the Funds. New RIEM will
continue to operate from offices in Orinda, California, with the same personnel
providing services to the Funds as before the Closing Date. In particular, the
same persons who are currently responsible at Old RIEM for design and
maintenance of Old RIEM's portfolio system and the portfolio managers
responsible for research and monitoring each Fund's characteristic performance
against the relevant benchmark are expected to perform similar functions as
officers or employees of New RIEM following the Closing Date. The Purchase
Agreement requires that the individual RIEM Partners and certain key personnel
of Old RIEM, including those responsible for the design and maintenance of Old
RIEM's portfolio system, enter into employment or consulting agreements (which
will include non-competition and/or non-solicitation and other customary
provisions) with New RIEM and/or its affiliated companies, providing assurance
that investment management continuity will be maintained.
 
    Pursuant to the limited liability company agreement of AXA Rosenberg (the
"Governance Agreement"), after the Closing Date the board of directors of AXA
Rosenberg (the "Board of Directors") will consist of ten members, five of whom
are to be designated by the RIEM Partners and five of whom are to be designated
by AXA IM. If the Board of Directors is deadlocked on an issue, such issue shall
be referred to and resolved by the Board of Members. After the Closing Date, the
Board of Members (the "Board of Members") will consist of two persons, one
nominated by AXA IM and one nominated by the RIEM Partners. Deadlocks at the
Board of Members generally will be resolved by the AXA nominee, except that
certain issues cannot be resolved without the consent of the RIEM Partners or
their nominee. As of the date of this Proxy Statement, it is expected that Barr
Rosenberg, Marlis Fritz, Jennie Paterson, Thomas Mead and Edward Lyman will be
designated by the RIEM Partners as members of the Board of Directors of AXA
Rosenberg and that Nicolas Moreau, Ronald Gould, Herve Hatt, Kevin Dolan, and
Jason Maude will be designated by AXA IM. Mr. Moreau is expected to serve as the
chief executive officer of AXA Rosenberg. The table below provides certain
information concerning Mr. Moreau and each other person who is expected to serve
on the board of directors of New RIEM.
 
<TABLE>
<CAPTION>
NAME/ADDRESS                                                      PRINCIPAL OCCUPATION
- -------------------------------------  ---------------------------------------------------------------------------
<S>                                    <C>
Nicolas Moreau (1) ..................  Managing Director, AXA Global Structured Products, AXA IM
AXA Global Structured Products
AXA Investment Managers
46, Avenue de la Grande Armee
75017 Paris
France
 
Ronald Gould (1) ....................  Managing Director, AXA IM
AXA Investment Managers
60 Gracechurch Street
London EC3V 0HR
United Kingdom
 
Herve Hatt (1) ......................  Senior Vice President, Asset Management Activities, AXA
AXA
23, Avenue Matignon
75008 Paris
France
</TABLE>
 
                                       6
<PAGE>
<TABLE>
<CAPTION>
NAME/ADDRESS                                                      PRINCIPAL OCCUPATION
- -------------------------------------  ---------------------------------------------------------------------------
<S>                                    <C>
Kevin Dolan (1) .....................  Managing Director, AXA IM
AXA Investment Managers
46, Avenue de la Grande Armee
75017 Paris
France
 
Jason Maude (1) .....................  Head of Equity Research, AXA IM
AXA Investment Managers
60 Gracechurch Street
London EC3V 0HR
United Kingdom
 
Barr Rosenberg (2) ..................  Managing General Partner, Trustee and Chief Investment Officer, Old RIEM.
 
Marlis Fritz (2) ....................  General Partner and Director of Marketing, Old RIEM.
 
Jennie Paterson (3) .................  Managing Director/Director of Marketing, Barr Rosenberg European Management
                                       Ltd.
 
Thomas Mead (2) .....................  Director of Strategy Implementation and Portfolio Engineer, Old RIEM.
 
Edward H. Lyman (2) .................  Executive Vice President, Barr Rosenberg Investment Management, Inc. and
                                       General Counsel to the Rosenberg Group of companies (the "Rosenberg
                                       Group").
</TABLE>
 
- ------------------------------
 
(1) Expected to be designated by AXA IM.
 
(2) Expected to be designated by the RIEM Partners. The principal business
    address of each is expected to be c/o AXA Rosenberg Group LLC, 4 Orinda Way,
    Suite 300E, Orinda, California 94563.
 
(3) Expected to be designated by the RIEM Partners. The principal business
    address is expected to be c/o AXA Rosenberg Investment Management Europe, 9A
    Devonshire Square, London, EC2M 4YL.
 
    Each of Old RIEM and AXA IM has informed the Trust that they will use all
commercially reasonable efforts to assure compliance with the conditions of
Section 15(f) of the 1940 Act. Section 15(f) provides a non-exclusive safe
harbor for an investment adviser or any affiliated persons to receive any amount
or benefit in connection with a change in control of the investment adviser to
an investment company as long as two conditions are met. First, no "unfair
burden" may be imposed on the investment company as a result of the transaction
relating to the change of control, or any express or implied terms, conditions
or understandings applicable thereto. As defined in the 1940 Act, the term
"unfair burden" includes any arrangement during the two-year period after the
change in control whereby the investment adviser (or predecessor or successor
adviser), or any interested person of any such adviser, receives or is entitled
to receive any compensation, directly or indirectly, from the investment company
or its security holders (other than fees for bona fide investment advisory or
other services), or from any person in connection with the purchase or sale of
securities or other property to, from, or on behalf of the investment company
(other than bona fide ordinary compensation as principal underwriter of the
investment company).
 
    The second condition of Section 15(f) is that, during the three-year period
immediately following the change of control, at least 75% of an investment
company's board of trustees must not be "interested persons" of the investment
adviser or the predecessor investment adviser within the meaning of the 1940
Act. In order to comply with this provision, the Board has recommended the
election of an additional disinterested Trustee to the Board of Trustees, as
described more fully under Proposal 2 below, and it is expected that Dr.
Rosenberg and Ms. Fritz will resign from the Board of Trustees, effective on the
Closing Date.
 
                                       7
<PAGE>
    The completion of the Transaction is contingent upon obtaining consents to
assignment of advisory agreements, or executing new advisory agreements, with
respect to assets under management constituting, by market value, not less than
90% of the assets under management by the Rosenberg Group as of the most recent
valuation date prior to the execution of the Purchase Agreement, after
subtracting all withdrawals of assets under management and adding all
contributions to assets under management occurring between October 23, 1998 and
the date the Transaction is consummated. Among the new advisory agreements for
which approval is sought are the New Management Agreements as contemplated by
Proposal 1. Other conditions precedent to the closing of the Transaction
include, among other things, that all regulatory filings, applications and
notifications have been duly and properly made or obtained. If the conditions to
the Transaction are not met and the Transaction is therefore not consummated,
the Current Management Agreement will remain in effect. In the event the New
Management Agreements are not approved by each Fund's shareholders and the
Transaction is nonetheless completed, the Board will consider appropriate
action.
 
    DESCRIPTION OF THE MANAGEMENT AGREEMENTS.  The description of the New
Management Agreements set forth herein is qualified in its entirety by the
provisions of the Form of New Management Agreement, which is attached hereto as
Exhibit A.
 
    The Current Management Agreement for the U.S. Small Capitalization Series
was last submitted to a vote of shareholders on August 1, 1996 at a special
meeting of shareholders to approve an increase in the management fee. The
Current Management Agreements of the International Small Capitalization Series
and the Japan Series were approved by the sole initial shareholder of each such
Fund in connection with the organization of such Funds in 1996 and 1988,
respectively. The Current Management Agreements of the Barr Rosenberg Market
Neutral Fund and the Barr Rosenberg Double Alpha Market Fund were approved by
the sole initial shareholder of each such Fund in connection with the
organization of such Funds in December 1997. The Current Management Agreement
for the Barr Rosenberg Select Sectors Market Neutral Fund was approved by the
sole initial shareholder of such Fund in connection with the organization of
such Fund in October 1998.
 
