The document provides unaudited financial information for the 1st quarter of 2012 and contains forward-looking statements. It discusses First Financial Bankshares, Inc., a $4.2 billion financial holding company based in Abilene, Texas with 11 separately chartered banks and over 50 locations. The company has received several recognitions and its unique business model centers around its community bank charters which focus on local markets and customers.

1. 1st Quarter 2012

2. Forward Looking Statement
The numbers, as of and for the year ended March 31, 2012, contained within this presentation are
unaudited. Certain statements contained herein may be considered “forward-looking statements” as
defined in the Private Securities Litigation Reform Act of 1995. These statements are based upon the
belief of the Company’s management, as well as assumptions made beyond information currently
available to the Company’s management and, may be, but not necessarily are identified by such words
as “expect”, “plan”, “anticipate”, “target”, “forecast” and “goal”. Because such “forward-looking
statements” are subject to risks and uncertainties, actual results may differ materially from those
expressed or implied by such forward-looking statements. Factors that could cause actual results to
differ materially from the Company’s expectations include competition from other financial institutions
and financial holding companies; the effects of and changes in trade, monetary and fiscal policies and
laws, including interest rate policies of the Federal Reserve Board; changes in the demand for loans;
fluctuations in value of collateral and loan reserves; inflation, interest rate, market and monetary
fluctuations; changes in consumer spending, borrowing and savings habits; and acquisitions and
integration of acquired businesses, and similar variables. Other key risks are described in the
Company’s reports filed with the Securities and Exchange Commission, which may be obtained under
“Investor Relations-Documents/Filings” on the Company’s web site or by writing or calling the Company
at 325.627.7155. The Company does not undertake any obligation to update publicly or revise any
forward-looking statements herein because of new information, future events or otherwise.

3. Who We Are
 $4.2 billion financial holding company
headquartered in Abilene, Texas
 Group of 11 separately chartered banks
 122-year history
 Growth markets include 50 mile radius of
the larger cities of Texas
3

4. 4

5. Recognitions
 KBW Honor Roll – One of Forty banks named – March 2012
 SNL Financial #4 Best Performing Community Bank ($500M -
$5B) – March 2012
 Nifty 50: Bank Director Magazine - #2 – Based on Return on
Equity / Average Tangible Equity
 Ranked #2 in Texas and #7 in the United States by J.D. Power
and Associates 2011 Retail Banking Customer Satisfaction
Study – April 2011
 Bank Intelligence Proven Performers - #4 in the Nation in
$1 - $10 billion category – June 2011
5

6. What Makes Us Different
One Bank, Eleven Charters Concept
 One Bank
 Consolidation of backroom operations (lower efficiency ratio)
 Agency agreements (customers may use any of our 53 locations)
 Eleven Community Bank Charters
 Bank Presidents run their banks
 Local Boards – Movers and Shakers of the Community
 Keep our banks locally focused
 Make sure we meet the needs of the community
 Help us make better loan decisions
 Help us market the bank
 Up to $2.75 million of FDIC insurance available
6

7. Huntsville Acquisition
 Acquired November 2010
 Huntsville, Texas
 37,000 Residents
 Sam Houston State University – 17,000 Students
 Fastest Growing University in Texas
 Headquarters of the Texas Department of Criminal Justice – 5,000 employees
 Strategically located on Interstate 45 – 70 miles north of Houston
 $179 million in Assets*
 $153 million in deposits
 $90 million in loans
 Approximately 1.63x book; 10.8x last twelve months earnings (tax effected)
 Huntsville acquisition is very similar to our model around Dallas/Fort Worth
and provides diversification
 #2 Market Share in Walker County – 21%
*As of March 31, 2012
7

8. FFIN’s Unique Positioning in Texas
Bank Key Markets
BBVA Compass Rio Grande, Gulf Coast, Houston, Dallas, El Paso, Lubbock
Comerica, Inc. DFW, Austin, Houston, California, Michigan, Florida, Mexico
Frost San Antonio, Austin, Corpus Christi, DFW, Rio Grande
International Bancshares Corp. Rio Grande, Houston, San Antonio, Oklahoma
Prosperity Houston, DFW, Austin
Southside East Texas
Texas Capital DFW, Austin, San Antonio and Houston
ViewPoint Financial Dallas
Zion DFW and Houston
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9. 89

10. Texas: Large and Growing
Five most populous states:* Growth
(2000 – 2010)
California 37.3 million 10.0%
Texas 25.2 million 20.6%
New York 19.4 million 2.1%
Florida 18.8 million 17.6%
Illinois 12.8 million 3.3%
* U.S. Census Bureau
10

11. Target Markets – Population Growth
Population growth (2000-2010) in FFIN expansion markets:*
Texas 20.6%
Bridgeport & Wise County 21.2%
Fort Worth / Tarrant County 25.1%
Cleburne, Midlothian & Johnson County 19.0%
Weatherford, Willow Park, Aledo 32.1%
Granbury & Hood County 24.5%
Stephenville & Erath County 14.8%
* U.S. Census Bureau
11

