X0306 4 2012-08-03 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 2012-08-03 4 S false 15846 55.8 D 2501002 D Class A Common Stock 2012-08-03 4 S false 3170 55.8 D 945122 I JSDM Family LLC Class A Common Stock 2012-08-03 4 S false 8154 56.21 D 2492848 D Class A Common Stock 2012-08-03 4 S false 1630 56.21 D 943492 I JSDM Family LLC Class A Common Stock 2012-08-03 4 S false 4594 55.84 D 40140 I Annuity Trust Class A Common Stock 2012-08-03 4 S false 1900 56.22 D 38240 I Annuity Trust Class A Common Stock 2012-08-06 4 S false 8615 56.62 D 2484233 D Class A Common Stock 2012-08-06 4 S false 1723 56.62 D 941769 I JSDM Family LLC Class A Common Stock 2012-08-06 4 S false 15385 57.26 D 2468848 D Class A Common Stock 2012-08-06 4 S false 3077 57.26 D 938692 I JSDM Family LLC Class A Common Stock 2012-08-06 4 S false 3300 56.78 D 34940 I Annuity Trust Class A Common Stock 2012-08-06 4 S false 3194 57.35 D 31746 I Annuity Trust Class A Common Stock 2012-08-07 4 S false 2828 57.16 D 2466020 D Class A Common Stock 2012-08-07 4 S false 2172 58.02 D 2463848 D Class A Common Stock 2012-08-07 4 S false 434 58.02 D 938258 I JSDM Family LLC Class A Common Stock 2012-08-07 4 S false 566 57.16 D 937692 I JSDM Family LLC Class A Common Stock 2012-08-07 4 S false 3894 57.19 D 27852 I Annuity Trust Class A Common Stock 2012-08-07 4 S false 2600 58.06 D 25252 I Annuity Trust Shares sold pursuant to a 10b5-1 trading plan. This transaction was executed in multiple trades at prices ranging from $55.12 to $56.11. 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 $56.12 to $56.34. 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 $56.13 to $56.33. 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 $55.95 to $56.94. 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 $56.95 to $57.66. 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. This transaction was executed in multiple trades at prices ranging from $56.14 to $57.12. 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 $57.14 to $57.65. 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 $56.64 to $57.64. 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 $57.65 to $58.42. 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 $56.67 to $57.65. 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 $57.68 to $58.42. 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 2012-08-07