Under Armour, Inc. — Director's Dealing 2011

Nov 1, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Under Armour, Inc. (UA)
CIK: 0001336917
Period of Report: 2011-10-28

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-10-28	Class A Common Stock	S	4620	$84.31	Disposed	1501700	Direct
2011-10-28	Class A Common Stock	S	6455	$85.37	Disposed	1495245	Direct
2011-10-28	Class A Common Stock	S	385	$85.86	Disposed	1494860	Direct
2011-10-31	Class A Common Stock	S	2585	$84.8	Disposed	1492275	Direct
2011-10-31	Class A Common Stock	S	3960	$85.8	Disposed	1488315	Direct
2011-10-31	Class A Common Stock	S	4842	$86.53	Disposed	1483473	Direct
2011-10-31	Class A Common Stock	S	73	$87.24	Disposed	1483400	Direct
2011-11-01	Class A Common Stock	S	3813	$81.26	Disposed	1479587	Direct
2011-11-01	Class A Common Stock	S	5322	$82.24	Disposed	1474265	Direct
2011-11-01	Class A Common Stock	S	2325	$82.98	Disposed	1471940	Direct
2011-10-28	Class A Common Stock	S	1680	$84.31	Disposed	101246	Indirect
2011-10-28	Class A Common Stock	S	2345	$85.37	Disposed	98901	Indirect
2011-10-28	Class A Common Stock	S	140	$85.86	Disposed	98761	Indirect
2011-10-31	Class A Common Stock	S	940	$84.8	Disposed	97821	Indirect
2011-10-31	Class A Common Stock	S	1440	$85.8	Disposed	96381	Indirect
2011-10-31	Class A Common Stock	S	1758	$86.53	Disposed	94623	Indirect
2011-10-31	Class A Common Stock	S	27	$87.24	Disposed	94596	Indirect
2011-11-01	Class A Common Stock	S	1387	$81.26	Disposed	93209	Indirect
2011-11-01	Class A Common Stock	S	1933	$82.24	Disposed	91276	Indirect
2011-11-01	Class A Common Stock	S	845	$82.98	Disposed	90431	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 $83.74 to $84.72. 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 $84.80 to $85.79. 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 $85.81 to $85.91. 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 $84.21 to $85.18. 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 $85.21 to $86.20. 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.

F7: This transaction was executed in multiple trades at prices ranging from $86.21 to $87.16. 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.

F8: This transaction was executed in multiple trades at prices ranging from $80.70 to $81.69. 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.

F9: This transaction was executed in multiple trades at prices ranging from $81.70 to $82.68. 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.

F10: This transaction was executed in multiple trades at prices ranging from $82.70 to $83.54. 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.