    It is proposed that New RIEM serve as the investment adviser to each Fund of
the Trust pursuant to a New Management Agreement between each Fund of the Trust
and New RIEM. The terms of the New Management Agreements are substantially
identical to the terms of the Current Management Agreements, except for (i)
their effective and termination dates and (ii) the parties to such agreements
(i.e., the New Management Agreements are between each Fund and New RIEM, rather
than between each Fund and Old RIEM).
 
    The compensation payable to New RIEM for its services under the New
Management Agreements will be a quarterly management fee at the following annual
percentage rates applicable to the average daily net assets of each Fund, as
determined at the close of each business day during the quarter:
 
<TABLE>
<CAPTION>
                                                                                         TOTAL FUND OPERATING EXPENSES
                                                                                      (AFTER WAIVER AND/OR REIMBURSEMENT)
                                                                 ANNUAL      ------------------------------------------------------
                                                               PERCENTAGE     INSTITUTIONAL    INVESTOR      SELECT       ADVISER
NAME OF FUND                                                      RATE           SHARES         SHARES       SHARES       SHARES
- ------------------------------------------------------------  -------------  ---------------  -----------  -----------  -----------
<S>                                                           <C>            <C>              <C>          <C>          <C>
U.S. Small Capitalization Series............................         0.90%           1.15%           N/A         1.65%        1.40%
International Small Capitalization Series...................         1.00%           1.50%          2.00%         N/A          N/A
Japan Series................................................         1.00%           1.50%          2.00%         N/A          N/A
Barr Rosenberg Market Neutral Fund..........................         1.90%           2.00%          2.50%         N/A          N/A
Barr Rosenberg Double Alpha Market Fund.....................         0.10%           2.35%          2.85%         N/A          N/A
Barr Rosenberg Select Sectors Market Neutral Fund...........         1.00%           1.25%          1.75%         N/A          N/A
</TABLE>
 
    Old RIEM has undertaken to waive its management fee and bear certain
expenses in order to limit the total annual operating expenses (exclusive of
extraordinary expenses and dividends and interest paid on securities sold short)
of each class to the percentage of each Fund's average daily net assets
attributable
 
                                       8
<PAGE>
to that class shown below. New RIEM also has voluntarily undertaken until
further notice to waive its management fee and bear certain expenses in order to
limit the total annual operating expenses (exclusive of extraordinary expenses
and dividends and interest paid on securities sold short) of each class to the
percentage of each Fund's average daily net assets attributable to that class
shown below.
 
<TABLE>
<CAPTION>
                                       TOTAL FUND OPERATING EXPENSES                 TOTAL FUND OPERATING EXPENSES
                                   (AFTER WAIVER AND/OR REIMBURSEMENT)*          (WITHOUT WAIVER AND/OR REIMBURSEMENT)
                                -------------------------------------------   -------------------------------------------
                                INSTITUTIONAL   INVESTOR   SELECT   ADVISER   INSTITUTIONAL   INVESTOR   SELECT   ADVISER
NAME OF FUND                       SHARES        SHARES    SHARES   SHARES       SHARES        SHARES    SHARES   SHARES
- ------------------------------  -------------   --------   ------   -------   -------------   --------   ------   -------
<S>                             <C>             <C>        <C>      <C>       <C>             <C>        <C>      <C>
U.S. Small Capitalization
 Series.......................      1.15%         N/A      1.65%     1.40%         1.30%         N/A     1.80%     1.55%
International Small
 Capitalization Series........      1.50%         N/A      2.00%      N/A          2.64%        3.14%     N/A       N/A
Japan Series..................      1.50%         N/A      2.00%      N/A         14.25%       14.75%     N/A       N/A
Barr Rosenberg Market Neutral
 Fund.........................      2.00%        2.50%      N/A       N/A          2.20%        2.70%     N/A       N/A
Barr Rosenberg Double Alpha
 Market Fund..................      2.35%        2.85%      N/A       N/A          2.98%        3.48%     N/A       N/A
Barr Rosenberg Select Sectors
 Market Neutral Fund..........      1.25%        1.75%      N/A       N/A          1.44%        1.94%     N/A       N/A
</TABLE>
 
- ------------------------
 
* Does not include dividends paid in connection with short sales (estimated at
0.88% for the Barr Rosenberg Market Neutral Fund's first fiscal year), which are
included in and reduce the investment return of such Fund.
 
    For the year ended March 31, 1998, advisory fees paid to Old RIEM pursuant
to the Current Management Agreements (both before and after the voluntary fee
reduction described above), which provide for advisory fee rates identical to
those set forth in the New Management Agreements, were as follows:
 
<TABLE>
<CAPTION>
                                                                     GROSS FEES                      NET FEES
                                                                       (BEFORE                        (AFTER
FUND                                                                 REDUCTION)      REDUCTION      REDUCTION)
- ----------------------------------------------------------------  -----------------  ----------  ----------------
<S>                                                               <C>                <C>         <C>
U.S. Small Capitalization Series................................    $   2,571,254    $  206,166    $  2,565,088
International Small Capitalization Series.......................    $     245,559    $  221,059    $     24,500
Japan Series....................................................    $      10,618    $   10,618    $          0
Barr Rosenberg Market Neutral Fund..............................    $     700,708    $  193,487    $    507,221
</TABLE>
 
    Under the New Management Agreements, subject to the control of the Trustees
of the Trust and such policies as the Trustees may determine, New RIEM will
furnish continuously an investment program for, and will make investment
decisions on behalf of, the Funds and place all orders for the purchase and sale
of portfolio securities. Subject to the control of the Trustees, New RIEM will
furnish office space and equipment, provide certain bookkeeping and clerical
services and pay all salaries, fees and expenses of the officers and Trustees of
the Trust who are affiliated with New RIEM.
 
    The New Management Agreements also provide that, in placing orders with
brokers or dealers, New RIEM will seek the best price and execution available,
except to the extent it may be permitted to pay higher brokerage commissions for
brokerage and research services as described below. The determination of what
may constitute best price and execution by a broker-dealer in effecting a
securities transaction involves a number of considerations, including, without
limitation, the overall net economic result to the Funds (involving price paid
or received and any commissions and other costs paid), the efficiency with which
the transaction is effected, the ability to effect the transaction at all where
a large block is involved, availability of the broker to stand ready to execute
possibly difficult transactions in the future and the financial strength and
stability of the broker. Because of such factors, a broker-dealer effecting a
transaction may be paid a commission higher than that charged by another
broker-dealer. Most of the foregoing are judgment considerations.
 
                                       9
<PAGE>
    As permitted by Section 28(e) of the Securities Exchange Act of 1934, as
amended, and subject to such policies as the Trustees of the Trust may
determine, the Manager may pay an unaffiliated broker or dealer that provides
"brokerage and research services" (as defined in the Act) to the Manager an
amount of commission for effecting a portfolio investment transaction in excess
of the amount of commission another broker or dealer would have charged for
effecting that transaction. Although the Manager does not consider the receipt
of research services as a factor in selecting brokers to effect portfolio
transactions for a Fund, the Manager will receive such services from brokers who
are expected to handle a substantial amount of a Fund's portfolio transactions.
Research services may include a wide variety of analyses, reviews and reports on
such matters as economic and political developments, industries, companies,
securities and portfolio strategy. The Manager uses such research in servicing
other clients as well as the Trust.
 
