AMERICAN CENTURY MUTUAL FUNDS INC
497K3B, 1998-10-15
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                                  FUND PROFILE

                                      Ultra

                                 INVESTOR CLASS

                               September 30, 1998

                        [american century logo(reg.sm)]
                                    American
                                    Century

     This profile summarizes key information about the fund that is included
         in the fund's Prospectus. The fund's Prospectus has additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
         accessing our Web site or visiting one of our Investor Centers.
      See the back cover for additional telephone numbers and our address.

                             TWENTIETH CENTURY GROUP


                          AMERICAN CENTURY INVESTMENTS

                                      ULTRA

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Ultra seeks  long-term  capital growth by investing  primarily in common
     stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund advisor looks for stocks of medium to large  companies  that it
     believes will  increase in value over time.  The fund advisor uses a growth
     investment  strategy developed by American Century that looks for companies
     whose  earnings  and  revenues  are not  only  growing,  but  growing  at a
     successively faster, or accelerating,  pace.  Accelerating growth is shown,
     for  example,  by growth that is faster this  quarter  than last and faster
     this year than the year before.

        Using American Century's  extensive computer database,  the fund advisor
     tracks  financial  information  for  thousands of companies to research and
     select the stocks it believes will be able to sustain  accelerating growth.
     This strategy is based on the premise that,  over the long term, the stocks
     of   companies   with   accelerating   earnings   and   revenues   have   a
     greater-than-average   chance  to  increase  in  value.   This   aggressive
     investment  strategy,  which pursues  superior  long-term  returns for fund
     shareholders, also results in the risks described in the next section.

        The fund  advisor  does not  attempt  to time the  market.  Instead,  it
     intends to keep Ultra  essentially  fully invested in stocks  regardless of
     the movement of stock prices generally. When the fund advisor believes that
     it is  prudent,  it also may invest  assets in  non-leveraged  futures  and
     options. "Non- leveraged" means that the fund may not invest in futures and
     options  where it would be  possible  to lose more than the fund  invested.
     Futures and options can help the fund's  cash assets  remain  liquid  while
     performing more like stocks.

        Additional  information  about Ultra's  investments  is available in its
     annual and semiannual  reports. In these reports you will find a discussion
     of the market  conditions  and  investment  strategies  that  significantly
     affected the fund's  performance  during the most recent six-month  period.
     You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of  Ultra's  shares  depends on the value of the stocks and other
     securities it owns. The value of the individual  securities Ultra owns will
     go up and down  depending on the  performance  of the companies that issued
     them, general market and economic conditions, and investor confidence.

    *The fund advisor will buy a large amount of a company's stock quickly,  and
     often will  dispose of it quickly if the  company's  earnings  or  revenues
     decline. While the fund advisor believes this strategy provides substantial
     appreciation  potential over the long term, in the short term it can create
     a significant  amount of share price  volatility.  This  volatility  can be
     greater than that of the average stock fund.

    *As with all funds,  at any given  time,  the value of your  shares of Ultra
     may be worth more or less than the price you paid.  If you sell your shares
     when the value is less than the price you paid, you will lose money.

    *An  investment  in the fund is not a bank  deposit,  nor is it  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government agency.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

    *Although  the fund  advisor  invests the fund's  assets  primarily  in U.S.
     stocks,  Ultra can  invest in  securities  of  foreign  companies.  Foreign
     securities  can  have  certain  unique  risks,  including  fluctuations  in
     currency  exchange  rates,  unstable  political  and  economic  structures,
     reduced  availability of public  information and lack of uniform  financial
     reporting  and  regulatory  practices  similar  to those that apply to U.S.
     issuers.

        In summary,  Ultra is intended for investors who seek long-term  capital
     growth through an aggressive  equity fund and who are willing to accept the
     risks associated with the fund's investment strategy.


ULTRA                                               AMERICAN CENTURY INVESTMENTS


FUND PERFORMANCE

        The following bar chart shows the actual performance of Ultra's Investor
     Class  shares  for  each  of the  last 10  calendar  years.  The bar  chart
     indicates  the  volatility  of the fund's  historical  returns from year to
     year.  Neither the bar chart nor the  performance  information  below it is
     intended to indicate how the fund will perform in the future.


[bar chart]

CALENDAR YEAR-BY-YEAR RETURNS
             1988   1989   1990   1991   1992   1993   1994   1995   1996   1997
Ultra       13.32  36.94   9.36  86.45   1.27  21.81  -3.62  37.68  13.85  23.13

As of September 30, 1998, the end of the most recent calendar  quarter,  Ultra's
year-to-date return was 9.38%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar quarter since January 1, 1988, are provided in the following chart
     to  indicate  the fund's  historical  short-term  volatility.  Shareholders
     should be aware,  however,  that Ultra is  intended  for  investors  with a
     long-term investment horizon and is not managed for short-term results.


[bar chart]

     Highest and Lowest Quarterly Returns
          Quarter Ended 3/31/91     40.75%
          Quarter Ended 9/30/90    -16.16%

        The  following  table  shows the  average  annual  return of the  fund's
     Investor  Class  shares for the periods  indicated.  The S&P 500 Index,  an
     unmanaged  index  that  reflects  no  operating  costs,  is  included  as a
     benchmark for long-term  performance  comparisons because it is viewed as a
     proxy for the entire U.S. stock market.

                                             1 YEAR       5 YEARS       10 YEARS
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
            Ultra                             6.00%        14.57%        21.60%
            S&P 500 Index                     9.02%        19.87%        17.24%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American  Century funds
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
          Management Fee                                       1.00%
          Distribution and Service (12b-1) Fees                None
          Other Expenses(1)                                    0.00%
          Total Annual Fund Operating Expenses                 1.00%

       (1)Other  expenses,  which  include  the fees and  expenses of the fund's
       independent  directors,  their legal counsel,  interest and extraordinary
       expenses, were less than 0.005% for the most recent fiscal year.

