X0305 4 2012-05-03 0 0001504008 BankUnited, Inc. BKU 0001211582 LEFRAK RICHARD S C/O BANKUNITED, INC. 14817 OAK LANE MIAMI LAKES FL 33016 1 0 0 0 Common Stock, par value $0.01 per share 2012-05-03 4 S 0 47555 24.4835 D 1108837 I By LF Moby LLC Common Stock, par value $0.01 per share 2012-05-04 4 S 0 35208 24.0957 D 1073629 I By LF Moby LLC Common Stock, par value $0.01 per share 2012-05-07 4 S 0 17350 24.2131 D 1056279 I By LF Moby LLC Common Stock, par value $0.01 per share 1000 D This price represents the weighted average sale price of trades transacted at a multitude of prices ranging from $24.35 to $24.65. 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. As described in the BankUnited, Inc. Registration Statement on Form S-1 (File No. 333-170203), the shares are held in the account of LF Moby LLC, a private investment entity over which the reporting person and his sons, Harrison T. LeFrak and James T. LeFrak, have investment discretion. 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. This price represents the weighted average sale price of trades transacted at a multitude of prices ranging from $23.9603 to $24.2950. 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. This price represents the weighted average sale price of trades transacted at a multitude of prices ranging from $24.01 to $24.39. 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. Vests one-third on each of the first, second and third anniversaries of February 15, 2012. Issued on February 15, 2012 pursuant to the BankUnited, Inc. 2010 Omnibus Equity Incentive Plan. /s/ Douglas J. Pauls, as Attorney-in-Fact 2012-05-07