Under Armour, Inc. — Director's Dealing 2011

Feb 3, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Under Armour, Inc. (UA)
CIK: 0001336917
Period of Report: 2011-02-01

Reporting Person: Plank J Scott (EVP of Business Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-01	Class A Common Stock	S	11460	$59.88	Disposed	1693508	Direct
2011-02-02	Class A Common Stock	S	3173	$59.47	Disposed	1690335	Direct
2011-02-02	Class A Common Stock	S	8287	$59.79	Disposed	1682048	Direct
2011-02-03	Class A Common Stock	S	514	$59.55	Disposed	1681534	Direct
2011-02-03	Class A Common Stock	S	10946	$60.35	Disposed	1670588	Direct
2011-02-01	Class A Common Stock	S	4165	$59.88	Disposed	181363	Indirect
2011-02-02	Class A Common Stock	S	1152	$59.47	Disposed	180211	Indirect
2011-02-02	Class A Common Stock	S	3013	$59.79	Disposed	177198	Indirect
2011-02-03	Class A Common Stock	S	186	$59.55	Disposed	177012	Indirect
2011-02-03	Class A Common Stock	S	3979	$60.35	Disposed	173033	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	506346	Indirect
Class A Common Stock	100000	Indirect

Footnotes

F1: Shares sold pursuant to a 10b5-1 trading plan.

F2: This transaction was executed in multiple trades at prices ranging from $59.54 to $60.40. 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.

F3: This transaction was executed in multiple trades at prices ranging from $59.37 to $59.51. 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 $59.52 to $60.51. 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: This transaction was executed in multiple trades at prices ranging from $59.50 to $59.65. 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.

F6: This transaction was executed in multiple trades at prices ranging from $59.73 to $60.71. 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.