          EXAMPLE OF HYPOTHETICAL FUND COSTS
              Assuming you . . .
              * invest $10,000 in the fund
              * redeem your shares at the end of the periods shown below 
              * earn a 5% return each year 
              * incur the same fund operating expenses shown above
                  . . . your cost of investing in the fund would be:

          1 year         3 years       5 years        10 years
          ----------------------------------------------------
          $102             $318          $551          $1,219

              Of course,  actual costs may be higher or lower.  Use this example
              to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage its mutual funds.  The  portfolio  managers on the Ultra
     team are:

        JAMES E. STOWERS III,  Chief  Executive  Officer and Portfolio  Manager,
     joined American Century as a portfolio  manager of Ultra and other American
     Century growth-oriented funds in 1981.


FUND PROFILE                                                               ULTRA


        JOHN R. SYKORA,  Portfolio  Manager,  has been a member of the team that
     manages Ultra since August 1997. He joined American  Century in May 1994 as
     an Investment  Analyst.  Before joining  American  Century,  he served as a
     Financial Analyst for Business Men's Assurance  Company of America,  Kansas
     City, Missouri from August 1993 to April 1994.

        BRUCE A. WIMBERLY, Portfolio Manager, has been a member of the team that
     manages Ultra since July 1996. He joined American Century in September 1994
     as an Investment  Analyst.  Before joining  American  Century,  he attended
     Kellogg Graduate School of Management,  Northwestern University from August
     1992 to August 1994, where he obtained his MBA.

6. HOW DO I BUY FUND SHARES?

     * Complete and return the enclosed application

     * Call us and exchange shares from another American Century fund

     * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts),  unless you establish an automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls   below  this   account   minimum,   your   shares  may  be  redeemed
     involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing  or  calling  us. You also may  exchange  your  shares in Ultra for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Ultra pays distributions of substantially all of its income and realized
     capital  gains  once a year,  usually  in  December.  Distributions  may be
     taxable as ordinary  income,  capital  gains or a  combination  of the two.
     Capital gains are taxed at different  rates depending on the length of time
     the fund held the securities that were sold.  Distributions  are reinvested
     automatically in additional shares unless you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

     * telephone transactions

     * wire and electronic funds transfers

     * 24-hour Automated Information Line transactions

     * 24-hour online Internet account access and transactions

        You will find more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds and  redeem  them  will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

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

[american century logo(reg.sm)]
            American
            Century


AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.

SH-BRO-13867   9810
<PAGE>
                                  FUND PROFILE

                                      Vista

                                 INVESTOR CLASS

                               September 30, 1998

                        [american century logo(reg.sm)]
                                    American
                                     Century

     This profile summarizes key information about the fund that is included
         in the fund's Prospectus. The fund's Prospectus has additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
         accessing our Web site or visiting one of our Investor Centers.
      See the back cover for additional telephone numbers and our address.

                             TWENTIETH CENTURY GROUP


                          AMERICAN CENTURY INVESTMENTS

                                      VISTA

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Vista seeks  long-term  capital growth by investing  primarily in common
     stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund  advisor  looks for stocks of companies  that it believes  will
     increase in value over time.  A majority of the stocks  selected are issued
     by medium- and smaller-sized companies,  although the fund may own stock of
     larger companies,  too. The fund advisor uses a growth investment  strategy
     developed by American  Century that looks for companies  whose earnings and
     revenues are not only growing,  but growing at a  successively  faster,  or
     accelerating,  pace.  Accelerating  growth is shown, for example, by growth
     that is faster  this  quarter  than last and faster this year than the year
     before.

        Using American Century's  extensive computer database,  the fund advisor
     tracks  financial  information  for  thousands of companies to research and
     select the stocks it believes will be able to sustain  accelerating growth.
     This strategy is based on the premise that,  over the long term, the stocks
     of   companies   with   accelerating   earnings   and   revenues   have   a
     greater-than-average   chance  to  increase  in  value.   This   aggressive
     investment  strategy,  which pursues  superior  long-term  returns for fund
     shareholders, also results in the risks described in the next section.

        The fund  advisor  does not  attempt  to time the  market.  Instead,  it
     intends to keep Vista  essentially  fully invested in stocks  regardless of
     the movement of stock prices generally. When the fund advisor believes that
     it is  prudent,  it also may invest  assets in  non-leveraged  futures  and
     options.  "Non-leveraged" means that the fund may not invest in futures and
     options  where it would be  possible  to lose more than the fund  invested.
     Futures and options can help the fund's  cash assets  remain  liquid  while
     performing more like stocks.

        Additional  information  about Vista's  investments  is available in its
     annual and semiannual  reports. In these reports you will find a discussion
     of the market  conditions  and  investment  strategies  that  significantly
     affected the fund's  performance  during the most recent six-month  period.
     You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of  Vista's  shares  depends on the value of the stocks and other
     securities it owns. The value of the individual  securities Vista owns will
     go up and down  depending on the  performance  of the companies that issued
     them, general market and economic conditions, and investor confidence.

    *The fund advisor will buy a large amount of a company's stock quickly,  and
     often will  dispose of it quickly if the  company's  earnings  or  revenues
     decline. While the fund advisor believes this strategy provides substantial
     appreciation  potential over the long term, in the short term it can create
     a significant  amount of share price  volatility.  This  volatility  can be
     greater than that of the average stock fund.

    *As with all funds,  at any given  time,  the value of your  shares of Vista
     may be worth more or less than the price you paid.  If you sell your shares
     when the value is less than the price you paid, you will lose money.

