SCHEDULE 14A INFORMATION

          Proxy Statement Pursuant to Section 14(a) of the Securities
                    Exchange Act of 1934 (Amendment No.  )

Filed by the Registrant [X]

Filed by a Party other than the Registrant [_]

Check the appropriate box:

[_]  Preliminary Proxy Statement         [_]  CONFIDENTIAL, FOR USE OF THE
                                              COMMISSION ONLY (AS PERMITTED BY
                                              RULE 14A-6(E)(2))

[X]  Definitive Proxy Statement

[_]  Definitive Additional Materials

[_]  Soliciting Material Pursuant to Section 240.14a-11(c) or Section 240.14a-12

                          Allmerica Securities 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)(4) and 0-11.


     (1) Title of each class of securities to which transaction applies:


     (2) Aggregate number of securities to which transaction applies:


     (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):


     (4) Proposed maximum aggregate value of transaction:


     (5) Total fee paid:


[_]  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:





                          Allmerica Securities Trust

              440 LINCOLN STREET, WORCESTER, MASSACHUSETTS 01653

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

                 NOTICE OF THE ANNUAL MEETING OF SHAREHOLDERS
                           TO BE HELD APRIL 19, 2000

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

To the Shareholders:

  The Annual Meeting of the Shareholders (the "Meeting") of Allmerica
Securities Trust (the "Trust") will be held at the offices of the Trust, 440
Lincoln Street, Worcester, Massachusetts 01653, Wednesday, April 19, 2000, at
9:00 a.m., local time, for the following purposes:

  1. To elect Trustees, each to serve until the next Annual Meeting of
     Shareholders and until his or her successor is duly elected and
     qualified;

  2. To ratify or reject the selection by the Trustees of the firm of
     PricewaterhouseCoopers LLP as independent accountants of the Trust for
     the fiscal year ending December 31, 2000; and

  3. To transact such other business as may properly come before the Meeting,
     or any adjournment thereof.

  Only shareholders of record at the close of business on March 1, 2000 will
be entitled to notice of and to vote at the Meeting and any adjournment
thereof.

                                          By order of the Trustees,

                                          GEORGE M. BOYD
                                          Secretary

March 16, 2000


                          ALLMERICA SECURITIES TRUST
              440 LINCOLN STREET, WORCESTER, MASSACHUSETTS 01653

                                PROXY STATEMENT

                                                                 March 16, 2000

                              GENERAL INFORMATION

  The enclosed proxy is solicited by and on behalf of the Trustees of
Allmerica Securities Trust (the "Trust") to be voted at the Annual Meeting of
Shareholders (the "Meeting") of the Trust to be held at the offices of the
Trust, 440 Lincoln Street, Worcester, MA 01653 on Wednesday, April 19, 2000 at
9:00 a.m., local time, for the purposes set forth in the accompanying Notice.
Any Shareholder giving a proxy has the power to revoke it prior to its
exercise by submission of a later dated proxy, by voting in person, or by
letter to the Secretary of the Trust. This solicitation is being made by use
of the mails, but may also be made by telephone, telefax and personal
interviews. The cost of preparing and mailing this Proxy Statement, Notice and
Form of Proxy and any additional material which may hereafter be furnished in
connection with the solicitation of the enclosed proxy will be paid by the
Trust. The approximate date for mailing the Proxy Statement and Form of Proxy
to all Shareholders is March 16, 2000.

  On March 1, 2000, the Trust had outstanding 8,592,306 shares. Each share is
entitled to one vote and each fractional share to an equivalent fractional
vote. Only Shareholders of record at the close of business on March 1, 2000
will be entitled to notice of and to vote at the Meeting.

  In the event that a quorum of Shareholders (30% of all shares issued and
outstanding and entitled to vote at the Meeting) is not represented at the
Meeting or at any adjournments thereof, or, even though a quorum is so
represented, if sufficient votes in favor of the matters set forth in the
Notice of Meeting are not received by April 19, 2000, the persons named as
proxies may propose one or more adjournments of the Meeting for a period or
periods of not more than 90 days in the aggregate and further solicitation of
proxies may be made. Any such adjournment may be effected by a majority of the
votes properly cast in person or by proxy on the question at the session of
the Meeting to be adjourned. The persons named as proxies will vote in favor
of such adjournment those proxies which they are entitled to vote in favor of
the matters set forth in the Notice of the Meeting. They will vote against any
such adjournment those proxies required to be voted against any such matters.

