TERADATA CORP /DE/ — Director's Dealing 2012

May 8, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TERADATA CORP /DE/ (TDC)
CIK: 0000816761
Period of Report: 2012-05-04

Reporting Person: KOEHLER MICHAEL (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-04	Common Stock	M	80000	$27.98	Acquired	394451.838	Direct
2012-05-04	Common Stock	S	67221	$73.719	Disposed	327230.838	Direct
2012-05-04	Common Stock	S	12779	$73.514	Disposed	314451.838	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-04	Employee Stock Options	$27.98	M	80000	Disposed	2017-09-30	Common Stock (80000)	Direct

Footnotes

F1: The total beneficial holdings on this report include 85.348 shares acquired under the Teradata Employee Stock Purchase Plan on February 29, 2012 and 226.005 shares acquired under the plan on March 30, 2012.

F2: The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.50 to $74.20. 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 ranges set forth in footnotes (1) and (2) to this Form 4.

F3: The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $73.50 to $73.58.

F4: This option vests in four equal annual installments beginning on October 1, 2008.