EXHIBIT (a)(36)



                       AMERICAN CENTURY MUTUAL FUNDS, INC.

                             ARTICLES SUPPLEMENTARY


     AMERICAN CENTURY MUTUAL FUNDS, INC., a Maryland corporation whose principal
Maryland office is located in Baltimore,  Maryland (the  "Corporation"),  hereby
certifies to the State Department of Assessments and Taxation of Maryland that:

     FIRST:  The  Corporation  is  registered  as an open-end  company under the
Investment Company Act of 1940.

     SECOND: Pursuant to authority expressly vested in the Board of Directors by
Article  FIFTH and  Article  SEVENTH of the  Articles  of  Incorporation  of the
Corporation,  the Board of Directors of the Corporation has (i) duly established
new  classes of shares for  several  of the series of the  capital  stock of the
Corporation  and (ii)  increased  in some cases and  decreased in some cases the
number of shares of capital  stock of certain  series that the  Corporation  has
authority to issue in accordance with Section  2-105(c) of the Maryland  General
Corporation Law (the "Reallocation").

     THIRD:  Immediately  prior  to the  Reallocation  the  Corporation  had the
authority to issue Eleven Billion One Hundred Million (11,100,000,000) shares of
capital stock. Following the Reallocation,  the Corporation has the authority to
issue  Eleven  Billion One Hundred  Million  (11,100,000,000)  shares of capital
stock.

     FOURTH:  The par value of shares of the Corporation's  capital stock before
the Reallocation was, and after the Reallocation is, One Cent ($0.01) per share.

     FIFTH:  Immediately prior to the  Reallocation,  the aggregate par value of
all shares of stock that the Corporation was authorized to issue was One Hundred
Eleven Million Dollars ($111,000,000).  After giving effect to the Reallocation,
the  aggregate  par  value of all  shares  of  stock  that  the  Corporation  is
authorized to issue is One Hundred Eleven Million Dollars ($111,000,000).

     SIXTH:  Immediately prior to the Reallocation,  the eighteen (18) Series of
stock of the  Corporation  and the number of shares and  aggregate  par value of
each was as follows:

SERIES                                  NO. OF SHARES       AGGREGATE PAR VALUE
------                                  -------------       -------------------

Growth Fund                             1,310,000,000           $13,100,000
Select Fund                               515,000,000             5,150,000
Ultra Fund                              3,950,000,000            39,500,000
Vista Fund                              1,200,000,000            12,000,000
Heritage Fund                             640,000,000             6,400,000
Giftrust Fund                             200,000,000             2,000,000
Balanced Fund                             265,000,000             2,650,000
New Opportunities Fund                    300,000,000             3,000,000
Capital Value Fund                        265,000,000             2,650,000
Veedot Fund                               300,000,000             3,000,000
Capital Growth Fund                       710,000,000             7,100,000
New Opportunities II Fund                 375,000,000             3,750,000
Fundamental Equity Fund                   460,000,000             4,600,000
Focused Growth Fund                       100,000,000             1,000,000
Small Cap Growth Fund                     155,000,000             1,550,000
Mid Cap Growth Fund                       155,000,000             1,550,000
NT Growth Fund                            100,000,000             1,000,000
NT Vista Fund                             100,000,000             1,000,000





The par  value of each  share of stock in each  Series is One Cent  ($0.01)  per
share.

     SEVENTH:  Immediately prior to the  Reallocation,  the number of shares and
aggregate par value of each allocated among the Classes of shares is as follows:


                                                                      AGGREGATE
SERIES NAME                 CLASS NAME          NO. OF SHARES         PAR VALUE
-----------                 ----------          -------------         ---------

Growth Fund                 Investor              800,000,000        $8,000,000
                            Institutional         150,000,000         1,500,000
                            Advisor               210,000,000         2,100,000
                            R                      50,000,000           500,000
                            C                     100,000,000         1,000,000

