FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public
Utility Holding Company Act of 1935 or Section 30(f) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Harrington Daniel L 		2. Issuer Name and Ticker or Trading Symbol

TERADATA CORP /DE/ [ TDC ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
EVP, Technology & Support Svcs
(Last)          (First)          (Middle)

17095 VIA DEL CAMPO 		3. Date of Earliest Transaction (MM/DD/YYYY)

3/13/2012
(Street)

SAN DIEGO, CA 92127
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   3/13/2012     M    11498   A $21.01   67768   D    
Common Stock   3/13/2012     M    12292   A $20.84   80060   D    
Common Stock   3/13/2012     M    18552   A $22.31   98612   D    
Common Stock   3/13/2012     M    9806   A $24.87   108418   D    
Common Stock   3/13/2012     M    25376   A $27.98   133794   D    
Common Stock   3/13/2012     M    20981   A $30.68   154775   D    
Common Stock   3/13/2012     M    9954   A $41.09   164729   D    
Common Stock   3/13/2012     S    119763   D $67.0003   (1) 44966   D    
Common Stock   3/14/2012     M    5000   A $13.77   49966   D    
Common Stock   3/14/2012     S    5000   D $67.12   (2) 44966   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Options   $21.01   3/13/2012     M         11498      (3) 3/1/2015   Common Stock   11498   $ 0   0   D    
Employee Stock Options   $20.84   3/13/2012     M         12292      (3) 2/13/2016   Common Stock   12292   $ 0   0   D    
Employee Stock Options   $22.31   3/13/2012     M         18552      (3) 10/31/2016   Common Stock   18552   $ 0   0   D    
Employee Stock Options   $24.87   3/13/2012     M         9806      (3) 2/28/2017   Common Stock   9806   $ 0   0   D    
Employee Stock Options   $27.98   3/13/2012     M         25376      (3) 9/30/2017   Common Stock   25376   $ 0   0   D    
Employee Stock Options   $30.68   3/13/2012     M         20981      (4) 11/30/2019   Common Stock   20981   $ 0   20982   D    
Employee Stock Options   $41.09   3/13/2012     M         9954      (5) 11/29/2020   Common Stock   9954   $ 0   29865   D    
Employee Stock Options   $13.77   3/14/2012     M         5000      (6) 12/1/2018   Common Stock   5000   $ 0   80922   D    

Explanation of Responses:
( 1)  The price in Column 4 is a weighted average price. The prices actually received ranged from $67.00 to $67.04. The reporting person has provided to the issuer and will provide any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.
( 2)  Sale of shares pursuant to Rule 10b5-1 Plan adopted on November 28, 2011.
( 3)  This option is fully exercisable.
( 4)  This option vests in four equal annual installments beginning on December 1, 2010.
( 5)  This option vests in four equal annual installments beginning on November 30, 2011.
( 6)  This option vests in four equal annual installments beginning on December 2, 2009.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Harrington Daniel L
17095 VIA DEL CAMPO
SAN DIEGO, CA 92127

EVP, Technology & Support Svcs

Signatures
Margaret A. Treese, Attorney-in-fact for Daniel Harrington 3/15/2012
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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