Prosperity Bancshares Annual Report 2006

FY2006 Annual Report · Prosperity Bancshares
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

(Mark One)
È ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 (D) OF THE SECURITIES

EXCHANGE ACT OF 1934
For The Fiscal Year Ended December 31, 2006

OR
‘ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES

EXCHANGE ACT OF 1934
For the transition period from

to

Commission File Number 0-25051

PROSPERITY BANCSHARES, INC.®

(Exact name of registrant as specified in its charter)

TEXAS
(State or other jurisdiction of
incorporation or organization)

PROSPERITY BANK PLAZA
4295 SAN FELIPE
HOUSTON, TEXAS
(Address of principal executive offices)

74-2331986
(I.R.S. Employer
Identification No.)

77027
(Zip Code)

Registrant’s Telephone Number, Including Area Code: (713) 693-9300

Securities registered pursuant to Section 12(b) of the Act:

Common Stock, par value
$1.00 per share

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if

Act. Yes ‘ No È

the registrant

is a well-known seasoned issuer, as defined in Rule 405 of

the Securities

Indicate by check mark if the registrant

Act. Yes ‘ No È

is not required to file reports pursuant

to Section 13 or Section 15 (d) of the

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities
Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and
(2) has been subject to such filing requirements for the past 90 days. Yes È No ‘

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not
be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of the
Form 10-K or any amendment of this Form 10-K. ‘

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition

of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check One):

Large Accelerated Filer È

Accelerated Filer ‘

Non-accelerated Filer ‘

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ‘ No È
The aggregate market value of the shares of Common Stock held by non-affiliates as of June 30, 2006, based on the closing price of

the Common Stock on the Nasdaq National Market System on June 30, 2006 was approximately $885.3 million.

As of February 28, 2007, the number of outstanding shares of Common Stock was 43,667,909.

Documents Incorporated by Reference:

Portions of the Company’s Proxy Statement relating to the 2007 Annual Meeting of Shareholders, which will be filed within 120 days

after December 31, 2006, are incorporated by reference into Part III, Items 10-14 of this Form 10-K.

PROSPERITY BANCSHARES, INC.®
2006 ANNUAL REPORT ON FORM 10-K

TABLE OF CONTENTS

PART I

PART II

Item 1. Business . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2006 Acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of Texas United Bancshares, Inc.
Available Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Officers and Associates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Banking Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Business Strategies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Competition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supervision and Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 1A. Risk Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 1B. Unresolved Staff Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 2.
Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 3. Legal Proceedings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Submission of Matters to a Vote of Security Holders . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 4.

Item 5. Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer

Purchases of Equity Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selected Consolidated Financial Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Item 6.
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of

Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of Texas United Bancshares, Inc.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Critical Accounting Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Results of Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Financial Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 7A. Quantitative and Qualitative Disclosures about Market Risk . . . . . . . . . . . . . . . . . . . . .
Financial Statements and Supplementary Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 8.
Item 9. Changes In and Disagreements with Accountants on Accounting and Financial

Disclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 9A. Controls and Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 9B. Other Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PART III

PART IV

Item 10. Directors, Executive Officers and Corporate Governance . . . . . . . . . . . . . . . . . . . . . . .
Item 11. Executive Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related

Shareholder Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Item 13. Certain Relationships, Related Transactions and Director Independence . . . . . . . . . . . .
Item 14. Principal Accountant Fees and Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Item 15. Exhibits, Financial Statement Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signatures

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ITEM 1. BUSINESS

General

PART I

Prosperity Bancshares, Inc.®, a Texas corporation (the “Company”), was formed in 1983 as a vehicle to
acquire the former Allied Bank in Edna, Texas which was chartered in 1949 as The First National Bank of Edna.
The Company is a registered financial holding company that derives substantially all of its revenues and income
from the operation of its bank subsidiary, Prosperity Bank® (“Prosperity Bank®” or the “Bank”). The Bank
provides a broad line of financial products and services to small and medium-sized businesses and consumers. As
of December 31, 2006, the Bank operated eighty-eight (88) full-service banking locations; with thirty-eight
(38) in the Greater Houston Consolidated Metropolitan Statistical Area (“CMSA”), seventeen (17) in fifteen
contiguous counties situated south and southwest of Houston and extending into South Texas, five (5) in the
Austin, Texas area, fifteen (15) in the Corpus Christi, Texas area, two (2) in East Texas and eleven (11) in the
Dallas/Fort Worth, Texas area. The Greater Houston CMSA includes Austin, Brazoria, Chambers, Fort Bend,
Galveston, Harris, Liberty, Montgomery, San Jacinto and Waller counties. The Company’s headquarters are
located at Prosperity Bank Plaza, 4295 San Felipe in Houston, Texas and its telephone number
is
(713) 693-9300. The Company’s website address is www.prosperitybanktx.com.

The Company’s market consists of the communities served by its banking centers. The diverse nature of the
economies in each local market served by the Company provides the Company with a varied customer base and
allows the Company to spread its lending risk throughout a number of different industries including farming,
ranching, petrochemicals, manufacturing, tourism, recreation and professional service firms and their principals.
The Company’s market areas outside of Houston, Dallas, Corpus Christi and Austin are dominated by either
small community banks or branches of large regional banks. Management believes that the Company, as one of
the few mid-sized financial institutions that combines responsive community banking with the sophistication of a
regional bank holding company, has a competitive advantage in its market areas and excellent growth
opportunities through acquisitions, new banking center locations and additional business development.

Operating under a community banking philosophy,

the Company seeks to develop broad customer
relationships based on service and convenience while maintaining its conservative approach to lending and
strong asset quality. The Company has grown through a combination of internal growth, the acquisition of
community banks, branches of banks and the opening of new banking centers. Utilizing a low cost of funds and
employing stringent cost controls, the Company has been profitable in every full year of its existence, including
the period of adverse economic conditions in Texas in the late 1980s. From 1988 to 1992, as a sound and
profitable institution, the Company took advantage of this economic downturn and acquired the deposits and
certain assets of failed banks in West Columbia, El Campo and Cuero, Texas and two failed banks in Houston,
which diversified the Company’s franchise and increased its core deposits. The Company opened a full-service
banking center in Victoria, Texas in 1993 and the following year established a banking center in Bay City, Texas.
The Company expanded its Bay City presence in 1996 with the acquisition of an additional branch location from
Norwest Bank Texas (now Wells Fargo), and in 1997, the Company acquired the Angleton, Texas branch of
Wells Fargo Bank. In 1998, the Company enhanced its West Columbia Banking Center with the purchase of a
commercial bank branch located in West Columbia and acquired Union State Bank in East Bernard, Texas.

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From December 31, 1998 through December 31, 2006, the Company grew through internal growth and the

completion of the following acquisitions:

Acquired Entity

Acquired Bank

Completion
Date

Number of
Banking Centers
Added(1)

South Texas Bancshares, Inc. . . . . . . . . . . . . . . . Commercial State Bank
Compass Bank (5 branches) . . . . . . . . . . . . . . . . N/A
Commercial Bancshares, Inc. . . . . . . . . . . . . . . . Heritage Bank
. . . . . . . . . . . . . . . . Same
Texas Guaranty Bank, N.A.
The First State Bank of Needville . . . . . . . . . . . Same
Paradigm Bancorporation, Inc. . . . . . . . . . . . . . . Paradigm Bank Texas
Southwest Bank Holding Company . . . . . . . . . . Bank of the Southwest
First National Bank of Bay City . . . . . . . . . . . . . Same
Abrams Centre Bancshares, Inc. . . . . . . . . . . . . . Abrams Centre National Bank
Dallas Bancshares, Inc. . . . . . . . . . . . . . . . . . . . . BankDallas
MainBancorp, Inc.
First State Bank of North Texas . . . . . . . . . . . . . Same
Liberty Bancshares, Inc. . . . . . . . . . . . . . . . . . . . Liberty Bank, S.S.B.
Village Bank and Trust, s.s.b . . . . . . . . . . . . . . . Same
First Capital Bankers, Inc.
Grapeland Bancshares, Inc.
SNB Bancshares, Inc . . . . . . . . . . . . . . . . . . . . . Southern National Bank of Texas

. . . . . . . . . . . . . . . . . FirstCapital Bank, s.s.b.
. . . . . . . . . . . . . . . . First State Bank of Grapeland

. . . . . . . . . . . . . . . . . . . . . . . mainbank, n.a.

1999
2000
2001
2002
2002
2002
2002
2002
2003
2003
2003
2003
2004
2004
2005
2005
2006

3
4
12
3
— (2)
8
2
— (2)
1
1
4
3
4
1
25
2
6(3)

(1) The number of banking centers added does not include any locations of the acquired entity that were closed
and consolidated into existing banking centers of the Company upon consummation of the transaction or
closed after consummation of the transaction

(2) The only banking center of the acquired entity was closed and consolidated into an existing banking center

of the Company.
Includes one banking center under construction at the time of consummation.

(3)

2006 Acquisition

On April 1, 2006, the Company completed its acquisition of SNB Bancshares, Inc., Sugar Land, Texas
(“SNB”). Under the terms of the merger agreement, SNB was merged into the Company and subsequently,
SNB’s wholly owned subsidiary, Southern National Bank of Texas, was merged into Prosperity Bank®
(“Prosperity Bank®” or the “Bank”). The Company issued approximately 4.448 million shares of its common
stock and $93.3 million in cash for all of the issued and outstanding capital stock of SNB. In addition, options to
acquire 761,950 shares of SNB common stock were converted into options to acquire 467,578 shares of
Company common stock. All remaining options to acquire SNB common stock were cancelled and redeemed for
cash prior to the merger. In connection with the merger, the Company assumed $30.9 million in junior
subordinated debentures issued to three subsidiary trusts. SNB was publicly traded and operated five (5) banking
offices in Fort Bend County, Houston and Katy, Texas and two (2) stand alone motor banks in Houston, Texas.
At the time of acquisition, SNB had an additional banking office under construction in Katy, Texas, which
became a full-service banking center of the Company upon completion in July 2006. As of December 31, 2005,
SNB had, on a consolidated basis, total assets of $1.025 billion, loans (including loans held for sale) of $652.8
million, deposits of $892.0 million and shareholders’ equity of $82.5 million.

Acquisition of Texas United Bancshares, Inc.

On January 31, 2007, the Company completed its acquisition of Texas United Bancshares, Inc., La Grange,
Texas (“TXUI”). Under the terms of the merger agreement, TXUI was merged into the Company and
subsequently each of TXUI’s wholly owned subsidiary banks, State Bank, GNB Financial, n.a., Gateway

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National Bank and Northwest Bank, was merged into the Bank. The Company issued approximately
10.770 million shares of its common stock for all of the issued and outstanding capital stock of TXUI. In
addition, options to acquire 179,956 shares of TXUI common stock were converted into options to acquire
179,956 shares of Company common stock. In connection with the acquisition, the Company assumed $44.8
million in junior subordinated debentures issued to five subsidiary trusts. TXUI was publicly traded and operated
forty-one (41) banking offices in Texas. As of December 31, 2006, TXUI had, on a consolidated basis, total
assets of $1.806 billion, loans (including loans held for sale) of $1.212 billion, deposits of $1.362 billion and
shareholders’ equity of $161.9 million.

Available Information

The Company’s website address is www.prosperitybanktx.com. The Company makes available free of
charge on or through its website its annual report on Form 10-K, quarterly reports on Form 10-Q, current reports
on Form 8-K and all amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the
Securities Exchange Act of 1934, as amended, as soon as reasonably practicable after such material
is
electronically filed with or furnished to the Securities and Exchange Commission. Information contained on the
Company’s website is not incorporated by reference into this annual report on Form 10-K and is not part of this
or any other report.

Officers and Associates

The Company’s directors and officers are important to the Company’s success and play a key role in the
Company’s business development efforts by actively participating in civic and public service activities in the
communities served by the Company.

The Company has invested heavily in its officers and associates by recruiting talented officers in its market
areas and providing them with economic incentive in the form of stock-based compensation and bonuses based
on cross-selling performance. The senior management team has substantial experience in the Houston, Dallas,
Austin and Corpus Christi markets and the surrounding communities in which the Company has a presence. Each
banking center location is administered by a local president or manager with knowledge of the community and
lending expertise in the specific industries found in the community. The Company entrusts its banking center
Presidents and Managers with authority and flexibility within general parameters with respect to product pricing
and decision making in order to avoid the bureaucratic structure of larger banks. The Company operates each
banking center as a separate profit center, maintaining separate data with respect to each banking center’s net
interest income, efficiency ratio, deposit growth, loan growth and overall profitability. Banking center presidents
and managers are accountable for performance in these areas and compensated accordingly. The Company’s
local banking centers have no 1-800 telephone numbers. Each banking center has its own listed local business
telephone number, which enables a customer to be served by a local banker with decision making authority.

As of December 31, 2006, the Company and the Bank had 908 full-time equivalent associates, 344 of whom
were officers of the Bank. The Company provides medical and hospitalization insurance to its full-time
associates. The Company considers its relations with associates to be excellent. Neither the Company nor the
Bank is a party to any collective bargaining agreement.

Banking Activities

The Company, through the Bank, offers a variety of traditional loan and deposit products to its customers,
which consist primarily of consumers and small and medium-sized businesses. The Bank tailors its products to
the specific needs of customers in a given market. At December 31, 2006, the Bank maintained approximately
192,000 separate deposit accounts and 22,000 separate loan accounts and 22.4% of the Bank’s total deposits were
noninterest-bearing demand deposits. For the year ended December 31, 2006, the Company’s average cost of
funds was 2.56% and the Company’s average cost of deposits (excluding all borrowings) was 2.35%.

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The Company has been an active mortgage lender, with commercial mortgage and 1-4 family residential
loans comprising 54.2% of the Company’s total loans as of December 31, 2006. The Company also offers loans
for automobiles and other consumer durables, home equity loans, debit cards, internet banking and other cash
management services and automated telephone banking. By offering certificates of deposit, checking with
the Company gives its
interest accounts, savings accounts and overdraft protection at competitive rates,
depositors a full range of traditional deposit products.

The businesses targeted by the Company in its lending efforts are primarily those that require loans in the
$100,000 to $8.0 million range. The Company offers these businesses a broad array of loan products including
term loans, lines of credit and loans for working capital, business expansion and the purchase of equipment and
machinery, interim construction loans for builders and owner-occupied commercial real estate loans.

Business Strategies

The Company’s main objective is to increase deposits and loans internally, as well as through additional
individualized customer service and maximizing

expansion opportunities, while maintaining efficiency,
profitability. To achieve this objective, the Company has employed the following strategic goals:

Continue Community Banking Emphasis. The Company intends to continue operating as a community
banking organization focused on meeting the specific needs of consumers and small and medium-sized
businesses in its market areas. The Company will continue to provide a high degree of responsiveness combined
with a wide variety of banking products and services. The Company staffs its banking centers with experienced
bankers with lending expertise in the specific industries found in the community, giving them authority to make
certain pricing and credit decisions, thereby attempting to avoid the bureaucratic structure of larger banks.

Expand Market Share Through Internal Growth and a Disciplined Acquisition Strategy. The Company
intends to continue seeking opportunities, both inside and outside its existing markets, to expand either by
acquiring existing banks or branches of banks or by establishing new banking centers. All of the Company’s
acquisitions have been accretive to earnings within 12 months after acquisition date and generally have supplied
the Company with relatively low-cost deposits which have been used to fund the Company’s lending and
investing activities. However, the Company makes no guarantee that future acquisitions, if any, will be accretive
to earnings within any particular time period. Factors used by the Company to evaluate expansion opportunities
include the similarity in management and operating philosophies, whether the acquisition will be accretive to
earnings and enhance shareholder value, the ability to achieve economies of scale to improve the efficiency ratio
and the opportunity to enhance the Company’s market presence.

Increase Loan Volume and Diversify Loan Portfolio. While maintaining its conservative approach to
the Company has emphasized both new and existing loan products, focusing on growing its
lending,
loan portfolios. During the two-year period from
construction, commercial mortgage and commercial
December 31, 2004 to December 31, 2006, the Company’s construction loans grew from $109.6 million to
$433.2 million, or 295.3%, and represented 10.6% and 19.9% of the total portfolio, respectively. The Company’s
commercial and industrial loans grew from $144.4 million to $281.0 million, or 94.5%, and represented 13.9%
and 12.9% of the total portfolio, respectively. Commercial mortgages increased from $369.2 million to $803.1
million, or 117.6%, and represented 35.6% and 36.9% of the total portfolio, respectively, for the same period. In
addition, the Company targets professional service firms including legal and medical practices for both loans
secured by owner-occupied premises and personal loans to their principals.

Continue Strict Focus on Efficiency. The Company plans to maintain its stringent cost control practices and
policies. The Company has invested significantly in the infrastructure required to centralize many of its critical
operations, such as data processing and loan processing. For its banking centers, which the Company operates as
independent profit centers, the Company supplies complete support in the areas of loan review, internal audit,
compliance and training. Management believes that this centralized infrastructure can accommodate additional
growth while enabling the Company to minimize operational costs through certain economies of scale.

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Enhance Cross-Selling. The Company recognizes that its customer base provides significant opportunities to
cross-sell various products and it seeks to develop broader customer relationships by identifying cross-selling
opportunities. The Company uses incentives and friendly competition to encourage cross-selling efforts and
increase cross-selling results among its associates. Officers and associates have access to each customer’s
existing and related account relationships and are better able to inform customers of additional products when
customers visit or call the various banking centers or use their drive-in facilities. In addition, the Company
includes product information in monthly statements and other mailings.

Maintain Strong Asset Quality. The Company intends to maintain the strong asset quality that has been
representative of its historical loan portfolio. As the Company diversifies and increases its lending activities, it
may face higher risks of nonpayment and increased risks in the event of economic downturns. The Company
intends, however, to continue to employ the strict underwriting guidelines and comprehensive loan review
process that has contributed to its low incidence of nonperforming assets and its minimal charge-offs in relation
to its size.

Competition

The banking business is highly competitive, and the profitability of the Company depends principally on its
ability to compete in its market areas. The Company competes with other commercial banks, savings banks,
savings and loan associations, credit unions, finance companies, mutual funds, insurance companies, brokerage
and investment banking firms, asset-based nonbank lenders and certain other nonfinancial entities, including
retail stores which may maintain their own credit programs and certain governmental organizations which may
offer more favorable financing than the Company. The Company believes it has been able to compete effectively
with other financial institutions by emphasizing customer service, technology and responsive decision-making
with respect to loans; by establishing long-term customer relationships and building customer loyalty; and by
providing products and services designed to address the specific needs of its customers.

Supervision and Regulation

The supervision and regulation of bank holding companies and their subsidiaries is intended primarily for
the protection of depositors, the deposit insurance funds of the Federal Deposit Insurance Corporation (“FDIC”)
and the banking system as a whole, and not for the protection of the bank holding company shareholders or
creditors. The banking agencies have broad enforcement power over bank holding companies and banks
including the power to impose substantial fines and other penalties for violations of laws and regulations.

The following description summarizes some of the laws to which the Company and the Bank are subject.
References in this annual report on Form 10-K to applicable statutes and regulations are brief summaries thereof,
do not purport to be complete, and are qualified in their entirety by reference to such statutes and regulations.

The Company

The Company is a financial holding company pursuant to the Gramm-Leach-Bliley Act and a bank holding
company registered under the Bank Holding Company Act of 1956, as amended (“BHCA”). Accordingly, the
Company is subject to supervision, regulation and examination by the Board of Governors of the Federal Reserve
System (“Federal Reserve Board”). The Gramm-Leach-Bliley Act, the BHCA and other federal laws subject
financial and bank holding companies to particular restrictions on the types of activities in which they may
engage, and to a range of supervisory requirements and activities, including regulatory enforcement actions for
violations of laws and regulations.

Regulatory Restrictions on Dividends; Source of Strength. It is the policy of the Federal Reserve Board that
bank holding companies should pay cash dividends on common stock only out of income available over the past
year and only if prospective earnings retention is consistent with the organization’s expected future needs and

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financial condition. The policy provides that bank holding companies should not maintain a level of cash
dividends that undermines the bank holding company’s ability to serve as a source of strength to its banking
subsidiaries.

Under Federal Reserve Board policy, a bank holding company is expected to act as a source of financial
strength to each of its banking subsidiaries and commit resources to their support. Such support may be required
at times when, absent this Federal Reserve Board policy, a holding company may not be inclined to provide it.
As discussed below, a bank holding company, in certain circumstances, could be required to guarantee the capital
plan of an undercapitalized banking subsidiary.

In the event of a bank holding company’s bankruptcy under Chapter 11 of the U.S. Bankruptcy Code, the
trustee will be deemed to have assumed and is required to cure immediately any deficit under any commitment
by the debtor holding company to any of the federal banking agencies to maintain the capital of an insured
depository institution. Any claim for breach of such obligation will generally have priority over most other
unsecured claims.

Scope of Permissible Activities. Under the BHCA, bank holding companies generally may not acquire a
direct or indirect interest in or control of more than 5% of the voting shares of any company that is not a bank or
bank holding company or from engaging in activities other than those of banking, managing or controlling banks
or furnishing services to or performing services for its subsidiaries, except that it may engage in, directly or
indirectly, certain activities that the Federal Reserve Board determined to be closely related to banking or
managing and controlling banks as to be a proper incident thereto. In approving acquisitions or the addition of
activities, the Federal Reserve considers whether the acquisition or the additional activities can reasonably be
expected to produce benefits to the public, such as greater convenience, increased competition, or gains in
efficiency, that outweigh such possible adverse effects as undue concentration of resources decreased or unfair
competition, conflicts of interest or unsound banking practices.

Notwithstanding the foregoing, the Gramm-Leach-Bliley Act, effective March 11, 2000, eliminated the
barriers to affiliations among banks, securities firms, insurance companies and other financial service providers
and permits bank holding companies to become financial holding companies and thereby affiliate with securities
firms and insurance companies and engage in other activities that are financial in nature. The Gramm-Leach-
Bliley Act defines “financial
in nature” to include securities underwriting, dealing and market making;
sponsoring mutual funds and investment companies; insurance underwriting and agency; merchant banking
activities; and activities that the Federal Reserve Board has determined to be closely related to banking. No
regulatory approval will be required for a financial holding company to acquire a company, other than a bank or
savings association, engaged in activities that are financial in nature or incidental to activities that are financial in
nature, as determined by the Federal Reserve Board.

Under the Gramm-Leach-Bliley Act, a bank holding company may become a financial holding company by
filing a declaration with the Federal Reserve Board if each of its subsidiary banks is well capitalized under the
Federal Deposit Insurance Corporation Improvement Act prompt corrective action provisions, is well managed,
and has at least a satisfactory rating under the Community Reinvestment Act of 1977. The Company became a
financial holding company on April 18, 2000.

While the Federal Reserve Board is the “umbrella” regulator for financial holding companies and has the
power to examine banking organizations engaged in new activities, regulation and supervision of activities which
are financial in nature or determined to be incidental to such financial activities will be handled along functional
lines. Accordingly, activities of subsidiaries of a financial holding company will be regulated by the agency or
authorities with the most experience regulating that activity as it is conducted in a financial holding company.

Safe and Sound Banking Practices. Bank holding companies are not permitted to engage in unsafe and
unsound banking practices. The Federal Reserve Board’s Regulation Y, for example, generally requires a holding

8

company to give the Federal Reserve Board prior notice of any redemption or repurchase of its own equity
securities, if the consideration to be paid, together with the consideration paid for any repurchases or redemptions
in the preceding year, is equal to 10% or more of the company’s consolidated net worth. The Federal Reserve
Board may oppose the transaction if it believes that the transaction would constitute an unsafe or unsound
practice or would violate any law or regulation. Depending upon the circumstances, the Federal Reserve Board
could take the position that paying a dividend would constitute an unsafe or unsound banking practice.

The Federal Reserve Board has broad authority to prohibit activities of bank holding companies and their
nonbanking subsidiaries which represent unsafe and unsound banking practices or which constitute violations of
laws or regulations, and can assess civil money penalties for certain activities conducted on a knowing and
reckless basis, if those activities caused a substantial loss to a depository institution. The penalties can be as high
as $1.0 million for each day the activity continues.

Anti-Tying Restrictions. Bank holding companies and their affiliates are prohibited from tying the provision

of certain services, such as extensions of credit, to other services offered by a holding company or its affiliates.

Capital Adequacy Requirements. The Federal Reserve Board has adopted a system using risk-based capital
guidelines to evaluate the capital adequacy of bank holding companies. Under the guidelines, specific categories
of assets are assigned different risk weights, based generally on the perceived credit risk of the asset. These risk
weights are multiplied by corresponding asset balances to determine a “risk-weighted” asset base. The guidelines
require a minimum ratio of total capital to total tangible risk-weighted assets of 8.0% (of which at least 4.0% is
required to consist of Tier 1 capital elements). Total capital is the sum of Tier 1 and Tier 2 capital. As of
December 31, 2006, the Company’s ratio of Tier 1 capital to total tangible risk-weighted assets was 13.52% and
its ratio of total capital to total tangible risk-weighted assets was 14.55%. Tangible risk-weighted assets are
calculated as total risk-weighted assets less intangible assets such as goodwill and core deposit intangibles.

In addition to the risk-based capital guidelines, the Federal Reserve Board uses a leverage ratio as an
additional tool to evaluate the capital adequacy of bank holding companies. The leverage ratio is a company’s
Tier 1 capital divided by its average total tangible consolidated assets. Certain highly rated bank holding
companies may maintain a minimum leverage ratio of 3.0%, but other bank holding companies are required to
maintain a leverage ratio of 4.0%. As of December 31, 2006, the Company’s leverage ratio was 7.76%.

The federal banking agencies’ risk-based and leverage ratios are minimum supervisory ratios generally
applicable to banking organizations that meet certain specified criteria, assuming that they have the highest
regulatory rating. Banking organizations not meeting these criteria are expected to operate with capital positions
well above the minimum ratios. The federal bank regulatory agencies may set capital requirements for a
particular banking organization that are higher than the minimum ratios when circumstances warrant. Federal
Reserve Board guidelines also provide that banking organizations experiencing internal growth or making
acquisitions will be expected to maintain strong capital positions substantially above the minimum supervisory
levels, without significant reliance on intangible assets.

Imposition of Liability for Undercapitalized Subsidiaries. Bank regulators are required to take “prompt
corrective action” to resolve problems associated with insured depository institutions whose capital declines
below certain levels. In the event an institution becomes “undercapitalized,” it must submit a capital restoration
plan. The capital restoration plan will not be accepted by the regulators unless each company having control of
the undercapitalized institution guarantees the subsidiary’s compliance with the capital restoration plan up to a
certain specified amount. Any such guarantee from a depository institution’s holding company is entitled to a
priority of payment in bankruptcy.

The aggregate liability of the holding company of an undercapitalized bank is limited to the lesser of 5% of
the institution’s assets at the time it became undercapitalized or the amount necessary to cause the institution to
be “adequately capitalized.” The bank regulators have greater power in situations where an institution becomes

9

“significantly” or “critically” undercapitalized or fails to submit a capital restoration plan. For example, a bank
holding company controlling such an institution can be required to obtain prior Federal Reserve Board approval
of proposed dividends, or might be required to consent to a consolidation or to divest the troubled institution or
other affiliates.

Acquisitions by Bank Holding Companies. The BHCA requires every bank holding company to obtain the
prior approval of the Federal Reserve Board before it may acquire all or substantially all of the assets of any
bank, or ownership or control of any voting shares of any bank, if after such acquisition it would own or control,
directly or indirectly, more than 5% of the voting shares of such bank. In approving bank acquisitions by bank
holding companies, the Federal Reserve Board is required to consider the financial and managerial resources and
future prospects of the bank holding company and the banks concerned, the convenience and needs of the
communities to be served, and various competitive factors.

Control Acquisitions. The Change in Bank Control Act prohibits a person or group of persons from
acquiring “control” of a bank holding company unless the Federal Reserve Board has been notified and has not
objected to the transaction. Under a rebuttable presumption established by the Federal Reserve Board, the
acquisition of 10% or more of a class of voting stock of a bank holding company with a class of securities
registered under Section 12 of the Exchange Act, such as the Company, would, under the circumstances set forth
in the presumption, constitute acquisition of control of the Company.

In addition, any entity is required to obtain the approval of the Federal Reserve Board under the BHCA
before acquiring 25% (5% in the case of an acquirer that is a bank holding company) or more of the outstanding
Common Stock of the Company, or otherwise obtaining control or a “controlling influence” over the Company.

The Bank

The Bank is a Texas-chartered banking association, the deposits of which are insured by the Deposit
Insurance Fund (“DIF”) of the FDIC. The Bank is not a member of the Federal Reserve System; therefore, the
Bank is subject to supervision and regulation by the FDIC and the Texas Banking Department. Such supervision
and regulation subject the Bank to special restrictions, requirements, potential enforcement actions and periodic
examination by the FDIC and the Texas Banking Department. Because the Federal Reserve Board regulates the
bank holding company parent of the Bank, the Federal Reserve Board also has supervisory authority which
directly affects the Bank.

Equivalence to National Bank Powers. The Texas Constitution, as amended in 1986, provides that a Texas-
chartered bank has the same rights and privileges that are or may be granted to national banks domiciled in
Texas. To the extent that the Texas laws and regulations may have allowed state-chartered banks to engage in a
broader range of activities than national banks, the Federal Deposit Insurance Corporation Improvement Act of
1991 (“FDICIA”) has operated to limit this authority. FDICIA provides that no state bank or subsidiary thereof
may engage as principal in any activity not permitted for national banks, unless the institution complies with
applicable capital requirements and the FDIC determines that the activity poses no significant risk to the
insurance fund. In general, statutory restrictions on the activities of banks are aimed at protecting the safety and
soundness of depository institutions.

Financial Modernization. Under the Gramm-Leach-Bliley Act, a national bank may establish a financial
subsidiary and engage, subject to limitations on investment, in activities that are financial in nature, other than
insurance underwriting as principal, insurance company portfolio investment, real estate development, real estate
investment and annuity issuance. To do so, a bank must be well capitalized, well managed and have a CRA
rating of satisfactory or better. Subsidiary banks of a financial holding company or national banks with financial
subsidiaries must remain well capitalized and well managed in order to continue to engage in activities that are
financial in nature without regulatory actions or restrictions, which could include divestiture of the financial in
nature subsidiary or subsidiaries. In addition, a financial holding company or a bank may not acquire a company

10

that is engaged in activities that are financial in nature unless each of the subsidiary banks of the financial
holding company or the bank has a CRA rating of satisfactory of better.

Although the powers of state chartered banks are not specifically addressed in the Gramm-Leach-Bliley Act,
Texas-chartered banks such as the Bank, will have the same if not greater powers as national banks through the
parity provision contained in the Texas Constitution.

Branching. Texas law provides that a Texas-chartered bank can establish a branch anywhere in Texas
provided that the branch is approved in advance by the Texas Banking Department. The branch must also be
approved by the FDIC, which considers a number of factors, including financial history, capital adequacy,
earnings prospects, character of management, needs of the community and consistency with corporate powers.

Restrictions on Transactions with Affiliates and Insiders. Transactions between the Bank and its nonbanking
affiliates, including the Company, are subject to Section 23A of the Federal Reserve Act. In general, Section 23A
imposes limits on the amount of such transactions, and also requires certain levels of collateral for loans to
affiliated parties. It also limits the amount of advances to third parties which are collateralized by the securities or
obligations of the Company or its subsidiaries.

Affiliate transactions are also subject to Section 23B of the Federal Reserve Act which generally requires
that certain transactions between the Bank and its affiliates be on terms substantially the same, or at least as
favorable to the Bank, as those prevailing at the time for comparable transactions with or involving other
nonaffiliated persons. The Federal Reserve has also issued Regulation W which codifies prior regulations under
Sections 23A and 23B of the Federal Reserve Act and interpretive guidance with respect to affiliate transactions.

The restrictions on loans to directors, executive officers, principal shareholders and their related interests
(collectively referred to herein as “insiders”) contained in the Federal Reserve Act and Regulation O apply to all
insured institutions and their subsidiaries and holding companies. These restrictions include limits on loans to
one borrower and conditions that must be met before such a loan can be made. There is also an aggregate
limitation on all loans to insiders and their related interests. These loans cannot exceed the institution’s total
unimpaired capital and surplus, and the FDIC may determine that a lesser amount is appropriate. Insiders are
subject to enforcement actions for knowingly accepting loans in violation of applicable restrictions.

law,

Restrictions on Distribution of Subsidiary Bank Dividends and Assets. Dividends paid by the Bank have
provided a substantial part of the Company’s operating funds and for the foreseeable future it is anticipated that
dividends paid by the Bank to the Company will continue to be the Company’s principal source of operating
funds. Capital adequacy requirements serve to limit the amount of dividends that may be paid by the Bank.
Under federal
the Bank will be
the Bank cannot pay a dividend if, after paying the dividend,
“undercapitalized.” The FDIC may declare a dividend payment to be unsafe and unsound even though the Bank
would continue to meet its capital requirements after the dividend. Because the Company is a legal entity
separate and distinct from its subsidiaries, its right to participate in the distribution of assets of any subsidiary
upon the subsidiary’s liquidation or reorganization will be subject to the prior claims of the subsidiary’s
creditors. In the event of a liquidation or other resolution of an insured depository institution, the claims of
depositors and other general or subordinated creditors are entitled to a priority of payment over the claims of
holders of any obligation of the institution to its shareholders, including any depository institution holding
company (such as the Company) or any shareholder or creditor thereof.

Examinations. The FDIC periodically examines and evaluates insured banks. Based on such an evaluation,
the FDIC may revalue the assets of the institution and require that it establish specific reserves to compensate for
the difference between the FDIC-determined value and the book value of such assets. The Texas Banking
Department also conducts examinations of state banks but may accept the results of a federal examination in lieu
of conducting an independent examination. In addition, the FDIC and Texas Banking Department may elect to
conduct a joint examination.

11

Audit Reports. Insured institutions with total assets of $500 million or more must submit annual audit
reports prepared by independent auditors to federal and state regulators. In some instances, the audit report of the
institution’s holding company can be used to satisfy this requirement. Auditors must receive examination reports,
supervisory agreements and reports of enforcement actions. In addition, financial statements prepared in
accordance with generally accepted accounting principles, management’s certifications concerning responsibility
for the financial statements, internal controls and compliance with legal requirements designated by the FDIC,
and an attestation by the auditor regarding the statements of management relating to the internal controls must be
submitted. For institutions with total assets of more than $3 billion, independent auditors may be required to
review quarterly financial statements. FDICIA requires that independent audit committees be formed, consisting
of outside directors only. The committees of such institutions must include members with experience in banking
or financial management, must have access to outside counsel, and must not include representatives of large
customers.

Capital Adequacy Requirements. The FDIC has adopted regulations establishing minimum requirements for
the capital adequacy of insured institutions. The FDIC may establish higher minimum requirements if, for
example, a bank has previously received special attention or has a high susceptibility to interest rate risk.

The FDIC’s risk-based capital guidelines generally require state banks to have a minimum ratio of Tier 1
capital to total tangible risk-weighted assets of 4.0% and a ratio of total capital to total tangible risk-weighted
assets of 8.0%. The capital categories have the same definitions for the Bank as for the Company. As of
December 31, 2006, the Bank’s ratio of Tier 1 capital to total tangible risk-weighted assets was 13.28% and its
ratio of total capital to total tangible risk-weighted assets was 14.31%.

