Under Armour, Inc. — Director's Dealing 2012

May 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Under Armour, Inc. (UA)
CIK: 0001336917
Period of Report: 2012-05-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-01	Class A Common Stock	C	2560	—	Acquired	2660	Direct
2012-05-01	Class A Common Stock	C	12480	—	Acquired	15140	Direct
2012-05-01	Class A Common Stock	C	24960	—	Acquired	40100	Direct
2012-05-01	Class A Common Stock	S	2560	$97.15	Disposed	37540	Direct
2012-05-01	Class A Common Stock	S	12480	$98.17	Disposed	25060	Direct
2012-05-01	Class A Common Stock	S	24960	$98.84	Disposed	100	Direct
2012-05-02	Class A Common Stock	C	6080	—	Acquired	6180	Direct
2012-05-02	Class A Common Stock	S	6080	$98.43	Disposed	100	Direct
2012-05-02	Class A Common Stock	C	4640	—	Acquired	4740	Direct
2012-05-02	Class A Common Stock	S	4640	$99.05	Disposed	100	Direct
2012-05-02	Class A Common Stock	C	22013	—	Acquired	22113	Direct
2012-05-02	Class A Common Stock	S	22013	$100.56	Disposed	100	Direct
2012-05-02	Class A Common Stock	C	7267	—	Acquired	7367	Direct
2012-05-02	Class A Common Stock	S	7267	$101.28	Disposed	100	Direct
2012-05-03	Class A Common Stock	C	16421	—	Acquired	16521	Direct
2012-05-03	Class A Common Stock	C	19473	—	Acquired	35994	Direct
2012-05-03	Class A Common Stock	C	4106	—	Acquired	40100	Direct
2012-05-03	Class A Common Stock	S	16421	$99.52	Disposed	23679	Direct
2012-05-03	Class A Common Stock	S	19473	$100.51	Disposed	4206	Direct
2012-05-03	Class A Common Stock	S	4106	$101.27	Disposed	100	Direct
2012-05-01	Class A Common Stock	C	160	—	Acquired	160	Indirect
2012-05-01	Class A Common Stock	C	780	—	Acquired	940	Indirect
2012-05-01	Class A Common Stock	C	1560	—	Acquired	2500	Indirect
2012-05-01	Class A Common Stock	S	160	$97.15	Disposed	2340	Indirect
2012-05-01	Class A Common Stock	S	780	$98.17	Disposed	1560	Indirect
2012-05-01	Class A Common Stock	S	1560	$98.84	Disposed	0	Indirect
2012-05-02	Class A Common Stock	C	380	—	Acquired	380	Indirect
2012-05-02	Class A Common Stock	S	380	$98.43	Disposed	0	Indirect
2012-05-02	Class A Common Stock	C	290	—	Acquired	290	Indirect
2012-05-02	Class A Common Stock	S	290	$99.05	Disposed	0	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 $96.51 to $97.50. 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 $97.51 to $98.50. 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 $98.51 to $99.36. 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 $97.84 to $98.83. 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 $98.84 to $99.43. 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 $99.98 to $100.96. 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 $100.98 to $101.71. 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.

F10: This transaction was executed in multiple trades at prices ranging from $99.07 to $100.06. 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 $100.07 to $101.06. 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 $101.07 to $101.77. 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.