    *An  investment  in the fund is not a bank  deposit,  nor is it  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government agency.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

    *Because Vista  generally  invests in smaller  companies  than our similarly
     managed Ultra and Growth  funds,  it may be more  volatile,  and subject to
     greater short-term risk, than those funds.

    *Although  the fund  advisor  invests the fund's  assets  primarily  in U.S.
     stocks,  Vista can  invest in  securities  of  foreign  companies.  Foreign
     securities  can  have  certain  unique  risks,  including  fluctuations  in
     currency  exchange  rates,  unstable  political  and  economic  structures,
     reduced  availability of public  information and lack of uniform  financial
     reporting  and  regulatory  practices  similar  to those that apply to U.S.
     issuers.


VISTA                                              AMERICAN CENTURY INVESTMENTS


        In summary,  Vista is intended for investors who seek long-term  capital
     growth through an aggressive  equity fund and who are willing to accept the
     risks associated with the fund's investment strategy.

FUND PERFORMANCE

        The following bar chart shows the actual performance of Vista's Investor
     Class  shares  for  each  of the  last 10  calendar  years.  The bar  chart
     indicates  the  volatility  of the fund's  historical  returns from year to
     year.  Neither the bar chart nor the  performance  information  below it is
     intended to indicate how the fund will perform in the future.


[bar chart]

CALENDAR YEAR-BY-YEAR RETURNS
               1988   1989    1990   1991   1992  1993  1994   1995  1996   1997
Vista          2.44  52.20  -15.73  73.69  -2.13  5.45  4.68  46.13  7.56  -8.68

As of September 30, 1998, the end of the most recent calendar  quarter,  Vista's
year-to-date return was -24.07%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter  since  January 1, 1988,  are  pro-vided in the following
     chart to indicate the fund's historical short-term volatility. Shareholders
     should be aware,  however,  that Vista is  intended  for  investors  with a
     long-term investment horizon and is not managed for short-term results.


[bar chart]

     Highest and Lowest Quarterly Returns
          Quarter Ended 3/31/91      33.24%
          Quarter Ended 9/30/90     -29.82%

        The  following  table  shows the  average  annual  return of the  fund's
     Investor  Class  shares for the  periods  indicated.  Unlike an index fund,
     Vista makes no attempt to match the benchmark over short-term periods.  The
     Russell 2500 Growth  Index,  an unmanaged  index that reflects no operating
     costs, is included as a benchmark for long-term performance comparisons.

                                          1 YEAR        5 YEARS     10 YEARS
     AVERAGE ANNUAL TOTAL RETURNS  (PERIOD ENDED SEPTEMBER 30, 1998)
          Vista                            -37.28%      1.70%        9.71%
          Russell 2500 Growth Index        -24.34%      7.99%       11.13%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American  Century funds
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
          Management Fee                                    1.00%
          Distribution and Service (12b-1) Fees             None
          Other Expenses(1)                                 0.00%
          Total Annual Fund Operating Expenses              1.00%

       (1)Other  expenses,  which  include  the fees and  expenses of the fund's
       independent  directors,  their legal counsel,  interest and extraordinary
       expenses, were less than 0.005% for the most recent fiscal year.

     EXAMPLE OF HYPOTHETICAL FUND COSTS
         Assuming you . . .
         * invest $10,000 in the fund
         * redeem your shares at the end of the periods shown below 
         * earn a 5% return each year 
         * incur the same fund operating expenses shown above
             . . . your cost of investing in the fund would be:

     1 year       3 years        5 years       10 years
     ---------------------------------------------------
     $102         $318           $551          $1,219


               Of course,  actual costs may be higher or lower. Use this example
               to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage its mutual funds.  The  portfolio  managers on the Vista
     team are:


FUND PROFILE                                                              VISTA


        ARNOLD K.  DOUVILLE,  Vice President and Portfolio  Manager,  has been a
     member of the team that manages  Vista since  joining  American  Century in
     November  1997.  Before  joining  American  Century,  he  served  as Senior
     Portfolio  Manager for Munder  Capital  Management  from  September 1989 to
     October 1997.

        GLENN A. FOGLE, Vice President and Portfolio Manager,  has been a member
     of the team that manages Vista since March 1993. He joined American Century
     in September 1990 as an Investment Analyst.

6. HOW DO I BUY FUND SHARES?

     * Complete and return the enclosed application

     * Call us and exchange shares from another American Century fund

     * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts),  unless you establish an automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls   below  this   account   minimum,   your   shares  may  be  redeemed
     involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing  or  calling  us. You also may  exchange  your  shares in Vista for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Vista pays distributions of substantially all of its income and realized
     capital  gains  once a year,  usually  in  December.  Distributions  may be
     taxable as ordinary  income,  capital  gains or a  combination  of the two.
     Capital gains are taxed at different  rates depending on the length of time
     the fund held the securities that were sold.  Distributions  are reinvested
     automatically in additional shares unless you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

     * telephone transactions

     * wire and electronic funds transfers

     * 24-hour Automated Information Line transactions

     * 24-hour online Internet account access and transactions

        You will find more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds and  redeem  them  will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

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

[american century logo(reg.sm)]
            American           
            Century            

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                        Funds Distributor, Inc.

SH-BRO-13868   9810
<PAGE>
                                  FUND PROFILE

                                     Growth

                                 INVESTOR CLASS

                               September 30, 1998

                        [american century logo(reg.sm)]
                                    American
                                     Century

     This profile summarizes key information about the fund that is included
         in the fund's Prospectus. The fund's Prospectus has additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
         accessing our Web site or visiting one of our Investor Centers.
      See the back cover for additional telephone numbers and our address.