The FDIC’s leverage guidelines require state banks to maintain Tier 1 capital of no less than 4.0% of
average total tangible assets, except in the case of certain highly rated banks for which the requirement is 3.0% of
average total assets. The Texas Banking Department has issued a policy which generally requires state chartered
banks to maintain a leverage ratio (defined in accordance with federal capital guidelines) of 5.0%. As of
December 31, 2006, the Bank’s ratio of Tier 1 capital to average total assets (leverage ratio) was 7.61%.

Corrective Measures for Capital Deficiencies. The federal banking regulators are required to take “prompt
corrective action” with respect to capital-deficient institutions. Agency regulations define, for each capital
category, the levels at which institutions are “well-capitalized,” “adequately capitalized,” “under capitalized,”
“significantly under capitalized” and “critically under capitalized.” A “well-capitalized” bank has a total risk-
based capital ratio of 10.0% or higher; a Tier 1 risk-based capital ratio of 6.0% or higher; a leverage ratio of 5.0%
or higher; and is not subject to any written agreement, order or directive requiring it to maintain a specific capital
level for any capital measure. An “adequately capitalized” bank has a total risk-based capital ratio of 8.0% or
higher; a Tier 1 risk-based capital ratio of 4.0% or higher; a leverage ratio of 4.0% or higher (3.0% or higher if
the bank was rated a composite 1 in its most recent examination report and is not experiencing significant
growth); and does not meet the criteria for a well capitalized bank. A bank is “under capitalized” if it fails to
meet any one of the ratios required to be adequately capitalized. The Bank is classified as “well-capitalized” for
purposes of the FDIC’s prompt corrective action regulations.

In addition to requiring undercapitalized institutions to submit a capital restoration plan, agency regulations
contain broad restrictions on certain activities of undercapitalized institutions including asset growth,
acquisitions, branch establishment and expansion into new lines of business. With certain exceptions, an insured
depository institution is prohibited from making capital distributions, including dividends, and is prohibited from
paying management fees to control persons if the institution would be undercapitalized after any such
distribution or payment.

As an institution’s capital decreases, the FDIC’s enforcement powers become more severe. A significantly
undercapitalized institution is subject to mandated capital raising activities, restrictions on interest rates paid and
transactions with affiliates, removal of management and other restrictions. The FDIC has only very limited

12

discretion in dealing with a critically undercapitalized institution and is virtually required to appoint a receiver or
conservator.

Banks with risk-based capital and leverage ratios below the required minimums may also be subject to
certain administrative actions, including the termination of deposit insurance upon notice and hearing, or a
temporary suspension of insurance without a hearing in the event the institution has no tangible capital.

Deposit Insurance Assessments. The Bank’s deposits are insured by the FDIC through the DIF to the extent
provided by law and the Bank must pay assessments to the FDIC for such deposit insurance protection. The
FDIC has implemented a risk-based assessment system under which FDIC-insured depository institutions pay
annual premiums at rates based on their risk classification. A bank’s risk classification is based on its capital
levels and the level of supervisory concern the Bank poses to the regulators. Institutions assigned to higher risk
classifications (that is, institutions that pose a greater risk of loss to their respective deposit insurance funds) pay
assessments of higher rates than institutions that pose a lower risk. A decrease in the Bank’s capital ratios or the
occurrence of events that have an adverse effect on the Bank’s asset quality, management, earnings or liquidity
could result in a substantial increase in deposit insurance premiums paid by the Bank, which would adversely
affect the Bank’s earnings. In addition, the FDIC can impose special assessments in certain instances. The
current range of DIF assessments is between 0% and 0.27% of deposits.

The Federal Deposit Insurance Reform Act of 2005 (“Deposit Reform Act”) among other things,
consolidates the Bank Insurance Fund and Savings Association Insurance Fund into the DIF, establishes a range
for reserves levels for the DIF of 1.15% to 1.50% and creates a mechanism for raising the ceiling on deposit
insurance coverage to reflect future inflation. The FDIC has adopted final regulations with respect to the Deposit
Reform Act effective as of January 1, 2007. Under the new regulations, the FDIC will evaluate each institution’s
risk based on three primary sources of information: supervisory ratings for all insured institutions, financial ratios
for most institutions, and long-term debt issuer ratings for large institutions that have them. In connection with
the adoption of the new regulations, the FDIC set the assessment rates that took effect on January 1, 2007. The
FDIC also set the designated reserve ratio for the DIF at 1.25% of estimated insured deposits.

Brokered Deposit Restrictions. Adequately capitalized institutions cannot accept, renew or roll over
brokered deposits except with a waiver from the FDIC, and are subject to restrictions on the interest rates that can
be paid on such deposits. Undercapitalized institutions may not accept, renew, or roll over brokered deposits.

Cross-Guarantee Provisions. The Financial Institutions Reform, Recovery and Enforcement Act of 1989
(“FIRREA”) contains a “cross-guarantee” provision which generally makes commonly controlled insured
depository institutions liable to the FDIC for any losses incurred in connection with the failure of a commonly
controlled depository institution.

Community Reinvestment Act. The Community Reinvestment Act (“CRA”) and the regulations issued
thereunder are intended to encourage banks to help meet the credit needs of their service area, including low and
moderate income neighborhoods, consistent with the safe and sound operations of the banks. These regulations
also provide for regulatory assessment of a bank’s record in meeting the needs of its service area when
considering applications to establish branches, merger applications and applications to acquire the assets and
assume the liabilities of another bank. FIRREA requires federal banking agencies to make public a rating of a
bank’s performance under the CRA. In the case of a bank holding company, the CRA performance record of the
banks involved in the transaction are reviewed in connection with the filing of an application to acquire
ownership or control of shares or assets of a bank or to merge with any other bank holding company. An
unsatisfactory record can substantially delay or block the transaction.

Consumer Laws and Regulations. In addition to the laws and regulations discussed herein, the Bank is also
subject to certain consumer laws and regulations that are designed to protect consumers in transactions with

13

banks. While the list set forth herein is not exhaustive, these laws and regulations include the Truth in Lending
Act, the Truth in Savings Act, the Electronic Funds Transfer Act, the Expedited Funds Availability Act, the
Equal Credit Opportunity Act, and the Fair Housing Act, among others. These laws and regulations mandate
certain disclosure requirements and regulate the manner in which financial institutions must deal with customers
when taking deposits or making loans to such customers. The Bank must comply with the applicable provisions
of these consumer protection laws and regulations as part of their ongoing customer relations.

The USA PATRIOT Act of 2001. The Uniting and Strengthening America by Providing Appropriate Tools
Required to Intercept and Obstruct Terrorism Act of 2001 (“USA PATRIOT Act”) was enacted in October 2001.
The USA PATRIOT Act is intended to strengthen U.S. law enforcement’s and the intelligence communities’
ability to work cohesively to combat terrorism on a variety of fronts. The potential impact of the USA PATRIOT
Act on financial institutions of all kinds is significant and wide ranging. The USA PATRIOT Act contains
sweeping anti-money laundering and financial transparency laws and requires various regulations, including:
(i) due diligence requirements for financial institutions that administer, maintain, or manage private bank
accounts or correspondent accounts for non-U.S. persons; (ii) standards for verifying customer identification at
account opening; (iii) rules to promote cooperation among financial institutions, regulators and law enforcement
entities in identifying parties that may be involved in terrorism or money laundering; (iv) reports by nonfinancial
trades and business filed with the Treasury Department’s Financial Crimes Enforcement Network for
transactions exceeding $10,000; and (v) filing of suspicious activities reports involving securities by brokers and
dealers if they believe a customer may be violating U.S. laws and regulations.

Privacy. In addition to expanding the activities in which banks and bank holding companies may engage,
the Gramm-Leach-Bliley Act also imposed new requirements on financial institutions with respect to customer
privacy. The Gramm-Leach-Bliley Act generally prohibits disclosure of customer information to non-affiliated
third parties unless the customer has been given the opportunity to object and has not objected to such disclosure.
Financial institutions are further required to disclose their privacy policies to customers annually. Financial
institutions, however, will be required to comply with state law if it is more protective of customer privacy than
the Gramm-Leach-Bliley Act.

Legislative Initiatives

From time to time, various legislative and regulatory initiatives are introduced in Congress and State
Legislatures. Such initiatives may change banking statutes and the operating environment of the Company and its
banking subsidiaries in substantial and unpredictable ways. The Company cannot determine the ultimate effect
that any potential legislation, if enacted, or implementing regulations with respect thereto, would have, upon the
financial condition or results of operations of the Company or its subsidiaries. A change in statutes, regulations
or regulatory policies applicable to the Company or any of its subsidiaries could have a material effect on the
financial condition, results of operations or business of the Company and its subsidiaries.

Enforcement Powers of Federal and State Banking Agencies

The federal banking agencies have broad enforcement powers, including the power to terminate deposit
insurance, impose substantial fines and other civil and criminal penalties, and appoint a conservator or receiver.
Failure to comply with applicable laws, regulations, and supervisory agreements could subject the Company or
the Bank and their subsidiaries, as well as officers, directors, and other institution-affiliated parties of these
organizations, to administrative sanctions and potentially substantial civil money penalties. In addition to the
grounds discussed above under “—The Bank—Corrective Measures for Capital Deficiencies,” the appropriate
federal banking agency may appoint the FDIC as conservator or receiver for a banking institution (or the FDIC
may appoint itself, under certain circumstances) if any one or more of a number of circumstances exist,
including, without limitation, the fact that the banking institution is undercapitalized and has no reasonable
prospect of becoming adequately capitalized; fails to become adequately capitalized when required to do so; fails
to submit a timely and acceptable capital restoration plan; or materially fails to implement an accepted capital

14

restoration plan. The Texas Department of Banking also has broad enforcement powers over the Bank, including
the power to impose orders, remove officers and directors,
impose fines and appoint supervisors and
conservators.

Effect on Economic Environment

The policies of regulatory authorities, including the monetary policy of the Federal Reserve Board, have a
significant effect on the operating results of bank holding companies and their subsidiaries. Among the means
available to the Federal Reserve Board to affect
the money supply are open market operations in U.S.
government securities, changes in the discount rate on member bank borrowings, and changes in reserve
requirements against member bank deposits. These means are used in varying combinations to influence overall
growth and distribution of bank loans, investments and deposits, and their use may affect interest rates charged
on loans or paid for deposits.

Federal Reserve Board monetary policies have materially affected the operating results of commercial banks
in the past and are expected to continue to do so in the future. The nature of future monetary policies and the
effect of such policies on the business and earnings of the Company and its subsidiaries cannot be predicted.

ITEM 1A. RISK FACTORS

An investment in the Company’s Common Stock involves risks. The following is a description of the
material risks and uncertainties that the Company believes affect its business and an investment in the Common
Stock. Additional risks and uncertainties that the Company is unaware of, or that it currently deems immaterial,
also may become important factors that affect the Company and its business. If any of the risks described in this
annual report on Form 10-K were to occur, the Company’s financial condition and results of operations could be
materially and adversely affected. If this were to happen, the value of the Common Stock could decline
significantly and you could lose all or part of your investment.

Risks Associated with the Company’s Business

If the Company is not able to continue its historical levels of growth, it may not be able to maintain its
historical earnings trends.

To achieve its past levels of growth, the Company has initiated internal growth programs and completed a
number of acquisitions. The Company may not be able to sustain its historical rate of growth or may not be able
to grow at all. In addition, the Company may not be able to obtain the financing necessary to fund additional
growth and may not be able to find suitable candidates for acquisition. Various factors, such as economic
conditions and competition, may impede or prohibit the opening of new banking centers. Further, the Company
may be unable to attract and retain experienced bankers, which could adversely affect its internal growth. If the
Company is not able to continue its historical levels of growth, it may not be able to maintain its historical
earnings trends.

If the Company is unable to manage its growth effectively, its operations could be negatively affected.

Companies that experience rapid growth face various risks and difficulties, including:

•

•

•

finding suitable markets for expansion;

finding suitable candidates for acquisition;

attracting funding to support additional growth;

• maintaining asset quality;

•

attracting and retaining qualified management; and

• maintaining adequate regulatory capital.

15

In addition, in order to manage its growth and maintain adequate information and reporting systems within
its organization, the Company must identify, hire and retain additional qualified employees, particularly in the
accounting and operational areas of its business.

If the Company does not manage its growth effectively,

its business, financial condition, results of
operations and future prospects could be negatively affected, and the Company may not be able to continue to
implement its business strategy and successfully conduct its operations.

If the Company is unable to identify and acquire other financial institutions and successfully integrate its
acquired businesses, its business and earnings may be negatively affected.

The market for acquisitions remains highly competitive, and the Company may be unable to find acquisition
candidates in the future that fit its acquisition and growth strategy. To the extent that the Company is unable to
find suitable acquisition candidates, an important component of its growth strategy may be lost.

Acquisitions of financial institutions involve operational risks and uncertainties and acquired companies
may have unforeseen liabilities, exposure to asset quality problems, key employee and customer retention
problems and other problems that could negatively affect the Company’s organization. The Company may not be
able to complete future acquisitions and, if completed, the Company may not be able to successfully integrate the
operations, management, products and services of the entities that it acquires and eliminate redundancies. The
integration process could result in the loss of key employees or disruption of the combined entity’s ongoing
business or inconsistencies in standards, controls, procedures and policies that adversely affect the Company’s
ability to maintain relationships with customers and employees or achieve the anticipated benefits of the
transaction. The integration process may also require significant
time and attention from the Company’s
management that they would otherwise direct at servicing existing business and developing new business. The
Company’s failure to successfully integrate the entities it acquires into its existing operations may increase its
operating costs significantly and adversely affect its business and earnings.

The Company’s business is subject to interest rate risk and fluctuations in interest rates may adversely affect
its earnings and capital levels.

The majority of the Company’s assets are monetary in nature and, as a result, the Company is subject to
significant risk from changes in interest rates. Changes in interest rates can impact the Company’s net interest
income as well as the valuation of its assets and liabilities. The Company’s earnings and cash flows are
significantly dependent on its net interest income. Net interest income is the difference between the interest
income earned on loans, investment securities and other interest-earning assets and the interest expense paid on
deposits, borrowings and other interest-bearing liabilities. Therefore, any change in general market interest rates,
such as a change in the monetary policy of the Federal Reserve Board or otherwise, can have a significant effect
on the Company’s net interest income. The Company’s assets and liabilities may react differently to changes in
overall market rates or conditions because there may be mismatches between the repricing or maturity
characteristics of the assets and liabilities.

The Company’s profitability depends significantly on local economic conditions.

The Company’s success depends primarily on the general economic conditions of the geographic markets in
which it operates. Unlike larger banks that are more geographically diversified, the Company provides banking
and financial services to customers primarily in the central, north central, south central and southeast areas of
Texas. The local economic conditions in these areas have a significant impact on the Company’s commercial,
real estate and construction loans, the ability of its borrowers to repay their loans and the value of the collateral
securing these loans. A significant decline in general economic conditions, caused by inflation, recession, acts of
terrorism, outbreak of hostilities or other international or domestic calamities, unemployment or other factors
could impact these local economic conditions and negatively affect the Company’s financial results.

16

The Company’s allowance for credit losses may not be sufficient to cover actual credit losses, which could
adversely affect its earnings.

As a lender, the Company is exposed to the risk that its loan customers may not repay their loans according
to the terms of these loans and the collateral securing the payment of these loans may be insufficient to fully
compensate the Company for the outstanding balance of the loan plus the costs to dispose of the collateral. The
Company may experience significant loan losses which could have a material adverse effect on its operating
results and financial condition. Management makes various assumptions and judgments about the collectibility of
the Company’s loan portfolio, including the diversification by industry of its commercial loan portfolio, the
amount of nonperforming loans and related collateral, the volume, growth and composition of its loan portfolio,
the effects on the loan portfolio of current economic indicators and their probable impact on borrowers and the
evaluation of its loan portfolio through its internal loan review process and other relevant factors.

The Company maintains an allowance for credit losses in an attempt to cover credit losses inherent in its
loan portfolio. Additional credit losses will likely occur in the future and may occur at a rate greater than the
Company has experienced to date. In determining the size of the allowance, the Company relies on an analysis of
its loan portfolio,
its experience and its evaluation of general economic conditions. If the Company’s
assumptions prove to be incorrect, its current allowance may not be sufficient and adjustments may be necessary
to allow for different economic conditions or adverse developments in its loan portfolio. Material additions to the
allowance would materially decrease net income.

In addition, federal and state regulators periodically review the Company’s allowance for credit losses and
may require the Company to increase its provision for credit losses or recognize further charge-offs, based on
judgments different than those of the Company’s management. Any increase in the Company’s allowance for
credit losses or charge-offs as required by these regulatory agencies could have a material adverse effect on the
Company’s operating results and financial condition.

The Company’s small to medium-sized business target market may have fewer financial resources to weather
a downturn in the economy.

The Company targets its business development and marketing strategy primarily to serve the banking and
financial services needs of small to medium-sized businesses. These small to medium-sized businesses generally
have fewer financial resources in terms of capital or borrowing capacity than larger entities. If general economic
conditions negatively impact the southeast Texas area or the other markets in which the Company operates, the
Company’s results of operations and financial condition may be negatively affected.

An interruption in or breach in security of the Company’s information systems may result in a loss of
customer business.

The Company relies heavily on communications and information systems to conduct its business. Any
failure, interruption or breach in security of these systems could result in failures or disruptions in the Company’s
customer relationship management, general ledger, deposits, servicing or loan origination systems. Although the
Company has policies and procedures designed to prevent or minimize the effect of a failure, interruption or
breach in security of its communications or information systems, there can be no assurance that any such failures,
interruptions or security breaches will not occur, or if they do occur, that they will be adequately addressed by
the Company. The occurrence of any such failures, interruptions or security breaches could result in a loss of
customer business and have a negative effect on the Company’s results of operations and financial condition.

The business of the Company is dependent on technology and the Company’s inability to invest in
technological improvements may adversely affect its results of operations and financial condition.

The financial services industry is undergoing rapid technological changes with frequent introductions of
new technology driven products and services. In addition to better serving customers, the effective use of
technology increases efficiency and enables financial institutions to reduce costs. The Company’s future success

17

depends in part upon its ability to address the needs of its customers by using technology to provide products and
services that will satisfy customer demands for convenience as well as create additional efficiencies in its
operations. Many of the Company’s competitors have substantially greater resources to invest in technological
improvements. The Company may not be able to effectively implement new technology driven products and
services or be successful in marketing these products and services to its customers, which may negatively affect
the Company’s results of operations and financial condition.

The Company operates in a highly regulated environment and, as a result, is subject to extensive regulation
and supervision that could adversely affect its financial performance, and the Company may be adversely
affected by changes in federal, state and local laws and regulations.

The Company is subject to extensive regulation, supervision and examination by federal and state banking
authorities. Any change in applicable regulations or federal or state legislation could have a substantial impact on
the Company, its subsidiary bank, and their respective operations. Additional legislation and regulations may be
enacted or adopted in the future that could significantly affect the Company’s powers, authority and operations,
or the powers, authority and operations of the Bank, which could have a material adverse effect on the
Company’s financial condition and results of operations. Further, regulators have significant discretion and
power to prevent or remedy unsafe or unsound practices or violations of laws by banks and bank holding
companies in the performance of their supervisory and enforcement duties. The exercise of this regulatory
discretion and power may have a negative impact on the Company.

Risks Associated with the Company’s Common Stock

The Company’s corporate organizational documents and the provisions of Texas law to which it is subject
may delay or prevent a change in control of the Company that you may favor.

The Company’s amended and restated articles of incorporation and amended and restated bylaws contain
various provisions which may delay, discourage or prevent an attempted acquisition or change of control of the
Company. These provisions include:

•

•

•

•

a board of directors classified into three classes of directors with the directors, of each class having
staggered, three year terms;

a provision that any special meeting of the Company’s shareholders may be called only by the chairman
of the board and chief executive officer, the president, a majority of the board of directors or the holders
of at least 50% of the Company’s shares entitled to vote at the meeting;

a provision establishing certain advance notice procedures for nomination of candidates for election as
directors and for shareholder proposals to be considered at an annual or special meeting of shareholders;
and

a provision that denies shareholders the right to amend the Company’s bylaws.

The Company’s articles of incorporation provide for noncumulative voting for directors and authorize the
board of directors to issue shares of its preferred stock without shareholder approval and upon such terms as the
board of directors may determine. The issuance of the Company’s preferred stock could have the effect of
making it more difficult for a third party to acquire, or of discouraging a third party from acquiring, a controlling
interest in the Company. In addition, certain provisions of Texas law, including a provision which restricts
certain business combinations between a Texas corporation and certain affiliated shareholders, may delay,
discourage or prevent an attempted acquisition or change in control of the Company.

18

The holders of the Company’s junior subordinated debentures have rights that are senior to those of the
Company’s shareholders.

As of December 31, 2006, the Company had $100.5 million in junior subordinated debentures outstanding
that were issued to the Company’s subsidiary trusts. The subsidiary trusts purchased the junior subordinated
debentures from the Company using the proceeds from the sale of trust preferred securities to third party
investors. Payments of the principal and interest on the trust preferred securities are conditionally guaranteed by
the Company to the extent not paid or made by each trust, provided the trust has funds available for such
obligations.

The junior subordinated debentures are senior to the Company’s shares of Common Stock. As a result, the
Company must make payments on the junior subordinated debentures (and the related trust preferred securities)
before any dividends can be paid on its Common Stock and, in the event of the Company’s bankruptcy,
dissolution or liquidation, the holders of the debentures must be satisfied before any distributions can be made to
the holders of the Common Stock. The Company has the right to defer distributions on the junior subordinated
debentures (and the related trust preferred securities) for up to five years, during which time no dividends may be
paid to holders of the Company’s Common Stock.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

19

ITEM 2. PROPERTIES

As of December 31, 2006, the Company conducted business at 88 full-service banking centers. The
Company’s headquarters are located at Prosperity Bank Plaza, 4295 San Felipe, in the Galleria area in Houston,
Texas. The Company owns all of the buildings in which its banking centers are located other than those listed
below. The expiration dates of the leases for the banking centers listed below do not include renewal periods at
the Company’s option which may be available.

Banking Center

Houston CMSA(1):

Expiration Date of Lease

October 2007
January 2009
October 2012

Bellaire . . . . . . . . . . . . . . . . . . .
City West
. . . . . . . . . . . . . . . . .
Downtown . . . . . . . . . . . . . . . . .
Fairfield . . . . . . . . . . . . . . . . . . . May 2008
Galveston . . . . . . . . . . . . . . . . .
Gladebrook . . . . . . . . . . . . . . . .
Heights . . . . . . . . . . . . . . . . . . .
Holcombe . . . . . . . . . . . . . . . . .
Medical Center . . . . . . . . . . . . . March 2010
Post Oak . . . . . . . . . . . . . . . . . .
Pecan Grove . . . . . . . . . . . . . . .
River Oaks . . . . . . . . . . . . . . . .
Southwest Medical . . . . . . . . . .
Waugh Drive . . . . . . . . . . . . . . .
Westheimer . . . . . . . . . . . . . . . . May 2011

June 2007
October 2015
December 2009
October 2010
February 2011

November 2010
October 2010
January 2008
July 2009

South Texas Area:

Gonzales . . . . . . . . . . . . . . . . . .

November 2007

Dallas, Texas Area:

Abrams Centre . . . . . . . . . . . . .
Preston Road . . . . . . . . . . . . . . .

December 2008
September 2013

Corpus Christi, Texas Area:

Airline . . . . . . . . . . . . . . . . . . . .
August 2008
Aransas Pass . . . . . . . . . . . . . . . March 2011
January 2009
Carmel . . . . . . . . . . . . . . . . . . . .
February 2009
Port Aransas . . . . . . . . . . . . . . .
November 2015
Waterstreet
. . . . . . . . . . . . . . . .
April 2007
Woodlawn . . . . . . . . . . . . . . . . .

Austin, Texas Area:

Congress . . . . . . . . . . . . . . . . . .
Congress Drive-thru . . . . . . . . .
Oak Hill . . . . . . . . . . . . . . . . . . . May 2010

August 2014
* (2)

East Texas Area:
None

(1) The Houston CMSA includes Austin, Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty,

Montgomery, San Jacinto and Waller counties.

(2) Month to month lease.

20

The following table sets forth specific information regarding the banking centers located in each of the

Company’s geographical market areas at December 31, 2006:

Geographical Area

Number of Banking Centers

Deposits at December 31, 2006

Houston CMSA . . . . . . . . . . . . . . . . . . . . . . . .
South Texas area . . . . . . . . . . . . . . . . . . . . . . .
Dallas, Texas area . . . . . . . . . . . . . . . . . . . . . .
Corpus Christi, Texas area . . . . . . . . . . . . . . .
Austin, Texas area . . . . . . . . . . . . . . . . . . . . . .
East Texas area . . . . . . . . . . . . . . . . . . . . . . . .

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38
17
11
15
5
2

88

(Dollars in thousands)
$1,834,757
932,024
372,602
329,967
210,615
45,713

$3,725,678

ITEM 3. LEGAL PROCEEDINGS

Neither the Company nor the Bank is currently a party to any material legal proceeding.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

A special meeting of the Company’s shareholders was held on December 13, 2006. The record date for the
special meeting was October 27, 2006, at which date the Company had 32,791,785 shares of common stock
outstanding. At the special meeting, the shareholders of the Company considered and acted on a proposal to
approve the Agreement and Plan of Reorganization, dated as of July 18, 2006, as amended, by and between the
Company and Texas United Bancshares, Inc. pursuant to which Texas United will merge with and into the
Company, all on and subject to the terms and conditions contained therein. A total of 24,014,255 shares voted in
favor of the proposal, 2,478 shares voted against the proposal and 387,482 shares abstained.

PART II.

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED SHAREHOLDER

MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Common Stock Market Prices

The Company’s Common is listed on the Nasdaq Global Select Market under the symbol “PRSP.” As of
February 28, 2007, there were 43,667,909 shares outstanding and 2,303 shareholders of record. The number of
beneficial owners is unknown to the Company at this time.

The following table presents the high and low intra-day sales prices for the Common Stock as reported by

Nasdaq during the two years ended December 31, 2006:

2006

High

Low

Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First Quarter

$35.38
36.16
33.90
30.54

$32.54
31.64
29.65
28.50

2005

Fourth Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second Quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First Quarter

High

Low

$32.12
31.45
28.97
29.32

$27.97
28.14
25.05
25.50

21

Dividends

Holders of Common Stock are entitled to receive dividends when, as and if declared by the Company’s
Board of Directors out of funds legally available therefor. While the Company has declared dividends on its
Common Stock since 1994, and paid quarterly dividends aggregating $0.4125 per share in 2006 and $0.3475 per
share in 2005, there is no assurance that the Company will continue to pay dividends in the future. Future
dividends on the Common Stock will depend upon the Company’s earnings and financial condition, liquidity and
capital requirements, the general economic and regulatory climate, the Company’s ability to service any equity or
debt obligations senior to the Common Stock and other factors deemed relevant by the board of directors of the
Company.

As a holding company, the Company is ultimately dependent upon its subsidiaries to provide funding for its
operating expenses, debt service and dividends. Various banking laws applicable to the Bank limit the payment
of dividends and other distributions by the Bank to the Company, and may therefore limit the Company’s ability
to pay dividends on its Common Stock. If required payments on the Company’s outstanding junior subordinated
debentures held by its unconsolidated subsidiary trusts are not made or suspended, the Company will be
prohibited from paying dividends on its Common Stock. Regulatory authorities could impose administratively
stricter limitations on the ability of the Bank to pay dividends to the Company if such limits were deemed
appropriate to preserve certain capital adequacy requirements.

The cash dividends declared per share by quarter (and paid on the first business day of the subsequent

quarter) for the Company’s last two fiscal years were as follows:

Fourth quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Third quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Second quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
First quarter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$0.1125
0.1000
0.1000
0.1000

$0.1000
0.0825
0.0825
0.0825

2006

2005

Recent Sales of Unregistered Securities

None.

22

Securities Authorized for Issuance under Equity Compensation Plans

As of December 31, 2006, the Company had outstanding stock options granted under three stock option
plans, all of which were approved by the Company’s shareholders. As of such date, the Company also had
outstanding stock options granted under stock option plans that it assumed in connection with various acquisition
transactions. The following table provides information as of December 31, 2006 regarding the Company’s equity
compensation plans under which the Company’s equity securities are authorized for issuance:

Plan category

Number of securities to
be issued upon exercise
of outstanding options,
warrants and rights
(a)

Weighted-average
exercise price of
outstanding options
(b)

Number of securities
remaining available for
future issuance under
equity compensation
plans (excluding
securities reflected in
column (a))
(c)

Equity compensation plans approved by security
holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equity compensation plans not approved by

1,142,084(1)

security holders . . . . . . . . . . . . . . . . . . . . . . . . .

—

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,142,084

$21.68

—

$21.68

1,206,483

—

1,206,483

(1)

Includes (a) 4,240 shares which may be issued upon exercise of options outstanding assumed by the
Company in connection with the acquisition of Paradigm Bancorporation, Inc. at a weighted average
exercise price of $11.50, (b) 31,127 shares which may be issued upon exercise of options outstanding
assumed by the Company in connection with the acquisition of MainBancorp, Inc. at a weighted average
exercise price of $16.26, (c) 136,645 shares which may be issued upon exercise of options outstanding
assumed by the Company in connection with the acquisition of First Capital Bankers, Inc. at a weighted
average exercise price of $18.47 and (d) 75,172 shares which may be issued upon exercise of options
outstanding assumed by the Company in connection with the acquisition of SNB Bancshares, Inc. at a
weighted average exercise price of $8.12.

Issuer Purchases of Equity Securities

None.

23

Performance Graph

The following Performance Graph compares the cumulative total shareholder return on the Company’s
Common Stock for the period beginning at the close of trading on December 31, 2001 to December 31, 2006,
with the cumulative total return of the S&P 500 Total Return Index and the Nasdaq Bank Index for the same
period. Dividend reinvestment has been assumed. The Performance Graph assumes $100 invested on
December 31, 2001 in the Company’s Common Stock, the S&P 500 Total Return Index and the Nasdaq Bank
Index. The historical stock price performance for the Company’s Common Stock shown on the graph below is
not necessarily indicative of future stock performance.

Composite of Cumulative Total Return
Prosperity Bancshares, Inc., the S&P 500 Total Return Index
and the Nasdaq Bank Index

Prosperity Bancshares, Inc.

Total Return Performance

PROSPERITY BANCSHARES, INC.

S & P 500

NASDAQ BANK

D
O
L
L
A
R
S

400

350

300

250

200

150

100

50

0

12/31/01

12/31/02

12/31/03

12/31/04

12/31/05

12/31/06

Prosperity Bancshares, Inc.
S & P 500
NASDAQ Bank

Year Ending

12/31/01

12/31/02

12/31/03

12/31/04

12/31/05

12/31/06

$100.00
100.00
100.00

$142.64
77.90
59.14

$172.11
100.24
89.11

$224.73
111.15
103.85

$223.82
116.61
130.57

$272.17
135.03
166.05

Copyright© 2007, Standard & Poor’s, a division of The McGraw-Hill Companies, Inc. All rights reserved.
www.researchdatagroup.com/S&P.htm

24

ITEM 6. SELECTED CONSOLIDATED FINANCIAL DATA

The following selected consolidated financial data for, and as of the end of, each of the years in the five-year
period ended December 31, 2006 are derived from and should be read in conjunction with the Company’s
consolidated financial statements and the notes thereto. All per share data for 2002 has been restated to give
effect to the two-for-one stock split effective May 31, 2002.

As of and for the Years Ended December 31,

2006(1)

2005

2004

2003

2002

(Dollars in thousands, except per share data)

Income Statement Data:
Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 231,739
93,594
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net interest income . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for credit losses . . . . . . . . . . . . . . . . . . . . . . . . .

138,145
504

Net interest income after provision for credit

losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noninterest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noninterest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income before taxes . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for income taxes . . . . . . . . . . . . . . . . . . . . . . . . .

137,641
33,982
77,669

93,954
32,229

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $

61,725

Per Share Data(2):
Basic earnings per share . . . . . . . . . . . . . . . . . . . . . . . . . . . $
Diluted earnings per share . . . . . . . . . . . . . . . . . . . . . . . . .
Book value per share . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash dividends declared.
. . . . . . . . . . . . . . . . . . . . . . . . . .
Dividend payout ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weighted average shares outstanding (basic) (in

1.96
1.94
20.26
0.41
21.10%

$ 162,123 $ 111,756 $

51,226

110,897
480

110,417
30,021
68,957

71,481
23,621

29,789

81,967
880

81,087
23,071
51,707

52,451
17,744

90,845 $
26,346

64,499
483

64,016
16,966
42,021

38,961
12,413

80,742
28,101

52,641
1,010

51,631
11,594
32,349

30,876
9,555

$

$

47,860 $

34,707 $

26,548 $

21,321

1.79 $
1.77
16.69
0.35
20.11%

1.61 $
1.59
12.32
0.31
19.22%

1.38 $
1.36
10.49
0.25
18.29%

1.25
1.22
8.19
0.22
18.13%

thousands).

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

31,491

26,706

21,534

19,225

17,122

Weighted average shares outstanding (diluted) (in

thousands).

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shares outstanding at end of period (in thousands). . . . . . .

31,893
32,793

27,024
27,821

21,804
22,381

19,536
20,930

17,442
18,896

Balance Sheet Data (at period end):
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $4,586,769
1,590,303
Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2,176,507
Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23,990
Allowance for credit losses . . . . . . . . . . . . . . . . . . . . . . . .
447,371
Total goodwill and intangibles . . . . . . . . . . . . . . . . . . . . . .
3,725,678
Total deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
73,633
Borrowings and notes payable. . . . . . . . . . . . . . . . . . . . . . .
664,411
Total shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . .
100,519(3)
Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . .

Average Balance Sheet Data:
Total assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $4,283,795
1,612,221
Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2,037,379
Loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22,476
Allowance for credit losses . . . . . . . . . . . . . . . . . . . . . . . .
406,920
Total goodwill and intangibles . . . . . . . . . . . . . . . . . . . . . .
3,449,100
Total deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
602,712
Total shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . .
92,271
Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . .

$3,585,982 $2,697,228 $2,400,487 $1,823,286
950,317
1,572,602
679,559
1,542,125
9,580
17,203
284,425
72,410
1,586,611
2,920,318
37,939
102,389
154,739
464,717
34,030
75,775

1,376,880
770,053
10,345
124,755
2,083,748
30,936
219,588
59,804

1,302,792
1,035,513
13,105
164,672
2,317,076
38,174
275,647
47,424

$3,361,617 $2,543,088 $2,006,869 $1,470,758
818,362
1,471,067
524,885
1,435,376
7,350
16,334
253,703
38,531
1,300,884
2,791,813
114,234
413,864
29,648
69,869

1,108,153
697,235
9,525
81,485
1,749,045
170,167
39,400

1,383,790
871,736
11,454
139,405
2,189,695
243,274
59,288

(Table continued on next page)

25

Performance Ratios:
Return on average assets . . . . . . . . . . . . . . . . . . . . . . . . . .
Return on average equity . . . . . . . . . . . . . . . . . . . . . . . . .
Net interest margin (tax equivalent) . . . . . . . . . . . . . . . . .
Efficiency ratio(4)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Asset Quality Ratios(5):
Nonperforming assets to total loans and other real

As of and for the Years Ended December 31,

2006(1)

2005

2004

2003

2002

(Dollars in thousands, except per share data)

1.44%
10.24
3.80
45.29

1.42%
11.56
3.81
48.93

1.36%
14.27
3.63
49.45

1.32%
15.60
3.64
51.82

1.45%
18.66
4.00
50.39

estate.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net charge-offs to average loans . . . . . . . . . . . . . . . . . . .
Allowance for credit losses to total loans.
. . . . . . . . . . . .
Allowance for credit losses to nonperforming loans(6) . . .

0.05%
0.04
1.10
2,530.6

0.09%
0.03
1.12
1,505.1

Capital Ratios(5):
Leverage ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Average shareholders’ equity to average total assets . . . .
. . . . . . . . . . . . . . . . . . . . .
Tier 1 risk-based capital ratio.
Total risk-based capital ratio . . . . . . . . . . . . . . . . . . . . . . .

7.76%

7.83%

14.07
13.52
14.55

12.31
15.34
16.37

0.17%
0.06
1.27
949.6

6.30%
9.57
13.56
14.67

0.13%
0.23
1. 34
1,519.1

0.38%
0.08
1.41
408.53

7.10%
8.48
15.82
16.90

6.56%
7.77
14.10
15.30

(1) The Company completed the acquisition of SNB Bancshares, Inc. on April 1, 2006.
(2) Adjusted for a two-for-one stock split effective May 31, 2002.
(3) Consists of $15.5 million of junior subordinated debentures of Prosperity Statutory Trust II due July 31, 2031, $12.9
million of junior subordinated debentures of Prosperity Statutory Trust III due September 17, 2033, $12.9 million of
junior subordinated debentures of Prosperity Statutory Trust IV due December 30, 2033, $20.6 million of junior
subordinated debentures of First Capital Statutory Trust I due March 26, 2032 (assumed by the Company on March 1,
2005), $7.7 million of junior subordinated debentures of First Capital Statutory Trust II due September 26, 2032
(assumed by the Company on March 1, 2005), $10.3 million of junior subordinated debentures of SNB Statutory Trust II
due March 26, 2033 (assumed by the Company on April 1, 2006), $10.3 million of junior subordinated debentures of
SNB Capital Trust III due March 27, 2033 (assumed by the Company on April 1, 2006) and $10.3 million of junior
subordinated debentures of SNB Capital Trust IV due September 25, 2033 (assumed by the Company on April 1, 2006).

(4) Calculated by dividing total noninterest expense, excluding credit loss provisions, by net interest income plus noninterest
income, excluding net gains and losses on the sale of securities and on the sale of assets. Additionally, taxes are not part
of this calculation.

(5) At period end, except for net charge-offs to average loans and average shareholders’ equity to average total assets, which

is for periods ended at such dates.

(6) Nonperforming loans consist of nonaccrual loans, loans contractually past due 90 days or more, restructured loans and

any other loan management deems to be nonperforming.

26

ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND

RESULTS OF OPERATIONS

Special Cautionary Notice Regarding Forward-Looking Statements

Statements and financial discussion and analysis contained in this annual report on Form 10-K that are not
statements of historical fact constitute forward-looking statements made pursuant to the safe harbor provisions of
the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on
assumptions and involve a number of risks and uncertainties, many of which are beyond the Company’s control.
Many possible events or factors could affect the future financial results and performance of the Company and
could cause such results or performance to differ materially from those expressed in the forward-looking
statements. These possible events or factors include, but are not limited to:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

changes in interest rates and market prices, which could reduce the Company’s net interest margins,
asset valuations and expense expectations;

changes in the levels of loan prepayments and the resulting effects on the value of the Company’s loan
portfolio;

changes in local economic and business conditions which adversely affect the Company’s customers
and their ability to transact profitable business with the company, including the ability of the Company’s
borrowers to repay their loans according to their terms or a change in the value of the related collateral;

increased competition for deposits and loans adversely affecting rates and terms;

the timing, impact and other uncertainties of future acquisitions, including the Company’s ability to
identify suitable future acquisition candidates,
the success or failure in the integration of their
operations, and the ability to enter new markets successfully and capitalize on growth opportunities;

increased credit risk in the Company’s assets and increased operating risk caused by a material change
in commercial, consumer and/or real estate loans as a percentage of the total loan portfolio;

the failure of assumptions underlying the establishment of and provisions made to the allowance for
credit losses;

changes in the availability of funds resulting in increased costs or reduced liquidity;

increased asset levels and changes in the composition of assets and the resulting impact on the
Company’s capital levels and regulatory capital ratios;

the Company’s ability to acquire, operate and maintain cost effective and efficient systems without
incurring unexpectedly difficult or expensive but necessary technological changes;

the loss of senior management or operating personnel and the potential inability to hire qualified
personnel at reasonable compensation levels;

changes in statutes and government regulations or their interpretations applicable to financial holding
companies and the Company’s present and future banking and other subsidiaries, including changes in
tax requirements and tax rates;

acts of terrorism, an outbreak of hostilities or other international or domestic calamities, weather or
other acts of God and other matters beyond the Company’s control; and

other risks and uncertainties listed from time to time in the Company’s reports and documents filed with
the Securities and Exchange Commission.

A forward-looking statement may include a statement of the assumptions or bases underlying the forward-
looking statement. The Company believes it has chosen these assumptions or bases in good faith and that they are
reasonable. However, the Company cautions you that assumptions or bases almost always vary from actual
results, and the differences between assumptions or bases and actual results can be material. Therefore, the

27

Company cautions you not to place undue reliance on its forward-looking statements. The forward-looking
statements are made as of the date the statement is made. The Company undertakes no obligation to publicly
update or otherwise revise any forward-looking statements, whether as a result of new information, future events
or otherwise.

Management’s Discussion and Analysis of Financial Condition and Results of Operations analyzes the
major elements of the Company’s balance sheets and statements of income. This section should be read in
conjunction with the Company’s consolidated financial statements and accompanying notes and other detailed
information appearing elsewhere in this Annual Report on Form 10-K.

For the Years Ended December 31, 2006, 2005 and 2004

Overview

The Company generates the majority of its revenues from interest income on loans, service charges on
customer accounts and income from investment in securities. The revenues are partially offset by interest
expense paid on deposits and other borrowings and non-interest expenses such as administrative and occupancy
expenses. Net interest income is the difference between interest income on earning assets such as loans and
securities and interest expense on liabilities such as deposits and borrowings which are used to fund those assets.
Net interest income is the Company’s largest source of revenue, representing 52.0% of total revenue during 2006.
The level of interest rates and the volume and mix of earning assets and interest-bearing liabilities impact net
interest income and margin. The Company has recognized increased net interest income due primarily to an
increase in the volume of interest-earning assets.

Three principal components of the Company’s growth strategy are internal growth, stringent cost control
practices and strategic merger transactions. The Company focuses on continual internal growth. Each banking
center is operated as a separate profit center, maintaining separate data with respect to its net interest income,
efficiency ratio, deposit growth, loan growth and overall profitability. Banking center presidents and managers
are accountable for performance in these areas and compensated accordingly. The Company also focuses on
maintaining stringent cost control practices and policies. The Company has invested significantly in the
infrastructure required to centralize many of its critical operations, such as data processing and loan processing.
Management believes that this centralized infrastructure can accommodate substantial additional growth while
enabling the Company to minimize operational costs through certain economies of scale. The Company also
intends to continue to seek expansion opportunities. During 2004, seven banking centers were acquired in the
Austin, Texas area, two of which was subsequently closed and consolidated into existing banking centers of the
Company. The acquisitions of both Liberty Bancshares, Inc. (the “Liberty acquisition”) and Village Bank and
Trust s.s.b. (the “Village acquisition”) were completed on August 1, 2004. During 2005,
twenty-seven
(27) banking centers were acquired in the acquisition of First Capital Bankers, Inc. (the “First Capital
acquisition”) on March 1, 2005, two of which was subsequently closed and consolidated into existing banking
centers of the Company. Two (2) additional banking centers were acquired in the acquisition of Grapeland
Bancshares, Inc. (the “Grapeland acquisition”) on December 1, 2005. On April 1, 2006, the Company acquired
SNB Bancshares, Inc. (the “SNB Bancshares acquisition”) which added five (5) banking centers. At the time of
acquisition, SNB had an additional banking office under construction in Katy, Texas, which became a full-
service banking center of the Company upon completion in July 2006.

Net income was $61.7 million, $47.9 million and $34.7 million for the years ended December 31, 2006,
2005 and 2004, respectively, and diluted earnings per share were $1.94, $1.77 and $1.59, respectively, for these
same periods. Earnings growth during both 2006 and 2005 resulted principally from an increase in loan volume
and acquisitions, including the First Capital acquisition in March 2005 and the SNB acquisition in April 2006.
Earnings growth during 2004 also resulted principally from an increase in loan volume and acquisitions,
including the Liberty and Village acquisitions. The Company posted returns on average assets of 1.44%, 1.42%

28

and 1.36% and returns on average equity of 10.24%, 11.56% and 14.27% for the years ended December 31,
2006, 2005 and 2004, respectively. The Company’s efficiency ratio was 45.29% in 2006, 48.93% in 2005 and
49.45% in 2004. The efficiency ratio is calculated by dividing total noninterest expense (excluding credit loss
provisions) by net interest income plus noninterest income (excluding net gains and losses on the sale of
securities and on the sale of assets). Additionally, taxes are not part of this calculation.

Total assets at December 31, 2006 and 2005 were $4.587 billion and $3.586 billion, respectively. Total
deposits at December 31, 2006 and 2005 were $3.726 billion and $2.920 billion, respectively. Total loans were
$2.177 billion at December 31, 2006, an increase of $634.4 million or 41.14% compared with $1.542 billion at
December 31, 2005. At December 31, 2006, the Company had $948,000 in nonperforming loans and its
allowance for credit losses was $24.0 million. Shareholders’ equity was $664.4 million and $464.7 million at
December 31, 2006 and 2005, respectively.

Acquisition of Texas United Bancshares, Inc.

On January 31, 2007, the Company completed its acquisition of Texas United Bancshares, Inc., La Grange,
Texas (“TXUI”). Under the terms of the merger agreement, TXUI was merged into the Company and
subsequently, each of TXUI’s wholly owned subsidiary banks, State Bank, GNB Financial, n.a., Gateway
National Bank and Northwest Bank, was merged with the Bank. The Company issued approximately
10.770 million shares of its common stock for all of the issued and outstanding capital stock of TXUI. In
addition, options to acquire 179,956 shares of TXUI common stock were converted into options to acquire
179,956 shares of Company common stock. In connection with the merger, the Company assumed $44.8 million
in junior subordinated debentures issued to five subsidiary trusts. TXUI was publicly traded and operated forty-
three (43) banking offices in Texas. As of December 31, 2006, TXUI had, on a consolidated basis, total assets of
$1.806 billion, loans of $1.212 billion, deposits of $1.362 billion and shareholders’ equity of $161.9 million.

Critical Accounting Policies

The Company’s significant accounting policies are integral to understanding the results reported. The
Company’s accounting policies are described in detail in Note 1 to the consolidated financial statements. The
Company believes that of its significant accounting policies, the following may involve a higher degree of
judgment and complexity:

Allowance for Credit Losses—The allowance for credit losses is a reserve established through charges to
earnings in the form of a provision for credit losses. Management has established an allowance for credit losses
which it believes is adequate for estimated losses in the Company’s loan portfolio. Based on an evaluation of the
loan portfolio, management presents a monthly review of the allowance for credit losses to the Bank’s Board of
Directors,
indicating any change in the allowance since the last review and any recommendations as to
adjustments in the allowance. In making its evaluation, management considers factors such as historical loan loss
experience, industry diversification of the Company’s commercial loan portfolio, the amount of nonperforming
assets and related collateral, the volume, growth and composition of the Company’s loan portfolio, current
economic changes that may affect the borrower’s ability to pay and the value of collateral, the evaluation of the
Company’s loan portfolio through its internal loan review process and other relevant factors. Portions of the
allowance may be allocated for specific credits; however, the entire allowance is available for any credit that, in
management’s judgment, should be charged off. Charge-offs occur when loans are deemed to be uncollectible.
The allowance for credit losses includes allowance allocations calculated in accordance with Statement of
Financial Accounting Standards (SFAS) No. 114, “Accounting by Creditors for Impairment of a Loan,” as
amended by SFAS 118, and allowance allocations determined in accordance with SFAS No. 5, “Accounting for
Contingencies.”

Goodwill and Intangible Assets—Goodwill and intangible assets that have indefinite useful lives are subject
to an annual impairment test at least annually and more frequently if circumstances indicate their value may not
be recoverable. Goodwill is tested for impairment using a two-step process that begins with an estimation of the

29

fair value of each of the Company’s reporting units compared with its carrying value. If the carrying amount
exceeds the fair value of a reporting unit, a second step test is completed comparing the implied fair value of the
reporting unit’s goodwill to its carrying value to measure the amount of impairment. Intangible assets that are not
amortized will be tested for impairment at least annually by comparing the fair values of those assets to their
carrying values. Other identifiable intangible assets that are subject to amortization are amortized on an
accelerated basis over the years expected to be benefited, which the Company believes is eight years. These
amortizable intangible assets are reviewed for impairment if circumstances indicate their value may not be
recoverable based on a comparison of fair value to carrying value. Based on the Company’s annual goodwill
impairment test as of September 30, 2006, management does not believe any of its goodwill is impaired as of
December 31, 2006. While the Company believes no impairment existed at December 31, 2006 under accounting
standards applicable at that date, different conditions or assumptions, or changes in cash flows or profitability, if
significantly negative or unfavorable, could have a material adverse effect on the outcome of the Company’s
impairment evaluation and financial condition or future results of operations.

Stock-Based Compensation—The Company adopted the provisions of SFAS No. 123R “Share-Based
Payment (Revised 2004),” on January 1, 2006 and its adoption did not have a material impact on the Company’s
financial statements. The Company had previously adopted SFAS No. 123 on January 1, 2003. Among other
things, SFAS No. 123R eliminates the ability to account for stock-based compensation using the intrinsic value
based method of accounting and requires that such transactions be recognized as compensation expense in the
income statement based on their fair values on the date of the grant. SFAS No. 123R requires that management
make assumptions including stock price volatility and employee turnover that are utilized to measure
compensation expense. The fair value of stock options granted is estimated at the date of grant using the Black-
Scholes option-pricing model. This model requires the input of highly subjective assumptions.

Valuation of Securities—The Company’s available for sale securities portfolio is reported at fair value.
When the fair value of a security is below its amortized cost, and depending on the length of time the condition
exists and the extent the fair value is below amortized cost, additional analysis is performed to determine whether
an impairment exists. Available for sale and held to maturity securities are analyzed quarterly for possible other-
than-temporary impairment. The analysis considers the financial condition and near-term prospects of the issuer,
as well as the value of any security we may have in the investment. Often, the information available to conduct
these assessments is limited and rapidly changing, making estimates of fair value subject to judgment. If actual
information or conditions are different than estimated, the extent of the impairment of the security may be
different than previously estimated, which could have a material effect on the Company’s results of operations
and financial condition.

Results of Operations

Net Interest Income

The Company’s operating results depend primarily on its net interest income, which is the difference
between interest income on interest-earning assets, including securities and loans, and interest expense incurred
on interest-bearing liabilities, including deposits and other borrowed funds. Interest rate fluctuations, as well as
changes in the amount and type of earning assets and liabilities, combine to affect net interest income. The
Company’s net interest income is affected by changes in the amount and mix of interest-earning assets and
interest-bearing liabilities, referred to as a “volume change.” It is also affected by changes in yields earned on
interest-earning assets and rates paid on interest-bearing deposits and other borrowed funds, referred to as a “rate
change.”

interest

2006 versus 2005. Net

losses for the year ended
December 31, 2006 was $138.1 million compared with $110.9 million for the year ended December 31, 2005, an
increase of $27.2 million or 24.6%. The improvement in net interest income for 2006 was principally due to a
$732.8 million or 24.8% increase in average interest-earning assets to $3.682 billion at December 31, 2006 from
$2.949 billion at December 31 2005. The increase in average interest-earning assets was primarily due to the

income before the provision for credit

30

SNB acquisition. The improvement in net interest income for 2006 was also partially due to an increase in the
yield on interest-earning assets. The rate paid on interest-bearing liabilities increased 105 basis points from
2.21% for the year ended December 31, 2005 to 3.26% for the year ended December 31, 2006 and total yield on
interest-earning assets increased 79 basis points from 5.50% at December 31, 2005 to 6.29% at December 31,
2006. At December 31, 2006, period end demand deposits represented an important component of funding
sources and was 22.4% of total period end deposits compared with 23.1% at December 31, 2005.

Net interest margin on a tax equivalent basis, defined as net interest income divided by average interest-

earning assets, for 2006 was 3.80%, down 1 basis point from 3.81% in 2005

interest

2005 versus 2004. Net

income before the provision for credit

losses for the year ended
December 31, 2005 was $110.9 million compared with $82.0 million for the year ended December 31, 2004, an
increase of $28.9 million or 35.3%. The improvement in net interest income for 2005 was principally due to a
$647.7 million or 28.1% increase in average interest-earning assets to $2.949 billion at December 31, 2005 from
$2.302 billion at December 31 2004. The increase in average interest-earning assets was primarily due to the
First Capital acquisition. The improvement in net interest income for 2005 was also partially due to an increase
in the yield on interest-earning assets that was greater than the increase in the rate paid on interest-bearing
liabilities. Total cost of interest-bearing liabilities increased 57 basis points from 1.64% for the year ended
December 31, 2004 to 2.21% for the year ended December 31, 2005, while total yield on interest-earning assets
increased 64 basis points from 4.86% at December 31, 2004 to 5.50% at December 31, 2005. At December 31,
2005, period end demand deposits represented an important component of funding sources and was 23.1% of
total period end deposits compared with 22.4% at December 31, 2004.

Net interest margin on a tax equivalent basis for 2005 was 3.81%, up 18 basis points from 3.63% in 2004.

The increase in the net interest margin was primarily attributable to an increase in interest-earning assets.

31

The following table presents, for the periods indicated, the total dollar amount of average balances, interest
income from average interest-earning assets and the resultant yields, as well as the interest expense on average
interest-bearing liabilities, expressed both in dollars and rates. Except as indicated in the footnotes, no
tax-equivalent adjustments were made and all average balances are daily average balances. Any nonaccruing
loans have been included in the table as loans carrying a zero yield.

Years Ended December 31,

2006

2005

2004

Average
Outstanding
Balance

Interest
Earned/
Paid

Average
Yield/
Rate

Average
Outstanding
Balance

Interest
Earned/
Paid

Average
Yield/
Rate

Average
Outstanding
Balance

Interest
Earned/
Paid

Average
Yield/
Rate

(Dollars in thousands)

$2,037,379
1,612,221

$157,426
72,632

7.73% $1,435,376
1,471,067
4.51

$ 99,958
60,866

6.96% $ 871,736
1,383,790
4.14

$ 55,779
55,241

6.40%
3.99

Assets
Interest-earning assets:

Loans held for investment
Securities(1)
Federal funds sold and other temporary

. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .

investments . . . . . . . . . . . . . . . . . . . . . .

32,522

1,681

5.17

42,859

1,299

3.03

46,121

736

1.60

Total interest-earning assets.

. . . . . . .

3,682,122

231,739

6.29%

2,949,302

162,123

5.50%

2,301,647

111,756

4.86%

Less allowance for credit losses . . . . . . . . .

(22,476)

Total interest-earning assets, net of

allowance. . . . . . . . . . . . . . . . . . . .
Noninterest-earning assets . . . . . . . . . . . . .

3,659,646
624,149

Total assets . . . . . . . . . . . . . . . . . . . .

$4,283,795

(16,334)

2,932,968
428,649

$3,361,617

(11,454)

2,290,193
252,895

$2,543,088

Liabilities and shareholders’ equity
Interest-bearing liabilities:

Interest-bearing demand deposits . . . . . . . .
. . . . .
Savings and money market accounts.
. . . . . . . . . . . . . . . .
Certificates of deposit.
Junior subordinated debentures . . . . . . . . . .
Securities sold under repurchase

agreements . . . . . . . . . . . . . . . . . . . . . . .
Other borrowings . . . . . . . . . . . . . . . . . . . .

$ 602,946
897,667
1,165,056
92,271

$ 11,440
23,539
45,963
7,592

1.90% $ 477,199
696,237
2.62
1,009,147
3.95
69,869
8.23

$ 4,666
10,683
28,294
4,895

0.98% $ 485,557
495,330
1.53
735,095
2.80
59,288
7.00

$ 5,027
4,002
15,557
4,046

1.04%
0.81
2.12
6.82

45,488
64,052

1,820
3,240

4.00
5.06

29,850
40,794

768
1,920

2.57
4.71

19,522
20,597

232
925

1.19
4.49

Total interest-bearing liabilities . . . . .

2,867,480

93,594

3.26%

2,323,096

51,226

2.21%

1,815,389

29,789

1.64%

Noninterest-bearing liabilities:

Noninterest-bearing demand deposits . . . . .
Other liabilities. . . . . . . . . . . . . . . . . . . . . .

783,431
30,172

Total liabilities.

. . . . . . . . . . . . . . . . .

3,681,083

Shareholders’ equity . . . . . . . . . . . . . . . . . . . .

602,712

Total liabilities and shareholders’

609,230
15,427

2,947,753

413,864

473,713
10,712

2,299,814

243,274

equity. . . . . . . . . . . . . . . . . . . . . . .

$4,283,795

$3,361,617

$2,543,088

Net interest rate spread . . . . . . . . . . . . . . . . . .

3.03%

3.29%

3.21%

Net interest income and margin(2)

. . . . . . . . . .

$138,145

3.75%

$110,897

3.76%

$ 81,967

3.56%

Net interest income and margin (tax-equivalent
. . . . . . . . . . . . . . . . . . . . . . . . . . .

basis)(3)

$139,961

3.80%

$112,262

3.81%

$ 83,631

3.63%

(1) Yield is based on amortized cost and does not include any component of unrealized gains or losses.
(2) The net interest margin is equal to net interest income divided by average interest-earning assets.
(3)

In order to make pretax income and resultant yields on tax-exempt investments and loans comparable to those on taxable investments and
loans, a tax-equivalent adjustment has been computed using a federal income tax rate of 35% for the years ended December 31, 2006,
2005 and 2004 and other applicable effective tax rates.

32

The following table presents information regarding the dollar amount of changes in interest income and
interest expense for the major components of interest-earning assets and interest-bearing liabilities and
distinguishes between the increase (decrease) related to higher outstanding balances and the changes in interest
rates. For purposes of this table, changes attributable to both rate and volume which cannot be segregated have
been allocated to rate.

Years Ended December 31,

2006 vs. 2005

2005 vs. 2004

Increase
(Decrease)
Due to Change in

Increase
(Decrease)
Due to Change in

Volume

Rate

Total

Volume

Rate

Total

(Dollars in thousands)

$41,923
5,840

$15,545
5,926

$57,468
11,766

$36,065
3,484

$ 8,114
2,141

$44,179
5,625

Interest-earning assets:

Loans held for investment . . . . . . . . . . . . . . .
Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Federal funds sold and other temporary

investments . . . . . . . . . . . . . . . . . . . . . . . .

(313)

695

382

(52)

615

563

Total increase in interest income . . . . . .

47,450

22,166

69,616

39,497

10,870

50,367

Interest-bearing liabilities:

Interest-bearing demand deposits . . . . . . . . .
Savings and money market accounts. . . . . . .
Certificates of deposit . . . . . . . . . . . . . . . . . .
Junior subordinated debentures . . . . . . . . . . .
Securities sold under repurchase

agreements . . . . . . . . . . . . . . . . . . . . . . . . .
Other borrowings . . . . . . . . . . . . . . . . . . . . . .

1,230
3,091
4,371
1,569

402
1,095

5,544
9,765
13,298
1,128

6,774
12,856
17,669
2,697

650
225

1,052
1,320

(87)
1,623
5,800
722

123
907

(274)
5,058
6,937
127

(361)
6,681
12,737
849

413
88

536
995

Total increase in interest expense . . . . .

11,758

30,610

42,368

9,088

12,349

21,437

Increase (decrease) in net interest income . . . . . .

$35,692

$ (8,444) $27,248

$30,409

$ (1,479) $28,930

Provision for Credit Losses

The Company’s provision for credit losses is established through charges to income in the form of the
provision in order to bring the Company’s allowance for credit losses to a level deemed appropriate by
management based on the factors discussed under Financial Condition—Allowance for Credit Losses. The
allowance for credit losses at December 31, 2006 was $24.0 million, representing 1.10% of outstanding loans.
The provision for credit losses for the year ended December 31, 2006 was $504,000 compared with $480,000 for
the year ended December 31, 2005. Net charge-offs for the year ended December 31, 2006 were $771,000
compared with $410,000 in net charge-offs for the year ended December 31, 2005. The provision for credit
losses for the year ended December 31, 2005 was $480,000 compared with $880,000 for the year ended
December 31, 2004. In 2004, an additional $400,000 provision for credit losses was made in anticipation of
increased charge-offs related to loans acquired in merger transactions that year. Net charge-offs for the year
ended December 31, 2004 were $485,000.

Noninterest Income

The Company’s primary sources of recurring noninterest income are service charges on deposit accounts
and other banking service related fees. Noninterest income does not include loan origination fees which are
recognized over the life of the related loan as an adjustment to yield using the interest method. Banking related
service fees include check cashing fees, official check fees, safe deposit box rent and currency handling fees. For
the year ended December 31, 2006, noninterest income totaled $34.0 million, an increase of $4.0 million or

33

13.2% compared with $30.0 million in 2005. The increase was primarily due to an increase in insufficient funds
charges and customer service charges which resulted from an increase in the number of accounts due to the First
Capital acquisition completed in March 2005, the Grapeland acquisition in December 2005 and the SNB
acquisition in April 2006. As of December 31, 2006, these three acquisitions added approximately 45,000 deposit
accounts and over 16,000 debit cards. Noninterest income for 2005 was $30.0 million, an increase of $7.0 million
or 30.1% compared with $23.1 million in 2004, resulting largely from an increase in service charges due to the
additional deposit accounts from the Liberty and Village acquisitions completed in August 2004 and the First
Capital acquisition in March 2005.

Brokered mortgage income increased $144,000 to $839,000 for the year ended December 31, 2006
compared with $695,000 for the year ended December 31, 2005. The increase was primarily due to additional
mortgage loan originations resulting from the mortgage division of SNB acquired in April 2006 and the mortgage
division of First Capital that was acquired in March 2005.

Income from leased assets increased $180,000 from $895,000 for the year ended December 31, 2005 to
$1.1 million for the year ended December 31, 2006. The expiration dates of the leased assets range from 2009 to
2011 and the related depreciation expense for the leased assets was $756,000 and $630,000 for the years ended
December 31, 2006 and 2005, respectively. Income from Bank Owned Life Insurance (BOLI) increased
$103,000 from $397,000 for the year ended December 31, 2005 to $500,000 for the year ended December 31,
2006. Both leased assets and bank owned life insurance were acquired in the First Capital acquisition.

The following table presents, for the periods indicated, the major categories of noninterest income:

Years Ended December 31,

2006

2005

2004

Service charges on deposit accounts. . . . . . . . . . . . . . . . . . . . . . . . . .
Banking related service fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brokered mortgage income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trust and investment income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income from leased assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bank Owned Life Insurance income (BOLI) . . . . . . . . . . . . . . . . . . .
Gains on sales of assets (net) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net (loss) gain on sale of securities . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on held for sale loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other noninterest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Dollars in thousands)
$24,985
1,133
695
274
895
397
72
(79)
173
1,476

$27,379
1,358
839
208
1,075
500
622(1)
—
—
2,001

$20,215
1,002
383
214
—
—
315(2)
78
74
790

Total noninterest income. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$33,982

$30,021

$23,071

(1)
(2)

Includes gains on the sale of real estate in Beeville, Palacios, Red Oak and Victoria.
Includes gains on the sale of TIB-The Independent BankersBank stock acquired in various acquisitions and
a gain on the sale of real property acquired in the Paradigm acquisition.

Noninterest Expense

For the year ended December 31, 2006, noninterest expense totaled $77.7 million, an increase of
$8.7 million or 12.6% compared with $69.0 million for the same period in 2005. This increase was principally
due to increases in salaries and employee benefits, net occupancy, depreciation costs, ad valorem and franchise
taxes and core deposit intangibles amortization primarily as a result of the SNB acquisition. For the year ended
December 31, 2005, noninterest expense totaled $69.0 million, an increase of $17.3 million or 33.4% compared
with $51.7 million for the same period in 2004. The increase was primarily attributable to the additional general
operating costs associated with the acquisitions completed in 2005 and the full year effect of the acquisitions
completed in 2004. These items and other changes in the various components of noninterest expense are
discussed in more detail below.

34

The following table presents, for the periods indicated, the major categories of noninterest expense:

Years Ended December 31,

2006

2005

2004

Salaries and employee benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-staff expenses:

(Dollars in thousands)
$36,672

$41,298

$27,861

Net occupancy expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Depreciation expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulatory assessments and FDIC insurance . . . . . . . . . . . . . .
Ad valorem and franchise taxes.
. . . . . . . . . . . . . . . . . . . . . . . .
Core deposit intangibles amortization . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communications expense(1)
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7,884
5,048
3,612
716
2,246
4,869
4,339
7,657

6,663
4,462
2,837
548
1,594
3,912
3,782
8,487

4,814
2,843
2,036
524
1,154
1,781
2,929
7,765

Total noninterest expense(2)

. . . . . . . . . . . . . . . . . . . . . . . .

$77,669

$68,957

$51,707

(1) Communications expense includes telephone, data circuits, postage and courier expenses.
(2) Total noninterest expense includes $850,000, $751,000 and $141,000 in 2006, 2005 and 2004 respectively,

in stock-based compensation expense.

Salaries and Employee Benefits. Salaries and employee benefits increased $4.6 million to $41.3 million at
December 31, 2006 compared with $36.7 million at December 31, 2005 primarily due to increased staff added
with the SNB acquisition in April 2006. The number of associates employed by the Company increased from 859
at December 31, 2005 to 908 at December 31, 2006. Salaries and employee benefits increased $8.8 million from
$27.9 million at December 31, 2004 to $36.7 million at December 31, 2005 primarily due to increased staff
added with the Liberty and Village acquisitions in August 2004 and the First Capital acquisition in March 2005.
The number of associates employed by the Company increased from 653 at December 31, 2004 to 859 at
December 31, 2005. In accordance with the Company’s adoption of SFAS 123R, total noninterest expense for the
year ended December 31, 2006 includes $850,000 in stock-based compensation expense compared with $751,000
and $141,000 recorded for the years ended December 31, 2005 and 2004, respectively.

Net Occupancy, Depreciation Expenses and Ad Valorem and Franchise Taxes. Net occupancy expense
increased $1.2 million or 18.33% to $7.9 million for the year ended December 31, 2006 compared with
$6.7 million for the year ended December 31, 2005. Depreciation expense increased $600,000 to $5.0 million
compared with $4.5 million for the same periods and ad valorem and franchise taxes increased $652,000 or
40.9% to $2.2 million. These increases were primarily attributable to the addition of five (5) banking centers and
the completion of construction of one banking center, all acquired in 2006. Net occupancy expense increased
$1.8 million or 38.4% to $6.7 million for the year ended December 31, 2005 compared with $4.8 million for the
year ended December 31, 2004. Depreciation expense increased $1.6 million to $4.5 million compared with
$2.8 million for the same periods and ad valorem and franchise taxes increased $440,000 or 38.1% to $1.6
million. These increases were primarily attributable to the addition of thirty-two (32) banking centers acquired in
2004 and 2005.

Communications Expense. Communications expense includes telephone, data circuits, postage and courier
expenses. Communications expense increased $557,000 or 14.7% from $3.8 million for the year December 31,
2005 to $4.3 million for the same period in 2006. The increase was primarily associated with the addition of six
banking centers in 2006. Communications expense was $3.8 million for the year ended December 31, 2005
compared with $2.9 million for the same period in 2004, an increase of $853,000 or 29.1%. The increase was
primarily attributable to the addition of thirty-two (32) banking centers in 2004 and 2005.

35

Core Deposit Intangibles Amortization. Core deposit intangibles amortization increased $1.0 million or
24.5% from $3.9 million for the year December 31, 2005 to $4.9 million for the same period in 2006. The
increase was associated with the addition of $5.7 million in core deposit intangible assets related to the SNB
acquisition. Core deposit intangibles amortization was $3.9 million for the year ended December 31, 2005
compared with $1.8 million for the same period in 2004, an increase of $2.1 million or 119.7%. The increase was
attributable to the addition of $21.4 million in core deposit intangible assets related to the acquisitions made in
2004 and 2005. Core deposit intangibles are being amortized on an accelerated basis over an eight year life.

Other Noninterest Expense. Other operating expenses decreased $830,000 or 9.8% from $8.5 million at
December 31, 2005 to $7.7 million for the year ended December 31, 2006. The decrease was primarily
attributable to a decrease in advertising expense which is a component of other expenses. Other operating
expenses of $8.5 million for the year ended December 31, 2005 represented an increase of $721,000 or 9.3%
compared with $7.8 million in 2004. The increase was primarily attributable to advertising expense and
additional operating expenses related to the First Capital acquisition in 2005.

Efficiency Ratio. The efficiency ratio is a supplemental financial measure utilized in management’s internal
evaluation of the Company and is not defined under generally accepted accounting principles. The efficiency
ratio is calculated by dividing total noninterest expense, excluding credit loss provisions, by net interest income
plus noninterest income, excluding net gains and losses on the sale of securities and on the sale of assets. Taxes
are not part of this calculation. An increase in the efficiency ratio indicates that more resources are being utilized
to generate the same volume of income, while a decrease would indicate a more efficient allocation of resources.
The Company’s efficiency ratio was 45.29% at December 31, 2006, a decrease from 48.93% at December 31,
2005. The decrease reflects the Company’s continued success in controlling operating expenses and the cost
savings achieved with the SNB acquisition in 2006. The Company’s efficiency ratio was 49.45% at
December 31, 2004.

Income Taxes

The amount of federal income tax expense is influenced by the amount of taxable income, the amount of
tax-exempt income, the amount of nondeductible interest expense and the amount of other nondeductible
expenses. For the year ended December 31, 2006, income tax expense was $32.2 million compared with
$23.6 million for the year ended December 31, 2005 and $17.7 million for the year ended December 31, 2004.
The increases were primarily attributable to higher pretax net earnings which resulted from an increase in net
interest income for the year ended December 31, 2006 compared with the same period in 2005 and 2004. The
effective tax rate for the years ended December 31, 2006, 2005 and 2004 was 34.3%, 33.0% and 33.8%,
respectively. The effective income tax rates differed from the U.S. statutory rate of 35% during the comparable
periods primarily due to the effect of tax-exempt income from loans and securities.