    Each New Management Agreement provides that it will continue in effect from
its initial effective date (which is expected to be as of the Closing Date,
provided that such New Management Agreement has been approved by the
shareholders of the relevant Fund) for an initial term of one year, and
thereafter with respect to such Fund only so long as such continuance is
approved at least annually by (i) the vote, cast in person at a meeting called
for such purpose, of a majority of those Trustees who are not "interested
persons" of New RIEM or the Trust, and by (ii) the majority vote of either the
full Board of Trustees or the vote of a "majority of the outstanding voting
securities" (defined below) of such Fund. Each New Management Agreement
automatically terminates on assignment, and is terminable without penalty by the
Trust or New RIEM on not more than 60 days' notice. Each New Management
Agreement may only be amended by as permitted by the 1940 Act (generally by an
affirmative vote of the holders of a "majority of the outstanding voting
securities" (defined below) of the relevant Fund).
 
    Each New Management Agreement provides that New RIEM shall not be subject to
any liability to the Trust or to any shareholder of the Trust in connection with
the performance of its services thereunder in the absence of willful
misfeasance, bad faith, gross negligence or reckless disregard of its
obligations and duties thereunder.
 
    In addition to the advisory fees described above, each Fund will pay all of
its expenses not expressly assumed by New RIEM, including, without limitation,
brokerage commissions and transfer taxes in connection with such Fund's
portfolio transactions, all applicable taxes and filing fees, distribution fees,
shareholder servicing fees, the fees and expenses for registration or
qualification of its shares under federal or state securities laws, the
compensation of trustees who are not partners, officers or employees of New
RIEM, interest charges, expenses of issue or redemption of shares, charges of
custodians, auditing and legal expenses, expenses of determining the net asset
value of Fund shares, expenses of reports to shareholders, expenses of printing
and mailing proxy statements and proxies to existing shareholders, expenses of
meetings of shareholders, expenses of printing and mailing prospectuses and
insurance premiums.
 
    REQUIRED VOTE.  Approval of each Fund's New Management Agreement will
require the affirmative vote of a "majority of the outstanding voting
securities" of that Fund (as defined in the 1940 Act), which means the
affirmative vote of the lesser of (1) more than 50% of the outstanding shares of
such Fund or (2) 67% or more of the shares of that Fund present at the meeting
if more than 50% of the outstanding shares of that Fund are represented at the
meeting in person or by proxy. If the shareholders of any Fund do not approve
its respective New Management Agreement, the Trustees will take such further
action as they may deem to be in the best interests of the shareholders of that
Fund.
 
    THE TRUSTEES UNANIMOUSLY RECOMMEND THAT SHAREHOLDERS VOTE FOR THE APPROVAL
OF THE NEW MANAGEMENT AGREEMENTS.
 
                                       10
<PAGE>
                            II. ELECTION OF TRUSTEES
                                  (PROPOSAL 2)
 
    While the Trust's Agreement and Declaration of Trust allows the existing
Trustees to elect additional individuals to the Board of Trustees, the 1940 Act
limits the percentage of Trustees who may serve without being elected by
shareholders. Dr. Sharpe and Dr. Reid have previously been elected by
shareholders. Accordingly and in light of the intention of the parties to the
Transaction that at least 75% of the Trustees not be interested persons of Old
RIEM or New RIEM (see "Proposal 1--The Transaction"), the Trustees have proposed
the election of two nominees as Trustees. The nominees for Trustee of the Trust
(the "Nominees") who are proposed for election at the Meeting are Nils H.
Hakansson and Dwight M. Jaffee. Professor Hakansson is presently a Trustee of
the Trust, having already been elected by the other Trustees on March 19, 1990.
The principal occupations and business experience for the last five years of
each Nominee for Trustee, each Trustee, and each Officer of the Trust are as
indicated in the table below.
 
    The term of office of each person elected as a Trustee will be from December
28, 1998 until the next meeting held for the purpose of electing Trustees and
until such person's successor is elected and qualified (or until such Trustee's
earlier retirement, resignation, death or disqualification). The Nominees have
agreed to serve as Trustees if elected. If either of the Nominees should be
unavailable for election at the time of the Meeting (which is not presently
anticipated), the persons named as proxies may vote for another person in their
discretion.
 
                  NOMINEES, TRUSTEES AND OFFICERS INFORMATION
 
<TABLE>
<CAPTION>
                               POSITION WITH THE
NAME, ADDRESS AND AGE                TRUST                PRINCIPAL OCCUPATIONS DURING THE PAST FIVE YEARS
- ----------------------------  --------------------  -------------------------------------------------------------
<S>                           <C>                   <C>
Nils H. Hakansson (61)        Trustee and Nominee   Sylvan C. Coleman Professor of Finance and Accounting, Haas
                              for Trustee           School of Business, University of California, Berkeley, June
                                                    1969 to present. Director, Supershare Services Corporation
                                                    (investment management), Los Angeles, California, November
                                                    1989 to 1995.
Dwight M. Jaffee (55)         Nominee for Trustee   Professor of Finance and Real Estate, Haas School of
                                                    Business, University of California, Berkeley, California,
                                                    July 1991 to present.
Kenneth Reid* (49)            President, Trustee    General Partner and Director of Research, Rosenberg
                                                    Institutional Equity Management, June 1986 to present.
Marlis S. Fritz* (49)         Vice President,       General Partner and Director of Marketing, Rosenberg
                              Trustee               Institutional Equity Management, April 1985 to present.
Barr M. Rosenberg* (55)       Trustee               Managing General Partner, Trustee and Chief Investment
                                                    Officer, Rosenberg Institutional Equity Management, January
                                                    1985 to present.
</TABLE>
 
                                       11
<PAGE>
<TABLE>
<CAPTION>
                               POSITION WITH THE
NAME, ADDRESS AND AGE                TRUST                PRINCIPAL OCCUPATIONS DURING THE PAST FIVE YEARS
- ----------------------------  --------------------  -------------------------------------------------------------
<S>                           <C>                   <C>
William F. Sharpe (64)        Trustee               STANCO 25 Professor of Finance, Stanford University,
                                                    September 1995 to present. Professor of Finance, Stanford
                                                    University, September 1992 to September 1995. Timken
                                                    Professor Emeritus of Finance, Stanford University, September
                                                    1989 to September 1992. Timken Professor of Finance, Stanford
                                                    University, September 1970 to September 1989. Chairman,
                                                    Financial Engines Incorporated, Los Altos, California
                                                    (electronic investment advice), March 1996 to present.
Po-Len Hew (32)               Treasurer             Chief Financial Officer, Rosenberg Institutional Equity
                                                    Management, April 1994 to present.
Sara Ronan (39)               Clerk                 Paralegal, Rosenberg Institutional Equity Management,
                                                    September 1997 to present; Director of Marketing, MIG Realty
                                                    Advisors, January 1996 to September 1997; Vice President,
                                                    Liquidity Financial Advisors, May 1985 to January 1996.
Edward H. Lyman (55)          Vice President        Executive Vice President, Barr Rosenberg Investment
                                                    Management, Inc., and General Counsel to the Rosenberg Group
                                                    of companies, 1990 to present.
Richard L. Saalfeld (55)      Vice President        President and Chief Executive Officer of mutual fund unit of
                                                    Rosenberg Institutional Equity Management from June 1996 to
                                                    present; Consultant to Rosenberg Institutional Equity
                                                    Management, September 1995 to May 1996; Chairman and Chief
                                                    Executive Officer of CoreLink Resources, Inc. (mutual fund
                                                    marketing organization), Concord, California, April 1993 to
                                                    August 1995; Consultant, December 1992 to March 1993.
Harold L. Arbit (52)          Vice President        Vice President and Partner, Rosenberg Alpha L.P. (the limited
                                                    partner of Old RIEM), 1984 to present.
F. William Jump, Jr. (42)     Vice President        Portfolio Engineer, Rosenberg Institutional Equity
                                                    Management, August 1990 to present.
</TABLE>
 
- ------------------------------
 
* Trustee who is an "interested person" (as defined in the 1940 Act) of the
Trust or Old RIEM. Messrs. Reid and Rosenberg and Ms. Fritz are "interested
persons" by reason of being general partners of Old RIEM.
 