  The Trust's Annual Report for the fiscal year ended December 31, 1999,
including financial statements, may be obtained, without charge, by calling
Shareholder Services, The Bank of New York, 101 Barclay Street, New York, NY
10286, 1-800-432-8224.

  The Trust's investment adviser is Allmerica Asset Management, Inc. ("AAM"),
a wholly-owned subsidiary of Allmerica Financial Corporation ("AFC"), a
Delaware holding company for a group of affiliated companies, the largest of
which is First Allmerica Financial Life Insurance Company ("First Allmerica").
The address of AAM, AFC and First Allmerica is 440 Lincoln Street, Worcester,
MA 01653. Investors Bank & Trust Company ("IBT") calculates net asset value
per share, maintains general accounting records and performs certain
administrative services for the Trust. Its address is 200 Clarendon Street,
Boston, MA 02116.

                                       1


1. ELECTION OF TRUSTEES

  The Board of Trustees ("Board") currently consists of 10 members each of
whom is a nominee for re-election. The number of members of the Board has been
fixed by the Board at 10. The Agreement and Declaration of Trust provides that
the Trust shall have a Board composed of not less than 3 nor more than 15
Trustees to be elected by ballot by the Shareholders.

  Biographical data for the current Trustees of the Trust who have been
nominated for re-election is set forth below. Information relating to the
principal officers of the Trust is set forth under "Information Pertaining to
Allmerica Financial Corporation." It is proposed at the Meeting to re-elect
the persons listed below as Trustees, each to serve as such until the next
Annual Meeting of Shareholders and until his or her successor is elected and
qualified. All are now Trustees and all have stated they would be willing to
serve if re-elected. There are no arrangements between any Trustee and any
other person pursuant to which he or she was or is to be selected as a
Trustee.



                                                                                   Beneficial
 Name and Age of Nominee                                                          Ownership of
            as                        Principal Occupation and             Served  Shares as
        of 3/1/00                         Directorships(1)                 Since  of 3/1/00(2)
 -----------------------              ------------------------             ------ ------------
                                                                         
 P. Kevin Condron (54)     President and Chief Executive Officer, The       1998       100
  Trustee, Member of the   Granite Group (plumbing supplies), 1998-
  Audit Committee and      present; President, Central Supply Co., 1983-
  Fund Operations          1997; Director, Peoples Heritage Financial
  Committee                Group; Director, Family Bank


 Cynthia A. Hargadon (45)  Director of Investments, National Automobile     1997     1,000
  Trustee, Member of the   Dealers Association (retirement trust), 1999-
  Fund Operations          present; President, Stable Value Investment
  Committee and            Association (investment trade group), 1996-
  Investment Operations    1998; Senior Vice President and Chief
  Committee                Investment Officer, ICMA Retirement
                           Corporation (investment adviser), 1987-1996.

 Gordon Holmes (61)        Lecturer at Bentley College, 1998-present;       1991       100
  Trustee, Chairman of     Lecturer and Executive in Residence, Boston
  the Audit Committee and  University, 1997-present; Certified Public
  Member of the Fund       Accountant; Retired Partner, Tofias, Fleishman,
  Operations Committee     Shapiro & Co., P.C. (Accountants), 1976-1996.

 *John P. Kavanaugh (45)   President, AAM since 1995; Vice President,       1995       100
  Trustee and Vice         Director, and Chief Investment Officer, First
  President, Chairman of   Allmerica and Allmerica Financial Life
  the Investment           Insurance and Annuity Company ("Allmerica
  Operations Committee     Financial Life")

 Bruce E. Langton (68)     Trustee, Bankers Trust institutional mutual      1996       106
  Trustee, Member of the   funds; Director, TWA Pilots Trust Annuity Plan;
  Audit Committee,         Member, Investment Committee, Unilever
  Investment Operations    United States--Pension & Thrift plans.
  Committee and
  Nominating Committee


                                       2




                                                                                          Beneficial
                                                                                         Ownership of
Name and Age of Nominee as                Principal Occupation and                Served  Shares as
        of 3/1/00                             Directorships(1)                    Since  of 3/1/00(2)
- --------------------------                ------------------------                ------ ------------
                                                                                
*John F. O'Brien (56)       President, Chief Executive Officer and Director,       1989      2,000
 Trustee, Chairman of       First Allmerica; Director and Chairman of the
 the Board                  Board, Allmerica Financial Life; Director,
                            Allmerica Investments, Inc.; Director,
                            ABIOMED, Inc. (medical devices); Director,
                            Cabot Corporation (specialty chemicals);
                            Director, TJX Companies, Inc. (retail).

