X0306 4 2019-02-12 0 0001504008 BankUnited, Inc. BKU 0001578337 LUNAK LESLIE C/O BANKUNITED, INC. 14817 OAK LANE MIAMI LAKES FL 33016 0 1 0 0 Chief Financial Officer Common Stock, par value $0.01 per share 2019-02-12 4 F 0 1643 35.44 D 55945 D 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, 2019. 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. /s/ Susan Greenfield, Attorney-in-Fact 2019-02-14