X0306 4 2021-03-31 0 0001504008 BankUnited, Inc. BKU 0001510616 Singh Rajinder P C/O BANKUNITED, INC. 14817 OAK LANE MIAMI LAKES FL 33016 1 1 0 1 President and CEO Chairman of the Board Restricted Stock Unit 2021-03-31 4 A 0 32708 0.00 A Common Stock, par value $0.01 per share 32708 32708 D 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. 8,177 units will vest on each of December 31, 2021, December 31, 2022, December 31, 2023 and December 31, 2024. /s/ Susan Greenfield, Attorney-in-Fact 2021-04-01