X0306 4 2012-07-31 false 0001336917 Under Armour, Inc. UA 0001344671 Plank J Scott 1020 HULL STREET BALTIMORE MD 21230 false true false false EVP, Business Development Class A Common Stock 200000 I JS DM II LLC Class A Common Stock 2012-07-31 4 S false 23000 54.43 D 2565848 D Class A Common Stock 2012-07-31 4 S false 6294 54.44 D 57922 I Annuity Trust Class A Common Stock 2012-07-31 4 S false 200 55.12 D 57722 I Annuity Trust Class A Common Stock 2012-07-31 4 S false 1000 55.05 D 2564848 D Class A Common Stock 2012-07-31 4 S false 4600 54.43 D 958092 I JSDM Family LLC Class A Common Stock 2012-07-31 4 S false 200 55.05 D 957892 I JSDM Family LLC Class A Common Stock 2012-08-01 4 S false 23923 53.87 D 2540925 D Class A Common Stock 2012-08-01 4 S false 77 54.62 D 2540848 D Class A Common Stock 2012-08-01 4 S false 6494 53.86 D 51228 I Annuity Trust Class A Common Stock 2012-08-01 4 S false 4785 53.87 D 953107 I JSDM Family LLC Class A Common Stock 2012-08-01 4 S false 15 54.62 D 953092 I JSDM Family LLC Class A Common Stock 2012-08-02 4 S false 17943 53.82 D 2522905 D Class A Common Stock 2012-08-02 4 S false 3589 53.82 D 949503 I JSDM Family LLC Class A Common Stock 2012-08-02 4 S false 6057 54.4 D 2516848 D Class A Common Stock 2012-08-02 4 S false 1211 54.4 D 948292 I JSDM Family LLC Class A Common Stock 2012-08-02 4 S false 5694 53.89 D 45534 I Annuity Trust Class A Common Stock 2012-08-02 4 S false 800 54.52 D 44734 I Annuity Trust Shares sold pursuant to a 10b5-1 trading plan. This transaction was executed in multiple trades at prices ranging from $53.94 to $54.93. 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. This transaction was executed in multiple trades at prices ranging from $53.99 to $54.94. 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. This transaction was executed in multiple trades at prices ranging from $55.11 to $55.12. 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. This transaction was executed in multiple trades at prices ranging from $54.94 to $55.18. 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. This transaction was executed in multiple trades at prices ranging from $53.50 to $54.48. 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. This transaction was executed in multiple trades at prices ranging from $53.21 to $54.20. 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. This transaction was executed in multiple trades at prices ranging from $54.21 to $54.65. 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. This transaction was executed in multiple trades at prices ranging from $53.46 to $54.39. 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. This transaction was executed in multiple trades at prices ranging from $54.46 to $54.60. 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. All share amounts, and numbers and exercise prices for stock options, have been adjusted to reflect the two-for-one stock split effective July 9, 2012. /s/ John P. Stanton, Attorney in Fact for: J. Scott Plank 2012-08-02