UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G
                                (Amendment No. 2)

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                         Ameritrade Holding Corporation
                       ----------------------------------
                                (Name of Issuer)

                     Common Stock, par value $.01 per share
                   ------------------------------------------
                         (Title of Class of Securities)

                                   03074K 10 0
                               ------------------
                                 (CUSIP Number)

                                December 31, 2004
             -------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

    Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

                               [ ] Rule 13d-1(b)
                               [ ] Rule 13d-1(c)
                               [X] Rule 13d-1(d)

      The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act.



CUSIP NO. 03074K 10 0

------------------------------------------------------------------------
(1)  Name of reporting person(s) Bain Capital Fund VII, LLC
                                ------------------
     S.S. or I.R.S. identification nos. of above persons 22-3850292
                                                        ---------------- -------
-------------------------------------------------------------
(2)  Check the appropriate box if a member of a group          |
     (SEE INSTRUCTIONS)                                        | (a) [X]
                                                               | (b) [ ] -------
-------------------------------------------------------------
(3)  SEC USE ONLY

------------------------------------------------------------------------
(4)  Citizenship or place of organization Delaware
------------------------------------------------------------------------
                          (5)    Sole voting power 0
                                                  ----------------------
                         -----------------------------------------------
 Number of shares         (6)    Shared voting power 0
   beneficially                                      -------------------
  owned by each          -----------------------------------------------
    reporting             (7)    Sole dispositive power 0
   person with:                                        -----------------
                         -----------------------------------------------
                          (8)    Shared dispositive power 0
                                                          -------------- -------
-------------------------------------------------------------
(9)  Aggregate amount beneficially owned by each reporting person 0
                                                                  ------ -------
-------------------------------------------------------------
(10) Check box if the aggregate amount in row (9) excludes certain shares  [_]
     (SEE INSTRUCTIONS)
------------------------------------------------------------------------
(11) Percent of class represented by amount in row (9) 0%
                                                       ----------------- -------
-------------------------------------------------------------
(12) Type of reporting person (SEE INSTRUCTIONS) OO - Other
                                                 ----------------------- -------
-------------------------------------------------------------

                                        2



CUSIP NO. 03074K 10 0

------------------------------------------------------------------------
(1)  Name of reporting person(s) Bain Capital VII Coinvestment Fund, LLC
                                ------------------
     S.S. or I.R.S. identification nos. of above persons 22-3850358
                                                        ---------------- -------
-------------------------------------------------------------
(2)  Check the appropriate box if a member of a group          |
     (SEE INSTRUCTIONS)                                        | (a) [X]
                                                               | (b) [ ] -------
-------------------------------------------------------------
(3)  SEC USE ONLY

------------------------------------------------------------------------
(4)  Citizenship or place of organization Delaware
------------------------------------------------------------------------
                          (5)    Sole voting power 0
                                                  ----------------------
                         -----------------------------------------------
 Number of shares         (6)    Shared voting power 0
   beneficially                                      -------------------
  owned by each          -----------------------------------------------
    reporting             (7)    Sole dispositive power 0
   person with:                                        -----------------
                         -----------------------------------------------
                          (8)    Shared dispositive power 0
                                                          -------------- -------
-------------------------------------------------------------
(9)  Aggregate amount beneficially owned by each reporting person 0
                                                                  ------ -------
-------------------------------------------------------------
(10) Check box if the aggregate amount in row (9) excludes certain shares  [_]
     (SEE INSTRUCTIONS)
------------------------------------------------------------------------
(11) Percent of class represented by amount in row (9) 0%
                                                       ----------------- -------
-------------------------------------------------------------
(12) Type of reporting person (SEE INSTRUCTIONS) OO - Other
                                                 ----------------------- -------
-------------------------------------------------------------

                                        3



CUSIP NO. 03074K 10 0

------------------------------------------------------------------------
(1)  Name of reporting person(s) BCI Datek Investors, LLC
                                ------------------
     S.S. or I.R.S. identification nos. of above persons 04-3544765
                                                        ---------------- -------
-------------------------------------------------------------
(2)  Check the appropriate box if a member of a group          |
     (SEE INSTRUCTIONS)                                        | (a) [X]
                                                               | (b) [ ] -------
-------------------------------------------------------------
(3)  SEC USE ONLY

