X0306 4 2013-03-13 0 0001504008 BankUnited, Inc. BKU 0001194345 KANAS JOHN ADAM C/O BANKUNITED, INC. 14817 OAK LANE MIAMI LAKES FL 33016 1 1 0 0 Chairman, President and CEO Common Stock, par value $0.01 per share 2013-03-13 4 S 0 526087 24.745 D 1867945 D Common Stock, par value $0.01 per share 2013-03-13 4 S 0 273913 24.745 D 41087 I As Co-Trustee Common Stock, par value $0.01 per share 709045 I As Trustee Reflects the sale of 526,087 shares of common stock of BankUnited, Inc. by John A. Kanas in a secondary offering of BankUnited, Inc. that closed on March 13, 2013. Reflects the sale of 273,913 shares of common stock of BankUnited, Inc. by the John and Elaine Kanas Family Foundation in a secondary offering of BankUnited, Inc. that closed on March 13, 2013. Shares held by the John and Elaine Kanas Foundation Family Foundation, for which the reporting person serves as a co-trustee. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of these shares for Section 16 or for any other purpose. Shares held by the Kanas 2011 Annuity Trust, over which the reporting person is the trustee. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of these shares for Section 16 or for any other purpose. /s/ Rajinder P. Singh, as Attorney-in-Fact 2013-03-15