<Page>

   As filed with the Securities and Exchange Commission on November 20, 2002

                          1933 Act Registration No. 33-
                           1940 Act File No. 811-8322

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM N-14

           REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 [X]

                       [ ] Pre-Effective Amendment No. ___
                      [ ] Post-Effective Amendment No. ___

                     State Street Research Securities Trust
               (Exact name of Registrant as Specified in Charter)

                              One Financial Center
                           Boston, Massachusetts 02111
               (Address of Principal Executive Offices) (Zip Code)
                                 (617) 357-1200
                        (Area Code and Telephone Number)

                         Francis J. McNamara, III, Esq.
                Managing Director, Secretary and General Counsel
                   State Street Research & Management Company
                              One Financial Center
                           Boston, Massachusetts 02111
                     (Name and Address of Agent for Service)

                                   Copies to:
                            Gregory D. Sheehan, Esq.
                                  Ropes & Gray
                             One International Place
                        Boston, Massachusetts 02110-2624

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

                  Approximate Date of Proposed Public Offering:
   As soon as practicable after this Registration Statement becomes effective.

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

    It is proposed that this filing will become effective on December 20, 2002
                              pursuant to Rule 488.

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

<Page>

                          [STATE STREET RESEARCH LOGO]


                           STATE STREET RESEARCH FUNDS
                              One Financial Center
                           Boston, Massachusetts 02111

Dear Shareholder:                                                   January 2003

     You are cordially invited to attend a special shareholder meeting of the
State Street Research Large-Cap Growth Fund to be held on February , 2003.
Before the meeting, I would like to ask for your vote on an important proposal
affecting your fund.

     As described in the attached proxy statement, shareholders of your fund
will be asked to consider and approve an Agreement and Plan of Reorganization
between the Large-Cap Growth Fund and the State Street Research Legacy Fund.

     If the proposal is approved by the shareholders, the Legacy Fund would
acquire substantially all of the assets and liabilities of the Large-Cap
Growth Fund. As a result of this transaction, shareholders of the Large-Cap
Growth Fund would receive, in exchange for their shares of the Large-Cap
Growth Fund, shares of the corresponding class of the Legacy Fund with an
aggregate net asset value equivalent to the aggregate net asset value of
their respective investments in the Large-Cap Growth Fund on the transaction
date. THIS MEANS THAT ALTHOUGH SHAREHOLDERS OF THE LARGE-CAP GROWTH FUND MAY
END UP WITH A DIFFERENT NUMBER OF SHARES COMPARED TO WHAT THEY ORIGINALLY
HELD, THE TOTAL DOLLAR VALUE OF THEIR SHARES WILL REMAIN THE SAME. The
transaction is conditioned upon the receipt of an opinion of counsel to the
effect that the transaction would be free from federal income taxes to the
shareholders of each fund.

     THE BOARD OF TRUSTEES BELIEVES THE TRANSACTION IS IN THE BEST INTERESTS OF
EACH FUND AND ITS SHAREHOLDERS, AND UNANIMOUSLY RECOMMENDS THAT YOU VOTE FOR THE
PROPOSAL.

     I encourage you to carefully review the enclosed materials, which explain
the proposal in detail. As a shareholder, your vote is important, and we hope
that you will respond. By voting today, you can help your fund avoid the cost of
follow-up communications. You have the option of voting your proxy over the
Internet, as well as by mail or touch-tone phone. In the meantime, if you have
any questions about this proposal, please call 1-87-SSR-FUNDS (1-877-773-8637).

     As always, we very much appreciate your support as a shareholder of the
Large-Cap Growth Fund.

                                        Sincerely,




                                        Richard S. Davis
                                        Chairman of the Board, President
                                        and Chief Executive Officer
                                        State Street Research Growth Trust

<Page>

                               QUESTIONS & ANSWERS

Q:   WHAT AM I BEING ASKED TO VOTE ON?

A:   Shareholders of the State Street Research Large-Cap Growth Fund are being
     asked to vote on a proposed reorganization of the Fund into the State
     Street Research Legacy Fund (the "Reorganization"). THE BOARD OF TRUSTEES
     OF THE LARGE-CAP GROWTH FUND UNANIMOUSLY RECOMMENDS THAT SHAREHOLDERS VOTE
     IN FAVOR OF THIS PROPOSAL.

Q:   WHY HAS THE BOARD OF TRUSTEES RECOMMENDED THAT I VOTE IN FAVOR OF THE
     REORGANIZATION?

A:   The Board of Trustees of the Large-Cap Growth Fund believes the
     Reorganization may provide several benefits to shareholders of the
     Large-Cap Growth Fund, including potential economies of scale which may
     result from investing in a larger fund with the same investment manager and
     similar objectives and policies.

Q:   WHAT ARE THE MOST IMPORTANT DIFFERENCES BETWEEN THE LARGE-CAP GROWTH FUND'S
     INVESTMENT PROGRAM AND THE LEGACY FUND'S INVESTMENT PROGRAM?

A:   The most significant difference in the Funds' investment programs is that
     while the Large-Cap Growth Fund invests at least 80% of its assets in
     large-cap stocks and convertible securities that have long-term growth
     potential, the Legacy Fund invests at least 65% of its assets in mid- and
     large-cap companies. While the two funds share an emphasis on large-cap
     companies, the Legacy Fund has greater flexibility to invest in mid-cap
     companies and may invest up to 35% of its assets in small-cap companies and
     other securities. The Legacy Fund's increased ability to invest in mid-cap
     companies and other securities may lead to an increased level of risk for
     shareholders. In addition, in contrast to the Large-Cap Growth Fund, the
     Legacy Fund invests according to a tax-managed, buy-and-hold approach,
     which is designed to allow the Legacy Fund to focus on long-term capital
     appreciation while attempting to reduce capital gains tax liability for
     shareholders.

Q:   WHEN WILL THE REORGANIZATION OCCUR?

A:   If approved by the shareholders of both Funds, the Reorganization is
     expected to occur on or about February __, 2003.

Q:   WHAT IF I HAVE QUESTIONS?

A:   If you have questions about the Reorganization proposal itself, please call
     1-87-SSR-FUNDS (1-877-773-8637).

     IMPORTANT ADDITIONAL INFORMATION ABOUT THE PROPOSAL IS SET FORTH IN THE
ACCOMPANYING PROSPECTUS/PROXY STATEMENT. PLEASE READ IT CAREFULLY.

<Page>

                   STATE STREET RESEARCH LARGE-CAP GROWTH FUND

                                   A SERIES OF

                       STATE STREET RESEARCH GROWTH TRUST

                              One Financial Center
                           Boston, Massachusetts 02111

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS

                                  TO BE HELD ON
                                 FEBRUARY , 2003

To the Shareholders:

     This is to notify you that a Special Meeting of Shareholders of the State
Street Research Large-Cap Growth Fund, a series of State Street Research Growth
Trust (the "Trust"), will be held on February , 2003 at 4:00 p.m., Eastern time,
at the offices of the Trust at One Financial Center, 31st Floor, Boston,
Massachusetts 02111, for the following purposes:

          1. To approve or disapprove an Agreement and Plan of Reorganization
     providing for the acquisition of all of the assets and liabilities of the
     State Street Research Large-Cap Growth Fund by the State Street Research
     Legacy Fund; and

          2. To consider and act upon any matter incidental to the foregoing and
     to transact such other business as may properly come before the meeting and
     any adjournments thereof.

     The Board of Trustees of the Trust has fixed the close of business on
December ___, 2002 as the record date for determination of shareholders of State
Street Research Large-Cap Growth Fund entitled to notice of, and to vote at, the
Special Meeting and any adjournments thereof.

     IT IS VERY IMPORTANT THAT YOUR VOTING INSTRUCTIONS BE RECEIVED NO LATER
THAN February   , 2003. Instructions for shares held of record in the name of a
nominee, such as a broker-dealer or trustee of an employee benefit plan, may be
subject to earlier cut-off dates established by such intermediaries for receipt
of such instructions.

YOUR VOTE IS IMPORTANT REGARDLESS OF THE SIZE OF YOUR HOLDINGS IN THE FUND.
WHETHER OR NOT YOU EXPECT TO BE PRESENT AT THE MEETING, PLEASE COMPLETE AND SIGN
THE ENCLOSED PROXY FORM AND RETURN IT PROMPTLY IN THE ENCLOSED ENVELOPE. CERTAIN
SHAREHOLDERS MAY ALSO VOTE BY TELEPHONE OR OVER THE INTERNET; PLEASE SEE PAGES
__ TO __ FOR DETAILS. IF YOU VOTE BY PROXY AND THEN DESIRE TO VOTE IN PERSON AT
THE MEETING, YOU MAY REVOKE YOUR PROXY.

                                        By Order of the Board of Trustees



                                        Francis J. McNamara, III
                                        Secretary

January ___, 2003
Date of Notice

<Page>

                        STATE STREET RESEARCH LEGACY FUND

                                   A SERIES OF

                     STATE STREET RESEARCH SECURITIES TRUST


                              One Financial Center

                           Boston, Massachusetts 02111



                           PROSPECTUS/PROXY STATEMENT

     This Prospectus/Proxy Statement is furnished to the shareholders of State
Street Research Large-Cap Growth Fund (the "Large-Cap Growth Fund"), a series of
State Street Research Growth Trust (the "Growth Trust"), in connection with the
solicitation of proxies by and on behalf of the Board of Trustees of the Growth
Trust to be used at a Special Meeting of Shareholders of the Large-Cap Growth
Fund (the "Meeting") to be held at the Growth Trust's offices, One Financial
Center, 31st Floor, Boston, Massachusetts 02111, at 4:00 P.M., Eastern time, on
February , 2003, and at any adjournments thereof.

     Shareholders of record of the Large-Cap Growth Fund at the close of
business on December ___, 2002 (the "Record Date") are entitled to notice of,
and to vote at, the Meeting or any adjournments thereof. This Prospectus/Proxy
Statement, Proxy form and accompanying Notice of Special Meeting of Shareholders
were first sent or given to shareholders of each Fund on or about January ___,
2003.

     This Prospectus/Proxy Statement relates to the proposed reorganization
whereby the Legacy Fund would acquire substantially all of the assets and
liabilities of the Large-Cap Growth Fund (the "Reorganization"). The Legacy Fund
is a series of State Street Research Securities Trust (the "Securities Trust"
and, together with the Growth Trust, the "Trusts"). Each of the Trusts is an
open-end series management investment company organized as a Massachusetts
business trust. The Large-Cap Growth Fund and the Legacy Fund are referred to in
this Prospectus/Proxy Statement as the "Funds." The Reorganization is to be
effected through the transfer of all of the assets of the Large-Cap Growth Fund
to the Legacy Fund, in exchange for shares of beneficial interest of the Legacy
Fund (the "Reorganization Shares") and the assumption by the Legacy Fund of all
of the liabilities of the Large-Cap Growth Fund. This will be followed by the
distribution of the Reorganization Shares to the shareholders of the Large-Cap
Growth Fund in liquidation of the Large-Cap Growth Fund. As a result of the
proposed transaction, each shareholder of the Large-Cap Growth Fund will receive
in exchange for his or her Large-Cap Growth Fund shares a number of Legacy Fund
shares of the same class equal in value at the time of the exchange to the
aggregate value of the shareholder's Large-Cap Growth Fund shares. This means
that shareholders of the Large-Cap Growth Fund may end up with a different
number of shares compared to what they originally held, but the total dollar
value of their shares will remain the same.

     Because shareholders of the Large-Cap Growth Fund are being asked to
approve transactions which will result in their receiving shares of the Legacy
Fund, this Prospectus/Proxy Statement also serves as a Prospectus for the
Reorganization Shares of the Legacy Fund.

     This Prospectus/Proxy Statement explains concisely what shareholders of the
Large-Cap Growth Fund should know before investing in the Legacy Fund. Please
read it carefully and keep it for future reference.

     THE SECURITIES AND EXCHANGE COMMISSION ( THE "SEC") HAS NOT APPROVED OR
DISAPPROVED THESE SECURITIES OR PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROSPECTUS/PROXY STATEMENT. ANY

<Page>

REPRESENTATION TO THE CONTRARY IS A CRIME.

     Shareholders of the Large-Cap Growth Fund can lose money by investing in
the Legacy Fund. The Legacy Fund may not achieve its goals, and is not intended
as a complete investment program. An investment in the Legacy Fund is not a
deposit in a bank and is not insured or guaranteed by the Federal Deposit
Insurance Corporation or any other government agency.

     The following documents have been filed with the SEC and are incorporated
into this Prospectus/Proxy Statement by reference:

- -    the Legacy Fund's current Prospectus, dated March 1, 2002, including any
     supplements (the "Fund Prospectus");

- -    the Legacy Fund's current Statement of Additional Information, dated March
     1, 2002, including any supplements (the "Fund SAI");

- -    the Legacy Fund's Annual Report for the period ended October 31, 2002; and

- -    the Statement of Additional Information relating to this Prospectus/Proxy
     Statement, dated January ___, 2003 (the "Reorganization SAI").

     This Prospectus/Proxy Statement is accompanied by a copy of the Fund's
Prospectus and Annual Report. For a free copy of the Large-Cap Growth Fund
Prospectus, SAI or most recent Semiannual Report, or the Reorganization SAI,
please call 1-877-773-8637 or write to either Trust at:

     State Street Research Growth Trust OR
     State Street Research Securities Trust
     One Financial Center
     Boston, MA 02111
     ATTN: _________________
           c/o State Street Research Service Center

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

                            MANNER OF VOTING PROXIES

     If a proxy authorization ("Proxy") is properly given in time for a vote at
the Meeting (either by returning the paper Proxy form or by submitting a Proxy
electronically by telephone or over the Internet), the shares of the Fund
represented thereby will be voted at the Meeting in accordance with the
shareholder's instructions. The Proxy grants discretion to the persons named
therein, as proxies, to take such further action as they may determine
appropriate in connection with any other matter which may properly come before
the Meeting or any adjournments thereof. The Board of Trustees of the Growth
Trust does not currently know of any matter to be considered at the Meeting
other than the matters set forth in the Notice of Special Meeting of
Shareholders.

     Approval by the Large-Cap Growth Fund of the proposed Reorganization will
require the affirmative vote of the lesser of (i) 67% or more of the Class A,
Class B(1), Class B, Class C and Class S shares of the Fund present or
represented by proxy at the Meeting, voting together as a single class, if
holders of more than 50% of the outstanding Class A, Class B(1), Class B, Class
C and Class S shares of the Fund, taken as a single class, are present or
represented by proxy at the Meeting; or (ii) more than 50% of the outstanding
Class A, Class B(1), Class B, Class C and Class S shares of such Fund, voting
together as a single class. The holders of 30% of the shares of the Large-Cap
Growth Fund entitled to vote shall be a quorum for the Meeting. If the Fund
fails to approve the proposed Reorganization, the Reorganization will not occur.

     The persons named as proxies may propose one or more adjournments of the
Meeting on behalf of the Large-Cap Growth Fund without further notice to permit
further solicitation of Proxies, provided such persons determine that an
adjournment and additional solicitation are reasonable and in the interest of
shareholders of the Fund, after consideration of all relevant factors, including
the nature of the relevant proposal, the percentage of votes then cast, the
percentage of negative votes then cast, the nature of the proposed solicitation
activities and the nature of the reasons for such further solicitation. A
shareholder vote may be taken by the Fund on the proposal in this
Prospectus/Proxy Statement prior to such adjournment if sufficient votes have
been received and such vote is otherwise appropriate. Any such adjournment will
require the affirmative vote of a majority of the aggregate

                                       2
<Page>

number of shares of the Fund present on a given proposal at the Meeting in
person or by proxy.

     For purposes of determining the presence of a quorum for transacting
business at the Meeting and for determining whether sufficient votes have been
received for approval of any proposal to be acted upon at the Meeting,
abstentions may, in the discretion of the Large-Cap Growth Fund, be treated as
present at the Meeting and entitled to vote on the matter, but which have not
been voted. For this reason, abstentions could assist the Fund in obtaining a
quorum but would have the same effect as a vote against a proposal. Broker
"non-votes" ordinarily will not be considered present and entitled to vote on a
proposal. The Fund reserves discretion to count broker "non-votes" as present
based on specific instructions from a broker or nominee. Broker "non-votes" are
proxies from brokers or nominees indicating that such persons have not received
instructions from the beneficial owner or other persons entitled to vote shares
on a particular matter with respect to which the brokers or nominees do not
have, or choose not to exercise, discretionary power.

     A shareholder may vote:

     -    By telephone (through fully automated touch-tone voting);

     -    Over the Internet;

     -    By mail; or

     -    In person at the Meeting

BY TELEPHONE

     If telephone voting is available for your account, a toll-free telephone
number will be printed on your Proxy form. Prior to calling, you should read the
Prospectus/Proxy Statement and have your Proxy form at hand. (Please note,
however, that telephone voting is not available to shareholders whose shares are
held by a broker or other intermediary on the shareholder's behalf.)

     To use the automated touch-tone voting method, call the toll-free number
provided on the Proxy form. At the prompt, enter the control number provided on
the Proxy form, then follow the menu.

     A written confirmation of your telephone instructions will be mailed within
72 hours. You should immediately call 1-87-SSR-FUNDS (1-877-773-8637) toll-free
between 9 A.M. and 6 P.M. Monday through Friday Eastern time if no confirmation
is received or if your instructions have not been properly reflected.

INTERNET VOTING

     To vote over the Internet, please log on to WWW.SSRFUNDS.COM and click on
the proxy voting button. Prior to logging on, you should read the
Prospectus/Proxy Statement and have your Proxy form at hand. You should enter
the control number provided on the Proxy form, and follow the instructions on
the screen. If you receive more than one Proxy form, you may vote them during
the same session, using the relevant control numbers.

BY MAIL

     To vote by mail, you should date and sign the Proxy form included with this
Prospectus/Proxy Statement, indicate your vote on the proposal, and return the
form in the envelope provided.

                                       3
<Page>

ADDITIONAL INFORMATION

     SHAREHOLDERS VOTING THEIR PROXIES BY TELEPHONE OR OVER THE INTERNET SHOULD
NOT RETURN THEIR PROXY FORMS BY MAIL.

     A person submitting votes by telephone or over the Internet is deemed to
represent that he or she is authorized to vote on behalf of all owners of the
account, including spouses or other joint owners. By using the telephone or the
Internet to submit voting instructions, the shareholder is authorizing PFPC
Global Fund Services ("PFPC"), a proxy solicitation firm, and its agents, to
execute a proxy to vote the shareholder's shares at the Meeting as the
shareholder has indicated.

     Any shareholder who has given a Proxy, whether by telephone, over the
Internet or in written form, has the right to revoke it at any time prior to its
exercise by submitting a subsequent telephone or electronic vote, or a written
notice of revocation, or a later-dated Proxy, or by attending the Meeting and
voting his or her shares in person.

     The Growth Trust believes that the procedures for authorizing the execution
of a Proxy by telephone or over the Internet set forth above are reasonably
designed to ensure that the identity of the shareholder casting the vote is
accurately determined and that the voting instructions of the shareholder are
accurately recorded.

