TERADATA CORP /DE/ — Director's Dealing 2012

May 17, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TERADATA CORP /DE/ (TDC)
CIK: 0000816761
Period of Report: 2012-05-16

Reporting Person: Harrington Daniel L (EVP, Technology & Support Svcs)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-16	Common Stock	M	6941	$13.77	Acquired	51907	Direct
2012-05-16	Common Stock	S	6941	$69.72	Disposed	44966	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-16	Employee Stock Options	$13.77	M	6941	Disposed	2018-12-01	Common Stock (6941)	Direct

Footnotes

F1: Sale of shares pursuant to Rule 10b5-1 Plan adopted on November 28, 2011.

F2: This option vests in four equal annual installments beginning on December 2, 2009.