    The mailing address of each of the Officers and Trustees is c/o Barr
Rosenberg Series Trust, 3435 Stelzer Road, Columbus, OH 43219.
 
    The principal occupations of the Officers and Trustees for the last five
years have been with the employers as shown above, although in some cases they
have held different positions with such employers.
 
    In connection with the Transaction, Messrs. Lyman and Reid and Ms. Fritz
will enter into employment agreements with AXA Rosenberg and/or its affiliated
companies and will therefore receive employment compensation therefrom. Dr.
Rosenberg will enter into a consulting agreement with AXA Rosenberg and/ or its
affiliated companies and will receive compensation therefrom. By virtue of these
interests and by virtue of the interests of Messrs. Rosenberg, Arbit and Reid
and Ms. Fritz in the Transaction as described under "Description of the
Transaction," each of Messrs. Rosenberg, Arbit and Reid, Ms. Fritz and Rosenberg
Alpha (of which Dr. Rosenberg and his wife are general partners and Mr. Arbit is
a limited partner) may be deemed to have a substantial interest in shareholder
approval of Proposal 1. As indicated
 
                                       12
<PAGE>
above, it is anticipated that Dr. Rosenberg and Ms. Fritz will resign from the
Board of Trustees, effective as of the Closing Date.
 
    As of October 19, 1998, those securities of the Trust that are known to be
beneficially owned by the Trustees and the Nominees for Trustee of the Trust
are:
 
<TABLE>
<CAPTION>
                                                                         AMOUNT AND NATURE OF
NAME OF FUND                                    BENEFICIAL OWNER         BENEFICIAL OWNERSHIP      PERCENT OF FUND
- -------------------------------------------  ----------------------  ----------------------------  ---------------
<S>                                          <C>                     <C>                           <C>
U.S. Small Capitalization Series                Marlis S. Fritz                     12,264 shares         *
U.S. Small Capitalization Series               Nils H. Hakansson                     2,683 shares         *
                                                                                 (held by spouse)
U.S. Small Capitalization Series               Barr M. Rosenberg                    40,119 shares         *
U.S. Small Capitalization Series               William F. Sharpe                     1,135 shares         *
International Small                             Marlis S. Fritz                     11,260 shares         *
 Capitalization Series
International Small                            Barr M. Rosenberg                    74,304 shares       1.49%
 Capitalization Series
International Small                            William F. Sharpe                     1,017 shares         *
 Capitalization Series
Japan Series                                    Marlis S. Fritz                    159,952 shares      83.02%
                                                                               (held by Old RIEM)
Japan Series                                      Kenneth Reid                     159,952 shares      83.02%
                                                                               (held by Old RIEM)
Japan Series                                   Barr M. Rosenberg                   159,952 shares      83.02%
                                                                               (held by Old RIEM)
Japan Series                                   William F. Sharpe                     1,582 shares         *
Barr Rosenberg Market Neutral Fund              Marlis S. Fritz                     21,263 shares         *
Barr Rosenberg Market Neutral Fund             Nils H. Hakansson                     4,995 shares         *
                                                                       (held jointly with spouse)
Barr Rosenberg Market Neutral Fund                Kenneth Reid                       6,051 shares         *
Barr Rosenberg Market Neutral Fund             Barr M. Rosenberg                    69,558 shares         *
Barr Rosenberg Market Neutral Fund             William F. Sharpe                       997 shares         *
                                                                       (held jointly with spouse)
Barr Rosenberg Double Alpha Market Fund         Marlis S. Fritz                     19,446 shares       2.44%
Barr Rosenberg Double Alpha Market Fund           Kenneth Reid                      54,093 shares       6.80%
Barr Rosenberg Double Alpha Market Fund        Barr M. Rosenberg                    63,615 shares       7.99%
Barr Rosenberg Double Alpha Market Fund        William F. Sharpe                     1,032 shares         *
                                                                       (held jointly with spouse)
Barr Rosenberg Select Sectors Market            Marlis S. Fritz                    100,000 shares        95%
 Neutral Fund                                                                  (held by Old RIEM)
Barr Rosenberg Select Sectors Market              Kenneth Reid                     100,000 shares        95%
 Neutral Fund                                                                  (held by Old RIEM)
Barr Rosenberg Select Sectors Market           Barr M. Rosenberg                   100,000 shares        95%
 Neutral Fund                                                                  (held by Old RIEM)
</TABLE>
 
- ------------------------------
 
*   Less than 1% of such Fund's total outstanding securities.
 
    As of October 19, 1998, the Trustees, the Nominees for Trustee and the
Officers of the Trust beneficially owned as a group 82,180 shares of the U.S.
Small Capitalization Series, comprising less than 1% of the outstanding shares
of such Fund, 126,414 shares of the International Small Capitalization Series,
comprising 2.5% of the outstanding shares of such Fund, 161,534 shares of the
Japan Series, comprising 84% of the outstanding shares of such Fund, 153,267
shares of the Barr Rosenberg Market Neutral Fund,
 
                                       13
<PAGE>
comprising less than 1% of the outstanding shares of such Fund, 160,903 shares
of the Barr Rosenberg Double Alpha Market Fund, comprising 20.2% of the
outstanding shares of such Fund and 100,000 shares of the Barr Rosenberg Select
Sectors Market Neutral Fund, comprising 95% of the outstanding shares of such
Fund.
 
    The Board of Trustees met four times during the fiscal year ended March 31,
1998. Each Trustee attended at least 75% of such meetings, except for Ms. Fritz,
who attended one of the four meetings. The Trust has a standing audit committee
composed of Messrs. Hakansson and Sharpe which is responsible for the selection
of the Trust's auditors and monitoring the audit process and its results.
Messrs. Hakansson and Sharpe attended both audit committee meetings held during
the fiscal year ended March 31, 1998. The Trust does not have nominating or
compensation committees, although Mr. Jaffee was selected and proposed to the
full Board of Trustees for election as Trustee by Messrs. Hakansson and Sharpe.
 
    The Trust pays the Trustees other than those who are interested persons of
Old RIEM an annual fee of $45,540 plus $4,950 for each meeting attended. The
Trust does not pay any pension or retirement benefits for its Trustees. The
Trust does not pay any compensation to officers or trustees of the Trust other
than those Trustees who are not interested persons of the Trust.
 
    The following table sets forth the amount of the compensation paid (or
deferred in lieu of current payment) by the Trust during its fiscal year ended
March 31, 1998 to the persons who served as Trustees during all or any portion
of such fiscal year:
 
                               COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                   (2)                 (3)                     (4)                (5)
                                                AGGREGATE     PENSION OR RETIREMENT     ESTIMATED ANNUAL         TOTAL
                    (1)                       COMPENSATION     BENEFITS ACCRUED AS        BENEFITS UPON      COMPENSATION
NAME OF PERSON, POSITION                       FROM TRUST    PART OF TRUST EXPENSES        RETIREMENT         FROM TRUST
- --------------------------------------------  -------------  -----------------------  ---------------------  -------------
<S>                                           <C>            <C>                      <C>                    <C>
Nils H. Hakansson ..........................   $ 42,487.50          $       0               $       0         $ 42,487.50
 Trustee
William F. Sharpe ..........................   $ 42,487.50          $       0               $       0         $ 42,487.50
 Trustee
</TABLE>
 
    REQUIRED VOTE.  The election of Trustees of the Trust will be by a plurality
of the shares of the Trust (all six Funds of the Trust voting together as a
single class) present at the Meeting in person or by Proxy. Shares represented
by duly-executed Proxies will be voted for the election of the persons named
herein as Nominees, unless such authority has been withheld in accordance with
the instructions on the form of Proxy. If no instructions are made, the Proxy
will be voted for such Nominees.
 
    THE TRUSTEES UNANIMOUSLY RECOMMEND A VOTE FOR THE ELECTION OF THE NOMINEES.
 
