This document provides an overview of First Financial Bankshares' financial performance for the 2nd quarter of 2015. It discusses the bank's acquisition of Conroe Bank and 4Trust Mortgage, highlights its operations in growing markets in Texas, and provides statistics on its loan portfolio, deposit growth, and other financial metrics. The document contains forward-looking statements and identifies risk factors that could affect actual future results.

1. 0
2nd Quarter 2015
First Financial Bankshares, Inc.

2. Forward Looking Statement
The numbers, as of and for the six months ended June 30, 2015, 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. 2
Who We Are
$6.1 billion financial holding company
headquartered in Abilene, Texas
Group of 13 separate regions
(Following the close of Conroe acquisition on July 31, 2015)
125-year history
Growth markets include 50 mile radius of
the larger cities of Texas

4. 3

5. Recognitions
 2015 Proven Performers Award Winner – Bank Intelligence
Solutions
 KBW Honor Roll – One of twenty five banks named – April 2015
 Raymond James Community Bankers Cup #1 – December 2014
 Sandler O’Neil Bank & Thrift Small-Cap All Stars – September
2014
 American Banker - #11 – Based on three year average Return on
Equity – August 2014
 ABA Banking Journal - #8 – Top Performing mid-sized banks
($1B - $10B) – May 2014
4

6. 5
What Makes Us Different
One Bank, Thirteen Regions Concept
 One Bank
 Consolidation of backroom operations, technology, and
compliance (lower efficiency ratio)
 Thirteen Regions
 Regional Presidents run their regions
 Local Boards – Movers and Shakers of the Community
 Keep our regions locally focused
 Make sure we meet the needs of the community
 Help us make better loan decisions
 Help us market the region

7. 6
FFIN’s Unique Positioning in Texas
Bank Key Markets
Comerica DFW, Austin, Houston, California, Michigan, Florida, Mexico
Green Houston, Austin, Dallas (New Public Company – August 2014)
Frost San Antonio, Austin, Corpus Christi, DFW, Rio Grande, West Texas
Independent North and Central Texas
International Bancshares Rio Grande, Houston, San Antonio, Oklahoma
Legacy Texas Dallas
Prosperity Houston, DFW, Austin, West Texas, South Central Texas, and Oklahoma
Southside East Texas
Texas Capital DFW, Austin, San Antonio, and Houston
Triumph Dallas (New Public Company – November 2014)
Veritex Dallas (New Public Company – October 2014)

8. 7
First Bank, N.A. - Conroe Acquisition
 Consummated July 31, 2015
 Montgomery, Walker, & Harris Counties (On I-45 North of Houston)
 Exxon Mobil Headquarters in the Woodlands
 Montgomery County – Approximately 500,000 residents, 55% growth from 2000 to
2010, 24th fastest growing county in the United States
 #4 Market Share in Conroe – 10.6%
 8 Branches in Conroe, Magnolia, Tomball, Cut and Shoot, Montgomery, and
Huntsville; additional site on Grand Parkway in Spring, Texas to expand
 $372.2 million in Assets*
 $339.4 million in deposits
 $257.1 million in loans
 1.06% Return on Assets in 2014
 $61 million purchase price of our stock which represents 16x last twelve months
earnings
 Conroe acquisition is consistent with our acquisition model of high growth areas,
strong management and excellent earnings opportunity
 Provides diversification and fits well into our footprint
 Management and Board share same values to outstanding customer service
*As of June 30, 2015

9. 8
4Trust Mortgage Acquisition
 Consummated – May 31, 2015
 Originated $175 million in mortgage loans in 2014 – Compared to $225 million that
First Financial Bank originated in 2014
 15 year old Company with offices in Fort Worth, Dallas and North Richland Hills
 $1.9 million purchase price
 Troy Fore is now President of Mortgage Division of First Financial Bank; other
owners joining First Financial as EVP’s – Tammie Harding, Kami Graves, and Ryan
Craig
 Considered one of the top mortgage companies in Fort Worth
 Will be able to offer expanded mortgage products and services to their customers

10. 9

11. 10
Texas: Large and Growing
Five most populous states:* Growth
(2003 – 2013)
California 38.3 million 8.7%
Texas 26.5 million 20.1%
New York 19.7 million 2.5%
Florida 19.6 million 15.0%
Illinois 12.9 million 2.6%
* U.S. Census Bureau