12. Texas Benefits
 CEO Magazine ranks Texas best state for
business – for seventh consecutive year
 Texas created more jobs (230,800) in 2010 more
than any other state
 Texas created more private sector jobs than any
other state during the past decade
12

13. Preferred Acquisition: Granbury and Glen Rose
13
12

14. Core Markets: West Central Texas
 Markets served benefiting from well-established,
long- time customers
ASSET DEPOSIT MARKET
BANK LOCATIONS
SIZE* MARKET SHARE** SHARE RANK**
First Financial Bank $1,443 M 14 41% 1
(Abilene, Clyde, Moran, Albany, Odessa)
First Financial Bank $166 M 1 42% 1
(Hereford)
First Financial Bank $206M 4 55% 1
(Eastland, Ranger, Rising Star, Cisco)
First Financial Bank $184 M 4 37% 1
(Sweetwater, Roby, Trent, Merkel)
First Financial Bank $431M 2 20% 2
(San Angelo)
* Data as of 03-31-12
TOTALS $2,430M 25 ** Data as of 06-30-11
14

15. Expansion Markets
DEPOSIT MARKET MARKET SHARE
BANK ASSET SIZE* LOCATIONS
SHARE** RANK**
First Financial Bank $315 M 6 21% 1
(Cleburne, Burleson, Alvarado, Midlothian, Crowley)
First Financial Bank $325 M 4 8% 5
(Southlake, Trophy Club, Keller, Grapevine
3 16% 3
Bridgeport, Decatur, Boyd)
First Financial Bank $378 M 6 21% 2
(Stephenville, Granbury, Glen Rose, Acton)
First Financial Bank $396 M 7 24% 1
(Weatherford, Aledo, Willow Park, Brock, Ft. Worth)
First Financial Bank $217 M 1 35% 1
(Mineral Wells)
First Financial Bank $179 M 1 21% 2
(Huntsville)
* Data as of 03-31-12
TOTALS $1,810M 28 ** Data as of 06-30-11
15

16. Recent De Novo Growth
 San Angelo: HEB Branch – Expected to Open 4th Qtr. 2012
 Abilene: Southside Branch – Expected to Open 4th Qtr. 2012
 Grapevine: Branch of Southlake – March 2012
 Cisco: Branch of Eastland – September 2011
 Lamesa: Office of Trust Company – April 2011
 Crowley: Branch of Cleburne – October 2010
 Odessa: Branch of Abilene – February 2010
 Fort Worth: Branch of Weatherford – February 2010
 Odessa: Office of Trust Company – April 2009
 Merkel: Branch of Sweetwater – July 2008
 Brock: Branch of Weatherford – March 2008
 Acton: Branch of Stephenville – March 2008
 Albany: Branch of Abilene – May 2007
 Fort Worth: Office of Trust Company – April 2007
16

17. Senior Management at First Financial
Years with Company Years in Industry
Scott Dueser
Chairman of the Board, President & 36 41
Chief Executive Officer
J. Bruce Hildebrand, CPA
Executive Vice President 9 33
Chief Financial Officer
Gary L. Webb
Executive Vice President 9 23
Operations
Gary S. Gragg
Executive Vice President 21 33
Credit Administration
Marna Yerigan
Executive Vice President 1 28
Credit Administration
Michele Stevens
Senior Vice President 15 31
Advertising and Marketing
Courtney Jordan
Senior Vice President 3 18
Training & Education
Kirk Thaxton, CTFA
President, First Financial Trust & Asset 25 29
Management
17

18. Experienced Bank CEOs & Presidents
Years with Company Years in Industry
Ron Butler, FFB Abilene 19 30
Mike Mauldin, FFB Hereford 9 34
Kirby Andrews, FFB Sweetwater 21 24
Trent Swearengin, FFB Eastland 13 13
Mike Boyd, FFB San Angelo 36 40
Tom O’Neil, FFB Cleburne 13 32
Matt Reynolds, FFB Cleburne 7 30
Ron Mullins, FFB Stephenville 6 33
Doyle Lee, FFB Weatherford 16 39
Jay Gibbs, FFB Weatherford 10 37
Mark Jones, FFB Southlake 11 34
Ken Williamson, FFB Mineral Wells 10 40
Robert Pate, FFB Huntsville 14 31
Gary Tucker, First Technology Services 21 37
18

19. Asset Performance
Growth in Total Assets (in millions)
*As of March 31, 2012
19

20. Deposit Growth
Growth in FFIN Total Deposits (in millions)
$3,335 $3,398*
$3,113
$2,546 $2,583 $2,685
*As of March 31, 2012
20