     In some cases, proxy solicitation materials may be included in one package
for more than one account with the same tax I.D. number and address of record.

     PFPC and its agents will assist with the mailing and tabulation effort and
may also solicit Proxies by contacting shareholders by telephone. The costs of
solicitation will be borne by the Large-Cap Growth Fund. The Fund's cost for
PFPC's services is not expected to exceed $_________. The Fund also will
reimburse brokerage firms and others for their expenses in forwarding
solicitation material to the beneficial owners of shares of the Funds.
Representatives of State Street Research Service Center and other
representatives of the Growth Trust may also solicit proxies.

     Questions about the proposal should be directed to State Street Research
Service Center at 1-87-SSR-FUNDS (1-877-773-8637), One Financial Center, Boston,
Massachusetts 02111.

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

                   SHARES OUTSTANDING AND BENEFICIAL OWNERSHIP

     As of the Record Date, as shown on the books of the Large-Cap Growth Fund,
there were issued and outstanding the following number of shares of beneficial
interest of each class of the Fund:

<Table>
<Caption>
                                           CLASS A     CLASS B(1)      CLASS B     CLASS C      CLASS S      TOTAL
                                           -------     ----------      -------     -------      -------      -----
                                                                                           
Large-Cap Growth Fund
</Table>

     As of November 30, 2002, the officers and Trustees of the Growth Trust as a
group beneficially owned less than 1% of the outstanding shares of each class of
the Large-Cap Growth Fund. As of November 30, 2002, to the best of the knowledge
of the Growth Trust, the following persons each owned of record or beneficially
5% or more of the outstanding shares of a class of the Large-Cap Growth Fund:

<Table>
<Caption>
                                                                                           % OF LEGACY
                                                                                            FUND HELD
FUND                         CLASS          SHAREHOLDER         % OF CLASS HELD        AFTER REORGANIZATION
- ----                         -----          -----------         ---------------        --------------------
                                                                           
LARGE-CAP GROWTH
   FUND
</Table>

*Beneficial Owner

                                       4
<Page>

     State Street Research & Management Company (the "Investment Manager" or
"State Street Research") serves as investment manager of the Funds and State
Street Research Investment Services, Inc. (the "Distributor") serves as
distributor of the Funds. The Investment Manager and the Distributor are located
at One Financial Center, Boston, Massachusetts 02111 and are indirect,
wholly-owned subsidiaries of MetLife, Inc. ("MetLife"). MetLife and its
affiliated entities have indicated that with respect to shares of the Large-Cap
Growth Fund for which they have voting authority, they intend to vote for and
against the proposal in the same relative proportion as do the other
shareholders of the Fund who cast votes at the Meeting.

                                       5
<Page>

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

                        OVERVIEW OF PROPOSED TRANSACTION

PROPOSED TRANSACTION

     The Trustees of the Growth Trust, on behalf of the Large-Cap Growth Fund,
and the Trustees of the Securities Trust, on behalf of the Legacy Fund, have
approved the Reorganization of the Large-Cap Growth Fund into the Legacy Fund.
The Reorganization is proposed to be accomplished pursuant to an Agreement and
Plan of Reorganization providing for the transfer of all of the assets of the
Large-Cap Growth Fund to the Legacy Fund, in exchange for shares of the Legacy
Fund and the assumption by the Legacy Fund of all the liabilities of the
Large-Cap Growth Fund, followed by the liquidation of the Large-Cap Growth Fund.
The form of Agreement and Plan of Reorganization is included in this
Prospectus/Proxy Statement as APPENDIX A.

     The investment objective and policies of the Legacy Fund are similar to the
investment objective and policies of the Large-Cap Growth Fund. However, there
are some important differences between the Funds; the most significant is that
the Legacy Fund's policy requires it to invest at least 65% of its assets in
securities of large- and mid-cap companies, whereas the Large-Cap Growth Fund's
policy is to invest at least 80% of its assets in large-cap companies. The
Legacy Fund's greater flexibility to invest in mid-cap companies and ability to
invest up to 35% of its assets in small-cap companies and other securities may
present increased risks for shareholders. Another important difference between
the Funds is that the Legacy Fund invests its assets according to a tax-managed
approach by generally selecting stocks with perceived long-term growth potential
and holding them for extended periods in order to allow capital appreciation
while reducing capital gains tax liability.

     More information about the Funds' investment objectives and policies, and
important differences between them, are contained below under "Comparison of
Investment Objectives, Policies, Restrictions and Risks."

     As a result of the proposed Reorganization, the Large-Cap Growth Fund will
receive a number of Class A, Class B(1), Class B, Class C, and Class S
Reorganization Shares of the Legacy Fund equal in value to the value of the net
assets of the Large-Cap Growth Fund being transferred and attributable to the
Class A, Class B(1), Class B, Class C, and Class S shares, respectively, of the
Large-Cap Growth Fund. Following the transfer, the Large-Cap Growth Fund will
distribute to each of its Class A, Class B(1), Class B, Class C, and Class S
shareholders a number of full and fractional Class A, Class B(1), Class B, Class
C, and Class S Reorganization Shares, respectively, of the Legacy Fund equal in
value to the aggregate value of the shareholder's Class A, Class B(1), Class B,
Class C, and Class S Large-Cap Growth Fund shares, as the case may be, and the
Large-Cap Growth Fund will be liquidated.

     The Class A, Class B(1), Class B, Class C, and Class S shares of the Legacy
Fund have identical characteristics to the corresponding classes of the
Large-Cap Growth Fund.

     Shareholders of the Large-Cap Growth Fund will not be charged a front end
sales load on the issuance of the Reorganization Shares, or a contingent
deferred sales charge (a "CDSC") on Large-Cap Growth Fund shares exchanged for
Reorganization Shares. The Reorganization Shares that shareholders of the
Large-Cap Growth Fund receive will be subject to a CDSC on redemption to the
same extent that the Large-Cap Growth Fund shares exchanged were so subject. In
other words, the Reorganization Shares will be treated as having been purchased
on the date that shareholders originally purchased the Large-Cap Growth Fund
shares and for the price each shareholder originally paid. For purposes of
determining the conversion date of the Class B(1) and Class B Reorganization
Shares into Class A shares, the Reorganization Shares will be treated as having
been acquired on the date that shareholders originally acquired the Large-Cap
Growth Fund shares (so that the conversion of such shares will be unchanged by
the Reorganization). See the Fund Prospectus for more information about the
characteristics of Class A, Class B(1), Class B, Class C, and Class S shares of
the Legacy Fund.

     As described more fully below, the Trustees of the Growth Trust unanimously
recommend that shareholders of the Large-Cap Growth Fund approve

                                       6
<Page>

the Reorganization. The Trustees believe the Reorganization may provide
several benefits to shareholders of the Large-Cap Growth Fund, including
potential economies of scale and enhanced investment management efficiencies
which may result from investing in a larger fund with similar investment
objectives and policies. See "The Proposal--Background and Reasons for the
Proposed Reorganization."

OPERATING EXPENSES

     The following tables contain the current fees for the Legacy Fund and the
Large-Cap Growth Fund and the pro-forma fees annualized after the
Reorganization.

     The contractual operating expenses of the Legacy Fund are higher than the
contractual operating expenses of the Large-Cap Growth Fund. In particular, the
Legacy Fund's management fees are 0.65% of the Fund's average annual net assets,
whereas the Large-Cap Growth Fund's management fee rate is 0.475%. However, the
Investment Manager has agreed that it will limit the Legacy Fund's total
operating expenses for one year following the Reorganization so that the Legacy
Fund's expenses are only marginally higher than the Large-Cap Growth Fund's
current expense levels for all classes. The Investment Manager is not obligated
to continue this expense limitation after the initial one-year period.

     The following tables summarize fees and expenses for Class A shares, Class
B(1) shares, Class B shares, Class C shares, and Class S shares:

- -    that the Large-Cap Growth Fund and Legacy Fund incurred in their fiscal
     years ended December 31, 2001 and October 31, 2002, respectively, restated
     to reflect the elimination of fee waivers and expense reimbursements
     previously in effect; and

- -    that the Legacy Fund would have incurred in its most recent fiscal year
     after giving effect on a pro forma combined basis to the proposed
     Reorganization, if the Reorganization had occurred at the beginning of such
     fiscal year.

     The tables are provided to help you understand an investor's share of the
operating expenses which each Fund incurs. The examples show the estimated
cumulative expenses attributable to a hypothetical $10,000 investment in the
Large-Cap Growth Fund, the Legacy Fund, and the Legacy Fund on a pro forma
basis, over specified periods. By translating "Total Annual Fund Operating
Expenses" into dollar amounts, these examples help you compare the costs of
investing in a particular Fund, or a particular class of shares, with the costs
of investing in other mutual funds.

                                       7
<Page>

SHAREHOLDER TRANSACTION EXPENSES (APPLICABLE TO BOTH FUNDS)

<Table>
<Caption>
                                                                    CLASS A     CLASS B(1)     CLASS B      CLASS C      CLASS S
                                                                    -------     ----------     -------      -------      -------
                                                                                                          
SHAREHOLDER FEES

Maximum Sales Charge Imposed on Purchase (as a percentage of
   offering price at the time of purchase)                           5.75%         None          None         None         None
Maximum Contingent Deferred Sales Charge (as a percentage of
    original purchase price or redemption price, whichever is
    lower)                                                           None(1)       5.00%(2)      5.00%(3)     1.00%(4)     None
</Table>
- ----------

(1)  Purchases of Class A shares of $1 million or more are not subject to a
     sales charge. If such shares are redeemed within 12 months of purchase, a
     contingent deferred sales charge of 1% will apply.
(2)  5.00% first year; 4.00% second year; 3.00% third and fourth years; 2.00%
     fifth year; 1.00% sixth year; and 0% thereafter.
(3)  5.00% first year; 4.00% second year; 3.00% third and fourth years; 2.00%
     fifth year; and 0% thereafter.
(4)  0% after first year.


<Table>
<Caption>
                                                                                           PRO FORMA
                                                              CURRENT EXPENSES             EXPENSES
                                                              ----------------             --------
                                                          LARGE-CAP
ANNUAL FUND OPERATING EXPENSES                             GROWTH          LEGACY          LEGACY
  (as a percentage of average net assets)                   FUND            FUND            FUND
                                                       --------------       ----            ----
                                                                                  
Management Fees
   Class A                                                 0.475%           0.65%           0.65%
   Class B(1)                                              0.475%           0.65%           0.65%
   Class B                                                 0.475%           0.65%           0.65%
   Class C                                                 0.475%           0.65%           0.65%
   Class S                                                 0.475%           0.65%           0.65%
12b-1 Fees
   Class A                                                  0.30%(1)        0.30%(1)        0.30%(1)
   Class B(1)                                               1.00%           1.00%           1.00%
   Class B                                                  1.00%           1.00%           1.00%
   Class C                                                  1.00%           1.00%           1.00%
   Class S                                                  0.00%           0.00%           0.00%
Other Expenses
   Class A                                                 0.595%           0.55%           0.48%
   Class B(1)                                              0.595%           0.55%           0.48%
   Class B                                                 0.595%           0.55%           0.48%
   Class C                                                 0.595%           0.55%           0.48%
   Class S                                                 0.595%           0.55%           0.48%
Total Fund Operating Expenses
   Class A                                                  1.37%           1.50%           1.43%
   Class B(1)                                               2.07%           2.20%           2.13%
   Class B                                                  2.07%           2.20%           2.13%
   Class C                                                  2.07%           2.20%           2.13%
   Class S                                                  1.07%           1.20%           1.13%
</Table>
- ----------
(1)  The Trustees may increase the current service/distribution fee rate shown
     for Class A shares at any time, provided that the fees do not exceed a
     maximum of 0.40%.

                                       8
<Page>

EXAMPLE OF FUND EXPENSES:

     An investment of $10,000 would incur the following expenses, assuming 5%
annual return, constant expenses and, except as indicated, redemption at the end
of each time period:

<Table>
<Caption>
                                                                                           PRO FORMA
                                                              CURRENT EXPENSES             EXPENSES
                                                              ----------------             --------
                                                         LARGE-CAP
                                                          GROWTH          LEGACY          LEGACY
                                                           FUND            FUND            FUND
                                                      --------------       ----            ----
                                                                                 
Class A
   1 year                                                 $  706          $  719          $  712
   3 years                                                $  984          $1,022          $1,001
   5 years                                                $1,282          $1,346          $1,312
   10 years                                               $2,127          $2,263          $2,190
Class B(1)
   1 year                                                 $  710          $  723          $  716
   3 years                                                $  949          $  988          $  967
   5 years                                                $1,314          $1,380          $1,344
   10 years                                               $2,221(1)       $2,357(1)       $2,284(1)
Class B(1) (no redemption)
   1 year                                                 $  210          $  223          $  216
   3 years                                                $  649          $  688          $  667
   5 years                                                $1,114          $1,180          $1,144
   10 years                                               $2,221(1)       $2,357(1)       $2,284(1)
Class B
   1 year                                                 $  710          $  723  $       $  716
   3 years                                                $  949          $  988          $  967
   5 years                                                $1,314          $1,380          $1,344
   10 years                                               $2,221(1)       $2,357(1)       $2,284(1)
Class B (no redemption)
   1 year                                                 $  210          $  223          $  216
   3 years                                                $  649          $  688          $  667
   5 years                                                $1,114          $1,180          $1,144
   10 years                                               $2,221(1)       $2,357(1)       $2,284(1)
Class C
   1 year                                                 $  310          $  323          $  316
   3 years                                                $  649          $  688          $  667
   5 years                                                $1,114          $1,180          $1,144
   10 years                                               $2,400          $2,534          $2,462
Class C (no redemption)
   1 year                                                 $  210          $  223          $  216
   3 years                                                $  649          $  688          $  667
   5 years                                                $1,114          $1,180          $1,144
   10 years                                               $2,400          $2,534          $2,462
Class S
   1 year                                                 $  109          $  122          $  115
   3 years                                                $  340          $  381          $  359
   5 years                                                $  590          $  660          $  622
   10 years                                               $1,306          $1,455          $1,375
</Table>
- ----------
(1)  Assumes conversion to Class A shares after eight years.

                                       9
<Page>

FEDERAL INCOME TAX CONSEQUENCES

     For federal income tax purposes, the Reorganization of the Large-Cap Growth
Fund into the Legacy Fund will be a tax-free reorganization. Accordingly, no
gain or loss will be recognized by the Large-Cap Growth Fund or by its
shareholders as a result of the Reorganization, and the aggregate tax basis of
the Reorganization Shares received by each shareholder of the Large-Cap Growth
Fund will be the same as the aggregate tax basis of the shareholder's Large-Cap
Growth Fund shares.

     Prior to the Exchange Date, the Large-Cap Growth Fund will declare a
distribution to shareholders, which together with all previous distributions,
will have the effect of distributing to shareholders all of its investment
company taxable income (computed without regard to the deduction for
dividends paid), net tax-exempt income and net realized capital gains, if
any, through the Exchange Date.

     For more information about the federal income tax consequences of the
Reorganization, see "Information About the Reorganization--Federal Income Tax
Consequences."

COMPARISON OF INVESTMENT OBJECTIVES, POLICIES, RESTRICTIONS AND RISKS

     The investment objectives, policies, restrictions and risks of the Funds,
and certain differences between them, are summarized below. For a more detailed
description of the investment techniques used by the Funds, please see the Fund
Prospectus and the current prospectus of the Large-Cap Growth Fund. For more
information concerning the risks associated with investments in the Funds, see
"Risk Factors" below.

LARGE-CAP GROWTH FUND

     The Large-Cap Growth Fund seeks to provide long-term growth of capital.
Under normal circumstances, the Large-Cap Growth Fund invests at least 80% of
its total assets in large-cap stocks and convertible securities that have
long-term growth potential. The Fund may invest up to 20% of its total assets in
other securities. The Large-Cap Growth Fund currently considers large-cap
companies to be those with market capitalizations within the range of companies
included in the Russell 1000 Growth Index.

     In selecting stocks, the Large-Cap Growth Fund first attempts to identify
the industries that over the long term will grow faster than the economy as a
whole. It then looks for companies within those industries that appear most
capable of sustained growth. While the Fund tends to emphasize larger,
established companies, from time to time it may also invest in other sizes or
types of companies, including smaller growth companies. Current income is not a
significant factor in stock selection

LEGACY FUND

     Like the Large-Cap Growth Fund, the Legacy Fund seeks to provide long-term
growth of capital. Under normal circumstances, the Fund invests at least 65% of
its total assets in stocks and convertible securities of mid- and large-cap
companies. Whereas the Large-Cap Growth Fund must invest at least 80% of its
assets in large-cap companies, the Legacy Fund is not limited to investing in
large-cap companies and has the option of investing its assets in mid-cap
companies. In addition, whereas the Large-Cap Growth Fund has the ability to
invest a maximum of 20% of its assets in securities other than those of
large-cap companies, the Legacy Fund has the ability to invest up to 35% of its
assets in securities other than those of large- and mid-cap companies. The
Legacy Fund's greater investment flexibility could lead to increased risk for
shareholders.

     Another difference between the Funds is that the Legacy Fund employs a
tax-managed strategy whereby the Fund generally seeks to identify stocks with
long-term growth potential and hold them for extended periods. This buy-and-hold
approach is designed to allow the Fund to focus on long-term capital
appreciation while reducing (though not eliminating) capital gains distributions
and the resulting tax liability for shareholders. This approach could result
in missed opportunities to realize gains and ultimately lower long-term
performance. While the Fund generally expects to invest across a broad range of
industries, it may favor companies in those

                                       10
<Page>

industries that appear to offer higher potential for long-term growth.

     In addition to the principal investment strategies for the Funds described
above, each Fund may also engage in other types of investment practices, such as
investing in bonds, small company securities and derivatives. Each Fund may also
engage in securities lending and in defensive investing. More detailed
descriptions of these investment practices, and associated risks, are included
in the Prospectus and SAI of each Fund.

     There are also several differences between the fundamental investment
restrictions of the Large-Cap Growth Fund and the Legacy Fund. As a result of
the Reorganization, the Legacy Fund's fundamental investment restrictions will
apply to shares issued to former shareholders of the Large-Cap Growth Fund. The
Funds' Investment Manager believes that the differences between the two Funds'
fundamental investment restrictions are not material. The table contained in
APPENDIX B to this Prospectus/Proxy Statement summarizes the differences in the
Funds' fundamental investment restrictions. The table, as well as the summary
contained in this paragraph and the preceding paragraph, are qualified in their
entirety by reference to the complete text of the investment restrictions of
each Fund, which are set forth in their respective prospectuses and SAI's.

RISK FACTORS

     Certain risks associated with an investment in the Legacy Fund are
summarized below. Because the Legacy Fund and the Large-Cap Growth Fund share
certain policies described more fully above under "Overview of Proposed
Transactions--Comparison of Investment Objectives, Policies, Restrictions and
Risks," some of the risks of an investment in the Legacy Fund are substantially
similar to the risks of an investment in the Large-Cap Growth Fund. However, the
risks associated with the Legacy Fund's employment of a tax-managed strategy are
risks that are attributable to the Legacy Fund and not shared by the Large-Cap
Growth Fund.

