X0306 4/A 2017-02-15 2017-02-16 false 0001336917 Under Armour, Inc. UA 0001344637 Plank Kevin A 1020 HULL STREET BALTIMORE MD 21230 true true true false Chairman and CEO Class C Common Stock 2017-02-15 4 F false 22243 0 D 28954150 D Class C Common Stock 719722 I KD Plank LLC Class C Common Stock 1046123 I KD Plank #2 LLC Class C Common Stock 3107880 I By Plank Family Trust This amendment corrects the Amount of Securities Beneficially Owned Following Reported Transaction(s), which erroneously excluded shares received by the Reporting Person in June 2016 pursuant to a dividend and excluded shares indirectly held by the Reporting Person. On June 29, 2016, Under Armour, Inc. paid a dividend in the form of shares of Class C Common Stock to holders of Class C Common Stock pursuant to the settlement of the shareholder litigation related to the creation of the Class C Common Stock. The amended holdings in column 5 include any shares of Class C Common Stock received by the Reporting Person pursuant to these dividends, 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. Does not include Class A Common Stock or Class B Common Stock held by the Reporting Person. /s/ John P. Stanton, Attorney in Fact for Kevin A. Plank 2017-03-22