AMERICAN CENTURY MUTUAL FUNDS INC
497K2, 1998-08-13
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                                  FUND PROFILE


                                     Select

                                 INVESTOR CLASS

                                 August 10, 1998


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

- --------------------------------------------------------------------------------
   This profile summarizes key information about the fund that is included in
        the fund's Prospectus. The fund's Prospectus includes 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 phone 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 managers look for stocks of large  companies  that they believe
     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 our
     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,  cash or
     bonds  that the fund  managers  believe  will  help  the fund  achieve  its
     objective.

        The managers use 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 managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  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  managers  do not  attempt to time the  market.  Instead,  they
     intend to keep Select  essentially  fully invested in stocks  regardless of
     the movement of stock prices  generally.  When the managers believe that it
     is  prudent,  they 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  managers  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 we believe 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.
     Additionally,  an investment  in the fund is not a bank deposit,  nor is it
     insured  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  managers  invest 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,  political  and economic  developments,  reduced
     availability  of public  information  and the fact that foreign issuers are
     not  required  to abide  by the  same  financial  reporting  or  regulatory
     practices as U.S. issuers.


Select                                             American Century Investments


     FUND PERFORMANCE

        The bar chart below shows the actual  performance  of Select's  Investor
     Class  shares for each of the last 10  calendar  years.  It  indicates  the
     volatility of the fund's historical  returns from year to year.  Neither it
     nor the quarterly  information  below the bar chart 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
     5.61    39.51  -0.41   31.58  -4.45    14.67  -8.04   22.67   19.22   32.19

     As of June 30, 1998, the end of the most recent calendar quarter,  Select's
     year-to-date return was 19.82%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's potential 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 table below 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 YR.          5 YRS.          10 YRS.
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
                  Select               30.65%          17.39%          15.28%
                  S&P 500 Index        30.03%          23.03%          18.50%

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
                  ----------------------------------------------------
                  $100          $320           $550           $1,220

               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 our mutual funds.  The portfolio  managers on the Select
     team are:

        JEAN C. LEDFORD,  Vice President and Portfolio Manager,  joined American
     Century  as a manager  of  Select  in  January  of 1997.  Prior to  joining
     American Century,  Ms. Ledford 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).


Fund Profile                                                             Select


        RICHARD S. WELSH,  Portfolio Manager,  joined American Century in August
     1994 as an Equity Research  Analyst and was promoted to Investment  Analyst
     in January 1997. In May 1998, he was promoted to Portfolio  Manager.  Prior
     to joining  American  Century,  Mr. Welsh 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 $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 the 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 may 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(reg.tm)


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.
                                 (c) 1998 American Century Services Corporation

SH-BRO-12614   9808
<PAGE>
                                  FUND PROFILE


                                     Growth

                                 INVESTOR CLASS

                                 August 10, 1998

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

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes 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 phone 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 managers  look for large company  stocks that they believe will
     increase  in value  over  time.  The  managers  use 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 managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  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  managers  do not  attempt to time the  market.  Instead,  they
     intend to keep Growth  essentially  fully invested in stocks  regardless of
     the movement of stock prices  generally.  When the managers believe that it
     is  prudent,  they 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  managers  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 we believe 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.
     Additionally,  an investment  in the fund is not a bank deposit,  nor is it
     insured  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  managers  invest 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,  political  and economic  developments,  reduced
     availability  of public  information  and the fact that foreign issuers are
     not  required  to abide  by the  same  financial  reporting  or  regulatory
     practices as 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 bar chart below shows the actual  performance  of Growth's  Investor
     Class  shares for each of the last 10  calendar  years.  It  indicates  the
     volatility of the fund's historical  returns from year to year.  Neither it
     nor the quarterly  information  below the bar chart 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
    2.72    43.13  -3.85   69.02  -4.29    3.76   -1.49    20.35   15.01   29.28

     As of June 30, 1998, the end of the most recent calendar quarter,  Growth's
     year-to-date return was 23.37%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's potential 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 table below 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 YR.        5 YRS.       10 YRS.
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
          Growth                          35.57%        18.20%       16.92%
          Russell 1000 Growth Index       31.39%        23.48%       19.15%

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
          -------------------------------------------------
            $100       $320         $550          $1,220