Select Fund                 Investor              300,000,000         3,000,000
                            Institutional          40,000,000           400,000
                            Advisor                50,000,000           500,000
                            A                      25,000,000           250,000
                            B                      25,000,000           250,000
                            C                      25,000,000           250,000
                            R                      50,000,000           500,000

Ultra Fund                  Investor            3,500,000,000        35,000,000
                            Institutional         200,000,000         2,000,000
                            Advisor               100,000,000         1,000,000
                            R                      50,000,000           500,000
                            C                     100,000,000         1,000,000

Vista Fund                  Investor              800,000,000         8,000,000
                            Institutional          80,000,000           800,000
                            Advisor               210,000,000         2,100,000
                            C                     100,000,000         1,000,000
                            R                      10,000,000           100,000

Heritage Fund               Investor              400,000,000         4,000,000
                            Institutional          40,000,000           400,000
                            Advisor               100,000,000         1,000,000
                            C                     100,000,000         1,000,000

Giftrust Fund               Investor              200,000,000         2,000,000


Balanced Fund               Investor              200,000,000         2,000,000
                            Institutional          15,000,000           150,000
                            Advisor                50,000,000           500,000

New Opportunities Fund      Investor              300,000,000         3,000,000



                                       2


                                                                      AGGREGATE
SERIES NAME                 CLASS NAME         NO. OF SHARES          PAR VALUE
-----------                 ----------         -------------          ---------

Capital Value Fund          Investor             200,000,000          2,000,000
                            Institutional         15,000,000            150,000
                            Advisor               50,000,000            500,000

Veedot Fund                 Investor             200,000,000          2,000,000
                            Institutional         50,000,000            500,000
                            Advisor               50,000,000            500,000

New Opportunities II Fund   Investor             175,000,000          1,750,000
                            Institutional         50,000,000            500,000
                            A                    100,000,000          1,000,000
                            B                     25,000,000            250,000
                            C                     25,000,000            250,000

Capital Growth Fund         Investor             300,000,000          3,000,000
                            Institutional         50,000,000            500,000
                            R                     60,000,000            600,000
                            A                    100,000,000          1,000,000
                            B                    100,000,000          1,000,000
                            C                    100,000,000          1,000,000

Fundamental Equity Fund     Investor             200,000,000          2,000,000
                            Institutional         50,000,000            500,000
                            R                     60,000,000            600,000
                            A                     50,000,000            500,000
                            B                     50,000,000            500,000
                            C                     50,000,000            500,000

Focused Growth Fund         Investor             100,000,000          1,000,000

Small Cap Growth Fund       Investor              55,000,000            550,000
                            Institutional         50,000,000            500,000
                            A                     20,000,000            200,000
                            B                     10,000,000            100,000
                            C                     10,000,000            100,000
                            R                     10,000,000            100,000

Mid Cap Growth Fund         Investor              55,000,000            550,000
                            Institutional         50,000,000            500,000
                            A                     20,000,000            200,000
                            B                     10,000,000            100,000
                            C                     10,000,000            100,000
                            R                     10,000,000            100,000

NT Growth Fund              Institutional        100,000,000          1,000,000

NT Vista Fund               Institutional        100,000,000          1,000,000



                                       3



     EIGHTH: Pursuant to authority expressly vested in the Board of Directors by
Article  FIFTH and  Article  SEVENTH of the  Articles  of  Incorporation  of the
Corporation,  the Board of Directors of the  Corporation  has  allocated  Eleven
Billion One Hundred  Million  (11,100,000,000)  shares of the Eleven Billion One
Hundred  Million  (11,100,000,000)  shares of  authorized  capital  stock of the
Corporation  among  the  eighteen  (18)  Series of stock of the  Corporation  as
follows:

SERIES                               NO. OF SHARES          AGGREGATE PAR VALUE
------                               -------------          -------------------

