GLENBROOK LIFE & ANNUITY CO SEPARATE ACCOUNT A
497, 2000-05-12
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<PAGE>

                    THE AIM LIFETIME PLUSSM VARIABLE ANNUITY

Glenbrook Life and Annuity Company                  Prospectus dated May 1, 2000
P.O. Box 94039, Palatine, IL 60094-4039
Telephone Number: 1-800-776-6976

Glenbrook Life and Annuity Company ("Glenbrook") is offering the AIM Lifetime
PlusSM Variable Annuity, an individual and group flexible premium deferred
variable annuity contract ("Contract"). This prospectus contains information
about the Contract that you should know before investing. Please keep it for
future reference.

The Contract currently offers 18 investment alternatives ("investment
alternatives"). The Investment Alternatives include a fixed account option
("Fixed Account") and 17 variable sub-accounts ("Variable Sub-Accounts") of the
Glenbrook Life and Annuity Company Separate Account A ("Variable Account").
Each Variable Sub-Account invests exclusively in shares of one of the following
funds ("Funds") of AIM Variable Insurance Funds:

  . AIM V.I. Aggressive Growth Fund       . AIM V.I. Government Securities
  . AIM V.I. Balanced Fund                  Fund
  . AIM V.I. Blue Chip Fund               . AIM V.I. Growth Fund
  . AIM V.I. Capital Appreciation Fund    . AIM V.I. Growth and Income Fund
  . AIM V.I. Capital Development Fund     . AIM V.I. High Yield Fund
  . AIM V.I. Dent Demographic Trends Fund . AIM V.I. International Equity Fund
  . AIM V.I. Diversified Income Fund      . AIM V.I. Money Market Fund
  . AIM V.I. Global Growth and Income Fund. AIM V.I. Telecommunications and
  . AIM V.I. Global Utilities Fund          Technology Fund*
                                          . AIM V.I. Value Fund

*Effective May 1, 2000, the Fund changed its name from AIM V.I.
Telecommunications Fund to AIM V.I. Telecommunications and Technology Fund to
reflect changes in its investment policies. We have made a corresponding change
in the name of the Variable Sub-Account that invests in that Fund.

We (Glenbrook) have filed a Statement of Additional Information, dated May 1,
2000, with the Securities and Exchange Commission ("SEC"). It contains more
information about the Contract and is incorporated herein by reference, which
means it is legally a part of this prospectus. Its table of contents appears on
page C-1 of this prospectus. For a free copy, please write or call us at the
address or telephone number above, or go to the SEC's Web site
(http://www.sec.gov). You can find other information and documents about us,
including documents that are legally part of this prospectus, at the SEC's Web
site.

                  The Securities and Exchange Commission has not approved or
                  disapproved the securities described in this prospectus, nor
                  has it passed on the accuracy or the adequacy of this
                  prospectus. Anyone who tells you otherwise is committing a
                  federal crime.

  IMPORTANT
   NOTICES

                  The Contracts may be distributed through broker-dealers that
                  have relationships with banks or other financial
                  institutions or by employees of such banks. However, the
                  Contracts are not deposits, or obligations of, or guaranteed
                  by such institutions or any federal regulatory agency.
                  Investment in the Contracts involves investment risks,
                  including possible loss of principal.

                  The Contracts are not FDIC insured.

                                       1
<PAGE>

TABLE OF CONTENTS
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                            Page
                                                                            ----
            <S>                                                             <C>
            Important Terms................................................   3
            The Contract At A Glance.......................................   4
            How the Contract Works.........................................   6
            Expense Table..................................................   7
            Financial Information..........................................  10

   Overview

            The Contract...................................................  11
            Purchases......................................................  13
            Contract Value.................................................  14
            Investment Alternatives........................................  15
              The Variable Sub-Accounts....................................  15
              The Fixed Account............................................  16
              Transfers....................................................  19
            Expenses.......................................................  21
            Access To Your Money...........................................  24
            Income Payments................................................  26
            Death Benefits.................................................  29

   Contract
   Features

            More Information:..............................................  31
              Glenbrook....................................................  31
              The Variable Account.........................................  31
              The Funds....................................................  32
              The Contract.................................................  32
              Qualified Plans..............................................  33
              Legal Matters................................................  33
              Year 2000....................................................  34
            Taxes..........................................................  35
            Annual Reports and Other Documents.............................  39
            Performance Information........................................  40
            Experts........................................................  41
            Appendix A--Accumulation Unit Values........................... A-1
            Appendix B--Market Value Adjustment............................ B-1
            Statement of Additional Information Table of Contents.......... C-1
</TABLE>

    Other
 Information

                                       2
<PAGE>

IMPORTANT TERMS
- --------------------------------------------------------------------------------

This prospectus uses a number of important terms that you may not be familiar
with. The index below identifies the page that describes each term. The first
use of each term in this prospectus appears in highlights.

<TABLE>
<CAPTION>
                                                                           Page
                                                                          ------
   <S>                                                                    <C>
   Accumulation Phase....................................................      6
   Accumulation Unit..................................................... 10, 14
   Accumulation Unit Value............................................... 10, 14
   Annuitant.............................................................     11
   Automatic Additions Program...........................................     13
   Automatic Fund Rebalancing Program....................................     20
   Beneficiary...........................................................     11
   Cancellation Period...................................................      4
   *Contract.............................................................  6, 11
   Contract Anniversary..................................................      5
   Contract Owner ("You")................................................      6
   Contract Value........................................................     14
   Contract Year.........................................................      4
   Death Benefit Anniversary.............................................     29
   Dollar Cost Averaging Program.........................................     20
   Due Proof of Death....................................................     29
   Enhanced Death Benefit Options........................................     29
   Fixed Account.........................................................     16
   Free Withdrawal Amount................................................     22
   Funds.................................................................     15
   Glenbrook ("We")......................................................  1, 31
   Guarantee Periods.....................................................     16
   Income Plan...........................................................  6, 26
   Investment Alternatives...............................................      1
   Issue Date............................................................      6
   Market Value Adjustment...............................................     18
   Payout Phase..........................................................      6
   Payout Start Date.....................................................     26
   Qualified Contracts...................................................      4
   Right to Cancel.......................................................     13
   SEC...................................................................      1
   Settlement Value......................................................     29
   Systematic Withdrawal Program.........................................     24
   Treasury Rate.........................................................     18
   Valuation Date........................................................     13
   Variable Account......................................................  1, 31
   Variable Sub-Account..................................................  1, 15
</TABLE>
- ----------------

   *If you purchase a group Contract, we will issue you a certificate that
   represents your ownership and that summarizes the provisions of the group
   Contract. References to "Contract" in the prospectus include certificates,
   unless the context requires otherwise. In certain states the Contract is
   available only as a group contract.


                                       3
<PAGE>

THE CONTRACT AT A GLANCE
- --------------------------------------------------------------------------------

The following is a snapshot of the Contract. Please read the remainder of this
prospectus for more information.


 Flexible Payments           You can purchase a Contract with as little as
                             $5,000 ($2,000 for "Qualified Contracts," which
                             are Contracts issued with qualified plans). You
                             can add to your Contract as often and as much
                             as you like, but each payment must be at least
                             $500 ($100 for automatic purchase payments to
                             the variable investment options). You must
                             maintain a minimum account size of $1,000.

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

 Right to Cancel             You may cancel your Contract within 20 days of
                             receipt or any longer period as your state may
                             require ("Cancellation Period"). Upon
                             cancellation, we will return your purchase
                             payments adjusted, to the extent federal or
                             state law permits, to reflect the investment
                             experience of any amounts allocated to the
                             Variable Account.

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

 Expenses                    You will bear the following expenses:

                                . Total Variable Account annual fees equal to
                                  1.45%
                                  of average daily net assets
                                . Annual contract maintenance charge of $35
                                  (with certain exceptions)
                                . Withdrawal charges ranging from 0% to 6% of
                                  payments withdrawn (with certain
                                  exceptions)
                                . Transfer fee of $10 after 12th transfer in
                                  any Contract Year (fee currently waived)
                                . State premium tax (if your state imposes
                                  one)

                             In addition, each Fund pays expenses that you
                             will bear indirectly if you invest in a
                             Variable Sub-Account.

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

 Investment Alternatives     The Contract offers 18 investment alternatives
                             including:
                                . The Fixed Account (which credits interest
                                  at rates we guarantee), and
                                . 17 Variable Sub-Accounts investing in Funds
                                  offering professional
                                . money management by A I M Advisors, Inc.

                             To find out current rates being paid on the
                             Fixed Account, or to find out how the Variable
                             Sub-Accounts have performed, please call us at
                             1-800-776-6978.

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

 Special Services            For your convenience, we offer these special
                             services:
                                . Automatic Fund Rebalancing Program
                                . Automatic Additions Program
                                . Dollar Cost Averaging Program
                                . Systematic Withdrawal Program


                                       4
<PAGE>


 Income Payments             You can choose fixed income payments, variable
                             income payments, or a combination of the two.
                             You can receive your income payments in one of
                             the following ways:
                                . life income with guaranteed payments
                                . a joint and survivor life income with
                                  guaranteed payments
                                . guaranteed payments for a specified period
                                  (5 to 30 years)

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

 Death Benefits              If you die before the Payout Start Date, we
                             will pay the death benefit described in the
                             Contract. We also offer 2 Enhanced Death
                             Benefit Options.

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

 Transfers                   Before the Payout Start Date, you may transfer
                             your Contract value ("Contract Value") among
                             the investment alternatives, with certain
                             restrictions. Transfers to the Fixed Account
                             must be at least $500.

                             We do not currently impose a fee upon
                             transfers. However, we reserve the right to
                             charge $10 per transfer after the 12th transfer
                             in each "Contract Year," which we measure from
                             the date we issue your Contract or a Contract
                             anniversary ("Contract Anniversary").

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

 Withdrawals                 You may withdraw some or all of your Contract
                             Value at any time during the Accumulation
                             Phase. Full or partial withdrawals are
                             available under limited circumstances on or
                             after the Payout Start Date.

                             In general, you must withdraw at least $50 at a
                             time. ($1,000 for withdrawals made during the
                             Payout Phase.) A 10% federal tax penalty may
                             apply if you withdraw before you are 59 1/2
                             years old. A withdrawal charge and Market Value
                             Adjustment also may apply. Full or partial
                             withdrawals are available under limited
                             circumstances on or after the Payout Start
                             Date.


                                       5
<PAGE>

HOW THE CONTRACT WORKS
- --------------------------------------------------------------------------------

The Contract basically works in two ways.

First, the Contract can help you (we assume you are the Contract owner) save
for retirement because you can invest in up to 18 Investment Alternatives and
pay no federal income taxes on any earnings until you withdraw them. You do
this during what we call the "Accumulation Phase" of the Contract. The
Accumulation Phase begins on the date we issue your Contract (we call that date
the "Issue Date") and continues until the Payout Start Date, which is the date
we apply your money to provide income payments. During the Accumulation Phase,
you may allocate your purchase payments to any combination of the Variable Sub-
Accounts and/or the Fixed Account. If you invest in the Fixed Account, you will
earn a fixed rate of interest that we declare periodically. If you invest in
any of the Variable Sub-Accounts, your investment return will vary up or down
depending on the performance of the corresponding Funds.

Second, the Contract can help you plan for retirement because you can use it to
receive retirement income for life and/or for a pre-set number of years, by
selecting one of the income payment options (we call these "Income Plans")
described on page 26. You receive income payments during what we call the
"Payout Phase" of the Contract, which begins on the Payout Start Date and
continues until we make the last payment required by the Income Plan you
select. During the Payout Phase, if you select a fixed income payment option,
we guarantee the amount of your payments, which will remain fixed. If you
select a variable income payment option, based on one or more of the Variable
Sub-Accounts, the amount of your payments will vary up or down depending on the
performance of the corresponding Funds. The amount of money you accumulate
under your Contract during the Accumulation Phase and apply to an Income Plan
will determine the amount of your income payments during the Payout Phase.

        The timeline below illustrates how you might use your Contract.

                                [TIMELINE LOGO]

As the Contract owner you exercise all of the rights and privileges provided by
the Contract. If you die, any surviving Contract owner or, if none, the
Beneficiary will exercise the rights and privileges provided by the Contract.
See "The Contract." In addition, if you die before the Payout Start Date, we
will pay a death benefit to any surviving Contract owner, or, if there is none,
your Beneficiary. See "Death Benefits."

Please call us at 1-800-776-6978 if you have any questions about how the
Contract works.

                                       6
<PAGE>

EXPENSE TABLE
- --------------------------------------------------------------------------------

The table below lists the expenses that you will bear directly or indirectly
when you buy a Contract. The table and the examples that follow do not reflect
premium taxes that may be imposed by the state where you reside. For more
information about Variable Account expenses, see "Expenses," below. For more
information about Fund expenses, please refer to the accompanying prospectus
for the Funds.

CONTRACT OWNER TRANSACTION EXPENSES

Withdrawal Charge (as a percentage of purchase payments)*

Number of Complete Years Since We Received the Purchase

<TABLE>
   <S>                       <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>
   Payment Being Withdrawn:    0    1    2    3    4    5    6    7+
   Applicable Charge:          6%   6%   5%   5%   4%   4%   3%   0%
</TABLE>

<TABLE>
   <S>                                                                 <C>
   Annual Contract Maintenance Charge.................................  $35.00**
   Transfer Fee....................................................... $10.00***
</TABLE>
- ----------------

   * Each Contract Year, you may withdraw up to 10% of your aggregate purchase
   payments without incurring a withdrawal charge or a Market Value Adjustment.

  ** We will waive this charge in certain cases. See "Expenses."

 *** Applies solely to the thirteenth and subsequent transfers within a
   Contract Year. We are currently waiving the transfer fee.

VARIABLE ACCOUNT ANNUAL EXPENSES

(as a percentage of average daily net asset value deducted from each Variable
Sub-Account)

<TABLE>
   <S>                                                                     <C>
   Mortality and Expense Risk Charge...................................... 1.35%
   Administrative Expense Charge.......................................... 0.10%
   Total Variable Account Annual Expenses................................. 1.45%
</TABLE>

                                       7
<PAGE>

                              FUND ANNUAL EXPENSES
                (After Voluntary Reductions and Reimbursements)
             (as a percentage of Fund average daily net assets)(1)

<TABLE>
<CAPTION>
                                                                   Total Annual
                                               Management  Other       Fund
Fund                                              Fee     Expenses   Expenses
- ----                                           ---------- -------- ------------
<S>                                            <C>        <C>      <C>
AIM V.I. Aggressive Growth Fund (2)...........   0.00%     1.19%      1.19%
AIM V.I. Balanced Fund (2)....................   0.65%     0.56%      1.21%
AIM V.I. Blue Chip Fund.......................   0.75%     0.55%      1.30%
AIM V.I. Capital Appreciation Fund............   0.62%     0.11%      0.73%
AIM V.I. Capital Development Fund (2).........   0.00%     1.23%      1.23%
AIM V.I. Dent Demographic Trends Fund.........   0.85%     0.55%      1.40%
AIM V.I. Diversified Income Fund..............   0.60%     0.23%      0.83%
AIM V.I. Global Growth and Income Fund (2)....   0.97%     0.37%      1.34%
AIM V.I. Global Utilities Fund................   0.65%     0.49%      1.14%
AIM V.I. Government Securities Fund...........   0.50%     0.40%      0.90%
AIM V.I. Growth Fund..........................   0.63%     0.10%      0.73%
AIM V.I. Growth and Income Fund...............   0.61%     0.16%      0.77%
AIM V.I. High Yield Fund (2)..................   0.35%     0.79%      1.14%
AIM V.I. International Equity Fund............   0.75%     0.22%      0.97%
AIM V.I. Money Market Fund....................   0.40%     0.20%      0.60%
AIM V.I. Telecommunications and Technology
 Fund.........................................   1.00%     0.27%      1.27%
AIM V.I. Value Fund...........................   0.61%     0.15%      0.76%
</TABLE>
- ----------------

(1) Figures shown in the table are for the year ended December 31, 1999, except
    for the AIM V.I. Blue Chip, Dent Demographic Trends, Global Growth and
    Income, and Telecommunications and Technology Funds which commenced
    operations on December 29, 1999, December 29, 1999, October 15, 1999 and
    October 15, 1999 respectively. For these Funds, the management fee, other
    expenses and total annual fund operating expenses are based on estimates
    for the Funds' first full fiscal year.

(2) Absent voluntary reductions and reimbursements for certain Funds,
    management fees, other expenses, and total annual fund expenses expressed
    as a percentage of average net assets of the Funds would have been as
    follows:

<TABLE>
<CAPTION>
                                                                    Total Annual
                                                Management  Other       Fund
      Fund                                         Fee     Expenses   Expenses
      ----                                      ---------- -------- ------------
      <S>                                       <C>        <C>      <C>
      AIM V.I. Aggressive Growth Fund..........   0.80%     1.62%      2.42%
      AIM V.I. Balanced Fund...................   0.75%     0.56%      1.31%
      AIM V.I. Capital Development Fund........   0.75%     2.67%      3.42%
      AIM V.I. Global Growth and Income Fund...   1.00%     0.37%      1.37%
      AIM V.I. High Yield Fund.................   0.63%     0.79%      1.42%
</TABLE>

EXAMPLE 1

The example below shows the dollar amount of expenses that you would bear
directly or indirectly if you:

  . invested $1,000 in a Variable Sub-Account,

  . earned a 5% annual return on your investment, and

  . surrendered your Contract, or you began receiving income payments for a
    specified period of less than 120 months, at the end of each time period.

The example does not include any taxes or tax penalties you may be required to
pay if you surrender your Contract.


                                       8
<PAGE>

<TABLE>
<CAPTION>
SUB-ACCOUNT                                      1 YEAR 3 YEARS 5 YEARS 10 YEARS
- -----------                                      ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
AIM V.I. Aggressive Growth......................  $ 94   $167    $241     $421
AIM V.I. Balanced...............................  $ 83   $133    $187     $317
AIM V.I. Blue Chip..............................  $ 83   $133    $186     $316
AIM V.I. Capital Appreciation...................  $ 77   $116    $157     $259
AIM V.I. Capital Development....................  $105   $196    $288     $504
AIM V.I. Dent Demographic Trends................  $ 84   $136    $191     $326
AIM V.I. Diversified Income.....................  $ 78   $119    $162     $269
AIM V.I. Global Growth and Income...............  $ 84   $138    $194     $331
AIM V.I. Global Utilities.......................  $ 81   $128    $178     $301
AIM V.I. Government Securities..................  $ 79   $121    $166     $276
AIM V.I. Growth.................................  $ 77   $116    $157     $259
AIM V.I. Growth and Income......................  $ 77   $117    $159     $263
AIM V.I. High Yield.............................  $ 84   $137    $192     $328
AIM V.I. International Equity...................  $ 79   $123    $169     $283
AIM V.I. Money Market...........................  $ 76   $112    $150     $245
AIM V.I. Telecommunications and Technology......  $ 84   $137    $193     $330
AIM V.I. Value..................................  $ 77   $117    $158     $262
</TABLE>

EXAMPLE 2

Same assumptions as Example 1 above, except that you decided not to surrender
your Contract, or you began receiving income payments (for at least 120 months
if under an Income Plan with a specified period), at the end of each period.

<TABLE>
<CAPTION>
SUB-ACCOUNT                                      1 YEAR 3 YEARS 5 YEARS 10 YEARS
- -----------                                      ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
AIM V.I. Aggressive Growth......................  $40    $122    $205     $421
AIM V.I. Balanced...............................  $29    $ 88    $151     $317
AIM V.I. Blue Chip..............................  $29    $ 88    $150     $316
AIM V.I. Capital Appreciation...................  $23    $ 71    $121     $259
AIM V.I. Capital Development....................  $51    $151    $252     $504
AIM V.I. Dent Demographic Trends................  $30    $ 91    $155     $326
AIM V.I. Diversified Income.....................  $24    $ 74    $126     $269
AIM V.I. Global Growth and Income...............  $30    $ 93    $158     $331
AIM V.I. Global Utilities.......................  $27    $ 83    $142     $301
AIM V.I. Government Securities..................  $25    $ 76    $130     $276
AIM V.I. Growth.................................  $23    $ 71    $121     $259
AIM V.I. Growth and Income......................  $23    $ 71    $121     $259
AIM V.I. High Yield.............................  $30    $ 92    $156     $328
AIM V.I. International Equity...................  $25    $ 78    $133     $283
AIM V.I. Money Market...........................  $22    $ 67    $114     $245
AIM V.I. Telecommunications and Technology......  $30    $ 92    $157     $330
AIM V.I. Value..................................  $23    $ 72    $122     $262
</TABLE>

Please remember that you are looking at examples and not a representation of
past or future expenses. The examples assume that any Fund expense waivers or
reimbursement arrangements described in the footnotes on page 8 as in effect
for the time periods presumed above. Your actual expenses may be lower or
greater than those shown above. Similarly, your rate of return may be lower or
greater than 5%, which is not guaranteed. To reflect the contract maintenance
charge in the examples, we estimated an equivalent percentage charge, based on
an assumed average Contract size of $57,476.

                                       9
<PAGE>

FINANCIAL INFORMATION
- --------------------------------------------------------------------------------

To measure the value of your investment in the Variable Sub-Accounts during the
Accumulation Phase, we use a unit of measure we call the "Accumulation Unit."
Each Variable Sub-Account has a separate value for its Accumulation Units we
call "Accumulation Unit Value." Accumulation Unit Value is analogous to, but
not the same as, the share price of a mutual fund.

Attached as Appendix A to this prospectus are tables showing the Accumulation
Unit Values of each Variable Sub-Account since its inception. To obtain a
fuller picture of each Variable Sub-Account's finances, please refer to the
Variable Account's financial statements contained in the Statement of
Additional Information. The financial statements of Glenbrook also appear in
the Statement of Additional Information.

                                       10
<PAGE>

THE CONTRACT
- --------------------------------------------------------------------------------

CONTRACT OWNER

The AIM Lifetime Plus(sm) Variable Annuity is a contract between you, the
Contract owner, and Glenbrook, a life insurance company. As the Contract owner,
you may exercise all of the rights and privileges provided to you by the
Contract. That means it is up to you to select or change (to the extent
permitted):

  . the Investment Alternatives during the Accumulation and Payout Phases,

  . the amount and timing of your purchase payments and withdrawals,

  . the programs you want to use to invest or withdraw money,

  . the income payment plan you want to use to receive retirement income,

  . the Annuitant (either yourself or someone else) on whose life the income
    payments will be based,

  . the Beneficiary or Beneficiaries who will receive the benefits that the
    Contract provides when the last surviving Contract owner dies and

  . any other rights that the Contract provides.

If you die, any surviving Contract owner, or, if none, the Beneficiary, may
exercise the rights and privileges provided by the Contract.

The Contract cannot be jointly owned by both a non-natural person and a natural
person. At issue, the maximum age of Contract owner, joint Contract owner, or
Annuitant if the owner is a non-natural person cannot exceed age 90.

You can use the Contract with or without a qualified plan. A qualified plan is
a personal retirement savings plan, such as an IRA or tax-sheltered annuity,
that meets the requirements of the Internal Revenue Code. Qualified plans may
limit or modify your rights and privileges under the Contract. We use the term
"Qualified Contract" to refer to a Contract issued with a qualified plan. See
"Qualified Plans" on page 33.

ANNUITANT

The Annuitant is the individual whose age determines the latest Payout Start
Date and whose life determines the amount and duration of income payments
(other than under Income Plans with guaranteed payments for a specified
period). You initially designate an Annuitant in your application. If the
Contract owner is a natural person, you may change the Annuitant prior to the
Payout Start Date. In our discretion, we may permit you to designate a joint
Annuitant, who is a second person on whose life income payments depend, on or
after the Payout Start Date.

If the Annuitant dies prior to the Payout Start Date, the new Annuitant will
be:

  . the youngest Contract owner, otherwise

  . the youngest Beneficiary.

BENEFICIARY

The Beneficiary is the person who may elect to receive the death benefit or
become the new Contract owner if the sole surviving Contract owner dies before
the Payout Start Date. If the sole surviving Contract owner dies after the
Payout Start Date, the Beneficiary will receive any guaranteed income payments
scheduled to continue.

You may name one or more Beneficiaries when you apply for a Contract. You may
change or add Beneficiaries at any time by writing to us, unless you have
designated an irrevocable Beneficiary. We will provide a change

                                       11
<PAGE>

of Beneficiary form to be signed and filed with us. Any change will be
effective at the time you sign the written notice, whether or not the Annuitant
is living when we receive the notice. Until we receive your written notice to
change a Beneficiary, we are entitled to rely on the most recent Beneficiary
information in our files. We will not be liable as to any payment or settlement
made prior to receiving the written notice. Accordingly, if you wish to change
your Beneficiary, you should deliver your written notice to us promptly.

If you did not name a Beneficiary or if the named Beneficiary is no longer
living and there are no other surviving Beneficiaries, the new Beneficiary will
be:

  . your spouse or, if he or she is no longer alive,

  . your surviving children equally, or if you have no surviving children,

  . your estate.

If more than one Beneficiary survives you (or the Annuitant if the Contract
owner is not a natural person), we will divide the death benefit among your
Beneficiaries according to your most recent written instructions. If you have
not given us written instructions, we will pay the death benefit in equal
amounts to the surviving Beneficiaries.

MODIFICATION OF THE CONTRACT

Only a Glenbrook officer may approve a change in or waive any provision of the
Contract. Any change or waiver must be in writing. None of our agents have the
authority to change or waive the provisions of the Contract. We may not change
the terms of the Contract without your consent except to conform the Contract
to applicable law or changes in the law. If a provision of the Contract is
inconsistent with state law, we will follow state law.

ASSIGNMENT

We will not honor an assignment of an interest in a Contract as collateral or
security for a loan. However, you may assign periodic income payments under the
Contract prior to the Payout Start Date. No Beneficiary may assign benefits
under the Contract until they are due. We will not be bound by any assignment
until the assignor signs it and files it with us. We are not responsible for
the validity of any assignment. Federal law prohibits or restricts the
assignment of benefits under many types of retirement plans and the terms of
such plans may themselves contain restrictions on assignments. An assignment
may also result in taxes or tax penalties. You should consult with an attorney
before trying to assign your Contract.

                                       12
<PAGE>

PURCHASES
- --------------------------------------------------------------------------------

MINIMUM PURCHASE PAYMENTS

Your initial purchase payment must be at least $5,000 ($2,000 for a Qualified
Contract). All subsequent purchase payments must be $500 or more. You may make
purchase payments of at least $500 at any time prior to the Payout Start Date.
We reserve the right to limit the maximum amount of purchase payments we will
accept. We also reserve the right to reject any application.

MINIMUM AND MAXIMUM ALLOWABLE AGE

You can purchase a Contract if you are between your state's age of majority and
90. If the owner is a non-natural person, then the Annuitant must be between
the ages of 0 and 90.