               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 our mutual funds.  The portfolio  managers on the Growth
     team are:

        C. KIM GOODWIN,  Vice President and Portfolio  Manager,  joined American
     Century as a manager of Growth in October  1997.  Before  joining  American
     Century,  Ms. Goodwin 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,  joined  American  Century in
     September  1997 as an Investment  Analyst.  In May 1998, he was promoted to
     Portfolio Manager.  Before joining American Century, Mr. Woodhams 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 $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 the 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 may 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(reg.tm)


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.
                                 (c) 1998 American Century Services Corporation

SH-BRO-12613   9808
<PAGE>
                                  FUND PROFILE


                                      Ultra

                                 INVESTOR CLASS

                                 August 10, 1998

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

- --------------------------------------------------------------------------------
     This profile summarizes key information about the fund that is included
       in the fund's Prospectus. The fund's Prospectus includes 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 phone 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 managers look for stocks of medium to large companies that they
     believe  will  increase  in value over time.  The  managers  use 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 managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  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  managers  do not  attempt to time the  market.  Instead,  they
     intend to keep Ultra essentially fully invested in stocks regardless of the
     movement of stock prices  generally.  When the managers  believe that it is
     prudent,  they 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  managers  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 we believe 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.
     Additionally,  an investment  in the fund is not a bank deposit,  nor is it
     insured  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  managers  invest 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,  political  and economic  developments,  reduced
     availability  of public  information  and the fact that foreign issuers are
     not  required  to abide  by the  same  financial  reporting  or  regulatory
     practices as 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 bar chart below  shows the actual  performance  of Ultra's  Investor
     Class  shares for each of the last 10  calendar  years.  It  indicates  the
     volatility of the fund's historical  returns from year to year.  Neither it
     nor the  quarterly  information  below 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
     13.32   36.94   9.36   86.45   1.27   21.81  -3.62   37.68  13.85  23.13

     As of June 30, 1998, the end of the most recent calendar  quarter,  Ultra's
     year-to-date return was 23.99%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's potential 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 table below 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 YR.        5 YRS.       10 YRS.
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
           Ultra                          31.15%        19.79%        22.14%
           S&P 500 Index                  30.03%        23.03%        18.50%

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
  ------------------------------------------------------------
    $100            $320            $550           $1,220

              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 our 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 manager of Ultra and other American  Century
     growth-oriented funds in 1981.


Fund Profile                                                               Ultra


        JOHN R. SYKORA,  Portfolio Manager,  joined American Century in May 1994
     as an  Investment  Analyst.  In August  1997,  he was promoted to Portfolio
     Manager of Ultra.  Before joining American Century,  Mr. Sykora 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,  joined  American  Century  in
     September 1994 as an Investment  Analyst.  In July 1996, he was promoted to
     Portfolio Manager of Ultra.  Before joining American Century,  Mr. Wimberly
     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 $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 the 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 may 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(reg.tm)


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.
                                (c) 1998 American Century Services Corporation

SH-BRO-12611   9808
<PAGE>
                                  FUND PROFILE


                                      Vista

                                 INVESTOR CLASS

                                 August 10, 1998

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

- --------------------------------------------------------------------------------
    This profile summarizes key information about the fund that is included
      in the fund's Prospectus. The fund's Prospectus includes 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 phone 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 managers look for stocks of medium- and smaller-sized companies
     that they  believe  will  increase in value over time.  The  managers use 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 managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  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  managers  do not  attempt to time the  market.  Instead,  they
     intend to keep Vista essentially fully invested in stocks regardless of the
     movement of stock prices  generally.  When the managers  believe that it is
     prudent,  they 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  managers  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 we believe 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.
     Additionally,  an investment  in the fund is not a bank deposit,  nor is it
     insured  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  managers  invest 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,  political  and economic  developments,  reduced
     availability  of public  information  and the fact that foreign issuers are
     not  required  to abide  by the  same  financial  reporting  or  regulatory
     practices as 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 bar chart below  shows the actual  performance  of Vista's  Investor
     Class  shares for each of the last 10  calendar  years.  It  indicates  the
     volatility of the fund's historical  returns from year to year.  Neither it
     nor the quarterly  information  below the bar chart 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
      2.44   52.20  -15.73  73.69  -2.13   5.45   4.68   46.13  7.56  -8.68