Impact of Inflation

The Company’s consolidated financial statements and related notes included in this annual report on
Form 10-K have been prepared in accordance with generally accepted accounting principles. These require the
measurement of financial position and operating results in terms of historical dollars, without considering
changes in the relative purchasing power of money over time due to inflation.

Unlike many industrial companies, substantially all of the Company’s assets and liabilities are monetary in
nature. As a result, interest rates have a more significant impact on the Company’s performance than the effects
of general levels of inflation. Interest rates may not necessarily move in the same direction or in the same
magnitude as the prices of goods and services. However, other expenses do reflect general levels of inflation.

36

Financial Condition

Loan Portfolio

At December 31, 2006, total loans were $2.177 billion, an increase of $634.4 million or 41.1% compared
with $1.542 billion at December 31, 2005. The growth in loans was primarily attributable to the combined effect
of internal growth and the SNB acquisition. At December 31, 2006, total loans at the banking centers acquired in
2006 totaled $519.3 million. At December 31, 2006, total loans were 58.4% of deposits and 47.5% of total assets.
At December 31, 2005, total loans were 52.8% of deposits and 43.0% of total assets. Loans increased 48.9%
during 2005 from $1.036 billion at December 31, 2004 to $1.542 billion at December 31, 2005. The growth in
loans was primarily attributable to internal growth and the First Capital and Grapeland acquisitions.

The following table summarizes the Company’s loan portfolio by type of loan as of the dates indicated:

2006

2005

2004

2003

2002

Amount Percent Amount Percent Amount Percent Amount Percent Amount Percent

December 31,

Commercial and industrial . . . . . $ 280,957
Real estate:

12.9% $ 222,773

14.4% $ 144,432

13.9% $ 93,989

12.2% $ 93,797

13.8%

(Dollars in thousands)

Construction and land

development . . . . . . . . . . . .
1-4 family residential . . . . . . .
Home equity . . . . . . . . . . . . . .
Commercial mortgages . . . . . .
Farmland . . . . . . . . . . . . . . . . .
Multifamily residential . . . . . .
Agriculture . . . . . . . . . . . . . . . . .
Consumer (net of unearned

discount).

. . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . .

433,178
376,996
63,427
803,145
30,925
77,980
26,504

66,675
16,720

19.9
17.3
2.9
36.9
1.4
3.6
1.2

3.1
0.8

206,653
313,184
58,729
566,356
30,920
32,039
25,429

65,183
20,859

13.4
20.3
3.8
36.7
2.0
2.1
1.6

4.3
1.4

109,591
260,453
34,453
369,151
22,240
18,187
21,906

52,854
2,246

10.6
25.2
3.3
35.6
2.1
1.9
2.1

5.1
0.2

36,470
237,055
27,943
260,882
15,247
20,679
20,693

54,821
2,274

4.7
30.8
3.6
33.9
2.0
2.7
2.7

7.1
0.3

52,377
206,586
23,249
183,970
11,887
15,502
24,683

64,488
3,020

7.7
30.4
3.4
27.1
1.7
2.3
3.6

9.6
0.4

Total loans. . . . . . . . . . . . . . $2,176,507

100.0% $1,542,125

100.0% $1,035,513

100.0% $770,053

100.0% $679,559

100.0%

The Company is focused on growing its construction and land development, commercial mortgage and
commercial and industrial loan portfolios. The Company’s construction and land development loans grew from
$206.7 million at December 31, 2005 to $433.2 million at December 31, 2006, an increase of $226.5 million or
109.6%. The Company’s commercial mortgages grew from $566.4 million at December 31, 2005 to
$803.1 million at December 31, 2006, an increase of $236.8 million or 41.8%. The Company’s commercial and
industrial loans grew from $222.8 million at December 31, 2005 to $281.0 million at December 31, 2006, an
increase of $58.2 million or 26.1%. The Company offers a variety of commercial lending products including
term loans and lines of credit. The Company offers a broad range of short to medium-term commercial loans,
primarily collateralized,
to businesses for working capital (including inventory and receivables), business
expansion (including acquisitions of real estate and improvements) and the purchase of equipment and
machinery. Historically, the Company has originated loans for its own account and has not securitized its loans.
The purpose of a particular loan generally determines its structure. All loans in the 1-4 family residential
category were originated by the Company.

All loans over $500,000 and below $1.0 million are evaluated and acted upon on a daily basis by two of the
Company’s regional loan concurrence officers. All loans over $1.0 million and below $2.5 million are evaluated
and acted upon on a daily basis by two of the Company’s six company-wide loan concurrence officers. All loans
above $2.5 million are evaluated and acted upon by an officers’ loan committee, which meets weekly. In addition
to the officers’ loan committee evaluation, loans from $15.0 million to $25.0 million are evaluated and acted
upon by the directors’ loan committee, which consists of three directors of the bank and meets as necessary.
Loans over $25.0 million are evaluated and acted upon by the Bank’s board of directors either at a regularly
scheduled monthly board meeting or by teleconference or written consent.

37

Commercial and Industrial Loans. In nearly all cases, the Company’s commercial loans are made in the
Company’s market areas and are underwritten on the basis of the borrower’s ability to service the debt from
income. As a general practice, the Company takes as collateral a lien on any available real estate, equipment or
other assets owned by the borrower and obtains a personal guaranty of the borrower or principal. Working capital
loans are primarily collateralized by short-term assets whereas term loans are primarily collateralized by long-
term assets. In general, commercial
loans involve more credit risk than residential mortgage loans and
commercial mortgage loans and, therefore, usually yield a higher return. The increased risk in commercial loans
is due to the type of collateral securing these loans. The increased risk also derives from the expectation that
commercial loans generally will be serviced principally from the operations of the business, and those operations
may not be successful. Historical trends have shown these types of loans to have higher delinquencies than
mortgage loans. As a result of these additional complexities, variables and risks, commercial loans require more
thorough underwriting and servicing than other types of loans.

Commercial Mortgages. The Company makes commercial mortgage loans collateralized by real estate to
finance the purchase of real estate. The Company’s commercial mortgage loans are collateralized by first liens on
real estate, typically have variable interest rates and amortize over a ten to 15 year period. Payments on loans
secured by such properties are often dependent on the successful operation or management of the properties.
Accordingly, repayment of these loans may be subject to adverse conditions in the real estate market or the
economy to a greater extent than other types of loans. The Company seeks to minimize these risks in a variety of
ways, including giving careful consideration to the property’s operating history, future operating projections,
current and projected occupancy, location and physical condition in connection with underwriting these loans.
The underwriting analysis also includes credit verification, appraisals and a review of the financial condition of
the borrower.

1-4 Family Residential Loans. A significant portion of the Company’s lending activity has consisted of the
origination of 1-4 family residential mortgage loans collateralized by owner-occupied properties located in the
Company’s market areas. The Company offers a variety of mortgage loan products which generally are
amortized over five to 25 years. Loans collateralized by 1-4 family residential real estate generally have been
originated in amounts of no more than 90% of appraised value or have mortgage insurance. The Company
requires mortgage title insurance and hazard insurance. The Company has elected to keep all 1-4 family
residential loans for its own account rather than selling such loans into the secondary market. By doing so, the
Company is able to realize a higher yield on these loans; however, the Company also incurs interest rate risk as
well as the risks associated with nonpayments on such loans.

Construction Loans. The Company makes loans to finance the construction of residential and, to a limited
extent, nonresidential properties. Construction loans generally are collateralized by first liens on real estate and
have floating interest rates. The Company conducts periodic inspections, either directly or through an agent, prior
to approval of periodic draws on these loans. Underwriting guidelines similar to those described above are also
used in the Company’s construction lending activities. Construction loans involve additional risks attributable to
the fact that loan funds are advanced upon the security of a project under construction, and the project is of
uncertain value prior to its completion. Because of uncertainties inherent in estimating construction costs, the
market value of the completed project and the effects of governmental regulation on real property, it can be
difficult to accurately evaluate the total funds required to complete a project and the related loan to value ratio.
As a result of these uncertainties, construction lending often involves the disbursement of substantial funds with
repayment dependent, in part, on the success of the ultimate project rather than the ability of a borrower or
guarantor to repay the loan. If the Company is forced to foreclose on a project prior to completion, there is no
assurance that the Company will be able to recover all of the unpaid portion of the loan. In addition, the
Company may be required to fund additional amounts to complete a project and may have to hold the property
for an indeterminate period of time. While the Company has underwriting procedures designed to identify what it
believes to be acceptable levels of risks in construction lending, no assurance can be given that these procedures
will prevent losses from the risks described above.

38

Agriculture Loans. The Company provides agriculture loans for short-term crop production, including rice,
cotton, milo and corn, farm equipment financing and agriculture real estate financing. The Company evaluates
agriculture borrowers primarily based on their historical profitability, level of experience in their particular
agriculture industry, overall financial capacity and the availability of secondary collateral to withstand economic
and natural variations common to the industry. Because agriculture loans present a higher level of risk associated
with events caused by nature, the Company routinely makes on-site visits and inspections in order to monitor and
identify such risks.

loans, home improvement

loans, home equity loans, personal

Consumer Loans. Consumer loans made by the Company include direct “A”-credit automobile loans,
loans
recreational vehicle loans, boat
(collateralized and uncollateralized) and deposit account collateralized loans. The terms of these loans typically
range from 12 to 120 months and vary based upon the nature of collateral and size of loan. Consumer loans entail
greater risk than do residential mortgage loans, particularly in the case of consumer loans that are unsecured or
collateralized by rapidly depreciating assets such as automobiles. In such cases, any repossessed collateral for a
defaulted consumer loan may not provide an adequate source of repayment for the outstanding loan balance. The
remaining deficiency often does not warrant further substantial collection efforts against the borrower beyond
obtaining a deficiency judgment. In addition, consumer loan collections are dependent on the borrower’s
continuing financial stability, and thus are more likely to be adversely affected by job loss, divorce, illness or
personal bankruptcy. Furthermore, the application of various federal and state laws may limit the amount which
can be recovered on such loans.

The contractual maturity ranges of the commercial and industrial, construction and land development, 1-4
family residential, home equity and commercial mortgage portfolios and the amount of such loans with
predetermined interest rates and floating rates in each maturity range as of December 31, 2006 are summarized in
the following table:

1-4 family residential and home equity . . . . . . . . . . . . . . . . . .
Commercial and industrial
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commercial mortgages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Construction and land development . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total

Loans with a predetermined interest rate. . . . . . . . . . . . . . . . . .
Loans with a floating interest rate. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total

December 31, 2006

After One
Through
Five Years

After Five
Years

Total

(Dollars in thousands)

$ 54,686
112,830
247,230
96,680
$511,426

$275,222
236,204
$511,426

$ 371,770
36,307
505,124
138,108
$1,051,309

$ 398,438
652,871
$1,051,309

$ 440,423
280,957
803,145
433,178
$1,957,703

$ 774,077
1,183,626
$1,957,703

One Year
or Less

$ 13,967
131,820
50,791
198,390
$394,968

$100,417
294,551
$394,968

Nonperforming Assets

The Company has several procedures in place to assist it in maintaining the overall quality of its loan
portfolio. The Company has established underwriting guidelines to be followed by its officers and the Company
also monitors its delinquency levels for any negative or adverse trends. There can be no assurance, however, that
the Company’s loan portfolio will not become subject to increasing pressures from deteriorating borrower credit
due to general economic conditions.

The Company requires appraisals on loans collateralized by real estate. With respect to potential problem
loans, an evaluation of the borrower’s overall financial condition is made to determine the need, if any, for
possible write-downs or appropriate additions to the allowance for credit losses.

The Company generally places a loan on nonaccrual status and ceases accruing interest when the payment
of principal or interest is delinquent for 90 days, or earlier in some cases, unless the loan is in the process of

39

collection and the underlying collateral fully supports the carrying value of the loan. The Company generally
charges off such loans before attaining nonaccrual status.

The Company’s conservative lending approach has resulted in strong asset quality. The Company had
$1.1 million in nonperforming assets at December 31, 2006 compared with $1.4 million at December 31, 2005
and $1.7 million at December 31, 2004. Interest foregone on nonaccrual loans for the years ended December 31,
2006, 2005 and 2004 was $30,000, $35,000 and $54,000, respectively.

The following table presents information regarding past due loans and nonperforming assets at the dates

indicated:

Nonaccrual loans. . . . . . . . . . . . . . . . . . . . . . . . . . .
Restructured loans. . . . . . . . . . . . . . . . . . . . . . . . . .
Other nonperforming loans . . . . . . . . . . . . . . . . . .
Accruing loans 90 or more days past due . . . . . . .
Total nonperforming loans . . . . . . . . . . . . . . .
Repossessed assets . . . . . . . . . . . . . . . . . . . . . . . . .
Other real estate . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total nonperforming assets . . . . . . . . . . . . . .

Nonperforming assets to total loans and other real
estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nonperforming assets to average earning assets . .

Allowance for Credit Losses

December 31,

2006

2005

2004

2003

2002

(Dollars in thousands)

$ 181
—
—
767
948
32
140
$1,120

$ 355
—
—
788
1,143
26
239
$1,408

$ 297
—
—
1,083
1,380
—
341
$1,721

$

2

—
—
679
681
40
246
$ 967

$1,125
—
1,100
120
2,345
46
219
$2,610

0.05%
0.03%

0.09%
0.05%

0.17%
0.07%

0.13%
0.05%

0.38%
0.19%

The following table presents, as of and for the periods indicated, an analysis of the allowance for credit

losses and other related data:

Average loans outstanding . . . . . . . . . . . . . . . . .

$2,037,379

$1,435,376

$ 871,736

$697,235

$524,885

Gross loans outstanding at end of period. . . . . . .

$2,176,507

$1,542,125

$1,035,513

$770,053

$679,559

Years Ended December 31,

2006

2005

2004

2003

2002

(Dollars in thousands)

Allowance for credit losses at beginning of

period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance acquired with acquisitions . . . . . . . . . . .
Provision for credit losses . . . . . . . . . . . . . . . . . .
Charge-offs:

Commercial and industrial
. . . . . . . . . . . . .
Real estate and agriculture . . . . . . . . . . . . .
Consumer. . . . . . . . . . . . . . . . . . . . . . . . . . .

Recoveries:

Commercial and industrial
. . . . . . . . . . . . .
Real estate and agriculture . . . . . . . . . . . . .
Consumer. . . . . . . . . . . . . . . . . . . . . . . . . . .
Net charge-offs . . . . . . . . . . . . . . . . . . . . . . . . . .
. . .
Allowance for credit losses at end of period.

$

Ratio of allowance to end of period loans . . . . . .
Ratio of net charge-offs to average loans . . . . . .
Ratio of allowance to end of period

$

$

17,203
7,054
504

13,105
4,028
480

$

$

10,345
2,365
880

9,580
1,900
483

$

5,985
2,981
1,010

(353)
(128)
(696)

95
59
252
(771)
23,990

$

(410)
(242)
(240)

188
184
110
(410)
17,203

(139)
(613)
(198)

(810)
(960)
(471)

239
65
161
(485)
13,105

159
198
266
(1,618)
$ 10,345

$

$

(356)
(231)
(180)

111
175
85
(396)
9,580

1.10%
0.04

1.12%
0.03

1.27%
0.06

1.34%
0.23

1.41%
0.08

nonperforming loans . . . . . . . . . . . . . . . . . . . .

2,530.6

1,505.1

949.6

1,519.1

408.5

40

The allowance for credit losses is a valuation established through charges to earnings in the form of a
provision for credit losses. Management has established an allowance for credit losses which it believes is
adequate for estimated losses in the Company’s loan portfolio. Based on an evaluation of the loan portfolio,
management presents a quarterly review of the allowance for credit losses to the Bank’s Board of Directors,
indicating any change in the allowance since the last review and any recommendations as to adjustments in the
allowance. In making its evaluation, management considers factors such as historical loan loss experience,
industry diversification of the Company’s commercial loan portfolio, the amount of nonperforming assets and
related collateral, the volume, growth and composition of the Company’s loan portfolio, current economic
changes that may affect the borrower’s ability to pay and the value of collateral, the evaluation of the Company’s
loan portfolio through its internal loan review process and other relevant factors. Charge-offs occur when loans
are deemed to be uncollectible.

The Company considers risk elements attributable to particular loan types or categories in assessing the

quality of individual loans. Some of the risk elements include:

•

•

•

•

•

•

for 1-4 family residential mortgage loans,
including a
consideration of the debt to income ratio and employment and income stability, the loan to value ratio,
and the age, condition and marketability of collateral;

the borrower’s ability to repay the loan,

for commercial mortgage loans and multifamily residential loans, the debt service coverage ratio
(income from the property in excess of operating expenses compared to loan payment requirements),
operating results of the owner in the case of owner-occupied properties, the loan to value ratio, the age
and condition of the collateral and the volatility of income, property value and future operating results
typical of properties of that type;

for agricultural real estate loans, the experience and financial capability of the borrower, projected debt
service coverage of the operations of the borrower and loan to value ratio;

for construction and land development loans, the perceived feasibility of the project including the ability
to sell developed lots or improvements constructed for resale or ability to lease property constructed for
lease, the quality and nature of contracts for presale or preleasing, if any, experience and ability of the
developer and loan to value ratio;

for commercial and industrial loans, the operating results of the commercial, industrial or professional
enterprise, the borrower’s business, professional and financial ability and expertise, the specific risks
and volatility of income and operating results typical for businesses in that category and the value,
nature and marketability of collateral; and

for non-real estate agricultural loans, the operating results, experience and financial capability of the
borrower, historical and expected market conditions and the value, nature and marketability of
collateral.

In addition, for each category, the Company considers secondary sources of income and the financial

strength and credit history of the borrower and any guarantors.

The Company follows a loan review program to evaluate the credit risk in the loan portfolio. Through the
loan review process, the Company maintains an internal list of impaired loans which, along with the delinquency
list of loans, helps management assess the overall quality of the loan portfolio and the adequacy of the allowance
for credit losses. For each impaired loan, the Company allocates a specific loan loss reserve primarily based on
the value of the collateral securing the impaired loan in accordance with Statement of Financial Accounting
Standards (“SFAS”) No. 114, “Accounting by Creditors for Impairment of a Loan,” as amended.

41

Federal and state bank regulators also require that a bank maintain an allowance that is sufficient to absorb
an estimated amount of unidentified potential losses to the portfolio based on management’s perception of
economic conditions, loan portfolio growth, historical charge-off experience and exposure concentrations. This
unallocated allowance is also established based on the Company’s historical charge-off experience and existing
general economic and business conditions affecting the key lending areas of the Company, credit quality trends,
collateral values, loan volume, concentrations and seasoning of the loan portfolio and factors associated with the
Company’s acquisitions. The Company then charges to operations a provision for credit losses to maintain the
allowance for credit losses at an adequate level determined by the foregoing methodology.

At December 31, 2006, the allowance for credit losses totaled $24.0 million, or 1.10% of total loans. At
December 31, 2005, the allowance aggregated $17.2 million or 1.12% of total loans and at December 31, 2004,
the allowance was $13.1 million, or 1.27% of total loans.

The following tables describe the allocation of the allowance for credit losses among various categories of
loans and certain other information as of the dates indicated. The allocation is made for analytical purposes and is
not necessarily indicative of the categories in which future losses may occur. The total allowance is available to
absorb losses from any loan category.

December 31,

2006

2005

Percent of
Loans to
Total Loans

Amount

Percent of
Loans to
Total Loans

Amount

Balance of allowance for credit losses applicable to:

Commercial and industrial . . . . . . . . . . . . . . . . . . . . . . . . . . .
Real estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Agriculture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consumer and other. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unallocated(1)

$ 3,660
18,140
131
732
1,327

(Dollars in thousands)

12.9% $
82.0
1.2
3.9
—

636
923
28
53
15,563

14.4%
78.4
1.6
5.6
—

Total allowance for credit losses. . . . . . . . . . . . . . . . . . .

$23,990

100.0% $17,203

100.0%

(1)

In 2006, the Company revised its allowance methodology to provide for more specific allocation of its
reserves. The revised methodology did not have a material impact on the Company’s determination of the
overall allowance for credit losses.

2004

Percent of
Loans to

December 31,

2003

Percent of
Loans to

Amount

Total Loans Amount

Total Loans Amount

(Dollars in thousands)

2002

Percent of
Loans to
Total Loans

Balance of allowance for credit losses applicable to:

274
Commercial and industrial . . . . . . . . . . . . . . . . $
503
Real estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
Agriculture . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consumer and other. . . . . . . . . . . . . . . . . . . . . .
26
Unallocated . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12,290

13.9% $
78.7
2.1
5.3
—

253
957
35
34
9,066

12.2% $ 559
397
77.7
42
2.7
71
7.4
8,781
—

13.8%
72.6
3.6
10.0
—

Total allowance for credit losses. . . . . . . . $13,105

100.0% $10,345

100.0% $9,850

100.0%

The Company believes that the allowance for credit losses at December 31, 2006 is adequate to cover losses
inherent in the portfolio as of such date. There can be no assurance, however, that the Company will not sustain
losses in future periods, which could be substantial in relation to the size of the allowance at December 31, 2006.

42

Securities

The Company uses its securities portfolio as a source of income, as a source of liquidity for cash
requirements and to manage interest
investment securities totaled
$1.590 billion, an increase of $17.7 million or 1.1% compared with $1.573 billion at December 31, 2005. The
increase in securities was primarily due to the SNB acquisition. Securities increased to $1.573 billion at
December 31, 2005 from $1.303 billion at December 31, 2004, an increase of $269.8 million or 20.7%. At
December 31, 2006, securities represented 34.7% of total assets compared with 43.9% of total assets at
December 31, 2005.

rate risk. At December 31, 2006,

The following table summarizes the amortized cost of securities as of the dates shown (available-for-sale

securities are not adjusted for unrealized gains or losses):

December 31,

2006

2005

2004

2003

2002

(Dollars in thousands)

U.S. Treasury securities and obligations of

U.S. government agencies. . . . . . . . . . . . . . .
70% non-taxable preferred stock . . . . . . . . . . .
States and political subdivisions . . . . . . . . . . .
Corporate debt securities . . . . . . . . . . . . . . . . .
Collateralized mortgage obligations . . . . . . . .
Mortgage-backed securities . . . . . . . . . . . . . . .
Qualified Zone Academy Bond (QZAB) . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 402,328
24,000
44,378
6,218
276,629
829,195
8,000
4,093

$ 296,349
24,000
31,250
8,550
222,615
987,088
8,000
814

$

30,726
24,000
37,698
10,491
238,994
957,354
8,000
296

$

48,762
44,015
45,738
15,619
178,487
1,032,861
8,000
283

$ 97,098
44,029
50,994
25,338
168,282
552,515
8,000
—

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,594,841

$1,578,666

$1,307,559

$1,373,765

$946,256

The following table summarizes the contractual maturity of securities and their weighted average yields as
of December 31, 2006. Available-for-sale securities are shown at fair value and held-to-maturity securities are
shown at amortized cost. Other securities are included in the corporate debt securities category. For purposes of
the table below, tax-exempt states and political subdivisions are calculated on a tax equivalent basis. The QZAB
bond is not calculated on a tax equivalent basis and it generates a tax credit of 7.18%, which is included in gross
income.

December 31, 2006

After One Year
but
Within Five
Years

After Five Years
but
Within Ten
Years

Within One
Year

After Ten
Years

Total

Amount Yield Amount Yield Amount Yield Amount Yield

Total

Yield

(Dollars in thousands)

$206,975

4.51% $170,083

5.17% $ —

— % $ 24,476

5.75 % $ 401,534

4.87%

U.S. Treasury securities and

obligations of U.S. government
agencies . . . . . . . . . . . . . . . . . .

70% non-taxable preferred

stock . . . . . . . . . . . . . . . . . . . . .

—

—

—

—

—

—

20,205

6.01

20,205

6.01

States and political
subdivisions.

. . . . . . . . . . . . . .

Corporate debt securities and

3,388

6.06

7,117

5.87

8,348

7.16

26,129

6.82

44,982

6.68

other . . . . . . . . . . . . . . . . . . . . .

7,100

6.67

248

4.70

2,991

7.62

—

—

10,339

6.90

Collateralized mortgage

obligations.

. . . . . . . . . . . . . . .
Mortgage-backed securities . . . . .
Qualified Zone Academy Bond

5 —
5.00

343

2,790
54,388

4.83
4.42

94,422
466,887

4.99
4.36

179,388
307,020

4.56
5.23

276,605
828,638

4.71
4.68

(QZAB) . . . . . . . . . . . . . . . . . .

—

—

8,000

2.00

—

—

—

—

8,000

2.00

Total . . . . . . . . . . . . . . . . . . .

$217,811

4.61% $242,626

5.01% $572,648

4.52% $557,218

5.14% $1,590,303

4.81%

43

The contractual maturity of mortgage-backed securities and collateralized mortgage obligations is not a
reliable indicator of their expected life because borrowers have the right to prepay their obligations at any time.
Mortgage-backed securities monthly pay downs cause the average lives of the securities to be much different
than their stated lives. The weighted average life of the Company’s complete portfolio is 3.2 years with an
effective duration of 2.5 years at December 31, 2006. The 70% non-taxable preferred stock includes investments
in Federal National Mortgage Association (Fannie Mae) and Federal Home Loan Mortgage Corporation (Freddie
Mac) preferred stock.

At December 31, 2006 and 2005, the Company did not own securities of any one issuer (other than the U.S.
government and its agencies) for which aggregate adjusted cost exceeded 10% of the consolidated shareholders’
equity at such respective dates.

At the date of purchase, the Company is required to classify debt and equity securities into one of three
categories: held-to-maturity, trading or available-for-sale. At each reporting date, the appropriateness of the
classification is reassessed. Investments in debt securities are classified as held-to-maturity and measured at
amortized cost in the financial statements only if management has the positive intent and ability to hold those
securities to maturity. Securities that are bought and held principally for the purpose of selling them in the near
term are classified as trading and measured at fair value in the financial statements with unrealized gains and
losses included in earnings. Investments not classified as either held-to-maturity or trading are classified as
available-for-sale and measured at fair value in the financial statements with unrealized gains and losses reported,
net of tax, in a separate component of shareholders’ equity until realized.

The average yield of the securities portfolio was 4.51% in 2006 compared with 4.14% in 2005 and 3.99% in
2004. The 37 basis point increase in 2006 was primarily due to the Company reinvesting funds at higher rates in
2006 compared to 2005. The overall growth in the securities portfolio over the comparable periods was primarily
funded by deposit growth and securities acquired in acquisitions.

The following table summarizes the carrying value by classification of securities as of the dates shown:

2006

2005

2004

2003

2002

December 31,

Available-for-sale . . . . . . . . . .
Held-to-maturity . . . . . . . . . . .

$ 434,331
1,155,972

$ 410,361
1,162,241

(Dollars in thousands)
$ 177,683
1,125,109

$ 263,648
1,113,232

$309,219
641,098

Total . . . . . . . . . . . . . . . .

$1,590,303

$1,572,602

$1,302,792

$1,376,880

$950,317

44

The following tables present the amortized cost and fair value of securities classified as available-for-sale at

December 31, 2006, 2005 and 2004:

Amortized
Cost

December 31, 2006

Gross
Unrealized
Gains

Gross
Unrealized
Losses

(Dollars in thousands)

Fair
Value

Amortized
Cost

December 31, 2005

Gross
Unrealized
Gains

Gross
Unrealized
Losses

(Dollars in thousands)

Fair
Value

U.S. Treasury securities and

obligations of U.S. government
agencies. . . . . . . . . . . . . . . . . . . . .
70% non-taxable preferred stock . . .
States and political subdivisions. . . .
Collateralized mortgage

obligations . . . . . . . . . . . . . . . . . .
Mortgage-backed securities . . . . . . .
Qualified Zone Academy Bond

(QZAB) . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .

Other

$290,629
24,000
14,098

5,352
90,986

8,000
5,804

$—
—
604

12
172

—
28

$ 794
3,795
—

$289,835
20,205
14,702

$231,399
24,000
14,102

$ 430
—
1,005

$1,752
5,334
—

$230,077
18,666
15,107

36
729

—
—

5,328
90,429

8,096
130,014

8,000
5,832

8,000
814

45
277

—
—

34
701

—
—

8,107
129,590

8,000
814

Total.

. . . . . . . . . . . . . . . . . . . .

$438,869

$816

$5,354

$434,331

$416,425

$1,757

$7,821

$410,361

Amortized
Cost

December 31, 2004

Gross
Unrealized
Gains

Gross
Unrealized
Losses

(Dollars in thousands)

Fair
Value

U.S. Treasury securities and

obligations of U.S. government
agencies.

. . . . . . . . . . . . . . . . . . .
70% non-taxable preferred stock . . .
States and political subdivisions . . .
Collateralized mortgage

obligations . . . . . . . . . . . . . . . . . .
. . . . . .

Mortgage-backed securities.
Qualified Zone Academy Bond

(QZAB) . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . .

$ 10,579
24,000
14,382

13,143
112,050

8,000
296

$

2
—
1,366

$

69
6,150
—

$ 10,512
17,850
15,748

76
545

—
—

35
502

—
—

13,184
112,093

8,000
296

Total.

. . . . . . . . . . . . . . . . . . . .

$182,450

$1,989

$6,756

$177,683

45

The following tables present the amortized cost and fair value of securities classified as held-to-maturity at

December 31, 2006, 2005 and 2004:

Amortized
Cost

December 31, 2006

Gross
Unrealized
Gains

Gross
Unrealized
Losses

(Dollars in thousands)

Fair
Value

Amortized
Cost

December 31, 2005

Gross
Unrealized
Gains

Gross
Unrealized
Losses

(Dollars in thousands)

Fair
Value

U.S. Treasury securities and

obligations of U.S.
government agencies. . . . . . . . $ 111,699

$ 405

$

588

$ 111,516 $

64,950

$ 409

$

564

$

64,795

States and political

subdivisions . . . . . . . . . . . . . .
Corporate debt securities . . . . . .
Collateralized mortgage

obligations. . . . . . . . . . . . . . . .
Mortgage-backed securities . . . .

30,280
4,507

271,277
738,209

255
6

337
616

53
10

30,482
4,503

17,148
8,550

5,260
20,584

266,354
718,241

214,519
857,074

173
108

313
721

31
3

5,805
21,868

17,290
8,655

209,027
835,927

Total . . . . . . . . . . . . . . . . . . $1,155,972

$1,619

$26,495

$1,131,096 $1,162,241

$1,724

$28,271

$1,135,694

Amortized
Cost

December 31, 2004

Gross
Unrealized
Gains

Gross
Unrealized
Losses

(Dollars in thousands)

Fair
Value

U.S. Treasury securities and

obligations of U.S.
government agencies. . . . . . . . $

States and political

subdivisions . . . . . . . . . . . . . .
Corporate debt securities . . . . . .
Collateralized mortgage

obligations . . . . . . . . . . . . . . .
. . .

Mortgage-backed securities.

20,147

$ 661

$

6

$

20,802

23,317
10,491

225,851
845,303

510
301

97
3,559

15
—

802
4,914

23,812
10,792

225,146
843,948

Total . . . . . . . . . . . . . . . . . . $1,125,109

$5,128

$5,737

$1,124,500

Management believes that the unrealized losses in the Company’s securities portfolio at December 31, 2006
were primarily due to interest rate increases. Because the decline in market value is attributable to changes in
interest rates and not credit quality, and because the Company has the ability and intent to hold such securities
until a recovery of fair value, which may be at maturity, the Company does not consider such securities to be
other-than-temporarily impaired at December 31, 2006.

Mortgage-backed securities are securities that have been developed by pooling a number of real estate
mortgages and which are principally issued by federal agencies such as Government National Mortgage
Association (Ginnie Mae), Fannie Mae and Freddie Mac. These securities are deemed to have high credit ratings,
and minimum regular monthly cash flows of principal and interest are guaranteed by the issuing agencies.

Unlike U.S. Treasury and U.S. government agency securities, which have a lump sum payment at maturity,
mortgage-backed securities provide cash flows from regular principal and interest payments and principal
prepayments throughout
the lives of the securities. Mortgage-backed securities which are purchased at a
premium will generally suffer decreasing net yields as interest rates drop because home owners tend to refinance
their mortgages. Thus, the premium paid must be amortized over a shorter period. Therefore, these securities
purchased at a discount will obtain higher net yields in a decreasing interest rate environment. As interest rates
rise, the opposite will generally be true. During a period of increasing interest rates, fixed rate mortgage-backed
securities do not tend to experience heavy prepayments of principal and consequently, the average life of this
security will not be shortened. If interest rates begin to fall, prepayments will increase. At December 31, 2006,

46

37.1% of the mortgage-backed securities held by the Company had contractual final maturities of more than ten
years with a weighted average life of 3.58 years.

Collateralized mortgage obligations (“CMOs”) are bonds that are backed by pools of mortgages. The pools
can be Ginnie Mae, Fannie Mae or Freddie Mac pools or they can be private-label pools. CMOs are designed so
that the mortgage collateral will generate a cash flow sufficient to provide for the timely repayment of the bonds.
The mortgage collateral pool can be structured to accommodate various desired bond repayment schedules,
provided that the collateral cash flow is adequate to meet scheduled bond payments. This is accomplished by
dividing the bonds into classes to which payments on the underlying mortgage pools are allocated in different
order. The bond’s cash flow, for example can be dedicated to one class of bondholders at a time, thereby
increasing call protection to bondholders. In private-label CMOs, losses on underlying mortgages are directed to
the most junior of all classes and then to the classes above in order of increasing seniority, which means that the
senior classes have enough credit protection to be given the highest credit rating by the rating agencies.

Deposits

The Company’s lending and investment activities are primarily funded by deposits. The Company offers a
variety of deposit accounts having a wide range of interest rates and terms including demand, savings, money
market and time accounts. The Company relies primarily on competitive pricing policies and customer service to
attract and retain these deposits. The Company does not have or accept any brokered deposits.

Total deposits at December 31, 2006 were $3.726 billion, an increase of $805.4 million or 27.6% compared
with $2.920 billion at December 31, 2005. The increase was primarily attributable to the SNB acquisition in
2006. As of December 31, 2006, the banking centers acquired in 2006 had approximately $728.5 million in total
deposits. Noninterest-bearing deposits were $835.9 million at December 31, 2006, an increase of $161.5 million
or 23.9% compared with $674.4 million at December 31, 2005. Noninterest-bearing deposits at December 31,
2005 were $674.4 million compared with $518.4 million at December 31, 2004. Interest-bearing deposits at
December 31, 2006 were $2.89 billion, up $643.9 million or 28.7% compared with $2.25 billion at December 31,
2005. Interest-bearing deposits at December 31, 2005 of $2.25 billion represented a $447.2 million or 24.9%
increase compared with $1.80 billion at December 31, 2004. Total deposits at December 31, 2004 were
$2.317 billion. There were no major concentrations of deposits at December 31, 2006, 2005 or 2004.