     Because the Legacy Fund invests primarily in stocks, its major risks are
those of stock investing, including sudden and unpredictable drops in value and
the potential for periods of lackluster performance.

     The Legacy Fund's investment approach, with its emphasis on keeping
portfolio turnover low, means that the Fund could continue to hold various
stocks through adverse markets rather than selling them. This could cause the
Fund to have deeper losses during down markets than a fund that has invested in
smaller stocks but does not seek reduced turnover. To the extent that the Fund
does sell securities during times of volatility, either for investment
management reasons or to meet shareholder redemption requests, portfolio
turnover and capital gains distributions are likely to increase as a result. For
this reason, shareholders who actively trade or exchange fund shares could
adversely affect the management of the Fund and are discouraged from investing
in it.

     While the Legacy Fund's buy-and-hold approach is designed to allow it to
capture long-term gains, prices of some stocks may not return to previous highs.
To the extent that the Fund continues to hold these stocks, it may miss
opportunities to realize gains and its long-term performance may be reduced.

     Because the Legacy Fund may invest in U.S. companies with some
international business, and also may invest in foreign companies, it is subject
to the risks associated with international investing.

     The success of the Legacy Fund's investment strategies depends largely on
the portfolio manager's fundamental analysis of individual companies and
assessment of the economic environment for their businesses.

     The Legacy Fund's shares will rise and fall in value and there is a risk
that shareholders could lose money by investing in the Fund. Also, the Fund
cannot be certain that it will achieve its goal. Finally, Fund shares are not
bank deposits and are not guaranteed, endorsed or insured by any financial
institution, government entity or the FDIC.

     A more detailed description of the risks associated with an investment in
the Legacy Fund may be found in the Fund Prospectus under the captions "Other
Information--Other Securities and Risks" and in the Fund SAI under the captions
"Additional Information Concerning Investment Restrictions, Certain Risks and
Investment Techniques" and "Debt Instruments and Permitted Cash Investments."

                                       11
<Page>

COMPARISON OF DISTRIBUTION POLICIES AND
PURCHASE, EXCHANGE AND REDEMPTION PROCEDURES

     Both the Large-Cap Growth Fund and the Legacy Fund declare dividends daily
and pay them monthly. Each Fund distributes any net realized capital gains
annually. It is expected that, shortly prior to the Exchange Date (as defined in
the Agreement and Plan of Reorganization), the Large-Cap Growth Fund will
declare and distribute as a special dividend any investment company taxable
income (computed without regard to the deduction for dividends paid) and any net
realized capital gains through the Exchange Date not previously distributed.

     The Funds have identical procedures for purchasing shares. Each of the
Funds offers five classes of shares, Class A, Class B(1), Class B, Class C and
Class S. Class A, Class B(1), Class C and Class S shares of the Funds may be
purchased at their net asset value next determined, plus applicable sales
charges in the case of Class A shares, through broker-dealers that have dealer
agreements with the Distributor or through the Distributor in certain instances.
Class B shares of the Funds are available only to current Class B shareholders
through reinvestment of dividends and distributions or through exchanges from
existing Class B accounts of other State Street Research funds. Class S shares
of the Funds are available only through certain advisory accounts of the
Investment Manager and other special programs, including programs through
financial professionals with recordkeeping and other services.

     Class B(1) shares of the Funds are subject to a CDSC at declining rates if
redeemed within six years of purchase. Class B shares of the Funds are subject
to a CDSC at declining rates if redeemed within five years of purchase. Class C
shares of the Funds are subject to a CDSC if redeemed within one year of
purchase. Class B(1), Class B and Class C Reorganization Shares will be subject
to a CDSC on redemption to the same extent that the Class B(1), Class B and
Class C Large-Cap Growth Fund shares were so subject. No sales charge will be
charged to Large-Cap Growth Fund shareholders on the issuance of the
Reorganization Shares, and no CDSC will be charged by the Large-Cap Growth Fund.
Following is a brief summary of the main characteristics of each class:

CLASS A SHARES. Class A shares of each Fund are sold subject to a front-end
sales load of 4.50% or less, with lower sales charges applicable to larger
investments. Class A shares are also subject to a servicing and distribution fee
at a current aggregate annual rate of 0.30% (subject to a maximum annual rate of
0.40%) of assets attributable to Class A shares. Class A shares are generally
not subject to a CDSC, except in the case of certain large purchases of Class A
shares without a sales load which are redeemed within one year of purchase.

CLASS B(1) SHARES. Class B(1) shares of each Fund are sold at net asset value
without any initial sales charge, but subject to a CDSC at declining rates if
the shares are redeemed within six years of purchase. Class B(1) shares of each
Fund are subject to servicing and distribution fees at an aggregate annual rate
of 1.00% of assets attributable to Class B(1) shares. Class B(1) shares convert
automatically to Class A shares eight years after purchase.

CLASS B SHARES. Class B shares of each Fund are sold at net asset value without
any initial sales charge, but subject to a CDSC at declining rates if the shares
are redeemed within five years of purchase. Class B shares of each Fund are
subject to servicing and distribution fees at an aggregate annual rate of 1.00%
of assets attributable to Class B shares. Class B shares convert automatically
to Class A shares eight years after purchase. Note that Class B shares of each
Fund are available only to current shareholders through reinvestment of
dividends and distributions or through exchanges from existing Class B accounts
of other State Street Research funds.

CLASS C SHARES. Class C shares of each Fund are also sold at net asset value
without an initial sales charge, but subject to a CDSC if redeemed within the
first year of purchase. Class C shares are subject to servicing and distribution
fees at an aggregate annual rate of 1.00% of assets attributable to Class C
shares. Class C shares never convert to Class A shares.

CLASS S SHARES. Class S shares of each Fund are sold at net asset value without
an initial sales charge, and are not subject to a CDSC. Class S shares are not
subject to servicing and distribution fees, and therefore have lower annual
expenses than other share classes of the Funds. Note, however, that Class S
shares of each Fund are available only through certain advisory accounts of the
Investment Manager and through other special programs, including

                                       12
<Page>

programs through financial professionals offering recordkeeping and other
services. Such programs typically involve special conditions and separate fees,
in addition to those described here.

     Shares of each Fund can generally be exchanged for shares of the same class
of any other publicly offered and available State Street Research Fund. For more
details, see the Funds' Prospectuses and SAI's.

     The Funds have identical redemption procedures. Shares of each Fund may be
redeemed at their net asset value next determined after receipt of the
redemption request, less any applicable CDSC, on any day the New York Stock
Exchange is open. Shares can be redeemed by mail, by telephone, through
broker-dealers if a dealer agreement is in place, by wire communication, by
Internet, by check, by Systematic Withdrawal Plan, or by electronic funds
transfer.

     Each Fund offers the same shareholder services, including reinvestment
privileges, a systematic withdrawal plan (with automatic bank connection), a
dividend allocation program, telephone purchases, telephone exchanges, telephone
redemptions, Internet account access through the EZ-Trader service, and access
to the Investamatic Program, an automatic investment program. Because each Fund
currently offers the same shareholder services, after the closing of the
proposed Reorganization, the same services will continue to be available to the
shareholders of the Large-Cap Growth Fund.

     See the Funds' Prospectuses for further information.

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

                                  THE PROPOSAL

APPROVAL OR DISAPPROVAL OF AGREEMENT AND PLAN OF REORGANIZATION

     Shareholders of the Large-Cap Growth Fund are being asked to approve or
disapprove the Reorganization between the Large-Cap Growth Fund and the Legacy
Fund (the "Proposal"). The Reorganization is proposed to take place pursuant to
an Agreement and Plan of Reorganization between the Large-Cap Growth Fund and
the Legacy Fund (the "Agreement"), in the form attached to this Prospectus/Proxy
Statement as APPENDIX A.

     The Agreement provides, among other things, for the transfer of all of the
assets of the Large-Cap Growth Fund to the Legacy Fund in exchange for (i) the
issuance to the Large-Cap Growth Fund of the Class A, Class B(1), Class B, Class
C, and Class S Reorganization Shares, the number of which will be calculated
based on the value of the net assets attributable to the Class A, Class B(1),
Class B, Class C, and Class S shares, respectively, of the Large-Cap Growth Fund
acquired by the Legacy Fund and the net asset value per Class A, Class B(1),
Class B, Class C, and Class S shares of the Legacy Fund and (ii) the assumption
by the Legacy Fund of all of the liabilities of the Large-Cap Growth Fund, all
as more fully described below under "Information About the Reorganization."

     After receipt of the Reorganization Shares, the Large-Cap Growth Fund will
cause the Class A Reorganization Shares to be distributed to its Class A
shareholders, the Class B(1) Reorganization Shares to be distributed to its
Class B(1) shareholders, the Class B Reorganization Shares to be distributed to
its Class B shareholders, the Class C Reorganization Shares to be distributed to
its Class C shareholders, and the Class S Reorganization Shares to be
distributed to its Class S shareholders, in complete liquidation of the
Large-Cap Growth Fund. Each shareholder of the Large-Cap Growth Fund will
receive a number of full and fractional Class A, Class B(1), Class B, Class C,
and Class S Reorganization Shares equal in value at the date of the exchange to
the aggregate value of the shareholder's Class A, Class B(1), Class B, Class C,
and Class S Large-Cap Growth Fund shares, as the case may be.

     BOARD OF TRUSTEES' RECOMMENDATION. THE BOARD OF TRUSTEES OF STATE STREET
RESEARCH GROWTH TRUST, ON BEHALF OF THE LARGE-CAP GROWTH FUND, HAS VOTED
UNANIMOUSLY TO APPROVE THE PROPOSED REORGANIZATION AND TO RECOMMEND THAT
SHAREHOLDERS OF THE LARGE-CAP GROWTH FUND ALSO APPROVE THE REORGANIZATION.

     REQUIRED SHAREHOLDER VOTE. Approval of the proposed Reorganization by the
Large-Cap Growth Fund will require the affirmative vote of the

                                       13
<Page>

lesser of (i) 67% or more of the Class A, Class B(1), Class B, Class C and Class
S shares of the relevant Fund present or represented by proxy at the Meeting,
voting together as a single class, if holders of more than 50% of the
outstanding Class A, Class B(1), Class B, Class C and Class S shares of the
Large-Cap Growth Fund, taken as a single class, are present or represented by
proxy at the Meeting; or (ii) more than 50% of the outstanding Class A, Class
B(1), Class B, Class C and Class S shares, voting together as a single class,
provided a quorum is present at the Meeting. The holders of 30% of the shares of
the Large-Cap Growth Fund entitled to vote shall be a quorum for the Meeting.

BACKGROUND AND REASONS FOR THE PROPOSED REORGANIZATION

     The Board of Trustees of the Growth Trust, including all of its Trustees
who are not "interested persons" of the Trust, has unanimously determined that
the Reorganization would be in the best interests of the Large-Cap Growth Fund
and the Fund's shareholders, and that the interests of the shareholders of the
Large-Cap Growth Fund would not be diluted as a result of effecting the
Reorganization.

     At a meeting held on October 7, 2002, the Board unanimously approved the
proposed Reorganization and recommended its approval by shareholders of the
Large-Cap Growth Fund. In reaching this conclusion, the Board considered a
number of factors, including the smaller asset size of the Large-Cap Growth Fund
compared to the Legacy Fund; the more favorable performance record of the Legacy
Fund; the enhanced investment management efficiencies that may result from
combining the operations of two separate funds that invest in similar
securities; and the general compatibility of the Funds' investment objectives
and policies. The Board also received information about the fees and expenses
charged by the Large-Cap Growth Fund and the Legacy Fund. The Investment Manager
has agreed that for a one-year period from the date of the Reorganization, it
will maintain for the Legacy Fund total fund operating expenses (as a percentage
of total assets) that are only marginally higher than those of the Large-Cap
Growth Fund as of September 30, 2002. Thereafter, total fund operating expenses
(as a percentage of total assets) for the Legacy Fund may be higher. The Board
determined that in light of the above-mentioned potential benefits to be gained
from the proposed Reorganization, such benefits outweigh the possible increase
in total expenses of the Legacy Fund.

     As reflected in the capitalization table in "Information About the
Reorganization--Capitalization" set forth below, the Large-Cap Growth Fund is
significantly smaller in asset size than the Legacy Fund. As of October 31,
2002, the Large-Cap Growth Fund had total assets of approximately $100 million,
compared to the Legacy Fund, which had approximately $241 million in total
assets. The merger is expected to result in greater investment leverage and
market presence for the Legacy Fund. In addition, former Large-Cap Growth Fund
shareholders would benefit from the resulting economies of scale attributable to
the larger asset size of the Legacy Fund. Because each Fund has the same
Investment Manager, custodian and distributor, combining the Funds could, over
time, produce administrative economies of scale, resulting in net benefits to
each Fund's shareholders. The Board considered, among other things, the benefits
to the Large-Cap Growth Fund of the elimination of duplicate services such as
producing separate prospectuses and shareholder reports. Of course, there can be
no assurance that the Reorganization will result in expense savings for
shareholders.

     The Board also received information relating to the historical performance
of the Large-Cap Growth Fund and the Legacy Fund. Because the Large-Cap Growth
Fund commenced operations approximately 37 years prior to the commencement of
operations of the Legacy Fund, it is not possible to compare the performance of
the Funds since their respective inception dates. However, for the four-year
period ended December 31, 2001, the Legacy Fund's performance history is
superior to the performance history of the Large-Cap Growth Fund. In addition,
the Legacy Fund's year-to-date total return as of October 31, 2002 of -20.76%
(Class A shares, at maximum sales charge), compares favorably with the Large-Cap
Growth Fund's year-to-date total return of -30.21% (Class A shares, at maximum
sales charge).

     In addition, the Board, upon the recommendation of the Funds' Investment
Manager, concluded that in the absence of the Proposal it would be in the best
interests of the Large-Cap Growth Fund to proceed with the liquidation of the
Fund. The Board considered the fact that the Reorganization is expected to be
conducted on a tax-free basis for the shareholders of the Large-Cap

                                       14
<Page>

Growth Fund, whereas a liquidation of the Fund outside the context of the
Reorganization would be a taxable event for the Fund, potentially increasing the
tax liabilities of the Fund's shareholders.

     The Board concluded that the above-mentioned considerations supported
approval of the proposed Reorganization. While it is acknowledged that fees and
expenses will increase and economies of scale cannot be guaranteed, the Board
concluded that the Reorganization, as compared to the liquidation of the
Large-Cap Growth Fund, was in the best interest of the Fund and shareholders.

                                       15
<Page>

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

                      INFORMATION ABOUT THE REORGANIZATION

     AGREEMENT AND PLAN OF REORGANIZATION. The proposed Agreement and Plan of
Reorganization provides that the Legacy Fund will acquire all of the assets of
the Large-Cap Growth Fund in exchange for the issuance of the Class A, Class
B(1), Class B, Class C and Class S Reorganization Shares and for the assumption
by the Legacy Fund of all of the liabilities of the Large-Cap Growth Fund, all
as of the Exchange Date. The following discussion of the Agreement is qualified
in its entirety by the full text of the Agreement, the form of which is attached
as APPENDIX A to this Prospectus/Proxy Statement.

     The Large-Cap Growth Fund will sell all of its assets to the Legacy Fund,
and, in exchange, the Legacy Fund will assume all of the liabilities of the
Large-Cap Growth Fund and deliver to the Large-Cap Growth Fund a number of full
and fractional Class A, Class B(1), Class B, Class C and Class S Reorganization
Shares having an aggregate net asset value equal to the value of the assets of
the Large-Cap Growth Fund attributable to its Class A, Class B(1), Class B,
Class C and Class S shares, respectively, less the value of the liabilities of
the Large-Cap Growth Fund assumed by the Legacy Fund attributable to each such
class of shares.

     Immediately following the Exchange Date, the Large-Cap Growth Fund will
distribute pro rata to its shareholders of record as of the close of business on
the Exchange Date the full and fractional Reorganization Shares received by the
Large-Cap Growth Fund, with Reorganization Shares being distributed to
corresponding classes of shareholders of the Large-Cap Growth Fund. As a result
of the proposed transaction, each holder of Class A, Class B(1), Class B, Class
C, and Class S shares of the Large-Cap Growth Fund will receive a number of
Class A, Class B(1), Class B, Class C, and Class S Reorganization Shares equal
in aggregate value at the Exchange Date to the value of the Class A, Class B(1),
Class B, Class C, and Class S shares of the Large-Cap Growth Fund held by the
shareholder.

     This distribution of Reorganization Shares will be accomplished by the
establishment of accounts on the share records of the Legacy Fund in the names
of the Large-Cap Growth Fund shareholders, each account representing the
respective number of full and fractional Class A, Class B(1), Class B, Class C,
and Class S Reorganization Shares due such shareholder. Because the shares of
the Legacy Fund will not be represented by certificates, certificates for
Reorganization Shares will not be issued. After the Exchange Date, certificates
originally representing shares of Class A or Class S of the Large-Cap Growth
Fund will be rendered non-negotiable. The accounts established with the Legacy
Fund will have the same shareholder account privileges and elections as existed
with the corresponding former accounts in the Large-Cap Growth Fund.

     The consummation of the Reorganization is subject to the conditions set
forth in the Agreement, any of which may be waived, except for the condition
requiring shareholder approval by the Large-Cap Growth Fund of the Agreement.
The Agreement may be terminated and the Reorganization abandoned at any time,
before or after approval by the shareholders of the Large-Cap Growth Fund, prior
to the Exchange Date, by mutual consent of the Funds or, if any condition set
forth in the Agreement has not been fulfilled and has not been waived by the
party entitled to its benefits, by such party.

     The fees and expenses for the Reorganization, including legal and
accounting expenses, portfolio transfer taxes (if any) or other similar expenses
incurred in connection with the consummation of the transactions contemplated by
the Agreement and Plan of Reorganization, will be allocated ratably between the
two Funds in proportion to their net assets as of the date of the
Reorganization, with two exceptions. First, the trading costs associated with
the repositioning of the portfolio of the Large-Cap Growth Fund prior to the
Reorganization will be borne by the Large-Cap Growth Fund; secondly, the costs
of proxy materials and proxy solicitations will be borne by the Large-Cap Growth
Fund. However, to the extent that any payment by either Fund of such fees and
expenses would result in the disqualification of either Fund as a "regulated
investment company" within the meaning of the Internal Revenue Code of 1986, as

                                       16
<Page>

amended (the "Code"), such fees and expenses will be paid directly by the party
incurring them.

     DESCRIPTION OF THE REORGANIZATION SHARES. Full and fractional
Reorganization Shares will be issued to the Large-Cap Growth Fund's shareholders
in accordance with the procedure under the Agreement as described above. The
Reorganization Shares are Class A, Class B(1), Class B, Class C, and Class S
shares of the Legacy Fund, which have characteristics identical to those of the
corresponding class of Large-Cap Growth Fund shares with respect to sales
charges, CDSC's, conversion and 12b-1 servicing and distribution fees.