------------------------------------------------------------------------
(4)  Citizenship or place of organization Delaware
------------------------------------------------------------------------
                          (5)    Sole voting power 0
                                                  ----------------------
                         -----------------------------------------------
 Number of shares         (6)    Shared voting power 0
   beneficially                                      -------------------
  owned by each          -----------------------------------------------
    reporting             (7)    Sole dispositive power 0
   person with:                                        -----------------
                         -----------------------------------------------
                          (8)    Shared dispositive power 0
                                                          -------------- -------
-------------------------------------------------------------
(9)  Aggregate amount beneficially owned by each reporting person 0
                                                                  ------ -------
-------------------------------------------------------------
(10) Check box if the aggregate amount in row (9) excludes certain shares  [_]
     (SEE INSTRUCTIONS)
------------------------------------------------------------------------
(11) Percent of class represented by amount in row (9) 0.00%
                                                       ----------------- -------
-------------------------------------------------------------
(12) Type of reporting person (SEE INSTRUCTIONS) OO - Other
                                                 ----------------------- -------
-------------------------------------------------------------

                                        4



CUSIP NO. 03074K 10 0

------------------------------------------------------------------------
(1)  Name of reporting person(s) BCIP Associates II
                                ------------------
     S.S. or I.R.S. identification nos. of above persons 04-3404818
                                                        ---------------- -------
-------------------------------------------------------------
(2)  Check the appropriate box if a member of a group          |
     (SEE INSTRUCTIONS)                                        | (a) [X]
                                                               | (b) [ ] -------
-------------------------------------------------------------
(3)  SEC USE ONLY

------------------------------------------------------------------------
(4)  Citizenship or place of organization Delaware
------------------------------------------------------------------------
                          (5)    Sole voting power 0
                                                  ----------------------
                         -----------------------------------------------
 Number of shares         (6)    Shared voting power 0
   beneficially                                      -------------------
  owned by each          -----------------------------------------------
    reporting             (7)    Sole dispositive power 0
   person with:                                        -----------------
                         -----------------------------------------------
                          (8)    Shared dispositive power 0
                                                          -------------- -------
-------------------------------------------------------------
(9)  Aggregate amount beneficially owned by each reporting person 0
                                                                  ------ -------
-------------------------------------------------------------
(10) Check box if the aggregate amount in row (9) excludes certain shares   [_]
     (SEE INSTRUCTIONS)
------------------------------------------------------------------------
(11) Percent of class represented by amount in row (9) 0.00%
                                                       ----------------- -------
-------------------------------------------------------------
(12) Type of reporting person (SEE INSTRUCTIONS) PN - Partnership
                                                 ----------------------- -------
-------------------------------------------------------------

                                        5



CUSIP NO. 03074K 10 0

------------------------------------------------------------------------
(1)  Name of reporting person(s) BCIP Associates II-B
                                ------------------
     S.S. or I.R.S. identification nos. of above persons 04-3404819
                                                        ---------------- -------
-------------------------------------------------------------
(2)  Check the appropriate box if a member of a group          |
     (SEE INSTRUCTIONS)                                        | (a) [X]
                                                               | (b) [ ] -------
-------------------------------------------------------------
(3)  SEC USE ONLY

------------------------------------------------------------------------
(4)  Citizenship or place of organization Delaware
------------------------------------------------------------------------
                          (5)    Sole voting power 0
                                                  ----------------------
                         -----------------------------------------------
 Number of shares         (6)    Shared voting power 0
   beneficially                                      -------------------
  owned by each          -----------------------------------------------
    reporting             (7)    Sole dispositive power 0
   person with:                                        -----------------
                         -----------------------------------------------
                          (8)    Shared dispositive power 0
                                                          -------------- -------
-------------------------------------------------------------
(9)  Aggregate amount beneficially owned by each reporting person 0
                                                                  ------ -------
-------------------------------------------------------------
(10) Check box if the aggregate amount in row (9) excludes certain shares   [_]
     (SEE INSTRUCTIONS)
------------------------------------------------------------------------
(11) Percent of class represented by amount in row (9) 0.00%
                                                       ----------------- -------
-------------------------------------------------------------
(12) Type of reporting person (SEE INSTRUCTIONS) PN - Partnership
                                                 ----------------------- -------
-------------------------------------------------------------

                                        6



CUSIP NO. 03074K 10 0

------------------------------------------------------------------------
(1)  Name of reporting person(s) BCIP Trust Associates II
                                ------------------
     S.S. or I.R.S. identification nos. of above persons 04-3400371
                                                        ---------------- -------
-------------------------------------------------------------
(2)  Check the appropriate box if a member of a group          |
     (SEE INSTRUCTIONS)                                        | (a) [X]
                                                               | (b) [ ] -------
-------------------------------------------------------------
(3)  SEC USE ONLY

