X0306 4 2018-01-25 0 0001504008 BankUnited, Inc. BKU 0001221213 PAULS DOUGLAS J C/O BANKUNITED, INC. 14817 OAK LANE MIAMI LAKES FL 33016 1 0 0 0 Common Stock, par value $0.01 per share 2018-01-25 4 G 0 1000 D 31380 D Common Stock, par value $0.01 per share 2018-01-25 4 M 0 40000 27.00 A 71380 D Common Stock, par value $0.01 per share 2018-01-25 4 S 0 40000 42.1168 D 31380 D Common Stock, par value $0.01 per share 31000 I As co-trustee Common Stock Option (right to buy) 27.00 2018-01-25 4 M 0 40000 0.00 D 2021-02-02 Common Stock, par value $0.01 per share 40000 141399 D Bona fide gift by the Reporting Person for no consideration. This price represents the weighted average sale price of trades transacted at a multitude of prices ranging from $42.00 to $42.61. 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 shares sold at each separate price. Shares held by the Pauls Family Foundation, for which Mr. Pauls 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. Issued pursuant to the terms of the BankUnited, Inc. 2010 Omnibus Equity Incentive Plan. All such options are currently exercisable. /s/ Susan Greenfield, as Attorney-in-Fact 2018-01-26