                                       14
<PAGE>
                             III. OTHER INFORMATION
 
    INFORMATION REGARDING THE TRUST'S ADMINISTRATOR.  The Trust's Administrator
is BISYS Fund Services Ohio, Inc., located at 3435 Stelzer Road, Columbus, OH
43219.
 
    INFORMATION REGARDING THE TRUST'S DISTRIBUTOR.  The Trust's Distributor (for
each class of shares of each Fund other than Institutional Shares) is Barr
Rosenberg Funds Distributor, Inc., located at 90 Park Avenue, New York, NY
10016.
 
    OTHER BUSINESS.  As of the date of this Proxy Statement, the Trustees know
of no business to come before the Meeting other than as set forth in the Notice
of the Special Meeting of Shareholders. However, if any other matters properly
come before the Meeting, it is their intention that Proxies that do not contain
specific restrictions to the contrary will be voted on such matters in
accordance with the judgment of the persons named in the enclosed form of Proxy.
 
    ADJOURNMENT.  In the event that sufficient votes in favor of any of the
proposals set forth in the Notice of the Special Meeting of Shareholders are not
received by the time scheduled for the Meeting, the persons named as Proxies may
propose one or more adjournments of the Meeting after the date set for the
original Meeting to permit further solicitation of Proxies with respect to any
such proposals. In addition, if, in the judgment of the persons named as
Proxies, it is advisable to defer action on one or more proposals, the persons
named as Proxies may propose one or more adjournments of the Meeting for a
reasonable time. Any such adjournments will require the affirmative vote of a
majority of the votes cast on the question in person or by Proxy at the session
of the Meeting to be adjourned, as required by the Trust's Agreement and
Declaration of Trust and By-Laws. The persons named as Proxies will vote in
favor of such adjournment those Proxies which they are entitled to vote in favor
of such proposals. They will vote against any such adjournment those Proxies
required to be voted against any of such proposals. The costs of any additional
solicitation and of any adjourned session will be borne by Old RIEM. Any
proposals for which sufficient favorable votes have been received by the time of
the Meeting will be acted upon and such action will be final regardless of
whether the Meeting is adjourned to permit additional solicitation with respect
to any other proposal.
 
    ANNUAL REPORT.  The Fund's 1997 Annual Report to Shareholders was mailed to
shareholders on or about May 29, 1998. ADDITIONAL COPIES OF THE ANNUAL REPORT
AND THE SEMI-ANNUAL REPORT FOR THE SIX MONTHS ENDED SEPTEMBER 30, 1998, ONCE
AVAILABLE, MAY BE OBTAINED WITHOUT CHARGE FROM THE TRUST BY WRITING TO 3435
STELZER ROAD, COLUMBUS, OHIO 43219, OR BY CALLING TOLL-FREE AT (800) 555-5737
(FOR INSTITUTIONAL SHARE CUSTOMERS) OR 800-447-3332 (FOR INVESTOR SHARE, ADVISER
SHARE, AND SELECT SHARE CUSTOMERS).
 
    DATE OF RECEIPT OF SHAREHOLDERS' PROPOSALS FOR SUBSEQUENT MEETINGS OF
SHAREHOLDERS.  The Trust's Agreement and Declaration of Trust does not provide
for annual meetings of shareholders and the Trust currently does not intend to
hold any annual meetings. Shareholder proposals for inclusion in the Trust's
proxy statement for any special meeting must be received by the Trust a
reasonable period of time before the Trust begins to print and mail its proxy
materials. The timely submission of a proposal does not guarantee its inclusion.
 
    PLEASE EXECUTE AND RETURN THE ENCLOSED PROXY PROMPTLY TO ENSURE THAT A
QUORUM IS PRESENT AT THE SPECIAL MEETING. A SELF-ADDRESSED, POSTAGE-PAID
ENVELOPE IS ENCLOSED FOR YOUR CONVENIENCE.
 
NOVEMBER 6, 1998
 
                                       15
<PAGE>
                                                                       EXHIBIT A
 
                       [FORM OF NEW MANAGEMENT AGREEMENT]
 
                              MANAGEMENT CONTRACT
 
    Management Contract executed as of           , 1999 between Barr Rosenberg
Series Trust, a Massachusetts business trust (the "Trust"), on behalf of its
         (the "Fund"), and AXA Rosenberg Investment Management LLC (the
"Manager").
 
                                  WITNESSETH:
 
    That in consideration of the mutual covenants herein contained, it is agreed
as follows:
 
1. SERVICES TO BE RENDERED BY MANAGER TO THE TRUST.
 
    (a) Subject always to the control of the Trustees of the Trust and to such
policies as the Trustees may determine, the Manager will, at its expense, (i)
furnish continuously an investment program for the Fund and will make investment
decisions on behalf of the Fund and place all orders for the purchase and sale
of its portfolio securities and (ii) furnish office space and equipment, provide
bookkeeping and clerical services (excluding determination of net asset value,
shareholder accounting services and the fund accounting services for the Fund
being supplied by State Street Bank and Trust Company) and pay all salaries,
fees and expenses of officers and Trustees of the Trust who are affiliated with
the Manager. In the performance of its duties, the Manager will comply with the
provisions of the Agreement and Declaration of Trust and By-laws of the Trust
and the Fund's stated investment objective, policies and restrictions.
 
    (b) In placing orders for the portfolio transactions of the Fund, the
Manager will seek the best price and execution available, except to the extent
it may be permitted to pay higher brokerage commissions for brokerage and
research services as described below. In using its best efforts to obtain for
the Fund the most favorable price and execution available, the Manager shall
consider all factors it deems relevant, including, without limitation, the
overall net economic result to the Fund (involving price paid or received and
any commissions and other costs paid), the efficiency with which the transaction
is effected, the ability to effect the transaction at all where a large block is
involved, availability of the broker to stand ready to execute possibly
difficult transactions in the future and financial strength and stability of the
broker. Subject to such policies as the Trustees may determine, the Manager
shall not be deemed to have acted unlawfully or to have breached any duty
created by this Contract or otherwise solely by reason of its having caused the
Fund to pay a broker or dealer that provides brokerage and research services to
the Manager an amount of commission for effecting a portfolio investment
transaction in excess of the amount of commission another broker or dealer would
have charged for effecting that transaction, if the Manager determines in good
faith that such amount of commission was reasonable in relation to the value of
the brokerage and research services provided by such broker or dealer, viewed in
terms of either that particular transaction or the Manager's overall
responsibilities with respect to the Trust and to other clients of the Manager
as to which the Manager exercises investment discretion.
 
    (c) The Manager shall not be obligated under this agreement to pay any
expenses of or for the Trust or of or for the Fund not expressly assumed by the
Manager pursuant to this Section 1 other than as provided in Section 3.
 
2. OTHER AGREEMENTS, ETC.
 
    It is understood that any of the shareholders, Trustees, officers and
employees of the Trust may be a partner, shareholder, director, officer or
employee of, or be otherwise interested in, the Manager, and in any person
controlled by or under common control with the Manager, and that the Manager and
any person controlled by or under common control with the Manager may have an
interest in the Trust. It is also understood that the Manager and persons
controlled by or under common control with the Manager
 
                                       16
<PAGE>
have and may have advisory, management service, distribution or other contracts
with other organizations and persons, and may have other interests and
businesses.
 
3. COMPENSATION TO BE PAID BY THE TRUST TO THE MANAGER.
 
    The Fund will pay to the Manager as compensation for the Manager's services
rendered, for the facilities furnished and for the expenses borne by the Manager
pursuant to Section 1, a fee, computed and paid quarterly at the annual rate of
  % of the Fund's average daily net asset value. Such average daily net asset
value of the Fund shall be determined by taking an average of all of the
determinations of such net asset value during such quarter at the close of
business on each business day during such quarter while this Contract is in
effect. Such fee shall be payable for each quarter within five (5) business days
after the end of such quarter.
 
