X0306 4 2019-03-15 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 2019-03-15 4 M 0 9410 35.84 A 95857 D Common Stock, par value $0.01 per share 2019-03-15 4 D 0 9410 35.84 D 86447 D Common Stock, par value $0.01 per share 400 I As Co-Trustee Restricted Stock Unit 2019-03-15 4 M 0 9410 0.00 D Common Stock, par value $0.01 per share 9410 13932 D 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. Each restricted stock unit represents the right to receive, at settlement, one share of common stock or cash in an amount equal to the fair market value of one share of common stock. Issued pursuant to the terms of the BankUnited, Inc. 2014 Omnibus Equity Incentive Plan. 4,887 units vested on December 31, 2017, 9,410 units vested on December 31, 2018, 9,409 units will vest on December 31, 2019, and 4,523 units will vest on December 31, 2020. /s/ Susan Greenfield, Attorney-in-Fact 2019-03-19