Attiat F. Ott (64)          Professor of Economics and Director of the             1982        500
 Trustee, Chairman of       Institute for Economic Studies, Clark University.
 the Fund Operations
 Committee and Member
 of the Audit Committee

Paul D. Paganucci (68)      Director and Chairman, Ledyard National Bank,          1972     14,009
 Trustee, Member of the     since 1991; Director, Filene's Basement, Inc.
 Audit Committee,           (retailing); Director, Urstadt Biddle Properties,
 Investment Operations      Inc. (real estate investment firm); Director, IGI,
 Committee and the          Inc. (pharmaceuticals).
 Nominating Committee

*Richard M. Reilly (61)     President, Allmerica Financial Life since 1995;        1991      1,000
 Trustee and President,     Vice President, First Allmerica; President,
 Member of the              Allmerica Financial Investment Management
 Investment Operations      Services, Inc.; Director, Allmerica Investments, Inc.
 Committee

Ranne P. Warner (55)        President, Centros Properties, USA; Owner,             1991        100
 Trustee, Chairman of       Ranne P. Warner and Company; Director,
 the Nominating             Wainwright Bank & Trust Co. (commercial
 Committee, Member of       bank); Trustee, Ericksen Trust (real estate).
 the Fund Operations
 Committee and
 Investment Operations
 Committee

- --------
*  Messrs. Kavanaugh, O'Brien and Reilly are "interested persons", as defined
   in the Investment Company Act of 1940 as amended (the "1940 Act"), of the
   Trust and of AFC because of their affiliations with AFC.
(1) Except as otherwise noted, each individual has held the office indicated
    or other offices in the same organization for the last five years. The
    business address of each person is 440 Lincoln Street, Worcester,
    Massachusetts 01653.
(2) On March 1, 2000, the Trustees and officers beneficially owned a total of
    19,019 shares of the Trust, representing .2% of the then outstanding
    shares. The largest single beneficial holding of a Trustee was 14,009
    shares, representing .16% of the outstanding shares. First Allmerica owned
    90,178 shares on March 1, 2000.

  The Trust's Board, which is currently composed of seven non-interested
Trustees and three interested Trustees, met four times during the fiscal year
ended December 31, 1999. During the fiscal year ended December 31, 1999, Mr.
Paganucci attended fewer than 75% of the aggregate of (i) the total number of
meetings of the Board of Trustees and (ii) the total number of meetings held
by all committees of the Board on which he served due to illness. The Trustees
received the following compensation during that year. No officer of the Trust
received compensation from the Trust for serving in such capacity.

                                       3


                               COMPENSATION TABLE



                                                  Total Compensation from Trust
                                                     and Fund Complex (which
      Name of Person       Aggregate Compensation included two other investment
       and Position              from Trust        companies) Paid to Trustees
      --------------       ---------------------- -----------------------------
                                            
P. Kevin Condron *........         $2,080                    $19,000
 Trustee, Member of the
 Audit Committee

Cynthia A. Hargadon.......          2,080                     21,500
 Trustee, Member of the
 Fund Operations Committee
 and Investment Operations
 Committee

Gordon Holmes.............          2,080                     29,500
 Trustee, Chairman of the
 Audit Committee and
 Member of the Fund
 Operations Committee

Bruce E. Langton..........          2,080                     24,500
 Trustee, Member of the
 Audit Committee,
 Investment Operations
 Committee and Nominating
 Committee

Attiat F. Ott.............          2,080                     22,000
 Trustee, Chairman of the
 Fund Operations Committee
 and Member of the Audit
 Committee

Paul D. Paganucci **......         11,500                     11,500
 Trustee, Member of the
 Audit Committee and the
 Nominating Committee

Ranne P. Warner...........          2,080                     25,500
 Trustee, Chairman of the
 Nominating Committee,
 Member of the Fund
 Operations Committee and
 Investment Operations
 Committee

John P. Kavanaugh.........           None                       None
 Trustee, Chairman of the
 Investment Operations
 Committee

John F. O'Brien...........           None                       None
 Trustee

Richard M. Reilly.........           None                       None
 Trustee, Member of the
 Investment Operations
 Committee

- --------
*  Mr. Condron was elected by the Trustees as a Member of the Fund Operations
   Committee on February 15, 2000.
** Mr. Paganucci was elected by the Trustees as a Member of the Investment
   Operations Committee on February 15, 2000.