------------------------------------------------------------------------
(4)  Citizenship or place of organization Delaware
------------------------------------------------------------------------
                          (5)    Sole voting power 0
                                                  ----------------------
                         -----------------------------------------------
 Number of shares         (6)    Shared voting power 0
   beneficially                                      -------------------
  owned by each          -----------------------------------------------
    reporting             (7)    Sole dispositive power 0
   person with:                                        -----------------
                         -----------------------------------------------
                          (8)    Shared dispositive power 0
                                                          -------------- -------
-------------------------------------------------------------
(9)  Aggregate amount beneficially owned by each reporting person 0
                                                                  ------ -------
-------------------------------------------------------------
(10) Check box if the aggregate amount in row (9) excludes certain shares  [_]
     (SEE INSTRUCTIONS)
------------------------------------------------------------------------
(11) Percent of class represented by amount in row (9) 0.00%
                                                       ----------------- -------
-------------------------------------------------------------
(12) Type of reporting person (SEE INSTRUCTIONS) PN - Partnership
                                                 ----------------------- -------
-------------------------------------------------------------

                                        7



CUSIP NO. 03074K 10 0

------------------------------------------------------------------------
(1)  Name of reporting person(s) BCIP Associates II-B
                                ------------------
     S.S. or I.R.S. identification nos. of above persons 04-3400372
                                                        ---------------- -------
-------------------------------------------------------------
(2)  Check the appropriate box if a member of a group          |
     (SEE INSTRUCTIONS)                                        | (a) [X]
                                                               | (b) [ ] -------
-------------------------------------------------------------
(3)  SEC USE ONLY

------------------------------------------------------------------------
(4)  Citizenship or place of organization Delaware
------------------------------------------------------------------------
                          (5)    Sole voting power 0
                                                  ----------------------
                         -----------------------------------------------
 Number of shares         (6)    Shared voting power 0
   beneficially                                      -------------------
  owned by each          -----------------------------------------------
    reporting             (7)    Sole dispositive power 0
   person with:                                        -----------------
                         -----------------------------------------------
                          (8)    Shared dispositive power 0
                                                          -------------- -------
-------------------------------------------------------------
(9)  Aggregate amount beneficially owned by each reporting person 0
                                                                  ------ -------
-------------------------------------------------------------
(10) Check box if the aggregate amount in row (9) excludes certain shares   [_]
     (SEE INSTRUCTIONS)
------------------------------------------------------------------------
(11) Percent of class represented by amount in row (9) 0.00%
                                                       ----------------- -------
-------------------------------------------------------------
(12) Type of reporting person (SEE INSTRUCTIONS) PN - Partnership
                                                 ----------------------- -------
-------------------------------------------------------------

                                        8



ITEM 1(a). NAME OF ISSUER:

      Ameritrade Holding Corporation, the successor issuer to Ameritrade Online
      Holdings Corp. (formerly Ameritrade Holding Corporation)

ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

      4211 South 102nd Street, Omaha, Nebraska 68127

ITEM 2(a). NAME OF FILING PERSON:

      This statement is being filed on behalf of Bain Capital Fund VII, LLC
("Fund VII"), Delaware limited liability company, Bain Capital VII Coinvestment
Fund, LLC ("Coinvestment Fund VII"), a Delaware limited liability company, BCI
Datek Investors, LLC ("BCI Datek"), a Delaware limited liability company, BCIP
Associates II ("BCIP II"), a Delaware general partnership, BCIP Associates II-B
("BCIP II-B"), a Delaware general partnership, BCIP Trust Associates II ("BCIP
Trust II"), a Delaware general partnership, and BCIP Trust Associates II-B
("BCIP Trust II-B"), a Delaware general partnership.

      Bain Capital Investors, LLC ("BCI"), is the sole general partner of Bain
Capital Partners VII, L.P. ("BCP"), which is the sole general partner of Bain
Capital Fund VII, L.P. ("Fund VII, L.P."), which is the managing and sole member
of Fund VII. BCP is also the sole general partner of Bain Capital VII
Coinvestment Fund, L.P. ("Coinvestment Fund VII, L.P."), which is the managing
and sole member of Coinvestment Fund VII. BCP is also the administrative member
of BCI Datek. BCI is the managing general partner of each of BCIP II, BCIP II-B,
BCIP Trust II, and BCIP Trust II-B. Fund VII, Coinvestment Fund VII, BCI Datek,
BCIP II, BCIP II-A, BCIP Trust II and BCIP Trust II-B have entered into a Joint
Filing Agreement, dated February 11, 2005, a copy of which is filed with this
Schedule G as Exhibit A, pursuant to which Fund VII, Coinvestment Fund VII, BCI
Datek, BCIP II, BCIP II-A, BCIP Trust II and BCIP Trust II-B have agreed to file
this statement jointly in accordance with the provisions of Rule 13d-1(k)(1)
under the Securities Exchange Act of 1934.

ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE:

      The principal address of each of Fund VII, Coinvestment Fund VII, BCI
Datek, BCIP II, BCIP II-A, BCIP Trust II and BCIP Trust II-B is 111 Huntington
Avenue, Boston, MA 02199.

ITEM 2(c). CITIZENSHIP:

      Each of Fund VII, Coinvestment Fund VII, BCI Datek, BCIP II, BCIP II-A,
BCIP Trust II and BCIP Trust II-B is organized under the laws of the State of
Delaware. Each of the executive officers of Fund VII, Coinvestment Fund VII, BCI
Datek, BCIP II, BCIP II-A, BCIP Trust II and BCIP Trust II-B is a citizen of the
United States.

ITEM 2(d). TITLE OF CLASS OF SECURITIES

      Common Stock, par value $.01 per share

ITEM 2(e). CUSIP NUMBER:

          03074K 10 0

                                        9



ITEM 3.

Not Applicable.

ITEM 4. OWNERSHIP

(a)   Amount Beneficially Owned:

      Each of Fund VII, Coinvestment Fund VII, BCI Datek, BCIP II, BCIP II-B,
      BCIP Trust II and BCIP Trust II-B own 0 shares of the Common Stock of the
      Company.

(b)   Percent of Class:

      Each of Fund VII, Coinvestment Fund VII, BCI Datek, BCIP II, BCIP II-B,
      BCIP Trust II and BCIP Trust II-B own 0.00% of the Common Stock
      outstanding of the Company.

(c)   Number of shares as to which such person has:

      (i)   sole power to vote or to direct the vote

            Bain Capital Fund VII, LLC                          0
            Bain Capital VII Coinvestment Fund VII, LLC         0
            BCI Datek Investors, LLC                            0
            BCIP Associates II                                  0
            BCIP Associates II-B                                0
            BCIP Trust Associates II                            0
            BCIP Trust Associates II-B                          0
                                                  ------------
      (ii)  shared power to vote or to direct the vote 0
                                                  ------------
      (iii) sole power to dispose or to direct the disposition of

            Bain Capital Fund VII, LLC                          0
            Bain Capital VII Coinvestment Fund VII, LLC         0
            BCI Datek Investors, LLC                            0
            BCIP Associates II                                  0
            BCIP Associates II-B                                0
            BCIP Trust Associates II                            0
            BCIP Trust Associates II-B                          0
                                                        ----------------
      (iv)  shared power to dispose or to direct the disposition of 0
                                                        ----------------
Instruction. For computations regarding securities which represent a right to
acquire an underlying security see Rule 13d-3(d)(1).

ITEM 5.

Not Applicable.



ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

Not Applicable.

ITEM 7.

Not Applicable.

ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

      Each of Fund VII, Coinvestment Fund VII, BCI Datek, BCIP II, BCIP II-A,
BCIP Trust II and BCIP Trust II-B (the "Bain Funds") is party to a Stockholders
Agreement, dated as of April 6, 2002, between the Issuer, entities affiliates
with TA Associates, Inc., entities affiliated with Silver Lake Partners, LP, J.
Joe Ricketts, Mr. Ricketts' spouse and a trust established for the benefit of
Mr. Ricketts' grandchildren. An exhibit listing each party to the Stockholders
Agreement is attached hereto. The Stockholders Agreement requires the parties to
vote their Common Stock for directors that are designated in accordance with the
provisions of the Stockholders Agreement. The Stockholders Agreement restricts
the parties from selling Common Stock in some negotiated transactions unless the
seller offers each other party an opportunity to participate in the sale. In
addition, the Stockholders Agreement restricts the parties from voting their
shares of Common Stock in favor of or against certain sale of the company
transactions that are not approved by the requisite directors. The aggregate
number of shares of Common Stock owned by the parties to the Stockholders
Agreement, based on information contained in the Company's most recent
definitive proxy statement, is 137,007,194 shares. The share ownership reported
for the Bain Funds does not include any shares owned by the other parties to the
Stockholders Agreement, except to the extent already disclosed in this Schedule
13G. Each of the Bain Funds disclaims beneficial ownership of any shares of
Common Stock owned by the other parties to the Stockholders Agreement, except to
the extent already disclosed in this Schedule 13G.