Growth Fund                          1,310,000,000              $13,100,000
Select Fund                            515,000,000                5,150,000
Ultra Fund                           3,950,000,000               39,500,000
Vista Fund                           1,200,000,000               12,000,000
Heritage Fund                          640,000,000                6,400,000
Giftrust Fund                          200,000,000                2,000,000
Balanced Fund                          265,000,000                2,650,000
New Opportunities Fund                 300,000,000                3,000,000
Capital Value Fund                     265,000,000                2,650,000
Veedot Fund                            300,000,000                3,000,000
Capital Growth Fund                    710,000,000                7,100,000
New Opportunities II Fund              375,000,000                3,750,000
Fundamental Equity Fund                460,000,000                4,600,000
Focused Growth Fund                    100,000,000                1,000,000
Small Cap Growth Fund                  155,000,000                1,550,000
Mid Cap Growth Fund                    155,000,000                1,550,000
NT Growth Fund                         100,000,000                1,000,000
NT Vista Fund                          100,000,000                1,000,000

     NINTH:  Pursuant to authority expressly vested in the Board of Directors by
Article FIFTH and Article SEVENTH of the Articles of Incorporation, the Board of
Directors of the  Corporation (a) has duly  established  classes of shares (each
hereinafter referred to as a "Class") for the Series of the capital stock of the
Corporation and (b) has allocated the shares designated to the Series in Article
EIGHTH above among the Classes of shares. As a result of the action taken by the
Board of  Directors,  the Classes of shares of the eighteen (18) Series of stock
of the  Corporation  and the number of shares and aggregate par value of each is
as follows:

                                                                      AGGREGATE
SERIES NAME                 CLASS NAME          NO. OF SHARES         PAR VALUE
-----------                 ----------          -------------         ---------

Growth Fund                 Investor              800,000,000        $8,000,000
                            Institutional         150,000,000         1,500,000
                            Advisor               210,000,000         2,100,000
                            R                      50,000,000           500,000
                            C                     100,000,000         1,000,000

Select Fund                 Investor              300,000,000         3,000,000
                            Institutional          40,000,000           400,000
                            A                      75,000,000           750,000
                            B                      25,000,000           250,000
                            C                      25,000,000           250,000
                            R                      50,000,000           500,000



                                       4


                                                                      AGGREGATE
SERIES NAME                 CLASS NAME          NO. OF SHARES         PAR VALUE
-----------                 ----------          -------------         ---------

Ultra Fund                  Investor            3,500,000,000        35,000,000
                            Institutional         200,000,000         2,000,000
                            A                     100,000,000         1,000,000
                            R                      50,000,000           500,000
                            C                      50,000,000           500,000
                            B                      50,000,000           500,000

Vista Fund                  Investor              800,000,000         8,000,000
                            Institutional          80,000,000           800,000
                            Advisor               210,000,000         2,100,000
                            C                     100,000,000         1,000,000
                            R                      10,000,000           100,000

Heritage Fund               Investor              400,000,000         4,000,000
                            Institutional          40,000,000           400,000
                            A                     100,000,000         1,000,000
                            C                      35,000,000           350,000
                            B                      35,000,000           350,000
                            R                      30,000,000           300,000

Giftrust Fund               Investor              200,000,000         2,000,000

Balanced Fund               Investor              200,000,000         2,000,000
                            Institutional          15,000,000           150,000
                            Advisor                50,000,000           500,000

New Opportunities Fund      Investor              300,000,000         3,000,000

Capital Value Fund          Investor              200,000,000         2,000,000
                            Institutional          15,000,000           150,000
                            Advisor                50,000,000           500,000

Veedot Fund                 Investor              200,000,000         2,000,000
                            Institutional         100,000,000         1,000,000

New Opportunities II Fund   Investor              165,000,000         1,650,000
                            Institutional          50,000,000           500,000
                            A                     100,000,000         1,000,000
                            B                      20,000,000           200,000
                            C                      20,000,000           200,000
                            R                      20,000,000           200,000



