SCHEDULE 13-G

OMB APPROVAL

OMB Number:

   3235-0145

Expires:

   12-31-05

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

 

 

 

SCHEDULE 13G

 

 

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(AMENDMENT NO.         ) *

 

 

 

 

 

Ameritrade Holding Company, Inc.

(Name of Issuer)

 

 

Common Stock Par Value $.01

(Title of Class of Securities)

 

 

87236Y 10 8

                                (CUSIP Number)                                

 

 

12/31/05

(Date of Event Which Requires Filing of this Statement)

 

 

THIS SCHEDULE IS BEING FILED PURSUANT TO RULE I3d-1 (d)

 

 

*   The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

 

The information required in 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 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 

Page 1


CUSIP NO. 87236Y 10 8

   13G

 

  1   

NAME OF REPORTING PERSON                                              S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

 

TA IX L.P.

TA/Advent VIII L.P.

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

 

 

 

 

04-3520503

04-3334380

04-3299318

04-3465628

04-3398534

04-3395404

  2   

CHECK THE BOX IF A MEMBER OF A GROUP*

(A)  x

(B)  ¨

   
  3   

SEC USE ONLY

 

   
  4   

CITIZENSHIP OR PLACE OF ORGANIZATION

 

TA IX L.P.

TA/Advent VIII L.P.

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

 

 

Delaware

Delaware

Delaware

Delaware

Delaware

Delaware

 

 

 

 

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
WITH

 

  5    SOLE VOTING POWER

 

         TA IX L.P.

         TA/Advent VIII L.P.

         Advent Atlantic and Pacific III L.P.

         TA/Atlantic and Pacific IV L.P.

         TA Executives Fund LLC

         TA Investors LLC

 

 

0

0

0

0

0

52,955

 

  6    SHARED VOTING POWER

        N/A

   
 

  7    SOLE DISPOSITIVE POWER

 

         TA IX L.P.

         TA/Advent VIII L.P.

         Advent Atlantic and Pacific III L.P.

         TA/Atlantic and Pacific IV L.P.

         TA Executives Fund LLC

         TA Investors LLC

 

 

 

0

0

0

0

0

52,955

   

  8    SHARED DISPOSITIVE POWER

        N/A

   
  9  

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

TA IX L.P.

TA/Advent VIII L.P.

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

 

 

 

0

0

0

0

0

52,955

10  

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

 

   
11  

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

 

TA IX L.P.

TA/Advent VIII L.P.

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

 

 

 

0

0

0

0

0

.01%

12  

TYPE OF REPORTING PERSON

 

Each entity is a Partnership

   

 

Page 2


ITEM 1 (A)

   NAME OF ISSUER: Ameritrade Holding Company, Inc.       

ITEM 1 (B)

   ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES:       
    

4211 South 102nd Street

Omaha, NE 68127

      

ITEM 2 (A)

  

NAME OF PERSON FILING:

TA IX L.P.

TA/Advent VIII L.P.

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

      

ITEM 2 (B)

  

ADDRESS OF PRINCIPAL BUSINESS OFFICE:

 

c/o TA Associates

125 High Street, Suite 2500

Boston, MA 02110

      

ITEM 2 (C)

   CITIZENSHIP: Not Applicable       

ITEM 2  (D)

   TITLE AND CLASS OF SECURITIES: Common       

ITEM 2  (E)

   CUSIP NUMBER: 87236Y 10 8       

ITEM 3

  

IF THIS STATEMENT IS FILED PURSUANT TO RULES 13D-1 (B) OR 13D-2 (B), CHECK WHETHER THE PERSON FILING IS A:

Not Applicable

      

ITEM 4

   OWNERSHIP       
ITEM 4 (A)    AMOUNT BENEFICIALLY OWNED:    COMMON STOCK

 
    

TA IX L.P.

TA/Advent VIII L.P

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

   0
0
0
0
0
52,955
 
 
 
 
 
 
ITEM 4 (B)    PERCENT OF CLASS    PERCENTAGE

 
    

TA IX L.P.

TA/Advent VIII L.P

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

   0
0
0
0
0
.01
 
 
 
 
 
%

ITEM 4 (C)

   NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:  
     (I)            SOLE POWER TO VOTE OR DIRECT THE VOTE:    COMMON STOCK

 
    

TA IX L.P.

TA/Advent VIII L.P

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

   0
0
0
0
0
52,955
 
 
 
 
 
 
    

(II)            SHARED POWER TO VOTE OR DIRECT THE VOTE:

   N/A  
     (III)            SOLE POWER TO DIPOSE OR DIRECT THE DISPOSITION:    COMMON STOCK

 
    

TA IX L.P.

TA/Advent VIII L.P

Advent Atlantic and Pacific III L.P.

TA/Atlantic and Pacific IV L.P.

TA Executives Fund LLC

TA Investors LLC

   0
0
0
0
0
52,955
 
 
 
 
 
 
    

(IV)            SHARED POWER TO DISPOSE OR DIRECT THE DISPOSITION

   N/A  

 

Page 3


ITEM 5

   OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS: Not Applicable

ITEM 6

   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON: Not Applicable

ITEM 7

  

IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY THAT ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:

 

Not Applicable

ITEM 8

  

IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

 

This schedule 13G is filed pursuant to Rule 13d-l (d). For the agreement of the TA group members to a joint filing, see below.

ITEM 9

   NOTICE OF DISSOLUTION OF GROUP: Not Applicable

ITEM 10

   CERTIFICATION: Not Applicable

 

Page 4


SIGNATURE

 

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

 

AGREEMENT FOR JOINT FILING

 

TA IX L.P., TA/Advent VIII L.P., Advent Atlantic and Pacific III L.P., TA/Atlantic and Pacific IV L.P., TA Executives Fund LLC and TA Investors LLC, hereby agree that TA Associates Inc. shall file with the Securities and Exchange Commission a joint schedule 13G on behalf of the above-named parties concerning their beneficial ownership of Ameritrade Holding Company, Inc.

 

Dated:  February 14, 2006

 

TA IX L.P.

By:

 

TA Associates IX LLC., its General Partner

By:

 

TA Associates, Inc. its Manager

By:

  /s/    THOMAS P. ALBER        
    Thomas P. Alber, Chief Financial Officer

 

TA/ADVENT VIII L.P.

By:

 

TA Associates VIII LLC. its General Partner

By:

 

TA Associates, Inc. its Manager

By:

  /s/    THOMAS P. ALBER        
    Thomas P. Alber, Chief Financial Officer

 

ADVENT ATLANTIC AND PACIFIC III L.P.

By:

  TA Associates AAP III Partners L.P., its General Partner

By:

 

TA Associates, Inc. its General Partner

By:

  /s/    THOMAS P. ALBER        
    Thomas P. Alber, Chief Financial Officer

 

TA/ATLANTIC AND PACIFIC IV L.P.

By:

 

TA Associates AP IV L.P., its General Partner

By:

 

TA Associates, Inc. its General Partner

By:

  /s/    THOMAS P. ALBER        
    Thomas P. Alber, Chief Financial Officer

 

TA EXECUTIVES FUND LLC

By:

 

TA Associates, Inc., its Manager

By:

  /s/    THOMAS P. ALBER        
    Thomas P. Alber, Chief Financial Officer

 

TA INVESTORS LLC

By:

 

TA Associates, Inc., its Manager

By:

  /s/    THOMAS P. ALBER        
    Thomas P. Alber, Chief Financial Officer

 

Page 5