                             TWENTIETH CENTURY GROUP


                          AMERICAN CENTURY INVESTMENTS

                                     GROWTH

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Growth seeks long-term  capital growth by investing  primarily in common
     stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund advisor  looks for large  company  stocks that it believes will
     increase  in value over time.  The fund  advisor  uses a growth  investment
     strategy  developed  by American  Century  that looks for  companies  whose
     earnings and revenues are not only growing,  but growing at a  successively
     faster, or accelerating,  pace.  Accelerating growth is shown, for example,
     by growth that is faster this  quarter  than last and faster this year than
     the year before.

        Using American Century's  extensive computer database,  the fund advisor
     tracks  financial  information  for  thousands of companies to research and
     select the stocks it believes will be able to sustain  accelerating growth.
     This strategy is based on the premise that,  over the long term, the stocks
     of   companies   with   accelerating   earnings   and   revenues   have   a
     greater-than-average   chance  to  increase  in  value.   This   aggressive
     investment  strategy,  which pursues  superior  long-term  returns for fund
     shareholders, also results in the risks described in the next section.

        The fund  advisor  does not  attempt  to time the  market.  Instead,  it
     intends to keep Growth  essentially  fully invested in stocks regardless of
     the movement of stock prices generally. When the fund advisor believes that
     it is  prudent,  it also may invest  assets in  non-leveraged  futures  and
     options.  "Non-leveraged" means that the fund may not invest in futures and
     options  where it would be  possible  to lose more than the fund  invested.
     Futures and options can help the fund's  cash assets  remain  liquid  while
     performing more like stocks.

        Additional  information  about Growth's  investments is available in its
     annual and semiannual  reports. In these reports you will find a discussion
     of the market  conditions  and  investment  strategies  that  significantly
     affected the fund's  performance  during the most recent six-month  period.
     You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of Growth's  shares  depends on the value of the stocks and other
     securities it owns. The value of the individual securities Growth owns will
     go up and down  depending on the  performance  of the companies that issued
     them, general market and economic conditions, and investor confidence.

    *The fund advisor will buy a large amount of a company's stock quickly,  and
     often will  dispose of it quickly if the  company's  earnings  or  revenues
     decline. While the fund advisor believes this strategy provides substantial
     appreciation  potential over the long term, in the short term it can create
     a significant  amount of share price  volatility.  This  volatility  can be
     greater than that of the average stock fund.

    *As with all funds,  at any given  time,  the value of your shares of Growth
     may be worth more or less than the price you paid.  If you sell your shares
     when the value is less than the price you paid, you will lose money.

    *An  investment  in the fund is not a bank  deposit,  nor is it  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government agency.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

    *Although  the fund  advisor  invests the fund's  assets  primarily  in U.S.
     stocks,  Growth can invest in  securities  of  foreign  companies.  Foreign
     securities  can  have  certain  unique  risks,  including  fluctuations  in
     currency  exchange  rates,  unstable  political  and  economic  structures,
     reduced  availability of public  information and lack of uniform  financial
     reporting  and  regulatory  practices  similar  to those that apply to U.S.
     issuers.

        In summary,  Growth is intended for investors who seek long-term capital
     growth through an aggressive  equity fund and who are willing to accept the
     risks associated with the fund's investment strategy.


GROWTH                                              AMERICAN CENTURY INVESTMENTS


FUND PERFORMANCE

        The  following  bar  chart  shows the  actual  performance  of  Growth's
     Investor Class shares for each of the last 10 calendar years. The bar chart
     indicates  the  volatility  of the fund's  historical  returns from year to
     year.  Neither the bar chart nor the  performance  information  below it is
     intended to indicate how the fund will perform in the future.


[bar chart]

CALENDAR YEAR-BY-YEAR RETURNS
              1988   1989   1990   1991   1992  1993   1994   1995   1996   1997
Growth        2.72  43.13  -3.85  69.02  -4.29  3.76  -1.49  20.35  15.01  29.28

As of September 30, 1998, the end of the most recent calendar quarter,  Growth's
year-to-date return was 13.54%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar quarter since January 1, 1988, are provided in the following chart
     to  indicate  the fund's  historical  short-term  volatility.  Shareholders
     should be aware,  however,  that Growth is intended  for  investors  with a
     long-term investment horizon and is not managed for short-term results.


[bar chart]

     Highest and Lowest Quarterly Returns
        Quarter Ended 3/31/91     28.45%
        Quarter Ended 9/30/90    -19.44%

        The  following  table  shows the  average  annual  return of the  fund's
     Investor  Class shares for the periods  indicated.  The Russell 1000 Growth
     Index, an unmanaged index that reflects no operating  costs, is included as
     a benchmark for long-term performance comparisons.

                                           1 YEAR        5 YEARS        10 YEARS
     AVERAGE ANNUAL TOTAL RETURNS  (PERIOD ENDED SEPTEMBER 30, 1998)
         Growth                             9.91%          14.80%         16.93%
         Russell 1000 Growth Index         11.11%          20.80%         18.07%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American  Century funds
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
          Management Fee                                 1.00%
          Distribution and Service (12b-1) Fees          None
          Other Expenses(1)                              0.00%
          Total Annual Fund Operating Expenses           1.00%

       (1)Other  expenses,  which  include  the fees and  expenses of the fund's
       independent  directors,  their legal counsel,  interest and extraordinary
       expenses, were less than 0.005% for the most recent fiscal year.

          EXAMPLE OF HYPOTHETICAL FUND COSTS
             Assuming you . . .
             * invest $10,000 in the fund
             * redeem your shares at the end of the periods shown below 
             * earn a 5% return each year 
             * incur the same fund operating  expenses shown above
              . . . your cost of investing in the fund would be:

          1 year            3 years          5 years           10 years
          -------------------------------------------------------------
           $102               $318             $551             $1,219

              Of course,  actual costs may be higher or lower.  Use this example
              to compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage its mutual funds.  The portfolio  managers on the Growth
     team are:

        C. KIM GOODWIN,  Vice President and Portfolio Manager, has been a member
     of the team that manages Growth since joining  American  Century in October
     1997. Before joining American Century,  she served as Senior Vice President
     and Portfolio Manager at Putnam Investments from May 1996 to September 1997
     and Vice  President and Portfolio  Manager at Prudential  Investments  from
     February 1993 to April 1996.