    In the event that expenses of the Fund (including investment advisory fees
but excluding taxes, portfolio brokerage commissions and any distribution
expenses paid by the Fund pursuant to a distribution plan or otherwise) for any
fiscal year should exceed the expense limitation on investment company expenses
imposed by any statute or regulatory authority of any jurisdiction in which
shares of the Fund are qualified for offer and sale, the compensation due the
Manager for such fiscal year shall be reduced by the amount of such excess by
reduction or refund thereof. In the event that the expenses of the Fund exceed
any expense limitation that the Manager may, by written notice to the Trust,
voluntarily declare to be effective with respect to the Fund, subject to such
terms and conditions as the Manager may prescribe in such notice, the
compensation due the Manager shall be reduced, and, if necessary, the Manager
shall bear the Fund's expenses to the extent required by such expense
limitation.
 
    If the Manager shall serve for less than the whole of a month, the foregoing
compensation shall be prorated.
 
4. ASSIGNMENT TERMINATES THIS CONTRACT; AMENDMENTS OF THIS CONTRACT.
 
    This Contract shall automatically terminate, without the payment of any
penalty, in the event of its assignment; and this Contract shall not be amended
unless such amendment is approved in such manner as may be required by the
Investment Company Act of 1940, as amended.
 
5. EFFECTIVE PERIOD AND TERMINATION OF THIS CONTRACT.
 
    This Contract shall become effective upon its execution, and shall remain in
full force and effect continuously thereafter (unless terminated automatically
as set forth in Section 4) until terminated as follows:
 
        (a) Either party hereto may at any time terminate this Contract by not
    more than sixty days' written notice delivered or mailed by registered mail,
    postage prepaid, to the other party, or
 
        (b) If (i) the Trustees of the Trust by majority vote or the
    shareholders by the affirmative vote of a majority of the outstanding shares
    of the Fund, and (ii) a majority of the Trustees of the Trust who are not
    interested persons of the Trust or of the Manager, by vote cast in person at
    a meeting called for the purpose of voting on such approval, do not
    specifically approve at least annually the continuance of this Contract,
    then this Contract shall automatically terminate at the close of business on
    the first anniversary of its execution, or upon the expiration of one year
    from the effective date of the last such continuance, whichever is later;
    provided, however, that if the continuance of this Contract is submitted to
    the shareholders of the Fund for their approval and such shareholders fail
    to approve such continuance of this Contract as provided herein, the Manager
    may continue to serve hereunder in a manner consistent with the Investment
    Company Act of 1940 and the rules and regulations thereunder.
 
                                       17
<PAGE>
    Action by the Trust under (a) above may be taken either (i) by vote of a
majority of its Trustees, or (ii) by the affirmative vote of a majority of the
outstanding shares of the Fund.
 
    Termination of this Contract pursuant to this Section 5 shall be without the
payment of any penalty.
 
6. CERTAIN DEFINITIONS.
 
    For the purposes of this Contract, the "affirmative vote of a majority of
the outstanding shares" of the Fund means the affirmative vote, at a duly called
and held meeting of shareholders, (a) of the holders of 67% or more of the
shares of the Fund present (in person or by proxy) and entitled to vote at such
meeting, if the holders of more than 50% of the outstanding shares of the Fund
entitled to vote at such meeting are present in person or by proxy, or (b) of
the holders of more than 50% of the outstanding shares of the Fund entitled to
vote at such meeting, whichever is less.
 
    For the purposes of this Contract, the terms "affiliated person", "control",
"interested person" and "assignment" shall have their respective meanings
defined in the Investment Company Act of 1940 and the rules and regulations
thereunder, subject, however, to such exemptions as may be granted by the
Securities and Exchange Commission under said Act; and the phrase "specifically
approve at least annually" shall be construed in a manner consistent with the
Investment Company Act of 1940 and the rules and regulations thereunder.
 
7. NONLIABILITY OF MANAGER.
 
    In the absence of willful misfeasance, bad faith or gross negligence on the
part of the Manager, or reckless disregard of its obligations and duties
hereunder, the Manager shall not be subject to any liability to the Trust, or to
any shareholder of the Trust, for any act or omission in the course of, or
connected with, rendering services hereunder.
 
8. THE NAMES "ROSENBERG" OR "BARR ROSENBERG".
 
    The Manager owns the right to use the names "Rosenberg" or "Barr Rosenberg"
in connection with investment-related services or products, and such names may
be used by the Trust only with the consent of the Manager. The Manager consents
to the use by the Trust of the name "Barr Rosenberg Series Trust" or any other
name embodying the names "Rosenberg" or "Barr Rosenberg", in such forms as the
Manager shall in writing approve, but only on condition and so long as (i) this
Contract shall remain in full force and (ii) the Trust shall fully perform,
fulfill and comply with all provisions of this Contract expressed herein to be
performed, fulfilled or complied with by it. No such name shall be used by the
Trust at any time or in any place or for any purposes or under any conditions
except as in this section provided. The foregoing authorization by the Manager
to the Trust to use the names "Rosenberg" or "Barr Rosenberg" as part of a
business or name is not exclusive of the right of the Manager itself to use, or
to authorize others to use, said name; the Trust acknowledges and agrees that as
between the Manager and the Trust, the Manager has the exclusive right so to
use, or to authorize others to use, said names; and the Trust agrees, on behalf
of the Fund, to take such action as may reasonably be requested by the Manager
to give full effect to the provisions of this section (including, without
limitation, consenting to such use of said names). Without limiting the
generality of the foregoing, the Trust agrees that, upon any termination of this
Contract by either party or upon the violation of any of its provisions by the
Trust, the Trust will, at the request of the Manager made within six months
after the Manager has knowledge of such termination or violation, use its best
efforts to change the name of the Trust so as to eliminate all reference, if
any, to the names "Rosenberg" or "Barr Rosenberg" and will not thereafter
transact any business in a name containing the names "Rosenberg" or "Barr
Rosenberg" in any form or combination whatsoever, or designate itself as the
same entity as or successor to an entity of such name, or otherwise use the
names "Rosenberg" or "Barr Rosenberg" or any other reference to the Manager.
Such covenants on the part of the Trust shall be
 
                                       18
<PAGE>
binding upon it, its trustees, officers, stockholders, creditors and all other
persons claiming under or through it.
 
9. LIMITATION OF LIABILITY OF THE TRUSTEES AND SHAREHOLDERS.
 
    A copy of the Agreement and Declaration of Trust of the Trust, as amended,
is on file with the Secretary of The Commonwealth of Massachusetts, and notice
is hereby given that this instrument is executed on behalf of the Trustees of
the Trust as Trustees and not individually and that the obligations of this
instrument are not binding upon any of the Trustees or shareholders individually
but are binding only upon the assets and property of the Fund.
 
    IN WITNESS WHEREOF, Barr Rosenberg Series Trust, on behalf of its          ,
and AXA Rosenberg Investment Management have each caused this instrument to be
signed in duplicate on its behalf by its duly authorized representative, all as
of the day and year first above written.
 
                                          BARR ROSENBERG SERIES TRUST, on behalf
                                          of its
 
                                          By ___________________________________
 
                                          Title:
 
                                          AXA ROSENBERG INVESTMENT MANAGEMENT
                                          LLC
 
                                          By ___________________________________
 
                                          Title:
 
                                       19
<PAGE>

                            BARR ROSENBERG SERIES TRUST
                                          
                          U.S. SMALL CAPITALIZATION SERIES
                                          
        THIS SOLICITATION IS BEING MADE ON BEHALF OF THE BOARD OF TRUSTEES.

     The undersigned shareholder, by completing this form, does thereby 
appoint Marlis S. Fritz and Sara Ronan, and each of them separately, with 
power of substitution, attorneys and proxies of the undersigned, and does 
thereby request that all shares of the U.S. Small Capitalization Series of 
Barr Rosenberg Series Trust which the undersigned is entitled to vote be cast 
as directed at the Special Meeting of Shareholders of Barr Rosenberg Series 
Trust, to be held at 10:00 a.m., Pacific Time, on December 28, 1998 at the 
offices of Rosenberg Institutional Equity Management, Four Orinda Way, 
Building E, Orinda, California 94563, and at any adjournment thereof.