The daily average balances and weighted average rates paid on deposits for each of the years ended

December 31, 2006, 2005 and 2004 are presented below:

Years Ended December 31,

2006

2005

2004

Amount

Rate

Amount

Rate

Amount

Rate

(Dollars in thousands)

Interest-bearing checking . . . . . . . . . . . . . . . . . .
Regular savings . . . . . . . . . . . . . . . . . . . . . . . . . .
Money market savings . . . . . . . . . . . . . . . . . . . .
Time deposits . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 602,946
164,963
732,704
1,165,056

1.90% $ 477,199
150,577
1.11
545,660
2.96
1,009,147
3.95

0.98% $ 485,557
110,801
0.83
384,529
1.73
735,095
2.80

1.04%
0.59
0.87
2.12

Total interest-bearing deposits . . . . . . . . . .
Noninterest-bearing deposits . . . . . . . . . . . . . . .

2,665,669

3.04

2,182,583

2.00

1,715,982

1.43

783,431 —

609,230 —

473,713 —

Total deposits . . . . . . . . . . . . . . . . . . . . . . .

$3,449,100

2.35% $2,791,813

1.56% $2,189,695

1.12%

The Company’s ratio of average noninterest-bearing deposits to average total deposits for the years ended

December 31, 2006, 2005, and 2004 was 22.7%, 21.8%, and 21.6%, respectively.

47

The following table sets forth the amount of the Company’s certificates of deposit that are $100,000 or

greater by time remaining until maturity:

Three months or less . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over three through six months. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over six through 12 months . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Over 12 months . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31, 2006

(Dollars in thousands)
$198,330
132,795
142,893
100,275

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$574,293

Other Borrowings

The Company utilizes borrowings to supplement deposits to fund its lending and investment activities.
Borrowings consist of funds from the Federal Home Loan Bank (“FHLB”) and correspondent banks. FHLB
advances are considered short-term, overnight borrowings. At December 31, 2006,
the Company had
$26.4 million in FHLB borrowings all of which consisted of long-term FHLB notes payable compared with
$55.4 million in FHLB borrowings at December 31, 2005, of which $38.4 million were long-term FHLB notes
payable and $17.0 million were overnight advances. The $29.0 million decrease was primarily attributable to the
payoff of the FHLB advances of $17.0 million and normal pay downs on the remaining notes. The weighted
average interest rate paid on the FHLB advances at period end was 5.4%. The maturity dates on the FHLB notes
payable range from the years 2007 to 2028 and have interest rates ranging from 3.32% to 6.48%. The highest
outstanding balance of FHLB advances during 2006 was $116.0 million compared with $39.0 million during
2005. The Company had no federal funds purchased at December 31, 2006 or 2005.

At December 31, 2006, the Company had $47.2 million in securities sold under repurchase agreements
compared with $47.0 million at December 31, 2005, an increase of $240,000 or 0.5%. The increase was primarily
attributable to normal customer activity.

At December 31, 2006 and 2005,

the Company had outstanding $100.5 million and $75.8 million,
respectively, in junior subordinated debentures issued to the Company’s unconsolidated subsidiary trusts. The
increase of $24.7 million was due to the Company’s assumption of $30.9 million in junior subordinated
debentures issued by SNB to its three subsidiary trusts, partially offset by the redemption of $6.2 million in
junior subordinated debentures issued to Paradigm Capital Trust II on February 28, 2006.

A summary of pertinent information related to the Company’s eight issues of junior subordinated debentures

outstanding at December 31, 2006 is set forth in the table below:

Description

Issuance Date

Trust
Preferred
Securities
Outstanding

Prosperity Statutory Trust II

. . . . . . . . .

July 31, 2001

$15,000,000

Prosperity Statutory Trust III . . . . . . . . . Aug. 15, 2003
Prosperity Statutory Trust IV . . . . . . . . . Dec. 30, 2003
First Capital Statutory Trust I(5) . . . . . . . Mar. 26, 2002

12,500,000
12,500,000
20,000,000

First Capital Statutory Trust II(5)

. . . . . . Sept. 26, 2002

7,500,000

SNB Statutory Trust II(6)

. . . . . . . . . . . . Mar. 26, 2003

10,000,000

SNB Capital Trust III(6)

. . . . . . . . . . . . . Mar. 27, 2003

10,000,000

SNB Capital Trust IV(6)

. . . . . . . . . . . . . Sept. 25, 2003

10,000,000

Junior
Subordinated
Debt Owed
to Trusts

Maturity
Date(2)

$15,464,000

July 31, 2031

12,887,000
Sept. 17, 2033
12,887,000 Dec. 30, 2033
20,619,000 Mar. 26, 2032

7,732,000

Sept. 26, 2032

10,310,000 Mar. 26, 2033

10,310,000 Mar. 27, 2033

10,310,000

Sept. 25, 2033

Interest Rate(1)

3-month LIBOR
+ 3.58%, not to
exceed 12.50%
6.50%(3)
6.50%(4)
3-month LIBOR
+ 3.60%
3-month LIBOR
+ 3.40%
3-month LIBOR
+ 3.15%
3-month LIBOR
+ 3.15%
3-month LIBOR
+ 3.00%

48

(1) The 3-month LIBOR in effect as of December 31, 2006 was 5.36%.
(2) The debentures are callable five years from issuance date.
(3) The debentures bear a fixed interest rate until September 17, 2008, when the rate begins to float on a quarterly basis

based on the three-month LIBOR plus 3.00%.

(4) The debentures bear a fixed interest rate until December 30, 2008, when the rate begins to float on a quarterly basis

based on the three-month LIBOR plus 2.85%.

(5) Assumed in connection with the First Capital acquisition on March 1, 2005.
(6) Assumed in connection with the SNB acquisition on April 1, 2006.

Each of the trusts is a capital or statutory business trust organized for the sole purpose of issuing trust
securities and investing the proceeds in the Company’s junior subordinated debentures. The preferred trust
securities of each trust represent preferred beneficial interests in the assets of the respective trusts and are subject
to mandatory redemption upon payment of the junior subordinated debentures held by the trust. The common
securities of each trust are wholly-owned by the Company. Each trust’s ability to pay amounts due on the trust
preferred securities is solely dependent upon the Company making payment on the related junior subordinated
debentures. The debentures, which are the only assets of each trust, are subordinate and junior in right of
payment
to all of the Company’s present and future senior indebtedness. The Company has fully and
unconditionally guaranteed each trust’s obligations under the trust securities issued by such trust to the extent not
paid or made by each trust, provided such trust has funds available for such obligations.

Under the provisions of each issue of the debentures, the Company has the right to defer payment of interest
on the debentures at any time, or from time to time, for periods not exceeding five years. If interest payments on
either issue of the debentures are deferred, the distributions on the applicable trust preferred securities and
common securities will also be deferred.

Interest Rate Sensitivity and Market Risk

The Company’s asset liability and funds management policy provides management with the necessary
guidelines for effective funds management, and the Company has established a measurement system for
monitoring its net interest rate sensitivity position. The Company manages its sensitivity position within
established guidelines.

As a financial institution, the Company’s primary component of market risk is interest rate volatility.
Fluctuations in interest rates will ultimately impact both the level of income and expense recorded on most of the
Company’s assets and liabilities, and the market value of all
interest-earning assets and interest-bearing
liabilities, other than those which have a short term to maturity. Interest rate risk is the potential of economic
losses due to future interest rate changes. These economic losses can be reflected as a loss of future net interest
income and/or a loss of current fair market values. The objective is to measure the effect on net interest income
and to adjust the balance sheet to minimize the inherent risk while at the same time maximizing income.

The Company manages its exposure to interest rates by structuring its balance sheet in the ordinary course
of business. The Company does not enter into instruments such as leveraged derivatives, interest rate swaps,
financial options, financial future contracts or forward delivery contracts for the purpose of reducing interest rate
risk. Based upon the nature of the Company’s operations, the Company is not subject to foreign exchange or
commodity price risk. The Company does not own any trading assets.

The Company’s exposure to interest rate risk is managed by the Asset Liability Committee (“ALCO”),
which is composed of senior officers of the Company, in accordance with policies approved by the Company’s
Board of Directors. The ALCO formulates strategies based on appropriate levels of interest rate risk. In
determining the appropriate level of interest rate risk, the ALCO considers the impact on earnings and capital of
the current outlook on interest rates, potential changes in interest rates, regional economies, liquidity, business
strategies and other factors. The ALCO meets regularly to review, among other things, the sensitivity of assets

49

and liabilities to interest rate changes, the book and market values of assets and liabilities, unrealized gains and
losses, purchase and sale activities, commitments to originate loans and the maturities of investments and
borrowings. Additionally, the ALCO reviews liquidity, cash flow flexibility, maturities of deposits and consumer
and commercial deposit activity. Management uses two methodologies to manage interest rate risk: (1) an
analysis of relationships between interest-earning assets and interest-bearing liabilities; and (2) an interest rate
shock simulation model. The Company has traditionally managed its business to reduce its overall exposure to
changes in interest rates.

An interest rate sensitive asset or liability is one that, within a defined time period, either matures or
experiences an interest rate change in line with general market interest rates. The management of interest rate risk
is performed by analyzing the maturity and repricing relationships between interest-earning assets and interest-
bearing liabilities at specific points in time (“GAP”) and by analyzing the effects of interest rate changes on net
interest income over specific periods of time by projecting the performance of the mix of assets and liabilities in
varied interest rate environments. Interest rate sensitivity reflects the potential effect on net interest income of a
movement in interest rates. A company is considered to be asset sensitive, or having a positive GAP, when the
amount of its interest-earning assets maturing or repricing within a given period exceeds the amount of its
interest-bearing liabilities also maturing or repricing within that
time period. Conversely, a company is
considered to be liability sensitive, or having a negative GAP, when the amount of its interest-bearing liabilities
maturing or repricing within a given period exceeds the amount of its interest-earning assets also maturing or
repricing within that time period. During a period of rising interest rates, a negative GAP would tend to affect net
interest income adversely, while a positive GAP would tend to result in an increase in net interest income. During
a period of falling interest rates, a negative GAP would tend to result in an increase in net interest income, while
a positive GAP would tend to affect net interest income adversely.

The following table sets forth the Company’s interest rate sensitivity analysis at December 31, 2006:

Volumes Subject to Repricing Within

0-30
days

31-180
days

181-365
days

Greater than
one year

Total

(Dollars in thousands)

Interest-earning assets:

Securities (excluding unrealized loss of

$4.5 million) . . . . . . . . . . . . . . . . . . . $ 110,410
769,377

Loans held for investment . . . . . . . . . . .
Federal funds sold and other temporary
investments . . . . . . . . . . . . . . . . . . . .

$

195,835
172,355

$

221,583
151,299

$1,067,013 $1,594,841
2,176,507
1,083,476

153,643

100

297

—

154,040

Total interest-earning assets . . . $1,033,430

$

368,290

$

373,179

$2,150,489 $3,925,388

Interest-bearing liabilities:

Demand, money market and savings

deposits . . . . . . . . . . . . . . . . . . . . . . . $1,731,149

$

— $

— $

— $1,731,149

Certificates of deposit and other time

deposits. . . . . . . . . . . . . . . . . . . . . . . .
Junior subordinated debentures . . . . . . .
Securities sold under repurchase

agreements . . . . . . . . . . . . . . . . . . . . .
Other borrowings . . . . . . . . . . . . . . . . . .

149,926
74,939

47,225
—

466,988
—

309,945
—

231,794
25,580

1,158,653
100,519

—
380

—
5,449

—
20,579

47,225
26,408

Total interest-bearing liabilities . . . . $2,003,239

$

467,368

$

315,394

$ 277,953 $3,063,954

Period GAP . . . . . . . . . . . . . . . . . . . . $ (969,809) $
Cumulative GAP . . . . . . . . . . . . . . . . $ (969,809) $(1,068,887) $(1,011,102) $ 861,434
(21.14)%
Period GAP to total assets . . . . . . . . .
(21.14)%
Cumulative GAP to total assets . . . . .

1.26%
(22.04)%

(2.16)%
(23.30)%

(99,078) $

40.82%
18.78%

57,785

$1,872,536 $ 861,434

50

While the GAP position is a useful tool in measuring interest rate risk and contributes toward effective asset
and liability management, it is difficult to predict the effect of changing interest rates solely on that measure,
without accounting for alterations in the maturity or repricing characteristics of the balance sheet that occur
during changes in market interest rates. For example, the GAP position reflects only the prepayment assumptions
pertaining to the current rate environment. Assets tend to prepay more rapidly during periods of declining interest
rates than during periods of rising interest rates. Because of this and other risk factors not contemplated by the
GAP position, an institution could have a matched GAP position in the current rate environment and still have its
net interest income exposed to increased rate risk. Additionally, the Company had $835.9 million in noninterest-
bearing deposits at December 31, 2006 which are not reflected in the table above and are not directly impacted
by interest rate changes.

In addition to GAP analysis, the Company uses an interest rate risk simulation model and shock analysis to
test the interest rate sensitivity of net interest income and the balance sheet, respectively. Contractual maturities
and repricing opportunities of loans are incorporated in the model as are prepayment assumptions, maturity data
and call options within the investment portfolio. Assumptions based on past experience are incorporated into the
model for nonmaturity deposit accounts. The Company’s simulation analysis as of December 31, 2006 estimates
a percentage of change in these metrics from the stable rate base scenario versus alternative scenarios of rising
interest rates by instantaneously shocking a static balance sheet. The following table
and falling market
summarizes the simulated change in net interest income over a 12-month horizon in the event of an immediate
change in interest rates:

Change in Interest
Rates (Basis Points)

Increase (Decrease)
in Net Interest Income

+200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+100.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2%
3.2%
0.0%
2.1%
(0.4)%

The results are primarily due to behavior of demand, money market and savings deposits during such rate
fluctuations. The Company has found that historically, interest rates on these deposits change more slowly than
changes in the discount and federal funds rates. This assumption is incorporated into the simulation model and is
generally not fully reflected in a GAP analysis.

Liquidity

Liquidity involves the Company’s ability to raise funds to support asset growth or reduce assets to meet
deposit withdrawals and other payment obligations, to maintain reserve requirements and otherwise to operate
the Company on an ongoing basis. During the three years ended December 31, 2006, the Company’s liquidity
needs have primarily been met by growth in core deposits and the issuance of junior subordinated debentures, as
previously discussed. Although access to purchased funds from correspondent banks is available and has been
utilized on occasion to take advantage of investment opportunities, the Company does not generally rely on these
external funding sources. The cash and federal funds sold position, supplemented by amortizing investment and
loan portfolios, have generally created an adequate liquidity position.

Asset liquidity is provided by cash and assets which are readily marketable or which will mature in the near
future. As of December 31, 2006, the Company had cash and cash equivalents of $269.7 million compared with
$97.4 million at December 31, 2005. The increase was mainly due to an increase in federal funds sold of
$147.8 million and an increase in cash and due from banks of $24.6 million.

51

Contractual Obligations

The following table summarizes the Company’s contractual obligations and other commitments to make
future payments as of December 31, 2006 (other than deposit obligations). The Company’s future cash payments
associated with its contractual obligations pursuant to its junior subordinated debentures, FHLB notes payable
and operating leases as of December 31, 2006 are summarized below. Payments for FHLB notes payable does
not include interest of $6.6 million that will be paid over the future periods. Payments related to leases are based
on actual payments specified in underlying contracts.

Payments due in:

More than 1
year but less
than 3 years

3 years or
more but less
than 5 years

1 year or less

5 years
or more

Total

Junior subordinated debentures . . . . . . . . . . . . . .
Federal Home Loan Bank notes payable . . . . . . .
Operating leases . . . . . . . . . . . . . . . . . . . . . . . . . .

$ —
7,620
2,885

(Dollars in thousands)
$ —
10,555
2,404

$ —
1,496
4,231

$100,519
6,737
2,269

$100,519
26,408
11,789

Total.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$10,505

$5,727

$12,959

$109,525

$138,716

Off-Balance Sheet Items

In the normal course of business, the Company enters into various transactions, which, in accordance with
accounting principles generally accepted in the United States, are not included in its consolidated balance sheets.
The Company enters into these transactions to meet the financing needs of its customers. These transactions
include commitments to extend credit and standby letters of credit, which involve, to varying degrees, elements
of credit risk and interest rate risk in excess of the amounts recognized in the consolidated balance sheets.

The Company’s commitments associated with outstanding standby letters of credit and commitments to
extend credit expiring by period as of December 31, 2006 are summarized below. Since commitments associated
with letters of credit and commitments to extend credit may expire unused, the amounts shown do not necessarily
reflect the actual future cash funding requirements:

1 year or less

More than 1
year but less
than 3 years

3 years or
more but less
than 5 years

(Dollars in thousands)

5 years
or more

Total

Standby letters of credit . . . . . . . . . . . . . . . . . . . . .
Commitments to extend credit . . . . . . . . . . . . . . . .

$

8,257
343,613

$ 1,439
68,971

Total.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$351,870

$70,410

$ —
7,699

$7,699

$ — $
89,493

9,696
509,776

$89,493

$519,472

Standby Letters of Credit. Standby letters of credit are written conditional commitments issued by the
Company to guarantee the performance of a customer to a third party. In the event the customer does not perform
in accordance with the terms of the agreement with the third party, the Company would be required to fund the
commitment. The maximum potential amount of future payments the Company could be required to make is
represented by the contractual amount of the commitment. If the commitment is funded, the Company would be
entitled to seek recovery from the customer. The Company’s policies generally require that standby letter of
credit arrangements contain security and debt covenants similar to those contained in loan agreements.

Commitments to Extend Credit. The Company enters into contractual commitments to extend credit,
normally with fixed expiration dates or termination clauses, at specified rates and for specific purposes.
Substantially all of the Company’s commitments to extend credit are contingent upon customers maintaining
specific credit standards at the time of loan funding. The Company minimizes its exposure to loss under these
commitments by subjecting them to credit approval and monitoring procedures. Management assesses the credit
risk associated with certain commitments to extend credit in determining the level of the allowance for credit
losses.

52

Capital Resources

Capital management consists of providing equity to support the Company’s current and future operations.
The Company is subject to capital adequacy requirements imposed by the Federal Reserve Board and the Bank is
subject to capital adequacy requirements imposed by the FDIC. Both the Federal Reserve Board and the FDIC
have adopted risk-based capital requirements for assessing bank holding company and bank capital adequacy.
These standards define capital and establish minimum capital requirements in relation to assets and off-balance
sheet exposure, adjusted for credit risk. The risk-based capital standards currently in effect are designed to make
regulatory capital requirements more sensitive to differences in risk profiles among bank holding companies and
banks, to account for off-balance sheet exposure and to minimize disincentives for holding liquid assets. Assets
and off-balance sheet items are assigned to broad risk categories, each with appropriate relative risk weights. The
resulting capital ratios represent capital as a percentage of total risk-weighted assets and off-balance sheet items.

The risk-based capital standards issued by the Federal Reserve Board require all bank holding companies to
have “Tier 1 capital” of at least 4.0% and “total risk-based” capital (Tier 1 and Tier 2) of at least 8.0% of total
risk-weighted tangible assets. “Tier 1 capital” generally includes common shareholders’ equity and qualifying
perpetual preferred stock together with related surpluses and retained earnings, less deductions for goodwill and
various other intangibles. “Tier 2 capital” may consist of a limited amount of intermediate-term preferred stock, a
limited amount of term subordinated debt, certain hybrid capital instruments and other debt securities, perpetual
preferred stock not qualifying as Tier 1 capital, and a limited amount of the general valuation allowance for loan
losses. The sum of Tier 1 capital and Tier 2 capital is “total risk-based capital.”

The Federal Reserve Board has also adopted guidelines which supplement the risk-based capital guidelines
with a minimum ratio of Tier 1 capital to average total consolidated tangible assets, or “leverage ratio,” of 3.0%
for institutions with well diversified risk, including no undue interest rate exposure; excellent asset quality; high
liquidity; good earnings; and that are generally considered to be strong banking organizations, rated composite 1
under applicable federal guidelines, and that are not experiencing or anticipating significant growth. Other
banking organizations are required to maintain a leverage ratio of at least 4.0%. These rules further provide that
banking organizations experiencing internal growth or making acquisitions will be expected to maintain capital
positions substantially above the minimum supervisory levels and comparable to peer group averages, without
significant reliance on intangible assets.

Pursuant to FDICIA, each federal banking agency revised its risk-based capital standards to ensure that
those standards take adequate account of interest rate risk, concentration of credit risk and the risks of
nontraditional activities, as well as reflect the actual performance and expected risk of loss on multifamily
mortgages. The Bank is subject to capital adequacy guidelines of the FDIC that are substantially similar to the
Federal Reserve Board’s guidelines. Also pursuant to FDICIA, the FDIC has promulgated regulations setting the
levels at which an insured institution such as the Bank would be considered “well-capitalized,” “adequately
capitalized,” “undercapitalized,” “significantly undercapitalized” and “critically undercapitalized.” Under the
FDIC’s regulations, the Bank is classified “well-capitalized” for purposes of prompt corrective action.

Total shareholders’ equity increased to $664.4 million at December 31, 2006 compared with $464.7 million
at December 31, 2005, an increase of $199.7 million or 43.0%. This increase was primarily the result of net
income of $61.7 million and an of $141.4 million in common stock issued in connection with the SNB
acquisition, partially offset by dividends paid on the Common Stock of $13.0 million. During 2005, shareholders’
equity increased by $189.1 million or 68.6% compared with $275.6 million at December 31, 2004, primarily due
to net income of $47.9 million and $149.6 million in common stock issued in connection with the First Capital
and Grapeland acquisitions, partially offset by dividends paid on the Common Stock of $9.6 million.

53

The following table provides a comparison of the Company’s and the Bank’s leverage and risk-weighted

capital ratios as of December 31, 2006 to the minimum and well-capitalized regulatory standards:

Minimum Required
for Capital
Adequacy Purposes

To Be Categorized as
Well-Capitalized Under Prompt
Corrective Action
Provisions

Actual Ratio at
December 31, 2006

The Company

Leverage ratio.
. . . . . . . . . . . . . . . . . . .
Tier 1 risk-based capital ratio . . . . . . . .
. . . . . . . .
Total risk-based capital ratio.

The Bank

Leverage ratio.
. . . . . . . . . . . . . . . . . . .
Tier 1 risk-based capital ratio . . . . . . . .
. . . . . . . .
Total risk-based capital ratio.

3.00%(1)
4.00
8.00

3.00%(2)
4.00
8.00

N/A
N/A
N/A

5.00%
6.00
10.00

7.76%
13.52
14.55

7.61%
13.28
14.31

(1) The Federal Reserve Board may require the Company to maintain a leverage ratio above the required

minimum.

(2) The FDIC may require the Bank to maintain a leverage ratio above the required minimum.

The trust preferred securities issued by the Company’s subsidiary trusts are currently included in the
Company’s Tier 1 capital for regulatory purposes. On March 1, 2005, the Federal Reserve Board adopted final
rules that continue to allow trust preferred securities to be included in Tier 1 capital, subject to stricter
quantitative and qualitative limits. Currently, trust preferred securities and qualifying perpetual preferred stock
are limited in the aggregate to no more than 25% of a bank holding company’s core capital elements. The new
rule amends the existing limit by providing that restricted core capital elements (including trust preferred
securities and qualifying perpetual preferred stock) can be no more than 25% of core capital, net of goodwill and
associated deferred tax liability. Because the 25% limit currently is calculated without deducting goodwill, the
final rule reduces the amount of trust preferred securities that the Company can include in Tier 1 capital. The
amount of such excess trust preferred securities are includable in Tier 2 capital. The new quantitative limits will
be fully effective March 31, 2009.

Assuming these final rules were effective at December 31, 2006, approximately $73.3 million of trust
preferred securities would count as Tier 1 capital. The excess amount of trust preferred securities may be
included in Tier 2 capital. Assuming these final rules were effective at December 31, 2006, the Company’s
consolidated capital ratios would have been:

Pro forma Consolidated Risk Based Capital Ratios:
Total capital (to risk weighted assets) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tier 1 capital (to risk weighted assets) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14.55%
12.49%
7.16%

Each of the trusts issuing the trust preferred securities holds junior subordinated debentures the Company
issued with a 30-year maturity. The final rules provide that in the last five years before the junior subordinated
debentures mature, the associated trust preferred securities will be excluded from Tier 1 capital and included in
Tier 2 capital. In addition, the trust preferred securities during this five-year period would be amortized out of
Tier 2 capital by one-fifth each year and excluded from Tier 2 capital completely during the year prior to
maturity of the debentures.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

For

information regarding the market

instruments, see Item 7.
Management’s Discussion and Analysis of Financial Condition and Results of Operation—Financial Condition—
Interest Rate Sensitivity and Market Risk. The Company’s principal market risk exposure is to changes in
interest rates.

the Company’s financial

risk of

54

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The financial statements, the report thereon, the notes thereto and supplementary data commence at page 65

of this Annual Report on Form 10-K.

The following table presents certain unaudited quarterly financial information concerning the Company’s
results of operations for each of the two years indicated below. The information should be read in conjunction
with the historical consolidated financial statements of the Company and the notes thereto appearing elsewhere in
this Annual Report on Form 10-K.

CONSOLIDATED QUARTERLY FINANCIAL DATA OF THE COMPANY

Quarter Ended 2006

December 31

September 30

June 30 March 31

(Dollars in thousands, except per share data)
(unaudited)

Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$62,893
26,487

$62,150
26,183

$61,012
24,430

$45,684
16,494

Net interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for credit losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net interest income after provision . . . . . . . . . . . . . . . . . . .
Noninterest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noninterest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36,406
144

36,262
8,241
19,192

25,311
8,709

35,967
120

35,847
8,918
19,829

24,936
8,572

36,582
120

36,462
9,156
21,399

24,219
8,324

29,190
120

29,070
7,667
17,249

19,488
6,624

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$16,602

$16,364

$15,895

$12,864

Earnings per share(1):

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

0.51

0.50

$

$

0.50

0.49

$

$

0.49

0.48

$

$

0.46

0.46

Quarter Ended 2005

December 31

September 30

June 30 March 31

(Dollars in thousands, except per share data)
(unaudited)

Interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$44,277
15,256

$42,707
13,787

$41,106
12,627

$34,033
9,556

Net interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for credit losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net interest income after provision . . . . . . . . . . . . . . . . . . .
Noninterest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Noninterest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Income before income taxes . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for income taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

29,021
120

28,901
7,515
17,241

19,175
6,548

28,920
120

28,800
8,092
18,070

18,822
6,351

28,479
120

28,359
7,881
17,812

18,428
6,220

24,477
120

24,357
6,533
15,834

15,056
4,502

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$12,627

$12,471

$12,208

$10,554

Earnings per share(1):

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

0.46

0.45

$

$

0.45

0.45

$

$

0.44

0.44

$

$

0.44

0.43

(1) Earnings per share are computed independently for each of the quarters presented and therefore may not

total earnings per share for the year.

55

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND

FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

Evaluation of disclosure controls and procedures. As of the end of the period covered by this report, the
Company carried out an evaluation, under the supervision and with the participation of its management,
including its Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and
operation of its disclosure controls and procedures. In designing and evaluating the disclosure controls and
procedures, management recognizes that any controls and procedures, no matter how well designed and operated,
can provide only reasonable assurance of achieving the desired control objectives, and management was required
to apply judgment in evaluating its controls and procedures. Based on this evaluation, the Company’s Chief
Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures
(as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”))
were effective as of the end of the period covered by this report.

Changes in internal control over financial reporting. There were no changes in the Company’s internal
control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that
occurred during the quarter ended December 31, 2006, that have materially affected, or are reasonably likely to
materially affect, the Company’s internal control over financial reporting.

56

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

The management of the Company is responsible for establishing and maintaining adequate internal control
over financial reporting. The Company’s internal control over financial reporting is a process designed under the
supervision of the Company’s Chief Executive Officer and Chief Financial Officer to provide reasonable
assurance regarding the reliability of financial reporting and the preparation of the Company’s financial
statements for external purposes in accordance with generally accepted accounting principles.

As of December 31, 2006, management assessed the effectiveness of the Company’s internal control over
financial reporting based on the criteria for effective internal control over financial reporting established in
“Internal Control--Integrated Framework,” issued by the Committee of Sponsoring Organizations (“COSO”) of
the Treadway Commission. This assessment included controls over the preparation of the schedules equivalent to
the basic financial statements in accordance with the instructions for the Consolidated Financial Statements for
Bank Holding Companies (Form FR Y-9C) to meet the reporting requirements of Section 112 of the Federal
Deposit Insurance Corporation Improvement Act. Based on the assessment, management determined that the
Company maintained effective internal control over financial reporting as of December 31, 2006, based on those
criteria.

Deloitte & Touche LLP the independent registered public accounting firm that audited the consolidated
financial statements of the Company included in this Annual Report on Form 10-K, has issued an attestation
report on management’s assessment of the effectiveness of the Company’s internal control over financial
reporting as of December 31, 2006. The report is included in this Item under the heading “Report of Independent
Registered Public Accounting Firm.”

Compliance with Designated Laws and Regulations

Management is also responsible for ensuring compliance with the federal laws and regulations concerning
loans to insiders and the federal and state laws and regulations concerning dividend restrictions, both of which
are designated by the Federal Deposit Insurance Corporation (FDIC) as safety and soundness laws and
regulations.

Management assessed its compliance with the designated safety and soundness laws and regulations and has
maintained records of its determinations and assessments as required by the FDIC. Based on this assessment,
management believes that the Company has complied, in all material respects, with the designated safety and
soundness laws and regulations for the year ended December 31, 2006.

57

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of
Prosperity Bancshares, Inc.
Houston, Texas

We have audited management’s assessment, included in the accompanying Management’s Report on
Internal Control over Financial Reporting, that Prosperity Bancshares, Inc. and subsidiaries (the “Company”)
maintained effective internal control over financial reporting as of December 31, 2006, based on criteria
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of
the Treadway Commission. Because management’s assessment and our audit were conducted to meet the
reporting requirements of Section 112 of the Federal Deposit Insurance Corporation Improvement Act (FDICIA),
management’s assessment and our audit of the Company’s internal control over financial reporting included
controls over the preparation of the schedules equivalent to the basic financial statements in accordance with the
instructions for the Consolidated Financial Statements for Bank Holding Companies (Form FR Y-9C). The
Company’s management is responsible for maintaining effective internal control over financial reporting and for
its assessment of the effectiveness of internal control over financial reporting. Our responsibility is to express an
opinion on management’s assessment and an opinion on the effectiveness of the Company’s internal control over
financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight
Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance
about whether effective internal control over financial reporting was maintained in all material respects. Our
audit included obtaining an understanding of internal control over financial reporting, evaluating management’s
assessment, testing, and evaluating the design and operating effectiveness of internal control, and performing
such other procedures as we considered necessary in the circumstances. We believe that our audit provides a
reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed by, or under the supervision of,
the company’s principal executive and principal financial officers, or persons performing similar functions, and
effected by the company’s board of directors, management, and other personnel to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles. A company’s internal control over financial reporting
includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail,
accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable
assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance
with generally accepted accounting principles, and that receipts and expenditures of the company are being made
only in accordance with authorizations of management and directors of the company; and (3) provide reasonable
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the
company’s assets that could have a material effect on the financial statements.

Because of the inherent limitations of internal control over financial reporting, including the possibility of
collusion or improper management override of controls, material misstatements due to error or fraud may not be
prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal
control over financial reporting to future periods are subject to the risk that the controls may become inadequate
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, management’s assessment that the Company maintained effective internal control over
financial reporting as of December 31, 2006, is fairly stated, in all material respects, based on the criteria
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of
the Treadway Commission. Also, in our opinion, the Company maintained, in all material respects, effective
internal control over financial reporting as of December 31, 2006, based on the criteria established in Internal
Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway
Commission.

58

We have not examined and, accordingly, we do not express an opinion or any other form of assurance on

management’s statement referring to compliance with laws and regulations.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board
(United States), the consolidated financial statements as of and for the year ended December 31, 2006 of the
Company and our report dated February 27, 2007, expressed an unqualified opinion on those financial
statements.

Houston, Texas
February 27, 2007

ITEM 9B. OTHER INFORMATION

None.

PART III.

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by this Item is incorporated herein by reference to the information under the
captions “Election of Directors,” “Continuing Directors and Executive Officers,” “ Section 16(a) Beneficial
Ownership Reporting Compliance,” “Corporate Governance and Nominating Procedures—Committees of the
Board of Directors—Audit Committee,” “Corporate Governance and Nominating Procedures—Director
Nomination Process” and “Corporate Governance and Nominating Procedures—Code of Ethics” in the
Company’s definitive Proxy Statement for its 2007 Annual Meeting of Shareholders (the “2007 Proxy
Statement”) to be filed with the Commission pursuant to Regulation 14A under the Exchange Act within 120
days of the Company’s fiscal year end.

ITEM 11. EXECUTIVE COMPENSATION

The information required by this Item is incorporated herein by reference to the information under the
captions “Executive Compensation and Other Matters” and “Director Compensation” in the 2007 Proxy
Statement.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

AND RELATED SHAREHOLDER MATTERS

Certain information required by this Item 12 is included under “Securities Authorized for Issuance under
Equity Compensation Plans” in Part II, Item 5 of this annual report on Form 10-K. The other information
required by this Item is incorporated herein by reference to the information under the caption “Beneficial
Ownership of Common Stock by Management of the Company and Principal Shareholders” in the 2007 Proxy
Statement.

ITEM 13. CERTAIN RELATIONSHIPS, RELATED TRANSACTIONS AND DIRECTOR

INDEPENDENCE

The information required by this Item is incorporated herein by reference to the information under the
captions “Corporate Governance and Nominating Procedures—Director Independence” and “Interests of
Management and Others in Certain Transactions” in the 2007 Proxy Statement.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this Item is incorporated herein by reference to the information under the

caption “Fees and Services of Independent Registered Public Accounting Firm” in the 2007 Proxy Statement.

59

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

Consolidated Financial Statements and Schedules

PART IV.

Reference is made to the Consolidated Financial Statements, the report thereon and the notes thereto
commencing at page 65 of this Annual Report on Form 10-K. Set forth below is a list of such Consolidated
Financial Statements:

Report of Independent Registered Public Accounting Firm
Consolidated Balance Sheets as of December 31, 2006 and 2005
Consolidated Statements of Income for the Years Ended December 31, 2006, 2005 and 2004
Consolidated Statements of Changes in Shareholders’ Equity for the Years Ended December 31, 2006, 2005
and 2004
Consolidated Statements of Cash Flows for the Years Ended December 31, 2006, 2005 and 2004
Notes to Consolidated Financial Statements

Financial Statement Schedules

All supplemental schedules are omitted as inapplicable or because the required information is included in

the Consolidated Financial Statements or notes thereto.

Exhibits

Each exhibit marked with an asterisk is filed or furnished with this Annual Report on Form 10-K as noted

below.