AUTOMATIC ADDITIONS PROGRAM

You may make additional purchase payments of at least $100 ($500 for allocation
to the Fixed Account) by automatically transferring amounts from your bank
account. Consult your sales representative for more detailed information.

ALLOCATION OF PURCHASE PAYMENTS

At the time you apply for a Contract, you must decide how to allocate your
purchase payments among the Investment Alternatives. The allocation you specify
on your application will be effective immediately. All allocations must be in
whole percents that total 100% or in whole dollars. You can change your
allocations by notifying us in writing. We reserve the right to limit the
availability of the Investment Alternatives.

We will allocate your additional purchase payments to the investment
alternatives according to your most recent instructions on file with us. Unless
you notify us in writing otherwise, we will allocate subsequent purchase
payments according to the allocation for the previous purchase payment. We will
effect any change in allocation instructions at the time we receive written
notice of the change in good order.

We will credit the initial purchase payment that accompanies your completed
application to your Contract within 2 business days after we receive the
payment at our headquarters. If your application is incomplete, we will ask you
to complete your application within 5 business days. If you do so, we will
credit your initial purchase payment to your Contract within that 5 business
day period. If you do not, we will return your purchase payment at the end of
the 5 business day period unless you expressly allow us to hold it until you
complete the application. We will credit additional purchase payments to the
Contract at the close of the business day on which we receive the purchase
payment at our headquarters.

We use the term "business day" to refer to each day Monday through Friday that
the New York Stock Exchange is open for business. We also refer to these days
as "Valuation Dates." Our business day closes when the New York Stock Exchange
closes, usually 4 p.m. Eastern Time (3 p.m. Central Time). If we receive your
purchase payment after 3 p.m. Central Time on any Valuation Date, we will
credit your purchase payment using the Accumulation Unit Values computed on the
next Valuation Date.

RIGHT TO CANCEL

You may cancel the Contract by returning it to us within the Cancellation
Period, which is the 20-day period after you receive the Contract or such
longer period as your state may require. You may return it by delivering it or
mailing it to us. If you exercise this "Right to Cancel," the Contract
terminates and we will pay you the full amount of your purchase payments
allocated to the Fixed Account. We also will return your purchase payments
allocated to the Variable Account after an adjustment, to the extent federal or
state law permits, to reflect investment gain or loss that occurred from the
date of allocation through the date of cancellation. Some states may require us
to return a greater amount to you.

                                       13
<PAGE>

CONTRACT VALUE
- --------------------------------------------------------------------------------

On the Issue Date, your Contract Value is equal to your initial purchase
payment. Thereafter, your Contract Value at any time during the Accumulation
Phase is equal to the sum of the value of your Accumulation Units in the
Variable Sub-Accounts you have selected, plus the value of your interest in the
Fixed Account.

ACCUMULATION UNITS

To determine the number of Accumulation Units of each Variable Sub-Account to
credit to your Contract, we divide (i) the amount of the purchase payment or
transfer you have allocated to a Variable Sub-Account by (ii) the Accumulation
Unit Value of that Variable Sub-Account next computed after we receive your
payment or transfer. For example, if we receive a $10,000 purchase payment
allocated to a Variable Sub-Account when the Accumulation Unit Value for the
Sub-Account is $10, we would credit 1,000 Accumulation Units of that Variable
Sub-Account to your Contract.

ACCUMULATION UNIT VALUE

As a general matter, the Accumulation Unit Value for each Variable Sub-Account
will rise or fall to reflect:

 . changes in the share price of the Fund in which the Variable Sub-Account
   invests, and

 . the deduction of amounts reflecting the mortality and expense risk charge,
   administrative expense charge, and any provision for taxes that have
   accrued since we last calculated the Accumulation Unit Value.

We determine contract maintenance charges, withdrawal charges, and transfer
fees (currently waived) separately for each Contract. They do not affect the
Accumulation Unit Value. Instead, we obtain payment of those charges and fees
by redeeming Accumulation Units. For details on how we compute Accumulation
Unit Value, please refer to the Statement of Additional Information.

We determine a separate Accumulation Unit Value for each Variable Sub-Account
on each Valuation Date.

You should refer to the prospectus for the Funds that accompanies this
prospectus for a description of how the assets of each Fund are valued, since
that determination directly bears on the Accumulation Unit Value of the
corresponding Variable Sub-Account and, therefore, your Contract Value.

                                       14
<PAGE>

INVESTMENT ALTERNATIVES: The Variable Sub-Accounts
- --------------------------------------------------------------------------------

You may allocate your purchase payments to up to 17 Variable Sub-Accounts. Each
Variable Sub-Account invests in the shares of a corresponding Fund. Each Fund
has its own investment objective(s) and policies. We briefly describe the Funds
below.

For more complete information about each Fund, including expenses and risks
associated with the Fund, please refer to the accompanying prospectus for the
Fund. You should carefully review the prospectus for the Funds before
allocating amounts to the Variable Sub-Accounts. A I M Advisors, Inc. serves as
the investment advisor to each Fund.

<TABLE>
  <C>                                             <S>
  Fund:                                           Each Fund Seeks*:
- ------------------------------------------------------------------------------
  AIM V.I. Aggressive Growth Fund**               Long-term growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Balanced Fund                          As high a total return as
                                                  possible, consistent with
                                                  preservation of capital
- ------------------------------------------------------------------------------
  AIM V.I. Blue Chip Fund                         Long-term growth of capital
                                                  with secondary objective of
                                                  current income
- ------------------------------------------------------------------------------
  AIM V.I. Capital Appreciation Fund              Growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Capital Development Fund               Long-term growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Dent Demographic Trends Fund           Long-term growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Diversified Income Fund                High level of current income
- ------------------------------------------------------------------------------
  AIM V.I. Global Growth and Income Fund          Long-term growth of capital
                                                  together with current income
- ------------------------------------------------------------------------------
  AIM V.I. Global Utilities Fund                  High level of current income
                                                  and a secondary objective of
                                                  growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Government Securities Fund             High level of current income
                                                  consistent with reasonable
                                                  concern for safety of
                                                  principal
- ------------------------------------------------------------------------------
  AIM V.I. Growth Fund                            Growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Growth and Income Fund                 Growth of capital with a
                                                  secondary objective of
                                                  current income
- ------------------------------------------------------------------------------
  AIM V.I. High Yield Fund                        High level of current income
- ------------------------------------------------------------------------------
  AIM V.I. International Equity Fund              Long-term growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Money Market Fund                      As high a level of current
                                                  income as is consistent with
                                                  the preservation of capital
                                                  and liquidity
- ------------------------------------------------------------------------------
  AIM V.I. Telecommunications and Technology Fund Long-term growth of capital
- ------------------------------------------------------------------------------
  AIM V.I. Value Fund                             Long-term growth of capital
</TABLE>

- ----------------
   * A fund's investment objective may be changed by the Fund's Board of
     Trustees without shareholder approval.
  ** Due to the sometime limited availability of common stocks of small-cap
     companies that meet the investment criteria for AIM V.I. Aggressive Growth
     Fund, the Fund may periodically suspend or limit the offering of its
     shares. The Fund may be closed to new participants when Fund assets reach
     $200 million. If the Fund is closed, Contract owners maintaining an
     allocation of Contract Value in that Fund will nevertheless be permitted
     to allocate additional purchase payments to the Fund.

Amounts you allocate to Variable Sub-Accounts may grow in value, decline in
value, or grow less than you expect, depending on the investment performance of
the Funds in which those Variable Sub-Accounts invest. You bear the investment
risk that the Funds might not meet their investment objectives. Shares of the
Funds are not deposits, or obligations of, or guaranteed or endorsed by any
bank and are not insured by the Federal Deposit Insurance Corporation, the
Federal Reserve Board or any other agency.

                                       15
<PAGE>

INVESTMENT ALTERNATIVES: The Fixed Account
- --------------------------------------------------------------------------------

You may allocate all or a portion of your purchase payments to the Fixed
Account. The Fixed Account may not be available in all states. Please consult
with your sales representative for current information. The Fixed Account
supports our insurance and annuity obligations. The Fixed Account consists of
our general assets other than those in segregated asset accounts. We have sole
discretion to invest the assets of the Fixed Account, subject to applicable
law. Any money you allocate to the Fixed Account does not entitle you to share
in the investment experience of the Fixed Account.

GUARANTEE PERIODS

Each payment or transfer allocated to the Fixed Account earns interest at a
specified rate that we guarantee for a period of years we call a Guarantee
Period. Guarantee Periods may range from 1 to 10 years. We are currently
offering Guarantee Periods of 1, 3, 5, 7, and 10 years in length. In the
future, we may offer Guarantee Periods of different lengths or stop offering
some Guarantee Periods.

You select the Guarantee Period for each amount that you allocate to the Fixed
Account. If you do not select a Guarantee Period for a purchase payment or
transfer, we will assign the same period(s) as used for the most recent
purchase payment.

Each payment or transfer allocated to any one Guarantee Period must be at least
$500. We reserve the right to limit the number of additional purchase payments
that you may allocate to any one Guarantee Period.

INTEREST RATES

We will tell you what interest rates and Guarantee Periods we are offering at a
particular time. We may declare different interest rates for Guarantee Periods
of the same length that begin at different times. We will not change the
interest rate that we credit to a particular allocation until the end of the
relevant Guarantee Period.

We have no specific formula for determining the rate of interest that we will
declare initially or in the future. We will set those interest rates based on
investment returns available at the time of the determination. In addition, we
may consider various other factors in determining interest rates including
regulatory and tax requirements, sales commissions and administrative expenses,
general economic trends, and competitive factors. We determine the interest
rates to be declared in our sole discretion. We can neither predict nor
guarantee what those rates will be in the future. For current interest rate
information, please contact your sales representative or Glenbrook at 1-800-
776-6978.

The interest rate will never be less than the minimum guaranteed rate stated in
the Contract.

HOW WE CREDIT INTEREST

We will credit interest daily to each amount allocated to a Guarantee Period at
a rate that compounds to the annual interest rate that we declared at the
beginning of the applicable Guarantee Period. The following example illustrates
how a purchase payment allocated to the Fixed Account would grow, given an
assumed Guarantee Period and annual interest rate:

<TABLE>
   <S>                                                                   <C>
   Purchase Payment..................................................... $10,000
   Guarantee Period..................................................... 5 years
   Annual Interest Rate.................................................   4.50%
</TABLE>

                                       16
<PAGE>

                              END OF CONTRACT YEAR

<TABLE>
<CAPTION>
                            YEAR 1     YEAR 2     YEAR 3     YEAR 4     YEAR 5
                          ---------- ---------- ---------- ---------- ----------
<S>                       <C>        <C>        <C>        <C>        <C>
Beginning Contract Value  $10,000.00
X (1 + Annual Interest
 Rate)                        X1.045
                          $10,450.00
Contract Value at end of
 Contract Year                       $10,450.00
X (1 + Annual Interest
 Rate)                                   X1.045
                                     $10,920.25
Contract Value at end of
 Contract Year                                  $10,920.25
X (1 + Annual Interest
 Rate)                                              X1.045
                                                $11,411.66
Contract Value at end of
 Contract Year                                             $11,411.66
X (1 + Annual Interest
 Rate)                                                         X1.045
                                                           $11,925.19
Contract Value at end of
 Contract Year                                                        $11,925.19
X (1 + Annual Interest
 Rate)                                                                    X1.045
                                                                      $12,461.82
</TABLE>

Total Interest Credited During Guarantee Period = $2,461.82 ($12,461.82-
$10,000)

This example assumes no withdrawals during the entire 5 year Guarantee Period.
If you were to make a partial withdrawal, you may be required to pay a
withdrawal charge. In addition, the amount withdrawn may be increased or
decreased by a Market Value Adjustment that reflects changes in interest rates
since the time you invested the amount withdrawn. The hypothetical interest
rate is for illustrative purposes only and is not intended to predict future
interest rates to be declared under the Contract. Actual interest rates
declared for any given Guarantee Period may be more or less than shown above
but will never be less than the guaranteed minimum rate stated in the Contract.

RENEWALS

Prior to the end of each Guarantee Period, we will mail you a notice asking you
what to do with your money. During the 30-day period after the end of the
Guarantee Period, you may:

  1) take no action. We will automatically apply your money to a new
  Guarantee Period of the same length as the expired Guarantee Period. The
  new Guarantee Period will begin on the day the previous Guarantee Period
  ends. The new interest rate will be our then current declared rate for a
  Guarantee Period of that length; or

  2) instruct us to apply your money to one or more new Guarantee Periods of
  your choice. The new Guarantee Period(s) will begin on the day the previous
  Guarantee Period ends. The new interest rate will be our then current
  declared rate for those Guarantee Periods; or

  3) instruct us to transfer all or a portion of your money to one or more
  Variable Sub-Accounts of the Variable Account. We will effect the transfer
  on the day we receive your instructions. We will not adjust the amount
  transferred to include a Market Value Adjustment; or

  4) withdraw all or a portion of your money. You may be required to pay a
  withdrawal charge, but we will not adjust the amount withdrawn to include a
  Market Value Adjustment. The amount withdrawn will be deemed to have been
  withdrawn on the day the previous Guarantee Period ends. Unless you specify
  otherwise, amounts not withdrawn will be applied to a new Guarantee Period
  of the same length as the previous Guarantee Period. The new Guarantee
  Period will begin on the day the previous Guarantee Period ends.

                                       17
<PAGE>

MARKET VALUE ADJUSTMENT

All withdrawals in excess of the Free Withdrawal Amount and transfers from a
Guarantee Period, other than those taken during the 30 day period after such
Guarantee Period expires, are subject to a Market Value Adjustment. A Market
Value Adjustment also may apply upon payment of a death benefit (a Market Value
Adjustment made upon payment of a death benefit, if any, would be positive),
and when you apply amounts currently invested in a Guarantee Period to an
Income Plan (unless paid or applied during the 30-day period after such
Guarantee Period expires). We will not apply a Market Value Adjustment to a
withdrawal you make:

  . within the Free Withdrawal Amount as described on page 22,

  . as part of the Dollar Cost Averaging Program, or

  . withdrawals taken to satisfy IRS required minimum distribution rules for
    the Contract.

We apply the Market Value Adjustment to reflect changes in interest rates from
the time you first allocate money to a Guarantee Period to the time it is
removed from that Guarantee Period. We calculate the Market Value Adjustment by
comparing the Treasury Rate for a period equal to the Guarantee Period at its
inception to the Treasury Rate for a period equal to the time remaining in the
Guarantee Period when you remove your money. "Treasury Rate" means the U.S.
Treasury Note Constant Maturity Yield as reported in Federal Reserve Bulletin
Release H.15.

The Market Value Adjustment may be positive or negative, depending on changes
in interest rates. As such, you bear the investment risk associated with
changes in interest rates. If interest rates increase significantly, the Market
Value Adjustment and any withdrawal charge, premium taxes, and income tax
withholding (if applicable) could reduce the amount you receive upon full
withdrawal of your Contract Value to an amount that is less than the purchase
payment plus interest at the minimum guaranteed interest rate under the
Contract.

Generally, if the Treasury Rate at the time you allocate money to a Guarantee
Period is higher than the applicable current Treasury Rate, then the Market
Value Adjustment will result in a higher amount payable to you, transferred, or
applied to an Income Plan. Conversely, if the Treasury Rate at the time you
allocate money to a Guarantee Period is lower than the applicable current
Treasury Rate, then the Market Value Adjustment will result in a lower amount
payable to you, transferred, or applied to an Income Plan.

  For example, assume that you purchase a Contract and you select an initial
  Guarantee Period of 5 years and the 5 year Treasury Rate for that duration
  is 4.50%. Assume that at the end of 3 years, you make a partial withdrawal.
  If, at that later time, the current 2 year Treasury Rate is 4.20%, then the
  Market Value Adjustment will be positive, which will result in an increase
  in the amount payable to you. Conversely, if the current 2 year Treasury
  Rate is 4.80%, then the Market Value Adjustment will be negative, which
  will result in a decrease in the amount payable to you.

The formula for calculating Market Value Adjustments is set forth in Appendix B
to this prospectus, which also contains additional examples of the application
of the Market Value Adjustment.

                                       18
<PAGE>

INVESTMENT ALTERNATIVES: Transfers
- --------------------------------------------------------------------------------

TRANSFERS DURING THE ACCUMULATION PHASE

During the Accumulation Phase, you may transfer Contract Value among the
investment alternatives. You may request transfers in writing on a form that we
provide or by telephone according to the procedure described below. The minimum
amount that you may transfer into a Guarantee Period is $500. We currently do
not assess, but reserve the right to assess, a $10 charge on each transfer in
excess of 12 per Contract Year. We treat transfers to or from more than one
Fund on the same day as one transfer.

We will process transfer requests that we receive before 3:00 p.m. Central Time
on any Valuation Date using the Accumulation Unit Values for that Date. We will
process requests completed after 3:00 p.m. on any Valuation Date using the
Accumulation Unit Values for the next Valuation Date. The Contract permits us
to defer transfers from the Fixed Account for up to 6 months from the date we
receive your request. If we decide to postpone transfers from any Guarantee
Period for 30 days or more, we will pay interest as required by applicable law.
Any interest would be payable from the date we receive the transfer request to
the date we make the transfer.

If you transfer an amount from a Guarantee Period other than during the 30 day
period after such Guarantee Period expires, we will increase or decrease the
amount by a Market Value Adjustment. If any transfer reduces the value in the
Fixed Account to less than $500, we will treat the request as a transfer of the
entire value.

We reserve the right to waive any transfer restrictions.

TRANSFERS DURING THE PAYOUT PHASE

During the Payout Phase, you may make transfers among the Variable Sub-Accounts
to change the relative weighting of the Variable Sub-Accounts on which your
variable income payments will be based. In addition, you will have a limited
ability to make transfers from the Variable Sub-Accounts to increase the
proportion of your income payments consisting of fixed income payments. You may
not, however, convert any of your fixed income payments into variable income
payments.

You may not make any transfers for the first 6 months after the Payout Start
Date. Thereafter, you may make transfers among the Variable Sub-Accounts or
make transfers from the Variable Sub-Accounts to increase the proportion of
your income payments consisting of fixed income payments. Your transfers must
be at least 6 months apart.

TELEPHONE TRANSFERS

You may make transfers by telephone by calling 1-800-776-6978. The cut off time
for telephone transfer requests is 3:00 p.m. Central Time. In the event that
the New York Stock Exchange closes early, i.e., before 3:00 p.m. Central Time,
or in the event that the Exchange closes early for a period of time but then
reopens for trading on the same day, we will process telephone transfer
requests as of the close of the Exchange on that particular day. We will not
accept telephone requests received at any telephone number other than the
number that appears in this paragraph or received after the close of trading on
the Exchange.

We may suspend, modify or terminate the telephone transfer privilege at any
time without notice.

We use procedures that we believe provide reasonable assurance that the
telephone transfers are genuine. For example, we tape telephone conversations
with persons purporting to authorize transfers and request identifying
information. Accordingly, we disclaim any liability for losses resulting from
allegedly unauthorized telephone transfers. However, if we do not take
reasonable steps to help ensure that a telephone authorization is valid, we may
be liable for such losses.

EXCESSIVE TRADING LIMITS

For Contracts issued on or after May 1, 2000, we reserve the right to limit
transfers in any Contract year, or to refuse any transfer request for a
Contract owner or certain Contract owners, if:

                                       19
<PAGE>

  . we believe, in our sole discretion, that excessive trading by such
    Contract owner or owners, or a specific transfer request or group of
    transfer requests, may have a detrimental effect on the Accumulation Unit
    Values of any Variable Sub-Account or the share prices of the
    corresponding Funds or would be to the disadvantage of other Contract
    owners; or

  . we are informed by one or more of the corresponding Funds that they
    intend to restrict the purchase or redemption of Fund shares because of
    excessive trading or because they believe that a specific transfer or
    groups of transfers would have a detrimental effect on the prices of Fund
    shares.

We may apply the restrictions in any manner reasonably designed to prevent
transfers that we consider disadvantageous to other contract owners.

DOLLAR COST AVERAGING PROGRAM

Under the Dollar Cost Averaging Program, you may automatically transfer a set
amount at regular intervals during the Accumulation Phase from any Variable
Sub-Account, or a 1 year Guarantee Period of the Fixed Account, to any other
Variable Sub-Account. The intervals between transfers, may be monthly,
quarterly, semi-annually, or annually. You may not use the Dollar Cost
Averaging Program to transfer amounts to the Fixed Account.

We will not charge a transfer fee for transfers made under this Program, nor
will such transfers count against the 12 transfers you can make each Contract
Year without paying a transfer fee. In addition, we will not apply the Market
Value Adjustment to these transfers.

The theory of dollar cost averaging is that if purchases of equal dollar
amounts are made at fluctuating prices, the aggregate average cost per unit
will be less than the average of the unit prices on the same purchase dates.
However, participation in this Program does not assure you of a greater profit
from your purchases under the Program nor will it prevent or necessarily reduce
losses in a declining market.

AUTOMATIC FUND REBALANCING PROGRAM

Once you have allocated your money among the Variable Sub-Accounts, the
performance of each Sub-Account may cause a shift in the percentage you
allocated to each Sub-Account. If you select our Automatic Fund Rebalancing
Program, we will automatically rebalance the Contract Value in each Variable
Sub-Account and return it to the desired percentage allocations. Money you
allocate to the Fixed Account will not be included in the rebalancing.

We will rebalance your account each quarter according to your instructions. We
will transfer amounts among the Variable Sub-Accounts to achieve the percentage
allocations you specify. You can change your allocations at any time by
contacting us in writing or by telephone. The new allocation will be effective
with the first rebalancing that occurs after we receive your request. We are
not responsible for rebalancing that occurs prior to receipt of your request.

  Example:

  Assume that you want your initial purchase payment split among 2 Variable
  Sub-Accounts. You want 40% to be in the AIM V.I. Diversified Income
  Variable Sub-Account and 60% to be in the AIM V.I. Growth Variable Sub-
  Account. Over the next 2 months the bond market does very well while the
  stock market performs poorly. At the end of the first quarter, the AIM V.I.
  Diversified Income Variable Sub-Account now represents 50% of your holdings
  because of its increase in value. If you choose to have your holdings
  rebalanced quarterly, on the first day of the next quarter we would sell
  some of your units in the AIM V.I. Diversified Income Variable Sub-Account
  and use the money to buy more units in the AIM V.I. Growth Variable Sub-
  Account so that the percentage allocations would again be 40% and 60%
  respectively.

The Automatic Fund Rebalancing Program is available only during the
Accumulation Phase. The transfers made under the Program do not count towards
the 12 transfers you can make without paying a transfer fee, and are not
subject to a transfer fee.

Fund rebalancing is consistent with maintaining your allocation of investments
among market segments, although it is accomplished by reducing your Contract
Value allocated to the better performing segments.

                                       20
<PAGE>

EXPENSES
- --------------------------------------------------------------------------------

As a Contract owner, you will bear, directly or indirectly, the charges and
expenses described below.

CONTRACT MAINTENANCE CHARGE

During the Accumulation Phase, on each Contract Anniversary, we will deduct a
$35 contract maintenance charge from your Contract Value invested in each
Variable Sub-Account in proportion to the amount invested. During the Payout
Phase, we will deduct the charge proportionately from each income payment.

The charge is to compensate us for the cost of administering the Contracts and
the Variable Account. Maintenance costs include expenses we incur in processing
purchase payments; keeping records; processing death claims, cash withdrawals,
policy changes; proxy statements; calculating Accumulation Unit Values and
income payments; and issuing reports to Contract owners and regulatory
agencies. We cannot increase the charge. We will waive this charge if:

  . total purchase payments equal $50,000 or more, or

  . all of your money is allocated to the Fixed Account as of the Contract
    Anniversary.

If you surrender your Contract, we will deduct the full contract maintenance
charge unless your Contract qualifies for a waiver.

MORTALITY AND EXPENSE RISK CHARGE

We deduct a mortality and expense risk charge daily at an annual rate of 1.35%
of the average daily net assets you have invested in the Variable Sub-Accounts.
The mortality and expense risk charge is for all the insurance benefits
available with your Contract (including our guarantee of annuity rates and the
death benefits), for certain expenses of the Contract, and for assuming the
risk (expense risk) that the current charges will be sufficient in the future
to cover the cost of administering the Contract. If the charges under the
Contract are not sufficient, then we will bear the loss.

We guarantee the mortality and expense risk charge and we cannot increase it.
We assess the mortality and expense risk charge during both the Accumulation
Phase and the Payout Phase.

ADMINISTRATIVE EXPENSE CHARGE

We deduct an administrative expense charge daily at an annual rate of 0.10% of
the average daily net assets you have invested in the Variable Sub-Accounts. We
intend this charge to cover actual administrative expenses that exceed the
revenues from the contract maintenance charge. There is no necessary
relationship between the amount of administrative charge imposed on a given
Contract and the amount of expenses that may be attributed to that Contract. We
assess this charge each day during the Accumulation Phase and the Payout Phase.
We guarantee that we will not raise this charge.

TRANSFER FEE

We do not currently impose a fee upon transfers among the Investment
Alternatives. However, we reserve the right to charge $10 per transfer after
the 12th transfer in each Contract Year. We will not charge a transfer fee on
transfers that are part of a Dollar Cost Averaging or Automatic Fund
Rebalancing Program.

WITHDRAWAL CHARGE

We may assess a withdrawal charge of up to 6% of the purchase payment(s) you
withdraw. The charge declines to 0% after 7 complete years from the date we
received the purchase payment being withdrawn. A schedule

                                       21
<PAGE>

showing how the charge declines appears on page 7. During each Contract Year,
you can withdraw up to 10% of purchase payments without paying the charge.
Unused portions of this 10% "Free Withdrawal Amount" are not carried forward to
future Contract Years.

We will deduct withdrawal charges, if applicable, from the amount paid. For
purposes of the withdrawal charge, we will treat withdrawals as coming from the
oldest purchase payments first. However, for federal income tax purposes,
earnings are considered to come out first, which means you pay taxes on the
earnings portion of your withdrawal.

We do not apply a withdrawal charge in the following situations:

  . on the Payout Start Date (a withdrawal charge may apply if you elect to
    receive income payments for a specified period of less than 120 months);

  . the death of the Contract owner or Annuitant (unless the settlement value
    is used);

  . withdrawals taken to satisfy IRS minimum distribution rules; or

  . withdrawals that qualify for the waiver as described below.

We use the amounts obtained from the withdrawal charge to pay sales commissions
and other promotional or distribution expenses associated with marketing the
Contracts. To the extent that the withdrawal charge does not cover all sales
commissions and other promotional or distribution expenses, we may use any of
our corporate assets, including potential profit which may arise from the
mortality and expense risk charge or any other charges or fee described above,
to make up any difference.