PLEASE VOTE, DATE, SIGN EXACTLY AS YOUR NAME APPEARS ON THIS PROXY CARD, AND
RETURN THIS FORM IN THE ENCLOSED SELF-ADDRESSED ENVELOPE.

NOTE:  The undersigned hereby acknowledges receipt of the Notice of Meeting and
Proxy Statement, and revokes any proxy heretofore given with respect to the
votes covered by this proxy.       

HAS YOUR ADDRESS CHANGED:               DO YOU HAVE ANY COMMENTS?

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

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

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

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

[X] PLEASE MARK VOTES
    AS IN THIS EXAMPLE   

- --------------------------------------------------------------------------------
                             BARR ROSENBERG SERIES TRUST
- --------------------------------------------------------------------------------
                           U.S. SMALL CAPITALIZATION SERIES


MARK BOX AT RIGHT IF AN ADDRESS CHANGE OR      [     ]
COMMENT HAS BEEN NOTED ON THE REVERSE SIDE 
OF THIS CARD.






Please be sure to sign and date this Proxy.  Date:

Shareholder sign here     Co-owner sign here

The shares represented by this proxy will be voted as directed below, or if no
direction is indicated, will be voted FOR the election of the nominees for
Trustee listed below.


1.  Proposal to approve the U.S. Small    For       With-    Abstain
    Capitalization Series' New                      hold    
    Management Agreement                  [  ]      [  ]      [  ]


2.  Proposal to approve the               For       With-     For All
    election of the nominees for                    hold      Except
    Trustee:                             


Nils H. Hakansson                         [  ]      [  ]       [  ]
Dwight M. Jaffee                          [  ]      [  ]       [  ]

(Instructions:  To withhold authority to vote for any individual nominee, mark
the "For All Except" box and strike a line through the nominee's name in the
list above.)

<PAGE>

                            BARR ROSENBERG SERIES TRUST
                                          
                     INTERNATIONAL SMALL CAPITALIZATION SERIES
                                          
        THIS SOLICITATION IS BEING MADE ON BEHALF OF THE BOARD OF TRUSTEES.

     The undersigned shareholder, by completing this form, does thereby 
appoint Marlis S. Fritz and Sara Ronan, and each of them separately, with 
power of substitution, attorneys and proxies of the undersigned, and does 
thereby request that all shares of the International Small Capitalization 
Series of Barr Rosenberg Series Trust which the undersigned is entitled to 
vote be cast as directed at the Special Meeting of Shareholders of Barr 
Rosenberg Series Trust, to be held at 10:00 a.m., Pacific Time, on December 
28, 1998 at the offices of Rosenberg Institutional Equity Management, Four 
Orinda Way, Building E, Orinda, California 94563, and at any adjournment 
thereof.

PLEASE VOTE, DATE, SIGN EXACTLY AS YOUR NAME APPEARS ON THIS PROXY CARD, AND
RETURN THIS FORM IN THE ENCLOSED SELF-ADDRESSED ENVELOPE.

NOTE:  The undersigned hereby acknowledges receipt of the Notice of Meeting and
Proxy Statement, and revokes any proxy heretofore given with respect to the
votes covered by this proxy.       

HAS YOUR ADDRESS CHANGED:               DO YOU HAVE ANY COMMENTS?

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

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

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

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

[X] PLEASE MARK VOTES
    AS IN THIS EXAMPLE   

- --------------------------------------------------------------------------------
                             BARR ROSENBERG SERIES TRUST
- --------------------------------------------------------------------------------
                      INTERNATIONAL SMALL CAPITALIZATION SERIES


MARK BOX AT RIGHT IF AN ADDRESS CHANGE OR      [     ]
COMMENT HAS BEEN NOTED ON THE REVERSE SIDE 
OF THIS CARD.






Please be sure to sign and date this Proxy.  Date:

Shareholder sign here     Co-owner sign here

The shares represented by this proxy will be voted as directed below, or if no
direction is indicated, will be voted FOR the election of the nominees for
Trustee listed below.


1.  Proposal to approve the               For       With-     Abstain
    International Small Capitalization              hold
    Series' New Management Agreement      [  ]      [  ]       [  ]


2.  Proposal to approve the               For       With-     For All
    election of the nominees for                    hold      Except
    Trustee:                    


Nils H. Hakansson                         [  ]      [  ]       [  ]
Dwight M. Jaffee                          [  ]      [  ]       [  ]

(Instructions:  To withhold authority to vote for any individual nominee, mark
the "For All Except" box and strike a line through the nominee's name in the
list above.)

<PAGE>

                            BARR ROSENBERG SERIES TRUST
                                          
                                    JAPAN SERIES
                                          
        THIS SOLICITATION IS BEING MADE ON BEHALF OF THE BOARD OF TRUSTEES.

     The undersigned shareholder, by completing this form, does thereby 
appoint Marlis S. Fritz and Sara Ronan, and each of them separately, with 
power of substitution, attorneys and proxies of the undersigned, and does 
thereby request that all shares of the Japan Series of Barr Rosenberg Series 
Trust which the undersigned is entitled to vote be cast as directed at the 
Special Meeting of Shareholders of Barr Rosenberg Series Trust, to be held at 
10:00 a.m., Pacific Time, on December 28, 1998 at the offices of Rosenberg 
Institutional Equity Management, Four Orinda Way, Building E, Orinda, 
California 94563, and at any adjournment thereof.

PLEASE VOTE, DATE, SIGN EXACTLY AS YOUR NAME APPEARS ON THIS PROXY CARD, AND
RETURN THIS FORM IN THE ENCLOSED SELF-ADDRESSED ENVELOPE.

NOTE:  The undersigned hereby acknowledges receipt of the Notice of Meeting and
Proxy Statement, and revokes any proxy heretofore given with respect to the
votes covered by this proxy.       

HAS YOUR ADDRESS CHANGED:               DO YOU HAVE ANY COMMENTS?

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

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

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

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

[X] PLEASE MARK VOTES
    AS IN THIS EXAMPLE   

- --------------------------------------------------------------------------------
                             BARR ROSENBERG SERIES TRUST
- --------------------------------------------------------------------------------
                                     JAPAN SERIES


MARK BOX AT RIGHT IF AN ADDRESS CHANGE OR      [     ]
COMMENT HAS BEEN NOTED ON THE REVERSE SIDE 
OF THIS CARD.






Please be sure to sign and date this Proxy.  Date:

Shareholder sign here     Co-owner sign here

The shares represented by this proxy will be voted as directed below, or if no
direction is indicated, will be voted FOR the election of the nominees for
Trustee listed below.


1.  Proposal to approve the Japan         For      With-     Abstain
    Series' New Management Agreement               hold
                                          [  ]     [  ]      [  ]


2.  Proposal to approve the               For      With-     For All
    election of the nominees for                   hold      Except
    Trustee:                             


Nils H. Hakansson                         [  ]      [  ]       [  ]
Dwight M. Jaffee                          [  ]      [  ]       [  ]

(Instructions:  To withhold authority to vote for any individual nominee, mark
the "For All Except" box and strike a line through the nominee's name in the
list above.)

<PAGE>

                            BARR ROSENBERG SERIES TRUST
                                          
                         BARR ROSENBERG MARKET NEUTRAL FUND
                                          
        THIS SOLICITATION IS BEING MADE ON BEHALF OF THE BOARD OF TRUSTEES.

