X0306 4 2014-02-18 false 0001336917 Under Armour, Inc. UA 0001428648 Dickerson Brad 1020 HULL STREET BALTIMORE MD 21230 false true false false Chief Financial Officer Class A Common Stock 2014-02-18 4 S false 200 104.2 D 19800 D Class A Common Stock 2014-02-18 4 S false 900 105 D 18900 D Class A Common Stock 2014-02-18 4 S false 600 106.56 D 18300 D Class A Common Stock 2014-02-18 4 S false 7350 107.46 D 10950 D Class A Common Stock 2014-02-18 4 S false 950 108.07 D 10000 D Shares sold pursuant to a 10b5-1 trading plan. This transaction was executed in multiple trades at prices ranging from $103.72 to $104.67. 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 $104.75 to $105.44. 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 $105.97 to $106.81. 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 $106.97 to $107.94. 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 $108.00 to $108.29. 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. /s/ John P. Stanton, Attorney in Fact for: Brad Dickerson 2014-02-19