Under Armour, Inc. — Director's Dealing 2011

Feb 3, 2011

SEC Form 5 — Annual Statement of Changes in Beneficial Ownership

Issuer: Under Armour, Inc. (UA)
CIK: 0001336917
Period of Report: 2010-12-31

Reporting Person: Plank Kevin A (Director, President and CEO, 10% Owner)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-11-30	Class B Common Stock	$	G	125000	Disposed		Class A Common Stock (125000)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock (926982)	926982	Indirect
Class B Common Stock	$		Class A Common Stock (390000)	390000	Indirect
Class B Common Stock	$		Class A Common Stock (308975)	308975	Indirect

Footnotes

F1: Class B Common Stock is convertible at any time at the option of the reporting person into shares of Class A Common Stock on a one-for-one basis, and has no expiration date.

F2: Shares gifted in connection with a 10b5-1 trading plan.

F3: Excludes 926,982 shares previously owned directly which were contributed to a grantor retained annuity trust in 2009.