     ORGANIZATION. Each of the Reorganization Shares will be fully paid and
nonassessable by the Legacy Fund when issued, will be transferable without
restriction, and will have no preemptive or conversion rights, except that
certain Class B(1) and Class B Reorganization Shares convert automatically into
Class A shares as described above. The Master Trust Agreement of State Street
Research Securities Trust, as amended (the "Declaration of Trust"), permits the
Trustees of the Trust to divide its shares, without shareholder approval, into
two or more series of shares representing separate investment portfolios and to
further divide any such series, without shareholder approval, into two or more
classes of shares, such series and/or classes having such preferences and
special or relative rights and privileges as the Trustees may determine. The
Legacy Fund's shares are currently divided into five classes. The rights of
shareholders of the Large-Cap Growth Fund and the Legacy Fund are identical.

     FEDERAL INCOME TAX CONSEQUENCES. The Reorganization will be a tax-free
reorganization. The Reorganization will be conditioned on receipt of an opinion
from Ropes & Gray, special counsel to the Trusts, to the effect that, on the
basis of the existing provisions of the Code, current administrative rules and
court decisions, for federal income tax purposes: (i) under Section 361 of the
Code, no gain or loss will be recognized by the Large-Cap Growth Fund as a
result of the Reorganization; (ii) under Section 354 of the Code, no gain or
loss will be recognized by shareholders of the Large-Cap Growth Fund on the
distribution of Reorganization Shares to them in exchange for their shares of
the Large-Cap Growth Fund; (iii) under Section 358 of the Code, the aggregate
tax basis of the Reorganization Shares that a Large-Cap Growth Fund shareholder
receives in place of his or her Large-Cap Growth Fund shares will be the same as
the aggregate basis of his or her Large-Cap Growth Fund shares; (iv) under
Section 1223(1) of the Code, a Large-Cap Growth Fund shareholder's holding
period for the Reorganization Shares received pursuant to the Agreement will be
determined by including the holding period for the Large-Cap Growth Fund shares
exchanged for the Reorganization Shares, provided that the shareholder held the
Large-Cap Growth Fund shares as a capital asset; (v) under Section 1032 of the
Code, no gain or loss will be recognized by the Legacy Fund as a result of the
Reorganization; (vi) under Section 362(b) of the Code, the Legacy Fund's tax
basis in the assets that the Legacy Fund receives from the Large-Cap Growth Fund
will be the same as the Large-Cap Growth Fund's basis in such assets; and (vii)
under Section 1223(2) of the Code, the Legacy Fund's holding period in such
assets will include the Large-Cap Growth Fund's holding period in such assets.
The opinion will be based on certain factual certifications made by officers of
the Trust, and will also include certain qualifications and be based on
customary assumptions.

     Prior to the Exchange Date, the Large-Cap Growth Fund will declare a
distribution to shareholders which, together with all previous distributions,
will have the effect of distributing to shareholders all of its investment
company taxable income (computed without regard to the deduction for dividends
paid), net tax-exempt income and net realized capital gains, if any, through the
Exchange Date.

     The Legacy Fund's ability to carry forward the pre-merger losses of the
Large-Cap Growth Fund and use them to offset future gains will likely be
limited. For example, if the merger had taken place on September 30, 2002,
approximately 70% of the Large-Cap Growth Fund's net losses would have become
permanently unavailable for use by the Legacy Fund by reason of the merger.
In addition, as a result of the merger, the benefit of the available
pre-merger losses of the Large-Cap Growth Fund will be spread among a broader
group of shareholders than would have been the case absent the merger. As of
September 30, 2002, the pre-merger losses of the Large-Cap Growth Fund
equaled approximately 108% of its net asset value. If the merger had taken
place on September 30, 2002, pre-merger losses equaling only 63% of the
combined fund's net asset value would have been available to offset future
gains. As a result of this reduction in the relative amount of the capital
loss carryforwards and unrealized losses available to current shareholders of
the Large-Cap Growth Fund following the merger, such shareholders could,
under certain circumstances, pay more taxes, or pay taxes sooner, than they
would if the merger did not occur.

                                       17
<Page>

     The foregoing description of the federal income tax consequences of the
Reorganization is made without regard to the particular facts and circumstances
of any shareholder. Shareholders are urged to consult their own tax advisers as
to the specific consequences to them of the Reorganization, including the
applicability and effect of state, local, foreign and other tax laws.

     CAPITALIZATION. The following tables show the capitalization of the
Large-Cap Growth Fund and the Legacy Fund as of October 31, 2002, and of the
Legacy Fund on a pro forma basis as of October 31, 2002, giving effect to the
proposed acquisition by the Legacy Fund of the assets and liabilities of the
Large-Cap Growth Fund at net asset value:


                              CAPITALIZATION TABLES
                                OCTOBER 31, 2002
                                   (UNAUDITED)

<Table>
<Caption>
                                                          LARGE-CAP
                                                           GROWTH          LEGACY          PRO FORMA
                                                            FUND            FUND            COMBINED
                                                            ----            ----            --------
                                                                                  
Net assets (000's omitted)
   Class A                                                 $17,396         $72,475           $89,871
   Class B(1)                                               10,555          84,737            95,292
   Class B                                                  12,426          36,288            48,714
   Class C                                                   2,007          27,235            29,242
   Class S                                                  51,038           3,831            54,869
Shares outstanding (000's omitted)
   Class A                                                   4,823           7,953             9,863
   Class B(1)                                                3,208           9,633            10,832
   Class B                                                   3,779           4,084             5,481
   Class C                                                     610           3,095             3,323
   Class S                                                  13,789             413             5,913
Net asset value per share
   Class A                                                   $3.61           $9.11             $9.11
   Class B(1)                                                 3.29            8.80              8.80
   Class B                                                    3.29            8.89              8.89
   Class C                                                    3.29            8.80              8.80
   Class S                                                    3.70            9.28              9.28
</Table>

     Pro forma financial statements of the Legacy Fund as of and for the twelve
months ended October 31, 2002 are included in the Reorganization SAI. Because
the Agreement provides that the Legacy Fund will be the "surviving" Fund
following the Reorganization and because the Legacy Fund's investment objective
and policies will remain unchanged by the Reorganization, the pro forma
financial statements reflect the transfer of the assets and liabilities of the
Large-Cap Growth Fund to the Legacy Fund as contemplated by the Agreement.
Shareholders should note that while the fiscal year end for the Large-Cap Growth
Fund is December 31, the Legacy Fund's fiscal year end is October 31.

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

                           INFORMATION ABOUT THE FUNDS

     SHAREHOLDER PROPOSALS AT FUTURE MEETINGS OF SHAREHOLDERS. The Master Trust
Agreement of the Securities Trust does not provide for annual meetings of
shareholders, and the Securities Trust does not currently intend to hold such a
meeting for shareholders of the Legacy Fund in 2003. Shareholder proposals for
inclusion in a Prospectus/Proxy Statement for any subsequent

                                       18
<Page>

meeting of the Legacy Fund's shareholders must be received by the Securities
Trust a reasonable period of time prior to any such meeting. If the
Reorganization is consummated, there will be no subsequent meetings of the
shareholders of the Large-Cap Growth Fund.

     Other information regarding the Funds, including information with respect
to their investment objectives, policies and restrictions and financial history
may be found in the Reorganization SAI, the Funds' Prospectuses and SAI's, and
the Funds' most recent Annual and Semiannual Reports, which are available upon
request by calling 1-877-773-8637.

     The Securities Trust is subject to the informational requirements of the
Securities Exchange Act of 1934, as amended, and in accordance with such Act
file reports and other information with the Securities and Exchange Commission.
Proxy materials, reports and other information filed by the Securities Trust
with respect to the Legacy Fund can be inspected and copied at the Public
Reference Facilities maintained by the Securities and Exchange Commission at 450
Fifth Street, N.W., Washington, D.C. 20549; 233 Broadway, New York, New York
10279; and 500 West Madison Street, Suite 1400, Chicago, Illinois 60661. Copies
of such material can also be obtained from the Public Reference Branch, Office
of Consumer Affairs and Information Services, Securities and Exchange
Commission, Washington, D.C. 20549, at prescribed rates, or at no charge from
the EDGAR database on the SEC's web site at "www.sec.gov."



                                                               January ___, 2003


                                       19
<Page>

                                                                      APPENDIX A

                      AGREEMENT AND PLAN OF REORGANIZATION

     This Agreement and Plan of Reorganization (the "Agreement") is made as of
October 7, 2002 in Boston, Massachusetts, by and between State Street Research
Growth Trust (the "Growth Trust"), a Massachusetts business trust, on behalf of
its Large-Cap Growth Fund series (the "Acquired Fund"), and State Street
Research Securities Trust (the "Securities Trust"), a Massachusetts business
trust, on behalf of its Legacy Fund series (the "Acquiring Fund").

PLAN OF REORGANIZATION

     (a) The Acquired Fund will sell, assign, convey, transfer and deliver to
the Acquiring Fund on the Exchange Date (as defined in Section 6) all of its
properties and assets. In consideration therefor, the Acquiring Fund shall, on
the Exchange Date, assume all of the liabilities of the Acquired Fund existing
at the Valuation Time (as defined in Section 3(c)) and deliver to the Acquired
Fund (i) a number of full and fractional Class A shares of beneficial interest
of the Acquiring Fund (the "Class A Reorganization Shares") having an aggregate
net asset value equal to the value of the assets of the Acquired Fund
attributable to the Class A shares of the Acquired Fund transferred to the
Acquiring Fund on such date less the value of the liabilities of the Acquired
Fund attributable to the Class A shares of the Acquired Fund assumed by the
Acquiring Fund on that date, (ii) a number of full and fractional Class B(1)
shares of beneficial interest of the Acquiring Fund (the "Class B(1)
Reorganization Shares") having an aggregate net asset value equal to the value
of the assets of the Acquired Fund attributable to the Class B(1) shares of the
Acquired Fund transferred to the Acquiring Fund on such date less the value of
the liabilities of the Acquired Fund attributable to the Class B(1) shares of
the Acquired Fund assumed by the Acquiring Fund on that date, (iii) a number of
full and fractional Class B shares of beneficial interest of the Acquiring Fund
(the "Class B Reorganization Shares") having an aggregate net asset value equal
to the value of the assets of the Acquired Fund attributable to the Class B
shares of the Acquired Fund transferred to the Acquiring Fund on such date less
the value of the liabilities of the Acquired Fund attributable to the Class B
shares of the Acquired Fund assumed by the Acquiring Fund on that date, (iv) a
number of full and fractional Class C shares of beneficial interest of the
Acquiring Fund (the "Class C Reorganization Shares") having an aggregate net
asset value equal to the value of the assets of the Acquired Fund attributable
to the Class C shares of the Acquired Fund transferred to the Acquiring Fund on
such date less the value of the liabilities of the Acquired Fund attributable to
the Class C shares of the Acquired Fund assumed by the Acquiring Fund on that
date, and (v) a number of full and fractional Class S shares of beneficial
interest of the Acquiring Fund (the "Class S Reorganization Shares") having an
aggregate net asset value equal to the value of the assets of the Acquired Fund
attributable to the Class S shares of the Acquired Fund transferred to the
Acquiring Fund on such date less the value of the liabilities of the Acquired
Fund attributable to the Class S shares of the Acquired Fund assumed by the
Acquiring Fund on that date. (The Class A Reorganization Shares, the Class B(1)
Reorganization Shares, the Class B Reorganization Shares, the Class C
Reorganization Shares, and the Class S Reorganization Shares shall be referred
to collectively as the "Reorganization Shares"). It is intended that the
reorganization described in this Agreement shall be a reorganization within the
meaning of Section 368 of the Internal Revenue Code of 1986, as amended (the
"Code").

     (b) Upon consummation of the transaction described in paragraph (a) of this
Agreement, the Acquired Fund shall distribute in complete liquidation to its
Class A, Class B(1), Class B, Class C and Class S shareholders of record as of
the Exchange Date the Class A, Class B(1), Class B, Class C and Class S
Reorganization Shares, each such shareholder being entitled to receive that
proportion of such Class A, Class B(1), Class B, Class C and Class S
Reorganization Shares which the number of Class A, Class B(1), Class B, Class C
and Class S shares of beneficial interest of the Acquired Fund held by such

                                      A-1
<Page>

shareholder bears to the number of Class A, Class B(1), Class B, Class C and
Class S shares of the Acquired Fund outstanding on such date. Certificates
representing the Class A, Class B(1), Class B, Class C and Class S
Reorganization Shares will not be issued. All issued and outstanding Class A,
Class B(1), Class B, Class C and Class S shares of the Acquired Fund will
simultaneously be canceled on the books of the Acquired Fund.

     (c) As promptly as practicable after the liquidation of the Acquired Fund
as aforesaid, the Acquired Fund shall be liquidated pursuant to the provisions
of the Master Trust Agreement of State Street Research Growth Trust, as amended
(the "Growth Declaration of Trust"), and applicable law, and its legal
existence terminated. Any reporting responsibility of the Acquired Fund is and
shall remain the responsibility of the Acquired Fund up to and including the
Exchange Date and, if applicable, such later date on which the Acquired Fund is
liquidated.

AGREEMENT

     The Acquiring Fund and the Acquired Fund agree as follows:

     1. REPRESENTATIONS, WARRANTIES AND AGREEMENTS OF THE ACQUIRING FUND. The
Acquiring Fund represents and warrants to and agrees with the Acquired Fund
that:

     a. The Acquiring Fund is a series of the Securities Trust, a Massachusetts
business trust duly established and validly existing under the laws of The
Commonwealth of Massachusetts, and has power to own all of its properties and
assets and to carry out its obligations under this Agreement.

     b. The statement of assets and liabilities, statement of operations,
statement of changes in net assets and a schedule of investments (indicating
their market values) of the Acquiring Fund as of and for the six months ended
April 30, 2002 have been furnished to the Acquired Fund. Such statement of
assets and liabilities and schedule fairly present the financial position of the
Acquiring Fund as of that date and such statements of operations and changes in
net assets fairly reflect the results of its operations and changes in net
assets for the periods covered thereby in conformity with generally accepted
accounting principles.

     c. The current prospectus and statement of additional information of the
Acquiring Fund, each dated March 1, 2002 (collectively, as from time to time
amended, the "Acquiring Fund Prospectus"), which have previously been furnished
to the Acquired Fund, did not as of such date and does not contain as of the
date hereof, with respect to the Acquiring Fund, any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading.

     d. There are no material legal, administrative or other proceedings pending
or, to the knowledge of the Securities Trust or the Acquiring Fund, threatened
against the Securities Trust or the Acquiring Fund, which assert liability on
the part of the Acquiring Fund. The Acquiring Fund knows of no facts which might
form the basis for the institution of such proceedings and is not a party to or
subject to the provisions of any order, decree or judgment of any court or
governmental body which materially and adversely affects its business or its
ability to consummate the transactions herein contemplated.

     e. The Acquiring Fund has no known liabilities of a material nature,
contingent or otherwise, other than those shown belonging to it on its statement
of assets and liabilities as of April 30, 2002, those incurred in the ordinary
course of its business as an investment company since April 30, 2002 and those
to be assumed pursuant to this Agreement. Prior to the Exchange Date, the
Acquiring Fund will endeavor to quantify and to reflect on its balance sheet all
of its material known liabilities and will advise the

                                      A-2
<Page>

Acquired Fund of all material liabilities, contingent or otherwise, incurred by
it subsequent to September 30, 2002, whether or not incurred in the ordinary
course of business.

     f. As of the Exchange Date, the Acquiring Fund will have filed all federal
and other tax returns and reports which, to the knowledge of the Securities
Trust's officers, are required to have been filed by the Acquiring Fund, and
will have paid or will pay all federal and other taxes shown to be due on said
returns or on any assessments received by the Acquiring Fund. All tax
liabilities of the Acquiring Fund have been adequately provided for on its
books, and no tax deficiency or liability of the Acquiring Fund has been
asserted, and no question with respect thereto has been raised or is under
audit, by the Internal Revenue Service or by any state or local tax authority
for taxes in excess of those already paid.

     g. No consent, approval, authorization or order of any court or
governmental authority is required for the consummation by the Acquiring Fund of
the transactions contemplated by this Agreement, except such as may be required
under the Securities Act of 1933, as amended (the "1933 Act"), the Securities
Exchange Act of 1934, as amended (the "1934 Act"), the Investment Company Act of
1940, as amended (the "1940 Act"), and state insurance, securities or blue sky
laws (which term as used herein shall include the laws of the District of
Columbia and of Puerto Rico).

     h. The registration statement (the "Registration Statement") filed with the
Securities and Exchange Commission (the "Commission") by the Securities Trust on
Form N-14 on behalf of the Acquiring Fund and relating to the Reorganization
Shares issuable hereunder and the proxy statement of the Acquired Fund relating
to the meeting of the Acquired Fund shareholders referred to in Section 7(a) and
Section 7(b) herein (together with the documents incorporated therein by
reference, the "Proxy Statement"), on the effective date of the Registration
Statement, (i) will comply in all material respects with the provisions of the
1933 Act, the 1934 Act and the 1940 Act and the rules and regulations thereunder
and (ii) will not contain any untrue statement of a material fact or omit to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading; and at the time of the shareholders meetings
referred to in Sections 7(a) and 7(b) and on the Exchange Date, the prospectus
which is contained in the Registration Statement, as amended or supplemented by
any amendments or supplements filed with the Commission by the Securities Trust
and the Proxy Statement will not contain any untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein not misleading; provided, however, that none of the
representations and warranties in this subsection shall apply to statements in
or omissions from the Registration Statement or the Proxy Statement made in
reliance upon and in conformity with information furnished in writing by the
Acquired Fund to the Acquiring Fund specifically for use in the Registration
Statement or the Proxy Statement.

     i. There are no material contracts outstanding to which the Acquiring Fund
is a party, other than as are or will be disclosed in the Acquiring Fund
Prospectus, the Registration Statement or the Proxy Statement.

     j. The Acquiring Fund qualifies and will at all times through the Exchange
Date qualify for taxation as a "regulated investment company" under Sections 851
and 852 of the Code.

     k. The issuance of the Reorganization Shares pursuant to this Agreement
will be in compliance with all applicable federal and state securities laws.

     l. The Reorganization Shares to be issued to the Acquired Fund have been
duly authorized and, when issued and delivered pursuant to this Agreement, will
be legally and validly issued and will be fully paid and non-assessable by the
Acquiring Fund, and no shareholder of the Acquiring Fund will have any
preemptive right of subscription or purchase in respect thereof.

                                      A-3
<Page>

     m. All issued and outstanding shares of the Acquiring Fund are, and at the
Exchange Date will be, duly authorized, validly issued, fully paid and
non-assessable by the Acquiring Fund. The Acquiring Fund does not have
outstanding any options, warrants or other rights to subscribe for or purchase
any Acquiring Fund shares, nor is there outstanding any security convertible
into any Acquiring Fund shares.