FUND PROFILE                                                             GROWTH


        GREGORY J. WOODHAMS,  Portfolio  Manager,  has been a member of the team
     that manages Growth since May 1998. He joined American Century in September
     1997 as an Investment  Analyst.  Before joining American Century, he served
     as Vice President and Director of Equity  Research for Texas Commerce Bank,
     a subsidiary of Chase Manhattan Bank.

6. HOW DO I BUY FUND SHARES?

     * Complete and return the enclosed application

     * Call us and exchange shares from another American Century fund

     * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts),  unless you establish an automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls   below  this   account   minimum,   your   shares  may  be  redeemed
     involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or  calling  us. You also may  exchange  your  shares in Growth for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Growth  pays  distributions  of  substantially  all  of its  income  and
     realized capital gains once a year, usually in December.  Distributions may
     be taxable as ordinary  income,  capital gains or a combination of the two.
     Capital gains are taxed at different  rates depending on the length of time
     the fund held the securities that were sold.  Distributions  are reinvested
     automatically in additional shares unless you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

     * telephone transactions

     * wire and electronic funds transfers

     * 24-hour Automated Information Line transactions

     * 24-hour online Internet account access and transactions

        You will find more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds and  redeem  them  will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

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

[american century logo(reg.sm)]
            American           
            Century            

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                        Funds Distributor, Inc.

SH-BRO-13869   9810
<PAGE>
                                  FUND PROFILE

                                     Select

                                 INVESTOR CLASS

                               September 30, 1998

                        [american century logo(reg.sm)]
                                    American
                                     Century

     This profile summarizes key information about the fund that is included
         in the fund's Prospectus. The fund's Prospectus has additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
         accessing our Web site or visiting one of our Investor Centers.
      See the back cover for additional telephone numbers and our address.

                             TWENTIETH CENTURY GROUP


                          AMERICAN CENTURY INVESTMENTS

                                     SELECT

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Select seeks long-term  capital growth by investing  primarily in common
     stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund advisor  looks for stocks of large  companies  that it believes
     will increase in value over time. Eighty percent of Select's assets must be
     invested in securities  of companies  that pay regular  dividends,  or have
     committed to pay dividends,  or otherwise produce income. This reflects the
     fund  advisor's  strategy to buy stocks of  companies  that are  successful
     enough to pay  dividends.  The amount of dividends may not be  significant,
     however,  since  stocks are not picked based upon the amount of income they
     produce.  The  remaining  20% of fund  assets may be  invested in any other
     stocks,  bonds or cash that the fund  advisor  believes  will help the fund
     achieve its objective.

        The fund advisor uses a growth investment strategy developed by American
     Century that looks for companies  whose  earnings and revenues are not only
     growing,  but growing at a  successively  faster,  or  accelerating,  pace.
     Accelerating  growth is shown,  for example,  by growth that is faster this
     quarter than last and faster this year than the year before.

        Using American Century's  extensive computer database,  the fund advisor
     tracks  financial  information  for  thousands of companies to research and
     select the stocks it believes will be able to sustain  accelerating growth.
     This strategy is based on the premise that,  over the long term, the stocks
     of   companies   with   accelerating   earnings   and   revenues   have   a
     greater-than-average   chance  to  increase  in  value.   This   aggressive
     investment  strategy,  which pursues  superior  long-term  returns for fund
     shareholders, also results in the risks described in the next section.

        The fund  advisor  does not  attempt  to time the  market.  Instead,  it
     intends to keep Select  essentially  fully invested in stocks regardless of
     the movement of stock prices generally. When the fund advisor believes that
     it is  prudent,  it also may invest  assets in  non-leveraged  futures  and
     options.  "Non-leveraged" means that the fund may not invest in futures and
     options  where it would be  possible  to lose more than the fund  invested.
     Futures and options can help the fund's  cash assets  remain  liquid  while
     performing more like stocks.

        Additional  information  about Select's  investments is available in its
     annual and semiannual  reports. In these reports you will find a discussion
     of the market  conditions  and  investment  strategies  that  significantly
     affected the fund's  performance  during the most recent six-month  period.
     You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of Select's  shares  depends on the value of the stocks and other
     securities it owns. The value of the individual securities Select owns will
     go up and down  depending on the  performance  of the companies that issued
     them, general market and economic conditions, and investor confidence.

    *The fund advisor will buy a large amount of a company's stock quickly,  and
     often will  dispose of it quickly if the  company's  earnings  or  revenues
     decline. While the fund advisor believes this strategy provides substantial
     appreciation  potential over the long term, in the short term it can create
     a significant  amount of share price  volatility.  This  volatility  can be
     greater than that of the average stock fund.

    *As with all funds,  at any given  time,  the value of your shares of Select
     may be worth more or less than the price you paid.  If you sell your shares
     when the value is less than the price you paid, you will lose money.

    *An  investment  in the fund is not a bank  deposit,  nor is it  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government agency.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

    *Although  the fund  advisor  invests the fund's  assets  primarily  in U.S.
     stocks,  Select can invest in  securities  of  foreign  companies.  Foreign
     securities  can  have  certain  unique  risks,  including  fluctuations  in
     currency  exchange  rates,  unstable  political  and  economic  structures,
     reduced  availability of public  information and lack of uniform  financial
     reporting  and  regulatory  practices  similar  to those that apply to U.S.
     issuers.


SELECT                                              AMERICAN CENTURY INVESTMENTS


        In summary,  Select is intended for investors who seek long-term capital
     growth through an aggressive  equity fund and who are willing to accept the
     risks associated with the fund's investment strategy.