Withdrawals may be subject to tax penalties or income tax and a Market Value
Adjustment. You should consult your own tax counsel or other tax advisers
regarding any withdrawals.

CONFINEMENT WAIVER

We will waive the withdrawal charge on all withdrawals taken prior to the
Payout Start Date under your Contract if the following conditions are
satisfied:

  1) you, or the Annuitant if the Contract is owned by a non-natural person,
  are first confined to a long term care facility or a hospital (as defined
  in the Contract) for at least 90 consecutive days. You or the Annuitant
  must enter the long term care facility or hospital at least 30 days after
  the Issue Date;

  2) we must receive the request for the withdrawal and due proof (as defined
  in the Contract) of the stay no later than 90 days following the end of
  your or the Annuitant's stay at the long term care facility or hospital;
  and

  3) a physician must have prescribed the stay and the stay must be medically
  necessary (as defined in the Contract).

You may not claim this benefit if you, or the Annuitant, or a member of your or
the Annuitant's immediate family (as defined in the Contract), is the physician
prescribing your or the Annuitant's stay in a long term care facility.

Please refer to your Contract for more detailed information about the terms and
conditions of these waivers.

The laws of your state may limit the availability of this waiver and may also
change certain terms and/or benefits available under the waiver. You should
consult your Contract for further details on these variations. Also, even if
you do not need to pay our withdrawal charge because of the waiver, you still
may be required to pay taxes or tax penalties on the amount withdrawn. You
should consult your tax adviser to determine the effect of a withdrawal on your
taxes.

PREMIUM TAXES

Some states and other governmental entities (e.g., municipalities) charge
premium taxes or similar taxes. We are responsible for paying these taxes and
will deduct them from your Contract Value. Some of these taxes are

                                       22
<PAGE>

due when the Contract is issued, others are due when income payments begin or
upon surrender. Our current practice is not to charge anyone for these taxes
until income payments begin or when a total withdrawal occurs including payment
upon death. We may discontinue this practice sometime in the future and deduct
premium taxes from the purchase payments. Premium taxes generally range from 0%
to 4%, depending on the state.

At the Payout Start Date, if applicable, we deduct the charge for premium taxes
from each investment alternative in the proportion that the Contract owner's
value in the investment alternative bears to the total Contract Value.

DEDUCTION FOR SEPARATE ACCOUNT INCOME TAXES

We are not currently maintaining a provision for taxes. In the future, however,
we may establish a provision for taxes if we determine, in our sole discretion,
that we will incur a tax as a result of the operation of the Variable Account.
We will deduct for any taxes we incur as a result of the operation of the
Variable Account, whether or not we previously made a provision for taxes and
whether or not it was sufficient. Our status under the Internal Revenue Code is
briefly described in the Statement of Additional Information.

OTHER EXPENSES

Each Fund deducts advisory fees and other expenses from its assets. You
indirectly bear the charges and expenses of the Funds whose shares are held by
the Variable Sub-Accounts. These fees and expenses are described in the
accompanying prospectus for the AIM Variable Insurance Funds. For a summary of
current estimates of those charges and expenses, see pages 7-9 above. We may
receive compensation from A I M Advisors, Inc., for administrative services we
provide to the Funds.

                                       23
<PAGE>

ACCESS TO YOUR MONEY
- --------------------------------------------------------------------------------

You can withdraw some or all of your Contract Value at any time prior to the
Payout Start Date. Withdrawals also are available under limited circumstances
on or after the Payout Start Date. See "Income Plans" on page 26.

The amount payable upon withdrawal is the Contract Value next computed after we
receive the request for a withdrawal at our headquarters, adjusted by any
Market Value Adjustment, less any withdrawal charges, contract maintenance
charges, income tax withholding, penalty tax, and any premium taxes. We will
pay withdrawals from the Variable Account within 7 days of receipt of the
request, subject to postponement in certain circumstances.

You can withdraw money from the Variable Account or the Fixed Account. To
complete a partial withdrawal from the Variable Account, we will cancel
Accumulation Units in an amount equal to the withdrawal and any applicable
withdrawal charge and premium taxes.

You must name the investment alternative(s) from which you are taking the
withdrawal. If none is named, then the withdrawal request is incomplete and
cannot be honored.

In general, you must withdraw at least $50 at a time. You also may withdraw a
lesser amount if you are withdrawing your entire interest in a Variable Sub-
Account.

If you request a total withdrawal, we may require you to return your Contract
to us. We also will deduct a contract maintenance charge of $35, unless we have
waived the contract maintenance charge on your Contract.

POSTPONEMENT OF PAYMENTS

We may postpone the payment of any amounts due from the Variable Account under
the Contract if:

  1) The New York Stock Exchange is closed for other than usual weekends or
  holidays, or trading on the Exchange is otherwise restricted;

  2) An emergency exists as defined by the SEC; or

  3) The SEC permits delay for your protection.

In addition, we may delay payments or transfers from the Fixed Account for up
to 6 months or a shorter period if required by law. If we delay payment or
transfer for 30 days or more, we will pay interest as required by law. Any
interest would be payable from the date we receive the withdrawal request to
the date we make the payment or transfer.

SYSTEMATIC WITHDRAWAL PROGRAM

You may choose to receive systematic withdrawal payments on a monthly,
quarterly, semi-annual, or annual basis at any time prior to the Payout Start
Date. The minimum amount of each systematic withdrawal is $50. At our
discretion, systematic withdrawals may not be offered in conjunction with the
Dollar Cost Averaging or Automatic Fund Rebalancing Programs.

Depending on fluctuations in the net asset value of the Variable Sub-Accounts
and the value of the Fixed Account, systematic withdrawals may reduce or even
exhaust the Contract Value. Income taxes may apply to systematic withdrawals.
Please consult your tax advisor before taking any withdrawal.

We will make systematic withdrawal payments to you or your designated payee. We
may modify or suspend the Systematic Withdrawal Program and charge a processing
fee for the service. If we modify or suspend the Systematic Withdrawal Program,
existing systematic withdrawal payments will not be affected.

                                       24
<PAGE>

MINIMUM CONTRACT VALUE

If your request for a partial withdrawal would reduce the amount in any
Guarantee Period to less than $500, we will treat the request as a withdrawal
of the entire amount invested in such Guarantee Period. In addition, if your
request for a partial withdrawal would reduce your Contract Value to less than
$1,000, we may treat it as a request to withdraw your entire Contract Value.
Your Contract will terminate if you withdraw all of your Contract Value. We
will, however, ask you to confirm your withdrawal request before terminating
your Contract. If we terminate your Contract, we will distribute to you its
Contract Value, adjusted by any applicable Market Value Adjustment, less
withdrawal and other charges, and taxes.

                                       25
<PAGE>

INCOME PAYMENTS
- --------------------------------------------------------------------------------

PAYOUT START DATE

You select the Payout Start Date in your application. The Payout Start Date is
the day that we apply your Contract Value, adjusted by any Market Value
Adjustment and less any applicable taxes, to an Income Plan. The Payout Start
Date must be no later than the Annuitant's 90th birthday, or the 10th Contract
Anniversary, if later.

You may change the Payout Start Date at any time by notifying us in writing of
the change at least 30 days before the scheduled Payout Start Date. Absent a
change, we will use the Payout Start Date stated in your Contract.

INCOME PLANS

An "Income Plan" is a series of payments on a scheduled basis to you or to
another person designated by you. You may choose and change your choice of
Income Plan until 30 days before the Payout Start Date. If you do not select an
Income Plan, we will make income payments in accordance with Income Plan 1 with
guaranteed payments for 10 years. After the Payout Start Date, you may not make
withdrawals (except as described below) or change your choice of Income Plan.

Three Income Plans are available under the Contract. Each is available to
provide:

  . fixed income payments;

  . variable income payments; or

  . a combination of the two.

The three Income Plans are:

  . Income Plan 1--Life Income with Guaranteed Payments.
   Under this plan, we make periodic income payments for at least as long as
   the Annuitant lives. If the Annuitant dies before we have made all of the
   guaranteed income payments, we will continue to pay the remainder of the
   guaranteed income payments as required by the Contract.

  . Income Plan 2--Joint and Survivor Life Income with Guaranteed Payments.
   Under this plan, we make periodic income payments for at least as long as
   Either the Annuitant or the joint Annuitant is alive. If both the
   Annuitant and the Joint Annuitant die before we have made all of the
   Guaranteed income payments, we will continue to pay the remainder of the
   guaranteed income payments as required by the Contract.

  . Income Plan 3--Guaranteed Payments for a Specified Period (5 Years to 30
    Years).
   Under this plan, we make periodic income payments for the period you have
   chosen. These payments do not depend on the Annuitant's life. Income
   payments for less than 120 months may be subject to a withdrawal charge.
   We will deduct the mortality and expense risk charge from the Variable
   Sub-Account assets that support variable income payments even though we
   may not bear any mortality risk.

The length of any guaranteed payment period under your selected Income Plan
generally will affect the dollar amounts of each income payment. As a general
rule, longer guarantee periods result in lower income payments, all other
things being equal. For example, if you choose an Income Plan with payments
that depend on the life of the Annuitant but with no minimum specified period
for guaranteed payments, the income payments

                                       26
<PAGE>

generally will be greater than the income payments made under the same Income
Plan with a minimum specified period for guaranteed payments.

If you choose Income Plan 1 or 2, or, if available, another Income Plan with
payments that continue for the life of the Annuitant or joint Annuitant, we may
require proof of age and sex of the Annuitant or joint Annuitant before
starting income payments, and proof that the Annuitant or joint Annuitant is
alive before we make each payment. Please note that under such Income Plans, if
you elect to take no minimum guaranteed payments, it is possible that the payee
could receive only 1 income payment if the Annuitant and any joint Annuitant
both die before the second income payment, or only 2 income payments if they
die before the third income payment, and so on.

Generally, you may not make withdrawals after the Payout Start Date. One
exception to this rule applies if you are receiving variable income payments
that do not depend on the life of the Annuitant (such as under Income Plan 3).
In that case you may terminate all or a portion of the Variable Account portion
of the income payments at any time and receive a lump sum equal to the present
value of the remaining variable payments associated with the amount withdrawn.
To determine the present value of any remaining variable income payments being
withdrawn, we use a discount rate equal to the assumed annual investment rate
that we use to compute such variable income payments. The minimum amount you
may withdraw under this feature is $1,000. A withdrawal charge may apply. We
also assess applicable premium taxes against all income payments.

We may make other Income Plans available. You may obtain information about them
by writing or calling us.

You must apply at least the Contract Value in the Fixed Account on the Payout
Start Date to fixed income payments. If you wish to apply any portion of your
Fixed Account option balance to provide variable income payments, you should
plan ahead and transfer that amount to the Variable Sub-Accounts prior to the
Payout Start Date. If you do not tell us how to allocate your Contract Value
among fixed and variable income payments, we will apply your Contract Value in
the Variable Account to variable income payments and your Contract Value in the
Fixed Account to fixed income payments.

We will apply your Contract Value, adjusted by a Market Value Adjustment, less
applicable taxes to your Income Plan on the Payout Start Date. If the amount
available to apply under an Income Plan is less than $2,000 or not enough to
provide an initial payment of at least $20, and state law permits, we may:

  . pay you the Contract Value, adjusted by any Market Value Adjustment and
    less any applicable taxes, in a lump sum instead of the periodic payments
    you have chosen, or

  . reduce the frequency of your payments so that each payment will be at
    least $20.

VARIABLE INCOME PAYMENTS

The amount of your variable income payments depends upon the investment results
of the Variable Sub-Accounts you select, the premium taxes you pay, the age and
sex of the Annuitant, and the Income Plan you choose. We guarantee that the
payments will not be affected by (a) actual mortality experience and (b) the
amount of our administration expenses.

We cannot predict the total amount of your variable income payments. Your
variable income payments may be more or less than your total purchase payments
because (a) variable income payments vary with the investment results of the
underlying Funds and (b) the Annuitant could live longer or shorter than we
expect based on the tables we use.

In calculating the amount of the periodic payments in the annuity tables in the
Contract, we assumed an annual investment rate of 3%. If the actual net
investment return of the Variable Sub-Accounts you choose is less than this
assumed investment rate, then the dollar amount of your variable income
payments will decrease. The dollar amount of your variable income payments will
increase, however, if the actual net investment return exceeds the assumed
investment rate. The dollar amount of the variable income payments stays level
if the net investment return equals the assumed investment rate. Please refer
to the Statement of Additional Information for more detailed information as to
how we determine variable income payments.

                                       27
<PAGE>

FIXED INCOME PAYMENTS

We guarantee income payment amounts derived from the Fixed Account for the
duration of the Income Plan. We calculate the fixed income payments by:

  1) adjusting the portion of the Contract Value in the Fixed Account on the
  Payout Start Date by any applicable Market Value Adjustment;

  2) deducting any applicable premium tax; and

  3) applying the resulting amount to the greater of (a) the appropriate
  value from the income payment table in your Contract or (b) such other
  value as we are offering at that time.

We may defer making fixed income payments for a period of up to 6 months or
such shorter time as state law may require. If we defer payments for 30 days or
more, we will pay interest as required by law from the date we receive the
withdrawal request to the date we make payment.

CERTAIN EMPLOYEE BENEFIT PLANS

The Contracts offered by this prospectus contain income payment tables that
provide for different payments to men and women of the same age, except in
states that require unisex tables. We reserve the right to use income payment
tables that do not distinguish on the basis of sex to the extent permitted by
law. In certain employment-related situations, employers are required by law to
use the same income payment tables for men and women. Accordingly, if the
Contract is to be used in connection with an employment-related retirement or
benefit plan and we do not offer unisex annuity tables in your state, you
should consult with legal counsel as to whether the purchase of a Contract is
appropriate.

                                       28
<PAGE>

DEATH BENEFITS
- --------------------------------------------------------------------------------

We will pay a death benefit if, prior to the Payout Start Date:

  1) any Contract owner dies or,

  2) the Annuitant dies, if the Contract is owned by a company or other legal
  entity.

We will pay the death benefit to the new Contract owner as determined
immediately after the death. The new Contract owner would be a surviving
Contract owner or, if none, the Beneficiary(ies). In the case of the death of
an Annuitant, we will pay the death benefit to the current Contract Owner.

DEATH BENEFIT AMOUNT

Prior to the Payout Start Date, the death benefit is equal to the greatest of:

  1) the Contract Value as of the date we determine the death benefit, or

  2) the Settlement Value (that is, the amount that would have been payable
  on a full withdrawal of the Contract Value) on the date that we determine
  the death benefit, or

  3) the Contract Value at the Death Benefit Anniversary immediately
  preceding the date that we determine the death benefit adjusted by any
  purchase payments, withdrawals, and charges made since that anniversary.

A "Death Benefit Anniversary" is every seventh Contract Anniversary beginning
with the Issue Date. For example, the Issue Date, 7th and 14th Contract
Anniversaries are the first three Death Benefit Anniversaries.

We will adjust the death benefit by any applicable Market Value Adjustment as
of the date we determine the death benefit (a Market Value Adjustment, if any,
made upon payment of a death benefit would be positive). The death benefit will
never be less than the sum of all purchase payments less any amounts previously
paid to the Contract owner (including income tax withholding).

A claim for a distribution on death must include "Due Proof of Death." We will
accept the following documentation as Due Proof of Death:

  . a certified copy of a death certificate;

  . a certified copy of a decree of a court of competent jurisdiction as to a
    finding of death; or

  . any other proof acceptable to us.

We will determine the value of the death benefit as of the end of the Valuation
Date on which we receive a complete request for the payment of the death
benefit. If we receive a request after 3:00 p.m. Central Time on a Valuation
Date, we will process the request as of the end of the following Valuation
Date.

ENHANCED DEATH BENEFIT OPTIONS

You can select an enhanced death benefit option when you purchase the Contract.

Enhanced Death Benefit A. If you select Enhanced Death Benefit A, the death
benefit will be the greater of the values stated in the Death Benefit Amount
provision above, or the value of Enhanced Death Benefit A. The Enhanced Death
Benefit A is:

  The greatest of the Anniversary Values as of the date we determine the
  death benefit. An "Anniversary Value" is equal to the Contract Value on a
  Contract Anniversary, increased by purchase payments made since that
  Anniversary and reduced by the amount of any partial withdrawals since that
  anniversary. Anniversary Values will be calculated for each Contract
  Anniversary prior to the earlier of:

    (i) the date we determine the death benefit, or

                                       29
<PAGE>

    (ii) the 75th birthday of the oldest Contract owner, or, the Annuitant
    if the Contract owner is not a natural person, or 5 years after the
    Issue Date, if later.

Enhanced Death Benefit B. If you select Enhanced Death Benefit B, the death
benefit will be the greater of the values stated in the Death Benefit Amount
provision above, or the value of Enhanced Death Benefit B. The Enhanced Death
Benefit B is:

  Total purchase payments minus the sum of all partial withdrawals. Each
  purchase payment and each partial withdrawal will accumulate daily at a
  rate equivalent to 5% per year until the earlier of:

    (i) the date we determine the death benefit, or

    (ii) the first day of the month following the 75th birthday of the
    oldest Contract owner, or, the Annuitant if the Contract owner is not a
    natural person, or 5 years after the Issue Date, if later.

If the enhanced death benefit option is purchased and neither option is
selected by the Owner, the Contract will automatically include Enhanced Death
Benefit A. We will determine the value of the death benefit at the end of the
Valuation Date on which we receive a complete request for payment of the death
benefit which includes due proof of death. Neither Enhanced Death Benefit A nor
Enhanced Death Benefit B will ever be greater than the maximum death benefit
allowed by any non-forfeiture laws which govern the Contract.

DEATH BENEFIT PAYMENTS

A death benefit will be paid if:

  1) the Contract owner elects to receive the death benefit distributed in a
  single payment within 180 days of the date of death, and

  2) the death benefit is paid as of the day we determine the value of the
  death benefit. Otherwise, we will pay the Settlement Value. The Settlement
  Value paid will be the Settlement Value next computed on or after the
  requested distribution date for payment or on the mandatory distribution
  date of 5 years after the date of death. We are currently waiving the 180
  day limit, but we reserve the right to enforce the limitation in the
  future.

In any event, the entire value of the Contract must be distributed within 5
years after the date of death unless an Income Plan is elected or a surviving
spouse continues the Contract in accordance with the provisions described
below.

The Contract owner eligible to receive death benefits has the following
options:

  1) If the Contract owner is not a natural person, then the Contract owner
  may receive the death benefit in one or more distributions.

  2) If the Contract owner is a natural person, the Contract owner may elect
  to receive the death benefit in one or more distributions or by periodic
  payments through an Income Plan. Payments from the Income Plan must begin
  within one year of the date of death and must be payable throughout:

    . the life of the Contract owner; or

    . a period not to exceed the life expectancy of the Contract owner; or

    . the life of the Contract owner with payments guaranteed for a period
      not to exceed the life expectancy of the Contract owner.

  3) If the surviving spouse of the deceased Contract owner is the new
  Contract owner, then the spouse may elect one of the options listed above
  or may continue the Contract in the Accumulation Phase as if the death had
  not occurred. The Contract may only be continued once. If the Contract is
  continued in the Accumulation Phase, the surviving spouse may make a single
  withdrawal of any amount within one year of the date of death without
  incurring a withdrawal charge. However, any applicable Market Value
  Adjustment, determined as of the date of the withdrawal, will apply.

Any death benefit payable in a lump sum must be paid within 5 years of the date
of death. If no election is made, funds will be distributed at the end of the 5
year period.

                                       30
<PAGE>

MORE INFORMATION
- --------------------------------------------------------------------------------

GLENBROOK

Glenbrook is the issuer of the Contract. Glenbrook is a stock life insurance
company organized under the laws of the State of Arizona in 1998. Previously,
Glenbrook was organized under the laws of the State of Illinois in 1992.
Glenbrook was originally organized under the laws of the State of Indiana in
1965. From 1965 to 1983 Glenbrook was known as "United Standard Life Assurance
Company" and from 1983 to 1992 as "William Penn Life Assurance Company of
America."

Glenbrook is currently licensed to operate in the District of Columbia and all
states, except New York. We intend to offer the Contract in those jurisdictions
in which we are licensed. Our headquarters is located at 3100 Sanders Road,
Northbrook, Illinois 60062.

Glenbrook is a wholly owned subsidiary of Allstate Life Insurance Company
("Allstate Life"), a stock life insurance company incorporated under the laws
of the State of Illinois. Allstate Life is a wholly owned subsidiary of
Allstate Insurance Company, a stock property-liability insurance company
incorporated under the laws of the State of Illinois. All of the outstanding
capital stock of Allstate Insurance Company is owned by The Allstate
Corporation.

Glenbrook and Allstate Life entered into a reinsurance agreement effective June
5, 1992. Under the reinsurance agreement, Allstate Life reinsures substantially
all of Glenbrook's liabilities under its various insurance contracts. The
reinsurance agreement provides us with financial backing from Allstate Life.
However, it does not create a direct contractual relationship between Allstate
Life and you. In other words, the obligations of Allstate Life under the
reinsurance agreement are to Glenbrook; Glenbrook remains the sole obligor
under the Contract to you.

Several independent rating agencies regularly evaluate life insurers' claims-
paying ability, quality of investments, and overall stability. A.M. Best
Company assigns A+ (Superior) to Allstate Life which automatically reinsures
all net business of Glenbrook. A.M. Best Company also assigns Glenbrook the
rating of A+(r) because Glenbrook automatically reinsures all net business with
Allstate Life. Standard & Poor's Insurance Rating Services assigns an AA+ (Very
Strong) financial strength rating and Moody's assigns an Aa2 (Excellent)
financial strength rating to Glenbrook. Glenbrook shares the same ratings of
its parent, Allstate Life. These ratings do not reflect the investment
performance of the Variable Account. We may from time to time advertise these
ratings in our sales literature.

THE VARIABLE ACCOUNT

Glenbrook established the Glenbrook Life and Annuity Company Separate Account A
on September 6, 1995. We have registered the Variable Account with the SEC as a
unit investment trust. The SEC does not supervise the management of the
Variable Account or Glenbrook.

We own the assets of the Variable Account. The Variable Account is a segregated
asset account under Arizona law. That means we account for the Variable
Account's income, gains and losses separately from the results of our other
operations. It also means that only the assets of the Variable Account that are
in excess of the reserves and other Contract liabilities with respect to the
Variable Account are subject to liabilities relating to our other operations.
Our obligations arising under the Contracts are general corporate obligations
of Glenbrook.

The Variable Account consists of 17 Variable Sub-Accounts, each of which
invests in a corresponding Fund. We may add new Variable Sub-Accounts or
eliminate one or more of them, if we believe marketing, tax, or investment
conditions so warrant. We do not guarantee the investment performance of the
Variable Account, its

                                       31
<PAGE>

Sub-Accounts or the Funds. We may use the Variable Account to fund our other
annuity contracts. We will account separately for each type of annuity contract
funded by the Variable Account.

THE FUNDS

Dividends and Capital Gain Distributions. We automatically reinvest all
dividends and capital gains distributions from the Funds in shares of the
distributing Fund at their net asset value.

Voting Privileges. As a general matter, you do not have a direct right to vote
the shares of the Funds held by the Variable Sub-Accounts to which you have
allocated your Contract Value. Under current law, however, you are entitled to
give us instructions on how to vote those shares on certain matters. Based on
our present view of the law, we will vote the shares of the Funds that we hold
directly or indirectly through the Variable Account in accordance with
instructions that we receive from Contract owners entitled to give such
instructions.

As a general rule, before the Payout Start Date, the Contract owner or anyone
with a voting interest is the person entitled to give voting instructions. The
number of shares that a person has a right to instruct will be determined by
dividing the Contract Value allocated to the applicable Variable Sub-Account by
the net asset value per share of the corresponding Fund as of the record date
of the meeting. After the Payout Start Date, the person receiving income
payments has the voting interest. The payee's number of votes will be
determined by dividing the reserve for such Contract allocated to the
applicable Variable Sub-account by the net asset value per share of the
corresponding Fund. The votes decrease as income payments are made and as the
reserves for the Contract decrease.

We will vote shares attributable to Contracts for which we have not received
instructions, as well as shares attributable to us, in the same proportion as
we vote shares for which we have received instructions, unless we determine
that we may vote such shares in our own discretion. We will apply voting
instructions to abstain on any item to be voted on a pro-rata basis to reduce
the votes eligible to be cast.

We reserve the right to vote Fund shares as we see fit without regard to voting
instructions to the extent permitted by law. If we disregard voting
instructions, we will include a summary of that action and our reasons for that
action in the next semi-annual financial report we send to you.

Changes in Funds. If the shares of any of the Funds are no longer available for
investment by the Variable Account or if, in our judgment, further investment
in such shares is no longer desirable in view of the purposes of the Contract,
we may eliminate that Fund and substitute shares of another eligible investment
fund. Any substitution of securities will comply with the requirements of the
1940 Act. We also may add new Variable Sub-Accounts that invest in additional
mutual funds. We will notify you in advance of any change.

Conflicts of Interest. Certain of the Funds sell their shares to separate
accounts underlying both variable life insurance and variable annuity
contracts. It is conceivable that in the future it may be unfavorable for
variable life insurance separate accounts and variable annuity separate
accounts to invest in the same Fund. The boards of directors of these Funds
monitor for possible conflicts among separate accounts buying shares of the
Funds. Conflicts could develop for a variety of reasons. For example,
differences in treatment under tax and other laws or the failure by a separate
account to comply with such laws could cause a conflict. To eliminate a
conflict, a Fund's board of directors may require a separate account to
withdraw its participation in a Fund. A Fund's net asset value could decrease
if it had to sell investment securities to pay redemption proceeds to a
separate account withdrawing because of a conflict.

THE CONTRACT

Distribution. ALFS, Inc.* ("ALFS"), located at 3100 Sanders Road, Northbrook,
Illinois 60062-7154, serves as principal underwriter of the Contracts. ALFS is
a wholly owned subsidiary of Allstate Life. ALFS is a registered broker dealer
under the Securities and Exchange Act of 1934, as amended ("Exchange Act"), and
is a member of the National Association of Securities Dealers, Inc.
- ----------------

*  Effective May 1, 2000, Allstate Life Financial Services, Inc. was renamed
   ALFS, Inc.

                                       32
<PAGE>

We will pay commissions to broker-dealers who sell the Contracts. Commissions
paid may vary, but we estimate that the total commissions paid on all Contract
sales will not exceed 8% of any purchase payments (on a present value basis).
These commissions are intended to cover distribution expenses. Sometimes, we
also pay the broker-dealer a persistency bonus in addition to the standard
commissions. We do not expect that a persistency bonus will exceed 1.20%, on an
annual basis, of the Contract Values considered in connection with the bonus.
These commissions are intended to cover distribution expenses. In some states,
Contracts may be sold by representatives or employees of banks which may be
acting as broker-dealers without separate registration under the Exchange Act,
pursuant to legal and regulatory exceptions.