     As of June 30, 1998, the end of the most recent calendar  quarter,  Vista's
     year-to-date return was 4.75%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's potential 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 table in the next  column  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 YR.      5 YRS.       10 YRS.
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
        Vista                            2.06%      10.26%        12.48%
        Russell 2500 Growth Index        13.44      15.33%        13.62%

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
           --------------------------------------------------
           $100         $320         $550          $1,220

               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 our mutual funds.  The  portfolio  managers on the Vista
     team are:


Fund Profile                                                             Vista


        ARNOLD  K.  DOUVILLE,  Vice  President  and  Portfolio  Manager,  joined
     American  Century  as a  manager  of Vista  and  another  American  Century
     growth-oriented fund in November 1997. Before joining American Century, Mr.
     Douville served as Senior Portfolio  Manager for Munder Capital  Management
     (from September 1989 to October 1997).

        GLENN A. FOGLE,  Vice President and Portfolio  Manager,  joined American
     Century in September 1990 as an Investment  Analyst.  In March 1993, he was
     promoted to Portfolio Manager of Vista.

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 $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 the 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 may 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(reg.tm)


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.
                                 (c) 1998 American Century Services Corporation

SH-BRO-12612   9808
<PAGE>
                                  FUND PROFILE


                                    Heritage

                                 INVESTOR CLASS

                                 August 10, 1998

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

- --------------------------------------------------------------------------------
   This profile summarizes key information about the fund that is included
     in the fund's Prospectus. The fund's Prospectus includes 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 phone 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 managers look for stocks of small- to mid-sized  companies that
     they believe will increase in value over time.  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 managers  believe will help the fund
     achieve its objective.

        The managers use 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 managers track
     financial information for thousands of companies to research and select the
     stocks  they  believe  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  managers  do not  attempt to time the  market.  Instead,  they
     intend to keep Heritage  essentially fully invested in stocks regardless of
     the movement of stock prices  generally.  When the managers believe that it
     is  prudent,  they 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  managers  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 we believe 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.
     Additionally,  an investment  in the fund is not a bank deposit,  nor is it
     insured  by  the  Federal  Deposit  Insurance   Corporation  or  any  other
     government agency.

    *Although the fund can purchase  securities  of any size  company,  the fund
     managers will tend to invest in small- to mid-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  managers  invest 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,  political  and economic  developments,  reduced
     availability  of public  information  and the fact that foreign issuers are
     not  required  to abide  by the  same  financial  reporting  or  regulatory
     practices as U.S. issuers.

     FUND PERFORMANCE

        The bar chart below shows the actual performance of Heritage's  Investor
     Class  shares for each of the last 10  calendar  years.  It  indicates  the
     volatility of the fund's historical  returns from year to year.  Neither it
     nor the quarterly  information  below the bar chart 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
   16.43   35.06  -9.16    35.98   10.13   20.43  -6.32    26.66   15.31   19.35

     As of  June  30,  1998,  the  end  of the  most  recent  calendar  quarter,
     Heritage's year-to-date return was 7.65%.

        The highest and lowest returns of the fund's Investor Class shares for a
     calendar  quarter since January 1, 1988, are provided in the chart below to
     indicate the fund's potential 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 9/30/90      -17.08%

        The table below 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 YR.         5 YRS.         10 YRS.
      AVERAGE ANNUAL TOTAL RETURNS (PERIOD ENDED JUNE 30, 1998)
           Heritage                13.11%        14.15%          14.45%
           S&P 400 Index           27.10%        18.45%          18.36%

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
              -----------------------------------------------------
               $100           $320          $550           $1,220

               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 our mutual funds. The portfolio managers on the Heritage
     team are:

        LINDA K. PETERSON,  Portfolio Manager,  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, when
     she was promoted to Portfolio Manager.

        HAROLD S. BRADLEY, Vice President and Portfolio Manager, joined American
     Century in 1988. For the past 10 years,  Mr. Bradley has managed the global
     equity,  futures and  foreign  exchange  trading  activities  for  American
     Century. He was promoted to Portfolio Manager of the fund in March 1998.

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 $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 the 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 may 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(reg.tm)


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.
                                 (c) 1998 American Century Services Corporation

SH-BRO-12615   9808


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