FUND PERFORMANCE

        The  following  bar  chart  shows the  actual  performance  of  Select's
     Investor Class shares for each of the last 10 calendar years. The bar chart
     indicates  the  volatility  of the fund's  historical  returns from year to
     year.  Neither the bar chart nor the  performance  information  below it is
     intended to indicate how the fund will perform in the future.


[bar chart]

CALENDAR YEAR-BY-YEAR RETURNS
             1988   1989   1990   1991   1992   1993   1994   1995   1996   1997
Select       5.61  39.51  -0.41  31.58  -4.45  14.67  -8.04  22.67  19.22  32.19

As of September 30, 1998, the end of the most recent calendar quarter,  Select's
year-to-date return was 10.92%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar quarter since January 1, 1988, are provided in the following chart
     to  indicate  the fund's  historical  short-term  volatility.  Shareholders
     should be aware,  however,  that Select is intended  for  investors  with a
     long-term investment horizon and is not managed for short-term results.


[bar chart]

     Highest and Lowest Quarterly Returns
          Quarter Ended 6/30/97      19.43%
          Quarter Ended 9/30/90     -13.12%

        The  following  table  shows the  average  annual  return of the  fund's
     Investor  Class  shares for the periods  indicated.  The S&P 500 Index,  an
     unmanaged  index  that  reflects  no  operating  costs,  is  included  as a
     benchmark for long-term  performance  comparisons because it is viewed as a
     proxy for the entire U.S. stock market.

                                       1 YEAR          5 YEARS          10 YEARS
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
        Select                         13.39%           14.21%            14.80%
        S&P 500 Index                   9.02%           19.87%            17.24%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American  Century funds
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
          Management Fee                                 1.00%
          Distribution and Service (12b-1) Fees          None
          Other Expenses(1)                              0.00%
          Total Annual Fund Operating Expenses           1.00%

       (1)Other  expenses,  which  include  the fees and  expenses of the fund's
       independent  directors,  their legal counsel,  interest and extraordinary
       expenses, were less than 0.005% for the most recent fiscal year.

          EXAMPLE OF HYPOTHETICAL FUND COSTS
             Assuming you . . .
             * invest $10,000 in the fund
             * redeem your shares at the end of the periods shown below 
             * earn a 5% return each year 
             * incur the same fund operating  expenses shown above
                 . . . your cost of investing in the fund would be:


          1 year            3 years          5 years           10 years
          -------------------------------------------------------------
           $102              $318              $551             $1,219

            Of course,  actual costs may be higher or lower. Use this example to
            compare the costs of investing in other funds.

5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage its mutual funds.  The portfolio  managers on the Select
     team are:


FUND PROFILE                                                             SELECT


        JEAN C. LEDFORD, Vice President and Portfolio Manager, has been a member
     of the team that manages Select since joining  American  Century in January
     1997.  Prior to  joining  American  Century,  she  worked  for the State of
     Wisconsin Investment Board as an Investment Director from 1994 to 1996, and
     as an Assistant Investment Director from 1983 to 1994.

        RICHARD S. WELSH,  Portfolio Manager, has been a member of the team that
     manages Select since May 1998. He joined American Century in August 1994 as
     an Equity  Research  Analyst  and was  promoted  to  Investment  Analyst in
     January  1997.  Prior to  joining  American  Century,  he  served as Equity
     Research Analyst for Brown Brothers Harriman & Company.

6. HOW DO I BUY FUND SHARES?

     * Complete and return the enclosed application

     * Call us and exchange shares from another American Century fund

     * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts),  unless you establish an automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls   below  this   account   minimum,   your   shares  may  be  redeemed
     involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or  calling  us. You also may  exchange  your  shares in Select for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Select  pays  distributions  of  substantially  all  of its  income  and
     realized capital gains once a year, usually in December.  Distributions may
     be taxable as ordinary  income,  capital gains or a combination of the two.
     Capital gains are taxed at different  rates depending on the length of time
     the fund held the securities that were sold.  Distributions  are reinvested
     automatically in additional shares unless you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

     * telephone transactions

     * wire and electronic funds transfers

     * 24-hour Automated Information Line transactions

     * 24-hour online Internet account access and transactions

        You will find more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds and  redeem  them  will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

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

[american century logo(reg.sm)]
            American           
            Century            

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                        Funds Distributor, Inc.

SH-BRO-13870   9810
<PAGE>
                                  FUND PROFILE

                                    Heritage

                                 INVESTOR CLASS

                               September 30, 1998

                        [american century logo(reg.sm)]
                                    American
                                     Century

     This profile summarizes key information about the fund that is included
         in the fund's Prospectus. The fund's Prospectus has additional
    information about the fund, including a more detailed description of the
         risks associated with investing in the fund, that you may want
     to consider before you invest. You may obtain the Prospectus and other
     information about the fund at no cost by calling us at 1-800-345-2021,
         accessing our Web site or visiting one of our Investor Centers.
      See the back cover for additional telephone numbers and our address.

                             TWENTIETH CENTURY GROUP


                          AMERICAN CENTURY INVESTMENTS

                                    HERITAGE

1. WHAT IS THE FUND'S INVESTMENT OBJECTIVE?

        Heritage seeks long-term capital growth by investing primarily in common
     stocks.

2. WHAT IS THE FUND'S INVESTMENT STRATEGY?

        The fund  advisor  looks for stocks of companies  that it believes  will
     increase in value over time.  A majority of the stocks  selected are issued
     by medium- and smaller-sized companies,  although the fund may own stock of
     larger companies,  too. Sixty percent of Heritage's assets must be invested
     in securities of companies that pay regular dividends, or have committed to
     pay dividends,  or otherwise produce income.  This signals an intent to buy
     stocks of companies that are successful enough to pay dividends. The amount
     of dividends may not be significant,  however,  since stocks are not picked
     based upon the amount of income they  produce.  The  remaining  40% of fund
     assets may be invested in any other  permissible  securities  that the fund
     advisor believes will help the fund achieve its objective.