Exhibit
Number(1)

Description

3.1 — Amended and Restated Articles of Incorporation of Prosperity (incorporated herein by reference to

Exhibit 3.1 to the Company’s Registration Statement on Form S-1 (Registration No. 333-63267))

3.2 — Articles of Amendment to Amended and Restated Articles of Incorporation of the Company
(incorporated herein by reference to Exhibit 3.2 to the Company’s Quarterly Report on Form 10-Q
for the quarter ended March 31, 2006)

3.3 — Amended and Restated Bylaws of Prosperity (incorporated herein by reference to Exhibit 3.1 to the

Company’s Current Report on Form 8-K filed April 20, 2006)

4.1 — Form of certificate representing shares of Prosperity common stock (incorporated herein by
reference to Exhibit 4 to the Company’s Registration Statement on Form S-1 (Registration No. 333-
63267))

4.2 — Indenture dated as of July 31, 2001 by and between Prosperity Bancshares, Inc., as Issuer, and State
Street Bank and Trust Company of Connecticut, National Association, with respect to the Floating
Rate Junior Subordinated Deferrable Interest Debentures of Prosperity Bancshares,
Inc.
(incorporated herein by reference to Exhibit 4.1 to the Company’s Quarterly Report on Form 10-Q
for the quarter ended September 30, 2001)

4.3 — Amended and Restated Declaration of Trust of Prosperity Statutory Trust II dated as of July 31,
2001 (incorporated herein by reference to Exhibit 4.2 to the Company’s Quarterly Report on Form
10-Q for the quarter ended September 30, 2001)

60

Exhibit
Number(1)

Description

4.4 — Guarantee Agreement dated as of July 31, 2001 by and between Prosperity Bancshares, Inc. and
State Street Bank and Trust Company of Connecticut, National Association (incorporated herein by
reference to Exhibit 4.3 to the Company’s Quarterly Report on Form 10-Q for the quarter ended
September 30, 2001)

10.1† — Prosperity Bancshares, Inc. 1995 Stock Option Plan (incorporated herein by reference to Exhibit
10.1 to the Company’s Registration Statement on Form S-1 (Registration No. 333-63267))

10.2† — Prosperity Bancshares, Inc. 1998 Stock Incentive Plan (incorporated herein by reference to Exhibit
10.2 to the Company’s Registration Statement on Form S-1 (Registration No. 333-63267))

10.3† — Prosperity Bancshares, Inc. 2004 Stock Incentive Plan (incorporated herein by reference to Exhibit

10.3 to the Company’s Registration Statement on Form S-4 (Registration No. 333-121767))

10.4† — Amended and Restated Employment Agreement by and between Prosperity Bank and David Zalman
(incorporated herein by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K
filed January 24, 2005)

10.5† — Amended and Restated Employment Agreement by and between Prosperity Bank and
H. E. Timanus, Jr. (incorporated herein by reference to Exhibit 10.2 to the Company’s Current
Report on Form 8-K filed January 24, 2005)

10.6† — Employment Agreement, dated as of August 10, 2006, by and among Prosperity Bancshares, Inc.,
Prosperity Bank and James D. Rollins III (incorporated herein by reference to Exhibit 10.1 to the
Company’s Current Report on Form 8-K filed on August 15, 2006)

10.7† — Employment Agreement, dated as of August 10, 2006, by and among Prosperity Bancshares, Inc.,
Prosperity Bank and David Hollaway (incorporated herein by reference to Exhibit 10.2 to the
Company’s Current Report on Form 8-K filed on August 15, 2006)

10.8† — Non-Competition, Non-Solicitation and Confidentiality Agreement, dated as of January 31, 2007, by
and between L. Don Stricklin, Texas United and Prosperity (incorporated herein by reference to
Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on February 2, 2007)

10.9† — First Amendment to Employment and Non-Competition Agreement, dated as of September 19,
2006, by and between Prosperity Bank and Peter E. Fisher (incorporated herein by reference to
Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on September 21, 2006)

10.10† — Employment and Non-Competition Agreement, dated as of September 1, 2002, by and between
Prosperity Bank and Peter E. Fisher (incorporated herein by reference to Exhibit 10.2 to the
Company’s Current Report on Form 8-K filed on September 21, 2006)

10.11† — Termination Agreement dated as of December 8, 2005 by and among Prosperity Bancshares, Inc.,
Prosperity Bank and D. Michael Hunter (incorporated herein by reference to Exhibit 10.1 to the
Company’s Current Report on Form 8-K filed December 9, 2005)

10.12† — Non-Competition Agreement dated as of December 8, 2005 by and among Prosperity Bancshares,
Inc., Prosperity Bank and D. Michael Hunter (incorporated herein by reference to Exhibit 10.2 to the
Company’s Current Report on Form 8-K filed December 9, 2005)

10.13† — Paradigm Bancorporation, Inc. 1999 Stock Incentive Plan (incorporated herein by reference to

Exhibit 4.2 to the Company’s Registration Statement on Form S-8 (Registration No. 333-100815))

10.14† — MainBancorp, Inc. 1996 Employee Stock Option Plan (incorporated herein by reference to Exhibit
4.2 to the Company’s Registration Statement on Form S-8 (Registration No. 333-110755))

10.15† — Form of MainBancorp, Inc. Non-Qualified Stock Option Agreement (incorporated herein by
reference to Exhibit 4.3 to the Company’s Registration Statement on Form S-8 (Registration No.
333-110755))

61

Exhibit
Number(1)

Description

10.16† — First Capital Bankers, Inc. 1996 Executive Stock Option Plan (incorporated herein by reference to
Exhibit 10.11 to the Company’s Annual Report on Form 10-K for the year ended December 31,
2004)

10.17† — First Capital Bankers, Inc. Amended and Restated 1998 Stock Option Plan (incorporated herein by
reference to Exhibit 10.12 to the Company’s Annual Report on Form 10-K for the year ended
December 31, 2004)

10.18† — SNB Bancshares, Inc. 2002 Stock Option Plan, as amended and restated (incorporated herein by
reference to Exhibit 4.2 to the Company’s Registration Statement on Form S-8 (Registration No.
333-133214))

10.19† — Texas United Bancshares, Inc. 1998 Incentive Stock Option Plan (incorporated herein by reference
to Exhibit 4.2 to the Company’s Registration Statement on Form S-8 (Registration No. 333-
140425))

10.20† — Texas United Bancshares, Inc. 2004 Stock Incentive Plan (incorporated herein by reference to

Exhibit 4.3 to the Company’s Registration Statement on Form S-8 (Registration No. 333-140425))

10.21† — 1998 Incentive Stock Option Plan for Gateway Holding Company, Inc. (incorporated herein by
reference to Exhibit 4.4 to the Company’s Registration Statement on Form S-8 (Registration No.
333-140425))

10.22† — Stock Option Agreement dated July 1, 1998 by and between Texas United Bancshares, Inc. and
L. Steve Stapp (incorporated herein by reference to Exhibit 4.5 to the Company’s Registration
Statement on Form S-8 (Registration No. 333-140425))

21.1

*— Subsidiaries of Prosperity Bancshares, Inc.

23.1

*— Consent of Deloitte & Touche LLP

31.1

*— Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange

Act of 1934, as amended.

31.2

*— Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange

Act of 1934, as amended.

32.1

**— Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002.

32.2

**— Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002.

† Management contract or compensatory plan or arrangement.
*
Filed with this Annual Report on Form 10-K.
** Furnished with this Annual Report on Form 10-K.
(1) The Company has other

long-term debt

forth in
Section 601(b)(4)(iii)(A) of Regulation S-K. The Company hereby agrees to furnish a copy of such
agreements to the Commission upon request.

exclusion set

agreements

that meet

the

62

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Prosperity
Bancshares, Inc., has duly caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

Date: March 1, 2007

PROSPERITY BANCSHARES, INC.®

By:

/s/ DAVID ZALMAN

David Zalman
Chairman of the Board and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has
been signed by the following persons on behalf of the registrant in the capacities and on the date indicated.

Signature

Positions

Date

/s/ DAVID ZALMAN

David Zalman

/s/ DAVID HOLLAWAY

David Hollaway

/s/

JAMES A. BOULIGNY
James A. Bouligny

Chairman of the Board and Chief

March 1, 2007

Executive Officer
(principal executive officer); Director

Chief Financial Officer (principal
financial officer and principal
accounting officer)

March 1, 2007

Director

March 1, 2007

/s/ CHARLES A. DAVIS, JR.

Director

March 1, 2007

Charles A. Davis, Jr.

/s/ WILLIAM H. FAGAN, M.D.

Director

March 1, 2007

William Fagan, M.D.

/s/ NED S. HOLMES

Ned S. Holmes

Director

March 1, 2007

/s/ D. MICHAEL HUNTER

Director

March 1, 2007

D. Michael Hunter

/s/ S. REED MORIAN

S. Reed Morian

Director

March 1, 2007

/s/ PERRY MUELLER, JR., D.D.S.

Director

March 1, 2007

Perry Mueller, Jr., D.D.S.

/s/

JAMES D. ROLLINS, III
James D. Rollins, III

Director

63

March 1, 2007

Signature

Positions

Date

/s/ TRACY T. RUDOLPH

Director

March 1, 2007

Tracy T. Rudolph

/s/ HARRISON STAFFORD II

Director

March 1, 2007

Harrison Stafford II

/s/ ROBERT STEELHAMMER

Director

March 1, 2007

Robert Steelhammer

/s/ L. DON STRICKLIN

Director

March 1, 2007

L. Don Stricklin

/s/ H.E. TIMANUS, JR.

Director

March 1, 2007

H.E. Timanus, Jr.

64

TABLE OF CONTENTS TO CONSOLIDATED FINANCIAL STATEMENTS

Prosperity Bancshares, Inc.®

Report of Independent Registered Public Accounting Firm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Consolidated Balance Sheets as of December 31, 2006 and 2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Consolidated Statements of Income for the Years Ended December 31, 2006, 2005 and 2004 . . . . . . .

Consolidated Statements of Changes in Shareholders’ Equity for the Years Ended December 31,

2006, 2005 and 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Consolidated Statements of Cash Flows for the Years Ended December 31, 2006, 2005 and 2004 . . . .

Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page

66

67

68

69

70

71

65

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of
Prosperity Bancshares, Inc.
Houston, Texas

We have audited the accompanying consolidated balance sheets of Prosperity Bancshares Inc. and
subsidiaries (the “Company”) as of December 31, 2006 and 2005, and the related consolidated statements of
income, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 2006.
These financial statements are the responsibility of the Company’s management. Our responsibility is to express
an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight
Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance
about whether the financial statements are free of material misstatement. An audit includes examining, on a test
basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by management, as well as evaluating
the overall financial statement presentation. We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial
position of Prosperity Bancshares, Inc. and subsidiaries as of December 31, 2006 and 2005, and the results of
their operations and their cash flows for each of the three years in the period ended December 31, 2006, in
conformity with accounting principles generally accepted in the United State of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board
(United States), the effectiveness of the Company’s internal control over financial reporting as of December 31,
2006, based on the criteria established in Internal Control—Integrated Framework issued by the Committee of
Sponsoring Organizations of the Treadway Commission and our report dated February 27, 2007, expressed an
unqualified opinion on management’s assessment of the effectiveness of the Company’s internal control over
financial reporting and an unqualified opinion on the effectiveness of the Company’s internal control over
financial reporting.

Houston, Texas
February 27, 2007

66

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

ASSETS
Cash and due from banks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Federal funds sold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total cash and cash equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest bearing deposits in financial institutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Available for sale securities, at fair value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Held to maturity securities, at cost
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loans held for investment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less allowance for credit losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued interest receivable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Core deposit intangibles, net of accumulated amortization of $11.6 million and

Loans, net

$6.7 million, respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bank premises and equipment, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other real estate owned . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bank Owned Life Insurance (BOLI), net
Leased assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TOTAL ASSETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LIABILITIES AND SHAREHOLDERS’ EQUITY

LIABILITIES:
Deposits:

December 31,

2006

2005

(Dollars in thousands)

$ 116,078
153,643
269,721
397
434,331
1,155,972
2,176,507
(23,990)
2,152,517
20,364
424,339

$

91,518
5,846
97,364
297
410,361
1,162,241
1,542,125
(17,203)
1,524,922
16,105
261,964

23,032
63,057
140
14,176
3,709
25,014
$4,586,769

22,461
49,244
239
13,676
4,464
22,644
$3,585,982

Noninterest-bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interest-bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities sold under repurchase agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued interest payable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 835,876
2,889,802
3,725,678
26,408
47,225
8,451
14,077
100,519
3,922,358

$ 674,407
2,245,911
2,920,318
55,404
46,985
6,546
16,237
75,775
3,121,265

SHAREHOLDERS EQUITY:

Preferred stock, $1 par value; 20,000,000 shares authorized; none issued or

outstanding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—

—

Common stock, $1 par value; 200,000,000 shares authorized; 32,829,873 and
27,857,887 shares issued at December 31, 2006 and 2005, respectively;
32,792,785 and 27,820,799 shares outstanding at December 31, 2006 and
2005, respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capital surplus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accumulated other comprehensive loss—net unrealized loss on available for sale
securities, net of tax benefit of $1,588 and $2,122, respectively . . . . . . . . . . . .
Less treasury stock, at cost, 37,088 shares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY . . . . . . . . . . . . . . . . . . . . .

32,830
425,557
209,581

27,858
280,525
160,883

(2,950)
(607)
664,411
$4,586,769

(3,942)
(607)
464,717
$3,585,982

See notes to consolidated financial statements.

67

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

For the Years Ended
December 31,
2005

2006

2004

(Dollars in thousands, except
per share data)

INTEREST INCOME:

Loans, including fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities:

Taxable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nontaxable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
70% nontaxable preferred dividends . . . . . . . . . . . . . . . . . . . .
Federal funds sold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deposits in financial institutions . . . . . . . . . . . . . . . . . . . . . . . . . . .

$157,426

$ 99,958

$ 55,779

69,896
1,821
915
1,667
14

59,066
1,286
514
1,292
7

52,771
1,461
1,009
556
180

Total interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . .

231,739

162,123

111,756

INTEREST EXPENSE:

Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities sold under repurchase agreements . . . . . . . . . . . . . . . . . .
Other borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total interest expense . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NET INTEREST INCOME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PROVISION FOR CREDIT LOSSES . . . . . . . . . . . . . . . . . . . . . . . . . . .

NET INTEREST INCOME AFTER PROVISION FOR CREDIT

80,942
7,592
1,820
3,240

93,594

138,145
504

43,643
4,895
768
1,920

51,226

110,897
480

24,586
4,046
232
925

29,789

81,967
880

LOSSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

137,641

110,417

81,087

NONINTEREST INCOME:

Service charges on deposit accounts . . . . . . . . . . . . . . . . . . . . . . . .
(Loss) gain on sale of securities, net . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total noninterest income . . . . . . . . . . . . . . . . . . . . . . . . .

NONINTEREST EXPENSE:

Salaries and employee benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net occupancy expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Core deposit intangibles amortization . . . . . . . . . . . . . . . . . . . . . . .
Depreciation expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total noninterest expense . . . . . . . . . . . . . . . . . . . . . . . . .

INCOME BEFORE INCOME TAXES . . . . . . . . . . . . . . . . . . . . . . . . . .
PROVISION FOR INCOME TAXES . . . . . . . . . . . . . . . . . . . . . . . . . . .

27,379
0
6,603

33,982

41,298
7,884
3,612
4,869
5,048
14,958

77,669

93,954
32,229

24,985
(79)
5,115

30,021

36,672
6,663
2,837
3,912
4,462
14,411

68,957

71,481
23,621

20,215
78
2,778

23,071

27,861
4,814
2,036
1,781
2,843
12,372

51,707

52,451
17,744

NET INCOME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 61,725

$ 47,860

$ 34,707

EARNINGS PER SHARE:

Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

1.96

1.94

$

$

1.79

1.77

$

$

1.61

1.59

See notes to consolidated financial statements.

68

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S

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

CASH FLOWS FROM OPERATING ACTIVITIES:

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments to reconcile net income to net cash provided by operating activities: . . . . . . . .
Depreciation and amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Provision for credit losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net amortization of premium on investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on sale of premises, equipment and other real estate . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gain on held for sale loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss on sale of securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Funding of held for sale loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from sale of held for sale loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stock based compensation expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Increase) decrease in accrued interest receivable and other assets . . . . . . . . . . . . . . . . . . . .
Increase (decrease) in accrued interest payable and other liabilities . . . . . . . . . . . . . . . . . . . .

For the Years Ended
December 31,

2006

2005

2004

(Dollars in thousands)

$

61,725

$ 47,860

$ 34,707

9,917
504
(736)
(622)
—
—
—
—
850
(3,041)
6,637

8,374
480
2,781
(72)
(173)
79
(14,540)
14,717
751
5,891
(446)

5,122
880
4,869
(389)
—
—
—
—
141
(4,056)
7,649

Net cash provided by operating activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

75,234

65,702

48,923

CASH FLOWS FROM INVESTING ACTIVITIES:

Proceeds from maturities and principal paydowns of held to maturity securities . . . . . . . . . . . . . .
Purchase of held to maturity securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from maturities and principal paydowns of available for sale securities . . . . . . . . . . . . .
Proceeds from the sales of available for sale securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purchase of available for sale securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net (increase) decrease in loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Purchase of bank premises and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from sale of bank premises, equipment and other real estate . . . . . . . . . . . . . . . . . . . . . .
Purchase of SNB Bancshares, Inc.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents acquired in the purchase of SNB Bancshares, Inc. . . . . . . . . . . . . . . . .
Purchase of First Capital Bankers, Inc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents acquired in the purchase of First Capital Bankers, Inc.
. . . . . . . . . . . .
Purchase of Grapeland Bancshares, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents acquired in the purchase of Grapeland Bancshares, Inc.
. . . . . . . . . . .
Purchase of Liberty Bancshares, Inc. and Village Bank & Trust, ssb . . . . . . . . . . . . . . . . . . . . . . .
Cash and cash equivalents acquired in the purchase of Liberty Bancshares, Inc. and Village

Bank & Trust, ssb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net (increase) decrease in interest-bearing deposits in financial institutions . . . . . . . . . . . . . . . . .

297,721
(79,638)
1,724,786
7,193
(1,739,992)
(36,946)
(4,430)
3,499
(93,861)
18,020
—
—
(77)
—
—

263,966
(254,476)
81,916
—

(224,203)
2,279
(1,745)
2,428
—
—
(2,182)
58,972
(163)
4,525
—

—
(100)

—

(1)

Net cash provided by (used in) investing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

96,175

(68,684)

257,501
(270,855)
67,201
20,000
(299)
(68,254)
(895)
3,297
—
—
—
—
—
—
(28,282)

62,719
762

42,895

CASH FLOWS FROM FINANCING ACTIVITIES:

Net increase (decrease) in noninterest-bearing deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net increase (decrease) in interest-bearing deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Repayments) proceeds of other borrowings and securities sold under repurchase agreements

$

31,652
29,787

$ 60,252
(122,734)

$

(9,892)
(14,727)

(net) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(49,256)

33,457

4,622

Redemption of junior subordinated debentures issued to Paradigm Capital Trust II and

Prosperity Capital Trust I, respectively . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proceeds from stock option exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Payments of cash dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(6,000)
7,792
(13,027)

—
1,085
(9,624)

(12,000)
1,046
(6,670)

Net cash provided by (used in) financing activities . . . . . . . . . . . . . . . . . . . . . . . . . . . .

948

(37,564)

(37,621)

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS . . . . . . . . . . . . . . . . . . . . .
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD . . . . . . . . . . . . . . . . . . . . . . . . . . .

CASH AND CASH EQUIVALENTS, END OF PERIOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NONCASH ACTIVITIES:
Stock issued in connection with the SNB Bancshares, Inc. acquisition . . . . . . . . . . . . . . . . . . . . . . . . .
Stock issued in connection with the First Capital Bankers, Inc. acquisition . . . . . . . . . . . . . . . . . . . . . .
Stock issued in connection with the Grapeland Bancshares, Inc. acquisition . . . . . . . . . . . . . . . . . . . . .
Stock issued in connection with the Liberty Bancshares, Inc. acquisition . . . . . . . . . . . . . . . . . . . . . . .

SUPPLEMENTAL INFORMATION:
Income taxes paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Interest paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

$

$

$

172,357
97,364

$ (40,546) $ 54,197
83,713

137,910

269,721

$ 97,364

$ 137,910

141,362
—
—
—

—

142,518
7,127
—

—
—
—
31,958

20,650

$ 21,350

$ 19,464

91,689

$ 47,782

$ 29,368

See notes to consolidated financial statements.

70

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING AND

REPORTING POLICIES

Nature of Operations—Prosperity Bancshares, Inc.® (“Bancshares”) and its subsidiaries, Prosperity
Holdings of Delaware, LLC (“Holdings”) and Prosperity Bank® (the “Bank”, and together with Bancshares and
Holdings, collectively referred to as the “Company”) provide retail and commercial banking services.

The Bank operates eighty-eight (88) full-service banking locations in the state of Texas; with thirty-eight
(38) in the Greater Houston Consolidated Metropolitan Statistical Area (“CMSA”), seventeen (17) in fifteen
contiguous counties situated south and southwest of Houston and extending into South Texas, eleven (11) in the
Dallas/Fort Worth area, five (5) in the Austin area, fifteen (15) in the Corpus Christi area and two (2) in the East
Texas area with locations in:

Principles of Consolidation—The consolidated financial statements include the accounts of Bancshares
intercompany transactions have been eliminated in
and its wholly owned subsidiaries. All significant
consolidation. The accounting and reporting policies of the Company conform to accounting principles generally
accepted in the United States of America (“GAAP”) and the prevailing practices within the banking industry. A
summary of significant accounting and reporting policies is as follows:

Use of Estimates—The preparation of financial statements in conformity with GAAP requires management
to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of
contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and
expenses during the reporting period. Actual results could differ from these estimates.

Securities—Securities held to maturity are carried at cost, adjusted for the amortization of premiums and
the accretion of discounts. Management has the positive intent and the Company has the ability to hold these
assets as long-term securities until their estimated maturities.

Securities available for sale are carried at fair value. Unrealized gains and losses are excluded from earnings
and reported, net of tax, as a separate component of shareholders’ equity until realized. Securities within the
available for sale portfolio may be used as part of the Company’s asset/liability strategy and may be sold in
response to changes in interest risk, prepayment risk or other similar economic factors.

Declines in the fair value of individual held to maturity and available for sale securities below their cost that
are other than temporary would result in write-downs of the individual securities to their fair value. The related
write-downs would be included in earnings as realized losses.

Premiums and discounts are amortized and accreted to operations using the level-yield method of
accounting, adjusted for prepayments as applicable. The specific identification method of accounting is used to
compute gains or losses on the sales of these assets. Interest earned on these assets is included in interest income.

Loans Held for Investment—Loans are stated at the principal amount outstanding, net of unearned
discount and fees. Unearned discount relates principally to consumer installment loans. The related interest
income for multipayment loans is recognized principally by the “sum of the digits” method which records
interest in proportion to the declining outstanding balances of the loans; for single payment loans, such income is
recognized using the straight-line method.

Nonrefundable Fees and Costs Associated with Lending Activities—Loan origination fees in excess of
the associated costs are recognized over the life of the related loan as an adjustment to yield using the interest
method.

71

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Generally, loan commitment fees are deferred, except for certain retrospectively determined fees, and
recognized as an adjustment of yield by the interest method over the related loan life or, if the commitment
expires unexercised, recognized in income upon expiration of the commitment.

Nonperforming and Past Due Loans—Included in the nonperforming loan category are loans which have
been categorized by management as nonaccrual because collection of interest is doubtful and loans which have
been restructured to provide a reduction in the interest rate or a deferral of interest or principal payments. When
the payment of principal or interest on a loan is delinquent for 90 days, or earlier in some cases, the loan is placed
on nonaccrual status unless the loan is in the process of collection and the underlying collateral fully supports the
carrying value of the loan. If the decision is made to continue accruing interest on the loan, periodic reviews are
made to confirm the accruing status of the loan. When a loan is placed on nonaccrual status, interest accrued
during the current year prior to the judgment of uncollectibility is charged to operations. Interest accrued during
prior periods is charged to allowance for credit losses. Generally, any payments received on nonaccrual loans are
applied first to outstanding loan amounts and next to the recovery of charged-off loan amounts. Any excess is
treated as recovery of lost interest.

Restructured loans are those loans on which concessions in terms have been granted because of a borrower’s

financial difficulty. Interest is generally accrued on such loans in accordance with the new terms.

Allowance for Credit Losses—The allowance for credit losses is a valuation allowance available for losses
incurred on loans. All losses are charged to the allowance when the loss actually occurs or when a determination
is made that such a loss is probable. Recoveries are credited to the allowance at the time of recovery.

Throughout the year, management estimates the probable level of losses to determine whether the allowance
for credit losses is adequate to absorb losses inherent in the loan portfolio. Based on these estimates, an amount is
charged to the provision for credit losses and credited to the allowance for credit losses in order to adjust the
allowance to a level determined to be adequate to absorb losses.

In making its evaluation of the adequacy of the allowance for credit losses, management considers factors
such as historical loan loss experience, industry diversification of the Company’s commercial loan portfolio, the
amount of nonperforming assets and related collateral, the volume, growth and composition of the Company’s
loan portfolio, current economic changes that may affect the borrower’s ability to pay and the value of collateral,
the evaluation of the Company’s loan portfolio through its internal loan review process and other relevant
factors.

Estimates of credit losses involve an exercise of judgment. While it is possible that in the short term the
Company may sustain losses which are substantial in relation to the allowance for credit losses, it is the judgment
of management that the allowance for credit losses reflected in the consolidated balance sheets is adequate to
absorb probable losses that exist in the current loan portfolio.

Statement of Financial Accounting Standards (“SFAS”) No. 114, Accounting by Creditors for Impairment of
a Loan, as amended by SFAS No. 118, Accounting by Creditors for Impairment of a Loan—Income Recognition
and Disclosure applies to all impaired loans, with the exception of groups of smaller-balance homogeneous loans
that are collectively evaluated for impairment. A loan is defined as impaired by SFAS No. 114 if, based on
current information and events, it is probable that a creditor will be unable to collect all amounts due, both
interest and principal, according to the contractual terms of the loan agreement. Specifically, SFAS No. 114
requires that the allowance for credit losses related to impaired loans be determined based on the difference of
carrying value of loans and the present value of expected cash flows discounted at the loan’s effective interest

72

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

rate or, as a practical expedient, the loan’s observable market price or the fair value of the collateral if the loan is
collateral dependent. At December 31, 2006, the Company had $181,000 in nonaccrual loans, $767,000 in 90
days or more past due loans and no restructured loans. At December 31, 2005, the Company had $355,000 in
nonaccrual loans, $788,000 in 90 days or more past due loans and no restructured loans.

Interest revenue received on impaired loans is either applied against principal or realized as interest revenue,

according to management’s judgment as to the collectibility of principal.

Premises and Equipment—Premises and equipment are carried at cost less accumulated depreciation.
Depreciation expense is computed principally using the straight-line method over the estimated useful lives of
the assets which range from three to 30 years. Leasehold improvements are amortized using the straight-line
method over the periods of the leases or the estimated useful lives, whichever is shorter.

Goodwill—Goodwill is annually assessed for impairment or when events or changes in circumstances
indicate that the carrying amount of the asset may not be recoverable. The Company bases its evaluation on such
impairment factors as the nature of the assets, the future economic benefit of the assets, any historical or future
profitability measurements, as well as other external market conditions or factors that may be present.

Amortization of Core Deposit Intangibles—Core deposit intangibles are amortized using an accelerated

amortization method over an 8 year period.

Income Taxes—Bancshares files a consolidated federal income tax return. The Bank computes federal
income taxes as if it filed a separate return and remits to, or is reimbursed by, Bancshares based on the portion of
taxes currently due or refundable.

Deferred tax assets and liabilities are recognized for the estimated tax consequences attributable to
differences between the financial statement carrying amounts of existing assets and liabilities and their respective
tax basis.

Stock-Based Compensation—As of December 31, 2006, the Company had three stock-based employee
compensation plans. Prior to 2003, the Company accounted for awards granted under stock-based compensation
plans under the recognition and measurement provisions of APB Opinion No. 25, Accounting for Stock Issued to
Employees, and related Interpretations. No stock-based employee compensation cost was reflected in previously
reported results, as all options granted under those plans had an exercise price equal to the market value of the
underlying common stock on the date of grant. Effective January 1, 2003, the Company adopted the fair value
recognition provisions of FASB Statement No. 123, Accounting for Stock-Based Compensation, as provided by
SFAS No. 148 for stock-based employee compensation. On January 1, 2006, the Company adopted FASB
Statement No. 123(R) (see Note 14).

Cash and Cash Equivalents—For purposes of reporting cash flows, cash and cash equivalents include cash

and due from banks as well as federal funds sold that mature in three days or less.

Reclassifications—Certain reclassifications have been made to prior year amounts to conform to current
year presentation. All reclassifications have been applied consistently for the periods presented. During 2005, the
Company elected to reclassify brokered mortgage income from other noninterest income to a separate category
and reclassify net gains on held for sale loans from net gains on sales of assets to a separate category. These
reclassifications had no impact on financial condition, net income or equity in any of the reported periods.

73

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Earnings Per Share—SFAS No. 128, Earnings Per Share, requires presentation of basic and diluted
earnings per share. Basic earnings per share has been computed by dividing net income available to common
shareholders by the weighted average number of common shares outstanding for the reporting period. Diluted
earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common
stock were exercised or converted into common stock. Net income per common share for all periods presented
has been calculated in accordance with SFAS 128. Outstanding stock options issued by the Company represent
the only dilutive effect reflected in diluted weighted average shares.

The following table illustrates the computation of basic and diluted earnings per share:

2006

December 31,

2005

2004

Per
Share
Amount

Per
Share
Amount

Amount

Per
Share
Amount

Amount

(In thousands, except per share data)

$47,860

$34,707

Amount

$61,725

Net income . . . . . . . . . . . . . . . . . . .
Basic:

Weighted average shares

outstanding . . . . . . . . . . . . .

31,491

$1.96

26,706

$1.79

21,534

$1.61

Diluted:

Weighted average shares

outstanding . . . . . . . . . . . . .

31,491

Effect of dilutive securities—

options . . . . . . . . . . . . . . . . .

402

26,706

318

21,534

270

Total

. . . . . . . . . . . . . . . . . . . .

31,893

$1.94

27,024

$1.77

21,804

$1.59

The incremental shares for the assumed exercise of the outstanding options were determined by application
of the treasury stock method. There were no stock options exercisable at December 31, 2006, 2005 and 2004 that
would have had an anti-dilutive effect on the above computation.

New Accounting Standards—

Statements of Financial Accounting Standards

SFAS No. 123(R), “Share-Based Payment (Revised 2004).” SFAS 123(R) establishes standards for the
accounting for transactions in which an entity (i) exchanges its equity instruments for goods or services, or
(ii) incurs liabilities in exchange for goods or services that are based on the fair value of the entity’s equity
instruments or that may be settled by the issuance of the equity instruments. SFAS 123(R) eliminates the ability
to account for stock-based compensation using Accounting Pronouncements Board (“APB”) 25 and requires that
such transactions be recognized as compensation cost in the income statement based on their fair values on the
date of the grant. SFAS 123(R) applies to new awards, modified awards and to awards cancelled after January 1,
2006. SFAS 123(R) was effective on January 1, 2006 and its adoption did not have a material impact on the
Company’s financial statements. The Company had previously adopted SFAS No. 123 on January 1, 2003. The
Company recorded $850,000, $751,000 and $141,000 in stock-based compensation expense for the years ended
December 31, 2006, 2005 and 2004, respectively.

74

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

SFAS No. 154, “Accounting Changes and Error Corrections, a Replacement of APB Opinion No. 20 and
FASB Statement No. 3.” SFAS 154 establishes, unless impracticable, retrospective application as the required
method for reporting a change in accounting principle in the absence of explicit transition requirements specific
to a newly adopted accounting principle. Previously, most changes in accounting principle were recognized by
including the cumulative effect of changing to the new accounting principle in net income of the period of the
change. SFAS 154 also carries forward without change the guidance contained in APB Opinion 20, for reporting
the correction of an error in previously issued financial statements and for a change in an accounting estimate.
SFAS 154 is effective for accounting changes and corrections of errors made in fiscal years beginning after
December 15, 2005. The Company’s adoption of SFAS 154 did not significantly impact its financial statements
upon its adoption on January 1, 2006.

SFAS No. 157, “Fair Value Measurement”. In 2006, the Financial Accounting Standards Board (“FASB”)
issued FASB Statement No. 157 (SFAS 157). SFAS 157 provides a single definition of fair value, together with a
framework for measuring it, and requires additional disclosure about the use of fair value to measure assets and
liabilities. SFAS 157 also emphasizes that fair value is a market-based measurement, not an entity-specific
measurement, and sets out a fair value hierarchy with the highest priority being quoted prices in active markets.
SFAS 157 is effective for financial statements issued for fiscal years beginning after November 15, 2007 and is
not expected to have a significant impact on the Company’s financial statements.

SFAS No. 159, “The Fair Value Option for Financial Assets and Financial Liabilities—Including an
amendment of FASB Statement No. 115”. In 2007, the Financial Accounting Standards Board (“FASB”) issued
FASB Statement No. 159 (SFAS 159). The fair value option established by this Statement permits all entities to
choose to measure eligible items at fair value at specified election dates. A business entity shall report unrealized
gains and losses on items for which the fair value option has been elected in earnings (or another performance
indicator if the business entity does not report earnings) at each subsequent reporting date. A not-for-profit
organization shall report unrealized gains and losses in its statement of activities or similar statement. The fair
value option: (i) may be applied instrument by instrument, with a few exceptions, such as investments otherwise
accounted for by the equity method (ii) is irrevocable (unless a new election date occurs) (iii) is applied only to
entire instruments and not to portions of instruments. SFAS 159 is effective for financial statements issued for
fiscal years beginning after November 15, 2007 and is not expected to have a significant impact on the
Company’s financial statements.

Financial Accounting Standards Board Staff Positions and Interpretations

FASB Staff Position (FSP) No. 115-1, “The Meaning of Other-Than-Temporary Impairment and Its
Application to Certain Investments.” FSP 115-1 provides guidance for determining when an investment is
considered impaired, whether impairment is other-than-temporary, and measurement of an impairment loss. An
investment is considered impaired if the fair value of the investment is less than its cost. If, after consideration of
all available evidence to evaluate the realizable value of its investment, impairment is determined to be other-
than-temporary, then an impairment loss should be recognized equal to the difference between the investment’s
cost and its fair value. FSP 115-1 nullifies certain provisions of Emerging Issues Task Force (EITF) Issue
No. 03-1, “The Meaning of Other-Than-Temporary Impairment and Its Application to Certain Investments,”
while retaining the disclosure requirements of EITF 03-1 which were adopted in 2003. FSP 115-1 was effective
for reporting periods beginning after December 15, 2005. The Company’s adoption of FSP 115-1 on January 1,
2006 did not significantly impact its financial statements.