Glenbrook does not pay ALFS a commission for distribution of the Contracts. The
underwriting agreement with ALFS provides that we will reimburse ALFS for any
liability to Contract owners arising out of services rendered or Contracts
issued.

Administration. We have primary responsibility for all administration of the
Contracts and the Variable Account. We provide the following administrative
services, among others:

  . issuance of the Contracts;

  . maintenance of Contract owner records;

  . Contract owner services;

  . calculation of unit values;

  . maintenance of the Variable Account; and

  . preparation of Contract owner reports.

We will send you Contract statements and transaction confirmations at least
annually. You should notify us promptly in writing of any address change. You
should read your statements and confirmations carefully and verify their
accuracy. You should contact us promptly if you have a question about a
periodic statement. We will investigate all complaints and make any necessary
adjustments retroactively, but you must notify us of a potential error within a
reasonable time after the date of the questioned statement. If you wait too
long, we reserve the right to make the adjustment as of the date that we
receive notice of the potential error.

We also will provide you with additional periodic and other reports,
information and prospectuses as may be required by federal securities laws.

QUALIFIED PLANS

If you use the Contract with a qualified plan, the plan may impose different or
additional conditions or limitations on withdrawals, waivers of withdrawal
charges, death benefits, Payout Start Dates, income payments, and other
Contract features. In addition, adverse tax consequences may result if
qualified plan limits on distributions and other conditions are not met. Please
consult your qualified plan administrator for more information.

LEGAL MATTERS

Freedman, Levy, Kroll & Simonds, Washington, D.C., has advised Glenbrook on
certain federal securities law matters. All matters of state law pertaining to
the Contracts, including the validity of the Contracts and Glenbrook's right to
issue such Contracts under state insurance law, have been passed upon by
Michael J. Velotta, General Counsel of Glenbrook.

                                       33
<PAGE>

YEAR 2000

Glenbrook is heavily dependent upon complex computer systems for all phases of
its operations, including customer service, and policy and contract
administration. Since many of Glenbrook's older computer software programs
recognize only the last two digits of the year in any date, some software may
have failed to operate properly in or after the year 1999, if the software was
not reprogrammed or replaced ("Year 2000 Issue"). Glenbrook believes that many
of its counterparties and suppliers also had potential Year 2000 Issues which
could affect Glenbrook. In 1995, Allstate Insurance Company commenced a four
phase plan intended to mitigate and/or prevent the adverse effects of Year 2000
Issues. These strategies included normal development and enhancement of new and
existing systems, upgrades to operating systems already covered by maintenance
agreements, and modifications to existing systems to make them Year 2000
compliant. The plan also included Glenbrook actively working with its major
external counterparties and suppliers to assess their compliance efforts and
Glenbrook's exposure to them. Because of the accuracy of this plan, and its
timely completion, Glenbrook has experienced no material impacts on its results
of operations, liquidity or financial position due to the Year 2000 issue. Year
2000 costs are expensed as incurred.

                                       34
<PAGE>

TAXES
- --------------------------------------------------------------------------------

The following discussion is general and is not intended as tax advice.
Glenbrook makes no guarantee regarding the tax treatment of any Contract or
transaction involving a Contract.

Federal, state, local and other tax consequences of ownership or receipt of
distributions under an annuity contract depend on your individual
circumstances. If you are concerned about any tax consequences with regard to
your individual circumstances, you should consult a competent tax adviser.

TAXATION OF ANNUITIES IN GENERAL

Tax Deferral. Generally, you are not taxed on increases in the Contract Value
until a distribution occurs. This rule applies only where:

  1) the Contract owner is a natural person,

  2) the investments of the Variable Account are "adequately diversified"
  according to Treasury Department regulations, and

  3) Glenbrook is considered the owner of the Variable Account assets for
  federal income tax purposes.

Non-natural Owners. As a general rule, annuity contracts owned by non-natural
persons such as corporations, trusts, or other entities are not treated as
annuity contracts for federal income tax purposes. The income on such contracts
is taxed as ordinary income received or accrued by the owner during the taxable
year. Please see the Statement of Additional Information for a discussion of
several exceptions to the general rule for Contracts owned by non-natural
persons.

Diversification Requirements. For a Contract to be treated as an annuity for
federal income tax purposes, the investments in the Variable Account must be
"adequately diversified" consistent with standards under Treasury Department
regulations. If the investments in the Variable Account are not adequately
diversified, the Contract will not be treated as an annuity contract for
federal income tax purposes. As a result, the income on the Contract will be
taxed as ordinary income received or accrued by the Contract owner during the
taxable year. Although Glenbrook does not have control over the Funds their
investments, we expect the Funds to meet the diversification requirements.

Ownership Treatment. The IRS has stated that you will be considered the owner
of Variable Account assets if you possess incidents of ownership in those
assets, such as the ability to exercise investment control over the assets. At
the time the diversification regulations were issued, the Treasury Department
announced that the regulations do not provide guidance concerning circumstances
in which investor control of separate account investments may cause an investor
to be treated as the owner of the separate account. The Treasury Department
also stated that future guidance would be issued regarding the extent that
owners could direct sub-account investments without being treated as owners of
the underlying assets of the separate account.

Your rights under the Contract are different than those described by the IRS in
rulings in which it found that contract owners were not owners of separate
account assets. For example, you have the choice to allocate premiums and
Contract Values among more Investment Alternatives. Also, you may be able to
transfer among Investment Alternatives more frequently than in such rulings.
These differences could result in you being treated as the owner of the
Variable Account. If this occurs, income and gain from the Variable Account
assets would be includible in your gross income. Glenbrook does not know what
standards will be set forth in any regulations or rulings which the Treasury
Department may issue. It is possible that future standards announced by the
Treasury Department could adversely affect the tax treatment of your Contract.
We reserve the right to modify the Contract as necessary to attempt to prevent
you from being considered the federal tax owner of the assets of the Variable
Account. However, we make no guarantee that such modification to the Contract
will be successful.

                                       35
<PAGE>

Taxation of Partial and Full Withdrawals. If you make a partial withdrawal
under a non-Qualified Contract, amounts received are taxable to the extent the
Contract Value, without regard to surrender charges, exceeds the investment in
the Contract. The investment in the Contract is the gross premium paid for the
Contract minus any amounts previously received from the Contract if such
amounts were properly excluded from your gross income. If you make a partial
withdrawal under a Qualified Contract, the portion of the payment that bears
the same ratio to the total payment that the investment in the Contract (i.e.,
nondeductible IRA contributions, after tax contributions to qualified plans)
bears to the Contract Value, is excluded from your income. If you make a full
withdrawal under a non-Qualified Contract or a Qualified Contract, the amount
received will be taxable only to the extent it exceeds the investment in the
Contract.

"Nonqualified distributions" from Roth IRAs are treated as made from
contributions first and are included in gross income only to the extent that
distributions exceed contributions. "Qualified distributions" from Roth IRAs
are not included in gross income. "Qualified distributions" are any
distributions made more than 5 taxable years after the taxable year of the
first contribution to any Roth IRA and which are:

  . made on or after the date the individual attains age 59 1/2,

  . made to a beneficiary after the Contract owner's death,

  . attributable to the Contract owner being disabled, or

  . for a first time home purchase (first time home purchases are subject a
    lifetime limit of $10,000).

If you transfer a non-Qualified Contract without full and adequate
consideration to a person other than your spouse (or to a former spouse
incident to a divorce), you will be taxed on the difference between the
Contract Value and the investment in the Contract at the time of transfer.
Except for certain Qualified Contracts, any amount you receive as a loan under
a Contract, and any assignment or pledge (or agreement to assign or pledge) of
the Contract Value is treated as a withdrawal of such amount or portion.

Taxation of Annuity Payments. Generally, the rule for income taxation of
annuity payments received from a non-Qualified Contract provides for the return
of your investment in the Contract in equal tax-free amounts over the payment
period. The balance of each payment received is taxable. For fixed annuity
payments, the amount excluded from income is determined by multiplying the
payment by the ratio of the investment in the Contract (adjusted for any refund
feature or period certain) to the total expected value of annuity payments for
the term of the Contract. If you elect variable annuity payments, the amount
excluded from taxable income is determined by dividing the investment in the
Contract by the total number of expected payments. The annuity payments will be
fully taxable after the total amount of the investment in the Contract is
excluded using these ratios. If you die, and annuity payments cease before the
total amount of the investment in the Contract is recovered, the unrecovered
amount will be allowed as a deduction for your last taxable year.

Taxation of Annuity Death Benefits. Death of a Contract owner, or death of the
Annuitant if the Contract is owned by a non-natural person, will cause a
distribution of death benefits from a Contract. Generally, such amounts are
included in income as follows:

  1) if distributed in a lump sum, the amounts are taxed in the same manner
  as a full withdrawal, or

  2) if distributed under an annuity option, the amounts are taxed in the
  same manner as an annuity payment. Please see the Statement of Additional
  Information for more detail on distribution at death requirements.

Penalty Tax on Premature Distributions. A 10% penalty tax applies to the
taxable amount of any premature distribution from a non-Qualified Contract. The
penalty tax generally applies to any distribution made prior to the date you
attain age 59 1/2. However, no penalty tax is incurred on distributions:

  1) made on or after the date the Contract owner attains age 59 1/2;

  2) made as a result of the Contract owner's death or disability;

  3) made in substantially equal periodic payments over the Contract owner's
  life or life expectancy;

                                       36
<PAGE>

  4) made under an immediate annuity; or

  5) attributable to investment in the Contract before August 14, 1982.

You should consult a competent tax advisor to determine if any other exceptions
to the penalty apply to your situation. Similar exceptions may apply to
distributions from Qualified Contracts.

Aggregation of Annuity Contracts. All non-qualified deferred annuity contracts
issued by Glenbrook (or its affiliates) to the same Contract owner during any
calendar year will be aggregated and treated as one annuity contract for
purposes of determining the taxable amount of a distribution.

TAX QUALIFIED CONTRACTS

Contracts may be used as investments with certain qualified plans such as:

  . Individual Retirement Annuities or Accounts (IRAs) under Section 408 of
    the Code;

  . Roth IRAs under Section 408A of the Code;

  . Simplified Employee Pension Plans under Section 408(k) of the Code;

  . Savings Incentive Match Plans for Employees (SIMPLE) Plans under Section
    408(p) of the Code;

  . Tax Sheltered Annuities under Section 403(b) of the Code;

  . Corporate and Self Employed Pension and Profit Sharing Plans; and

  . State and Local Government and Tax Exempt Organization Deferred
    Compensation Plans.

In the case of certain qualified plans, the terms of the plans may govern the
right to benefits, regardless of the terms of the Contract. The income on
qualified plan and IRA investments is tax deferred and variable annuities held
by such plans do not receive any additional tax deferral. You should review the
annuity features, including all benefits and expenses, prior to purchasing a
variable annuity in a qualified plan or IRA. Glenbrook reserves the right to
limit the availability of the Contract for use with any of the qualified plans
listed above.

Restrictions Under Section 403(b) Plans. Section 403(b) of the Code provides
tax-deferred retirement savings plans for employees of certain non-profit and
educational organizations. Under Section 403(b), any Contract used for a 403(b)
plan must provide that distributions attributable to salary reduction
contributions made after December 31, 1998, and all earnings on salary
reduction contributions, may be made only:

  1) on or after the date the employee

  . attains age 59 1/2,

  . separates from service,

  . dies,

  . becomes disabled, or

  2) on account of hardship (earnings on salary reduction contributions may
  not be distributed on account of hardship).

These limitations do not apply to withdrawals where Glenbrook is directed to
transfer some or all of the Contract Value to another 403(b) plan.

INCOME TAX WITHHOLDING

Glenbrook is required to withhold federal income tax at a rate of 20% on all
"eligible rollover distributions" unless you elect to make a "direct rollover"
of such amounts to an IRA or eligible retirement plan. Eligible

                                       37
<PAGE>

rollover distributions generally include all distributions from Qualified
Contracts, excluding IRAs, with the exception of:

  1) required minimum distributions, or

  2) a series of substantially equal periodic payments made over a period of
  at least 10 years, or, over the life (joint lives) of the participant (and
  beneficiary).

Glenbrook may be required to withhold federal and state income taxes on any
distributions from non-Qualified Contracts or Qualified Contracts that are not
eligible rollover distributions, unless you notify us of your election to not
have taxes withheld.

                                       38
<PAGE>

ANNUAL REPORTS AND OTHER DOCUMENTS
- --------------------------------------------------------------------------------

Glenbrook's annual report on Form 10-K for the year ended December 31, 1999 is
incorporated herein by reference, which means that it is legally a part of this
prospectus.

After the date of this prospectus and before we terminate the offering of the
securities under this prospectus, all documents or reports we file with the SEC
under the Exchange Act are also incorporated herein by reference, which means
that they also legally become a part of this prospectus.

Statements in this prospectus, or in documents that we file later with the SEC
and that legally become a part of this prospectus, may change or supersede
statements in other documents that are legally part of this prospectus.
Accordingly, only the statement that is changed or replaced will legally be a
part of this prospectus.

We file our Exchange Act documents and reports, including our annual and
quarterly reports on Form 10-K and Form 10-Q electronically on the SEC's
"EDGAR" system using the identifying number CIK No. 0000947878. The SEC
maintains a Web site that contains reports, proxy and information statements
and other information regarding registrants that file electronically with the
SEC. The address of the site is http://www.sec.gov. You also can view these
materials at the SEC's Public Reference Room at 450 Fifth Street, N.W.,
Washington, D.C. 20549. For more information on the operations of SEC's Public
Reference Room, call 1-800-SEC-0330.

If you have received a copy of this prospectus, and would like a free copy of
any document incorporated herein by reference (other than exhibits not
specifically incorporated by reference into the text of such documents), please
write or call us at P.O. Box 94039, Palatine, Illinois 60094-4039 (telephone:
1-800-776-6978).

                                       39
<PAGE>

PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------

We may advertise the performance of the Variable Sub-Accounts, including yield
and total return information. Yield refers to the income generated by an
investment in a Variable Sub-Account over a specified period. Total return
represents the change, over a specified period of time, in the value of an
investment in a Variable Sub-Account after reinvesting all income
distributions.

All performance advertisements will include, as applicable, standardized yield
and total return figures that reflect the deduction of insurance charges, the
contract maintenance charge, and withdrawal charge. Performance advertisements
also may include total return figures that reflect the deduction of insurance
charges, but not the contract maintenance or withdrawal charges. The deduction
of such charges would reduce the performance shown. In addition, performance
advertisements may include aggregate, average, year-by-year, or other types of
total return figures.

Performance information for periods prior to the inception date of the Variable
Sub-Accounts will be based on the historical performance of the corresponding
Funds for the periods beginning with the inception dates of the Funds and
adjusted to reflect current Contract expenses. You should not interpret these
figures to reflect actual historical performance of the Variable Account.

We may include in advertising and sales materials tax deferred compounding
charts and other hypothetical illustrations that compare currently taxable and
tax deferred investment programs based on selected tax brackets. Our
advertisements also may compare the performance of our Variable Sub-Accounts
with: (a) certain unmanaged market indices, including but not limited to the
Dow Jones Industrial Average, the Standard & Poor's 500, and the Shearson
Lehman Bond Index; and/or (b) other management investment companies with
investment objectives similar to the underlying funds being compared. In
addition, our advertisements may include the performance ranking assigned by
various publications, including the Wall Street Journal, Forbes, Fortune,
Money, Barron's, Business Week, USA Today, and statistical services, including
Lipper Analytical Services Mutual Fund Survey, Lipper Annuity and Closed End
Survey, the Variable Annuity Research Data Survey, and SEI.

                                       40
<PAGE>

EXPERTS
- --------------------------------------------------------------------------------

The financial statements and related financial statement schedule of Glenbrook
Life and Annuity Company as of December 31, 1999 and 1998 and for each of the
three years in the period ended December 31, 1999, which are incorporated
herein by reference, have been audited by Deloitte & Touche LLP, independent
auditors, as stated in their report, which are incorporated herein by
reference, and are included in reliance upon the report of such firm given upon
their authority as experts in accounting and auditing.

The financial statements of the Variable Account as of December 31, 1999, and
for each of the periods in the two years then ended, which is incorporated
herein by reference, have been audited by Deloitte & Touche LLP, independent
auditors, as stated in their report which is incorporated herein by reference,
and is so included in reliance upon the report of such firm given upon their
authority as experts in accounting and auditing.

                                       41
<PAGE>

                                   APPENDIX A
            Accumulation Unit Value and Number of Accumulation Units
           Outstanding for Each Variable Sub-Account Since Inception

<TABLE>
<CAPTION>
   For the Years Beginning
January 1* and Ending December
              31                 1995     1996      1997      1998      1999
- ------------------------------  ------- --------- --------- --------- ---------
<S>                             <C>     <C>       <C>       <C>       <C>
AIM V.I. AGGRESSIVE GROWTH
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --  $  10.000 $   9.810
  Accumulation Unit Value, End
   of Period..................      --        --        --  $   9.810 $  13.988
  Number of Units Outstanding,
   End of Period..............      --        --        --    163,537   247,763

AIM V.I. BALANCED SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --  $  10.000 $  11.193
  Accumulation Unit Value, End
   of Period..................      --        --        --  $  11.193 $  13.162
  Number of Units Outstanding,
   End of Period..............      --        --        --    244,603   297,688

AIM V.I. BLUE CHIP SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --        --        --
  Accumulation Unit Value, End
   of Period..................      --        --        --        --        --
  Number of Units Outstanding,
   End of Period..............      --        --        --        --        --

AIM V.I. CAPITAL APPRECIATION
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $   9.827 $  11.387 $  12.739 $  14.979
  Accumulation Unit Value, End
   of Period..................  $ 9.827 $  11.387 $  12.739 $  14.979 $  21.350
  Number of Units Outstanding,
   End of Period..............      996 4,471,775 7,850,032 8,770,421 7,460,389

AIM V.I. CAPITAL DEVELOPMENT
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --  $  10.000 $   9.160
  Accumulation Unit Value, End
   of Period..................      --        --        --  $   9.160 $  11.655
  Number of Units Outstanding,
   End of Period..............      --        --        --    126,384   104,456

AIM V.I. DENT DEMOGRAPHIC
 TRENDS SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --        --        --
  Accumulation Unit Value, End
   of Period..................      --        --        --        --        --
  Number of Units Outstanding,
   End of Period..............      --        --        --        --        --

AIM V.I. DIVERSIFIED INCOME
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $  10.068 $  10.934 $  11.788 $  12.035
  Accumulation Unit Value, End
   of Period..................  $10.068 $  10.934 $  11.788 $  12.035 $  11.633
  Number of Units Outstanding,
   End of Period..............        0   747,505 1,950,608 2,301,209 1,949,974

AIM V.I. GLOBAL GROWTH AND
 INCOME SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --        --        --
  Accumulation Unit Value, End
   of Period..................      --        --        --        --        --
  Number of Units Outstanding,
   End of Period..............      --        --        --        --        --

AIM V.I. GLOBAL UTILITIES SUB-
 ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $  10.209 $  11.276 $  13.518 $  15.534
  Accumulation Unit Value, End
   of Period..................  $10.209 $  11.276 $  13.518 $  15.534 $  20.432
  Number of Units Outstanding,
   End of Period..............        0   163,534   426,581   630,811   604,243

AIM V.I. GOVERNMENT SECURITIES
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $  10.082 $  10.164 $  10.835 $  11.484
  Accumulation Unit Value, End
   of Period..................  $10.082 $  10.164 $  10.835 $  11.484 $  11.189
  Number of Units Outstanding,
   End of Period..............        0   263,768   550,452   912,586   791,933
</TABLE>


                                      A-1
<PAGE>

<TABLE>
<CAPTION>
   For the Years Beginning
January 1* and Ending December
              31                 1995     1996      1997      1998      1999
- ------------------------------  ------- --------- --------- --------- ---------
<S>                             <C>     <C>       <C>       <C>       <C>
AIM V.I. GROWTH SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $   9.852 $  11.466 $  14.338 $  18.954
  Accumulation Unit Value, End
   of Period..................  $ 9.852 $  11.466 $  14.388 $  18.954 $  25.263
  Number of Units Outstanding,
   End of Period..............      104 2,070,239 4,031,175 5,170,994 4,664,892

AIM V.I. GROWTH AND INCOME
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $   9.897 $  11.699 $  14.496 $  18.243
  Accumulation Unit Value, End
   of Period..................  $ 9.897 $  11.699 $  14.496 $  18.243 $  24.138
  Number of Units Outstanding,
   End of Period..............      103 2,425,462 5,374,119 6,935,245 6,476,240

AIM V.I. HIGH YIELD SUB-
 ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --  $  10.000 $   9.141
  Accumulation Unit Value, End
   of Period..................      --        --        --  $   9.141 $   9.957
  Number of Units Outstanding,
   End of Period..............      --        --        --    170,679   207,626

AIM V.I. INTERNATIONAL EQUITY
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $  10.103 $  11.953 $  12.598 $  14.340
  Accumulation Unit Value, End
   of Period..................  $10.103 $  11.953 $  12.598 $  14.340 $  21.914
  Number of Units Outstanding,
   End of Period..............      936 1,969,297 3,667,815 3,847,934 3,482,659

AIM V.I. MONEY MARKET SUB-
 ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $  10.023 $  10.369 $  10.745 $  11.125
  Accumulation Unit Value, End
   of Period..................  $10.023 $  10.369 $  10.745 $  11.125 $  11.479
  Number of Units Outstanding,
   End of Period..............        0   894,947 1,291,169 1,389,344 1,636,925

AIM V.I. TELECOMMUNICATIONS
 SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........      --        --        --        --        --
  Accumulation Unit Value, End
   of Period..................      --        --        --        --        --
  Number of Units Outstanding,
   End of Period..............      --        --        --        --        --

AIM V.I. VALUE SUB-ACCOUNT
  Accumulation Unit Value,
   Beginning of Period........  $10.000 $   9.783 $  11.090 $  13.520 $  17.644
  Accumulation Unit Value, End
   of Period..................  $ 9.783 $  11.090 $  13.520 $  17.644 $  22.589
  Number of Units Outstanding,
   End of Period..............      966 3,528,353 7,294,719 9,222,186 8,450,007
</TABLE>
- ----------------

*All Variable Sub-Accounts commenced operations on December 4, 1995, with the
   exception of the AIM V.I. Aggressive Growth, Balanced, Capital Development,
   and High Yield Sub-Accounts, which commenced operations on May 1, 1998, and
   the AIM V.I. Blue Chip Fund, Dent Demographic Trends, Global Growth and
   Income, and Telecommunications and Technology Variable Sub-Accounts ("the
   New Sub-Accounts"). No Accumulation Unit data is shown for the New Sub-
   Accounts which commenced operations on January 3, 2000.

                                      A-2
<PAGE>

                                   APPENDIX B

                            MARKET VALUE ADJUSTMENT

The Market Value Adjustment is based on the following:

  I = the Treasury Rate for a maturity equal to the applicable Guarantee
  Period for the week preceding the establishment of the Guarantee Period.

  N = the number of whole and partial years from the date we receive the
  withdrawal, transfer, or death benefit request, or from the Payout Start
  Date, to the end of the Guarantee Period; and

  J = the Treasury Rate for a maturity of length N for the week preceding the
  receipt of the withdrawal, transfer, death benefit, or income payment
  request. If a note for a maturity of length N is not available, a weighted
  average will be used. If N is one year or less, J will be the 1-year
  Treasury rate.

  "Treasury Rate" means the U.S. Treasury Note Constant Maturity Yield as
  reported in Federal Reserve Bulletin Release H.15.

The Market Value Adjustment factor is determined from the following formula:

                                .9 X (I - J) X N

To determine the Market Value Adjustment, we will multiply the Market Value
Adjustment factor by the amount transferred, withdrawn (in excess of the Free
Withdrawal Amount), paid as a death benefit, or applied to an Income Plan, from
a Guarantee Period at any time other than during the 30 day period after such
Guarantee Period expires.

                      EXAMPLES OF MARKET VALUE ADJUSTMENT

<TABLE>
<S>                             <C>
Purchase Payment:               $10,000 allocated to a Guarantee Period

Guarantee Period:               5 years

Treasury Rate (at the time the
 Guarantee Period
 was established):              4.50%

Full Surrender:                 End of Contract Year 3
</TABLE>
- ----------------

NOTE: These examples assume that premium taxes are not applicable.

                                      B-1
<PAGE>

                 EXAMPLE 1: (Assumes declining interest rates)

<TABLE>
<S>                            <C>
Step 1. Calculate Contract
     Value at End of Contract
     Year 3:                   $10,000.00 X (1.045)/3/ = $11,411.66

Step 2. Calculate the Free
 Withdrawal Amount:            .10 X $10,000.00 = $1,000.00

Step 3. Calculate the
 Withdrawal Charge:            .05 X ($10,000.00 - $1,000.00) = $450.00

Step 4. Calculate the Market
 Value Adjustment:             I= 4.5%

                               J= 4.2%

                               730 days
                               --------
                               N = 365 days = 2

                               Market Value Adjustment Factor: .9 X (I - J) X N

                               = .9 X (.045 - .042) X (2) = .0054

                               Market Value Adjustment = Market Value
                               Adjustment Factor X Amount Subject to
                               Market Value Adjustment:

                               = .0054 X ($11,411.66 - $1,000.00) = $56.22

Step 5. Calculate the amount
     received by Contract
     owner as a result of
     full withdrawal at the
     end of Contract Year 3:   $11,411.66 - $450.00 + $56.22 = $11,017.88
</TABLE>

                   EXAMPLE 2: (Assumes rising interest rates)

<TABLE>
<S>                           <C>
Step 1. Calculate Contract
     Value at End of Year 3:
     Contract Year 3:         $10,000.00 X (1.045)/3/ = $11,411.66

Step 2. Calculate the Free
 Withdrawal Amount:           .10 X ($10,000.00) = $1,000.00

Step 3. Calculate the
 Withdrawal Charge:           .05 X ($10,000.00 - $1,000.00) = $450.00

Step 4. Calculate the Market
 Value Adjustment:            I= 4.5%

                              J= 4.8%

                              730 days
                              --------
                              N = 365 days = 2

                              Market Value Adjustment Factor: .9 X (I - J) X N

                              = .9 X (.045 - .048) X (2) = -.0054

                              Market Value Adjustment = Market Value
                              Adjustment Factor X Amount Subject to
                              Market Value Adjustment

                              = -.0054 X ($11,411.66 - $1,000.00) = -$56.22

Step 5. Calculate the amount
     received by Contract
     owner as a result of
     full withdrawal at the
     end of Contract Year 3:  $11,411.66 - $450.00 - $56.22 = $10,905.44
</TABLE>

                                      B-2
<PAGE>

                      STATEMENT OF ADDITIONAL INFORMATION

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                               Description                                 Page
                               -----------                                 ----
<S>                                                                        <C>
Additions, Deletions or Substitutions of Investments......................   1
The Contract..............................................................   1
  Purchases...............................................................   1
  Tax-free Exchanges (1035 Exchanges, Rollovers and Transfers)............   1
Performance Information...................................................   2
Standardized Total Returns................................................   2
Non-Standardized Total Returns............................................   3
Adjusted Historical Returns...............................................   4
Calculation of Accumulation Unit Values...................................   5
Net Investment Factors....................................................   5
Calculation of Variable Income Payments...................................   6
Calculation of Annuity Unit Values........................................   6
General Matters...........................................................   6
  Incontestability........................................................   6
  Settlements.............................................................   6
  Safekeeping of the Variable Account's Assets............................   6
  Premium Taxes...........................................................   7
  Tax Reserves............................................................   7
Federal Tax Matters.......................................................   7
  Taxation of Glenbrook Life and Annuity Company..........................   7
  Exceptions to the Non-Natural Owner Rule................................   7
  IRS Required Distribution at Death......................................   8
  Qualified Plans.........................................................   8
  Individual Retirement Annuities.........................................   8
  Roth Individual Retirement Annuities....................................   9
  Simplified Employee Pension Plans.......................................   9
  Savings Incentive Match Plans for Employees.............................   9
  Tax Sheltered Annuities.................................................   9
  Corporate and Self-Employed Pension-Profit Sharing Plans................   9
  State and Local Government and Tax-Exempt Organization Deferred
   Compensation Plans.....................................................  10
Experts...................................................................  10
Financial Statements......................................................  11
</TABLE>

This prospectus does not constitute an offering in any jurisdiction in which
such offering may not lawfully be made. We do not authorize anyone to provide
any information or representations regarding the offering described in this
prospectus other than as contained in this prospectus.