12. 11
Target Markets – Population Growth
Population growth (2003-2013) in FFIN expansion markets:*
Texas 20.1%
Bridgeport & Wise County 13.2%
Fort Worth & Tarrant County 23.2%
Cleburne & Johnson County 12.0%
Weatherford, Willow Park, Aledo & Parker County 25.6%
Granbury & Hood County 18.2%
Stephenville & Erath County 17.9%
* U.S. Census Bureau

13. 12
Texas Benefits
 State unemployment rate at 4.1%, state’s lowest rate
since November 2008
 Only Texas and New York have restored all the jobs
lost when recession hit in 2007
 CEO Magazine ranks Texas best state for business –
for seventh consecutive year
 Texas created more jobs (310,000) during the prior
twelve months, more than any other state
 Texas created more private sector jobs than any other
state during the past decade

14. Core Markets: West Central Texas
 Markets served benefiting from well-established,
long- time customers
REGION
ASSET
SIZE*
LOCATIONS
DEPOSIT
MARKET SHARE**
MARKET
SHARE RANK**
First Financial Bank
(Abilene, Clyde, Moran, Albany, Odessa)
$2,079M 15 48% 1
First Financial Bank
(Hereford)
$176M 1 42% 1
First Financial Bank
(Eastland, Ranger, Rising Star, Cisco)
$248M 4 66% 1
First Financial Bank
(Sweetwater, Roby, Trent, Merkel)
$209M 4 36% 1
First Financial Bank
(San Angelo)
$680M 3 19% 2
TOTALS $3,392M 27 * Data as of 06-30-15
** Data as of 06-30-14
13

15. Expansion Markets
REGION ASSET SIZE* LOCATIONS
DEPOSIT MARKET
SHARE**
MARKET SHARE
RANK**
First Financial Bank
(Cleburne, Burleson, Alvarado)
(Midlothian, Waxahachie)
$398M 4
2
20%
4%
2
6
First Financial Bank
(Southlake, Trophy Club, Keller, Grapevine)
(Bridgeport, Decatur, Boyd)
$403M 4
3
5%
19%
5
3
First Financial Bank
(Stephenville, Granbury, Glen Rose, Acton)
$470M 6 22% 2
First Financial Bank
(Weatherford, Aledo, Willow Park, Brock, Ft. Worth)
$480M 7 23% 1
First Financial Bank
(Mineral Wells)
$257M 1 38% 1
First Financial Bank
(Huntsville, New Waverly)
$192M 2 19% 2
First Financial Bank
(Orange, Mauriceville, Vidor)
(Newton, Port Arthur, Beaumont)
$497M 3
3
41%
10%
1
5
TOTALS $2,697M 35
First Financial Bank (Acquired 7-31-15)
(Conroe, Magnolia, Tomball, Cut and Shoot, Montgomery, Huntsville,
The Woodlands) - Market Share for Conroe Only
$372M 8 11% 4
* Data as of 06-30-15
** Data as of 06-30-14
14

16. Recent De Novo Growth
 Lubbock: Office of Trust Company – September 2014
 New Waverly: Branch of Huntsville – August 2014
 Beaumont: Branch of Orange – August 2014
 Weatherford: I-20 Branch – June 2013 (New Building Opened January 2015)
 San Angelo: HEB Branch – March 2013
 Waxahachie: Branch of Cleburne – December 2012
 Abilene: Antilley Road Branch – September 2012
 Grapevine: Branch of Southlake – March 2012
 Cisco: Branch of Eastland – September 2011
 Lamesa: Office of Trust Company – April 2011
 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 (Building New Building – Planned Opening Dec. 2015)
15

17. Fort Worth – Forest Park Blvd. and Rosedale
16

18. Fort Worth – Forest Park Blvd. and Rosedale
17

19. Years with Company Years in Industry
Scott Dueser
Chairman of the Board, President &
Chief Executive Officer
39 43
Ron Butler
Executive Vice President
Chief Administrative Officer
22 33
Gary S. Gragg
Executive Vice President
Credit Administration
24 36
J. Bruce Hildebrand, CPA
Executive Vice President
Chief Financial Officer
12 36
Luke Longhofer
Executive Vice President & Loan Review Officer
Credit Administration
3 10
Stan Limerick
Executive Vice President
Chief Information Officer
- 35
Randy Roewe
Executive Vice President
Chief Risk Officer
- 25
Kirk Thaxton, CTFA
President, First Financial Trust & Asset
Management
28 31
Gary L. Webb
Executive Vice President
12 26
Marna Yerigan
Executive Vice President
Credit Administration
4 30
Executive Management at First Financial
18

