SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* BLACKSTONE CAPITAL PARTNERS V L P (Last) (First) (Middle) C/O THE BLACKSTONE GROUP 345 PARK AVENUE (Street) NEW YORK NY 10154 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 01/27/2011	3. Issuer Name and Ticker or Trading Symbol BankUnited, Inc. [ BKU ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	15,545,269	I	See footnote(1)(5)(6)
Common Stock	4,860,977	I	See footnote(2)(5)(6)
Common Stock	27,160	I	See footnote(3)(5)(6)
Common Stock	15,783	I	See footnote(4)(5)(6)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* BLACKSTONE CAPITAL PARTNERS V L P (Last) (First) (Middle) C/O THE BLACKSTONE GROUP 345 PARK AVENUE (Street) NEW YORK NY 10154 (City) (State) (Zip)

1. Name and Address of Reporting Person* Blackstone Capital Partners V-AC L.P. (Last) (First) (Middle) C/O THE BLACKSTONE GROUP 345 PARK AVENUE (Street) NEW YORK NY 10154 (City) (State) (Zip)

1. Name and Address of Reporting Person* BLACKSTONE MANAGEMENT ASSOCIATES IV LLC (Last) (First) (Middle) C/O THE BLACKSTONE GROUP 345 PARK AVENUE (Street) NEW YORK NY 10154 (City) (State) (Zip)

1. Name and Address of Reporting Person* BMA V L.L.C. (Last) (First) (Middle) C/O THE BLACKSTONE GROUP 345 PARK AVENUE (Street) NEW YORK NY 10154 (City) (State) (Zip)

Explanation of Responses:

1. These securities are held by Blackstone Capital Partners V L.P. ("BCP V").

2. These securities are held by Blackstone Capital Partners V-AC L.P. ("BCP V-AC").

3. These securities are held by Blackstone Family Investment Partnership V L.P. ("Family").

4. These securities are held by Blackstone Participation Partnership V L.P. ("Participation").

5. 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.

6. 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.

Remarks:

Because no more than 10 reporting persons can file any one Form 3 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 3.

	Blackstone Capital Partners V L.P. By: /s/ Robert L. Friedman Title: Authorized Person	01/27/2011
	Blackstone Capital Partners V-AC L.P. By: /s/ Robert L. Friedman Title: Authorized Person	01/27/2011
	Blackstone Management Associates V L.L.C. By: /s/ Robert L. Friedman Title: Authorized Person	01/27/2011
	BMA V L.L.C. By: /s/ Robert L. Friedman Title: Authorized Person	01/27/2011
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.