                                       4


  The Trust has no retirement or pension plan for its Trustees. The Trust does
not have a compensation committee; such matters are considered by the Trust's
Nominating Committee.

  The Trust's Fund Operations Committee is composed entirely of Trustees who
are not interested persons of the Trust, AFC or its affiliates. Currently, Dr.
Ott (Chairman), Mr. Condron, Ms. Hargadon, Mr. Holmes and Ms. Warner comprise
the Committee. The Committee separately reviews and makes recommendations to
the Trustees on a variety of matters, including the various contractual
arrangements between the Trust and its investment adviser and transfer and
shareholder servicing agent, proposals to continue or modify the terms of such
agreements, and certain matters where there may be a possible conflict of
interest between the interests of the Trust and AFC or its affiliates. During
the fiscal year ended December 31, 1999, the Committee had one meeting
relating to the Trust.

  The Trust's Audit Committee is composed entirely of Trustees who are not
interested persons of the Trust, AFC or its affiliates. Currently, Mr. Holmes
(Chairman), Mr. Condron, Mr. Langton, Dr. Ott and Mr. Paganucci comprise the
Committee. This Committee reviews and evaluates the audit function, including
recommending to the Board the independent accountants to be selected for the
Trust, reviewing all auditing procedures and arrangements and reviewing
qualifications of key personnel performing audit work. During the fiscal year
ended December 31, 1999, the Committee had three meetings.

  The Trust's Investment Operations Committee is composed of four Trustees who
are not interested persons of the Trust, AFC or its affiliates, two Trustees
who are interested persons and two non-Trustee participants. Currently, Mr.
Kavanaugh (Chairman), Ms. Hargadon, Mr. Langton, Mr. Paganucci, Mr. Reilly and
Ms. Warner are the Trustees who serve on the Committee. The non-Trustee
participants are Donald F. Speakman and Mark G. Steinberg. The Committee
monitors investment adviser performance and analyzes Fund data. During the
fiscal year ended December 31, 1999, the Committee had four meetings relating
to the Trust.

  The Trust's Nominating Committee is composed entirely of Trustees who are
not interested persons of the Trust, AFC or its affiliates. Currently Ms.
Warner (Chairman), Mr. Langton and Mr. Paganucci comprise the Committee. The
Committee is charged with the duties of reviewing the composition and
compensation of the Trustees, proposing additional non-interested Trustees for
election to the Board and reviewing major personnel changes of the Trust.
During the fiscal year ended December 31, 1999, the Committee had two
meetings. The Nominating Committee will consider nominees recommended by
Shareholders. Recommendations should be submitted to the Committee in care of
the Secretary of the Trust.

  If any of the nominees for election as Trustees shall by reason of death or
for any other reason become unavailable as a candidate at the Meeting, votes
pursuant to the enclosed proxy will be cast for a substitute candidate in the
discretion of the persons named as proxies therein, or their substitutes,
present and acting at the Meeting, or the Trustees may reduce the size of the
Board.

Section 16(a) Beneficial Ownership Reporting Compliance.

  Section 16(a) of the Securities Exchange Act of 1934 and Section 30(h) of
the 1940 Act require the Trust's Trustees and officers, its investment adviser
and certain affiliated persons of the investment adviser and persons who own
more than ten percent of the Trust's shares to file reports of initial
ownership and changes in ownership with the Securities and Exchange Commission
("SEC") and the New York Stock Exchange. These individuals are required by SEC
regulations to furnish the Trust with copies of all Section 16(a) forms they
file.


                                       5


  To the Trust's knowledge, based solely on review of the copies of such
reports furnished to the Trust and written representations that no other
reports were required, all Section 16(a) filing requirements applicable to its
officers, Trustees, greater than ten percent beneficial owners and other
persons subject to Section 16(a) reporting were complied with during the
fiscal year ended December 31, 1999, except that reports of initial ownership
were filed late for Paul T. Kane, Treasurer of the Trust, and David J.
Mueller, former Treasurer of the Trust.

Recommended Shareholder Action and Required Vote.

  The Trustees recommend that the Shareholders vote for each nominee. A
plurality of the votes properly cast in person or by proxy at the Meeting is
required for the election of the Trustees.