In June 2006, the FASB issued FASB Interpretation No. 48 (FIN 48) Accounting for Uncertainty in Income
Taxes, an interpretation of FASB Statement No. 109. FIN 48 clarifies the accounting for uncertainty in income
taxes recognized in an enterprise’s financial statements in accordance with FASB Statement No. 109 (FAS 109),

75

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Accounting for Income Taxes. FIN 48 clarifies the application of FAS 109 by defining a criterion that an
individual tax position must meet for any part of the benefit of that position to be recognized in an enterprise’s
financial statements. Additionally, FIN 48 provides guidance on measurement, derecognition, classification,
interest and penalties, accounting in interim periods, disclosure, and transition. FIN 48 is effective for fiscal years
beginning after December 15, 2006. The Company’s adoption of FIN 48 is not expected to have a material
impact on its financial statements.

2. ACQUISITIONS

Acquisitions are an integral part of the Company’s growth strategy. All acquisitions were accounted for
using the purchase method of accounting. Accordingly, the assets and liabilities of the acquired entities were
recorded at their fair values at the acquisition date. The excess of the purchase price over the estimated fair value
of the net assets for each acquisition was recorded as goodwill, none of which was deductible for tax purposes.
The identified core deposit intangibles for each acquisition are being amortized using an accelerated amortization
method over an 8 year life. The results of operations for each acquisition have been included in the Company’s
consolidated financial results beginning on the respective acquisition date. The following acquisitions were
completed on the dates indicated:

On April 1, 2006, the Company completed its acquisition of SNB Bancshares, Inc., Sugar Land, Texas
(“SNB”). Under the terms of the agreement, SNB merged into the Company and subsequently, SNB’s wholly
owned subsidiary, Southern National Bank of Texas, merged into the Bank. The Company issued approximately
4.448 million shares of its common stock and paid $93.3 million in cash for all of the issued and outstanding capital
stock of SNB. In addition, options to acquire 761,950 shares of SNB common stock were converted into options to
acquire 467,578 shares of Company common stock. All remaining options to acquire SNB common stock were
cancelled and redeemed for cash prior to the merger. In connection with the merger, the Company assumed
$30.9 million in junior subordinated debentures issued to three subsidiary trusts. SNB was publicly traded and
operated five (5) banking offices in Fort Bend County, Houston and Katy, Texas and two (2) stand alone motor
banks in Houston, Texas. At the time of acquisition, SNB had an additional banking office under construction in
Katy, Texas, which became a full-service banking center of the Company upon completion in July 2006. As of
December 31, 2005, SNB had, on a consolidated basis, total assets of $1.025 billion, loans (including loans held for
sale) of $652.8 million, deposits of $892.0 million and shareholders’ equity of $82.5 million.

The table below summarizes select pro forma data for the combined company for the periods indicated
assuming the SNB merger was effective on January 1 of the indicated periods. The information in the table below
also gives effect to the Company’s acquisition of First Capital on March 1, 2005 and Grapeland on December 1,
2005.

For the twelve months ended
December 31,

2006

2005

(In thousands)
(unaudited)

Net interest income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Earnings per share (diluted)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weighted average diluted shares . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$146,224
$ 63,870
1.94
$
33,002

$127,420
$ 59,175
1.82
$
32,521

The pro forma results are not necessarily indicative of what actually would have occurred if the SNB merger

had occurred on January 1 of each indicated period, or of any future consolidated results.

76

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

In connection with the purchase, the Company recorded a premium of $166.7 million, of which $5.7 million
was identified as core deposit intangibles. The remaining $161.0 million of the premium was recorded as
goodwill.

On December 1, 2005, the Company completed its acquisition of Grapeland Bancshares, Inc. (“Grapeland”),
Grapeland, Texas. Under the terms of the agreement, Grapeland merged into the Company and subsequently,
Grapeland’s wholly owned subsidiary, First State Bank of Grapeland, merged into the Bank. The Company
issued 232,888 shares of its Common Stock for all of the issued and outstanding capital stock of Grapeland.
Grapeland was privately held and operated two (2) banking offices in Grapeland and Crockett, Texas, both of
which became full service banking centers of the Company. As of September 30, 2005, Grapeland had, on a
loans of $43.7 million, deposits of $46.6 million and
consolidated basis,
shareholders’ equity of $3.8 million.

total assets of $72.2 million,

In connection with the purchase, the Company recorded a premium of $5.4 million, of which $1.5 million
was identified as core deposit intangibles. The remaining $3.9 million of the premium was recorded as goodwill.

On March 1, 2005, the Company completed its acquisition of First Capital Bankers, Inc. (“First Capital”),
Corpus Christi, Texas. Under the terms of the agreement, First Capital was merged into the Company and
subsequently, First Capital’s wholly owned subsidiary, FirstCapital Bank, s.s.b., was merged into the Bank. The
Company issued approximately 5.079 million shares of its Common Stock for all of the issued and outstanding
capital stock of First Capital and converted all outstanding options to acquire First Capital common stock into
options to acquire approximately 234,000 shares of Company common stock. First Capital was privately held and
operated thirty-two (32) banking offices in and around Corpus Christi, Houston and Victoria, Texas, five of
which were closed and consolidated with existing banking centers of the Company. As of December 31, 2004,
First Capital had, on a consolidated basis, total assets of $761.6 million, loans of $499.0 million, deposits of
$629.6 million and shareholders’ equity of $61.7 million.

In connection with the purchase, the Company recorded a premium of $116.6 million, of which $13.4
million was identified as core deposit intangibles. The remaining $103.2 million of the premium was recorded as
goodwill.

On August 1, 2004, the Company completed its acquisition of Village Bank and Trust, s.s.b. (“Village”),
Austin, Texas. Under the terms of the agreement, the Company paid approximately $19.1 million in cash for all
of the outstanding shares of capital stock of Village. Village was privately held and operated one (1) banking
office in the Lakeway area of Austin, Texas. As of June 30, 2004, Village had total assets of $110.9 million,
loans of $79.7 million, deposits of $97.3 million and shareholders’ equity of $10.4 million.

In connection with the purchase, the Company recorded a premium of $12.2 million, of which $331,000 was

identified as core deposit intangibles. The remaining $11.9 million of the premium was recorded as goodwill.

On August 1, 2004, the Company completed its acquisition of Liberty Bancshares, Inc. (“Liberty”), Austin,
Texas, pursuant to which Liberty merged into the Company and subsequently, its wholly owned subsidiary,
Liberty Bank, S.S.B., merged into the Bank. Under the terms of the agreement, the Company paid approximately
$8.9 million in cash and issued approximately 1.3 million shares of its Common Stock for all outstanding shares
of capital stock of Liberty and Liberty Bank and all outstanding stock options of Liberty Bank. Liberty was
privately held and operated six (6) banking offices in Austin, Texas, one of which was closed and consolidated
with an existing banking center of the Company in September 2005. As of June 30, 2004, Liberty had, on a
consolidated basis, total assets of $178.7 million, loans of $120.3 million, deposits of $158.9 million and
shareholders’ equity of $16.5 million.

In connection with the purchase, the Company recorded a premium of $28.8 million of which $3.8 million
was identified as core deposit intangibles. The remaining $25.0 million of the premium was recorded as
goodwill.

77

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

3. GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in the carrying amount of the Company’s goodwill and core deposit intangibles for fiscal 2006 and

2005 were as follows:

Balance as of December 31, 2004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less:

Goodwill

Core Deposit
Intangibles

(Dollars in thousands)
$11,492

$153,180

Amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—

(3,912)

Add:

Acquisition of Grapeland Bancshares . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of First Capital Bankers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of Liberty Bancshares . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of Village Bank & Trust, ssb . . . . . . . . . . . . . . . . . . . . . . .

3,923
103,184
1,160
9

1,488
13,393
—
—

Purchase accounting adjustments to prior year acquisitions (deferred tax

adjustments) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

508

—

Balance as of December 31, 2005 . . . . . . . . . . . . . . . . . . . . . . . . .

$261,964

$22,461

Less:

Amortization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—

(4,869)

Add:

Acquisition of Grapeland Bancshares . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of First Capital Bankers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Acquisition of SNB Bancshares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

667
371
160,921

(294)
—
5,734

Purchase accounting adjustments to prior year acquisitions (deferred tax

adjustments) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

416

—

Balance as of December 31, 2006 . . . . . . . . . . . . . . . . . . . . . . . . .

$424,339

$23,032

Gross core deposit intangibles outstanding were $34.6 million at December 31, 2006 and $29.2 million at
December 31, 2005. Purchase accounting adjustments to prior year acquisitions were made to adjust deferred tax
asset and liability balances. Goodwill is recorded on the acquisition date of each entity. The Company may
record subsequent adjustments to goodwill for amounts undeterminable at acquisition date, such as deferred
taxes, and therefore the goodwill amounts reflected in the table above may change accordingly.

Core deposit intangibles are amortized on an accelerated basis over their estimated lives which is 8 years.
Amortization expense related to intangible assets totaled $4.9 million in 2006, $3.9 million in 2005 and
$1.8 million in 2004. The estimated aggregate future amortization expense for intangible assets remaining as of
December 31, 2006 is as follows (dollars in thousands):

2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 4,770
4,424
4,078
3,632
2,988
3,140

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$23,032

78

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

4. CASH AND DUE FROM BANKS

The Bank is required by the Federal Reserve Bank to maintain average reserve balances. “Cash and due
from banks” in the consolidated balance sheets includes amounts so restricted of $19.1 million and $34.5 million
at December 31, 2006 and 2005, respectively.

5. SECURITIES

The amortized cost and fair value of investment securities are as follows:

December 31, 2006

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

Carrying
Value

(Dollars in thousands)

Available for Sale
U.S. Treasury securities and obligations of U.S.

government agencies . . . . . . . . . . . . . . . . . . . .
70% non-taxable preferred stock . . . . . . . . . . . . .
States and political subdivisions . . . . . . . . . . . . .
Collateralized mortgage obligations . . . . . . . . . .
Mortgage-backed securities . . . . . . . . . . . . . . . . .
Qualified Zone Academy Bond . . . . . . . . . . . . . .
Other securities . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 290,629
24,000
14,098
5,352
90,986
8,000
5,804

$ —
—
604
12
172
—
28

$

794
3,795
—
36
729
—
—

$ 289,835
20,205
14,702
5,328
90,429
8,000
5,832

$ 289,835
20,205
14,702
5,328
90,429
8,000
5,832

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 438,869

$ 816

$ 5,354

$ 434,331

$ 434,331

Held to Maturity
U.S. Treasury securities and obligations of U.S.

government agencies . . . . . . . . . . . . . . . . . . . .
States and political subdivisions . . . . . . . . . . . . .
Corporate debt securities . . . . . . . . . . . . . . . . . . .
Collateralized mortgage obligations . . . . . . . . . .
Mortgage-backed securities . . . . . . . . . . . . . . . . .

$ 111,699
30,280
4,507
271,277
738,209

$ 405
255
6
337
616

$

588
53
10
5,260
20,584

$ 111,516
30,482
4,503
266,354
718,241

$ 111,699
30,280
4,507
271,277
738,209

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,155,972

$1,619

$26,495

$1,131,096

$1,155,972

79

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

December 31, 2005

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair
Value

Carrying
Value

(Dollars in thousands)

Available for Sale
U.S. Treasury securities and obligations of U.S.

government agencies . . . . . . . . . . . . . . . . . . . .
70% non-taxable preferred stock . . . . . . . . . . . . .
States and political subdivisions . . . . . . . . . . . . .
Collateralized mortgage obligations . . . . . . . . . .
Mortgage-backed securities . . . . . . . . . . . . . . . . .
Qualified Zone Academy Bond . . . . . . . . . . . . . .
Equity securities . . . . . . . . . . . . . . . . . . . . . . . . .

$ 231,399
24,000
14,102
8,096
130,014
8,000
814

$ 430
—
1,005
45
277
—
—

$ 1,752
5,334
—
34
701
—
—

$ 230,077
18,666
15,107
8,107
129,590
8,000
814

$ 230,077
18,666
15,107
8,107
129,590
8,000
814

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 416,425

$1,757

$ 7,821

$ 410,361

$ 410,361

Held to Maturity
U.S. Treasury securities and obligations of U.S.

government agencies . . . . . . . . . . . . . . . . . . . .
States and political subdivisions . . . . . . . . . . . . .
Corporate debt securities . . . . . . . . . . . . . . . . . . .
Collateralized mortgage obligations . . . . . . . . . .
Mortgage-backed securities . . . . . . . . . . . . . . . . .

$

64,950
17,148
8,550
214,519
857,074

$ 409
173
108
313
721

$

564
31
3
5,805
21,868

$

64,795
17,290
8,655
209,027
835,927

$

64,950
17,148
8,550
214,519
857,074

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,162,241

$1,724

$28,271

$1,135,694

$1,162,241

In estimating other-than-temporary impairment losses, management considers, among other things, (i) the
length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-
term prospects of the issuer and (iii) the intent and ability of the Company to retain its investment in the issuer
for a period of time sufficient to allow for any anticipated recovery in fair value.

Management has the ability and intent to hold its securities until they mature, at which time the Company
will receive full value for the securities. The unrealized losses are largely due to increases in market interest rates
over the yields available at the time the underlying securities were purchased. The fair value is expected to
recover as the investments approach their maturity date or repricing date or if market yields for such investments
decline. Management does not believe any of the securities in an unrealized loss position at December 31, 2006
are impaired due to reasons of credit quality. Accordingly, as of December 31, 2006, management believes the
impairments detailed in the table above are temporary and no impairment loss has been realized in the
Company’s consolidated statements of income.

80

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Securities with unrealized losses segregated by length of time such securities have been in a continuous loss

position at December 31, 2006 were as follows:

Less than 12 Months

More than 12 Months

Total

Estimated
Fair Value

Unrealized
Losses

Estimated
Fair Value

Unrealized
Losses

Estimated
Fair Value

Unrealized
Losses

(Dollars in thousands)

Available for Sale
U.S. Treasury securities and obligations of
U.S. government agencies . . . . . . . . . . .
70% non-taxable preferred stock . . . . . . . .
Collateralized mortgage obligations . . . . .
Mortgage-backed securities . . . . . . . . . . . .

$147,810
—
48
14,277

$311
—

1
69

$142,026
20,205
2,024
48,376

$

483
3,795
35
660

$289,836
20,205
2,072
62,653

$

794
3,795
36
729

Total . . . . . . . . . . . . . . . . . . . . . . . . . .

$162,135

$381

$212,631

$ 4,973

$374,766

$ 5,354

Held to Maturity
U.S. Treasury securities and obligations of
U.S. government agencies . . . . . . . . . . .
States and political subdivisions . . . . . . . .
Corporate debt securities . . . . . . . . . . . . . .
Collateralized mortgage obligations . . . . .
Mortgage-backed securities . . . . . . . . . . . .

$ 27,635
3,891
1,490
31,712
38,236

Total . . . . . . . . . . . . . . . . . . . . . . . . . .

$102,964

$156
22
10
166
203

$557

$ 24,568
2,234
—
154,663
600,635

$

432
31
—
5,094
20,381

$ 52,203
6,125
1,490
186,375
638,871

$

588
53
10
5,260
20,584

$782,100

$25,938

$885,064

$26,495

At December 31, 2006, there were approximately 292 securities in an unrealized loss position for more than

12 months.

The amortized cost and fair value of investment securities at December 31, 2006, by contractual maturity,
are shown below. Actual maturities will differ from contractual maturities because borrowers may have the right
to call or prepay obligations at any time with or without call or prepayment penalties.

December 31, 2006

Held to Maturity

Available for Sale

Amortized
Cost

Fair
Value

Amortized
Cost

Fair
Value

Due in one year or less . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Due after one year through five years . . . . . . . . . . . . . . . . . . . .
Due after five years through ten years . . . . . . . . . . . . . . . . . . .
Due after ten years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

10,748
89,707
3,693
42,338

(Dollars in thousands)
$

10,777
89,477
3,702
42,517

$207,372
95,875
7,384
31,901

$206,716
95,741
7,645
28,472

Subtotal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mortgage-backed securities and collateralized mortgage

146,486

146,473

342,532

338,574

obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1,009,486

984,623

96,337

95,757

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$1,155,972

$1,131,096

$438,869

$434,331

81

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Gross proceeds from the sale of securities classified as available for sale were approximately $6.2 million
for the year ended December 31, 2006. The one sale occurred in conjunction with the SNB acquisition and did
not result in a gain or loss. Any difference in sales price compared to market price was booked as a purchase
accounting adjustment. Gross proceeds from the sale of securities classified as available for sale was
approximately $3.2 million for the year ended December 31, 2005 and resulted in a loss of $79,000 for the same
period.

At December 31, 2006 and 2005, the Company did not own securities of any one issuer (other than the U.S.
government and its agencies) for which aggregate adjusted cost exceeded 10% of the consolidated shareholders’
equity at such respective dates.

Securities with an amortized cost of $1.34 billion and $842.3 million and a fair value of $1.32 billion and
$823.3 million at December 31, 2006 and 2005, respectively, were pledged to collateralize public deposits and
for other purposes required or permitted by law.

6. LOANS

The loan portfolio consists of various types of loans made principally to borrowers located in South and
Southeast Texas, the Houston CMSA, Austin, Corpus Christi and Dallas and is classified by major type as
follows:

December 31,

2006

2005

(Dollars in thousands)

Commercial and industrial
Real estate:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 280,957

$ 222,773

. . . . . . . . . . . . . . . . . .
Construction and land development
1-4 family residential
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Home equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commercial mortgages . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Farmland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Multi-family residential
Agriculture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Consumer
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

433,178
376,996
63,427
803,145
30,925
77,980
26,504
66,675
16,720

206,653
313,184
58,729
566,356
30,920
32,039
25,429
65,185
20,859

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less unearned discount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2,176,507
—

1,542,127
2

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$2,176,507

$1,542,125

The Company had $1.1 million in nonperforming assets at December 31, 2006 compared with $1.4 million
at December 31, 2005. Interest foregone on nonaccrual loans for the years ended December 31, 2006, 2005 and
2004 was $30,000, $35,000 and $54,000, respectively.

82

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The contractual maturity ranges of the commercial and industrial, construction and land development, 1-4
family residential, home equity, and commercial mortgage portfolios and the amount of such loans with
predetermined interest rates and floating rates in each maturity range are summarized in the following table:

December 31, 2006

One Year
or Less

After One
Through
Five Years

After Five
Years

Total

1-4 family residential and home equity . . . . . . . . . . . . . . . . . . .
Commercial and industrial
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commercial mortgages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
Construction and land development

$ 13,967
131,820
50,791
198,390

(Dollars in thousands)
$ 371,770
36,307
505,124
138,108

$ 54,686
112,830
247,230
96,680

$ 440,423
280,957
803,145
433,178

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$394,968

$511,426

$1,051,309

$1,957,703

Loans with a predetermined interest rate. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
Loans with a floating interest rate.

$100,417
294,551

$275,222
236,204

$ 398,438
652,871

$ 774,077
1,183,626

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$394,968

$511,426

$1,051,309

$1,957,703

As of December 31, 2006 and 2005, loans outstanding to directors, officers and their affiliates totaled $7.2
million and $7.6 million, respectively. In the opinion of management, all transactions entered into between the
Company and such related parties have been, and are, in the ordinary course of business, made on the same terms
and conditions as similar transactions with unaffiliated persons.

An analysis of activity with respect to these related-party loans is as follows:

Beginning balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New loans and reclassified related loans . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repayments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ending balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7. ALLOWANCE FOR CREDIT LOSSES

An analysis of activity in the allowance for credit losses is as follows:

Year Ended December 31,

2006

2005

(Dollars in thousands)

$ 7,620
2,757
(3,164)

$ 7,213

$ 7,346
4,045
(3,771)

$ 7,620

Year Ended December 31,

2006

2005

2004

Balance at beginning of year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance acquired in the SNB acquisition . . . . . . . . . . . . . . . . . .
Balance acquired in the First Capital and Grapeland

(Dollars in thousands)
$13,105
—

$17,203
7,054

$10,345
—

acquisitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Balance acquired in the Liberty and Village acquisitions . . . . .
Addition—provision charged to operations . . . . . . . . . . . . . . . .
(Charge-offs) and recoveries:

Loans charged off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loan recoveries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Net charge-offs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

—
—
504

(1,177)
406

(771)

4,028
—
480

(892)
482

(410)

—
2,365
880

(950)
465

(485)

Balance at end of year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$23,990

$17,203

$13,105

83

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

8. PREMISES AND EQUIPMENT

Premises and equipment are summarized as follows:

Year Ended
December 31,

2006

2005

(Dollars in thousands)

Land . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Buildings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Furniture, fixtures and equipment
Construction in progress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 20,298
46,585
15,432
1,395

$ 12,969
39,110
13,993
740

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Less accumulated depreciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

83,710
(20,653)

66,812
(17,568)

Premises and equipment, net

. . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 63,057

$ 49,244

Depreciation expense was $5.0 million, $4.5 million and $2.8 million for the years ended December 31,

2006, 2005 and 2004 respectively.

9. DEPOSITS

Included in interest-bearing deposits are certificates of deposit in amounts of $100,000 or more. These

certificates and their remaining maturities at December 31, 2006 were as follows:

Three months or less . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Greater than three through six months . . . . . . . . . . . . . . . . . . . . . . . . . .
Greater than six through twelve months . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

December 31, 2006

(Dollars in thousands)
$198,330
132,795
142,893
100,275

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$574,293

Interest expense for certificates of deposit in excess of $100,000 was $24.1 million, $14.2 million and $8.5

million, for the years ended December 31, 2006, 2005 and 2004, respectively.

The Company has no brokered deposits and there are no major concentrations of deposits with any one

depositor.

10. BORROWINGS

Other borrowings—The Company utilizes borrowings to supplement deposits to fund its lending and
investment activities. Borrowings consist of funds from the Federal Home Loan Bank (“FHLB”) and
correspondent banks. FHLB advances are considered short-term, overnight borrowings. At December 31, 2006,
the Company had $26.4 million in FHLB borrowings all of which consisted of long-term FHLB notes payable
compared with $55.4 million in FHLB borrowings at December 31, 2005 of which $38.4 million were long-term
FHLB notes payable and $17.0 million were FHLB advances. The $29.0 million decrease was primarily
attributable to the payoff of the FHLB advances of $17.0 million and normal pay downs on the remaining notes.
The weighted average interest rate paid on the FHLB advances at period end was 5.4%. The maturity dates on the

84

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

FHLB notes payable range from the years 2007 to 2028 and have interest rates ranging from 3.32% to 6.48%.
The highest outstanding balance of FHLB advances during 2006 was $116.0 million compared with
$39.0 million during 2005. The Company had no federal funds purchased at December 31, 2006 or 2005.

Securities sold under repurchase agreements—At December 31, 2006, the Company had $47.2 million in
securities sold under repurchase agreements compared with $47.0 million at December 31, 2005, an increase of
$240,000 or 0.5%.

11. INTEREST RATE RISK

The Company is principally engaged in providing real estate, consumer and commercial loans, with interest
rates that are both fixed and variable. These loans are primarily funded through short-term demand deposits and
longer-term certificates of deposit with variable and fixed rates. The fixed real estate loans are more sensitive to
interest rate risk because of their fixed rates and longer maturities.

12. FINANCIAL INSTRUMENTS WITH OFF-BALANCE-SHEET RISK

In the normal course of business, the Company is a party to various financial instruments with off-balance-
sheet risk to meet the financing needs of its customers. These financial instruments include commitments to
extend credit and standby letters of credit, which involve, to varying degrees, elements of credit and interest rate
risk in excess of the amounts recognized in the consolidated balance sheets. The contract or notional amounts of
these instruments reflect the extent of the Company’s involvement in particular classes of financial instruments.

The Company’s exposure to credit loss in the event of nonperformance by the other party to the financial
instrument for commitments to extend credit and standby letters of credit is represented by the contractual
amount of these instruments. The Company uses the same credit policies in making these commitments and
conditional obligations as it does for on-balance-sheet instruments.

The following is a summary of the contract or notional amount of the various financial instruments entered

into by the Company:

December 31,

2006

2005

(Dollars in thousands)

Commitments to extend credit
Standby letters of credit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$509,776
9,696

$335,291
7,434

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any
condition established in the contract. Commitments generally have fixed expiration dates or other termination
clauses and may require payment of a fee. Since many of the commitments are expected to expire without being
fully drawn upon, the total commitment amounts disclosed above do not necessarily represent future cash
funding requirements. At December 31, 2006, $59.7 million of commitments to extend credit have fixed rates
ranging from 3.15% to 18.00%.

Standby letters of credit are written conditional commitments issued by the Company to guarantee the
performance of a customer to a third party. In the event the customer does not perform in accordance with the
terms of the agreement with the third party, the Company would be required to fund the commitment. The
maximum potential amount of future payments the Company could be required to make is represented by the
contractual amount of the commitment. If the commitment is funded, the Company would be entitled to seek

85

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

recovery from the customer. The Company’s policies generally require that standby letter of credit arrangements
contain security and debt covenants similar to those contained in loan agreements.

The Company evaluates customer creditworthiness on a case-by-case basis. The amount of collateral
obtained, if considered necessary by the Company upon extension of credit, is based on management’s credit
evaluation of the customer.

13. INCOME TAXES

The components of the provision for federal income taxes are as follows:

Year Ended December 31,

2006

2005

2004

Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deferred. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Dollars in thousands)
$17,566
6,055

$26,695
5,534

$16,211
1,533

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$32,229

$23,621

$17,744

The provision for federal income taxes differs from the amount computed by applying the federal income

tax statutory rate on income as follows:

Year Ended December 31,

2006

2005

2004

Taxes calculated at statutory rate . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Increase (decrease) resulting from:

Tax-exempt interest
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Qualified Zone Academy Bond credit . . . . . . . . . . . . . . . . . . . .
Dividends received deduction . . . . . . . . . . . . . . . . . . . . . . . . . .
BOLI income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Qualified stock options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amortization of CDI and goodwill
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other, net

(Dollars in thousands)
$25,018

$32,884

$18,358

(773)
(373)
(175)
(175)
251
—
590

(538)
(373)
(126)
(139)
—
—
(221)

(612)
(373)
(286)
—
—
623
34

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$32,229

$23,621

$17,744

86

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Deferred tax assets and liabilities are as follows:

December 31,

2006

2005

(Dollars in thousands)

Deferred tax assets:

Allowance for credit losses . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accrued liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized loss on available for sale securities . . . . . . . . . . . . .
Loss carry forwards (expire 2022) . . . . . . . . . . . . . . . . . . . . . . .
Credit carry forwards (expire 2021) . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 8,376
642
1,588
3,743
739
53

$ 5,917
659
2,165
553
1,402
128

Total deferred tax assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15,141

10,824

Deferred tax liabilities:

Accretion on investments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill and core deposit intangibles . . . . . . . . . . . . . . . . . . . .
Bank premises and equipment
. . . . . . . . . . . . . . . . . . . . . . . . . .
Basis difference in loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investments in partnerships . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepaid expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FHLB dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

(563)
(9,565)
(573)
(60)
(2,048)
(514)
(185)

$ (1,134)
(8,550)
(1,792)
(219)
(2,033)
(389)
(580)

Total deferred tax liabilities. . . . . . . . . . . . . . . . . . . . . . . . .

(13,508)

(14,697)

Net deferred tax assets (liabilities) . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 1,633

$ (3,873)

The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income
during the periods in which those temporary differences become deductible. Management considers the
scheduled reversal of deferred tax liabilities, projected future taxable income, and tax planning strategies in
making this assessment. Based upon the level of historical taxable income and estimates of future taxable income
over the periods for which the deferred tax assets are deductible, management believes it is more likely than not
the Company will realize the benefits of these deductible differences at December 31, 2006. The change in the
Company’s deferred tax assets and liabilities include purchase accounting adjustments.

14. STOCK INCENTIVE PROGRAMS

At December 31, 2006, the Company had three stock-based employee compensation plans and four stock
option plans assumed in connection with acquisitions under which no additional options will be granted. Prior to
2003, the Company accounted for those plans under the recognition and measurement provisions of APB
Opinion No. 25, Accounting for Stock Issued to Employees, and related Interpretations. Effective January 1,
2003, the Company adopted the fair value recognition provisions of SFAS No. 123, Accounting for Stack-Based
Compensation, as provided by SFAS No. 148 for stock-based employee compensation. The Company adopted
SFAS 123(R) on January 1, 2006. The Company recognized $850,000 and $751,000 in stock-based
compensation expense for the year ended December 31, 2006 and 2005, respectively. There was approximately
$47,000 and $46,000 of income tax benefit recorded for the stock-based compensation expense for the same
periods.

During 1995, the Company’s Board of Directors approved a stock option plan (the “1995 Plan”) for
executive officers and key associates to purchase common stock of Bancshares. A total of 675,000 options have

87

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

been granted under the 1995 plan as of December 31, 2006. The maximum number of shares reserved for
issuance pursuant to options granted under the 1995 Plan was 680,000 (after two-for-one and four-for-one stock
splits). Options to acquire a total of 39,000 shares of common stock of Bancshares were outstanding at
December 31, 2006, of which none were exercisable. The 1995 Plan expired on July 31, 2005 and therefore no
additional options may be issued from the 1995 Plan.

During 1998, the Company’s Board of Directors and shareholders approved the Prosperity Bancshares, Inc.
1998 Stock Incentive Plan (the “1998 Plan”) which authorizes the issuance of up to 920,000 (after two-for-one
stock split) shares of the common stock of Bancshares under both “non-qualified” and “incentive” stock options
to employees and “non-qualified” stock options to directors who are not employees. The 1998 Plan also provides
for the granting of restricted stock awards, stock appreciation rights, phantom stock awards and performance
awards on substantially similar terms. A total of 867,100 options have been granted under the 1998 Plan as of
December 31, 2006. Options to purchase a total of 774,400 shares of common stock of Bancshares were
outstanding at December 31, 2006, of which 116,650 shares were exercisable.

In December 2004, the Company’s Board of Directors established the Prosperity Bancshares, Inc. 2004
Stock Incentive Plan (the “2004 Plan”), which was approved by the Company’s shareholders on February 23,
2005. The 2004 Plan authorizes the issuance of up to 1,250,000 shares of Common Stock upon the exercise of
options granted under the 2004 Plan or upon the grant or exercise, as the case may be, of other awards granted
under the 2004 Plan. The 2004 Plan provides for the granting of incentive and nonqualified stock options to
employees and nonqualified stock options to directors who are not employees. The 2004 Plan also provides for
the granting of shares of restricted stock, stock appreciation rights, phantom stock awards and performance
awards on substantially similar terms. A total of 81,500 options and 14,917 shares of restricted stock have been
granted under the 2004 Plan as of December 31, 2006. Options to purchase a total of 81,500 shares of common
stock of Bancshares were outstanding at December 31, 2006, of which none were exercisable. At December 31,
2006, 10,000 shares of restricted stock were outstanding and subject to forfeiture restrictions.

On September 1, 2002, the Company acquired Paradigm Bancorporation. The options to purchase shares of
Paradigm common stock outstanding at the effective time of the transaction were converted into options to
purchase a total of 34,673 shares of Bancshares Common Stock at exercise prices ranging from $8.28 to $11.50
per share. The converted options are governed by the original plan under which they were issued. A total of
4,240 options were outstanding at December 31, 2006.

On November 1, 2003, the Company acquired MainBancorp, Inc. A portion of the options to purchase
shares of MainBancorp common stock outstanding at the effective time of the transaction were converted at the
option of the holder into options to purchase a total of 100,851 shares of Bancshares Common Stock at exercise
prices ranging from $8.03 to $16.26 per share. The converted options are governed by the original plan under
which they were issued. A total of 31,127 options were outstanding at December 31, 2006.

On August 1, 2004, the Company acquired Liberty Bancshares, Inc. A portion of the options to purchase
shares of Liberty Bank common stock outstanding at the effective time of the transaction, at the option of the
holder, were converted into options to purchase a total of 107,948 shares of Bancshares Common Stock at
exercise prices ranging from $3.66 to $7.79 per share. The converted options were governed by the original plan
under which they were issued. No options were outstanding at December 31, 2006.

On March 1, 2005, the Company acquired First Capital Bankers, Inc. The options to purchase shares of First
Capital Bankers, Inc. common stock outstanding at the effective time of the transaction were converted into
options to purchase a total of 233,779 shares of Bancshares Common Stock at exercise prices ranging from $8.60
to $20.26 per share. The converted options are governed by the original plans under which they were issued. A
total of 136,645 options were outstanding at December 31, 2006.

88

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

On April 1, 2006, the Company acquired SNB Bancshares, Inc. The options to purchase shares of SNB
Bancshares, Inc. common stock outstanding at the effective time of the transaction were converted into options to
purchase a total of 467,578 shares of Bancshares Common Stock at exercise prices ranging from $8.15 to $19.65
per share. The converted options are governed by the original plan under which they were issued. A total of
75,172 options were outstanding at December 31, 2006.

Stock options are issued at the current market price on the date of the grant, subject to a pre-determined
vesting period with a contractual term of 10 years. Options assumed in connection with acquisitions have
contractual terms as established in the original option grant agreements entered into prior to acquisition. The fair
value of stock options granted is estimated at the date of grant using the Black-Scholes option-pricing model.
Stock-based compensation expense is recognized ratably over the requisite service period for all awards.

The fair value of options was estimated using an option-pricing model with the following weighted average

assumptions:

Expected life in years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Risk free interest rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Volatility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dividend yield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.66

4.64
4.18% 4.19%
21.28% 21.43%
1.27% 1.30%

December 31,

2006

2005

A summary of changes in outstanding vested and unvested options during the year ended December 31,

2006 is set forth below:

Options outstanding, beginning of period . . . . . . . . . . . . . . .
Options granted(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options exercised . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options outstanding, end of period . . . . . . . . . . . . . . . . . . . .

Number of
Options

(In thousands)
1,169
507
(20)
(514)
1,142

Options exercisable, end of period . . . . . . . . . . . . . . . . . . . . .

364

Weighted
Average
Exercise
Price

Weighted
Average
Remaining
Contractual
Term

Aggregate
Intrinsic
Value

(In thousands)

$21.58
16.47
26.43
15.17
$21.68

$15.04

6.45

4.50

$14,653

$ 7,085

(1) Consists of options to acquire 467,578 shares of Common Stock assumed in connection with the SNB

acquisition.

The weighted-average grant date fair value of the options assumed in connection with the acquisition of
SNB Bancshares, Inc. (“SNB”) in April 2006 was $14.93. The total intrinsic value of the options exercised
during the year ended December 31, 2006 and 2005 was $9.9 million and $2.5 million, respectively. The total
fair value of shares vested and forfeited during the year ended December 31, 2006 was $273,000 and $105,000,
respectively.

89

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

A summary of changes in unvested options is set forth below:

Year Ended December 31,

2006

2005

Unvested options outstanding, beginning of period . . . . . . . . .
Options granted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unvested options forfeited . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options vested . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Number of
Options

(In thousands)
850
39
(20)
(91)

Unvested options outstanding, end of period . . . . . . . . . . . . . .