     2. REPRESENTATIONS, WARRANTIES AND AGREEMENTS OF THE ACQUIRED FUND. The
Acquired Fund represents and warrants to and agrees with the Acquiring Fund
that:

     a. The Acquired Fund is a series of the Growth Trust, a Massachusetts
business trust duly established and validly existing under the laws of The
Commonwealth of Massachusetts, and has power to own all of its properties and
assets and to carry out this Agreement.

     b. A statement of assets and liabilities, statement of operations,
statement of changes in net assets and a schedule of investments (indicating
their market values) of the Acquired Fund as of and for the period ended June
30, 2002 have been furnished to the Acquiring Fund. Such statement of assets and
liabilities and schedule fairly present the financial position of the Acquired
Fund as of that date, and such statements of operations and changes in net
assets fairly reflect the results of its operations and changes in net assets
for the period covered thereby, in conformity with generally accepted accounting
principles.

     c. The current prospectus and statement of additional information of the
Acquired Fund, each dated May 1, 2002 (collectively, as from time to time
amended, the "Acquired Fund Prospectus"), which have been previously furnished
to the Acquiring Fund, did not contain as of such date and does not contain,
with respect to the Acquired Fund, any untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary to make
the statements therein not misleading.

     d. There are no material legal, administrative or other proceedings pending
or, to the knowledge of the Growth Trust or the Acquired Fund, threatened
against the Growth Trust or the Acquired Fund, which assert liability on the
part of the Acquired Fund. The Acquired Fund knows of no facts which might form
the basis for the institution of such proceedings and is not a party to or
subject to the provisions of any order, decree or judgment of any court or
governmental body which materially and adversely affects its business or its
ability to consummate the transactions herein contemplated.

     e. There are no material contracts outstanding to which the Acquired Fund
is a party, other than as are disclosed in the Growth Trust's registration
statement on Form N-lA or the Acquired Fund Prospectus.

     f. The Acquired Fund has no known liabilities of a material nature,
contingent or otherwise, other than those shown on the Acquired Fund's statement
of assets and liabilities as of June 30, 2002 referred to above and those
incurred in the ordinary course of its business as an investment company since
such date. Prior to the Exchange Date, the Acquired Fund will endeavor to
quantify and to reflect on its balance sheet all of its material known
liabilities and will advise the Acquiring Fund of all material liabilities,
contingent or otherwise, incurred by it subsequent to June 30, 2002, whether or
not incurred in the ordinary course of business.

     g. As of the Exchange Date, the Acquired Fund will have filed all federal
and other tax returns and reports which, to the knowledge of the Growth Trust's
officers, are required to have been filed by the Acquired Fund, and has paid or
will pay all federal and other taxes shown to be due on said returns or on any
assessments received by the Acquired Fund. All tax liabilities of the Acquired
Fund have been adequately provided for on its books, and no tax deficiency or
liability of the Acquired Fund has been asserted, and no question with respect
thereto has been raised or is under audit, by the Internal Revenue Service or by
any state or local tax authority for taxes in excess of those already paid.

                                      A-4
<Page>

     h. At the Exchange Date, the Growth Trust, on behalf of the Acquired Fund,
will have full right, power and authority to sell, assign, transfer and deliver
the Investments (as defined below) and any other assets and liabilities of the
Acquired Fund to be transferred to the Acquiring Fund pursuant to this
Agreement. At the Exchange Date, subject only to the delivery of the Investments
and any such other assets and liabilities as contemplated by this Agreement, the
Acquiring Fund will acquire the Investments and any such other assets and
liabilities subject to no encumbrances, liens or security interests whatsoever
and without any restrictions upon the transfer thereof, except as previously
disclosed to the Acquiring Fund. As used in this Agreement, the term
"Investments" shall mean the Acquired Fund's investments shown on the schedule
of its investments as of June 30, 2002, referred to in Section 2(b) hereof, as
supplemented with such changes in the portfolio as the Acquired Fund shall make,
and changes resulting from stock dividends, stock split-ups, mergers and similar
corporate actions through the Exchange Date.

     i. No consent, approval, authorization or order of any court or
governmental authority is required for the consummation by the Acquired Fund of
the transactions contemplated by this Agreement, except such as may be required
under the 1933 Act, the 1934 Act, the 1940 Act or state insurance, securities or
blue sky laws.

     j. The Registration Statement and the Proxy Statement, on the effective
date of the Registration Statement, (i) will comply in all material respects
with the provisions of the 1933 Act, the 1934 Act and the 1940 Act and the rules
and regulations thereunder and (ii) will not contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading; and at the time of the
shareholders meetings referred to in Section 7(a) and Section 7(b) and on the
Exchange Date, the Proxy Statement and the Registration Statement will not
contain any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statements therein not
misleading; provided, however, that none of the representations and warranties
in this subsection shall apply to statements in or omissions from the
Registration Statement or the Proxy Statement made in reliance upon and in
conformity with information furnished in writing by the Acquiring Fund to the
Acquired Fund or the Securities Trust specifically for use in the Registration
Statement or the Proxy Statement.

     k. The Acquired Fund qualifies and will at all times through the Exchange
Date qualify for taxation as a "regulated investment company" under Sections 851
and 852 of the Code.

     l. At the Exchange Date, the Acquired Fund will have sold such of its
assets, if any, as are necessary to assure that, after giving effect to the
acquisition of the assets of the Acquired Fund pursuant to this Agreement, the
Acquiring Fund will remain a "diversified company" within the meaning of Section
5(b)(1) of the 1940 Act and in compliance with such other mandatory investment
restrictions as are set forth in the Acquiring Fund Prospectus, as amended
through the Exchange Date. Notwithstanding the foregoing, nothing herein will
require the Acquired Fund to dispose of any assets if, in the reasonable
judgment of the Acquired Fund, such disposition would adversely affect the
tax-free nature of the reorganization or would violate the Acquired Fund's
fiduciary duty to its shareholders.

     m. All issued and outstanding shares of the Acquired Fund are, and at the
Exchange Date will be, duly authorized, validly issued, fully paid and
non-assessable by the Acquired Fund. The Acquired Fund does not have outstanding
any options, warrants or other rights to subscribe for or purchase any of the
Acquired Fund shares, nor is there outstanding any security convertible into any
of the Acquired Fund shares.

                                      A-5
<Page>

     3. REORGANIZATION.

     a. Subject to the requisite approval of the shareholders of the Acquired
Fund and the Acquiring Fund and to the other terms and conditions contained
herein (including the Acquired Fund's obligation to distribute to its
shareholders all of its investment company taxable income, net tax-exempt income
and net capital gain as described in Section 8(k)), the Acquired Fund agrees to
sell, assign, convey, transfer and deliver to the Acquiring Fund, and the
Acquiring Fund agrees to acquire from the Acquired Fund on the Exchange Date,
all of the Investments and all of the cash and other properties and assets of
the Acquired Fund, whether accrued or contingent (including cash received by the
Acquired Fund upon the liquidation by the Acquired Fund of any Investments), in
exchange for that number of shares of beneficial interest of the Acquiring Fund
provided for in Section 4 and the assumption by the Acquiring Fund of all of the
liabilities of the Acquired Fund, whether accrued or contingent, existing at the
Valuation Time (as defined below) except for the Acquired Fund's liabilities, if
any, arising in connection with this Agreement. Pursuant to this Agreement, the
Acquired Fund will, as soon as practicable after the Exchange Date, distribute
all of the Class A, Class B(1), Class B, Class C and Class S Reorganization
Shares received by it to the shareholders of the Acquired Fund in exchange for
their Class A, Class B(1), Class B, Class C and Class S shares, respectively, of
the Acquired Fund.

     b. The Acquired Fund will pay or cause to be paid to the Acquiring Fund any
interest, cash or such dividends, rights and other payments received by it on or
after the Exchange Date with respect to the Investments and other properties and
assets of the Acquired Fund, whether accrued or contingent, received by it on or
after the Exchange Date. Any such distribution shall be deemed included in the
assets transferred to the Acquiring Fund at the Exchange Date and shall not be
separately valued unless the securities in respect of which such distribution is
made shall have gone "ex" such distribution prior to the Valuation Time, in
which case any such distribution which remains unpaid at the Exchange Date shall
be included in the determination of the value of the assets of the Acquired Fund
acquired by the Acquiring Fund.

     c. The Valuation Time shall be the close of regular trading on the New York
Stock Exchange (generally 4:00 p.m. Eastern time) on the Exchange Date or such
earlier or later day as may be mutually agreed upon in writing by the parties
hereto (the "Valuation Time").

     4. TRANSACTION. On the Exchange Date, the Acquiring Fund will deliver to
the Acquired Fund (i) a number of full and fractional Class A Reorganization
Shares having an aggregate net asset value equal to the value of the assets of
the Acquired Fund attributable to the Class A shares of the Acquired Fund
transferred to the Acquiring Fund on such date less the value of the liabilities
of the Acquired Fund attributable to the Class A shares of the Acquired Fund
assumed by the Acquiring Fund on that date, (ii) a number of full and fractional
Class B(1) Reorganization Shares having an aggregate net asset value equal to
the value of the assets of the Acquired Fund attributable to the Class B(1)
shares of the Acquired Fund transferred to the Acquiring Fund on such date less
the value of the liabilities of the Acquired Fund attributable to the Class B(1)
shares of the Acquired Fund assumed by the Acquiring Fund on that date, (iii) a
number of full and fractional Class B Reorganization Shares having an aggregate
net asset value equal to the value of the assets of the Acquired Fund
attributable to the Class B shares of the Acquired Fund transferred to the
Acquiring Fund on such date less the value of the liabilities of the Acquired
Fund attributable to the Class B shares of the Acquired Fund assumed by the
Acquiring Fund on that date, (iv) a number of full and fractional Class C
Reorganization Shares having an aggregate net asset value equal to the value of
the assets of the Acquired Fund attributable to the Class C shares of the
Acquired Fund transferred to the Acquiring Fund on such date less the value of
the liabilities of the Acquired Fund attributable to the Class C shares of the
Acquired Fund assumed by the Acquiring Fund on that date, and (v) a number of
full and fractional Class S Reorganization Shares having an aggregate net asset
value equal to the value of the assets of the Acquired Fund attributable to the
Class S shares of the Acquired Fund transferred to the Acquiring Fund on such
date less the value of the liabilities of the Acquired Fund attributable to the
Class S shares of the Acquired Fund assumed by the Acquiring Fund on that date.

                                      A-6
<Page>

     a. The net asset value of the Class A, Class B(1), Class B, Class C and
Class S Reorganization Shares to be delivered to the Acquired Fund, the value of
the assets attributable to the Class A, Class B(1), Class B, Class C and Class S
shares of the Acquired Fund, and the value of the liabilities attributable to
the Class A, Class B(1), Class B, Class C and Class S shares of the Acquired
Fund to be assumed by the Acquiring Fund, shall in each case be determined as of
the Valuation Time.

     b. The net asset value of the Class A, Class B(1), Class B, Class C and
Class S Reorganization Shares shall be computed in the manner set forth in the
Acquiring Fund Prospectus. The value of the assets and liabilities of the Class
A, Class B(1), Class B, Class C and Class S shares of the Acquired Fund shall be
determined by the Acquiring Fund, in cooperation with the Acquired Fund,
pursuant to procedures which the Acquiring Fund would use in determining the
fair market value of the Acquiring Fund's assets and liabilities.

     c. No adjustment shall be made in the net asset value of either the
Acquired Fund or the Acquiring Fund to take into account differences in realized
and unrealized gains and losses.

     d. The Acquired Fund shall distribute the Reorganization Shares to the
shareholders of the Acquired Fund by furnishing written instructions to the
Acquiring Fund's transfer agent, which will as soon as practicable set up open
accounts for the Acquired Fund shareholders in accordance with such written
instructions.

     e. The Acquiring Fund shall assume all liabilities of the Acquired Fund,
whether accrued or contingent, in connection with the acquisition of assets and
subsequent dissolution of the Acquired Fund or otherwise, except for the
Acquired Fund's liabilities, if any, pursuant to this Agreement.

     5. EXPENSES, FEES, ETC.

     a. All fees and expenses, including legal and accounting expenses,
portfolio transfer taxes (if any) or other similar expenses incurred in
connection with the consummation by the Acquired Fund and the Acquiring Fund
of the transactions contemplated by this Agreement will be allocated ratably
between the Acquiring Fund and the Acquired Fund in proportion to their net
assets as of the Valuation Time, except that the costs of proxy materials and
proxy solicitation with respect to shareholders of the Acquired Fund will be
borne by the Acquired Fund; provided, however, that such expenses will in any
event be paid by the party directly incurring such expenses if and to the
extent that the payment by the other party of such expenses would result in
the disqualification of the Acquiring Fund or the Acquired Fund, as the case
may be, as a "regulated investment company" within the meaning of Section 851
of the Code.

     b. In the event the transactions contemplated by this Agreement are not
consummated for any reason, then each of the Acquiring Fund and the Acquired
Fund shall bear all of its own expenses incurred in connection with such
transactions.

     c. Notwithstanding any other provisions of this Agreement, if for any
reason the transactions contemplated by this Agreement are not consummated, no
party shall be liable to the other party for any damages resulting therefrom,
including without limitation consequential damages, except as specifically set
forth above.

     6. EXCHANGE DATE. Delivery of the assets of the Acquired Fund to be
transferred, assumption of the liabilities of the Acquired Fund to be assumed,
and the delivery of the Reorganization Shares to be issued shall be made at
Boston, Massachusetts, on such date as the Acquiring Fund and the Acquired

                                      A-7
<Page>

Fund shall agree upon after shareholder approval of the reorganization, the date
and time upon which such delivery is to take place being referred to herein as
the "Exchange Date."

     7. MEETINGS OF SHAREHOLDERS; DISSOLUTION.

     a. The Growth Trust, on behalf of the Acquired Fund, agrees to call a
meeting of the Acquired Fund's shareholders as soon as is practicable after the
effective date of the Registration Statement for the purpose of considering the
sale of all of its assets to and the assumption of all of its liabilities by the
Acquiring Fund as herein provided and adopting this Agreement.

     b. The Acquired Fund agrees that the liquidation and dissolution of the
Acquired Fund will be effected in the manner provided in the Growth Declaration
of Trust in accordance with applicable law and that on and after the Exchange
Date, the Acquired Fund shall not conduct any business except in connection with
its liquidation and dissolution.

     c. The Acquiring Fund has, in consultation with the Acquired Fund and based
in part on information furnished by the Acquired Fund, filed the Registration
Statement with the Commission. Each of the Acquired Fund and the Acquiring Fund
will cooperate with the other, and each will furnish to the other the
information relating to itself required by the 1933 Act, the 1934 Act and the
1940 Act and the rules and regulations thereunder to be set forth in the
Registration Statement.

     8. CONDITIONS TO THE ACQUIRING FUND'S OBLIGATIONS. The obligations of the
Acquiring Fund hereunder shall be subject to the following conditions:

     a. That this Agreement shall have been adopted and the transactions
contemplated hereby shall have been approved by the requisite votes of the
holders of the outstanding shares of beneficial interest of the Acquired Fund
and the Acquiring Fund entitled to vote.

     b. That there shall not be any material litigation pending with respect to
the matters contemplated by this Agreement.

     c. That the Acquiring Fund shall have received an opinion of Ropes & Gray,
counsel to the Acquired Fund, dated the Exchange Date and in form satisfactory
to the Acquiring Fund, to the effect that (i) the Growth Trust is a
Massachusetts business trust duly formed and is validly existing under the laws
of The Commonwealth of Massachusetts and has the power to own all its properties
and to carry on its business as presently conducted; (ii) this Agreement has
been duly authorized, executed and delivered by the Growth Trust on behalf of
the Acquired Fund and, assuming that the Registration Statement, the Acquired
Fund Prospectus and the Proxy Statement comply with the 1933 Act, the 1934 Act
and the 1940 Act and assuming due authorization, execution and delivery of this
Agreement by the Securities Trust on behalf of the Acquiring Fund, is a valid
and binding obligation of the Growth Trust and the Acquired Fund; (iii) the
Growth Trust, on behalf of the Acquired Fund, has power to sell, assign, convey,
transfer and deliver the assets contemplated hereby and, upon consummation of
the transactions contemplated hereby in accordance with the terms of this
Agreement, the Acquired Fund will have duly sold, assigned, conveyed,
transferred and delivered such assets to the Acquiring Fund; (iv) the execution
and delivery of this Agreement did not, and the consummation of the transactions
contemplated hereby will not, violate the Growth Declaration of Trust or By-Laws
of the Securities Trust or any provision of any agreement known to such counsel
to which the Growth Trust or the Acquired Fund is a party or by which it is
bound; and (v) to the knowledge of such counsel, no consent, approval,
authorization or order of any court or governmental authority is required for
the consummation by the Growth Trust on behalf of the Acquired Fund of the
transactions contemplated hereby, except such as have been obtained under the
1933 Act, the 1934 Act and the 1940 Act and such as may be required under state
securities or blue sky laws.

                                      A-8
<Page>

     d. That the Acquiring Fund shall have received an opinion of Ropes & Gray
(which opinion would be based upon certain factual representations and subject
to certain qualifications), dated the Exchange Date and in form satisfactory to
the Acquiring Fund, to the effect that, on the basis of the existing provisions
of the Code, current administrative rules, and the court decisions, for federal
income tax purposes (i) no gain or loss will be recognized by the Acquiring Fund
upon receipt of the Investments transferred to the Acquiring Fund and assumption
of liabilities pursuant to this Agreement in exchange for the Reorganization
Shares; (ii) the basis to the Acquiring Fund of the Investments will be the same
as the basis of the Investments in the hands of the Acquired Fund immediately
prior to such exchange; and (iii) the Acquiring Fund's holding periods with
respect to the Investments will include the respective periods for which the
Investments were held by the Acquired Fund.

     e. That the assets of the Acquired Fund to be acquired by the Acquiring
Fund will include no assets which the Acquiring Fund, by reason of charter
limitations or of investment restrictions disclosed in the Registration
Statement in effect on the Exchange Date, may not properly acquire.

     f. That the Registration Statement shall have become effective under the
1933 Act, and no stop order suspending such effectiveness shall have been
instituted or, to the knowledge of the Securities Trust or the Acquiring Fund,
threatened by the Commission.

     g. That the Growth Trust shall have received from the Commission, any
relevant state securities administrator and any relevant state insurance
regulatory authority such order or orders as are reasonably necessary or
desirable under the 1933 Act, the 1934 Act, the 1940 Act, and any applicable
state securities or blue sky laws or state insurance laws in connection with the
transactions contemplated hereby, and that all such orders shall be in full
force and effect.

     h. That all actions taken by the Growth Trust on behalf of the Acquired
Fund in connection with the transactions contemplated by this Agreement and all
documents incidental thereto shall be satisfactory in form and substance to the
Acquiring Fund and its counsel.

     i. That, prior to the Exchange Date, the Acquired Fund shall have declared
a dividend or dividends which, together with all previous such dividends, shall
have the effect of distributing to the shareholders of the Acquired Fund (i) all
of the excess of (x) the Acquired Fund's investment income excludable from gross
income under Section 103(a) of the Code over (y) the Acquired Fund's deductions
disallowed under Sections 265 and 171(a)(2) of the Code, (ii) all of the
Acquired Fund's investment company taxable income (as defined in Section 852 of
the Code) (computed without regard to any deduction for dividends paid) and
(iii) all of the Acquired Fund's net capital gain realized (after reduction for
any capital loss carryover), in each case for its taxable years ending on or
after December 31, 2002 and on or prior to the Exchange Date.

     j. That the Acquired Fund shall have furnished to the Acquiring Fund its
records as to the tax cost to the Acquired Fund of the securities delivered to
the Acquiring Fund pursuant to this Agreement, together with any such other
evidence as to such tax cost as the Acquiring Fund may reasonably request.

     k. That the Acquired Fund's custodian shall have delivered to the Acquiring
Fund a record identifying all of the assets of the Acquired Fund held or
maintained by such custodian as of the Valuation Time.

     l. That the Acquired Fund's transfer agent shall have provided to the
Acquiring Fund (i) the originals or true copies of all of the records of the
Acquired Fund in the possession of such transfer agent as of the Exchange Date,
(ii) its records setting forth the number of shares of the Acquired Fund

                                      A-9
<Page>

outstanding as of the Valuation Time, and (iii) the name and address of each
holder of record of any shares and the number of shares held of record by each
such shareholder.