     The undersigned shareholder, by completing this form, does thereby 
appoint Marlis S. Fritz and Sara Ronan, and each of them separately, with 
power of substitution, attorneys and proxies of the undersigned, and does 
thereby request that all shares of the Barr Rosenberg Market Neutral Fund of 
Barr Rosenberg Series Trust which the undersigned is entitled to vote be cast 
as directed at the Special Meeting of Shareholders of Barr Rosenberg Series 
Trust, to be held at 10:00 a.m., Pacific Time, on December 28, 1998 at the 
offices of Rosenberg Institutional Equity Management, Four Orinda Way, 
Building E, Orinda, California 94563, and at any adjournment thereof.

PLEASE VOTE, DATE, SIGN EXACTLY AS YOUR NAME APPEARS ON THIS PROXY CARD, AND
RETURN THIS FORM IN THE ENCLOSED SELF-ADDRESSED ENVELOPE.

NOTE:  The undersigned hereby acknowledges receipt of the Notice of Meeting and
Proxy Statement, and revokes any proxy heretofore given with respect to the
votes covered by this proxy.       

HAS YOUR ADDRESS CHANGED:               DO YOU HAVE ANY COMMENTS?

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

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

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

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

[X] PLEASE MARK VOTES
    AS IN THIS EXAMPLE   

- --------------------------------------------------------------------------------
                             BARR ROSENBERG SERIES TRUST
- --------------------------------------------------------------------------------
                          BARR ROSENBERG MARKET NEUTRAL FUND


MARK BOX AT RIGHT IF AN ADDRESS CHANGE OR      [     ]
COMMENT HAS BEEN NOTED ON THE REVERSE SIDE 
OF THIS CARD.





Please be sure to sign and date this Proxy.  Date:

Shareholder sign here     Co-owner sign here

The shares represented by this proxy will be voted as directed below, or if no
direction is indicated, will be voted FOR the election of the nominees for
Trustee listed below.


1.  Proposal to approve the Barr          For       With-      Abstain
    Rosenberg Market Neutral Fund's       hold      hold
    New Management Agreement              [  ]      [  ]       [  ]


2.  Proposal to approve the               For      With-     For All
    election of the nominees for                   hold      Except
    Trustee:                             


Nils H. Hakansson                         [  ]      [  ]       [  ]
Dwight M. Jaffee                          [  ]      [  ]       [  ]

(Instructions:  To withhold authority to vote for any individual nominee, mark
the "For All Except" box and strike a line through the nominee's name in the
list above.)

<PAGE>
                                          
                            BARR ROSENBERG SERIES TRUST
                                          
                      BARR ROSENBERG DOUBLE ALPHA MARKET FUND
                                          
        THIS SOLICITATION IS BEING MADE ON BEHALF OF THE BOARD OF TRUSTEES.

     The undersigned shareholder, by completing this form, does thereby 
appoint Marlis S. Fritz and Sara Ronan, and each of them separately, with 
power of substitution, attorneys and proxies of the undersigned, and does 
thereby request that all shares of the Barr Rosenberg Double Alpha Market 
Fund of Barr Rosenberg Series Trust which the undersigned is entitled to vote 
be cast as directed at the Special Meeting of Shareholders of Barr Rosenberg 
Series Trust, to be held at 10:00 a.m., Pacific Time, on December 28, 1998 at 
the offices of Rosenberg Institutional Equity Management, Four Orinda Way, 
Building E, Orinda, California 94563, and at any adjournment thereof.

PLEASE VOTE, DATE, SIGN EXACTLY AS YOUR NAME APPEARS ON THIS PROXY CARD, AND
RETURN THIS FORM IN THE ENCLOSED SELF-ADDRESSED ENVELOPE.

NOTE:  The undersigned hereby acknowledges receipt of the Notice of Meeting and
Proxy Statement, and revokes any proxy heretofore given with respect to the
votes covered by this proxy.       


HAS YOUR ADDRESS CHANGED:               DO YOU HAVE ANY COMMENTS?

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

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

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

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

[X] PLEASE MARK VOTES
    AS IN THIS EXAMPLE   

- --------------------------------------------------------------------------------
                             BARR ROSENBERG SERIES TRUST
- --------------------------------------------------------------------------------
                       BARR ROSENBERG DOUBLE ALPHA MARKET FUND


MARK BOX AT RIGHT IF AN ADDRESS CHANGE OR      [     ]
COMMENT HAS BEEN NOTED ON THE REVERSE SIDE 
OF THIS CARD.





Please be sure to sign and date this Proxy.  Date:

Shareholder sign here     Co-owner sign here

The shares represented by this proxy will be voted as directed below, or if no
direction is indicated, will be voted FOR the election of the nominees for
Trustee listed below.


1.  Proposal to approve the Barr          For       With-      Abstain
    Rosenberg Double Alpha Market                   hold
    Fund's New Management Agreement       [  ]      [  ]       [  ]


2.  Proposal to approve the               For       With-     For All
    election of the nominees for                    hold      Except
    Trustee:                            


Nils H. Hakansson                         [  ]      [  ]       [  ]
Dwight M. Jaffee                          [  ]      [  ]       [  ]

(Instructions:  To withhold authority to vote for any individual nominee, mark
the "For All Except" box and strike a line through the nominee's name in the
list above.)

<PAGE>

                            BARR ROSENBERG SERIES TRUST
                                          
                  BARR ROSENBERG SELECT SECTORS MARKET NEUTRAL FUND
                                          
        THIS SOLICITATION IS BEING MADE ON BEHALF OF THE BOARD OF TRUSTEES.

     The undersigned shareholder, by completing this form, does thereby 
appoint Marlis S. Fritz and Sara Ronan, and each of them separately, with 
power of substitution, attorneys and proxies of the undersigned, and does 
thereby request that all shares of the Barr Rosenberg Select Sectors Market 
Neutral Fund of Barr Rosenberg Series Trust which the undersigned is entitled 
to vote be cast as directed at the Special Meeting of Shareholders of Barr 
Rosenberg Series Trust, to be held at 10:00 a.m., Pacific Time, on December 
28, 1998 at the offices of Rosenberg Institutional Equity Management, Four 
Orinda Way, Building E, Orinda, California 94563, and at any adjournment 
thereof.

PLEASE VOTE, DATE, SIGN EXACTLY AS YOUR NAME APPEARS ON THIS PROXY CARD, AND
RETURN THIS FORM IN THE ENCLOSED SELF-ADDRESSED ENVELOPE.

NOTE:  The undersigned hereby acknowledges receipt of the Notice of Meeting and
Proxy Statement, and revokes any proxy heretofore given with respect to the
votes covered by this proxy.       


HAS YOUR ADDRESS CHANGED:               DO YOU HAVE ANY COMMENTS?

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

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

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

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

[X] PLEASE MARK VOTES
    AS IN THIS EXAMPLE   

- --------------------------------------------------------------------------------
                           BARR ROSENBERG SERIES TRUST
- --------------------------------------------------------------------------------
               BARR ROSENBERG SELECT SECTORS MARKET NEUTRAL FUND


MARK BOX AT RIGHT IF AN ADDRESS CHANGE OR      [     ]
COMMENT HAS BEEN NOTED ON THE REVERSE SIDE 
OF THIS CARD.





Please be sure to sign and date this Proxy.  Date:

Shareholder sign here     Co-owner sign here

The shares represented by this proxy will be voted as directed below, or if no
direction is indicated, will be voted FOR the election of the nominees for
Trustee listed below.


1.  Proposal to approve the Barr          For       With-      Abstain
    Rosenberg Select Sectors Market                 hold
    Neutral Fund's New Management   
    Agreement                             [  ]      [  ]       [  ]


2.  Proposal to approve the               For       With-     For All
    election of the nominees for                    hold      Except
    Trustee:


Nils H. Hakansson                         [  ]      [  ]       [  ]
Dwight M. Jaffee                          [  ]      [  ]       [  ]

(Instructions:  To withhold authority to vote for any individual nominee, mark
the "For All Except" box and strike a line through the nominee's name in the
list above.)




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