        The fund advisor uses a growth investment strategy developed by American
     Century that looks for companies  whose  earnings and revenues are not only
     growing,  but growing at a  successively  faster,  or  accelerating,  pace.
     Accelerating  growth is shown,  for example,  by growth that is faster this
     quarter than last and faster this year than the year before.

        Using American Century's  extensive computer database,  the fund advisor
     tracks  financial  information  for  thousands of companies to research and
     select the stocks it believes will be able to sustain  accelerating growth.
     This strategy is based on the premise that,  over the long term, the stocks
     of   companies   with   accelerating   earnings   and   revenues   have   a
     greater-than-average   chance  to  increase  in  value.   This   aggressive
     investment  strategy,  which pursues  superior  long-term  returns for fund
     shareholders, also results in the risks described in the next section.

        The fund  advisor  does not  attempt  to time the  market.  Instead,  it
     intends to keep Heritage essentially fully invested in stocks regardless of
     the movement of stock prices generally. When the fund advisor believes that
     it is  prudent,  it also may invest  assets in  non-leveraged  futures  and
     options.  "Non-leveraged" means that the fund may not invest in futures and
     options  where it would be  possible  to lose more than the fund  invested.
     Futures and options can help the fund's  cash assets  remain  liquid  while
     performing more like stocks.

        Additional  information about Heritage's investments is available in its
     annual and semiannual  reports. In these reports you will find a discussion
     of the market  conditions  and  investment  strategies  that  significantly
     affected the fund's  performance  during the most recent six-month  period.
     You may get these reports at no cost by calling us.

3. WHAT ARE THE SIGNIFICANT RISKS OF INVESTING IN THE FUND?

    *The value of  Heritage's  shares  depends  on the value of the  stocks  and
     other securities it owns. The value of the individual  securities  Heritage
     owns will go up and down depending on the performance of the companies that
     issued  them,  general  market  and  economic   conditions,   and  investor
     confidence.

    *The fund advisor will buy a large amount of a company's stock quickly,  and
     often will  dispose of it quickly if the  company's  earnings  or  revenues
     decline. While the fund advisor believes this strategy provides significant
     appreciation  potential over the long term, in the short term it can create
     a significant  amount of share price  volatility.  This  volatility  can be
     greater than that of the average stock fund.

    *As with all funds,  at any given time, the value of your shares of Heritage
     may be worth more or less than the price you paid.  If you sell your shares
     when the value is less than the price you paid, you will lose money.

    *An  investment  in the fund is not a bank  deposit,  nor is it  insured  or
     guaranteed  by the  Federal  Deposit  Insurance  Corporation  or any  other
     government agency.

    *Although the fund can purchase  securities  of any size  company,  the fund
     advisor  will tend to invest in medium- and  smaller-sized  companies  with
     smaller share trading volume.

    *Market  performance  tends  to be  cyclical,  and  in the  various  cycles,
     certain  investment  styles may fall in and out of favor.  If the market is
     not  favoring the fund's  style,  the fund's gains may not be as big as, or
     its  losses  may  be  bigger  than,  other  equity  funds  using  different
     investment styles.

    *In times of rapid market expansion,  the fund's holdings in dividend-paying
     stocks may dampen its performance.


HERITAGE                                            AMERICAN CENTURY INVESTMENTS


    *Although  the fund  advisor  invests the fund's  assets  primarily  in U.S.
     stocks,  Heritage can invest in  securities of foreign  companies.  Foreign
     securities  can  have  certain  unique  risks,  including  fluctuations  in
     currency  exchange  rates,  unstable  political  and  economic  structures,
     reduced  availability of public  information and lack of uniform  financial
     reporting  and  regulatory  practices  similar  to those that apply to U.S.
     issuers.

        In summary,  Heritage  is  intended  for  investors  who seek  long-term
     capital  growth  through an  aggressive  equity fund and who are willing to
     accept the risks associated with the fund's investment strategy.

     FUND PERFORMANCE

        The  following  bar chart  shows the actual  performance  of  Heritage's
     Investor Class shares for each of the last 10 calendar years. The bar chart
     indicates  the  volatility  of the fund's  historical  returns from year to
     year.  Neither the bar chart nor the  performance  information  below it is
     intended to indicate how the fund will perform in the future.


[bar chart]

CALENDAR YEAR-BY-YEAR RETURNS
             1988   1989   1990   1991   1992   1993   1994   1995   1996   1997
Heritage    16.43  35.06  -9.16  35.98  10.13  20.43  -6.32  26.66  15.31  19.35

As of  September  30,  1998,  the  end  of the  most  recent  calendar  quarter,
Heritage's year-to-date return was -15.13%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar quarter since January 1, 1988, are provided in the following chart
     to  indicate  the fund's  historical  short-term  volatility.  Shareholders
     should be aware,  however,  that Heritage is intended for investors  with a
     long-term investment horizon and is not managed for short-term results.


[bar chart]

     Highest and Lowest Quarterly Returns
          Quarter Ended 3/31/91      17.28%
          Quarter Ended 9/30/98     -21.16%

        The  following  table  shows the  average  annual  return of the  fund's
     Investor  Class  shares for the periods  indicated.  The S&P 400 Index,  an
     unmanaged  index  that  reflects  no  operating  costs,  is  included  as a
     benchmark for long-term  performance  comparisons because it is viewed as a
     proxy for the mid-cap  market.  The companies  comprising the index are, on
     average,  larger than the companies in which the fund invests. As a result,
     differences in performance can be expected.

