X0306 4 2016-01-22 0 0001507881 USMD Holdings, Inc. USMD 0001556888 Brock Steven 1211 GREENBRIAR LANE ARLINGTON TX 76013 1 0 0 0 Common Stock ($.01 par) 17503 D Common Stock ($.01 par) 2016-01-22 4 J 0 469 2.13 A 36100 I Indirectly held through UANT Ventures, L.P. Right to purchase 23.37 2014-09-01 5% Convertible Subordinated Notes Due 2019 5750 5750 I Indirectly held through AOB Surgical Group, Ltd. Dr. Brock purchased additional partnership interests in UANT Ventures, LP ("Ventures"), which resulted in an increase in his indirect beneficial ownership of the shares of the issuer's common stock held by Ventures. The noteholder has the right at any time prior to the payment in full of the note, to convert all or any portion of the unpaid principal balance of the note into shares of the issuer's common stock. This conversion right expires on March 1, 2019, the maturity date of the note, or upon the earlier payment in full of the principal balance of the note. /s/ Steven Brock 2016-01-26