     9. CONDITIONS TO THE ACQUIRED FUND'S OBLIGATIONS. The obligations of the
Acquired Fund hereunder shall be subject to the following conditions:

     a. That this Agreement shall have been adopted and the transactions
contemplated hereby shall have been approved by the requisite votes of the
holders of the outstanding shares of beneficial interest of the Acquired Fund
entitled to vote.

     b. That the Securities Trust, on behalf of the Acquiring Fund, shall have
accepted from the Acquired Fund a statement, dated as of the Exchange Date, of
the Acquired Fund of its liabilities which the Acquiring Fund will assume, and
that the Acquiring Fund shall have executed and delivered to the Acquired Fund
an Assumption of Liabilities, dated as of the Exchange Date, pursuant to which
it assumes all of the liabilities of the Acquired Fund existing at the Valuation
Time in connection with the transactions contemplated by this Agreement, other
than liabilities arising pursuant to this Agreement.

     c. That there shall not be any material litigation pending or threatened
with respect to the matters contemplated by this Agreement.

     d. That the Acquired Fund shall have received an opinion of Ropes & Gray,
counsel to the Acquiring Fund, in form satisfactory to counsel to the Acquired
Fund, and dated the Exchange Date, to the effect that (i) the Securities Trust
is a Massachusetts business trust duly formed and is validly existing under the
laws of The Commonwealth of Massachusetts and has the power to own all its
properties and to carry on its business as presently conducted; (ii) the
Reorganization Shares to be delivered to the Acquired Fund as provided for by
this Agreement are duly authorized and upon such delivery will be validly issued
and will be fully paid and non-assessable by the Securities Trust and the
Acquiring Fund and no shareholder of the Acquiring Fund has any preemptive right
to subscription or purchase in respect thereof; (iii) this Agreement has been
duly authorized, executed and delivered by the Securities Trust on behalf of the
Acquiring Fund and, assuming that the Acquiring Fund Prospectus, the
Registration Statement and the Proxy Statement comply with the 1933 Act, the
1934 Act and the 1940 Act and assuming due authorization, execution and delivery
of this Agreement by the Growth Trust on behalf of the Acquired Fund, is a valid
and binding obligation of the Securities Trust and the Acquiring Fund; (iv) the
execution and delivery of this Agreement did not, and the consummation of the
transactions contemplated hereby will not, violate the Master Trust Agreement of
State Street Research Securities Trust, as amended (the "Declaration of Trust")
or By-Laws of the Securities Trust, or any provision of any agreement known to
such counsel to which the Securities Trust or the Acquiring Fund is a party or
by which it is bound; (v) to the knowledge of such counsel, no consent,
approval, authorization or order of any court or governmental authority is
required for the consummation by the Securities Trust on behalf of the Acquiring
Fund of the transactions contemplated herein, except such as have been obtained
under the 1933 Act, the 1934 Act and the 1940 Act and such as may be required
under state securities or blue sky laws; and (vi) the Registration Statement has
become effective under the 1933 Act, and to best of the knowledge of such
counsel, no stop order suspending the effectiveness of the Registration
Statement has been issued and no proceedings for that purpose have been
instituted or are pending or contemplated under the 1933 Act.

     e. That the Acquired Fund shall have received an opinion of Ropes & Gray,
dated the Exchange Date (which opinion would be based upon certain factual
representations and subject to certain customary qualifications), in form
satisfactory to the Acquired Fund and its counsel, to the effect that, on the
basis of the existing provisions of the Code, current administrative rules, and
court decisions, for federal income tax purposes: (i) no gain or loss will be
recognized by the Acquired Fund as a result of the reorganization;

                                      A-10
<Page>

(ii) no gain or loss will be recognized by shareholders of the Acquired Fund on
the distribution of Reorganization Shares to them in exchange for their shares
of the Acquired Fund; (iii) the aggregate tax basis of the Reorganization Shares
that an Acquired Fund's shareholder receives in place of its Acquired Fund
shares will be the same as the basis of its Acquired Fund shares; and (iv) an
Acquired Fund's shareholder's holding period for the Reorganization Shares
received pursuant to the Agreement will be determined by including the holding
period for the Acquired Fund shares exchanged for the Reorganization Shares,
provided that the shareholder held the Acquired Fund shares as a capital asset.

     f. That all actions taken by the Securities Trust on behalf of the
Acquiring Fund in connection with the transactions contemplated by this
Agreement and all documents incidental thereto shall be satisfactory in form and
substance to the Acquired Fund and its counsel.

     g. That the Registration Statement shall have become effective under the
1933 Act, and no stop order suspending such effectiveness shall have been
instituted or, to the knowledge of the Securities Trust or the Acquiring Fund,
threatened by the Commission.

     h. That the Securities Trust shall have received from the Commission, any
relevant state securities administrator and any relevant state insurance
regulatory authority such order or orders as are reasonably necessary or
desirable under the 1933 Act, the 1934 Act, the 1940 Act, and any applicable
state securities or blue sky laws or state insurance laws in connection with the
transactions contemplated hereby, and that all such orders shall be in full
force and effect.

     10. WAIVER OF CONDITIONS. Each of the Acquired Fund or the Acquiring Fund,
after consultation with counsel, or an officer authorized by the trustees of the
Growth Trust or the Securities Trust, as the case may be, may waive any
condition to their respective obligations hereunder, except for the conditions
set forth in Sections 8(a) and 9(a).

     11. NO BROKER, ETC. Each of the Acquired Fund and the Acquiring Fund
represents that there is no person who has dealt with it or the Growth Trust or
Securities Trust who by reason of such dealings is entitled to any broker's or
finder's or other similar fee or commission arising out of the transactions
contemplated by this Agreement.

     12. TERMINATION. The Acquired Fund and the Acquiring Fund may, by consent
of the respective trustees of the Growth Trust and the Securities Trust on
behalf of their respective fund, terminate this Agreement.

     13. SOLE AGREEMENT; AMENDMENTS. This Agreement supersedes all previous
correspondence and oral communications between the parties regarding the subject
matter hereof, constitutes the only understanding with respect to such subject
matter, may not be changed except by a letter of agreement signed by each party
hereto, and shall be construed in accordance with and governed by the laws of
The Commonwealth of Massachusetts.

                                      A-11
<Page>

     14. DECLARATIONS OF TRUST. A copy of each of the Growth Declaration of
Trust and the Securities Declaration of Trust is on file with the Secretary of
State of The Commonwealth of Massachusetts, and notice is hereby given that this
instrument is executed by the undersigned officer or assistant officer of the
Acquired Fund or Acquiring Fund on behalf of the trustees of the Securities
Trust on behalf of the Acquired Fund and on behalf of the trustees of the
Securities Trust on behalf of the Acquiring Fund, in each case as officer or
assistant officer and not individually, and that the obligations of this
instrument are not binding upon any of the trustees, officers, assistant
officers, agents or shareholders of the State Street Research Growth Trust or
the State Street Research Securities Trust individually but are binding only
upon the assets and property of the Acquired Fund and the Acquiring Fund.

                                          STATE STREET RESEARCH
                                          GROWTH TRUST,

                                          on behalf of its State Street Research
                                          Large-Cap Growth Fund series

                                          By:_________________________________



                                          STATE STREET RESEARCH
                                          SECURITIES TRUST,

                                          on behalf of its State Street Research
                                          Legacy Fund series



                                          By:_________________________________


                                      A-12
<Page>

                                                                      APPENDIX B

                     FUNDAMENTAL INVESTMENT POLICIES OF THE
                  STATE STREET RESEARCH LARGE-CAP GROWTH FUND &
                      THE STATE STREET RESEARCH LEGACY FUND

INVESTMENT OBJECTIVE

LARGE-CAP GROWTH FUND

     The Fund seeks to provide long-term growth of capital.

LEGACY FUND

     The Fund seeks to provide long-term growth of capital.

DIVERSIFICATION

LARGE-CAP GROWTH FUND

     The Fund will not purchase for its portfolio (i) the securities of any
issuer if such purchase at the time thereof would cause less than seventy five
percent (75%) of the total assets of the Fund to be invested in cash and cash
items (including receivables), government securities, securities of other
investment companies, and other securities limited in respect of any one issuer
to an amount not greater in value than five percent (5%) of said total assets of
the Fund, or (ii) the securities of any one issuer if such purchase at the time
thereof would cause more than 10% of any class of securities of such issuer (as
disclosed by the last available financial statement of such issuer) to be held
by the Fund.

LEGACY FUND

     The Fund will not purchase a security of any one issuer (other than
securities issued or guaranteed as to principal or interest by the U.S.
Government or its agencies or instrumentalities or mixed-ownership Government
corporations or sponsored enterprises) if such purchase would, with respect to
75% of the Fund's total assets, cause more than 5% of the Fund's total assets to
be invested in the securities of such issuer or cause more than 10% of the
voting securities of such issuer to be held by the Fund.

SENIOR SECURITIES

LARGE-CAP GROWTH FUND

     The Fund will not issue senior securities except that this restriction
shall not apply to the establishment of multiple classes of shares of the Fund
or other issuance of any securities or related actions that may be construed to
involve senior securities otherwise permitted by law and regulatory authorities.

                                      B-1
<Page>

LEGACY FUND

     The Fund will not issue senior securities, as defined in the 1940 Act,
except as permitted by that 1940 Act and the rules thereunder or as permitted by
the Securities and Exchange Commission (the creation of general liens or
security interests under industry practices for transactions in portfolio assets
are not deemed to involve the issuance of senior securities).

UNDERWRITING

LARGE-CAP GROWTH FUND

     The Fund will not underwrite or participate in the marketing of securities
of other issuers, except the Fund may, acting alone or in syndicates or groups,
purchase or otherwise acquire securities of other issuers for investment, either
from the issuers or from persons in a control relationship with the issuers or
from underwriters of such securities.

LEGACY FUND

     The Fund will not underwrite or participate in the marketing of securities
of other issuers, except (a) the Fund may, acting alone or in syndicates or
groups, purchase or otherwise acquire securities of other issuers for
investment, either from the issuers or from persons in a control relationship
with the issuers or from underwriters of such securities, and (b) to the extent
that, in connection with the disposition of the Fund's securities, the Fund may
be a selling shareholder in an offering or deemed to be an underwriter under
certain federal securities laws.

REAL ESTATE

LARGE-CAP GROWTH FUND

     The Fund will not invest in or hold for investment any real property.

LEGACY FUND

     The Fund will not purchase fee simple interest in real estate unless
acquired as a result of ownership of securities or other instruments, although
the Fund may purchase and sell other interests in real estate including
securities which are secured by real estate, or securities of companies which
make real estate loans or own, or invest or deal in, real estate.

LENDING

LARGE-CAP GROWTH FUND

     The Fund will not lend money, except that the Fund may lend portfolio
securities and purchase bonds, debentures, notes and similar obligations (and
enter into repurchase agreements with respect thereto).

                                      B-2
<Page>

LEGACY FUND

     The Fund will not lend money; however, the Fund may lend portfolio
securities and purchase bonds, debentures, notes, bills and other debt-related
instruments or interests (and enter into repurchase agreements with respect
thereto).

COMMODITIES

LARGE-CAP GROWTH FUND

     The Fund will not invest in commodities or commodity contracts in excess of
10% of the Fund's total assets, except that investments in foreign currencies,
forward contracts, futures contracts and options on futures contracts on
securities, securities indices and foreign currencies shall not be deemed an
investment in commodities or commodities contracts.

LEGACY FUND

     The Fund will not invest in physical commodities or physical commodity
contracts or options in excess of 10% of the Fund's total assets, except that
investments in essentially financial items or arrangements such as, but not
limited to, swap arrangements, hybrids, currencies, currency and other forward
contracts, delayed delivery and when-issued contracts, futures contracts and
options on futures contracts on securities, securities indices, interest rates
and currencies shall not be deemed investments in commodities or commodities
contracts.

CONCENTRATION

LARGE-CAP GROWTH FUND

     The Fund will not make any investment which would cause more than 25% of
the Fund's total assets, taken at market value, to be invested in any one
industry.

LEGACY FUND

     The Fund will not make any investment which would cause more than 25% of
the value of the Fund's total assets to be invested in securities of issuers
principally engaged in any one industry, except securities issued or guaranteed
by the U.S. Government or its agencies or instrumentalities, as described in the
Fund's Prospectus or Statement of Additional Information as amended from time to
time.

BORROWING

LARGE-CAP GROWTH FUND

     The Fund will not borrow money, except that the Board of Trustees may
authorize the borrowing of money on an unsecured basis for the general purposes
of the Fund and may authorize the issue therefor of notes or debentures, but no
money shall be borrowed for the Fund

                                      B-3
<Page>

except pursuant to the authority of the Board of Trustees, and no borrowings for
the Fund shall be authorized to an aggregate amount greater than 10% of the net
assets of the Fund.

LEGACY FUND

     The Fund will not borrow money, including reverse repurchase agreements
insofar as such agreements may be regarded as borrowings, except for borrowings
not in an amount in excess of 33 1/3% of the value of its total assets.

MARGIN

LARGE-CAP GROWTH FUND

     The Fund will not purchase securities on margin or make a short sale of any
securities.

LEGACY FUND

     N/A

NEW COMPANIES

LARGE-CAP GROWTH FUND

     The Fund will not purchase for its portfolio securities of companies which
have a record of less than three (3) years' continuous operation if such
purchase at the time thereof would cause more than 5% of the total assets of the
Fund to be invested in the securities of such company or companies; such period
of three years may include the operation of any predecessor company or
companies, partnership or individual enterprise, if the company whose securities
are taken as an investment for funds of the Fund, has come into existence as a
result of a merger, consolidation, reorganization, or the purchase of
substantially all the assets of such predecessor company or companies,
partnership or individual enterprise.

LEGACY FUND

     N/A

OFFICERS, TRUSTEES AND DIRECTORS

LARGE-CAP GROWTH FUND

     The Fund will not purchase for, or retain in, its portfolio any securities
issued by an issuer any of whose officers, directors or security holders is an
Officer, Trustee or Director of the Trust or of the investment adviser of the
Fund if, to the knowledge of the Trust, one or more of the Officers, Trustees or
Directors of the Trust or of its investment adviser own beneficially more than
one-half of one percent (0.5%) of the shares or securities or both (taken at
market value) of such issuer and all such Officers and Directors owning more
than one-half of one percent (0.5%)

                                      B-4
<Page>

of such shares or securities together own beneficially more than five percent
(5%) of such shares or securities or both (taken at market value); and if the
Secretary of the Trust shall have requested all Officers, Trustees and Directors
of the Trust and of its investment adviser to notify the Trust at least quarter
annually as to their ownership interest in the securities held by the Fund, then
the Fund shall not be charged with knowledge of any such ownership interest in
the absence of receiving such notice.

LEGACY FUND

     N/A



                                      B-5
<Page>

                              [FRONT OF PROXY CARD]

                  VOTE BY TELEPHONE, ON THE INTERNET OR BY MAIL

     Vote this proxy card TODAY! Your prompt response will save your Fund the
expense of additional mailings.

Option 1: Automated Touch Tone Voting: Call toll-free [_____________]
Option 2: Over the Internet at www.ssrfunds.com
Option 3: Return this proxy card using the enclosed envelope

     Joint Special Meeting of Shareholders - February   , 2003 *** CONTROL
NUMBER:***

           [arrow] Please detach at perforation before mailing [arrow]

                   STATE STREET RESEARCH LARGE-CAP GROWTH FUND
                 a series of State Street Research Growth Trust

     The undersigned hereby appoints Richard S. Davis, Francis J. McNamara, III,
Terrence J. Cullen and Amy L. Simmons, and each of them, as proxies with full
power of substitution to each to act for and vote on behalf of the undersigned
all shares of the above fund, which the undersigned would be entitled to vote if
personally present at the Joint Special Meeting of the Shareholders to be held
at the principal offices of the Fund, One Financial Center, 31st Floor, Boston,
Massachusetts 02111, at 4:00 P.M. on February   , 2003, or at any adjournments
thereof, on the items described on the other side of this form, as set forth in
the Notice of Joint Special Meeting of Shareholders and the accompanying
Prospectus/Proxy Statement dated January [__], 2003, receipt of which is
acknowledged by the undersigned. PLEASE INDICATE ANY CHANGE OF ADDRESS BELOW.
This proxy may be revoked at any time prior to the exercise of the powers
conferred thereby. THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES.

        IF NOT VOTING BY PHONE OR THE INTERNET, IT IS IMPORTANT THAT THIS
             PROXY BE SIGNED AND RETURNED IN THE ENCLOSED ENVELOPE.

DATE:____________________________

NOTE: Please date and sign exactly as name or names appear hereon and return in
the enclosed envelope, which requires no postage. When signing as attorney,
executor, trustee, guardian or officer of a corporation, please give title as
such.

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

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

(Signatures) if held jointly (Title(s), if required)

                            CONTINUED ON REVERSE SIDE

<Page>

- --------------------------------------------------------------------------------
PLEASE DETACH AND RETURN BOTTOM PORTION IN THE ENCLOSED ENVELOPE
- --------------------------------------------------------------------------------
If a choice is specified for a proposal, this proxy will be voted as indicated.
IF NO CHOICE IS SPECIFIED FOR A PROPOSAL, THIS PROXY WILL BE VOTED FOR THE
PROPOSAL. In their discretion the proxies are authorized to vote upon such other
business as may properly come before the Meeting. The Board of Trustees
unanimously recommends a vote FOR the proposal.

1.  To approve or disapprove an Agreement and Plan of Reorganization
    providing for the acquisition of all of the assets and liabilities of
    the State Street Research Large-Cap Growth Fund, a series of State
    Street Research Growth Trust, by the State Street Research
    Legacy Fund, a series of the State Street Research Securities
    Trust.

                             FOR [ ]  AGAINST [ ]  ABSTAIN [ ]


                           PLEASE SIGN ON REVERSE SIDE

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                                Proxy Voting Form
                       State Street Research Growth Trust:
                   State Street Research Large-Cap Growth Fund

THE BOARD OF TRUSTEES RECOMMENDS A VOTE "FOR" THE PROPOSAL.

