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
2011-08-03	Class A Common Stock	C	4140	—	Acquired	4240	Direct
2011-08-03	Class A Common Stock	S	4140	$66.59	Disposed	100	Direct
2011-08-03	Class A Common Stock	C	23220	—	Acquired	23320	Direct
2011-08-03	Class A Common Stock	S	23220	$67.59	Disposed	100	Direct
2011-08-03	Class A Common Stock	C	14580	—	Acquired	14680	Direct
2011-08-03	Class A Common Stock	S	14580	$68.67	Disposed	100	Direct
2011-08-03	Class A Common Stock	C	5670	—	Acquired	5770	Direct
2011-08-03	Class A Common Stock	S	5670	$69.82	Disposed	100	Direct
2011-08-03	Class A Common Stock	C	90	—	Acquired	190	Direct
2011-08-03	Class A Common Stock	S	90	$70.23	Disposed	100	Direct
2011-08-04	Class A Common Stock	C	7650	—	Acquired	7750	Direct
2011-08-04	Class A Common Stock	S	7650	$64.74	Disposed	100	Direct
2011-08-04	Class A Common Stock	C	14400	—	Acquired	14500	Direct
2011-08-04	Class A Common Stock	S	14400	$65.56	Disposed	100	Direct
2011-08-04	Class A Common Stock	C	16200	—	Acquired	16300	Direct
2011-08-04	Class A Common Stock	S	16200	$66.67	Disposed	100	Direct
2011-08-04	Class A Common Stock	C	6660	—	Acquired	6760	Direct
2011-08-04	Class A Common Stock	S	6660	$67.61	Disposed	100	Direct
2011-08-04	Class A Common Stock	C	2700	—	Acquired	2800	Direct
2011-08-04	Class A Common Stock	S	2700	$68.67	Disposed	100	Direct
2011-08-04	Class A Common Stock	C	90	—	Acquired	190	Direct
2011-08-04	Class A Common Stock	S	90	$69.23	Disposed	100	Direct
2011-08-05	Class A Common Stock	C	3510	—	Acquired	3610	Direct
2011-08-05	Class A Common Stock	S	3510	$61.17	Disposed	100	Direct
2011-08-05	Class A Common Stock	C	6570	—	Acquired	6670	Direct
2011-08-05	Class A Common Stock	S	6570	$62.28	Disposed	100	Direct
2011-08-05	Class A Common Stock	C	20070	—	Acquired	20170	Direct
2011-08-05	Class A Common Stock	S	20070	$63.26	Disposed	100	Direct
2011-08-05	Class A Common Stock	C	8640	—	Acquired	8740	Direct
2011-08-05	Class A Common Stock	S	8640	$63.98	Disposed	100	Direct

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 $66.15 to $67.12. 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 $67.15 to $68.13. 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 $68.19 to $69.18. 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 $69.22 to $70.21. 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 $64.17 to $65.16. 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 $65.17 to $66.16. 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.

F9: This transaction was executed in multiple trades at prices ranging from $66.18 to $67.17. 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 $67.20 to $68.19. 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.

F11: This transaction was executed in multiple trades at prices ranging from $68.20 to $69.12. 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.

F12: This transaction was executed in multiple trades at prices ranging from $60.65 to $61.61. 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.

F13: This transaction was executed in multiple trades at prices ranging from $61.66 to $62.65. 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.

F14: This transaction was executed in multiple trades at prices ranging from $62.67 to $63.66. 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.

F15: This transaction was executed in multiple trades at prices ranging from $63.67 to $64.65. 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.