                                      C-1
<PAGE>

                  THE AIM LIFETIME PLUS(sm) VARIABLE ANNUITY

Glenbrook Life and Annuity Company           Statement of Additional Information
Glenbrook Life and Annuity Company                             dated May 1, 2000
Separate Account A
Post Office Box 94039
Palatine, IL 60094-4039
1 (800) 776-6978

This Statement of Additional Information supplements the information in the
prospectus for the AIM Lifetime Plus(sm) Variable Annuity. This Statement of
Additional Information is not a prospectus. You should read it with the
prospectus, dated May 1, 2000, for the Contract. You may obtain a prospectus by
calling or writing us at the address or telephone number listed above.

Except as otherwise noted, this Statement of Additional Information uses the
same defined terms as the prospectus.
<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                               Description                                 Page
                               -----------                                 ----
<S>                                                                        <C>
Additions, Deletions or Substitutions of Investments......................   1
The Contract..............................................................   1
  Purchases...............................................................   1
  Tax-free Exchanges (1035 Exchanges, Rollovers and Transfers)............   1
Performance Information...................................................   2
Standardized Total Returns................................................   2
Non-Standardized Total Returns............................................   3
Adjusted Historical Returns...............................................   4
Calculation of Accumulation Unit Values...................................   5
Net Investment Factors....................................................   5
Calculation of Variable Income Payments...................................   6
Calculation of Annuity Unit Values........................................   6
General Matters...........................................................   6
  Incontestability........................................................   6
  Settlements.............................................................   6
  Safekeeping of the Variable Account's Assets............................   6
  Premium Taxes...........................................................   7
  Tax Reserves............................................................   7
Federal Tax Matters.......................................................   7
  Taxation of Glenbrook Life and Annuity Company..........................   7
  Exceptions to the Non-Natural Owner Rule................................   7
  IRS Required Distribution at Death......................................   8
  Qualified Plans.........................................................   8
  Individual Retirement Annuities.........................................   8
  Roth Individual Retirement Annuities....................................   9
  Simplified Employee Pension Plans.......................................   9
  Savings Incentive Match Plans for Employees.............................   9
  Tax Sheltered Annuities.................................................   9
  Corporate and Self-Employed Pension-Profit Sharing Plans................   9
  State and Local Government and Tax-Exempt Organization Deferred
   Compensation Plans.....................................................  10
Experts...................................................................  10
Financial Statements......................................................  11
</TABLE>
<PAGE>

ADDITIONS, DELETIONS OR SUBSTITUTIONS OF INVESTMENTS

We may add, delete, or substitute the Fund shares held by any Variable
Sub-Account to the extent the law permits. We may substitute shares of any Fund
with those of another Fund of the same or different mutual fund if the shares of
the Fund are no longer available for investment, or if we believe investment in
any Fund would become inappropriate in view of the purposes of the Variable
Account.

We will not substitute shares attributable to a Contract owner's interest in a
Variable Sub-Account until we have notified the Contract owner of the change,
and until the Securities and Exchange Commission has approved the change, to the
extent such notification and approval are required by law. Nothing contained in
this Statement of Additional Information shall prevent the Variable Account from
purchasing other securities for other series or classes of contracts, or from
effecting a conversion between series or classes of contracts on the basis of
requests made by Contract owners.

We also may establish additional Variable Sub-Accounts or series of Variable
Sub-Accounts. Each additional Variable Sub-Account would purchase shares in a
new Fund of the same or different mutual fund. We may establish new Variable
Sub-Accounts when we believe marketing needs or investment conditions warrant.
We determine the basis on which we will offer any new Variable Sub-Accounts in
conjunction with the Contract to existing Contract owners. We may eliminate one
or more Variable Sub-Accounts if, in our sole discretion, marketing, tax or
investment conditions so warrant.

We may, by appropriate endorsement, change the Contract as we believe necessary
or appropriate to reflect any substitution or change in the Funds. If we believe
the best interests of persons having voting rights under the Contracts would be
served, we may operate the Variable Account as a management company under the
Investment Company Act of 1940 or we may withdraw its registration under such
Act if such registration is no longer required.
<PAGE>

THE CONTRACT

The Contract is primarily designed to aid individuals in long-term financial
planning. You can use it for retirement planning regardless of whether the
retirement plan qualifies for special federal income tax treatment.

PURCHASE OF CONTRACTS

We offer the Contracts to the public through banks as well as brokers licensed
under the federal securities laws and state insurance laws. The principal
underwriter for the Variable Account, ALFS, Inc. ("ALFS"), distributes the
Contracts. ALFS is an affiliate of Glenbrook. The offering of the Contracts is
continuous. We do not anticipate discontinuing the offering of the Contracts,
but we reserve the right to do so at any time.

TAX-FREE EXCHANGES (1035 EXCHANGES, ROLLOVERS AND TRANSFERS)

We accept purchase payments that are the proceeds of a Contract in a transaction
qualifying for a tax-free exchange under Section 1035 of the Internal Revenue
Code ("Code"). Except as required by federal law in calculating the basis of the
Contract, we do not differentiate between Section 1035 purchase payments and
non-Section 1035 purchase payments.

We also accept "rollovers" and transfers from Contracts qualifying as
tax-sheltered annuities ("TSAs"), individual retirement annuities or accounts
("IRAs"), or any other Qualified Contract that is eligible to "rollover" into an
IRA. We differentiate among non-Qualified Contracts, TSAs, IRAs and other
Qualified Contracts to the extent necessary to comply with federal tax laws. For
example, we restrict the assignment, transfer, or pledge of TSAs and IRAs so the
Contracts will continue to qualify for special tax treatment. A Contract owner
contemplating any such exchange, rollover or transfer of a Contract should
contact a competent tax adviser with respect to the potential effects of such a
transaction.
<PAGE>

PERFORMANCE INFORMATION

From time to time we may advertise the "standardized," "non-standardized," and
"adjusted historical" total returns of the Variable Sub-Accounts, as described
below. Please remember that past performance is not an estimate or guarantee of
future performance and does not necessarily represent the actual experience of
amounts invested by a particular Contract owner. The performance figures shown
do not reflect any applicable taxes.

STANDARDIZED TOTAL RETURNS

A Variable Sub-Account's standardized total return represents the average annual
total return of that Sub-Account over a particular period. We compute
standardized total return by finding the annual percentage rate that, when
compounded annually, will accumulate a hypothetical $1,000 purchase payment to
the redeemable value at the end of the one, five or ten year period, or for a
period from the date of commencement of the Variable Sub-Account's operations,
if shorter than any of the foregoing. We use the following formula prescribed by
the SEC for computing standardized total return:

                             $1,000(1 + T)^n = ERV


where:

T                 =      average annual total return

ERV               =      ending redeemable value  of a hypothetical $1,000
                         payment made at the beginning of 1, 5, or 10 year
                         periods or shorter period

n                 =      number of years in the period

$1000             =      hypothetical $1,000 investment

When factoring in the withdrawal charge assessed upon redemption, we exclude the
Free Withdrawal Amount, which is the amount you can withdraw from the Contract
without paying a withdrawal charge. We also use the withdrawal charge that would
apply upon redemption at the end of each period. Thus, for example, when
factoring in the withdrawal charge for a one year standardized total return
calculation, we would use the withdrawal charge that applies to a withdrawal of
a purchase payment made one year prior.

When factoring in the contract maintenance charge, we pro rate the charge by
dividing (i) the contract maintenance charge by (ii) the average contract size
of $57,476. We then multiply the resulting percentage by a hypothetical $1,000
investment.

The standardized total returns for the Variable Sub-Accounts for the periods
ended December 31, 1999 are set out below. No standardized total returns are
shown for the AIM V.I. Money Market Variable Sub-Account. In addition, no
standardized total returns are shown for the AIM V.I. Blue Chip, Dent
Demographic Trends, Global Growth and Income, and Telecommunications and
Technology Variable Sub-Accounts, which commenced operations on January 3, 2000.

<TABLE>
<CAPTION>
                                                                                Ten Years or
Variable Sub-Account                       One Year         Five Years         Since Inception
                                           --------         ----------         ---------------
<S>                                          <C>               <C>                <C>
AIM V.I. Aggressive Growth                   37.13%            N/A                19.37%
AIM V.I. Balanced                            12.13%            N/A                14.92%
AIM V.I. Blue Chip                             N/A             N/A                  N/A
AIM V.I. Capital Appreciation                37.08%            N/A                19.94%
AIM V.I. Capital Development                 21.79%            N/A                 6.47%
AIM V.I. Dent Demographic Trends               N/A             N/A                  N/A
AIM V.I. Diversified Income                  -8.79%            N/A                 2.93%
AIM V.I. Global Growth and Income              N/A             N/A                  N/A
AIM V.I. Global Utilities                    26.18%            N/A                18.62%
AIM V.I. Government Securities              -10.86%            N/A                 1.91%
AIM V.I. Growth                              27.83%            N/A                25.09%
AIM V.I. Growth & Income                     26.86%            N/A                23.67%
AIM V.I. High Yield                           3.48%            N/A                -3.60%
AIM V.I. International Equity                47.36%            N/A                20.72%
AIM V.I. Telecommunications and
     Technology                                N/A             N/A                  N/A
AIM V.I. Value                               22.57%            N/A                21.64%
</TABLE>

* The Variable Sub-Accounts commenced operations December 4, 1995, with the
exception of the AIM V.I. Aggressive Growth, Balanced, Capital Development and
High Yield Sub-Accounts which commenced operations on May 1, 1998 and the AIM
V.I. Blue Chip, Dent Demographic Trends, Global Growth and Income,and
Telecommunications and Technology Sub-Accounts commenced operations on January
3, 2000.

NON-STANDARDIZED TOTAL RETURNS

From time to time, we also may quote rates of return that reflect changes in the
<PAGE>

values of each Variable Sub-Account's accumulation units. We may quote these
"non-standardized total returns" on an annualized, cumulative, year by year or
other basis. These rates of return take into account asset-based charges, such
as the mortality and expense risk charge and administration charge. However,
these rates of return do not reflect withdrawal charges, contract maintenance
charges, or any taxes. Such charges, if reflected, would reduce the performance
shown.

Annualized returns reflect the rate of return that, when compounded annually,
would equal the cumulative rate of return for the period shown. We compute
annualized returns according to the following formula:

                      Annualized Return = (l + r) l/n -1

         Where r = cumulative rate of return for the period shown and
                 n =  number of years in the period

The method of computing annualized rates of return is similar to that for
computing standardized performance, described above, except rather than using a
hypothetical $1,000 investment and the ending redeemable value thereof, we use
the changes in value of an accumulation unit.

Cumulative rates of return reflect the cumulative change in value of an
accumulation unit over the period shown. Year-by-year rates of return reflect
the change in value of an accumulation unit during the course of each year
shown. We compute these returns by dividing the accumulation unit value at the
end of each period shown, by the accumulation unit value at the beginning of
that period, and subtracting one. We compute other total returns on a similar
basis.

We may quote non-standardized total returns for 1, 3, 5, and 10 year periods, or
period since inception of the Variable Sub-Account's operations, as well as
other periods, such as "year to date" (prior calendar year end to the day stated
in the advertisement); "year to most recent quarter" (prior to calendar year end
to the end of the most recent quarter); the prior calendar year; and the "n"
most recent calendar years.

The non standardized annualized total returns for the Variable Sub-Accounts for
the period ended December 31, 1999 are set out below. No non-standardized
annualized total returns are shown for the AIM V.I. Money Market Variable
Sub-Account. In addition, no non-standardized annualized total returns are shown
for the AIM V.I. Blue Chip, Dent Demographic Trends, Global Growth and Income,
and Telecommunications and Technology Variable Sub-Accounts which commenced
operations on January 3, 2000.

<TABLE>
<CAPTION>
                                                                                      10 Years or
                                                                                    Since Inception
Variable Sub-Account                                 One Year         Five Years      (if less)*
- --------------------                                 --------         ----------      ----------
<S>                                                   <C>                <C>            <C>
AIM V.I. Aggressive Growth                            42.59%             N/A            22.30%
AIM V.I. Balanced                                     17.59%             N/A            17.91%
AIM V.I. Blue Chip                                     N/A               N/A             N/A
AIM V.I. Capital Appreciation                         42.53%             N/A            20.49%
AIM V.I. Capital Development                          27.24%             N/A             9.62%
AIM V.I. Dent Demographic Trends                       N/A               N/A             N/A
AIM V.I. Diversified Income                           -3.33%             N/A             3.79%
AIM V.I. Global Growth and Income                      N/A               N/A             N/A
AIM V.I. Global Utilities                             31.64%             N/A            19.20%
AIM V.I. Government Securities                        -5.41%             N/A             2.80%
AIM V.I. Growth                                       33.29%             N/A            25.58%
AIM V.I. Growth & Income                              32.32%             N/A            24.18%
AIM V.I. High Yield                                    8.93%             N/A            -0.25%
AIM V.I. International Equity                         52.82%             N/A            21.27%
AIM V.I. Telecommunications and Technology             N/A               N/A             N/A
AIM V.I. Value                                        28.03%             N/A            22.18%
</TABLE>

*The inception dates of the Variable Sub-Accounts appear in the footnote to the
first table under "Standardized Total Returns."

ADJUSTED HISTORICAL TOTAL RETURNS

We may advertise the total return for periods prior to the date that the
Variable Sub-Accounts commenced operations. We will calculate such "adjusted
historical total returns" using the historical performance of the underlying
Funds and adjusting such performance to reflect the current level of charges
that apply to the Variable Sub-Accounts under the Contract, the contract
maintenance charge and the appropriate withdrawal charge.

The adjusted historical total returns for the Variable Sub-Accounts for the
periods ended December 31, 1999 are set out below. No adjusted historical total
returns are shown for the AIM V.I. Money Market Variable Sub-Account.
<PAGE>

<TABLE>
<CAPTION>
                                                                                      10 Years or
                                                                                     Since Inception
Variable Sub-Account                               One Year       Five Years           (if less)*
- --------------------                               --------       ----------           ----------
<S>                                                  <C>              <C>                <C>
AIM V.I. Aggressive Growth                           37.13%            N/A               19.37%
AIM V.I. Balanced                                    12.13%            N/A               14.92%
AIM V.I. Blue Chip                                     N/A             N/A                 N/A
AIM V.I. Capital Appreciation                        37.08%          23.43%              20.40%
AIM V.I. Capital Development                         21.79%            N/A                6.47%
AIM V.I. Dent Demographic Trends                       N/A             N/A                 N/A
AIM V.I. Diversified Income                          -8.79%           5.66%               4.03%
AIM V.I. Global Growth and Income                    -7.04%          11.13%               9.75%
AIM V.I. Global Utilities                            26.18%          19.72%              16.39%
AIM V.I. Government Securities                      -10.86%           4.15%               2.76%
AIM V.I. Growth                                      27.83%          27.47%              20.98%
AIM V.I. Growth & Income                             26.86%          26.01%              22.42%
AIM V.I. High Yield                                   3.48%            N/A               -3.60%
AIM V.I. International Equity                        47.36%          19.78%              16.91%
AIM V.I. Telecommunications and Technology           98.13%          31.44%              27.50%
AIM V.I. Value                                       22.57%          25.07%              21.13%
</TABLE>

* The inception dates of the Funds corresponding to the Variable Sub-Accounts
are as follows:

AIM V.I. Aggressive Growth Fund                    May 1, 1998
AIM V.I. Balanced Fund                             May 1, 1998
AIM V.I. Blue Chip                                 December 29, 1999
AIM V.I. Capital Appreciation Fund                 May 5, 1993
AIM V.I. Capital Development Fund                  May 1, 1998
AIM V.I. Dent Demographic Trends                   December 29, 1999
AIM V.I. Diversified Income Fund                   May 5, 1993
AIM V.I. Global Growth and Income                  February 12, 1993*
AIM V.I. Global Utilities Fund                     May 2, 1994
AIM V.I. Government Securities Fund                May 5, 1993
AIM V.I. Growth Fund                               May 5, 1993
AIM V.I. Growth & Income Fund                      May 2, 1994
AIM V.I. High Yield Fund                           May 1, 1998
AIM V.I. International Equity Fund                 May 5, 1993
AIM V.I. Telecommunications and Technology         October 18, 1993*
AIM V.I. Value Fund                                May 5, 1993

*The inception dates of the AIM V.I. Global Growth and Income and AIM V.I.
Telecommunications and Technology Funds ("AIM V.I. Funds") is October 15, 1999.
For periods prior to the inception dates of the AIM V.I. Funds, the performance
shown is based on the historical performance of the AIM G.T. Global Growth &
Income and AIM G.T. Telecommunications Funds, adjusted to reflect the current
expenses of the AIM V.I. Funds.

Calculation of Accumulation Unit Values

The value of Accumulation Units will change each Valuation Period according to
the investment performance of the Fund shares purchased by each Variable
Sub-Account and the deduction of certain expenses and charges. A "Valuation
Period" is the period from the end of one Valuation Date and continues to the
end of the next Valuation Date. A Valuation Date ends at the close of regular
trading on the New York Stock Exchange (currently 3:00 p.m. Central Time).

The Accumulation Unit Value of a Variable Sub-Account for any Valuation Period
equals the Accumulation Unit Value as of the immediately preceding Valuation
Period, multiplied by the Net Investment Factor (described below) for that
Sub-Account for the current Valuation Period.
<PAGE>

NET INVESTMENT FACTOR

The Net Investment Factor for a Valuation Period is a number representing the
change, since the last Valuation Period, in the value of Sub-account assets per
Accumulation Unit due to investment income, realized or unrealized capital gain
or loss, deductions for taxes, if any, and deductions for the mortality and
expense risk charge and administrative expense charge. We determine the Net
Investment Factor for each Variable Sub-Account for any Valuation Period by
dividing (A) by (B) and subtracting (C) from the result, where:

     (A) is the sum of:

     (1) the net  asset  value  per share of the Fund  underlying  the  Variable
     Sub-Account determined at the end of the current Valuation Period; plus,

     (2) the per share amount of any dividend or capital gain distributions made
     by the Fund underlying the Variable Sub-Account during the current
     Valuation Period;

     (B) is the net asset value per share of the Fund underlying the Variable
     Sub-Account determined as of the end of the immediately preceding Valuation
     Period; and

     (C) is the annualized mortality and expense risk and administrative expense
     charges divided by 365 and then multiplied by the number of calendar days
     in the current Valuation Period.

CALCULATION OF VARIABLE INCOME PAYMENTS

We calculate the amount of the first variable income payment under an Income
Plan by applying the Contract Value allocated to each Variable Sub-Account less
any applicable premium tax charge deducted at the time, to the income payment
tables in the Contract. We divide the amount of the first variable annuity
income payment by the Variable Sub-Account's then current Annuity Unit value to
determine the number of annuity units ("Annuity Units") upon which later income
payments will be based. To determine income payments after the first, we simply
multiply the number of Annuity Units determined in this manner for each Variable
Sub-Account by the then current Annuity Unit value ("Annuity Unit Value") for
that Variable Sub-Account.

CALCULATION OF ANNUITY UNIT VALUES

Annuity Units in each Variable Sub-Account are valued separately and Annuity
Unit Values will depend upon the investment experience of the particular Fund in
which the Variable Sub-Account invests. We calculate the Annuity Unit Value for
each Variable Sub-Account at the end of any Valuation Period by:

     . multiplying the Annuity Unit Value at the end of the immediately
       preceding Valuation Period by the Variable Sub-Account's Net
       Investment Factor (described in the preceding section) for the Period;
       and then

     . dividing the product by the sum of 1.0 plus the assumed investment
       rate for the Valuation Period.


The assumed investment rate adjusts for the interest rate assumed in the income
payment tables used to determine the dollar amount of the first variable income
payment, and is at an effective annual rate which is disclosed in the Contract.

We determine the amount of the first variable income payment paid under an
Income Plan using the income payment tables set out in the Contracts. The
Contracts include tables that differentiate on the basis of sex, except in
states that require the use of unisex tables.

GENERAL MATTERS

INCONTESTABILITY

We will not contest the Contract after we issue it.

SETTLEMENTS

We may require that your Contract be returned to us prior to any settlement. We
must receive due proof of the Contract owner(s) death (or Annuitant's death if
there is a non-natural Contract owner) before we will settle a death claim.

SAFEKEEPING OF THE VARIABLE ACCOUNT'S ASSETS

We hold title to the assets of the Variable Account. We keep the assets
physically segregated and separate and apart from our general corporate assets.
We maintain records of all purchases and redemptions of the Fund shares held by
each of the Variable Sub-Accounts.

The Funds do not issue stock certificates. Therefore, we hold the Variable
Account's assets in open account in lieu of stock certificates. See the Funds'
prospectuses for a more complete description of the custodian of the Funds.

PREMIUM TAXES
<PAGE>

Applicable premium tax rates depend on the Contract owner's state of residency
and the insurance laws and our status in those states where premium taxes are
incurred. Premium tax rates may be changed by legislation, administrative
interpretations, or judicial acts.

TAX RESERVES

We do not establish capital gains tax reserves for any Variable Sub-Account nor
do we deduct charges for tax reserves because we believe that capital gains
attributable to the Variable Account will not be taxable. However, we reserve
the right to deduct charges to establish tax reserves for potential taxes on
realized or unrealized capital gains.
<PAGE>

FEDERAL TAX MATTERS

THE FOLLOWING DISCUSSION IS GENERAL AND IS NOT INTENDED AS TAX ADVICE. WE MAKE
NO GUARANTEE REGARDING THE TAX TREATMENT OF ANY CONTRACT OR TRANSACTION
INVOLVING A CONTRACT.

Federal, state, local and other tax consequences of ownership or receipt of
distributions under an annuity contract depend on the individual circumstances
of each person. If you are concerned about any tax consequences with regard to
your individual circumstances, you should consult a competent tax adviser.

TAXATION OF GLENBROOK LIFE AND ANNUITY COMPANY

Glenbrook is taxed as a life insurance company under Part I of Subchapter L of
the Internal Revenue Code. Since the Variable Account is not an entity separate
from Glenbrook, and its operations form a part of Glenbrook, it will not be
taxed separately as a "Regulated Investment Company" under Subchapter M of the
Code. Investment income and realized capital gains of the Variable Account are
automatically applied to increase reserves under the contract. Under existing
federal income tax law, Glenbrook believes that the Variable Account investment
income and capital gains will not be taxed to the extent that such income and
gains are applied to increase the reserves under the contract. Accordingly,
Glenbrook does not anticipate that it will incur any federal income tax
liability attributable to the Variable Account, and therefore Glenbrook does not
intend to make provisions for any such taxes. If Glenbrook is taxed on
investment income or capital gains of the Variable Account, then Glenbrook may
impose a charge against the Variable Account in order to make provision for such
taxes.

EXCEPTIONS TO THE NON-NATURAL OWNER RULE

There are several exceptions to the general rule that annuity contracts held by
a non-natural owner are not treated as annuity contracts for federal income tax
purposes. Contracts will generally be treated as held by a natural person if the
nominal owner is a trust or other entity which holds the Contract as agent for a
natural person. However, this special exception will not apply in the case of an
employer who is the nominal owner of an annuity contract under a non-qualified
deferred compensation arrangement for its employees. Other exceptions to the
non-natural owner rule are: (1) contracts acquired by an estate of a decedent by
reason of the death of the decedent; (2) certain qualified contracts; (3)
contracts purchased by employers upon the termination of certain qualified
plans; (4) certain contracts used in connection with structured settlement
agreements, and (5) contracts purchased with a single premium when the annuity
starting date is no later than a year from purchase of the annuity and
substantially equal periodic payments are made, not less frequently than
annually, during the annuity period.

IRS REQUIRED DISTRIBUTION AT DEATH RULES

In order to be considered an annuity contract for federal income tax purposes,
an annuity contract must provide: (1) if any owner dies on or after the annuity
start date but before the entire interest in the contract has been distributed,
the remaining portion of such interest must be distributed at least as rapidly
as under the method of distribution being used as of the date of the owner's
death; (2) if any owner dies prior to the annuity start date, the entire
interest in the contract will be distributed within five years after the date of
the owner's death. These requirements are satisfied if any portion of the
owner's interest which is payable to (or for the benefit of) a designated
beneficiary is distributed over the life of such beneficiary (or over a period
not extending beyond the life expectancy of the beneficiary) and the
distributions begin within one year of the owner's death. If the owner's
designated beneficiary is the surviving spouse of the owner, the contract may be
continued with the surviving spouse as the new owner. If the owner of the
contract is a non-natural person, then the annuitant will be treated as the
owner for purposes of applying the distribution at death rules. In addition, a
change in the annuitant on a contract owned by a non-natural person will be
treated as the death of the owner.
<PAGE>

QUALIFIED PLANS

The Contract may be used with several types of qualified plans. The income on
qualified plan and IRA investments is tax deferred and variable annuities held
by such plans do not receive any additional tax deferral. You should review the
annuity features, including all benefits and expenses, prior to purchasing a
variable annuity in a qualified plan or IRA. Glenbrook reserves the right to
limit the availability of the Contract for use with any of the Qualified Plans
listed below.