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Proposal     1. To approve or disapprove an Agreement and Plan of
             Reorganization providing for the acquisition of all
             of the assets and liabilities of the State Street
             Research Large-Cap Growth Fund, a series of the State
             Street Research Growth Trust, by the State Street
             Research Legacy Fund, a series of the State
             Street Research Securities Trust.

                        FOR [ ]  AGAINST [ ]  ABSTAIN [ ]


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<Page>

                     STATE STREET RESEARCH SECURITIES TRUST

                                    FORM N-14

                                     PART B

                       STATEMENT OF ADDITIONAL INFORMATION

                                JANUARY ___, 2003

     This Statement of Additional Information (the "SAI") relates to the
proposed reorganization (the "Reorganization") of the State Street Research
Large-Cap Growth Fund (the "Large-Cap Growth Fund"), a series of State Street
Research Growth Trust, a Massachusetts business trust, into the State Street
Research Legacy Fund (the "Legacy Fund"), a series of State Street Research
Securities Trust, a Massachusetts business trust.

     This SAI contains information which may be of interest to shareholders
relating to the Reorganization, but which is not included in the
Prospectus/Proxy Statement dated January ___, 2003 (the "Prospectus/Proxy
Statement") of the Legacy Fund. As described in the Prospectus/Proxy Statement,
the Reorganization would involve the transfer of substantially all the assets
of, and the assumption of substantially all the liabilities of, the Large-Cap
Growth Fund, in exchange for shares of the Legacy Fund. The Large-Cap Growth
Fund would distribute the Legacy Fund shares it receives to its shareholders in
complete liquidation of the Large-Cap Growth Fund.

     This SAI is not a prospectus, and should be read in conjunction with the
Prospectus/Proxy Statement. The Prospectus/Proxy Statement has been filed with
the Securities and Exchange Commission, and is available upon request and
without charge by writing to State Street Research Securities Trust, One
Financial Center, Boston, MA 02111, or by calling 1-877-773-8637.

                                TABLE OF CONTENTS
<Table>
                                                                                                        
I.   Additional Information about the Legacy Fund and the Large-Cap Growth Fund.                            B-2
II.  Financial Statements                                                                                   B-2
</Table>

<Page>

I. ADDITIONAL INFORMATION ABOUT THE LEGACY FUND AND THE LARGE-CAP GROWTH FUND.

     FOR THE LEGACY FUND: Incorporated by reference to Statement of Additional
Information for the Legacy Fund dated March 1, 2002, as filed with the
Securities and Exchange Commission.

     FOR THE LARGE-CAP GROWTH FUND: Incorporated by reference to Statement of
Additional Information for the Large-Cap Growth Fund dated May 1, 2002, as filed
with the Securities and Exchange Commission.

II. FINANCIAL STATEMENTS.

     This SAI incorporates by reference (i) the Annual Report of the Legacy Fund
for the year ended October 31, 2002, (ii) the Semiannual Report of the Legacy
Fund for the six months ended April 30, 2002, (iii) the Annual Report of the
Large-Cap Growth Fund for the year ended December 31, 2001, and (iv) the
Semiannual Report of the Large-Cap Growth Fund for the six months ended June 30,
2002. Each of these reports contains historical financial information regarding
the Funds and have been filed with the Securities and Exchange Commission. The
financial statements therein, and, in the case of the Annual Reports, the report
of independent accountants therein, are incorporated herein by reference.

     Pro forma financial statements of the Legacy Fund are provided on the
following pages.
<Page>

                        STATE STREET RESEARCH LEGACY FUND
                  PRO FORMA COMBINING PORTFOLIO OF INVESTMENTS
                               SEPTEMBER 30, 2002
                                   (UNAUDITED)

<Table>
<Caption>
                                            SHARES                                 VALUE
                            -------------------------------------  -------------------------------------
                                           LARGE-CAP    PRO-FORMA                 LARGE-CAP    PRO-FORMA
                              LEGACY        GROWTH       COMBINED    LEGACY        GROWTH      COMBINED
                            -----------  -----------  -----------  -----------  -----------  -----------
                                                                           
COMMON STOCKS 98.6%

CONSUMER DISCRETIONARY 18.2%

ADVERTISING AGENCIES 0.6%
    Omnicom Group Inc.                0       33,100       33,100  $         0  $ 1,843,008  $ 1,843,008
                                                                   -----------  -----------  -----------
CASINOS/GAMBLING,
HOTEL/MOTEL 0.8%
    International Game
        Technology Inc.*              0       39,000       39,000            0    2,696,460    2,696,460
                                                                   -----------  -----------  -----------
COMMERCIAL SERVICES 0.3%
    Cendant Corp.*                    0       77,000       77,000            0      828,520      828,520
                                                                   -----------  -----------  -----------
COMMUNICATIONS,
MEDIA &
ENTERTAINMENT 2.8%
    Viacom Inc. Cl. B*          222,981            0      222,981    9,041,879            0    9,041,879
                                                                   -----------  -----------  -----------
CONSUMER PRODUCTS 0.5%
    Avon Products Inc.                0       31,000       31,000            0    1,429,100    1,429,100
                                                                   -----------  -----------  -----------
RESTAURANTS 0.6%
    Darden Restaurants Inc.           0       75,000       75,000            0    1,818,000    1,818,000
                                                                   -----------  -----------  -----------
RETAIL 12.6%
    Home Depot Inc.             326,450       56,300      382,750    8,520,345    1,469,430    9,989,775
    Kohl's Corp.*               128,400            0      128,400    7,808,004            0    7,808,004
    Target Corp.                249,400      146,890      396,290    7,362,288    4,336,193   11,698,481
    USA Interactive*            117,200      200,000      317,200    2,271,336    3,876,000    6,147,336
    Wal-Mart Stores Inc.              0       91,500       91,500            0    4,505,460    4,505,460
                                                                   -----------  -----------  -----------
                                                                    25,961,973   14,187,083   40,149,056
                                                                   -----------  -----------  -----------
Total Consumer Discretionary                                        35,003,852   22,802,171   57,806,023
                                                                   -----------  -----------  -----------
CONSUMER STAPLES 11.2%

BEVERAGES 3.5%
    Coca-Cola Co.                     0       43,200       43,200            0    2,071,872    2,071,872
    PepsiCo Inc.                180,000       68,940      248,940    6,651,000    2,547,333    9,198,333
                                                                   -----------  -----------  -----------
                                                                     6,651,000    4,619,205   11,270,205
                                                                   -----------  -----------  -----------
FOODS 3.6%
    Kraft Foods Inc. Cl. A      242,300       67,500      309,800    8,834,258    2,461,050   11,295,308
                                                                   -----------  -----------  -----------
HOUSEHOLD PRODUCTS 4.1%
    Procter & Gamble Co.        112,000       35,000      147,000   10,010,560    3,128,300   13,138,860
                                                                   -----------  -----------  -----------
    Total Consumer Staples                                          25,495,818   10,208,555   35,704,373
                                                                   -----------  -----------  -----------
</Table>

    The accompanying notes are an integral part of the financial statements.

                                       1
<Page>

State Street Research Legacy Fund --
Pro Forma Combining Portfolio of Investments
continued


<Table>
<Caption>
                                            SHARES                                 VALUE
                            -------------------------------------  -------------------------------------
                                           LARGE-CAP    PRO-FORMA                 LARGE-CAP    PRO-FORMA
                              LEGACY        GROWTH       COMBINED    LEGACY        GROWTH      COMBINED
                            -----------  -----------  -----------  -----------  -----------  -----------
                                                                           
FINANCIAL SERVICES 16.0%

BANKS & SAVINGS & LOAN 2.0%
    Bank of New York Co., Inc.  218,700            0      218,700   $6,285,438   $        0   $6,285,438
                                                                   -----------  -----------  -----------
INSURANCE 4.5%
    ACE Ltd.                    307,400      180,440      487,840    9,102,114    5,342,828   14,444,942
                                                                   -----------  -----------  -----------
MISCELLANEOUS FINANCIAL 9.5%
    American Express Co.        318,500            0      318,500    9,930,830            0    9,930,830
    Citigroup, Inc.             338,966       50,330      389,296   10,050,342    1,492,285   11,542,627
    Federal National
        Mortgage Association    127,500            0      127,500    7,591,350            0    7,591,350
    MBNA Corp.                        0       53,600       53,600            0      985,168      985,168
                                                                   -----------  -----------  -----------
                                                                    27,572,522    2,477,453   30,049,975
                                                                   -----------  -----------  -----------
    Total Financial Services                                        42,960,074    7,820,281   50,780,355
                                                                   -----------  -----------  -----------
HEALTHCARE 22.5%

DRUGS & BIOTECHNOLOGY 17.0%
    Amgen Inc.*                 210,200       62,490      272,690    8,765,340    2,605,833   11,371,173
    Baxter International
        Inc.                          0       60,760       60,760            0    1,856,218    1,856,218
    Biogen Inc.*                      0       53,200       53,200            0    1,557,164    1,557,164
    CV Therapeutics Inc.*             0       53,200       53,200            0    1,112,412    1,112,412
    Johnson & Johnson           155,500       21,000      176,500    8,409,440    1,135,680    9,545,120
    Neurocrine
        Biosciences Inc.*             0       63,700       63,700            0    2,611,700    2,611,700
    Pfizer Inc.                 301,200      148,270      449,470    8,740,824    4,302,796   13,043,620
    Pharmacia Corp.             238,600       95,880      334,480    9,276,768    3,727,814   13,004,582
                                                                   -----------  -----------  -----------
                                                                    35,192,372   18,909,617   54,101,989
                                                                   -----------  -----------  -----------
HEALTHCARE FACILITIES 0.4%
    HCA Inc.                          0       24,000       24,000            0    1,142,640    1,142,640
                                                                   -----------  -----------  -----------
HOSPITAL SUPPLY 5.1%
    St. Jude Medical Inc.*      300,000       92,000      392,000   10,710,000    3,284,400   13,994,400
    Varian Medical
        Systems Inc.*            31,000       20,000       51,000    1,332,690      859,800    2,192,490
                                                                   -----------  -----------  -----------
                                                                    12,042,690    4,144,200   16,186,890
                                                                   -----------  -----------  -----------
    Total Healthcare                                                47,235,062   24,196,457   71,431,519
                                                                   -----------  -----------  -----------
INTEGRATED OILS 4.2%

INTEGRATED INTERNATIONAL 4.2%
    Total Fina SA               201,500            0      201,500   13,268,775            0   13,268,775
                                                                   -----------  -----------  -----------
    Total Integrated Oils                                           13,268,775            0   13,268,775
                                                                   -----------  -----------  -----------
</Table>

    The accompanying notes are an integral part of the financial statements.


                                       2
<Page>

State Street Research Legacy Fund --
Pro Forma Combining Portfolio of Investments
continued

<Table>
<Caption>
                                                        SHARES                                 VALUE
                                        -------------------------------------  -------------------------------------
                                                       LARGE-CAP    PRO-FORMA                 LARGE-CAP    PRO-FORMA
                                          LEGACY        GROWTH       COMBINED    LEGACY        GROWTH      COMBINED
                                        -----------  -----------  -----------  -----------  -----------  -----------
                                                                                       
MATERIALS & PROCESSING 3.3%

CHEMICALS 3.3%
    Air Products & Chemicals Inc.           252,000            0      252,000  $10,586,520  $         0  $10,586,520
                                                                               -----------  -----------  -----------
    Total Materials & Processing                                                10,586,520            0   10,586,520
                                                                               -----------  -----------  -----------
OTHER 4.1%

MULTI-SECTOR 4.1%
    General Electric Co.                    378,900      155,710      534,610    9,339,885    3,838,252   13,178,137
                                                                               -----------  -----------  -----------
    Total Other                                                                  9,339,885    3,838,252   13,178,137
                                                                               -----------  -----------  -----------
OTHER ENERGY 2.6%

OIL & GAS PRODUCERS 2.6%
   Ocean Energy Inc.                        218,000      195,470      413,470    4,349,100    3,899,626    8,248,726
                                                                               -----------  -----------  -----------
    Total Other Energy                                                           4,349,100    3,899,626    8,248,726
                                                                               -----------  -----------  -----------

PRODUCER DURABLES 2.2%

MISCELLANEOUS
EQUIPMENT 2.2%
    Danaher Corp.                           124,100            0      124,100    7,055,085            0    7,055,085
                                                                               -----------  -----------  -----------
    Total Producer Durables                                                      7,055,085            0    7,055,085
                                                                               -----------  -----------  -----------

TECHNOLOGY 13.1%

COMMUNICATIONS
TECHNOLOGY 2.2%
    Cisco Systems Inc.*                     468,600      200,580      669,180    4,910,928    2,102,078    7,013,006
                                                                               -----------  -----------  -----------
COMPUTER SOFTWARE 5.0%
    Mercury Interactive Corp.*                    0       77,600       77,600            0    1,331,616    1,331,616
    Microsoft Corp.*                        216,800      116,240      333,040    9,471,992    5,078,525   14,550,517
                                                                               -----------  -----------  -----------
                                                                                 9,471,992    6,410,141   15,882,133
                                                                               -----------  -----------  -----------
COMPUTER TECHNOLOGY 1.9%
    Dell Computer Corp.*                          0       56,000       56,000            0    1,316,560    1,316,560
    IBM Computer Corp.*                      78,300            0       78,300    4,571,937            0    4,571,937
                                                                               -----------  -----------  -----------
                                                                                 4,571,937    1,316,560    5,888,497
                                                                               -----------  -----------  -----------
ELECTRONICS 0.1%
    Kopin Corp.*                                  0      136,120       136,120           0      473,698      473,698
                                                                               -----------  -----------  -----------
ELECTRONICS:SEMICONDUCTORS/COMPONENTS 3.9%
    Analog Devices Inc.*                    208,400      121,030       329,430   4,105,480    2,384,291    6,489,771
    Intel Corp.                                   0      216,110       216,110           0    3,001,768    3,001,768
    Intersil Holding Corp. Cl. A*                 0      110,000       110,000           0    1,425,600    1,425,600
    Micron Technology Inc.*                       0      110,900       110,900           0    1,371,833    1,371,833
                                                                               -----------  -----------  -----------
                                                                                 4,105,480    8,183,492   12,288,972
                                                                               -----------  -----------  -----------
    Total Technology                                                            23,060,337   18,485,969   41,546,306
                                                                               -----------  -----------  -----------
</Table>

    The accompanying notes are an integral part of the financial statements.


                                       3
<Page>

State Street Research Legacy Fund --
Pro Forma Combining Portfolio of Investments
continued

<Table>
<Caption>
                                                  SHARES                                 VALUE
                                  -------------------------------------   -------------------------------------------
                                                 LARGE-CAP    PRO-FORMA                 LARGE-CAP        PRO-FORMA
                                    LEGACY        GROWTH       COMBINED    LEGACY        GROWTH           COMBINED
                                  -----------  -----------  -----------   -----------  -----------    ----------------
                                                                                    

UTILITIES 1.2%
TELECOMMUNICATIONS 1.2%
    SBC Communications
        Inc.                        188,900            0       188,900    $  3,796,891    $         0    $  3,796,891
                                                                          ------------    -----------    ------------
    Total Utilities                                                          3,796,891              0       3,796,891
                                                                          ------------    -----------    ------------
    Total Common Stocks
    (Cost $266,569,253, $102,287,406 and $368,856,659)                     222,151,399     91,251,311     313,402,710
                                                                          ------------    -----------    ------------

<Caption>
                                              PRINCIPLE AMOUNT
                                --------------------------------------
                                                                                      
COMMERCIAL PAPER 2.1%

American Express
    Credit Corp.
    1.74%, 10/01/2002            $        0   $2,353,000    $2,353,000    $          0    $ 2,353,000    $  2,353,000
American Express
    Credit Corp.
    1.74%, 10/04/2002             1,000,000            0     1,000,000         999,854              0         999,854
Caterpillar Financial
    Services NV
    1.72%, 10/09/2002                     0      960,000       960,000               0        959,633         959,633
General Electric
    Capital Corp.
    1.75%, 10/01/2002               479,000            0       479,000         479,000              0         479,000
General Electric
    Capital Corp.
    1.74%, 10/10/2002             1,015,000            0     1,015,000       1,014,559              0       1,014,559
Merrill
    Lynch & Co.
    1.70%, 10/01/2002             1,000,000            0     1,000,000       1,000,000              0       1,000,000
                                                                          ------------    -----------    ------------
Total Commercial Paper (Cost $3,493,413, $3,312,633 and $6,806,046)          3,493,413      3,312,633       6,806,046
                                                                          ------------    -----------    ------------
Total Investments (Cost $270,062,666, $105,600,039 and $375,662,705)       225,644,812     94,563,944     320,208,756
Other Assets, Less Liabilities                                              (1,078,371)    (1,142,386)     (2,220,757)
                                                                          ------------    -----------    ------------
Net Assets                                                                $224,566,441    $93,421,558    $317,987,999
                                                                          ============    ===========    ============
</Table>

- ----------------------
*   Non-income producing securities

    The accompanying notes are an integral part of the financial statements.

                                       4

<Page>

                        STATE STREET RESEARCH LEGACY FUND
             PRO FORMA COMBINING STATEMENT OF ASSETS AND LIABILITIES
                               SEPTEMBER 30, 2002
                                   (UNAUDITED)
<Table>
<Caption>
                                                                                 LARGE-CAP         PRO FORMA
                                                               LEGACY             GROWTH           COMBINED
                                                            ------------       ------------      -------------
                                                                                        
ASSETS
Investments, at value
   (Cost $270,062,666, $105,600,039 and $375,662,705)       $225,644,812       $ 94,563,944      $ 320,208,756
Dividends receivable                                             212,828             90,950            303,778
Receivable for fund shares sold                                  109,896            175,433            285,329
Other assets                                                     112,326             16,319            128,645
                                                            ------------       ------------      -------------
   TOTAL ASSETS                                              226,079,862         94,846,646        320,926,508

LIABILITIES
Payable for securities purchased                                       -             81,073             81,073
Payable for fund shares redeemed                                 672,898          1,008,960          1,681,858
Accrued transfer agent and shareholder services                  298,297            123,713            422,010
Accrued management fee                                           125,368             35,278            160,646
Accrued distribution and service fees                            144,176             23,999            168,175
Accrued trustees' fees                                            19,699             11,145             30,844
Accrued administration fee                                        15,278             19,746             35,024
Other accrued expenses                                           237,705            121,174            358,879
                                                            ------------       ------------      -------------
   TOTAL LIABILITIES                                           1,513,421          1,425,088          2,938,509
                                                            ------------       ------------      -------------
NET ASSETS                                                  $224,566,441       $ 93,421,558      $ 317,987,999
                                                            ============       ============      =============

Net Assets consist of:
   Unrealized depreciation of investments                   $(44,417,854)      $(11,036,095)     $ (55,453,949)
   Accumulated net realized loss                             (87,321,380)       (57,649,308)      (144,970,688)
   Paid-in capital                                           356,305,675        162,106,961        518,412,636
                                                            ------------       ------------      -------------
                                                            $224,566,441       $ 93,421,558      $ 317,987,999
                                                            ============       ============      =============

Net Asset Value and redemption price per share of
   Class A shares ($72,474,909 DIVIDED BY 7,953,145,
   $17,396,208 DIVIDED BY 4,822,992 and $89,871,117
   DIVIDED BY 9,862,718)                                    $       9.11       $       3.61      $        9.11
                                                            ============       ============      =============
Maximum Offering Price per share of Class A shares
   ($9.11 DIVIDED BY 0.9425, $3.61 DIVIDED BY 0.9425
    and $9.11 DIVIDED BY 0.9425)                            $       9.67       $       3.83      $        9.67
                                                            ============       ============      =============

Net Asset Value and offering
   price per share of Class B(1) shares*
   ($84,737,416 DIVIDED BY 9,632,634, $10,554,445
   DIVIDED BY 3,207,773 and $95,291,861 DIVIDED BY
   10,832,003)                                              $       8.80       $       3.29      $        8.80
                                                            ============       ============      =============

Net Asset Value and offering
   price per share of Class B shares*
   ($36,288,123 DIVIDED BY 4,083,755, $12,425,880
   DIVIDED BY 3,779,060 and $48,714,003 DIVIDED BY
   5,481,492)                                               $       8.89       $       3.29      $        8.89
                                                            ============       ============      =============

Net Asset Value and offering
   price per share of Class C shares*
   ($27,235,212 DIVIDED BY 3,094,958, $2,006,620
   DIVIDED BY 610,061 and $29,241,832 DIVIDED BY
   3,322,983)                                               $       8.80       $       3.29      $        8.80
                                                            ============       ============      =============

Net Asset Value, offering price and redemption price
   per share of Class S shares ($3,830,781 DIVIDED BY
   412,851, $51,038,405 DIVIDED BY 13,789,205 and
   $54,869,186 DIVIDED BY 5,912,679)                        $       9.28       $       3.70      $        9.28
                                                            ============       ============      =============
</Table>
- ---------------------
*    Redemption price per share for Class B(1), Class B and Class C is equal to
     net asset value less any applicable contingent deferred sales charge.


