1st United Bancorp, Inc. Non-Transferable Subscription Rights Certificate for Common Stock Purchase

By Mail or Overnight Courier:

By Hand:

American Stock Transfer & Trust Company LLC
Operations Center
Attn: Reorganization Department
6201 15th Avenue
Brooklyn, NY 11219

Telephone Number for Confirmation ###-###-####

American Stock Transfer & Trust Company LLC
Attn: Reorganization Department
59 Maiden Lane, Plaza Level
New York, NY 10038

PLEASE PRINT ALL INFORMATION CLEARLY AND LEGIBLY

(a) EXERCISE OF BASIC SUBSCRIPTION RIGHTS: I subscribe for ________ shares at  $________ each  =   $____________

  (No. of new shares)

    (Subscription price)

                   (Amount enclosed)

(b) EXERCISE OF OVERSUBSCRIPTION RIGHTS: I subscribe for _________ shares at  $________ each  =   $____________

  (No. of new shares)

    (Subscription price)

                   (Amount enclosed)

NOTE: You may subscribe for additional shares pursuant to your Oversubscription Right only if you exercised your Basic Subscription Privilege in full.

METHOD OF PAYMENT (PLEASE INDICATE):

o   CHECK ENCLOSED: Personal check, certified check or cashier’s check drawn upon a U.S. bank, or express money order payable to American Stock Transfer & Trust Company, as Subscription Agent.

o

FUNDS WIRED: Wire transfer of immediately available funds directly to the account maintained by American Stock Transfer & Trust Company LLC, as Subscription Agent, for purposes of the Rights Offering at JPMorgan Chase Bank, ABA #021000021, Account # [__________] (PLEASE PROVIDE WIRE REFERENCE NUMBER): ____________________________

Print Full Name and Tax ID or Social Security Number and Address

SECTION 3-SIGNATURE

TO SUBSCRIBE: I acknowledge that I have received the Prospectus for this Rights Offering and I hereby irrevocably subscribe for the number of shares of Common Stock indicated above on the terms and conditions specified in the Prospectus.

Signature(s): ________________________________________________________________________

IMPORTANT: The signature(s) must correspond with the name(s) as printed on the reverse of this Subscription Rights Certificate in every particular, without alteration or enlargement, or any change whatsoever.

If you are signing in your capacity as a trustee, executor, administrator, guardian, attorney-in-fact, agent, officer of a corporation or another acting in a fiduciary or representative capacity, please provide the following information:

Name: _____________________________________________________________________________________________________________

Capacity: ___________________________________________ Tax ID or Social Security Number: ____________________________________

SECTION 4-SIGNATURE GUARANTEE

YOU MUST HAVE YOUR SIGNATURE(S) GUARANTEED IF YOU HAVE COMPLETED ANY PORTION OF SECTION 2

Signature Guaranteed: ___________________________________________________________________________________

(Name of Bank or Firm)

By: __________________________________________________________________________________________________

(Signature of Officer)

IMPORTANT: Your signature(s) must be guaranteed by an eligible guarantor institution (for example, a bank, stockbroker, savings & loan association or credit union) with membership in an approved signature guarantee medallion program pursuant to Rule 17Ad-15 of the Securities Exchange Act of 1934, and amended.

PLEASE CONSULT THE “INSTRUCTIONS AS TO THE USE OF 1^st UNITED BANCORP, INC. SUBSCRIPTION RIGHTS CERTIFICATES” ACCOMPANYING THIS SUBSCRIPTION RIGHTS CERTIFICATE. IF YOU HAVE QUESTIONS, PLEASE CONTACT JOHN MARINO, AT 1^st UNITED BANCORP, INC., AT ###-###-####, OR YOUR BANK OR BROKER.