The tax rules applicable to participants in such qualified plans vary according
to the type of plan and the terms and conditions of the plan itself. Adverse tax
consequences may result from excess contributions, premature distributions,
distributions that do not conform to specified commencement and minimum
distribution rules, excess distributions and in other circumstances. Contract
owners and participants under the plan and annuitants and beneficiaries under
the Contract may be subject to the terms and conditions of the plan regardless
of the terms of the Contract.

INDIVIDUAL RETIREMENT ANNUITIES

Section 408 of the Code permits eligible individuals to contribute to an
individual retirement program known as an Individual Retirement Annuity (IRA).
Individual Retirement Annuities are subject to limitations on the amount that
can be contributed and on the time when distributions may commence. Certain
distributions from other types of qualified plans may be "rolled over" on a
tax-deferred basis into an Individual Retirement Annuity. An IRA generally may
not provide life insurance, but it may provide a death benefit that equals the
greater of the premiums paid and the Contract's Cash Value. The Contract
provides a death benefit that in certain circumstances may exceed the greater of
the payments and the Contract Value. It is possible that the death benefit could
be viewed as violating the prohibition on investment in life insurance contracts
with the result that the Contract would not be viewed as satisfying the
requirements of an IRA.

ROTH INDIVIDUAL RETIREMENT ANNUITIES

Section 408A of the Code permits eligible individuals to make nondeductible
contributions to an individual retirement program known as a Roth Individual
Retirement Annuity. Roth Individual Retirement Annuities are subject to
limitations on the amount that can be contributed and on the time when
distributions may commence. "Qualified distributions" from Roth Individual
Retirement Annuities are not includible in gross income. "Qualified
distributions" are any distributions made more than five taxable years after the
taxable year of the first contribution to the Roth Individual Retirement
Annuity, and which are made on or after the date the individual attains age 59
1/2, made to a beneficiary after the owner's death, attributable to the owner
being disabled or for a first time home purchase (first time home purchases are
subject to a lifetime limit of $10,000). "Nonqualified distributions" are
treated as made from contributions first and are includible in gross income to
the extent such distributions exceed the contributions made to the Roth
Individual Retirement Annuity. The taxable portion of a "nonqualified
distribution" may be subject to the 10% penalty tax on premature distributions.
Subject to certain limitations, a traditional Individual Retirement Account or
Annuity may be converted or "rolled over" to a Roth Individual Retirement
Annuity. The taxable portion of a conversion or rollover distribution is
includible in gross income, but is exempted from the 10% penalty tax on
premature distributions.

SIMPLIFIED EMPLOYEE PENSION PLANS

Section 408(k) of the Code allows employers to establish simplified employee
pension plans for their employees using the employees' individual retirement
annuities if certain criteria are met. Under these plans the employer may,
within specified limits, make deductible contributions on behalf of the
employees to their individual retirement annuities. Employers intending to use
the Contract in connection with such plans should seek competent advice. In
particular, employers should consider that an IRA generally may not provide life
insurance, but it may provide a death benefit that equals the greater of the
premiums paid and the contract's cash value. The Contract provides a death
benefit that in certain circumstances may exceed the greater of the payments and
the Contract Value.

SAVINGS INCENTIVE MATCH PLANS FOR EMPLOYEES (SIMPLE PLANS)

Sections 408(p) and 401(k) of the Code allow employers with 100 or fewer
employees to establish SIMPLE retirement plans for their employees. SIMPLE plans
may be structured as a SIMPLE retirement account using an employee's IRA to hold
the assets or as a Section 401(k) qualified cash or deferred arrangement. In
general, a SIMPLE plan consists of a salary deferral program for eligible
employees and matching or nonelective contributions made by employers. Employers
intending to use the Contract in conjunction with SIMPLE plans should seek
competent tax and legal advice.

TAX SHELTERED ANNUITIES

Section 403(b) of the Code permits public school employees and employees of
certain types of tax-exempt organizations (specified in Section 501(c)(3) of the
Code) to have their employers purchase annuity contracts for them, and subject
to certain limitations, to exclude the purchase payments from the employees'
<PAGE>

gross income. An annuity contract used for a Section 403(b) plan must provide
that distributions attributable to salary reduction contributions made after
12/31/88, and all earnings on salary reduction contributions, may be made only
on or after the date the employee attains age 59 1/2, separates from service,
dies, becomes disabled or on the account of hardship (earnings on salary
reduction contributions may not be distributed for hardship). These limitations
do not apply to withdrawals where Glenbrook is directed to transfer some or all
of the Contract Value to another 403(b) plan.

CORPORATE AND SELF-EMPLOYED PENSION AND PROFIT SHARING PLANS

Sections 401(a) and 403(a) of the Code permit corporate employers to establish
various types of tax favored retirement plans for employees. The Self-Employed
Individuals Retirement Act of 1962, as amended, (commonly referred to as "H.R.
10" or "Keogh") permits self-employed individuals to establish tax favored
retirement plans for themselves and their employees. Such retirement plans may
permit the purchase of annuity contracts in order to provide benefits under the
plans.

STATE AND LOCAL  GOVERNMENT AND TAX-EXEMPT  ORGANIZATION  DEFERRED  COMPENSATION
PLANS

Section 457 of the Code permits employees of state and local governments and
tax-exempt organizations to defer a portion of their compensation without paying
current taxes. The employees must be participants in an eligible deferred
compensation plan. To the extent the Contracts are used in connection with an
eligible plan, employees are considered general creditors of the employer and
the employer as owner of the contract has the sole right to the proceeds of the
contract. Generally, under the non-natural owner rules, such Contracts are not
treated as annuity contracts for federal income tax purposes. Under these plans,
contributions made for the benefit of the employees will not be includible in
the employees' gross income until distributed from the plan. However, under a
Section 457 plan all the compensation deferred under the plan must remain solely
the property of the employer, subject only to the claims of the employer's
general creditors, until such time as made available to the employee or a
beneficiary.
<PAGE>

EXPERTS

The financial statements and related financial statement schedule of Glenbrook
Life and Annuity Company as of December 31, 1999 and 1998 and for each of the
three years in the period ended December 31, 1999 that appear in this Statement
of Additional Information have been audited by Deloitte & Touche LLP,
independent auditors, as stated in their report appearing herein, and are
included in reliance upon the report of such firm given upon their authority as
experts in accounting and auditing.

The financial statements of the Variable Account as of December 31, 1999, and
for each of the periods in the two years then ended that appear in this
Statement of Additional Information have been audited by Deloitte & Touche LLP,
independent auditors, as stated in their report appearing herein, and are
included in reliance upon the report of such firm given upon their authority as
experts in accounting and auditing.


FINANCIAL STATEMENTS

The financial statements of the Variable Account as of December 31, 1999 and for
the periods in the two years then ended, the financial statements and related
financial statement schedule of Glenbrook Life as of December 31, 1999 and 1998
and for each of the three years in the period ended December 31, 1999 and the
accompanying Independent Auditors' Reports appear in the pages that follow. The
financial statements of the Glenbrook Life included herein should be considered
only as bearing upon the ability of Glenbrook Life to meet its obligations under
the Contacts.
<PAGE>

INDEPENDENT AUDITORS' REPORT


TO THE BOARD OF DIRECTORS AND SHAREHOLDER OF
GLENBROOK LIFE AND ANNUITY COMPANY:

We have audited the accompanying Statements of Financial Position of Glenbrook
Life and Annuity Company (the "Company", an affiliate of The Allstate
Corporation) as of December 31, 1999 and 1998, and the related Statements of
Operations and Comprehensive Income, Shareholder's Equity and Cash Flows for
each of the three years in the period ended December 31, 1999. Our audits also
included Schedule IV - Reinsurance. These financial statements and financial
statement schedule are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements and
financial statement schedule based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such financial statements present fairly, in all material
respects, the financial position of the Company as of December 31, 1999 and
1998, and the results of its operations and its cash flows for each of the three
years in the period ended December 31, 1999 in conformity with generally
accepted accounting principles. Also, in our opinion, Schedule IV - Reinsurance,
when considered in relation to the basic financial statements taken as a whole,
presents fairly, in all material respects, the information set forth therein.




/s/ Deloitte & Touche LLP

Chicago, Illinois
February 25, 2000
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                       STATEMENTS OF FINANCIAL POSITION

<TABLE>
<CAPTION>
                                                                            DECEMBER 31,
                                                                    --------------------------
                                                                      1999             1998
                                                                    ---------      -----------
($ in thousands, except par value data)

<S>                                                                 <C>            <C>
ASSETS
Investments
   Fixed income securities, at fair value
      (amortized cost $94,173 and $87,415 )                         $    92,937    $    94,313
   Short-term                                                            53,063          4,663
                                                                    -----------    -----------
         Total investments                                              146,000         98,976

Cash                                                                          9             --
Reinsurance recoverable from
   Allstate Life Insurance Company                                    4,144,165      3,113,278
Deferred income taxes                                                       293             --
Other assets                                                              2,706          2,590
Separate Accounts                                                     1,541,756        993,622
                                                                    -----------    -----------
         TOTAL ASSETS                                               $ 5,834,929    $ 4,208,466
                                                                    ===========    ===========

LIABILITIES
Reserve for life-contingent contract benefits                       $       800    $        --
Contractholder funds                                                  4,143,365      3,113,278
Current income taxes payable                                              2,360          2,181
Deferred income taxes                                                        --          2,499
Payable to affiliates, net                                                4,122          3,583
Separate Accounts                                                     1,541,756        993,622
                                                                    -----------    -----------
         TOTAL LIABILITIES                                            5,692,403      4,115,163
                                                                    -----------    -----------
COMMITMENTS AND CONTINGENT LIABILITIES (NOTE 11)

SHAREHOLDER'S EQUITY
Common stock, $500 par value, 10,000 and
    4,200 shares authorized, 5,000 and
    4,200 shares issued
    and outstanding                                                       2,500          2,100
Additional capital paid-in                                              119,241         69,641
Retained income                                                          21,588         17,079

Accumulated other comprehensive (loss) income:
    Unrealized net capital (losses) gains                                  (803)         4,483
                                                                    -----------    -----------
         TOTAL ACCUMULATED OTHER COMPREHENSIVE
             (LOSS) INCOME                                                 (803)         4,483
                                                                    -----------    -----------
         TOTAL SHAREHOLDER'S EQUITY                                     142,526         93,303
                                                                    -----------    -----------
         TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY                 $ 5,834,929    $ 4,208,466
                                                                    ===========    ===========
</TABLE>

See notes to financial statements.

                                       2
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                           STATEMENTS OF OPERATIONS
                           AND COMPREHENSIVE INCOME

<TABLE>
<CAPTION>

                                                                   YEAR ENDED DECEMBER 31,
                                                               -----------------------------
($ in thousands)                                                 1999      1998       1997
                                                               -------    -------    -------
<S>                                                            <C>        <C>        <C>
REVENUES
Net investment income                                          $ 6,579    $ 6,231    $ 5,304
Realized capital gains and losses                                  312         (5)     3,460
                                                               -------    -------    -------

INCOME FROM OPERATIONS
    BEFORE INCOME TAX EXPENSE                                    6,891      6,226      8,764
Income tax expense                                               2,382      2,182      3,078
                                                               -------    -------    -------

NET INCOME                                                       4,509      4,044      5,686
                                                               -------    -------    -------

OTHER COMPREHENSIVE (LOSS) INCOME, AFTER-TAX
Change in unrealized net capital gains and losses               (5,286)     1,315        378
                                                               -------    -------    -------

COMPREHENSIVE (LOSS) INCOME                                    $  (777)   $ 5,359    $ 6,064
                                                               =======    =======    =======
</TABLE>

See notes to financial statements.

                                       3
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                      STATEMENTS OF SHAREHOLDER'S EQUITY

<TABLE>
<CAPTION>

                                                                           DECEMBER 31,
                                                                ----------------------------------
                                                                   1999         1998       1997
                                                                ---------    ---------   ---------
($ in thousands)

<S>                                                             <C>          <C>         <C>
COMMON STOCK
Balance, beginning of year                                      $   2,100    $   2,100   $   2,100
Issuance of new shares of stock                                       400           --          --
                                                                ---------    ---------   ---------
Balance, end of year                                                2,500        2,100       2,100
                                                                ---------    ---------   ---------
ADDITIONAL CAPITAL PAID-IN
Balance, beginning of year                                      $  69,641    $  69,641   $  69,641
Capital contribution                                               49,600           --          --
                                                                ---------    ---------   ---------
Balance, end of year                                              119,241       69,641      69,641
                                                                ---------    ---------   ---------

RETAINED INCOME
Balance, beginning of year                                      $  17,079    $  13,035   $   7,349
Net income                                                          4,509        4,044       5,686
                                                                ---------    ---------   ---------
Balance, end of year                                               21,588       17,079      13,035
                                                                ---------    ---------   ---------
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
Balance, beginning of year                                      $   4,483    $   3,168   $   2,790
Change in unrealized net capital gains
    and losses                                                     (5,286)       1,315         378
                                                                ---------    ---------   ---------
Balance, end of year                                                 (803)       4,483       3,168
                                                                ---------    ---------   ---------
TOTAL SHAREHOLDER'S EQUITY                                      $ 142,526    $  93,303   $  87,944
                                                                =========    =========   =========
</TABLE>


See notes to financial statements.

                                       4

<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                           STATEMENTS OF CASH FLOWS


<TABLE>
<CAPTION>
                                                                              YEAR ENDED DECEMBER 31,
                                                                         --------------------------------
($ in thousands)                                                           1999        1998        1997
                                                                         --------    --------    --------
<S>                                                                      <C>         <C>         <C>
CASH FLOWS FROM OPERATING ACTIVITIES
Net income                                                               $  4,509    $  4,044    $  5,686
Adjustments to reconcile net income to net cash
    provided by operating activities
         Amortization and other non-cash items                                (65)        (24)         29
         Realized capital gains and losses                                   (312)          5      (3,460)
         Changes in:
              Income taxes payable                                            235       1,590         240
              Other operating assets and liabilities                          264         915         961
                                                                         --------    --------    --------
                 Net cash provided by operating activities                  4,631       6,530       3,456
                                                                         --------    --------    --------

CASH FLOWS FROM INVESTING ACTIVITIES
Fixed income securities
       Proceeds from sales                                                  9,049       1,966       1,405
       Investment collections                                               4,945       7,123      14,217
       Investment purchases                                               (20,328)    (15,250)    (50,115)
Participation in Separate accounts                                             --          --      13,981
Change in short-term investments, net                                     (48,288)       (369)     (2,944)
                                                                         --------    --------    --------
               Net cash used in investing activities                      (54,622)     (6,530)    (23,456)
                                                                         --------    --------    --------

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common stock                                        400          --          --
Capital contribution                                                       49,600          --      20,000
                                                                         --------    --------    --------
           Net cash provided by financing activities                       50,000          --      20,000
                                                                         --------    --------    --------


NET INCREASE IN CASH                                                            9          --          --
CASH AT THE BEGINNING OF YEAR                                                  --          --          --
                                                                         --------    --------    --------
CASH AT END OF YEAR                                                      $      9    $     --      $   --
                                                                         ========    ========    ========
</TABLE>

See notes to financial statements.

                                       5
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)


1. GENERAL

BASIS OF PRESENTATION
The accompanying financial statements include the accounts of Glenbrook Life and
Annuity Company (the "Company"), a wholly owned subsidiary of Allstate Life
Insurance Company ("ALIC"), which is wholly owned by Allstate Insurance Company
("AIC"), a wholly owned subsidiary of The Allstate Corporation (the
"Corporation"). These financial statements have been prepared in conformity with
generally accepted accounting principles.

NATURE OF OPERATIONS
The Company markets savings and life insurance products through banks and
securities firms. Savings products include deferred annuities and immediate
annuities without life contingencies. Deferred annuities include fixed rate,
market value adjusted, indexed and variable annuities. Life insurance consists
of interest-sensitive life and variable life insurance. In 1999, substantially
all of the Company's statutory premiums and deposits were from annuities.

Annuity contracts and life insurance policies issued by the Company are subject
to discretionary surrender or withdrawal by customers, subject to applicable
surrender charges. These policies and contracts are reinsured primarily with
ALIC (see Note 3), which invests premiums and deposits to provide cash flows
that will be used to fund future benefits and expenses.

The Company monitors economic and regulatory developments which have the
potential to impact its business. Recently enacted federal legislation will
allow for banks and other financial organizations to have greater participation
in the securities and insurance businesses. This legislation may present an
increased level of competition for sales of the Company's products. Furthermore,
the market for deferred annuities and interest-sensitive life insurance is
enhanced by the tax incentives available under current law. Any legislative
changes which lessen these incentives are likely to negatively impact the demand
for these products.

Additionally, traditional demutualizations of mutual insurance companies and
enacted and pending state legislation to permit mutual insurance companies to
convert to a hybrid structure known as a mutual holding company could have a
number of significant effects on the Company by (1) increasing industry
competition through consolidation caused by mergers and acquisitions related to
the new corporate form of business; and (2) increasing competition in the
capital markets.

Although the Company currently benefits from agreements with financial services
entities who market and distribute its products, change in control of these
non-affiliated entities with which the Company has alliances could negatively
impact the Company's sales.

The Company is authorized to sell life and savings products in all states except
New York, as well as in the District of Columbia. The top geographic locations
for statutory premiums and deposits for the Company were Florida, California,
Pennsylvania, Michigan, Texas, Illinois and New Jersey for the year ended
December 31, 1999. No other jurisdiction accounted for more than 5% of statutory
premiums and deposits. Substantially all premiums and deposits are ceded to ALIC
under reinsurance agreements.

                                       6
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)



2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

INVESTMENTS
Fixed income securities include bonds and mortgage-backed securities. All fixed
income securities are carried at fair value and may be sold prior to their
contractual maturity ("available for sale"). The difference between amortized
cost and fair value, net of deferred income taxes, is reflected as a component
of shareholder's equity. Provisions are recognized for declines in the value of
fixed income securities that are other than temporary. Such writedowns are
included in realized capital gains and losses. Short-term investments are
carried at cost or amortized cost, which approximates fair value.

Investment income consists primarily of interest and short-term investment
dividends. Interest is recognized on an accrual basis and dividends are recorded
at the ex-dividend date. Interest income on mortgage-backed securities is
determined on the effective yield method, based on the estimated principal
repayments. Accrual of income is suspended for fixed income securities that are
in default or when the receipt of interest payments is in doubt. Realized
capital gains and losses are determined on a specific identification basis.

REINSURANCE RECOVERABLE
The Company has reinsurance agreements whereby substantially all contract
charges, credited interest, policy benefits and certain expenses are ceded to
ALIC. Such amounts are reflected net of such reinsurance in the statements of
operations and comprehensive income. Investment income earned on the assets
which support contractholder funds and the reserve for life-contingent contract
benefits is not included in the Company's financial statements as those assets
are owned and managed under terms of reinsurance agreements. Reinsurance
recoverable and the related reserve for life-contingent contract benefits and
contractholder funds are reported separately in the statements of financial
position. The Company continues to have primary liability as the direct insurer
for risks reinsured.

RECOGNITION OF INSURANCE REVENUE AND RELATED BENEFITS AND INTEREST CREDITED
Interest-sensitive life contracts are insurance contracts whose terms are not
fixed and guaranteed. The terms that may be changed include premiums paid by the
contractholder, interest credited to the contractholder account balance and one
or more amounts assessed against the contractholder. Premiums from these
contracts are reported as deposits to contractholder funds. Contract charge
revenue consists of fees assessed against the contractholder account balance for
cost of insurance (mortality risk), contract administration and surrender
charges. Contract benefits include interest credited to contracts and claims
incurred in excess of the related contractholder account balance.

Contracts that do not subject the Company to significant risk arising from
mortality or morbidity are referred to as investment contracts. Fixed rate
annuities, market value adjusted annuities, indexed annuities and immediate
annuities without life contingencies are considered investment contracts.
Deposits received for such contracts are reported as deposits to contractholder
funds. Contract charge revenue for investment contracts consists of charges
assessed against the contractholder account balance for contract administration
and surrenders. Contract benefits include interest credited and claims incurred
in excess of the related contractholder account balance.

                                       7
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)



Crediting rates for fixed rate and interest-sensitive life contracts are
adjusted periodically by the Company to reflect current market conditions.
Crediting rates for indexed annuities are based on an interest rate index, such
as LIBOR or an equity index, such as the S&P 500.

Investment contracts include variable annuity and variable life contracts which
are sold as Separate Accounts products. The assets supporting these products are
legally segregated and available only to settle Separate Accounts contract
obligations. Deposits received are reported as Separate Accounts liabilities.
The Company's contract charge revenue for these contracts consists of charges
assessed against the Separate Accounts fund balances for contract maintenance,
administration, mortality, expense and surrenders.

All contract charges, contract benefits and interest credited are reinsured.

INCOME TAXES
The income tax provision is calculated under the liability method and presented
net of reinsurance. Deferred tax assets and liabilities are recorded based on
the difference between the financial statement and tax bases of assets and
liabilities at the enacted tax rates. Deferred income taxes arise primarily from
unrealized capital gains and losses on fixed income securities carried at fair
value and differences in the tax bases of investments.

SEPARATE ACCOUNTS
The Company issues deferred variable annuity and variable life contracts, the
assets and liabilities of which are legally segregated and recorded as assets
and liabilities of the Separate Accounts. Absent any contract provisions wherein
the Company contractually guarantees either a minimum return or account value to
the beneficiaries of the contractholders in the form of a death benefit, the
contractholders bear the investment risk that the Separate Accounts' funds may
not meet their stated objectives.

The assets of the Separate Accounts are carried at fair value. Separate Accounts
liabilities represent the contractholders' claim to the related assets and are
carried at the fair value of the assets. In the event that the asset value of
certain contractholder accounts are projected to be below the value guaranteed
by the Company, a liability is established through a charge to earnings.
Investment income and realized capital gains and losses of the Separate Accounts
accrue directly to the contractholders and therefore, are not included in the
Company's statements of operations and comprehensive income. Revenues to the
Company from the Separate Accounts consist of contract maintenance and
administration fees, and mortality, surrender and expense charges.

Prior to 1998, the Company had an ownership interest ("Participation") in the
Separate Accounts. The Company's Participation was carried at fair value and
unrealized gains and losses, net of deferred income taxes, were shown as a
component of shareholder's equity. Investment income and realized capital gains
and losses which arose from the Participation were included in the Company's
statements of operations and comprehensive income. The Company liquidated its
Participation during 1997, which resulted in a pretax realized capital gain of
$3.5 million.

                                       8
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)



RESERVE FOR LIFE-CONTINGENT CONTRACT BENEFITS
The reserve for life-contingent contract benefits, which relates to certain
variable annuity contract guarantees, is computed on the basis of assumptions as
to mortality, future investment yields, terminations and expenses at the time
the policy is issued. These assumptions include provisions for adverse deviation
and generally vary by such characteristics as type of coverage, year of issue
and policy duration. Detailed reserve assumptions and reserve interest rates are
outlined in Note 6.

CONTRACTHOLDER FUNDS
Contractholder funds arise from the issuance of interest-sensitive life and
certain investment contracts. Deposits received are recorded as interest-bearing
liabilities. Contractholder funds are equal to deposits received, net of
commissions, and interest credited to the benefit of the contractholder less
withdrawals, mortality charges, and administrative expenses. Detailed
information on crediting rates and surrender and withdrawal protection on
contractholder funds are outlined in Note 6.

USE OF ESTIMATES
The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial statements and accompanying notes.
Actual results could differ from those estimates.

NEW ACCOUNTING STANDARDS
In 1999, the Company adopted Statement of Position ("SOP") 97-3, "Accounting by
Insurance and Other Enterprises for Insurance-Related Assessments." The SOP
provides guidance concerning when to recognize a liability for insurance-related
assessments and how those liabilities should be measured. Specifically,
insurance-related assessments should be recognized as liabilities when all of
the following criteria have been met: 1) an assessment has been imposed or it is
probable that an assessment will be imposed, 2) the event obligating an entity
to pay an assessment has occurred and 3) the amount of the assessment can be
reasonably estimated. Adoption of this statement was not material to the
Company's results of operations or financial position.

                                       9
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)


3. RELATED PARTY TRANSACTIONS

REINSURANCE
The Company has reinsurance agreements whereby substantially all contract
charges, credited interest, policy benefits and certain expenses are ceded to
ALIC and reflected net of such reinsurance in the statements of operations and
comprehensive income. Reinsurance recoverable and the related reserve for
life-contingent contract benefits and contractholder funds are reported
separately in the statements of financial position. The Company continues to
have primary liability as the direct insurer for risks reinsured.

Investment income earned on the assets which support contractholder funds and
the reserve for life-contingent contract benefits is not included in the
Company's financial statements as those assets are owned and managed under terms
of reinsurance agreements. The following amounts were ceded to ALIC under
reinsurance agreements.

<TABLE>
<CAPTION>
                                                   YEAR ENDED DECEMBER 31,
                                                   -----------------------
                                                  1999       1998      1997
                                               --------   --------   --------
<S>                                            <C>        <C>        <C>
Contract charges                               $ 27,175   $ 19,009   $ 11,641
Credited interest, policy benefits,
   and certain expenses                         253,945    218,008    179,954

</TABLE>

BUSINESS OPERATIONS
The Company utilizes services performed by AIC and ALIC and business facilities
owned or leased, and operated by AIC in conducting its business activities. The
Company reimburses AIC and ALIC for the operating expenses incurred on behalf of
the Company. The Company is charged for the cost of these operating expenses
based on the level of services provided. Operating expenses, including
compensation and retirement and other benefit programs, allocated to the Company
were $26,555, $15,949, and $19,243 in 1999, 1998 and 1997, respectively. Of
these costs, the Company retains investment related expenses. All other costs
are ceded to ALIC under reinsurance agreements.