    The accompanying notes are an integral part of the financial statements.

                                       5
<Page>

                        STATE STREET RESEARCH LEGACY FUND
                   PRO FORMA COMBINING STATEMENT OF OPERATIONS
                      FOR THE YEAR ENDED SEPTEMBER 30, 2002
                                   (UNAUDITED)
<Table>
<Caption>
                                                                LARGE-CAP       PRO FORMA          PRO FORMA
                                              LEGACY             GROWTH        ADJUSTMENTS         COMBINED
                                           ------------         ---------    -------------        ------------
                                                                                     
INVESTMENT INCOME
Dividends, net of foreign taxes            $  3,344,801         $ 945,719                         $  4,290,520
Interest                                        108,283           173,898                              282,181
                                           ------------         ---------    -------------        ------------
                                              3,453,084         1,119,617                            4,572,701
EXPENSES
Management fee                                2,093,247           664,676          244,881(1)        3,002,804
Transfer agent and shareholder services       1,147,291           406,247                            1,553,538
Custodian fee                                   118,373           103,423          (89,430)(1)         132,366
Registration fees                                82,292            66,836          (66,836)(1)          82,292
Administration fee                               88,823            95,117          (83,823)(1)         100,117
Reports to shareholders                         269,896           134,400         (114,400)(1)         289,896
Audit fee                                        29,232            32,719          (29,232)(1)          32,719
Trustees' fees                                   22,758             9,395           (9,395)(1)          22,758
Legal fees                                        5,985             1,410                                7,395
Distribution and service fees - Class A         296,152            70,124                              366,276
Distribution and service fees - Class B(1)    1,212,309           143,330                            1,355,639
Distribution and service fees - Class B         397,496           209,659                              607,155
Distribution and service fees - Class C         410,663            27,004                              437,667
Amortization of organization costs                7,357                 -                                7,357
Miscellaneous                                    38,158            11,700          (11,700)(1)          38,158
                                           ------------         ---------    -------------        ------------
                                              6,220,032         1,976,040         (159,935)          8,036,137
Fees paid indirectly                            (39,544)          (21,991)                             (61,535)
                                           ------------         ---------    -------------        ------------
                                              6,180,488         1,954,049         (159,935)          7,974,602
                                           ------------         ---------    -------------        ------------
Net investment loss                          (2,727,404)         (834,432)         159,935          (3,401,901)
                                           ------------         ---------    -------------        ------------
Net realized loss on investments            (52,237,519)      (32,502,632)                         (84,740,151)
Net unrealized appreciation
   of investments                             2,237,832         1,353,906                            3,591,738
                                           ------------         ---------    -------------        ------------
Net loss on investments                     (49,999,687)      (31,148,726)                         (81,148,413)
                                           ------------         ---------    -------------        ------------
Net decrease in net assets
   resulting from operations               $(52,727,091)     $(31,983,158)   $     159,935        $(84,550,314)
                                           ============      ============    =============        ============
</Table>

- ----------------
(1) Adjustments reflect expected savings when the funds combine.

    The accompanying notes are an integral part of the financial statements.

                                       6
<Page>

                        STATE STREET RESEARCH LEGACY FUND
                         NOTES TO PRO FORMA STATEMENTS
                      FOR THE YEAR ENDED SEPTEMBER 30, 2002
                                   (UNAUDITED)

     1. BASIS OF COMBINATION

        The unaudited Pro Forma Combining Portfolio of Investments, the Pro
Forma Combining Statement of Assets and Liabilities and the Pro Forma Combining
Statement of Operations reflect the accounts of State Street Research Legacy
Fund ("Legacy") and State Street Research Large-Cap Growth Fund ("Large-Cap
Growth") (collectively, the "Funds" or a "Fund") at and for the year ended
September 30, 2002.

        The pro forma statements give effect to the proposed transfer of the
assets and stated liabilities of Large-Cap Growth to Legacy in exchange for
shares of Legacy under generally accepted accounting principles. However, it is
possible that Large-Cap Growth will not approve the merger.

        The historical cost of investment securities will be carried forward to
the surviving entity and the results of operations of Legacy for pre-combination
periods will not be restated. The pro forma statements do not reflect the
expenses of each fund in carrying out its obligations under the Agreement and
Plan of Reorganization and Liquidation, which will be allocated to each Fund on
the basis of identifiable direct costs or otherwise on the basis of relative net
assets.

        The Pro Forma Combining Portfolio of Investments, the Pro Forma
Combining Statement of Assets and Liabilities and the Pro Forma Combining
Statement of Operations should be read in conjunction with the historical
financial statements of the funds included or incorporated by reference in the
Statement of Additional Information.

     2. PORTFOLIO VALUATION

        The fund values all portfolio securities as of the date of this report
(or, if that day wasn't a business day, then the most recent business day). The
fund uses the following methods for determining the values of various types of
securities:

     -    LISTED SECURITIES - The fund uses the price of the last sale on a
          national securities exchange that was quoted before the close of the
          New York Stock Exchange.

     -    OVER-THE-COUNTER SECURITIES - The fund uses the closing prices quoted
          on the Nasdaq system. If a security hasn't traded that day, or if it
          is not quoted on the Nasdaq system, the value is set at halfway
          between the closing bid and asked quotations.

     -    SECURITIES MATURING WITHIN SIXTY DAYS - The fund adjusts the value of
          these securities daily, moving them closer to the amount due on
          maturity as the maturity date approaches.

     3. CAPITAL SHARES

        The pro forma net asset value per share assumes the issuance of
additional shares of Legacy which would have been issued at September 30, 2002
in connection with the proposed reorganization. The pro forma number of shares
outstanding of 9,862,718, 10,832,003, 5,481,492, 3,322,983 and 5,912,679 in each
of Class A, Class B(1), Class B, Class C and Class S shares, respectively,
includes 1,909,573, 1,199,369, 1,397,737, 228,025, and 5,499,828 additional
shares from each of Class A, Class B(1), Class B, Class C and Class S shares,
respectively, all of which are assumed to be issued in the reorganization at
September 30, 2002.

     4. Certain costs incurred in the organization and registration of the
Legacy Fund were capitalized and are being amortized under the straight-line
method over a period of five years.

     5. MISCELLANEOUS EXPENSES

        Miscellaneous expenses consist primarily of certain insurance costs and
travel reimbursements to Trustees.

    The accompanying notes are an integral part of the financial statements.


                                       7
<Page>

                     STATE STREET RESEARCH SECURITIES TRUST

                                    FORM N-14

                                     PART C

                                OTHER INFORMATION

ITEM 15. INDEMNIFICATION

     Under Article VI of the Registrant's Master Trust Agreement as further
amended (the "Master Trust Agreement") each of the Registrant's Trustees and
officers (including persons serving in such capacity with another entity at the
request of the Registrant) ("Covered Person") shall be indemnified against all
liabilities, including but not limited to, amounts paid in satisfaction of
judgments, in compromises or as fines and penalties, and expenses, including
reasonable accountants' and counsel fees, incurred by any Covered Person in
connection with the defense or disposition of any action, suit or other
proceeding, whether civil or criminal, before any court or administrative or
legislative body, in which such Covered Person may be or may have been involved
as a party or otherwise or with which such person may be or may have been
threatened, while in office or thereafter, by reason of being or having been
such a Covered Person, except with respect to any matter as to which it has been
determined that such Covered Person had acted with willful misfeasance, bad
faith, gross negligence or reckless disregard of the duties involved in the
conduct of such Covered Person's office (such conduct being referred to
hereafter as "Disabling Conduct"). A determination that the Covered Person is
entitled to indemnification may be made by (i) a final decision on the merits by
a court or other body before which the proceeding was brought that the person to
be indemnified was not liable by reason of Disabling Conduct, (ii) dismissal of
a court action or an administrative proceeding against a Covered Person for
insufficiency of evidence of Disabling Conduct, or (iii) a reasonable
determination, based upon a review of the facts, that the indemnitee was not
liable by reason of Disabling Conduct by (a) a vote of a majority of a quorum of
Trustees who are neither "interested persons" of the Registrant as defined in
section 2(a)(19) of the Investment Company Act of 1940 nor parties to the
proceeding, or (b) an independent legal counsel in a written opinion.

     Under the Distribution Agreement between the Registrant and State Street
Research Investment Services, Inc., the Registrant's distributor, the Registrant
has agreed to indemnify and hold harmless State Street Research Investment
Services, Inc. and each person who has been, is, or may hereafter be an officer,
director, employee or agent of State Street Research Investment Services, Inc.
against any loss, damage or expense reasonably incurred by any of them in
connection with any claim or in connection with any action, suit or proceeding
to which any of them may be a party, which arises out of or is alleged to arise
out of or is based upon a violation of any of its covenants herein contained or
any untrue or alleged untrue statement of material fact, or the omission or
alleged omission to state a material fact necessary to make the statements made
not misleading, in a Registration Statement or Prospectus of the Registrant, or
any amendment or supplement thereto, unless such statement or omission was made
in reliance upon written information furnished by State Street Research
Investment Services, Inc.

<Page>

     Insofar as indemnification by the Registrant for liabilities arising under
the Securities Act of 1933 may be permitted to trustees, officers, underwriters
and controlling persons of the Registrant, pursuant to Article VI of the Master
Trust Agreement, or otherwise, the Registrant has been advised that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Act and is, therefore, unenforceable.
In the event that a claim for indemnification against such liabilities (other
than the payment by the Registrant of expenses incurred or paid by a trustee,
officer or controlling person of the Registrant in the successful defense of any
action, suit or proceeding) is asserted against the Registrant by such trustee,
officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question of whether such indemnification by it is against
public policy as expressed in the Act and will be governed by the final
adjudication of such issue.

ITEM 16. EXHIBITS

     (1)(a)   Master Trust Agreement and Amendment No. 1 to Master Trust
              Agreement (4)

     (1)(b)   Amendment No. 2 to Master Trust Agreement (5)

     (1)(c)   Amendment No. 3 to Master Trust Agreement (7)

     (1)(d)   Amendment No. 4 to Master Trust Agreement (7)

     (1)(e)   Amendment No. 5 to Master Trust Agreement (8)

     (1)(f)   Amendment No. 6 to Master Trust Agreement (9)

     (1)(g)   Amendment No. 7 to Master Trust Agreement (11)

     (2)(a)   By-Laws of the Registrant (1)*

     (2)(b)   Amendment No. 1 to By-Laws effective August 2, 2000 (11)

     (3)      Not applicable

     (4)      Copies of the agreement of reorganization and any amendments to
              it - filed as Appendix A to Part A hereof

     (5)      See Master Trust Agreement and By-Laws of the Registrant, with
              amendments, included as Exhibits above

     (6)(a)   Advisory Agreement with State Street Research & Management
              Company (4)

     (6)(b)   Letter Agreement with respect to the Advisory Agreement relating
              to State Street Research Strategic Income Fund (6)

<Page>

     (6)(c)   Letter Agreement with respect to the Advisory Agreement relating
              to State Street Research Legacy Fund (7)

     (7)(a)   Distribution Agreement with State Street Research Investment
              Services, Inc. (4)

     (7)(b)   Form of Selected Dealer Agreement (13)

     (7)(c)   Form of Bank and Bank-Affiliated Broker-Dealer Agreement (2)*

     (7)(d)   Letter Agreement with respect to the Distribution Agreement
              relating to State Street Research Strategic Income Fund (6)

     (7)(e)   Letter Agreement with respect to the Distribution Agreement
              relating to State Street Research Legacy Fund (7)

     (8)      Not applicable

     (9)(a)   Custodian Contract with State Street Bank and Trust Company (4)

     (9)(b)   Letter Agreement with respect to the Custodian Contract relating
              to State Street Research Strategic Income Fund (6)

     (9)(c)   Letter Agreement with respect to the Custodian Contract relating
              to State Street Research Legacy Fund (7)

     (9)(d)   Data Access Services Addendum to Custodian Contract (8)

     (9)(e)   Amendment to the Custodian Contract with State Street Bank and
              Trust Company dated November 17, 2000 (10)

     (10)(a)  Plan of Distribution Pursuant to Rule 12b-1 (3)

     (10)(b)  Letter Agreement with respect to the Plan of Distribution Pursuant
              to Rule 12b-1 relating to State Street Research Strategic Income
              Fund (6)

     (10)(c)  Letter Agreement with respect to the Plan of Distribution Pursuant
              to Rule 12b-1 relating to State Street Research Legacy Fund (7)

     (10)(d)  Rule 12b-1 Plan for Class B(1) Shares (9)

     (10)(e)  Rule 12b-1 Plan dated October 18, 2000 (11)

     (10)(f)  First Amended and Restated Multiple Class Expense Allocation
              Plan (4)

     (10)(g)  Addendum to First Amended and Restated Multiple Class Expense
              Allocation Plan (8)

     (11)     Opinion and Consent of Ropes & Gray - filed herewith

<Page>

     (12)     Opinion of Ropes & Gray as to tax matters - to be filed by
              post-effective amendment

     (13)     Not applicable

     (14)     Consent of PricewaterhouseCoopers LLP - filed herewith

     (15)     Not applicable

     (16)(a)  Powers of Attorney (12)

     (16)(b)  Certificate of Board Resolution Respecting Powers of Attorney (12)

     (17)(a)  Code of Ethics (revised May 1, 2002) (12)

     (17)(b)  State Street Research Legacy Fund Annual Report to Shareholders -
              to be filed by amendment

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

* Restated in electronic format in Post-Effective Amendment No. 7, filed on
  August 29, 1997.

Filed as part of the Registration Statement as noted below and incorporated
herein by reference:
<Table>
<Caption>
        FOOTNOTE          SECURITIES ACT OF 1993
       REFERENCE          REGISTRATION/AMENDMENT                                DATE FILED
       ---------          ----------------------                                ----------
                                                                          
           1              Initial Registration                                  January 31, 1994
           2              Pre-Effective Amendment No. 1                         November 19, 1994
           3              Post-Effective Amendment No. 2                        August 25, 1995
           4              Post-Effective Amendment No. 3                        June 4, 1996
           5              Post-Effective Amendment No. 5                        August 29, 1996
           6              Post-Effective Amendment No. 6                        January 23, 1997
           7              Post-Effective Amendment No. 10                       June 30, 1998
           8              Post-Effective Amendment No. 11                       August 31, 1999
           9              Post-Effective Amendment No. 12                       August 3, 2000
           10             Post-Effective Amendment No. 14                       February 27, 2001
           11             Post-Effective Amendment No. 15                       June 28, 2001
           12             Post-Effective Amendment No. 18                       June 26, 2002
           13             Post-Effective Amendment No. 19                       August 29, 2002
</Table>

<Page>

ITEM 17.  UNDERTAKINGS

(1)  The undersigned Registrant agrees that prior to any public reoffering of
     the securities registered through the use of a prospectus which is a part
     of this Registration Statement by any person or party who is deemed to be
     an underwriter within the meaning of Rule 145(c) of the Securities Act [17
     CFR 230.145c], the reoffering prospectus will contain the information
     called for by the applicable registration form for reofferings by persons
     who may be deemed underwriters, in addition to the information called for
     by the other items of the applicable form.

(2)  The undersigned Registrant agrees that every prospectus that is filed under
     paragraph (1) above will be filed as a part of an amendment to the
     registration statement and will not be used until the amendment is
     effective, and that, in determining any liability under the Securities Act
     of 1933, each post-effective amendment shall be deemed to be a new
     registration statement for the securities offered therein, and the offering
     of the securities at that time shall be deemed to be the initial bona fide
     offering of them.

(3)  The Registrant agrees to file, by post-effective amendment, an opinion of
     counsel or a copy of an Internal Revenue Service ruling supporting the tax
     consequences of the proposed mergers described in this Registration
     Statement within a reasonable time after receipt of such opinion or ruling.

<Page>

                                   SIGNATURES

As required by the Securities Act of 1933, this Registration Statement has been
signed on behalf of the Registrant, in the City of Boston and The Commonwealth
of Massachusetts, on the 20th day of November, 2002.

                                   STATE STREET RESEARCH SECURITIES TRUST

                                   By: __________________*_________________
                                       Richard S. Davis, Chief Executive Officer


As required by the Securities Act of 1933, this Registration Statement has been
signed by the following persons in the capacities indicated.

Signature:                                  Title:

_______*___________                 Chairman of the Board,
Richard S. Davis                    President, and Chief
                                    Executive Officer (Principal
                                    Executive Officer)

_______*___________                 Treasurer (Principal
Douglas A. Romich                   Accounting and Financial
                                    Officer)

_______*___________                 Trustee
Bruce R. Bond

_______*___________                 Trustee
Steve A. Garban

_______*___________                 Trustee
Dean O. Morton

_______*___________                 Trustee
Susan M. Phillips

_______*___________                 Trustee
Toby Rosenblatt

_______*___________                 Trustee
Michael S. Scott Morton

_______*___________                 Trustee
James M. Storey

         *By:  /s/ Francis J. McNamara, III
              ______________________________
               Francis J. McNamara, III,
               Attorney-in-Fact under Powers of
               Attorney incorporated by reference from
               Post-Effective Amendment No. 18 filed
               June 26, 2002.