Under Armour, Inc. — Director's Dealing 2011

Aug 5, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Under Armour, Inc. (UA)
CIK: 0001336917
Period of Report: 2011-08-03

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-08-05	Class A Common Stock	C	3222	—	Acquired	3322	Direct
2011-08-05	Class A Common Stock	S	3222	$65.04	Disposed	100	Direct
2011-08-05	Class A Common Stock	C	738	—	Acquired	838	Direct
2011-08-05	Class A Common Stock	S	738	$66.19	Disposed	100	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-08-03	Class B Common Stock	$	C	4140	Disposed		Class A Common Stock (4140)	Direct
2011-08-03	Class B Common Stock	$	C	23220	Disposed		Class A Common Stock (23220)	Direct
2011-08-03	Class B Common Stock	$	C	14580	Disposed		Class A Common Stock (14580)	Direct
2011-08-03	Class B Common Stock	$	C	5670	Disposed		Class A Common Stock (5670)	Direct
2011-08-03	Class B Common Stock	$	C	90	Disposed		Class A Common Stock (90)	Direct
2011-08-04	Class B Common Stock	$	C	7650	Disposed		Class A Common Stock (7650)	Direct
2011-08-04	Class B Common Stock	$	C	14400	Disposed		Class A Common Stock (14400)	Direct
2011-08-04	Class B Common Stock	$	C	16200	Disposed		Class A Common Stock (16200)	Direct
2011-08-04	Class B Common Stock	$	C	6660	Disposed		Class A Common Stock (6660)	Direct
2011-08-04	Class B Common Stock	$	C	2700	Disposed		Class A Common Stock (2700)	Direct
2011-08-04	Class B Common Stock	$	C	90	Disposed		Class A Common Stock (90)	Direct
2011-08-05	Class B Common Stock	$	C	3510	Disposed		Class A Common Stock (3510)	Direct
2011-08-05	Class B Common Stock	$	C	6570	Disposed		Class A Common Stock (6570)	Direct
2011-08-05	Class B Common Stock	$	C	20070	Disposed		Class A Common Stock (20070)	Direct
2011-08-05	Class B Common Stock	$	C	8640	Disposed		Class A Common Stock (8640)	Direct
2011-08-05	Class B Common Stock	$	C	3222	Disposed		Class A Common Stock (3222)	Direct
2011-08-05	Class B Common Stock	$	C	738	Disposed		Class A Common Stock (738)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class B Common Stock	$		Class A Common Stock (888976)	888976	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: Shares sold pursuant to a 10b5-1 trading plan.

F2: Shares of Class B Common Stock automatically convert to Shares of Class A Common Stock effective immediately upon the sale of the Class B shares by the reporting person.

F3: This transaction was executed in multiple trades at prices ranging from $64.70 to $65.68. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F4: This transaction was executed in multiple trades at prices ranging from $65.75 to $66.52. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

F5: 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.