                                      10
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)


4. INVESTMENTS

FAIR VALUES
The amortized cost, gross unrealized gains and losses, and fair value for fixed
income securities are as follows:

<TABLE>
<CAPTION>

                                                             GROSS UNREALIZED
                                               AMORTIZED     ----------------     FAIR
                                                 COST         GAINS    LOSSES     VALUE
                                               ---------     -------   -------    ------

<S>                                             <C>          <C>       <C>        <C>
AT DECEMBER 31, 1999
U.S. government and agencies                    $24,274      $ 1,260   $     -    $25,534
Municipal                                         1,656            -      (112)     1,544
Corporate                                        49,255            9    (2,022)    47,242
Mortgage-backed securities                       18,988           96      (467)    18,617
                                                -------      -------   -------    -------
     Total fixed income securities              $94,173      $ 1,365   $(2,601)   $92,937
                                                =======      =======   =======    =======

AT DECEMBER 31, 1998
U.S. government and agencies                    $24,350      $ 4,308   $     -    $28,658
Municipal                                           656           24         -        680
Corporate                                        33,009        1,575       (39)    34,545
Mortgage-backed securities                       29,400        1,047       (17)    30,430
                                                -------      -------   -------    -------
     Total fixed income securities              $87,415      $ 6,954   $   (56)   $94,313
                                                =======      =======   =======    =======
</TABLE>


SCHEDULED MATURITIES
The scheduled maturities for fixed income securities are as follows at December
31, 1999:

<TABLE>
<CAPTION>

                                                                  AMORTIZED      FAIR
                                                                    COST        VALUE
                                                                  ---------  -----------
<S>                                                               <C>         <C>
Due after one year through five years                             $  30,974   $   31,085
Due after five years through ten years                               32,583       30,911
Due after ten years                                                  11,628       12,324
                                                                  ---------   ----------
                                                                     75,185       74,320
Mortgage-backed securities                                           18,988       18,617
                                                                  ---------   ----------
   Total                                                          $  94,173   $   92,937
                                                                  =========   ==========
</TABLE>

Actual maturities may differ from those scheduled as a result of prepayments by
the issuers.

<TABLE>
<CAPTION>

NET INVESTMENT INCOME
YEAR ENDED DECEMBER 31,                                        1999     1998     1997
                                                              ------   ------   ------
<S>                                                           <C>      <C>      <C>
Fixed income securities                                       $6,458   $6,151   $5,014
Short-term investments                                           230      183      231
Participation in Separate Accounts                              --       --        161
                                                              ------   ------   ------
    Investment income, before expense                          6,688    6,334    5,406
    Investment expense                                           109      103      102
                                                              ------   ------   ------
    Net investment income                                     $6,579   $6,231   $5,304
                                                              ======   ======   ======
</TABLE>

                                      11
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)

<TABLE>
<CAPTION>
REALIZED CAPITAL GAINS AND LOSSES
YEAR ENDED DECEMBER 31,                                    1999        1998      1997
                                                        ---------   ---------  --------
<S>                                                      <C>        <C>        <C>
Fixed income securities                                  $   312    $    (5)   $   (61)
Short-term investments                                        --         --          6

Participation in Separate Accounts                            --         --      3,515
                                                        --------    --------   --------
     Realized capital gains and losses                       312         (5)     3,460
     Income taxes                                           (109)         2     (1,211)
                                                        ---------   ---------  --------
     Realized capital gains and
        losses, after tax                                $   203    $    (3)   $ 2,249
                                                        =========   =========  =======
</TABLE>

Excluding calls and prepayments, gross gains of $370 were realized on sales of
fixed income securities during 1999, and gross losses of $58, $5 and $61 were
realized on sales of fixed income securities during 1999, 1998 and 1997,
respectively. There were no gross gains realized on sales of fixed income
securities during 1998 and 1997.

UNREALIZED NET CAPITAL GAINS AND LOSSES
Unrealized net capital losses on fixed income securities included in
shareholder's equity at December 31, 1999 are as follows:

<TABLE>
<CAPTION>

                                            COST/              FAIR           GROSS UNREALIZED       UNREALIZED
                                        AMORTIZED COST         VALUE         GAINS       LOSSES      NET LOSSES
                                        --------------       --------       -------     -------      ----------
<S>                                     <C>                 <C>            <C>         <C>            <C>
Fixed income securities                    $ 94,173         $ 92,937       $ 1,365     $(2,601)       $(1,236)
                                           =========        ========       =======     =======
 Deferred income taxes                                                                                    433
                                                                                                      -------
 Unrealized net capital losses                                                                        $  (803)
                                                                                                      =======
</TABLE>

<TABLE>
<CAPTION>

CHANGE IN UNREALIZED NET CAPITAL GAINS AND LOSSES
YEAR ENDED DECEMBER 31,                                                         1999         1998        1997
                                                                               -------     --------    -------
<S>                                                                           <C>         <C>         <C>
Fixed income securities                                                       $(8,134)    $ 2,024     $ 2,410
Participation in Separate Accounts                                               --          --        (1,829)
Deferred income taxes                                                           2,848        (709)       (203)
                                                                              -------     -------     -------
(Decrease) increase in unrealized net
    capital gains                                                             $(5,286)    $ 1,315     $   378
                                                                              =======     =======     =======
</TABLE>

SECURITIES ON DEPOSIT
At December 31, 1999, fixed income securities with a carrying value of $10,346
were on deposit with regulatory authorities as required by law.

                                       12
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)


5.   FINANCIAL INSTRUMENTS

In the normal course of business, the Company invests in various financial
assets and incurs various financial liabilities. The fair value estimates of
financial instruments presented below are not necessarily indicative of the
amounts the Company might pay or receive in actual market transactions.
Potential taxes and other transaction costs have not been considered in
estimating fair value. The disclosures that follow do not reflect the fair value
of the Company as a whole since a number of the Company's significant assets
(including reinsurance recoverable and deferred income taxes) and liabilities
(including interest-sensitive life insurance reserves) are not considered
financial instruments and are not carried at fair value. Other assets and
liabilities considered financial instruments, such as accrued investment income
and cash, are generally of a short-term nature. Their carrying values are
assumed to approximate fair value.

FINANCIAL ASSETS
The carrying value and fair value of financial assets at December 31, are as
follows:

<TABLE>
<CAPTION>
                                                        1999                             1998
                                                       -----                             -----
                                            CARRYING           FAIR            CARRYING          FAIR
                                              VALUE            VALUE             VALUE           VALUE
                                           -------------   -------------    -------------    ------------
<S>                                        <C>             <C>              <C>              <C>
Fixed income securities                    $   92,937       $   92,937         $ 94,313       $ 94,313
Short-term investments                         53,063           53,063            4,663          4,663
Separate Accounts                           1,541,756        1,541,756          993,622        993,622
</TABLE>

Fair values for fixed income securities are based on quoted market prices where
available. Non-quoted securities are valued based on discounted cash flows using
current interest rates for similar securities. Short-term investments are highly
liquid investments with maturities of less than one year whose carrying value
are deemed to approximate fair value. Separate Accounts assets are carried in
the statements of financial position at fair value based on quoted market
prices.

FINANCIAL LIABILITIES
The carrying value and fair value of financial liabilities at December 31, are
as follows:

<TABLE>
<CAPTION>

                                                        1999                             1998
                                                       -----                             -----
                                            CARRYING           FAIR            CARRYING          FAIR
                                              VALUE            VALUE             VALUE           VALUE
                                           -------------   -------------    -------------    ------------
<S>                                        <C>             <C>              <C>              <C>
Contractholder funds on
     investment contracts                   $  4,156,964   $   3,924,117     $  3,130,228     $ 2,967,101
Separate Accounts                              1,541,756       1,541,756          993,622         993,622
</TABLE>

The fair value of contractholder funds on investment contracts is based on the
terms of the underlying contracts. Reserves on investment contracts with no
stated maturities (single premium and flexible premium deferred annuities) are
valued at the account balance less surrender charges. The fair value of
immediate annuities and annuities without life contingencies with fixed terms is
estimated using discounted cash flow calculations based on interest rates
currently offered for contracts with similar terms and durations. Separate
Accounts liabilities are carried at the fair value of the underlying assets.

                                       13
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)


6. RESERVE FOR LIFE-CONTINGENT CONTRACT BENEFITS AND CONTRACTHOLDER FUNDS

At December 31, 1999 the reserve for life-contingent contract benefits consisted
of reserves for immediate annuities. The assumptions for mortality generally
utilized in calculating immediate annuity reserves is the 1983 group annuity
mortality table. Interest rate assumptions for immediate annuities vary from
3.5% to 7.2%. Other estimation methods used for immediate annuities include the
present value of contractually fixed benefits.

     At December 31, contractholder funds consists of the following:

<TABLE>
<CAPTION>

                                                 1999               1998
                                             -----------       -----------
   <S>                                       <C>               <C>
   Interest-sensitive life                   $     9,503       $     3,335
   Fixed annuities:
        Immediate annuities                       17,856            12,643
        Deferred annuities                     4,116,006         3,097,300
                                              -----------       -----------
        Total contractholder funds           $ 4,143,365       $ 3,113,278
                                              ===========       ===========
</TABLE>

Contractholder funds are equal to deposits received, net of commissions, and
interest credited to the benefit of the contractholder less withdrawals,
mortality charges and administrative expenses. Interest rates credited range
from 4.0% to 7.2% for interest-sensitive life contracts; 3.5% to 7.2% for
immediate annuities and 4.3% to 6.7% for deferred annuities. Withdrawal and
surrender charge protection includes: i) for interest-sensitive life, either a
percentage of account balance or dollar amount grading off generally over 20
years; and, ii) for deferred annuities not subject to a market value adjustment,
either a declining or a level percentage charge generally over nine years or
less. Approximately 1% of deferred annuities are subject to a market value
adjustment.

7. CORPORATION RESTRUCTURING

On November 10, 1999 the Corporation announced a series of strategic initiatives
to aggressively expand its selling and service capabilities. The Corporation
also announced that it is implementing a program to reduce expenses by
approximately $600 million. The reduction will result in the elimination of
approximately 4,000 current non-agent positions, across all employment grades
and categories by the end of 2000, or approximately 10% of the Corporation's
non-agent work force. The impact of the reduction in employee positions is not
expected to materially impact the results of operations of the Company.

These cost reductions are part of a larger initiative to redeploy the cost
savings to finance new initiatives including investments in direct access and
internet channels for new sales and service capabilities, new competitive
pricing and underwriting techniques, new agent and claim technology and enhanced
marketing and advertising. As a result of the cost reduction program, the
Corporation recorded restructuring and related charges of $81 million pretax
during the fourth quarter of 1999. The Corporation anticipates that additional
pretax restructuring related charges of approximately $100 million will be
expensed as incurred throughout 2000. The

                                       14
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)


Company's allocable share of these expenses were immaterial in 1999 and are
expected to be immaterial in 2000.


8. INCOME TAXES

For 1996, the Company filed a separate federal income tax return. Beginning in
1997, the Company joined the Corporation and its other eligible domestic
subsidiaries (the "Allstate Group") in the filing of a consolidated federal
income tax return and is party to a federal income tax allocation agreement (the
"Allstate Tax Sharing Agreement"). Under the Allstate Tax Sharing Agreement, the
Company pays to or receives from the Corporation the amount, if any, by which
the Allstate Group's federal income tax liability is affected by virtue of
inclusion of the Company in the consolidated federal income tax return.
Effectively, this results in the Company's annual income tax provision being
computed, with adjustments, as if the Company filed a separate return.

Prior to June 30, 1995, the Corporation was a subsidiary of Sears Roebuck & Co.
("Sears") and was, with its eligible domestic subsidiaries, included in the
Sears consolidated federal income tax return and federal income tax allocation
agreement. Effective June 30, 1995, the Corporation and Sears entered into a new
tax sharing agreement, which governs their respective rights and obligations
with respect to federal income taxes for all periods during which the
Corporation was a subsidiary of Sears, including the treatment of audits of tax
returns for such periods.

The Internal Revenue Service ("IRS") has completed its review of the Allstate
Group's federal income tax returns through the 1993 tax year. Any adjustment
that may result from IRS examinations of tax returns are not expected to have a
material impact on the financial position, liquidity or results of operations of
the Company.

The components of the deferred income tax assets and liabilities at December 31,
are as follows:

<TABLE>
<CAPTION>

                                                                 1999      1998
                                                                ------    -------
<S>                                                             <C>       <C>
DEFERRED ASSETS
Unrealized net capital losses                                   $ 433     $     -
                                                                -----     -------
   Total deferred assets                                          433           -

DEFERRED LIABILITIES
Difference in tax bases of investments                           (140)        (84)
Unrealized net capital gains                                     --        (2,415)
                                                                -----     -------
   Total deferred liabilities                                    (140)     (2,499)
                                                                -----     -------
   Net deferred asset (liability)                               $ 293     $(2,499)
                                                                =====     =======
</TABLE>

Although realization is not assured, management believes it is more likely than
not that the deferred tax asset will be realized based on the assumptions that
certain levels of income will be achieved.

                                       15
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)

The components of income tax expense for the year ended December 31, are as
follows:

<TABLE>
<CAPTION>

                                                        1999      1998      1997
                                                      -------   -------   -------
<S>                                                   <C>       <C>       <C>
Current                                               $2,326    $2,164    $3,037
Deferred                                                  56        18        41
                                                      ------    ------    ------
   Total income tax expense                           $2,382    $2,182    $3,078
                                                      ======    ======    ======
</TABLE>

The Company paid income taxes of $2,148, $592 and $2,839 in 1999, 1998 and 1997,
respectively.

A reconciliation of the statutory federal income tax rate to the effective
income tax rate on income from operations for the year ended December 31, is as
follows:

<TABLE>
<CAPTION>

                                                       1999      1998      1997
                                                      -------   -------   -------
<S>                                                   <C>       <C>       <C>
Statutory federal income tax rate                       35.0%     35.0%     35.0%
Other                                                    (.4)      -          .1
                                                      ------    ------    ------
Effective income tax rate                               34.6%     35.0%     35.1%
                                                      ======    ======    ======
</TABLE>

9. STATUTORY FINANCIAL INFORMATION

The Company's statutory capital and surplus was $141,362 and $84,865 at December
31, 1999 and 1998, respectively. The Company's statutory net income was $4,179,
$4,698 and $3,636 for the years ended December 31, 1999, 1998 and 1997,
respectively.

PERMITTED STATUTORY ACCOUNTING PRACTICES
The Company prepares its statutory financial statements in accordance with
accounting practices prescribed or permitted by the Arizona Department of
Insurance. Prescribed statutory accounting practices include a variety of
publications of the National Association of Insurance Commissioners ("NAIC"), as
well as state laws, regulations and general administrative rules. Permitted
statutory accounting practices encompass all accounting practices not so
prescribed. The Company does not follow any permitted statutory accounting
practices that have a significant impact on statutory surplus or statutory net
income.

The NAIC's codification initiative has produced a comprehensive guide of
statutory accounting principles, which the Company will implement in January
2001. The Company's state of domicile, Arizona, has passed legislation revising
various statutory accounting requirements to conform to codification. These
requirements are not expected to have a material impact on the statutory surplus
of the Company.

DIVIDENDS
The ability of the Company to pay dividends is dependent on business conditions,
income, cash requirements of the Company and other relevant factors. The payment
of shareholder dividends by the Company without the prior approval of the state
insurance regulator is limited to formula amounts based on net income and
capital and surplus, determined in accordance with statutory accounting
practices, as well as the timing and amount of dividends paid in the preceding
twelve

                                       16
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)



months. The maximum amount of dividends that the Company can distribute during
2000 without prior approval of the Arizona Department of Insurance is $4,179.

RISK-BASED CAPITAL
The NAIC has a standard for assessing the solvency of insurance companies, which
is referred to as risk-based capital ("RBC"). The requirement consists of a
formula for determining each insurer's RBC and a model law specifying regulatory
actions if an insurer's RBC falls below specified levels. The RBC formula for
life insurance companies establishes capital requirements relating to insurance,
business, asset and interest rate risks. At December, 31 1999, RBC for the
Company was significantly above levels that would require regulatory action.


10. OTHER COMPREHENSIVE INCOME

The components of other comprehensive income on a pretax and after-tax basis for
the year ended December 31, are as follows:

<TABLE>
<CAPTION>

                                            1999                            1998                          1997
                               ------------------------------  -------------------------------  ---------------------------
                                                     After-                          After-                         After-
                                Pretax      Tax       Tax       Pretax      Tax        Tax       Pretax     Tax      Tax
                               ---------  --------  -------     --------    -------  --------  --------  --------  -------
UNREALIZED CAPITAL GAINS
 AND LOSSES:
- -------------------------------
<S>                            <C>        <C>       <C>         <C>         <C>      <C>       <C>       <C>       <C>
Unrealized holding (losses)
   gains arising during
   the period                   $(7,822)  $ 2,739   $(5,083)     $2,019     $ (707)  $ 1,312   $ 4,034   $(1,412)  $ 2,622
Less:  reclassification
   adjustments                      312      (109)      203          (5)         2        (3)    3,453    (1,209)    2,244
                               --------   -------   -------     -------     ------   -------   --------  -------   -------
Unrealized net capital
   (losses) gains                (8,134)    2,848    (5,286)      2,024       (709)    1,315       581      (203)      378
                               --------   -------   -------     -------     ------   -------   --------  -------   -------
Other comprehensive
   (loss) income                $(8,134)  $ 2,848   $(5,286)     $2,024     $ (709)  $ 1,315   $   581   $  (203)  $   378
                                =======   =======   =======     =======     ======   =======     =====   =======   =======
</TABLE>

11. COMMITMENTS AND CONTINGENT LIABILITIES

REGULATION AND LEGAL PROCEEDINGS
The Company's business is subject to the effects of a changing social, economic
and regulatory environment. Public and regulatory initiatives have varied and
have included employee benefit regulations, removal of barriers preventing banks
from engaging in the securities and insurance business, tax law changes
affecting the taxation of insurance companies, the tax treatment of insurance
products and its impact on the relative desirability of various personal
investment vehicles, and proposed legislation to prohibit the use of gender in
determining insurance rates and benefits. The ultimate changes and eventual
effects, if any, of these initiatives are uncertain.

From time to time the Company is involved in pending and threatened litigation
in the normal course of its business in which claims for monetary damages are
asserted. In the opinion of management, the ultimate liability, if any, arising
from such pending or threatened litigation is not expected to have a material
effect on the results of operations, liquidity or financial position of the
Company.

                                       17
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                               ($ IN THOUSANDS)


GUARANTY FUNDS
Under state insurance guaranty fund laws, insurers doing business in a state can
be assessed, up to prescribed limits, for certain obligations of insolvent
insurance companies to policyholders and claimants. The Company's expenses
related to these funds have been immaterial. These expenses are ceded to ALIC
under reinsurance agreements.

MARKETING AND COMPLIANCE ISSUES
Companies operating in the insurance and financial services markets have come
under the scrutiny of regulators with respect to market conduct and compliance
issues. Under certain circumstances, companies have been held responsible for
providing incomplete or misleading sales materials and for replacing existing
policies with policies that were less advantageous to the policyholder. The
Company monitors its sales materials and enforces compliance procedures to
mitigate any exposure to potential litigation. The Company is a member of the
Insurance Marketplace Standards Association, an organization which advocates
ethical market conduct.

                                       18
<PAGE>

                      GLENBROOK LIFE AND ANNUITY COMPANY
                           SCHEDULE IV--REINSURANCE
                               ($ IN THOUSANDS)

<TABLE>
<CAPTION>
                                                                 GROSS                      NET
YEAR ENDED DECEMBER 31, 1999                                     AMOUNT        CEDED      AMOUNT
- ----------------------------                                   ---------    ------------ ----------
<S>                                                            <C>          <C>          <C>
Life insurance in force                                        $   23,586   $   23,586   $     --
                                                               ==========   ==========   ==========

Premiums and contract charges:
         Life and annuities                                    $   27,175   $   27,175   $     --
                                                               ==========   ==========   ==========
</TABLE>

<TABLE>
<CAPTION>

                                                                 GROSS                      NET
YEAR ENDED DECEMBER 31, 1998                                      AMOUNT        CEDED      AMOUNT
- ----------------------------                                   ---------    ------------ ----------
<S>                                                            <C>          <C>          <C>
Life insurance in force                                        $   12,056   $   12,056   $     --
                                                               ==========   ==========   ==========

Premiums and contract charges:
         Life and annuities                                    $   19,009   $   19,009   $     --
                                                               ==========   ==========   ==========
</TABLE>

<TABLE>
<CAPTION>

                                                                 GROSS                      NET
YEAR ENDED DECEMBER 31, 1997                                     AMOUNT        CEDED      AMOUNT
- ----------------------------                                   ---------    ------------ ----------
<S>                                                            <C>          <C>          <C>
Life insurance in force                                        $    4,095   $    4,095   $     --
                                                               ==========   ==========   ==========

Premiums and contract charges:
         Life and annuities                                    $   11,641   $   11,641   $     --
                                                               ==========   ==========   ==========
</TABLE>

                                       19
<PAGE>

                    ------------------------------------------------
                    GLENBROOK LIFE AND
                    ANNUITY COMPANY
                    SEPARATE ACCOUNT A

                    FINANCIAL STATEMENTS AS OF DECEMBER 31, 1999
                    AND FOR THE PERIODS ENDED DECEMBER 31, 1999 AND
                    DECEMBER 31, 1998, AND INDEPENDENT AUDITORS'
                    REPORT
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholder of
 Glenbrook Life and Annuity Company:

We have audited the accompanying statement of net assets of Glenbrook Life and
Annuity Company Separate Account A as of December 31, 1999 (including the assets
of each of the individual sub-accounts which comprise the Account as disclosed
in Note 1), and the related statements of operations for the period then ended
and the statements of changes in net assets for each of the periods in the two
year period then ended for each of the individual sub-accounts which comprise
the Account. These financial statements are the responsibility of management.
Our responsibility is to express an opinion on these financial statements based
on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. Our procedures included
confirmation of securities owned at December 31, 1999 by correspondence with the
account custodians. An audit also includes assessing the accounting principles
used and significant estimates made by management, as well as evaluating the
overall financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, such financial statements present fairly, in all material
respects, the financial position of Glenbrook Life and Annuity Company Separate
Account A as of December 31, 1999 (including the assets of each of the
individual sub-accounts which comprise the Account), and the results of
operations for each of the individual sub-accounts for the period then ended and
the changes in their net assets for each of the periods in the two year period
then ended in conformity with generally accepted accounting principles.

/s/ Deloitte & Touche LLP

Chicago, Illinois
March 27, 2000
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENT OF NET ASSETS
DECEMBER 31, 1999
- --------------------------------------------------------------------------------------------------------------------------
   <S>                                                                                                    <C>
   ASSETS
   Allocation to Sub-Accounts investing in the AIM Variable Insurance Funds:
       Aggressive Growth, 1,202,499 shares (cost $12,591,700)                                              $    17,121,218
       Balanced, 2,820,677 shares (cost $32,175,093)                                                            36,781,630
       Capital Appreciation, 5,640,099 shares (cost $123,610,584)                                              200,674,710
       Capital Development, 544,154 shares (cost $4,891,395)                                                     6,469,997
       Diversified Income, 2,903,217 shares (cost $31,442,374)                                                  29,206,359
       Global Utilities, 754,339 shares (cost $12,000,534)                                                      17,198,920
       Government Securities, 1,716,068 shares (cost $18,690,716)                                               18,241,806
       Growth, 5,520,352 shares (cost $122,399,910)                                                            178,031,344
       Growth and Income, 7,311,916 shares (cost $147,725,871)                                                 230,983,436
       High Yield, 1,310,837 shares (cost $12,183,042)                                                          11,823,752
       International Equity, 3,078,238 shares (cost $55,027,071)                                                90,161,585
       Money Market, 26,646,729 shares (cost $26,646,729)                                                       26,646,729
       Value, 8,644,940 shares (cost $201,358,972)                                                             289,605,478
                                                                                                          -----------------

       Total Assets                                                                                          1,152,946,964

   LIABILITIES
   Payable to Glenbrook Life and Annuity Company:
       Accrued contract maintenance charges                                                                        261,880
                                                                                                          -----------------

       Net Assets                                                                                          $ 1,152,685,084
                                                                                                          =================
</TABLE>






See notes to financial statements.

                                       2
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>

STATEMENTS OF OPERATIONS
- ----------------------------------------------------------------------------------------------------------------------------------
                                                                    AIM Variable Insurance Funds Sub-Accounts
                                                       ---------------------------------------------------------------------------

                                                                          For the Year Ended December 31, 1999
                                                       ---------------------------------------------------------------------------

                                                         Aggressive                       Capital        Capital      Diversified
                                                           Growth       Balanced       Appreciation    Development       Income
                                                       -------------  --------------  --------------  -------------  -------------
  <S>                                                  <C>            <C>             <C>             <C>            <C>
  INVESTMENT INCOME
  Dividends                                             $         -    $    632,664    $  4,236,568    $         -    $ 1,832,183
  Charges from Glenbrook Life and Annuity Company:
      Mortality and expense risk                            (98,256)       (255,170)     (1,960,006)       (45,942)      (380,130)
      Administrative expense                                 (7,992)        (20,601)       (147,276)        (3,688)       (28,594)
                                                       ------------   -------------   -------------   ------------   ------------
           Net investment income (loss)                    (106,248)        356,893       2,129,286        (49,630)     1,423,459
                                                       ------------   -------------   -------------   ------------   ------------

  REALIZED AND UNREALIZED GAINS
      (LOSSES) ON INVESTMENTS
  Realized gains (losses) from sales of investments:
      Proceeds from sales                                 3,247,524       1,924,385      24,806,931        872,588      6,926,838
      Cost of investments sold                            3,031,576       1,785,039      19,189,905        795,815      7,018,662
                                                       ------------   -------------   -------------   ------------   ------------

           Net realized gains (losses)                      215,948         139,346       5,617,026         76,773        (91,824)
                                                       ------------   -------------   -------------   ------------   ------------

  Change in unrealized gains (losses)                     4,209,609       4,020,500      51,595,684      1,390,044     (2,286,057)
                                                       ------------   -------------   -------------   ------------   ------------

           Net gains (losses) on investments              4,425,557       4,159,846      57,212,710      1,466,817     (2,377,881)
                                                       ------------   -------------   -------------   ------------   ------------


  CHANGE IN NET ASSETS
      RESULTING FROM OPERATIONS                         $ 4,319,309    $  4,516,739    $ 59,341,996    $ 1,417,187    $  (954,422)
                                                       ============   =============   =============   ============   ============
</TABLE>







See notes to financial statements.

                                        3
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENTS OF OPERATIONS
- ---------------------------------------------------------------------------------------------------------------------------------
                                                                       AIM Variable Insurance Funds Sub-Accounts
                                                       ---------------------------------------------------------------------------

                                                                            For the Year Ended December 31, 1999
                                                       ---------------------------------------------------------------------------

                                                         Global         Government                       Growth          High
                                                         Utilities      Securities        Growth       and Income        Yield
                                                       -------------   ------------   -------------   -------------   ------------
  <S>                                                  <C>             <C>            <C>             <C>             <C>
  INVESTMENT INCOME
  Dividends                                             $   267,439     $  626,354     $ 6,269,902     $ 1,929,971     $  887,090
  Charges from Glenbrook Life and Annuity Company:
      Mortality and expense risk                           (165,214)      (182,421)     (1,697,514)     (2,246,247)       (89,265)
      Administrative expense                                (12,519)       (14,096)       (128,606)       (170,120)        (7,253)
                                                       -------------   ------------   -------------   -------------   ------------

          Net investment income (loss)                       89,706        429,837       4,443,782        (486,396)       790,572
                                                       -------------   ------------   -------------   -------------   ------------

  REALIZED AND UNREALIZED GAINS
      (LOSSES) ON INVESTMENTS
  Realized gains (losses) from sales of investments:
      Proceeds from sales                                 1,744,420      5,346,438      17,350,511      17,480,900      3,537,974
      Cost of investments sold                            1,411,118      5,557,193      12,650,325      11,753,105      3,542,944
                                                       -------------   ------------   -------------   -------------   ------------

          Net realized gains (losses)                       333,302       (210,755)      4,700,186       5,727,795         (4,970)
                                                       -------------   ------------   -------------   -------------   ------------

  Change in unrealized gains (losses)                     3,515,858       (528,814)     32,217,069      47,095,503       (114,157)
                                                       -------------   ------------   -------------   -------------   ------------

          Net gains (losses) on investments               3,849,160       (739,569)     36,917,255      52,823,298       (119,127)
                                                       -------------   ------------   -------------   -------------   ------------

  CHANGE IN NET ASSETS
      RESULTING FROM OPERATIONS                         $ 3,938,866     $ (309,732)    $41,361,037     $52,336,902     $  671,445
                                                       =============   ============   =============   =============   ============
</TABLE>

See notes to financial statements.