20. Years with Company Years in Industry
Brandon Harris
Senior Vice President
Appraisal Services
2 15
Monica Houston
Senior Vice President
Training
20 20
Larry Kentz
Senior Vice President & Compliance Officer
Compliance
1 35
Michele Stevens
Senior Vice President
Advertising and Marketing
16 32
Senior Management at First Financial
19

21. Experienced Regional CEOs & Presidents
Years with Company Years in Industry
Marelyn Shedd, Abilene 23 31
Mike Mauldin, Hereford 12 37
Kirby Andrews, Sweetwater 24 27
Trent Swearengin, Eastland 15 17
Mike Boyd, San Angelo 39 42
Tom O’Neil, Cleburne 16 34
Ron Mullins, Stephenville 8 36
Jay Gibbs, Weatherford 13 40
Mark Jones, Southlake 14 37
Ken Williamson, Mineral Wells 13 43
Robert Pate, Huntsville 17 33
Fred Wren, Huntsville 2 35
Stephen Lee, Southeast Region 7 25
Sam Baker, Conroe 15 39
20

22. 21
$3,776
$4,121
$4,502
$5,522
$5,848
$6,115*
2010 2011 2012 2013 2014 2015
Growth in Total Assets
Asset Performance
(in millions)
*As of June 30, 2015

23. 22
$959 $1,102 $1,312 $1,362 $1,570 $1,575
$2,154
$2,233
$2,321
$2,773
$3,180 $3,153
2010 2011 2012 2013 2014 2015
Non Interest Bearing Interest Bearing
Deposit Growth
Growth in FFIN Total Deposits (in millions)
$4,728*
$3,113
$3,335
$3,633
$4,135
$4,750
*As of June 30, 2015

24. 23
Deposit Products
Time
12.7%
Demand
33.3%
Money
Market
42.1%
Savings
11.9%
*As of June 30, 2015

25. Account Growth
Net Growth in 2011 – 4,036 Accounts
Net Growth in 2012 – 1,219 Accounts
Net Growth in 2013 – 3,308 Accounts*
Net Growth in 2014 – 10,687 Accounts
Net Growth in 2015 – 4,975 Accounts
December 31,
2011
December 31,
2012
December
31, 2013*
December 31,
2014
June 30,
2015
Total Number
of Accounts
204,063 205,282 208,590 234,614 239,589
24
*(Excluding Orange Acquisition)

26. $81 $66 $68 $76 $106 $92
$191 $218 $273 $334 $361 $362
$429 $427
$510
$590
$640 $647
$990 $1,076
$1,238
$1,689
$1,831 $1,867
2010 2011 2012 2013 2014 2015
Real Estate
Commercial
Consumer
Agricultural
Loan Performance
Growth in FFIN Total Loans (in millions)
$1,691
$1,787
$2,089
$2,968
25
$2,689
$2,938
*As of June 30, 2015

27. 26
Overview of Loan Portfolio
Commercial
21.8%
Agriculture
3.1%
Consumer
12.2%
Real Estate
62.9%
Note: Oil & Gas Exposure 2.8%
*As of June 30, 2015

28. Residential
Development &
Construction
7.4%
1-4 Family
47.8%
Commercial
Development and
Construction
4.3%
Commercial R/E
26.5%
Other R/E
14.0%
27
Breakdown of R/E Loan Portfolio
*As of June 30, 2015

29. 28
2010 2011 2012 2013 2014 2015*
End of
Period 54.3 53.6 57.5 65.0 61.8 62.8
Average
Balances
56.0 54.6 56.4 64.3 64.1 61.7
Loan to Deposit Ratio
*As of June 30, 2015

30. 29
Less than
1 year
1 to 3
years
3 to 5
years
5 to 10
years
10 to 15
years
Over 15
years
39.9% 4.1% 4.5% 13.2% 17.6% 11.8% 8.9%
Variable and Fixed Rate Loans
Loan Portfolio Interest Rate Risk Analysis
Variable
Rate
Fixed Rate
*As of June 30, 2015

31. 2010 2011 2012 2013 2014 2015
First
Financial 1.53% 1.64% 1.22% 1.16% 0.74% 0.61%*
Peer Group 5.37% 4.59% 2.75% 1.97% 1.25% 1.12%**
Sound Lending Practices
Nonperforming assets as a percentage of loans + foreclosed assets (FFIN vs. Peers)
30
**As of March 31, 2015
*As of June 30, 2015