                                       5


                                                                      AGGREGATE
SERIES NAME                 CLASS NAME          NO. OF SHARES         PAR VALUE
-----------                 ----------          -------------         ---------

Capital Growth Fund         Investor              300,000,000         3,000,000
                            Institutional          50,000,000           500,000
                            R                      60,000,000           600,000
                            A                     100,000,000         1,000,000
                            B                     100,000,000         1,000,000
                            C                     100,000,000         1,000,000

Fundamental Equity Fund     Investor              200,000,000         2,000,000
                            Institutional          50,000,000           500,000
                            R                      60,000,000           600,000
                            A                      50,000,000           500,000
                            B                      50,000,000           500,000
                            C                      50,000,000           500,000

Focused Growth Fund         Investor               50,000,000           500,000
                            Institutional          10,000,000           100,000
                            A                      10,000,000           100,000
                            B                      10,000,000           100,000
                            C                      10,000,000           100,000
                            R                      10,000,000           100,000

Small Cap Growth Fund       Investor               55,000,000           550,000
                            Institutional          50,000,000           500,000
                            A                      20,000,000           200,000
                            B                      10,000,000           100,000
                            C                      10,000,000           100,000
                            R                      10,000,000           100,000

Mid Cap Growth Fund         Investor               55,000,000           550,000
                            Institutional          50,000,000           500,000
                            A                      20,000,000           200,000
                            B                      10,000,000           100,000
                            C                      10,000,000           100,000
                            R                      10,000,000           100,000

NT Growth Fund              Institutional         100,000,000         1,000,000

NT Vista Fund               Institutional         100,000,000         1,000,000

     TENTH:  Except as  otherwise  provided by the express  provisions  of these
Articles  Supplementary,  nothing herein shall limit, by inference or otherwise,
the  discretionary  right of the Board of  Directors to  serialize,  classify or
reclassify and issue any unissued  shares of any Series or Class or any unissued
shares that have not been  allocated  to a Series or Class,  and to fix or alter
all terms thereof,  to the full extent provided by the Articles of Incorporation
of the Corporation.


                                       6



     ELEVENTH: A description of the series and classes of shares,  including the
preferences,   conversion  and  other  rights,   voting  powers,   restrictions,
limitations  as to  dividends,  qualifications,  and  terms and  conditions  for
redemption is set forth in the Articles of  Incorporation of the Corporation and
is not  changed by these  Articles  Supplementary,  except  with  respect to the
creation and/or designation of the various Series.

     TWELFTH: The Board of Directors of the Corporation duly adopted resolutions
dividing into Series and Classes the authorized capital stock of the Corporation
and allocating shares to each as set forth in these Articles Supplementary.

     IN WITNESS WHEREOF,  AMERICAN  CENTURY MUTUAL FUNDS,  INC. has caused these
Articles  Supplementary  to be signed  and  acknowledged  in its name and on its
behalf by its Vice President and attested to by its Assistant  Secretary on this
10th day of September, 2007.

ATTEST:                                   AMERICAN CENTURY MUTUAL FUNDS, INC.


/s/ Otis H. Cowan                         /s/ David H. Reinmiller
---------------------------------         -------------------------------------
Name:   Otis H. Cowan                     Name:   David H. Reinmiller
Title:  Assistant Secretary               Title:  Vice President


     THE UNDERSIGNED Vice President of AMERICAN CENTURY MUTUAL FUNDS,  INC., who
executed on behalf of said Corporation the foregoing  Articles  Supplementary to
the Charter, of which this certificate is made a part, hereby  acknowledges,  in
the  name  of  and  on  behalf  of  said  Corporation,  the  foregoing  Articles
Supplementary  to the Charter to be the corporate act of said  Corporation,  and
further  certifies  that, to the best of his knowledge,  information and belief,
the matters and facts set forth therein with respect to the approval thereof are
true in all material respects under the penalties of perjury.


September 10, 2007                        /s/ David H. Reinmiller
                                          -------------------------------------
                                          David H. Reinmiller, Vice President