2. RATIFICATION OR REJECTION OF SELECTION OF INDEPENDENT ACCOUNTANTS

  Subject to ratification by a majority in interest of Shareholders
represented at the Meeting, the firm of PricewaterhouseCoopers LLP was
selected as independent accountants for the Trust for the fiscal year ending
December 31, 2000 by a majority of the Trustees who are not "interested
persons" of the Trust. PricewaterhouseCoopers LLP also serves as independent
accountants for Allmerica Investment Trust and other affiliates of AFC, but
has no relationship with any of them other than as independent accountants.
During the fiscal year ended December 31, 1999, the audit services provided to
the Trust by PricewaterhouseCoopers LLP included examination of financial
statements, review of filings with the SEC and preparation of tax returns. No
non-audit services were provided to the Trust except that
PricewaterhouseCoopers LLP served as a consultant in connection with the
change in 1999 in the Trust's fund accounting agent from First Data Investors
Services Group, Inc. to IBT.

  It is intended that proxies not limited to the contrary will be voted in
favor of ratifying the selection of PricewaterhouseCoopers LLP under Section
32(a) of the 1940 Act as independent public accountants to certify every
financial statement of the Trust required by any law or regulation to be
certified by independent public accountants and filed with the SEC in respect
of all or any part of the fiscal year ending December 31, 2000.
PricewaterhouseCoopers LLP has no direct or material indirect interest in the
Trust. Representatives of PricewaterhouseCoopers LLP are not expected to be
present at the Meeting, but have been given the opportunity to make a
statement if they so desire and will be available should any matter arise
requiring their presence.

Recommended Shareholder Action and Required Vote.

  The Trustees recommend that the selection of PricewaterhouseCoopers LLP be
ratified. A majority of the votes cast on the matter at the Meeting, in person
or by proxy, is required for approval of this item.

3. OTHER MATTERS AND DISCRETION OF PERSONS NAMED AS PROXIES

  While the Meeting is called to act upon any business that may properly come
before it, at the date of this Proxy Statement the only business which
management intends to present or knows that others will present is the
business mentioned in the Notice of the Meeting. If any other matters lawfully
come before the Meeting, and on all procedural matters at said Meeting, it is
intended that the enclosed proxy shall be voted in accordance with the best
judgment of the persons named as proxies therein, or their substitutes,
present and acting at the Meeting. A proxy may confer discretionary authority
to vote on matters brought before an annual meeting of shareholders if the
Trust did not have notice of the matter at least 45 days before the date on
which the Trust first mailed its proxy materials for the prior year's annual
meeting of shareholders (or date specified by an advance notice provision).

                                       6


Date for Receipt of Shareholder Proposals.

  No proposals were submitted by Shareholders for presentation at the Meeting.
Shareholder proposals which are intended to be presented at the Annual Meeting
in 2001 must be received at the principal executive offices of the Trust, 440
Lincoln Street, Worcester, MA 01653, on or before November 1, 2000, for
inclusion in the proxy statement and proxy related to such meeting.

           INFORMATION PERTAINING TO ALLMERICA FINANCIAL CORPORATION

  The following table lists the executive officers of the Trust, each of whom
is an employee of AFC or its affiliates:



     Name and Age of Officers                                            Served
           as of 3/1/00                   Position with the Trust        Since
     ------------------------             -----------------------        ------
                                                                   
John F. O'Brien (56)............... Chairman of the Board and Trustee     1989
Richard M. Reilly (61)............. President and Trustee                 1991
John P. Kavanaugh (45)............. Vice President and Trustee            1995
Paul T. Kane (43).................. Assistant Vice President and          1999
                                     Treasurer
                                     (Principal Accounting Officer)
Ann K. Tripp (41).................. Vice President                        2000
Stephen W. Bright (45)............. Vice President                        1997
George M. Boyd (55)................ Secretary                             1997

- --------
Messrs. O'Brien, Reilly and Kavanaugh and Ms. Tripp have been employees of AFC
or its affiliates for the last five years. Mr. Kane was Vice
President/Treasurer of Tax & Financial Services, BISYS Fund Services, 1997-
1999, and Director of Shareholder Reporting, Fidelity Investments, 1992-1997;
Mr. Bright was Client Relationship Manager, Connecticut Mutual, 1994-1995, and
Investment Officer, Travelers, 1986-1994; and Mr. Boyd was Director, Mutual
Fund Administration--Legal and Regulatory, Investors Bank & Trust Company,
1995-1996, and Vice President and Counsel, 440 Financial Group of Worcester,
Inc. and First Data Investor Services Group, Inc., 1992-1995.

                                       7


Quorum and Method of Tabulation.

  Thirty percent (30%) of the shares entitled to vote, present in person or
represented by proxy, constitute a quorum for the transaction of business at
the Meeting. Votes cast by proxy or in person at the Meeting will be counted by
persons appointed by the Trust to act as tellers for the Meeting.

