X0306 4 2017-02-12 0 0001504008 BankUnited, Inc. BKU 0001634049 Cornish Thomas M. C/O BANKUNITED, INC. 14817 OAK LANE MIAMI LAKES FL 33016 0 1 0 0 Chief Operating Officer Common Stock, par value $0.01 per share 2017-02-12 4 F 0 3730 38.78 D 107068 D Common Stock, par value $0.01 per share 400 I As Co-Trustee Shares of BankUnited, Inc. common stock withheld by the Issuer to satisfy the tax withholding obligation of the reporting person arising from the vesting of restricted shares on February 12, 2017. These shares were not sold by the reporting person but were instead withheld from the total number of vested shares received by the reporting person from the Issuer. Shares held by the P.A. Castellanos-Cornish Revocable Trust for which Mr. Cornish 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 any other purpose. /s/ Susan Greenfield as Attorney-in-Fact 2017-02-14