                                        4
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENTS OF OPERATIONS
- ------------------------------------------------------------------------------------------------------------------------

                                                                      AIM Variable Insurance Funds Sub-Accounts
                                                                --------------------------------------------------------


                                                                        For the Year Ended December 31, 1999
                                                                ---------------------------------------------------------

                                                                International             Money
                                                                   Equity                 Market                Value
                                                                -------------          ------------         -------------
  <S>                                                           <C>                    <C>                  <C>
  INVESTMENT INCOME
  Dividends                                                     $  2,936,034           $  1,096,347         $  4,751,047
  Charges from Glenbrook Life and Annuity Company:
      Mortality and expense risk                                    (817,478)              (315,536)          (2,879,219)
      Administrative expense                                         (61,096)               (23,884)            (217,899)
                                                                -------------          -------------        -------------

           Net investment income (loss)                            2,057,460                756,927            1,653,929
                                                                -------------          -------------        -------------


  REALIZED AND UNREALIZED GAINS
      (LOSSES) ON INVESTMENTS
  Realized gains (losses) from sales of investments:
      Proceeds from sales                                          8,943,538             41,107,872           24,736,258
      Cost of investments sold                                     7,211,309             41,107,872           17,493,708
                                                                -------------          -------------        -------------

           Net realized gains (losses)                             1,732,229                      -            7,242,550
                                                                -------------          -------------        -------------

  Change in unrealized gains (losses)                             26,684,961                      -           48,321,129
                                                                -------------          -------------        -------------

           Net gains (losses) on investments                      28,417,190                      -           55,563,679
                                                                -------------          -------------        -------------


  CHANGE IN NET ASSETS
      RESULTING FROM OPERATIONS                                  $30,474,650           $    756,927          $57,217,608
                                                                =============          =============         =============
</TABLE>


See notes to financial statements.

                                        5
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE YEAR ENDED DECEMBER 31,
- ------------------------------------------------------------------------------------------------------------------------------------
                                                              AIM Variable Insurance Funds Sub-Accounts
                                        --------------------------------------------------------------------------------------------

                                              Aggressive Growth                Balanced                   Capital Appreciation
                                        ----------------------------  ----------------------------  --------------------------------

                                             1999         1998 (a)        1999          1998 (a)         1999              1998
                                        -------------  -------------  -------------  -------------  ---------------  ---------------
  <S>                                   <C>            <C>            <C>            <C>            <C>              <C>
  FROM OPERATIONS
  Net investment income (loss)           $  (106,248)   $     2,547    $   356,893    $    75,806    $   2,129,286    $   1,967,873
  Net realized gains (losses)                215,948        (15,810)       139,346          5,357        5,617,026        1,110,690
  Change in unrealized gains (losses)      4,209,609        319,909      4,020,500        586,037       51,595,684       16,356,911
                                        -------------  -------------  -------------  -------------  ---------------  ---------------

  Change in net assets resulting from
    operations                             4,319,309        306,646      4,516,739        667,200       59,341,996       19,435,474
                                        -------------  -------------  -------------  -------------  ---------------  ---------------

  FROM CAPITAL TRANSACTIONS
  Deposits                                 8,035,288      2,135,109     15,618,535      6,083,120       21,442,704       27,826,970
  Benefit Payments                            (8,753)       (14,062)      (309,234)             -       (1,408,893)      (1,288,645)
  Payments on termination                   (317,202)       (25,499)      (989,411)       (25,240)     (11,709,901)      (5,665,316)
  Contract maintenance charges                (4,663)          (962)        (8,851)        (1,991)         (57,450)         (49,931)
  Transfers among the sub-accounts
      and with the Fixed Account - net     1,685,558      1,006,560     10,092,477      1,129,932       (4,128,252)      (3,082,106)
                                        -------------  -------------  -------------  -------------  ---------------  ---------------

  Change in net assets resulting
      from capital transactions            9,390,228      3,101,146     24,403,516      7,185,821        4,138,208       17,740,972
                                        -------------  -------------  -------------  -------------  ---------------  ---------------

  INCREASE (DECREASE) IN NET ASSETS       13,709,537      3,407,792     28,920,255      7,853,021       63,480,204       37,176,446

  NET ASSETS AT BEGINNING OF PERIOD        3,407,792              -      7,853,021              -      137,148,924       99,972,478
                                        -------------  -------------  -------------  -------------  ---------------  ---------------

  NET ASSETS AT END OF PERIOD            $17,117,329    $ 3,407,792    $36,773,276    $ 7,853,021    $ 200,629,128    $ 137,148,924
                                        =============  =============  =============  =============  ===============  ===============
</TABLE>


(a) For the Period Beginning May 1, 1998 and Ended December 31, 1998.


See notes to financial statements.

                                        6
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE YEAR ENDED DECEMBER 31,
- ------------------------------------------------------------------------------------------------------------------------------------

                                                              AIM Variable Insurance Funds Sub-Accounts
                                          ------------------------------------------------------------------------------------------

                                               Capital Development           Diversified Income             Global Utilities
                                          ----------------------------  -----------------------------  -----------------------------

                                               1999         1998 (a)        1999            1998           1999            1998
                                          -------------  -------------  -------------  --------------  -------------  --------------
  <S>                                     <C>            <C>            <C>            <C>             <C>            <C>
  FROM OPERATIONS
  Net investment income (loss)             $   (49,630)   $    (1,482)   $ 1,423,459    $  1,441,294    $    89,706    $   116,938
  Net realized gains (losses)                   76,773        (85,264)       (91,824)        332,248        333,302        154,412
  Change in unrealized gains (losses)        1,390,044        188,558     (2,286,057)     (1,400,824)     3,515,858        890,786
                                          -------------   ------------   ------------   -------------   ------------   -------------

  Change in net assets resulting from
    operations                               1,417,187        101,812       (954,422)        372,718      3,938,866      1,162,136
                                          -------------   ------------   ------------   -------------   ------------   -------------

  FROM CAPITAL TRANSACTIONS
  Deposits                                   1,757,832      1,246,579      3,792,814       9,846,369      2,236,252      4,015,495
  Benefit Payments                            (129,146)       (13,161)      (675,319)       (385,671)      (100,968)       (46,809)
  Payments on termination                     (145,588)       (12,524)    (2,196,034)     (2,695,450)      (625,850)      (406,509)
  Contract maintenance charges                  (1,505)          (647)        (6,368)         (5,120)       (12,516)        (2,884)
  Transfers among the sub-accounts
      and with the Fixed Account - net       1,322,815        924,873        584,051      (1,467,235)     1,244,957         19,697
                                          -------------   ------------   ------------   -------------   ------------   -------------

  Change in net assets resulting
      from capital transactions              2,804,408      2,145,120      1,499,144       5,292,893      2,741,875      3,578,990
                                          -------------   ------------   ------------   -------------   ------------   -------------

  INCREASE (DECREASE) IN NET ASSETS          4,221,595      2,246,932        544,722       5,665,611      6,680,741      4,741,126

  NET ASSETS AT BEGINNING OF PERIOD          2,246,932              -     28,655,003      22,989,392     10,514,272      5,773,146
                                          -------------   ------------   ------------   -------------   ------------   -------------

  NET ASSETS AT END OF PERIOD              $ 6,468,527    $ 2,246,932    $29,199,725    $ 28,655,003    $17,195,013    $ 10,514,272
                                          =============   ============   ============   =============   ============   =============
</TABLE>

(a) For the Period Beginning May 1, 1998 and Ended December 31, 1998.


See notes to financial statements.

                                        7
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE YEAR ENDED DECEMBER 31,
- ------------------------------------------------------------------------------------------------------------------------------------

                                                             AIM Variable Insurance Funds Sub-Accounts
                                         -------------------------------------------------------------------------------------------

                                              Government Securities               Growth                 Growth and Income
                                         ----------------------------- ------------------------------ ------------------------------

                                               1999          1998           1999           1998            1999           1998
                                         -------------- -------------- -------------- --------------- -------------- ---------------
  <S>                                    <C>            <C>            <C>            <C>             <C>            <C>
  FROM OPERATIONS
  Net investment income (loss)            $    429,837   $    168,997   $  4,443,782   $   5,382,105   $   (486,396)  $     308,794
  Net realized gains (losses)                 (210,755)       153,359      4,700,186         987,982      5,727,795       1,053,908
  Change in unrealized gains (losses)         (528,814)       130,670     32,217,069      16,303,872     47,095,503      23,957,880
                                         --------------  -------------  -------------  --------------  -------------  --------------

  Change in net assets resulting from
    operations                                (309,732)       453,026     41,361,037      22,673,959     52,336,902      25,320,582
                                         --------------  -------------  -------------  --------------  -------------  --------------

  FROM CAPITAL TRANSACTIONS
  Deposits                                   4,797,984      4,568,260     32,904,800      23,869,470     41,198,795      36,230,581
  Benefit Payments                            (275,085)      (124,034)    (1,384,416)       (975,193)    (2,333,670)     (1,638,147)
  Payments on termination                     (882,622)    (1,262,189)    (9,060,632)     (3,190,196)    (9,522,305)     (5,238,011)
  Contract maintenance charges                  (3,191)        (2,326)       (33,261)        (34,053)       (66,649)        (40,480)
  Transfers among the sub-accounts
      and with the Fixed Account - net       3,392,041      1,923,252     10,386,196       3,705,981     13,778,324       3,017,320
                                         --------------  -------------  -------------  --------------  -------------  --------------

  Change in net assets resulting
      from capital transactions              7,029,127      5,102,963     32,812,687      23,376,009     43,054,495      32,331,263
                                         --------------  -------------  -------------  --------------  -------------  --------------

  INCREASE (DECREASE) IN NET ASSETS          6,719,395      5,555,989     74,173,724      46,049,968     95,391,397      57,651,845

  NET ASSETS AT BEGINNING OF PERIOD         11,518,268      5,962,279    103,817,182      57,767,214    135,539,573      77,887,728
                                         --------------  -------------  -------------  --------------  -------------  --------------

  NET ASSETS AT END OF PERIOD             $ 18,237,663   $ 11,518,268   $177,990,906   $ 103,817,182   $230,930,970   $ 135,539,573
                                         ==============  =============  =============  ==============  =============  ==============
</TABLE>

See notes to financial statements.

                                        8
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE YEAR ENDED DECEMBER 31,
- ------------------------------------------------------------------------------------------------------------------------------------

                                                              AIM Variable Insurance Funds Sub-Accounts
                                        --------------------------------------------------------------------------------------------

                                                   High Yield             International Equity              Money Market
                                        -----------------------------  ------------------------------  -----------------------------

                                             1999          1998 (a)         1999            1998           1999            1998
                                        --------------  -------------  --------------  --------------  -------------  --------------
  <S>                                   <C>             <C>            <C>             <C>             <C>            <C>
  FROM OPERATIONS
  Net investment income (loss)           $    790,572    $   133,544    $  2,057,460    $   (327,045)   $   756,927    $    486,612
  Net realized gains (losses)                  (4,970)       (44,695)      1,732,229         509,511              -           2,406
  Change in unrealized gains (losses)        (114,157)      (245,133)     26,684,961       6,041,195              -               -
                                        --------------  -------------  --------------  --------------  -------------  --------------

  Change in net assets resulting from
    operations                                671,445       (156,284)     30,474,650       6,223,661        756,927         489,018
                                        --------------  -------------  --------------  --------------  -------------  --------------

  FROM CAPITAL TRANSACTIONS
  Deposits                                  4,635,730      3,163,932       6,382,730       8,980,894      6,179,730      11,012,762
  Benefit Payments                            (69,216)       (27,383)       (568,866)       (545,615)    (1,376,343)       (581,205)
  Payments on termination                    (518,964)       (26,647)     (4,009,274)     (2,469,363)   (27,460,642)     (4,230,248)
  Contract maintenance charges                 (2,856)          (891)        (24,027)        (19,466)        (7,523)         (2,945)
  Transfers among the sub-accounts
      and with the Fixed Account - net      3,544,455        607,744       1,139,993      (1,619,523)    30,250,774      (2,261,847)
                                        --------------  -------------  --------------  --------------  -------------  --------------

  Change in net assets resulting
      from capital transactions             7,589,149      3,716,755       2,920,556       4,326,927      7,585,996       3,936,517
                                        --------------  -------------  --------------  --------------  -------------  --------------

  INCREASE (DECREASE) IN NET ASSETS         8,260,594      3,560,471      33,395,206      10,550,588      8,342,923       4,425,535

  NET ASSETS AT BEGINNING OF PERIOD         3,560,471              -      56,745,899      46,195,311     18,297,753      13,872,218
                                        --------------  -------------  --------------  --------------  -------------  --------------

  NET ASSETS AT END OF PERIOD            $ 11,821,065    $ 3,560,471    $ 90,141,105    $ 56,745,899    $26,640,676    $ 18,297,753
                                        ==============  =============  ==============  ==============  =============  ==============
</TABLE>


(a) For the Period Beginning May 1, 1998 and Ended December 31, 1998.


See notes to financial statements.

                                        9
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

<TABLE>
<CAPTION>
STATEMENTS OF CHANGES IN NET ASSETS
FOR THE YEAR ENDED DECEMBER 31,
- ----------------------------------------------------------------------------------



                                                       AIM Variable Insurance
                                                         Funds Sub-Accounts
                                                   -------------------------------

                                                               Value
                                                   -------------------------------

                                                        1999             1998
                                                   -------------   ---------------
  <S>                                               <C>              <C>
  FROM OPERATIONS
  Net investment income (loss)                      $  1,653,929     $   5,973,408
  Net realized gains (losses)                          7,242,550         1,063,109
  Change in unrealized gains (losses)                 48,321,129        29,565,438
                                                    ------------     -------------


  Change in net assets resulting from operations      57,217,608        36,601,955
                                                    ------------     -------------

  FROM CAPITAL TRANSACTIONS
  Deposits                                            57,580,730        42,925,682
  Benefit Payments                                    (2,736,914)       (1,481,255)
  Payments on termination                            (15,807,346)       (6,178,474)
  Contract maintenance charges                           (84,128)          (56,393)
  Transfers among the sub-accounts
      and with the Fixed Account - net                20,233,291         2,724,682
                                                    ------------     -------------

  Change in net assets resulting
      from capital transactions                       59,185,633        37,934,242
                                                    ------------     -------------

  INCREASE (DECREASE) IN NET ASSETS                  116,403,241        74,536,197

  NET ASSETS AT BEGINNING OF PERIOD                  173,136,456        98,600,259
                                                    ------------     -------------

  NET ASSETS AT END OF PERIOD                       $289,539,697     $ 173,136,456
                                                    ============     =============
</TABLE>




See notes to financial statements.

                                      10
<PAGE>

GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A

NOTES TO FINANCIAL STATEMENTS

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


1.    ORGANIZATION

      Glenbrook Life and Annuity Company Separate Account A (the "Account"), a
      unit investment trust registered with the Securities and Exchange
      Commission under the Investment Company Act of 1940, is a Separate Account
      of Glenbrook Life and Annuity Company ("Glenbrook Life"). The assets of
      the Account are legally segregated from those of Glenbrook Life. Glenbrook
      Life is wholly owned by Allstate Life Insurance Company, a wholly owned
      subsidiary of Allstate Insurance Company, which is wholly owned by The
      Allstate Corporation.

      Glenbrook Life issues the AIM Lifetime-Plus(sm)and AIM Lifetime-Plus(sm)II
      variable annuity contracts, the deposits of which are invested at the
      direction of the contractholders in the sub-accounts that comprise the
      Account. Absent any contract provisions wherein Glenbrook Life
      contractually guarantees either a minimum return or account value to the
      beneficiaries of the contractholders in the form of a death benefit, the
      contractholders bear the investment risk that the sub-accounts may not
      meet their stated objectives. The sub-accounts invest in the following
      underlying mutual fund portfolios of the AIM Variable Insurance Funds
      (the"Funds").

          Aggressive Growth               Growth
          Balanced                        Growth and Income
          Capital Appreciation            High Yield
          Capital Development             International Equity
          Diversified Income              Money Market
          Global Utilities                Value
          Government Securities

      Glenbrook Life provides insurance and administrative services to the
      contractholders for a fee. Glenbrook Life also maintains a fixed account
      ("Fixed Account"), to which contractholders may direct their deposits and
      receive a fixed rate of return. Glenbrook Life has sole discretion to
      invest the assets of the Fixed Account, subject to applicable law.



2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

      VALUATION OF INVESTMENTS - Investments consist of shares of the Funds and
      are stated at fair value based on quoted market prices at December 31,
      1999.

      INVESTMENT INCOME - Investment income consists of dividends declared by
      the Funds and is recognized on the ex-dividend date.

      REALIZED GAINS AND LOSSES - Realized gains and losses represent the
      difference between the proceeds from sales of portfolio shares by the
      Account and the cost of such shares, which is determined on a weighted
      average basis.

      FEDERAL INCOME TAXES - The Account intends to qualify as a segregated
      asset account as defined in the Internal Revenue Code ("Code"). As such,
      the operations of the Account are included in the tax return of Glenbrook
      Life. Glenbrook Life is taxed as a life insurance company under the Code.
      No federal income taxes are allocable to the Account as the Account did
      not generate taxable income.

                                      11
<PAGE>

2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

      USE OF ESTIMATES - The preparation of financial statements in conformity
      with generally accepted accounting principles requires management to make
      estimates and assumptions that affect the amounts reported in the
      financial statements and accompanying notes. Actual results could differ
      from those estimates.



3.    EXPENSES

      ADMINISTRATIVE EXPENSE CHARGE - Glenbrook Life deducts administrative
      expense charges daily at a rate equal to .10% per annum of the average
      daily net assets of the Account. Glenbrook Life guarantees that the amount
      of this charge will not increase over the life of the contract.

      CONTRACT MAINTENANCE CHARGE - Glenbrook Life deducts an annual maintenance
      charge of $35 on each contract anniversary and guarantees that this charge
      will not increase over the life of the contract. This charge will be
      waived if certain conditions are met.

      MORTALITY AND EXPENSE RISK CHARGE - Glenbrook Life assumes mortality and
      expense risks related to the operations of the Account and deducts charges
      daily. The mortality and expense risk charge covers insurance benefits
      available with the contract and certain expenses of the contract. It also
      covers the risk that the current charges will not be sufficient in the
      future to cover the cost of administering the contract. Glenbrook Life
      guarantees that the amount of this charge will not increase over the life
      of the contract. At the contractholder's discretion, additional options,
      primarily death benefits, may be purchased for an additional charge.
      Glenbrook Life guarantees that the amount of this charge will not increase
      over the life of the contract.

                                      12
<PAGE>

4.    UNITS ISSUED AND REDEEMED

(Units in whole amounts)

<TABLE>
<CAPTION>
                                                                          AIM LIFETIME PLUS CONTRACTS

                                                                           Unit activity during 1999:
                                                                  ---------------------------------------------
                                                                                                                   Accumulation
                                             Units Outstanding        Units         Units     Units Outstanding     Unit Value
                                             December 31, 1998       Issued       Redeemed    December 31, 1999   December 31, 1999
                                             -----------------    ---------       --------    -----------------   -----------------
<S>                                          <C>                  <C>          <C>            <C>                 <C>
Investments in the AIM Variable Insurance
Funds Sub-Accounts:

         Aggressive Growth                             163,537      184,361      (100,135)              247,763             $ 13.99
         Balanced                                      244,603      159,944      (106,859)              297,688               13.16
         Capital Appreciation                        8,770,421      307,397    (1,617,429)            7,460,389               21.35
         Capital Development                           126,384       26,585       (48,513)              104,456               11.66
         Diversified Income                          2,301,209      214,498      (565,733)            1,949,974               11.63
         Global Utilities                              630,811       62,993       (89,561)              604,243               20.43
         Government Securities                         912,586      238,814      (359,467)              791,933               11.19
         Growth                                      5,170,994      385,091      (891,193)            4,664,892               25.26
         Growth and Income                           6,935,245      519,163      (978,168)            6,476,240               24.14
         High Yield                                    170,679      271,185      (234,238)              207,626                9.96
         International Equity                        3,847,934      256,272      (621,547)            3,482,659               21.91
         Money Market                                1,389,344    3,699,838    (3,452,257)            1,636,925               11.48
         Value                                       9,222,186      692,912    (1,465,091)            8,450,007               22.59


Units relating to accrued contract maintenance charges are included in units redeemed.
</TABLE>

                                      13
<PAGE>

4.    UNITS ISSUED AND REDEEMED


(Units in whole amounts)

<TABLE>
<CAPTION>
                                                                          AIM LIFETIME PLUS II CONTRACTS

                                                                           Unit activity during 1999:
                                                                  ---------------------------------------------
                                                                                                                    Accumulation
                                              Units Outstanding       Units         Units     Units Outstanding       Unit Value
                                              December 31, 1998      Issued       Redeemed    December 31, 1999   December 31, 1999
                                              -----------------   ---------       --------    -----------------   -----------------
<S>                                           <C>                 <C>             <C>         <C>                 <C>
Investments in the AIM Variable Insurance
Funds Sub-Accounts:

              Aggressive Growth                          50,119     301,769        (16,964)             334,924             $ 15.11
              Balanced                                   67,315     607,933        (48,268)             626,980               13.33
              Capital Appreciation                       97,387     773,222        (40,902)             829,707               15.79
              Capital Development                        12,713     120,814         (7,555)             125,972               12.66
              Diversified Income                         31,735     229,422        (12,632)             248,525                9.58
              Global Utilities                           28,175      89,775         (5,466)             112,484               14.27
              Government Securities                      52,212     405,077        (54,789)             402,500               10.16
              Growth                                     77,514   1,170,719        (72,062)           1,176,171               15.82
              Growth and Income                         112,627   1,431,896        (71,562)           1,472,961               15.51
              High Yield                                 61,267     367,205        (53,638)             374,834                9.95
              International Equity                       34,979     272,471        (13,429)             294,021               14.84
              Money Market                              104,779     380,718       (201,276)             284,221               10.58
              Value                                     139,946   1,851,057        (89,163)           1,901,840               15.09


Units relating to accrued contract maintenance charges are included in units redeemed.
</TABLE>

                                      14
<PAGE>

4.    UNITS ISSUED AND REDEEMED


(Units in whole amounts)

<TABLE>
<CAPTION>
                                                       AIM LIFETIME PLUS II CONTRACTS WITH ENHANCED DEATH BENEFIT COMBINATION

                                                                           Unit activity during 1999:
                                                                  --------------------------------------------
                                                                                                                    Accumulation
                                              Units Outstanding      Units         Units     Units Outstanding       Unit Value
                                              December 31, 1998     Issued       Redeemed    December 31, 1999   December 31, 1999
                                              -----------------   --------       --------    -----------------   -----------------
<S>                                           <C>                  <C>           <C>         <C>                 <C>
Investments in the AIM Variable Insurance
Funds Sub-Accounts:

             Aggressive Growth                           57,688      441,244     (184,184)             314,748             $ 15.06
             Balanced                                   221,488      980,109      (52,252)           1,149,345               13.29
             Capital Appreciation                       223,554      939,687      (58,091)           1,105,150               15.74
             Capital Development                         55,046      165,029      (24,952)             195,123               12.62
             Diversified Income                          40,007      293,800      (56,771)             277,036                9.55
             Global Utilities                            21,377      133,089       (7,935)             146,531               14.23
             Government Securities                       15,866      410,394      (95,946)             330,314               10.13
             Growth                                     182,188    1,469,272      (60,766)           1,590,694               15.77
             Growth and Income                          276,962    1,900,703      (90,586)           2,087,079               15.47
             High Yield                                 103,485      315,867      (57,447)             361,905                9.91
             International Equity                        63,514      351,411      (40,551)             374,374               14.79
             Money Market                               111,395      420,695     (281,583)             250,507               10.55
             Value                                      350,953    2,714,994     (153,067)           2,912,880               15.04


Units relating to accrued contract maintenance charges are included in units redeemed.
</TABLE>

                                      15
<PAGE>

4.    UNITS ISSUED AND REDEEMED


(Units in whole amounts)

<TABLE>
<CAPTION>
                                                  AIM LIFETIME PLUS II CONTRACTS WITH ENHANCED DEATH AND INCOME BENEFIT COMBINATION

                                                                           Unit activity during 1999:
                                                                  ---------------------------------------------
                                                                                                                    Accumulation
                                              Units Outstanding        Units        Units     Units Outstanding       Unit Value
                                              December 31, 1998       Issued      Redeemed    December 31, 1999   December 31, 1999
                                              -----------------   ----------      --------    -----------------   -----------------
<S>                                           <C>                  <C>            <C>         <C>                 <C>
Investments in the AIM Variable Insurance Funds Sub-Accounts:

             Aggressive Growth                           63,177      205,731       (12,580)             256,328             $ 15.02
             Balanced                                   164,576      557,405       (25,887)             696,094               13.25
             Capital Appreciation                       203,098      526,960       (38,311)             691,747               15.69
             Capital Development                         42,275       55,546        (2,892)              94,929               12.58
             Diversified Income                          25,503      138,673        (7,740)             156,436                9.52
             Global Utilities                            16,742       66,280        (1,277)              81,745               14.18
             Government Securities                       28,964      180,838       (17,699)             192,103               10.10
             Growth                                     233,659      850,660       (36,958)           1,047,361               15.72
             Growth and Income                          384,306      939,145       (60,327)           1,263,124               15.42
             High Yield                                  55,345      215,963       (24,714)             246,594                9.88
             International Equity                        63,643      210,267        (7,798)             266,112               14.74
             Money Market                                61,481      403,123      (255,504)             209,100               10.52
             Value                                      397,504    1,397,006       (51,623)           1,742,887               15.00


Units relating to accrued contract maintenance charges are included in units redeemed.
</TABLE>

                                      16


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