778

Weighted
Average
Grant
Date Fair
Value

$5.48
7.48
5.44
3.02

$5.93

Weighted
Average
Grant
Date Fair
Value

$4.95
5.49
5.08
2.18

$5.48

Number of
Options

(In thousands)
833
177
(36)
(124)

850

The Company received $7.8 million and $1.1 million in cash from the exercise of stock options during the
years ended December 31, 2006 and 2005, respectively. The increase in cash received for the exercise of stock
options was primarily due to the exercise of options assumed in connection with the SNB acquisition. The
Company assumed 467,578 options with a weighted average exercise price of $15.10, of which 392,406 were
exercised by December 31, 2006. There was no tax benefit realized from exercises of the stock-based
compensation arrangements during the years ended December 31, 2006 and 2005.

As of December 31, 2006, there was $2.4 million of total unrecognized compensation expense related to
stock-based compensation arrangements. That cost is expected to be recognized over a weighted average period
of 2.0 years.

The following table presents information relating to the Company’s stock options outstanding at

December 31, 2006:

Range of Exercise Prices

$ 0.00 - $ 5.00 . . . . . . . . . . . . . . . . . .
$ 5.01 - $10.00 . . . . . . . . . . . . . . . . . .
$10.01 - $15.00 . . . . . . . . . . . . . . . . . .
$15.00 - $20.00 . . . . . . . . . . . . . . . . . .
$20.01 - $25.00 . . . . . . . . . . . . . . . . . .
$25.01 - $31.00 . . . . . . . . . . . . . . . . . .
$25.01 - $31.00 . . . . . . . . . . . . . . . . . .

Options Outstanding

Options Exercisable

Number
Outstanding

Weighted
Average
Exercise Price

Weighted
Average Remaining
Life (years)

Number
Outstanding

Weighted
Average
Exercise Price

24,000
30,034
94,671
260,161
156,718
535,000
41,500

1,142,084

$3.125
8.26
10.22
17.74
21.73
27,26
32,84

$21,68

1.17
5.34
4.83
5.48
4.38
7.92
8.96

6.45

$ —
30,034
59,171
182,911
91,718
—
—

$363,834

$ —
8.26
10.35
17.71
20.39
—
—

$15.04

90

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

15. OTHER NON-INTERST INCOME AND EXPENSE

Other noninterest income and expense totals are presented in the following tables. Components of these
totals exceeding 1% of the aggregate of total net interest income and total non-interest income for any of the
years presented is stated separately.

Years Ended December 31,

2006

2005

2004

(Dollars in thousands)

Other noninterest expense

Communications expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ad valorem and franchise taxes . . . . . . . . . . . . . . . . . . . . . . . . .
Regulatory assessments and FDIC insurance . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 4,339
2,246
716
7,657

$ 3,782
1,594
548
8,487

$ 2,929
1,154
524
7,765

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$14,958

$14,411

$12,372

Other noninterest income

Banking related service fees . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brokered mortgage income . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Income from leased assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 1,358
839
1,075
3,331

$ 1,133
695
895
2,392

$ 1,002
383
—
1,393

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 6,603

$ 5,115

$ 2,778

16. PROFIT SHARING PLAN

The Company has adopted a profit sharing plan pursuant to Section 401(k) of the Internal Revenue
Code whereby the participants may contribute a percentage of their compensation as permitted under the
Code. Matching contributions are made at the discretion of the Company. Presently, the Company matches 50%
of an employee’s contributions, up to 15% of such employee’s compensation, not to exceed the maximum
allowable pursuant
to the Internal Revenue Code and excluding catch-up contributions. Such matching
contributions were approximately $1.0 million, $866,000 and $681,000, for the years ended December 31, 2006,
2005 and 2004, respectively.

17. COMMITMENTS AND CONTINGENCIES

Leases—The following table presents a summary of non-cancelable future operating lease commitments as

of December 31, 2006 (dollars in thousands):

2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thereafter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 2,885
2,349
1,882
1,442
962
2,269

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$11,789

It is expected that in the normal course of business, expiring leases will be renewed or replaced by leases on

other property or equipment.

91

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Rent expense under all noncancelable operating lease obligations aggregated approximately $3.4 million for
the year ended December 31, 2006, $3.0 million for the year ended December 31, 2005 and $1.8 million for the
year ended December 31, 2004.

Litigation—The Company has been named as a defendant in various legal actions arising in the normal
course of business. In the opinion of management, after reviewing such claims with outside counsel, resolution of
such matters will not have a materially adverse impact on the consolidated financial statements.

18. REGULATORY MATTERS

The Company and the Bank are subject to various regulatory capital requirements administered by the
federal banking agencies. Any institution that fails to meet its minimum capital requirements is subject to actions
by regulators that could have a direct material effect on the Company’s and the Bank’s financial statements.
Under the capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must
meet specific capital guidelines based on the Bank’s assets, liabilities and certain off- balance-sheet items as
calculated under regulatory accounting practices. The Company’s and the Bank’s capital amounts and the Bank’s
classification under the regulatory framework for prompt corrective action are also subject to qualitative
judgements by the regulators about the components, risk weightings and other factors.

To meet the capital adequacy requirements, the Company and the Bank must maintain minimum capital
amounts and ratios as defined in the regulations. Management believes, as of December 31, 2006 that the
Company and the Bank met all capital adequacy requirements to which they are subject.

At December 31, 2006, the most recent notification from the FDIC categorized the Bank as “well
capitalized” under the regulatory framework for prompt corrective action. To be categorized as well capitalized
the Bank must maintain minimum total risk-based, Tier I risk-based and Tier I leverage ratios as set forth in the
table. There have been no conditions or events since that notification which management believes have changed
the Bank’s category.

92

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The following is a summary of the Company’s and the Bank’s capital ratios at December 31, 2006 and

2005:

Actual

For Capital
Adequacy Purposes

To Be Categorized As
Well Capitalized Under
Prompt Corrective
Action Provisions

Amount

Ratio

Amount

Ratio

Amount

Ratio

(Dollars in thousands)

CONSOLIDATED:
As of December 31, 2006:

Total Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

$339,033

14.55% $186,361

8.00%

N/A

N/A

Tier I Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

315,043

13.52

93,180

4.00

N/A

N/A

Tier I Capital

(to Average Tangible Assets) . . . . . . . . . . .

315,043

7.76

121,798

3.00

N/A

N/A

As of December 31, 2005:

Total Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

$271,470

16.37% $132,636

8.0%

N/A

N/A

Tier I Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

254,267

15.34

66,318

4.0

N/A

N/A

Tier I Capital

(to Average Tangible Assets) . . . . . . . . . . .

254,267

7.83

97,366

3.0

N/A

N/A

Actual

For Capital
Adequacy Purposes

To Be Categorized As
Well Capitalized Under
Prompt Corrective
Action Provisions

Amount

Ratio

Amount

Ratio

Amount

Ratio

(Dollars in thousands)

PROSPERITY BANK® ONLY:
As of December 31, 2006:

Total Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

$332,556

14.31% $185,915

8.00% $232,394

10.00%

Tier I Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

308,566

13.28

92,958

4.00

139,436

6.00

Tier I Capital

(to Average Tangible Assets) . . . . . . . . . . .

308,566

7.61

121,659

3.00

202,764

5.00

As of December 31, 2005:

Total Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

$265,486

16.08% $132,105

8.0% $165,131

10.0%

Tier I Capital

(to Risk Weighted Assets)

. . . . . . . . . . . . .

248,283

15.04

66,052

4.0

99,079

Tier I Capital

(to Average Tangible Assets) . . . . . . . . . . .

248,283

7.67

97,165

3.0

161,941

6.0

5.0

Dividends paid by Bancshares and the Bank are subject to restrictions by certain regulatory agencies.
Dividends paid by Bancshares during the years ended December 31, 2006, 2005 and 2004 were $13.0 million,
$9.6 million and $6.7 million, respectively. Dividends paid by the Bank to Bancshares during the years ended
December 31, 2006, 2005 and 2004 were $102.0 million, $6.0 million and $40.0 million, respectively.

93

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

19. DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS

Disclosures of the estimated fair value amounts of financial instruments have been determined by the
Company using available market information and appropriate valuation methodologies. However, considerable
judgment is necessarily required in interpreting market data to develop the estimates of fair value. Accordingly,
the estimates presented herein are not necessarily indicative of the amounts the Company could realize in a
current market exchange. The use of different market assumptions and/or estimation methodologies could have a
material effect on the estimated fair value amounts.

The following methods and assumptions were used to estimate the fair value of each class of financial

instruments for which it is practicable to estimate that value:

Cash and Cash Equivalents—For these short-term instruments, the carrying amount is a reasonable

estimate of fair value.

Interest-Bearing Deposits in Financial Institutions—The carrying amount is a reasonable estimate of fair

value.

Federal Funds Sold—The carrying amount is a reasonable estimate of fair value.

Securities—For securities held as investments, fair value equals quoted market price, if available. If a

quoted market price is not available, fair value is estimated using quoted market prices for similar securities.

Loans Held for Investment—For certain homogeneous categories of loans (such as some residential
mortgages and other consumer loans), fair value is estimated by discounting the future cash flows using the risk-
free Treasury rate for the applicable maturity, adjusted for servicing and credit risk. The carrying value of
variable rate loans approximates fair value because the loans reprice frequently to current market rates.

Deposits—The fair value of demand deposits, savings accounts and certain money market deposits is the
amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is
estimated using the rates currently offered for deposits of similar remaining maturities.

Junior Subordinated Debentures—The fair value of the junior subordinated debentures was calculated
using the quoted market prices, if available. If a quoted market prices are not available, fair value is estimated
using quoted market prices for similar subordinated debentures.

Other Borrowings—Rates currently available to the Company for debt with similar terms and remaining

maturities are used to estimate the fair value of existing debt using a discounted cash flows methodology.

Securities Sold Under Repurchase Agreements—The fair value of securities sold under repurchase

agreements is the amount payable on demand at the reporting date.

Federal Home Loan Bank Notes Payable—Rates currently available to the Company for debt with similar
terms and remaining maturities are used to estimate the fair value of existing debt using a discounted cash flows
methodology.

Off-Balance Sheet Financial Instruments—The fair value of commitments to extend credit and standby
letters of credit is estimated using the fees currently charged to enter into similar agreements, taking into account
the remaining terms of the agreement and the present creditworthiness of the counterparties.

94

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The estimated fair values of the Company’s interest-earning financial instruments are as follows:

December 31,

2006

2005

Carrying
Amount

Estimated
Fair
Value

Carrying
Amount

(Dollars in thousands)

Estimated
Fair
Value

Financial assets:

Cash and due from banks . . . . . . . . . . . . . . . . . . . . . .
Interest bearing deposits in financial institutions . . . .
Federal funds sold . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Held to maturity securities . . . . . . . . . . . . . . . . . . . . .
Available for sale securities . . . . . . . . . . . . . . . . . . . .
Loans held for investment . . . . . . . . . . . . . . . . . . . . . .
Less allowance for credit losses . . . . . . . . . . . . . . . . .

$ 116,078
397
153,643
1,155,972
434,331
2,176,507
(23,990)

$ 116,078
397
153,643
1,131,096
434,331
2,151,957
(23,990)

$

91,518
297
5,846
1,162,241
410,361
1,542,125
(17,203)

$

91,518
297
5,846
1,135,694
410,361
1,526,419
(17,203)

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$4,012,938

$3,963,512

$3,195,185

$3,152,932

Financial liabilities:

Deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junior subordinated debentures . . . . . . . . . . . . . . . . . .
Other borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securities sold under repurchase agreements . . . . . . .
Federal Home Loan Bank notes payable . . . . . . . . . . .

$3,725,678
100,519
—
47,225
26,408

$3,724,984
104,329
—
47,225
26,967

$2,920,318
75,775
17,000
46,985
38,404

$2,917,559
74,110
17,000
46,985
38,792

Total

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$3,899,830

$3,903,505

$3,098,482

$3,094,446

The differences in fair value and carrying value of commitments to extend credit and standby letters of

credit were not material at December 31, 2006 and 2005.

The fair value estimates presented herein are based on pertinent information available to management as of
the dates indicated. Although management is not aware of any factors that would significantly affect the
estimated fair value amounts, such amounts have not been comprehensively revalued for purposes of these
financial statements since those dates and, therefore, current estimates of fair value may differ significantly from
the amounts presented herein.

20. JUNIOR SUBORDINATED DEBENTURES

At December 31, 2006 and 2005,

the Company had outstanding $100.5 million and $75.8 million,
respectively, in junior subordinated debentures issued to the Company’s subsidiary trusts. The increase of
$24.7 million was due to the Company’s assumption of $30.9 million in junior subordinated debentures issued by
SNB to its three subsidiary trusts, partially offset by the redemption of $6.2 million junior subordinated
debentures issued to Paradigm Capital Trust II on February 28, 2006.

95

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

A summary of pertinent information related to the Company’s eight issues of junior subordinated debentures

outstanding at December 31, 2006 is set forth in the table below:

Description

Issuance Date

Trust
Preferred
Securities
Outstanding

Prosperity Statutory Trust II

. . . . . . . . . .

July 31, 2001

$15,000,000

Prosperity Statutory Trust III . . . . . . . . . . Aug. 15, 2003

12,500,000

Prosperity Statutory Trust IV . . . . . . . . . . Dec. 30, 2003

12,500,000

First Capital Statutory Trust I(5) . . . . . . . . Mar. 26, 2002

20,000,000

First Capital Statutory Trust II(5)

. . . . . . . Sept. 26, 2002

7,500,000

SNB Statutory Trust II(6)

. . . . . . . . . . . . . Mar. 26, 2003

10,000,000

SNB Capital Trust III(6)

. . . . . . . . . . . . . . Mar. 27, 2003

10,000,000

SNB Capital Trust IV(6) . . . . . . . . . . . . . . Sept. 25, 2003

10,000,000

Junior
Subordinated
Debt Owed
to Trusts

Maturity
Date(2)

$15,464,000

July 31, 2031

12,887,000

Sept. 17, 2033

12,887,000 Dec. 30, 2033

20,619,000 Mar. 26, 2032

7,732,000

Sept. 26, 2032

10,310,000 Mar. 26, 2033

10,310,000 Mar. 27, 2033

10,310,000

Sept. 25, 2033

Interest Rate(1)

3-month LIBOR
+ 3.58%, not to
exceed 12.50%

6.50%(3)

6.50%(4)

3-month LIBOR
+ 3.60%

3-month LIBOR
+ 3.40%

3-month LIBOR
+ 3.15%

3-month LIBOR
+ 3.15%

3-month LIBOR
+ 3.00%

(1) The 3-month LIBOR in effect as of December 31, 2006 was 5.36%.
(2) The debentures are callable five years from issuance date.
(3) The debentures bear a fixed interest rate until September 17, 2008, when the rate begins to float on a quarterly basis

based on the three-month LIBOR plus 3.00%.

(4) The debentures bear a fixed interest rate until December 30, 2008, when the rate begins to float on a quarterly basis

based on the three-month LIBOR plus 2.85%.

(5) Assumed in connection with the First Capital acquisition on March 1, 2005.
(6) Assumed in connection with the SNB acquisition on April 1, 2006.

On February 28, 2006, the Company redeemed in full the $6.2 million in junior subordinated debentures
issued to Paradigm Capital Trust II. Paradigm Capital Trust II in turn redeemed in full the trust preferred
securities and common securities it issued.

Each of the trusts is a capital or statutory business trust organized for the sole purpose of issuing trust
securities and investing the proceeds in the Company’s junior subordinated debentures. The preferred trust
securities of each trust represent preferred beneficial interests in the assets of the respective trusts and are subject
to mandatory redemption upon payment of the junior subordinated debentures held by the trust. The common
securities of each trust are wholly-owned by the Company. Each trust’s ability to pay amounts due on the trust
preferred securities is solely dependent upon the Company making payment on the related junior subordinated
debentures. The debentures, which are the only assets of each trust, are subordinate and junior in right of
payment
to all of the Company’s present and future senior indebtedness. The Company has fully and
unconditionally guaranteed each trust’s obligations under the trust securities issued by each respective trust to the
extent not paid or made by each trust, provided such trust has funds available for such obligations.

96

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Under the provisions of each issue of the debentures, the Company has the right to defer payment of interest
on the debentures at any time, or from time to time, for periods not exceeding five years. If interest payments on
either issue of the debentures are deferred, the distributions on the applicable trust preferred securities and
common securities will also be deferred.

21. PARENT COMPANY ONLY FINANCIAL STATEMENTS

PROSPERITY BANCSHARES, INC.
(Parent Company Only)

CONDENSED BALANCE SHEETS

December 31,

2006

2005

(Dollars in thousands)

ASSETS

Cash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investment in subsidiary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investment in Prosperity Statutory Trust II . . . . . . . . . . . . . . . . . . . . . . . .
Investment in Prosperity Statutory Trust III . . . . . . . . . . . . . . . . . . . . . . .
Investment in Prosperity Statutory Trust IV . . . . . . . . . . . . . . . . . . . . . . .
Investment in Paradigm Capital Trust II . . . . . . . . . . . . . . . . . . . . . . . . . .
Investment in First Capital Statutory Trust I . . . . . . . . . . . . . . . . . . . . . . .
Investment in First Capital Statutory Trust II . . . . . . . . . . . . . . . . . . . . . .
Investment in SNB Statutory Trust II . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investment in SNB Capital Trust III . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Investment in SNB Capital Trust IV . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Goodwill, net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

2,727
751,512
464
387
387
—
619
232
310
310
310
3,983
4,326

$

2,166
528,262
464
387
387
186
619
232
—
—
—
3,983
4,355

TOTAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$765,567

$541,041

LIABILITIES AND SHAREHOLDERS’ EQUITY
LIABILITIES:

Accrued interest payable and other liabilities . . . . . . . . . . . . . . . . . . . . . .
Junior subordinated debentures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$

637
100,519

Total liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

101,156

$

549
75,775

76,324

SHAREHOLDERS’ EQUITY:

Common stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capital surplus.
Retained earnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unrealized loss on available for sale securities, net of tax benefit . . . . . .
Less treasury stock, at cost, 37,088 shares . . . . . . . . . . . . . . . . . . . . . . . .

32,830
425,557
209,581
(2,950)
(607)

27,858
280,525
160,883
(3,942)
(607)

Total shareholders’ equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

664,411

464,717

TOTAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$765,567

$541,041

97

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

PROSPERITY BANCSHARES, INC.
(Parent Company Only)

CONDENSED STATEMENTS OF INCOME

For the Years Ended December 31,

2006

2005

2004

(Dollars in thousands)

OPERATING INCOME:

Dividends from subsidiaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$102,000
224

$ 6,000
142

$40,000
112

Total income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

102,224

6,142

40,112

OPERATING EXPENSE:

Junior subordinated debentures interest expense . . . . . . . . . . . . . . . . . . . . . .
Stock-based compensation expense (includes restricted stock) . . . . . . . . . . .
Other expenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Total operating expense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7,592
850
333

8,775

4,895
751
353

5,999

4,046
141
228

4,415

INCOME BEFORE INCOME TAX BENEFIT AND EQUITY IN

UNDISTRIBUTED EARNINGS OF SUBSIDIARIES . . . . . . . . . . . . . . . . . . .
FEDERAL INCOME TAX BENEFIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

93,449
2,783

143
1,833

35,697
1,498

INCOME BEFORE EQUITY IN UNDISTRIBUTED EARNINGS OF

SUBSIDIARIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

96,232

1,976

37,195

(DISTRIBUTIONS IN EXCESS OF EARNINGS) EQUITY IN

UNDISTRIBUTED EARNINGS OF SUBSIDIARIES . . . . . . . . . . . . . . . . . . .

(34,507)

45,884

(2,488)

NET INCOME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$ 61,725

$47,860

$34,707

98

PROSPERITY BANCSHARES, INC.® AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

PROSPERITY BANCSHARES, INC.
(Parent Company Only)

CONDENSED STATEMENTS OF CASH FLOWS

CASH FLOWS FROM OPERATING ACTIVITIES:

Net income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments to reconcile net income to net cash provided by operating

activities:

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equity in undistributed earnings of subsidiaries . . . . . . . . . . . . . . . . .
Stock based compensation expense (includes restricted stock) . . . . . .
Decrease (increase) in other assets . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Decrease) increase in accrued interest payable and other

For the Years Ended December 31,

2006

2005

2004

(Dollars in thousands)

$ 61,725

$ 47,860

$ 34,707

34,507
850
1,367

(45,883)
751
(277)

2,488
141
(1,508)

liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(59)

(117)

38

Net cash provided by operating activities . . . . . . . . . . . . . . . . . .

98,390

2,334

35,866

CASH FLOWS FROM INVESTING ACTIVITIES:

Cash paid for acquisitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cash acquired from acquisitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Capital contribution to subsidiary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(93,275)
6,688
(7)

Net cash (used in) provided by investing activities . . . . . . . . . . .

(86,594)

—
3,757
—

3,757

(28,016)
—
(10)

(28,026)

CASH FLOWS FROM FINANCING ACTIVITIES:

Proceeds from stock option exercises . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Redemption of junior subordinated debentures (net) . . . . . . . . . . . . . . . . . .
Payments of cash dividends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7,792
(6,000)
(13,027)

1,085
—
(9,624)

1,046
(12,000)
(6,670)

Net cash used in financing activities . . . . . . . . . . . . . . . . . . . . . .

(11,235)

(8,539)

(17,624)

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS . . .
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD . . . . . . . . . .

561
2,166

(2,448)
4,614

(9,784)
14,398

CASH AND CASH EQUIVALENTS, END OF PERIOD . . . . . . . . . . . . . . . . .

$ 2,727

$ 2,166 $ 4,614

22. SUBSEQUENT EVENT

On January 31, 2007, the Company completed its acquisition of Texas United Bancshares, Inc., La Grange,
Texas (“TXUI”). Under the terms of the merger agreement, TXUI was merged into the Company and
subsequently, each of TXUI’s wholly owned subsidiary banks, State Bank, GNB Financial, n.a., Gateway
National Bank and Northwest Bank, was merged with the Bank. The Company issued approximately
10.770 million shares of its common stock for all of the issued and outstanding capital stock of TXUI. In
addition, options to acquire 179,956 shares of TXUI common stock were converted into options to acquire
179,956 shares of Company common stock. In connection with the acquisition, the Company assumed $44.8
million in junior subordinated debentures issued to five subsidiary trusts. TXUI was publicly traded and operated
forty-three (43) banking offices in Texas. As of December 31, 2006, TXUI had, on a consolidated basis, total
assets of $1.806 billion, loans of $1.212 billion, deposits of $1.362 billion and shareholders’ equity of $161.9
million.

99

Exhibit index:

Each exhibit marked with an asterisk is filed or furnished, as indicated, with this Annual Report on

Form 10-K.
Exhibit
Number(1)

Description

3.1 — Amended and Restated Articles of Incorporation of Prosperity (incorporated herein by reference to

Exhibit 3.1 to the Company’s Registration Statement on Form S-1 (Registration No. 333-63267))

3.2 — Articles of Amendment to Amended and Restated Articles of Incorporation of the Company
(incorporated herein by reference to Exhibit 3.2 to the Company’s Quarterly Report on Form 10-Q
for the quarter ended March 31, 2006)

3.3 — Amended and Restated Bylaws of Prosperity (incorporated herein by reference to Exhibit 3.1 to the

Company’s Current Report on Form 8-K filed April 20, 2006)

4.1 — Form of certificate representing shares of Prosperity common stock (incorporated herein by
reference to Exhibit 4 to the Company’s Registration Statement on Form S-1 (Registration No. 333-
63267))

4.2 — Indenture dated as of July 31, 2001 by and between Prosperity Bancshares, Inc., as Issuer, and State
Street Bank and Trust Company of Connecticut, National Association, with respect to the Floating
Rate Junior Subordinated Deferrable Interest Debentures of Prosperity Bancshares,
Inc.
(incorporated herein by reference to Exhibit 4.1 to the Company’s Quarterly Report on Form 10-Q
for the quarter ended September 30, 2001)

4.3 — Amended and Restated Declaration of Trust of Prosperity Statutory Trust II dated as of July 31,
2001 (incorporated herein by reference to Exhibit 4.2 to the Company’s Quarterly Report on Form
10-Q for the quarter ended September 30, 2001)

4.4 — Guarantee Agreement dated as of July 31, 2001 by and between Prosperity Bancshares, Inc. and
State Street Bank and Trust Company of Connecticut, National Association (incorporated herein by
reference to Exhibit 4.3 to the Company’s Quarterly Report on Form 10-Q for the quarter ended
September 30, 2001)

10.1† — Prosperity Bancshares, Inc. 1995 Stock Option Plan (incorporated herein by reference to Exhibit
10.1 to the Company’s Registration Statement on Form S-1 (Registration No. 333-63267))

10.2† — Prosperity Bancshares, Inc. 1998 Stock Incentive Plan (incorporated herein by reference to Exhibit
10.2 to the Company’s Registration Statement on Form S-1 (Registration No. 333-63267))

10.3† — Prosperity Bancshares, Inc. 2004 Stock Incentive Plan (incorporated herein by reference to Exhibit
10.3 to the Company’s Registration Statement on Form S-4 (Registration No. 333-121767))

10.4† — Amended and Restated Employment Agreement by and between Prosperity Bank and David Zalman
(incorporated herein by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K
filed January 24, 2005)

10.5† — Amended and Restated Employment Agreement by and between Prosperity Bank and
H. E. Timanus, Jr. (incorporated herein by reference to Exhibit 10.2 to the Company’s Current
Report on Form 8-K filed January 24, 2005)

10.6† — Employment Agreement, dated as of August 10, 2006, by and among Prosperity Bancshares, Inc.,
Prosperity Bank and James D. Rollins III (incorporated herein by reference to Exhibit 10.1 to the
Company's Current Report on Form 8-K filed on August 15, 2006)

10.7† — Employment Agreement, dated as of August 10, 2006, by and among Prosperity Bancshares, Inc.,
Prosperity Bank and David Hollaway (incorporated herein by reference to Exhibit 10.2 to the
Company's Current Report on Form 8-K filed on August 15, 2006)

100

Exhibit
Number(1)

Description

10.8† — Non-Competition, Non-Solicitation and Confidentiality Agreement, dated as of January 31, 2007, by
and between L. Don Stricklin, Texas United and Prosperity (incorporated herein by reference to
Exhibit 10.1 to the Company's Current Report on Form 8-K filed on February 2, 2007)

10.9† — First Amendment to Employment and Non-Competition Agreement, dated as of September 19,
2006, by and between Prosperity Bank and Peter E. Fisher (incorporated herein by reference to
Exhibit 10.1 to the Company's Current Report on Form 8-K filed on September 21, 2006)

10.10† — Employment and Non-Competition Agreement, dated as of September 1, 2002, by and between
Prosperity Bank and Peter E. Fisher (incorporated herein by reference to Exhibit 10.2 to the
Company's Current Report on Form 8-K filed on September 21, 2006)

10.11† — Termination Agreement dated as of December 8, 2005 by and among Prosperity Bancshares, Inc.,
Prosperity Bank and D. Michael Hunter (incorporated herein by reference to Exhibit 10.1 to the
Company’s Current Report on Form 8-K filed December 9, 2005)

10.12† — Non-Competition Agreement dated as of December 8, 2005 by and among Prosperity Bancshares,
Inc., Prosperity Bank and D. Michael Hunter (incorporated herein by reference to Exhibit 10.2 to the
Company’s Current Report on Form 8-K filed December 9, 2005)

10.13† — Paradigm Bancorporation, Inc. 1999 Stock Incentive Plan (incorporated herein by reference to

Exhibit 4.2 to the Company’s Registration Statement on Form S-8 (Registration No. 333-100815))

10.14† — MainBancorp, Inc. 1996 Employee Stock Option Plan (incorporated herein by reference to Exhibit
4.2 to the Company’s Registration Statement on Form S-8 (Registration No. 333-110755))

10.15† — Form of MainBancorp, Inc. Non-Qualified Stock Option Agreement (incorporated herein by
reference to Exhibit 4.3 to the Company’s Registration Statement on Form S-8 (Registration No.
333-110755))

10.16† — First Capital Bankers, Inc. 1996 Executive Stock Option Plan (incorporated herein by reference to
Exhibit 10.11 to the Company’s Annual Report on Form 10-K for the year ended December 31,
2004)

10.17† — First Capital Bankers, Inc. Amended and Restated 1998 Stock Option Plan (incorporated herein by
reference to Exhibit 10.12 to the Company’s Annual Report on Form 10-K for the year ended
December 31, 2004)

10.18† — SNB Bancshares, Inc. 2002 Stock Option Plan, as amended and restated (incorporated herein by
reference to Exhibit 4.2 to the Company's Registration Statement on Form S-8 (Registration No.
333-133214))

10.19† — Texas United Bancshares, Inc. 1998 Incentive Stock Option Plan (incorporated herein by reference
to Exhibit 4.2 to the Company's Registration Statement on Form S-8 (Registration No. 333-140425))

10.20† — Texas United Bancshares, Inc. 2004 Stock Incentive Plan (incorporated herein by reference to

Exhibit 4.3 to the Company's Registration Statement on Form S-8 (Registration No. 333-140425))

10.21† — 1998 Incentive Stock Option Plan for Gateway Holding Company, Inc. (incorporated herein by
reference to Exhibit 4.4 to the Company's Registration Statement on Form S-8 (Registration No.
333-140425))

10.22† — Stock Option Agreement dated July 1, 1998 by and between Texas United Bancshares, Inc. and L.
Steve Stapp (incorporated herein by reference to Exhibit 4.5 to the Company's Registration
Statement on Form S-8 (Registration No. 333-140425))

21.1

*— Subsidiaries of Prosperity Bancshares, Inc.

101

Exhibit
Number(1)

Description

23.1* — Consent of Deloitte & Touche LLP

31.1* — Certification of the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange

Act of 1934, as amended.

31.2* — Certification of the Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange

Act of 1934, as amended.

32.1**— Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002.

32.2**— Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, adopted pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002.

† Management contract or compensatory plan or arrangement.
*
Filed with this Annual Report on Form 10-K.
** Furnished with this Annual Report on Form 10-K.
(1) The Company has other

long-term debt

forth in
Section 601(b)(4)(iii)(A) of Regulation S-K. The Company hereby agrees to furnish a copy of such
agreements to the Commission upon request.

exclusion set

agreements

that meet

the

102

Subsidiaries of Prosperity Bancshares, Inc.  

Exhibit 21.1 

Name of Subsidiary 
Prosperity Holdings of Delaware, LLC
Prosperity Bank®
Prosperity Statutory Trust II
Prosperity Statutory Trust III
Prosperity Statutory Trust IV
Prosperity Interim Corporation
MainCorp Leasing Co.
First Capital (TX) Statutory Trust I
First Capital (TX) Statutory Trust II
SNB Statutory Trust II
SNB Capital Trust III
SNB Capital Trust IV
TXUI Statutory Trust I
TXUI Statutory Trust II
TXUI Statutory Trust III
TXUI Statutory Trust IV
Gateway Statutory Trust I

Jurisdiction 
of 
Incorporation 
Delaware
Texas
Connecticut
Connecticut
Connecticut
Texas
Texas
Connecticut
Connecticut
Connecticut
Connecticut
Connecticut
Connecticut
Delaware
Connecticut
Delaware
Connecticut

  
 
  
  
  
  
  
  
 
  
  
  
  
  
  
 
  
  
  
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM  

We consent to the incorporation by reference in (i) Registration Statements No. 333-78139, 333-92997, 333-100815, 

333-110755, 333-123366, 333-123367, 333-133214, and 333-140425 of Prosperity Bancshares, Inc. on Form S-8 and (ii) Registration 
Statements No. 333-93857 and 333-136848 of Prosperity Bancshares, Inc. on Form S-3 of our reports dated February 27, 2007, relating 
to the consolidated financial statements of Prosperity Bancshares, Inc. and subsidiaries and management’s report on the effectiveness of 
internal control over financial reporting appearing in this Annual Report on Form 10-K of Prosperity Bancshares, Inc. for the year ended 
December 31, 2006.  

Exhibit 23.1 

    /s/ Deloitte & Touche LLP  

Houston, Texas  
February 27, 2007  

1.

2.

3.

4.

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002  

Exhibit 31.1 

I, David Zalman, certify that:  
I have reviewed this Annual Report on Form 10-K of Prosperity Bancshares, Inc.; 

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact 
necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading 
with respect to the period covered by this report; 

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all 
material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods 
presented in this report; 

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures 
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting for the registrant and 
have: 

a)

b)

c)

d)

designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under 
our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is 
made known to us by others within those entities, particularly during the period in which this report is being prepared; 

designed such internal control over financial reporting, or caused such internal control over financial reporting to be 
designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the 
preparation of financial statements for external purposes in accordance with generally accepted accounting principles; 

evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this 
report based on such evaluation; and 

disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the 
registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has 
materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and 

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons 
performing the equivalent functions): 

a)

b)

all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting 
which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial 
information; and 

any fraud, whether or not material, that involves management or other employees who have a significant role in the 
registrant’s internal control over financial reporting. 

Date: March 1, 2007  

        /s/ David Zalman  

David Zalman  
Chairman of the Board and Chief Executive Officer  

  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
1.

2.

3.

4.

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002  

Exhibit 31.2 

I, David Hollaway, certify that:  
I have reviewed this Annual Report on Form 10-K of Prosperity Bancshares, Inc.; 

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact 
necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading 
with respect to the period covered by this report; 

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all 
material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods 
presented in this report; 

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures 
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting for the registrant and 
have: 

a)

b)

c)

d)

designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under 
our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is 
made known to us by others within those entities, particularly during the period in which this report is being prepared; 

designed such internal control over financial reporting, or caused such internal control over financial reporting to be 
designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the 
preparation of financial statements for external purposes in accordance with generally accepted accounting principles; 

evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our 
conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this 
report based on such evaluation; and 

disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the 
registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has 
materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and 

5.

The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over 
financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons 
performing the equivalent functions): 

a)

b)

all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting 
which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial 
information; and 

any fraud, whether or not material, that involves management or other employees who have a significant role in the 
registrant’s internal control over financial reporting. 

Date: March 1, 2007  

        /s/ David Hollaway  

David Hollaway  
Chief Financial Officer  

  
  
  
  
  
  
  
  
  
  
  
 
 
 
 
 
 
Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to  
Section 906 of the Sarbanes-Oxley Act of 2002  

Exhibit 32.1 

In connection with this Annual Report of Prosperity Bancshares, Inc. (the “Company”) on Form 10-K for the period ending 
December 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David Zalman, 
Chairman of the Board and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant 
to Section 906 of the Sarbanes-Oxley Act of 2002, that:  

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and  

2. The information contained in the Report fairly presents, in all material respects, the financial condition and operating results of the 
Company.  

        /s/ David Zalman  

David Zalman  
Chairman of the Board and Chief Executive Officer  
March 1, 2007  

Certification Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to  
Section 906 of the Sarbanes-Oxley Act of 2002  

Exhibit 32.2 

In connection with this Annual Report of Prosperity Bancshares, Inc. (the “Company”) on Form 10-K for the period ending 
December 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David Hollaway, 
Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the 
Sarbanes-Oxley Act of 2002, that:  
1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and  

2. The information contained in the Report fairly presents, in all material respects, the financial condition and operating results of the 
Company.  

        /s/ David Hollaway  

David Hollaway  
Chief Financial Officer  
March 1, 2007