21. Deposit Products
*As of March 31, 2012
21

22. Account Growth
December 31, 2010 December 31, 2011 March 31, 2012
Total Number of Accounts 200,027 204,063 206,546
 Net Growth in 2011 – 4,036 Accounts
 New Growth in 2012 – 2,483 Accounts
22

23. Loan Performance
Growth in FFIN Total Loans (in millions)
$1,787 $1,799*
$1,690
$1,528 $1,566
$1,514
$1,373
*As of March 31, 2012
23

24. Overview of Loan Portfolio
*As of March 31, 2012
24

25. Breakdown of R/E Loan Portfolio
*As of March 31, 2012
25

26. Loan to Deposit Ratio
2006 2007 2008 2009 2010 2011 2012*
End of
Period 57.6 60.0 60.6 56.4 54.3 53.6 52.9
Average
56.6 59.8 61.1 59.5 56.0 54.6 53.9
Balances
*As of March 31, 2012
26

27. Variable and Fixed Rate Loans
Loan Portfolio Interest Rate Risk Analysis
Variable
Fixed Rate
Rate
Less than 1 to 3 3 to 5 5 to 10 10 to 15 Over 15
1 year years years years years years
35.2% 10.4% 14.9% 19.4% 8.4% 8.3% 3.4%
*As of March 31, 2012
27

28. Sound Lending Practices
Nonperforming assets as a percentage of loans + foreclosed assets (FFIN vs. Peers)
2007 2008 2009 2010 2011 2012*
First
Financial 0.31% 0.80% 1.46% 1.53% 1.64% 1.60%
Peer Group 0.98% 2.63% 5.41% 5.38% 4.66% -
*As of March 31, 2012
28

29. Allowance for Loan Losses and Provision for Loan Losses
(in thousands)
*As of March 31, 2012
29

30. Summary of Bond Portfolio
30

31. Municipal Allocation by State
State Percentage
Texas 60.07%
Michigan 4.65%
Wisconsin 4.10%
Illinois 2.67%
Washington 2.02%
Florida 1.95%
New Jersey 1.89%
Massachusetts 1.75%
Utah 1.68%
California 1.59%
Kentucky 1.54%
Louisiana 1.51%
Other 38 states 14.58%
31

32. Growth in Trust Assets
Total Trust Assets – Book Value (in millions)
*As of March 31, 2012
32

33. Total Trust Fees
Growth in FFTAM Fees (Full year and 1st 3 months) (in thousands)
33

34. 25th Consecutive Year of Increased Earnings
FFIN Earnings (Full year and 1st 3 months) (in millions)
thru
March 31st
34

35. Strong Shareholder Earnings
Basic Earnings Per Share (Full year and 1st 3 months)
$0.04
thru
March 31st
35

36. FFIN Outperforms Peers
Percentage Return on Average Assets
First Financial
Peer Group
36

37. Strong Return on Capital
Percentage Return on Average Equity
First Financial
Peer Group
37

38. Capital & Capital Ratios
(dollars in thousands)
2008 2009 2010 2011 2012
Shareholders’
Equity 368,782 415,702 441,688 508,537 517,005
As a Percent of Total
11.48 12.68 11.70 12.34 12.23
Assets
Tangible
304,779 352,550 369,164 436,415 444,927
Capital
Tier 1
9.68 10.69 10.28 10.33 10.31
Leverage Ratio
Tier 1 Risk
15.89 17.73 17.01 17.49 17.73
Based Capital Ratio
Risk Based
17.04 19.10 18.26 18.74 18.99
Capital Ratio
38

39. Net Interest Margin
Quarterly Interest Margin
39

40. Working Harder and Smarter
Efficiency Ratio (FFIN vs. Peers)
2006 2007 2008 2009 2010 2011 2012*
First
Financial 53.57% 52.83% 50.76% 50.11% 49.49% 48.37% 48.08%
Peer Group 61.29% 63.12% 68.12% 69.53% 67.32% 65.86% -
*As of March 31, 2012
40

41. Total Return on Investment
Assume you owned 1,000 shares of FFIN stock on January 1, 2011…
Stock cost in January 2011 $34,170
Dividend received ($0.95 x 1,000 shares) $ 950
Decrease in stock price during 2011 ($740)
($34.17 to $33.43 X 1,000 shares) $2210,720
2011 return on investment 0.61%
2010 return on investment -2.99%
2009 return on investment 0.69%
2008 return on investment 50.20%
2007 return on investment -7.05%
5 year compound average return 6.32%
41

42. Dividends Per Share
Annual Dividends Per Share
42

43. Strong Stock Performance
43

44. Challenges
 Regulatory reform from Washington
 Keep nonperforming assets to a minimum
 Maintain net interest margin
 Lower efficiency ratio
44

45. Opportunities
 Loan Growth
 Mortgage Lending
 Trust Services
 Treasury Management
 Potential Acquisitions
45

46. www.ffin.com