X0304 4 2012-02-29 1 0001504008 BankUnited, Inc. BKU 0001343206 BLACKSTONE CAPITAL PARTNERS V L P C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001511258 Blackstone Capital Partners V-AC L.P. C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001368609 Blackstone Management Associates V L.L.C. C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 0001368608 BMA V L.L.C. C/O THE BLACKSTONE GROUP 345 PARK AVENUE NEW YORK NY 10154 0 0 1 0 Common Stock 2012-02-29 4 J 0 4117032 D 6313634 I See footnotes Common Stock 2012-02-29 4 J 0 1287389 D 1974262 I See footnotes Common Stock 2012-02-29 4 J 0 7193 D 11031 I See footnotes Common Stock 2012-02-29 4 J 0 4180 D 6410 I See footnote Series A Nonvoting Convertible Preferred Stock 2012-02-29 4 J 0 4117032 A Common Stock 4117032 4117032 I See footnotes Series A Nonvoting Convertible Preferred Stock 2012-02-29 4 J 0 1287389 A Common Stock 1287389 1287389 I See footnotes Series A Nonvoting Convertible Preferred Stock 2012-02-29 4 J 0 7193 A Common Stock 7193 7193 I See footnotes Series A Nonvoting Convertible Preferred Stock 2012-02-29 4 J 0 4180 A Common Stock 4180 4180 I See footnote Pursuant to an exchange agreement approved by the Board of Directors of BankUnited, Inc., shares of common stock, par value $0.01 per share ("Common Stock"), of BankUnited, Inc. were exchanged for a like number of shares of Series A Nonvoting Convertible Preferred Stock, par value $0.01 per share. These securities are held by Blackstone Capital Partners V L.P. ("BCP V"). These securities are held by Blackstone Capital Partners V-AC L.P. ("BCP V-AC"). These securities are held by Blackstone Family Investment Partnership V L.P. ("Family"). These securities are held by Blackstone Participation Partnership V L.P. ("Participation"). The general partner of BCP V and BCP V-AC is Blackstone Management Associates V L.L.C. BMA V L.L.C. is the sole member of Blackstone Management Associates V L.L.C. The general partner of Family and Participation is BCP V Side-By-Side GP L.L.C. Blackstone Holdings III L.P. is the managing member and the owner of a majority in interest of BMA V L.L.C. and the sole member of BCP V Side-By-Side GP L.L.C. Blackstone Holdings III L.P. is indirectly controlled by The Blackstone Group L.P. The Blackstone Group L.P. is controlled by its general partner, Blackstone Group Management L.L.C., which is in turn controlled by its founder, Stephen A. Schwarzman. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein. The filing of this statement shall not be deemed to be an admission that, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the Reporting Persons are the beneficial owners of any securities reported herein. The Series A Nonvoting Convertible Preferred Stock is convertible into shares of Common Stock on a one-for-one basis. The Series A Nonvoting Convertible Preferred Stock is convertible into shares of Common Stock immediately upon issuance. The conversion of the Series A Nonvoting Convertible Preferred Stock has no expiration date. Because no more than 10 reporting persons can file any one Form 4 through the Securities and Exchange Commission's EDGAR system, Blackstone Family Investment Partnership V, L.P., Blackstone Participation Partnership V, L.P., BCP V Side-by-Side GP L.L.C., Blackstone Holdings III L.P., The Blackstone Group L.P., Blackstone Group Management L.L.C. and Stephen A. Schwarzman have filed a separate Form 4. Blackstone Capital Partners V L.P. By: /s/ Chinh Chu Name: Chinh Chu Title: Authorized Person 2012-02-29 Blackstone Capital Partners V-AC L.P. By: /s/ Chinh Chu Name: Chinh Chu Title: Authorized Person 2012-02-29 Blackstone Management Associates V L.L.C. By: /s/ Chinh Chu Name: Chinh Chu Title: Authorized Person 2012-02-29 BMA V L.L.C. By: /s/ Chinh Chu Name: Chinh Chu Title: Authorized Person 2012-02-29