  The tellers will count the total number of votes cast "for" approval of the
proposals for purposes of determining whether sufficient affirmative votes have
been cast. The tellers will count shares represented by proxies that withhold
authority to vote for a nominee for election as a trustee or that reflect
abstentions or "broker nonvotes" (i.e., shares held by brokers or nominees as
to which (i) instructions have not been received from the beneficial owners or
persons entitled to vote and (ii) the broker or nominee does not have the
discretionary voting power on a particular matter) as shares that are present
and entitled to vote on the matter for purposes of determining the presence of
a quorum. With respect to the election of Trustees and ratification of
accountants, neither withholding authority to vote nor abstentions nor broker
nonvotes have any effect on the outcome of the voting on the matter.

                      SHAREHOLDERS ARE URGED TO VOTE, SIGN
                      AND MAIL THEIR PROXIES IMMEDIATELY.

                                          John F. O'Brien
                                          Chairman

March 16, 2000
Worcester, MA

                                       8


                        ALLMERICA SECURITIES TRUST PROXY
           This Proxy is solicited on behalf of the Board of Trustees

  The undersigned hereby appoints Richard M. Reilly, Paul T. Kane and George M.
Boyd, and each of them, attorneys and proxies of the undersigned, with full
power of substitution, and does hereby request that the votes attributable to
all of the undersigned's shares be cast as directed, with all powers the
undersigned would possess if personally present, at the Annual Meeting of
Shareholders of Allmerica Securities Trust to be held at 440 Lincoln Street,
Worcester, Massachusetts 01653, on Wednesday, April 19, 2000 at 9:00 a.m.,
local time, and at any adjournment thereof.

  This Proxy when properly executed will be voted in the manner directed by the
Shareholder. If no direction is made, the Proxy will be voted "FOR" all
proposals. A proxy marked in such manner as not to withhold authority to vote
for the election of any nominee shall be deemed to grant such authority.

  Votes must be indicated (x) in Black or Blue ink. [X]

1. ELECTION OF    FOR all [_]    WITHHOLD AUTHORITY [_]   *EXCEPTIONS [_]
   TRUSTEES       nominees       to vote for all
                  listed         nominees listed
                  below.         below.

  Nominees: P. Kevin Condron, Cynthia A. Hargadon, Gordon Holmes, John P.
Kavanaugh, Bruce E. Langton, John F. O'Brien, Attiat F. Ott, Paul D. Paganucci,
Richard M. Reilly and Ranne P. Warner.

  (INSTRUCTIONS: To withhold authority to vote for any individual nominee, mark
the "Exceptions" box and write that nominee's name in the space provided
below.)

  *Exceptions __________________________________________________

  2. PROPOSAL TO RATIFY THE SELECTION OF PRICEWATERHOUSECOOPERS LLP AS
     INDEPENDENT ACCOUNTANTS.

              FOR  [_]     AGAINST  [_]       ABSTAIN  [_]

  3. In their discretion, the named proxies are authorized to vote upon such
other business as may properly come before the Meeting, or any adjournment
thereof.

  Please sign exactly as the name appears hereon. When signing as executor,
  administrator, attorney, trustee or guardian, please give full title. If a
  corporation, please sign in full corporate name by president or other
  authorized officer. If partnership, please sign in partnership name by
  authorized person. If joint owners, each owner should sign. 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.

              Dated: _____, 2000
              Signature __________________________
              Signature if held jointly __________

   Sign, Date and Return the Proxy Card Promptly Using the Enclosed Envelope.





                          ALLMERICA SECURITIES TRUST

              440 LINCOLN STREET, WORCESTER, MASSACHUSETTS 01653

                                                                 March 16, 2000

Dear Shareholders:

  Enclosed is a Notice of the Annual Meeting of Shareholders to be held on
April 19, 2000, to consider the election of Trustees and the ratification of
the selection of accountants.

  Your Trustees unanimously recommend that you vote for the proposals by
marking, dating and signing the enclosed proxy and returning it promptly.

                                          Respectfully,

                                          /s/ John F. O'Brien

                                          JOHN F. O'BRIEN
                                          Chairman

NOTICE: IT IS IMPORTANT THAT YOUR SHARES BE REPRESENTED AT THE MEETING,
         REGARDLESS OF THE NUMBER OF SHARES YOU HOLD. PLEASE SIGN AND RETURN
         PROMPTLY THE ENCLOSED PROXY IN THE ACCOMPANYING POSTAGE PAID
         ENVELOPE.