ITEM 9.

Not Applicable.



                                   SIGNATURES

      After reasonable inquiry and to the best of my knowledge and belief, the
undersigned certifies that the information set forth in this Statement is true,
complete and correct.

Dated: February 11, 2005 BAIN CAPITAL FUND VII, LLC
                         By: Bain Capital Fund VII, L.P., its managing member
                         By: Bain Capital Partners VII, L.P., its general
                               partner
                         By: Bain Capital Investors, LLC, its general partner

                         BAIN CAPITAL VII COINVESTMENT FUND, LLC
                         By: Bain Capital VII Coinvestment Fund, L.P., its
                               managing member
                         By: Bain Capital Partners VII, L.P., its general
                               partner
                         By: Bain Capital Investors, LLC, its general partner

                         BCI DATEK INVESTORS, LLC
                         By: Bain Capital Partners, VII, L.P., its general
                               partner
                         By: Bain Capital Investors, LLC, its general partner

                         BCIP ASSOCIATES II
                         BCIP ASSOCIATES II-B
                         BCIP TRUST ASSOCIATES II
                         BCIP TRUST ASSOCIATES II-B
                         By: Bain Capital Investors, LLC, their managing partner

                         By: /s/ Michael F. Goss
                            -----------------------------
                            Name: Michael F. Goss
                            Title: Managing Director

      The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative (other than an executive
officer or general partner of the filing person), evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.



                                                                       Exhibit A

                     AGREEMENT REGARDING THE JOINT FILING OF
                                  SCHEDULE 13G

The undersigned hereby agree as follows:

      (i)   Each of them is individually eligible to use the Schedule 13G to
which this Exhibit is attached, and such Schedule 13G is filed on behalf of each
of them; and

      (ii)  Each of them is responsible for the timely filing of such Schedule
13G and any amendments thereto, and for the completeness and accuracy of the
information concerning such person contained therein; but none of them is
responsible for the completeness or accuracy of the information concerning the
other persons making the filing, unless such person knows or has reason to
believe that such information is inaccurate.

Dated: February 11, 2005 BAIN CAPITAL FUND VII, LLC
                         By: Bain Capital Fund VII, L.P., its managing member
                         By: Bain Capital Partners VII, L.P., its general
                               partner
                         By: Bain Capital Investors, LLC, its general partner

                         BAIN CAPITAL VII COINVESTMENT FUND, LLC
                         By: Bain Capital VII Coinvestment Fund, L.P., its
                             managing member
                         By: Bain Capital Partners VII, L.P., its general
                               partner
                         By: Bain Capital Investors, LLC, its general partner

                         BCI DATEK INVESTORS, LLC
                         By: Bain Capital Partners, VII, L.P., its general
                               partner
                         By: Bain Capital Investors, LLC, its general partner

                         BCIP ASSOCIATES II
                         BCIP ASSOCIATES II-B
                         BCIP TRUST ASSOCIATES II
                         BCIP TRUST ASSOCIATES II-B
                         By: Bain Capital Investors, LLC, their managing partner

                         By: /s/ Michael F. Goss
                            -------------------------------
                            Name: Michael F. Goss
                            Title: Managing Director



                                                                       Exhibit B

                      Parties to the Stockholders Agreement

1.  Ameritrade Holding Corporation
2.  Bain Capital Fund VII, L.P.
3.  Bain Capital VII Coinvestment Fund, L.P.
4.  BCI Datek Investors, LLC
5.  BCIP Associates II
6.  BCIP Associates II-B
7.  BCIP Trust Associates II
8.  BCIP Trust Associates II-B
9.  Silver Lake Partners, L.P.
10. Silver Lake Investors, L.P.
11. Silver Lake Technology Investors, L.L.C.
12. TA/Advent VIII, L.P.
13. TA Executives Fund, LLC
14. TA Investors, LLC
15. TA Atlantic & Pacific IV, L.P.
16. TA IX, L.P.
17. Advent Atlantic & Pacific III, L.P.
18. J. Joe Ricketts
19. Marlene M. Ricketts
20. Marlene M. Ricketts 1994 Dynasty Trust
21. J. Joe Ricketts 1994 Dynasty Trust
22. Ricketts Grandchildren Trust