                                         1 YEAR         5 YEARS         10 YEARS
     AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED SEPTEMBER 30, 1998)
          Heritage                      -22.47%          6.84%           12.09%
          S&P 400 Index                  -6.07%         13.74%           16.71%

4. WHAT ARE THE FUND'S FEES AND EXPENSES?

        There  are no sales  loads,  fees or other  charges  to buy fund  shares
     directly from American Century, to reinvest dividends in additional shares,
     to exchange into the Investor Class shares of other American  Century funds
     or to redeem  your  shares.  The  following  table  describes  the fees and
     expenses that you may pay if you buy and hold shares of the fund.

     ANNUAL FUND OPERATING EXPENSES
     (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)
          Management Fee                                 1.00%
          Distribution and Service (12b-1) Fees          None
          Other Expenses(1)                              0.00%
          Total Annual Fund Operating Expenses           1.00%

       (1)Other  expenses,  which  include  the fees and  expenses of the fund's
       independent  directors,  their legal counsel,  interest and extraordinary
       expenses, were less than 0.005% for the most recent fiscal year.

          EXAMPLE OF HYPOTHETICAL FUND COSTS
             Assuming you . . .
             * invest $10,000 in the fund
             * redeem your shares at the end of the periods shown below 
             * earn a 5% return each year 
             * incur the same fund operating  expenses shown above
              . . . your cost of investing in the fund would be:

          1 year             3 years           5 years            10 years
          ----------------------------------------------------------------
           $102                $318              $551              $1,219

              Of course,  actual costs may be higher or lower.  Use this example
              to compare the costs of investing in other funds.


FUND PROFILE                                                            HERITAGE


5. WHO ARE THE FUND'S INVESTMENT ADVISOR AND PORTFOLIO MANAGERS?

        American  Century  Investment   Management,   Inc.  provides  investment
     advisory and management  services for the fund. American Century uses teams
     of portfolio  managers,  assistant  portfolio managers and analysts working
     together to manage its mutual funds. The portfolio managers on the Heritage
     team are:

        LINDA K. PETERSON, Portfolio Manager, has been a member of the team that
     manages Heritage since March 1998. She joined American Century in 1986. She
     served as an  Investment  Analyst for  American  Century's  growth-oriented
     equity funds, including Heritage, from April 1994 until February 1998.

        HAROLD S. BRADLEY,  Vice  President and  Portfolio  Manager,  has been a
     member  of the team that  manages  Heritage  since  March  1998.  He joined
     American  Century in 1988 and for the past 10 years, has managed the global
     equity,  futures and  foreign  exchange  trading  activities  for  American
     Century.

6. HOW DO I BUY FUND SHARES?

     * Complete and return the enclosed application

     * Call us and exchange shares from another American Century fund

     * Call us and send your investment by bank wire transfer

        Your initial  investment must be at least $2,500 ($1,000 for traditional
     IRAs, Roth IRAs and UGMA/UTMA accounts),  unless you establish an automatic
     investment  plan of at least $50 per  month.  If the value of your  account
     falls   below  this   account   minimum,   your   shares  may  be  redeemed
     involuntarily.

7. HOW DO I SELL FUND SHARES?

        You may sell all or part of your  fund  shares  on any  business  day by
     writing or calling us. You also may  exchange  your shares in Heritage  for
     shares  in  nearly 70 other  mutual  funds  offered  by  American  Century.
     Depending  on the  options  you  select  when you open your  account,  some
     restrictions  may apply.  For your  protection,  some  redemption  requests
     require a signature guarantee.

8. HOW ARE FUND DISTRIBUTIONS MADE AND TAXED?

        Heritage  pays  distributions  of  substantially  all of its  income and
     realized capital gains once a year, usually in December.  Distributions may
     be taxable as ordinary  income,  capital gains or a combination of the two.
     Capital gains are taxed at different  rates depending on the length of time
     the fund held the securities that were sold.  Distributions  are reinvested
     automatically in additional shares unless you choose another option.

9. WHAT SERVICES ARE AVAILABLE?

        American Century offers several ways to make it easier for you to manage
     your account, such as:

     * telephone transactions

     * wire and electronic funds transfers

     * 24-hour Automated Information Line transactions

     * 24-hour online Internet account access and transactions

        You will find more  information  about  these  choices  in our  Investor
     Services Guide, which you may request by calling us, accessing our Web site
     or visiting one of our Investor Centers.

        Information  contained  in  our  Investor  Services  Guide  pertains  to
     shareholders  who invest directly with American Century rather than through
     an employer-sponsored retirement plan or through a financial intermediary.

        If  you  own  or are  considering  purchasing  fund  shares  through  an
     employer-sponsored retirement plan or financial intermediary,  your ability
     to purchase shares of the fund,  exchange them for shares of other American
     Century  funds and  redeem  them  will  depend on the terms of your plan or
     financial  intermediary.  If  you  have  questions  about  investing  in an
     employer-sponsored  retirement  plan or through a  financial  intermediary,
     call an Institutional Service Representative at 1-800-345-3533.

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

[american century logo(reg.sm)]
            American           
            Century            

AMERICAN CENTURY INVESTMENTS
P.O. BOX 419200
KANSAS CITY, MISSOURI 64141-6200

WWW.AMERICANCENTURY.COM

INVESTOR SERVICES
1-800-345-2021 or 816-531-5575

AUTOMATED INFORMATION LINE
1-800-345-8765

INSTITUTIONAL, CORPORATE, KEOGH, SEP/SARSEP,
SIMPLE AND 403(B) SERVICES
1-800-345-3533

TELECOMMUNICATIONS DEVICE FOR THE DEAF
1-800-634-4113 or 816-444-3485

FAX
816-340-7962

                                                         Funds Distributor, Inc.

SH-BRO-13871   9810


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