Prosperity Bancshares, Inc.(R) Invites You to Join Its Second Quarter Earnings Conference...

Prosperity Bancshares, Inc.(R) Invites You to Join Its Second Quarter Earnings
Conference Call on the Web

HOUSTON, June 30 /PRNewswire-FirstCall/ -- In conjunction with Prosperity
Bancshares, Inc.(R) (Nasdaq: PRSP) Second Quarter Earnings Announcement,
scheduled before the market opens on Friday, July 17, 2009, you are invited to
listen to its conference call that will be broadcast live over the Internet at
10:30 AM, Eastern Daylight Time (9:30 AM, Central Daylight Time) on Friday,
July 17, 2009. Participants will include David Zalman, Chairman and Chief
Executive Officer; Dan Rollins, President and Chief Operating Officer; Tim
Timanus, Vice Chairman; and David Hollaway, CPA, Chief Financial Officer.
What: Prosperity Bancshares, Inc.(R) Second Quarter Earnings
Announcement

When: Friday, July 17, 2009 9:30 AM (Central Daylight Time)

Where: www.prosperitybanktx.com on the Investor Relations page

How: Live over the Internet -- Simply log on to the web at the
address above or call 800-895-4790, the reference code is PBTX

Contact: Dan Rollins, President & Chief Operating Officer at
(281) 269-7199 or dan.rollins@prosperitybanktx.com

If you are unable to participate during the live webcast, the call will be
archived on the website at http://www.prosperitybanktx.com on the Investor
Relations page. To access the replay, click on the conference call section and
follow the instructions.

Prosperity Bancshares, Inc.(R)

Prosperity Bancshares, Inc.(R), an $8.9 billionHouston, Texas based regional
financial holding company, formed in 1983, operates under a community banking
philosophy and seeks to develop broad customer relationships based on service
and convenience. Prosperity offers a variety of traditional loan and deposit
products to its customers, which consist primarily of small and medium sized
businesses and consumers. In addition to established banking products,
Prosperity offers a complete line of services including: Internet Banking
services at http://www.prosperitybanktx.com, Retail Brokerage Services,
MasterMoney Debit Cards, and 24 hour voice response banking. Prosperity
currently operates one hundred fifty-eight (158) full service banking
locations; fifty-one (51) in the Houston area; twenty-seven (27) in the South
Texas area including Corpus Christi and Victoria; twenty-four (24) in the
Dallas/Fort Worth area; twenty (20) in the East Texas area; twenty-seven (27)
in the Central Texas area including Austin and San Antonio; and nine (9) in
the Bryan/College Station area.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of
1995: This release contains, and the remarks by our management on the
conference call may contain, forward-looking statements within the meaning of
the securities laws that are based on current expectations, assumptions,
estimates and projections about Prosperity Bancshares(R), and its
subsidiaries. These forward-looking statements are not guarantees of future
performance and are subject to risks and uncertainties, many of which are
outside of Prosperity's control, that may cause actual results to differ
materially from those expressed or implied by the forward-looking statements.
These risks and uncertainties include but are not limited to whether
Prosperity can: successfully identify acquisition targets and integrate the
businesses of acquired companies and banks; continue to sustain its current
internal growth rate or total growth rate; provide products and services that
appeal to its customers; continue to have access to debt and equity capital
markets; and achieve its sales objectives. Other risks include, but are not
limited to: the possibility that credit quality could deteriorate; actions of
competitors; changes in laws and regulations (including changes in
governmental interpretations of regulations and changes in accounting
standards); a deterioration or downgrade in the credit quality and credit
agency ratings of the securities in Prosperity's securities portfolio;
customer and consumer demand, including customer and consumer response to
marketing; effectiveness of spending, investments or programs; fluctuations in
the cost and availability of supply chain resources; economic conditions,
including currency rate fluctuations and interest rate fluctuations; weather.
These and various other factors are discussed in Prosperity's Annual Report on
Form 10-K for the year ended December 31, 2008 and other reports and
statements we have filed with the SEC. Copies of the SEC filings for
Prosperity Bancshares's(R) may be downloaded from the Internet at no charge
from www.prosperitybanktx.com.

SOURCE Prosperity Bancshares, Inc.

Dan Rollins, President and Chief Operating Officer of Prosperity Bancshares,
Inc., +1-281-269-7199, dan.rollins@prosperitybanktx.com