X0306 4 2016-04-29 false 0001336917 Under Armour, Inc. UAC 0001344637 Plank Kevin A 1020 HULL STREET BALITIMORE MD 21230 true true true false Chairman and CEO Class C Common Stock 2016-04-29 4 S false 197680 40.837 D 28774490 D Class C Common Stock 2016-04-29 4 S false 6177 40.837 D 714723 I KD Plank LLC Class C Common Stock 2016-04-29 4 S false 6177 40.837 D 1038823 I KD Plank #2 LLC Class C Common Stock 2016-04-29 4 S false 12355 40.837 D 3086121 I By Plank Family Trust Class C Common Stock 2016-04-29 4 S false 2320 41.583 D 28772170 D Class C Common Stock 2016-04-29 4 S false 73 41.583 D 714650 I KD Plank LLC Class C Common Stock 2016-04-29 4 S false 73 41.583 D 1038750 I KD Plank #2 LLC Class C Common Stock 2016-04-29 4 S false 145 41.583 D 3085976 I By Plank Family Trust Under Armour, Inc. declared a stock dividend pursuant to which all holders of Class A Common Stock and Class B Common Stock on March 28, 2016, the record date for the dividend, received on April 7, 2016, one share of Class C Common Stock for each share of Class A Common Stock and Class B Common Stock held by them as of the record date (the "Class C Dividend"). The holdings in column 5 include shares of Class C Common Stock received by the Reporting Person pursuant to the Class C Dividend, including outstanding shares held by the Reporting Person and shares underlying performance-based restricted units previously granted to the Reporting Person which have been earned based on the Company performance but have not yet vested. Shares sold pursuant to a 10b5-1 trading plan. This transaction was executed in multiple trades at prices ranging from $40.48 to $41.47. 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. The holdings in column 5 include shares of Class C Common Stock received by the Reporting Person pursuant to the Class C Dividend. This transaction was executed in multiple trades at prices ranging from $41.50 to $41.66. 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. The reporting person beneficially owns 211,546 shares of Class A Common Stock, which include outstanding shares held by the Reporting Person and shares underlying performance-based restricted units previously granted to the Reporting Person which have been earned based on the Company performance but have not yet vested. These shares are not included on this form. Does not include 34,450,000 shares of Class B Common Stock held directly and indirectly by the reporting person. /s/ John P. Stanton, Attorney in Fact for Kevin A. Plank 2016-04-29