32. 31
$31,106
$34,315 $34,839 $33,900
$36,824
$38,999*
$8,962
$6,626
$3,484 $3,753 $4,465
$2,844*
2010 2011 2012 2013 2014 2015
ALLL Provision
Allowance for Loan Losses and Provision for Loan Losses
(in thousands)
*As of June 30, 2015

33. Summary of Bond Portfolio
Agencies
6.42%
Corporates
3.42%
Muni
49.57%
MBSs
17.40%
CMOs
22.77%
Treasuries
0.42%
32
*As of June 30, 2015

34. $2,297 $2,431
$2,852
$3,361
$3,759
$3,970
$1,783 $1,912
$2,233
$2,465
$2,774
$2,996
2010 2011 2012 2013 2014 2015
Growth in Trust Assets
Total Trust Assets
33
MarketValue
BookValue
*As of June 30, 2015

35. 34
$10,808
$12,671
$14,464
$16,317
$18,766
$5,198
$6,254
$7,124
$7,746
$9,125 $9,472
2010 2011 2012 2013 2014 2015
Total Trust Fees
Growth in FFTAM Fees (Full year and 1st 6 months) (in thousands)
thru
June 30th

36. 35
$3,254
$4,176
$5,183
$6,142
$7,109
$1,553
$2,078
$2,597
$2,900
$3,542 $3,631
2010 2011 2012 2013 2014 2015
Total Trust Net Income
Growth in FFTAM Net Income (Full year and 1st 6 months) (in thousands)
thru
June 30th

37. $59.7
$68.4
$74.2
$78.9
$89.6
$27.9
$32.8
$36.1 $38.1
$43.5
$49.3
2010 2011 2012 2013 2014 2015
28th Consecutive Year of Increased Earnings
FFIN Earnings (Full year and 1st 6 months) (in millions)
36
thru
June 30th

38. 37
$0.95
$1.09
$1.18
$1.24
$1.40
$0.45
$0.52
$0.58 $0.60
$0.68
$0.77
2010 2011 2012 2013 2014 2015
thru
June 30th
Strong Shareholder Earnings
Basic Earnings Per Share
*Per share amounts reflect the 2 for 1 stock split that was effective June 2, 2014.

39. 1.75% 1.78% 1.75%
1.64% 1.65%
0.24%
0.80%
0.98% 1.04%
0.94%
2010 2011 2012 2013 2014
FFIN Outperforms Peers
Percentage Return on Average Assets
PeerGroup
FirstFinancial
38

40. 13.74%
14.44%
13.85% 13.75% 14.00%
0.88%
7.27%
8.56%
8.89%
8.23%
2010 2011 2012 2013 2014
Strong Return on Capital
Percentage Return on Average Equity
PeerGroup
FirstFinancial
39

41. 40
2011 2012 2013 2014 2015
Shareholders’
Equity 508,537 556,963 587,647 681,537 701,193
As a Percent of Total
Assets
12.34 12.37 11.25 11.65 11.47
Tangible
Capital
436,415 484,990 490,163 584,178 602,154
Tier 1
Leverage Ratio
10.33 10.60 9.84 9.89 9.84
Tier 1 Risk
Based Capital Ratio
17.49 17.43 15.82 16.05 16.25
Risk Based
Capital Ratio
18.74 18.68 16.97 17.16 17.36
Capital & Capital Ratios
(dollars in thousands)
*As of June 30, 2015

42. 3.00%
3.25%
3.50%
3.75%
4.00%
4.25%
4.50%
4.75%
5.00%
1st
Qtr. '12
2nd
Qtr. '12
3rd
Qtr. '12
4th
Qtr. '12
1st
Qtr. '13
2nd
Qtr. '13
3rd
Qtr. '13
4th
Qtr. '13
1st
Qtr. '14
2nd
Qtr. '14
3rd
Qtr. '14
4th
Qtr. '14
1st
Qtr. '15
2nd
Qtr. '15
First Financial Peer Group
Net Interest Margin
Quarterly Interest Margin
41

43. 2010 2011 2012 2013 2014 2015
First
Financial 49.49% 48.37% 48.14% 50.20% 49.24% 46.73%*
Peer Group 67.33% 65.57% 65.77% 67.80% 66.76% 64.29%**
Working Harder and Smarter
Efficiency Ratio (FFIN vs. Peers)
42
**As of March 31, 2015
*As of June 30, 2015

44. Stock cost in January 2014 $33,060
Dividend declared ($0.55 x 1,000 shares) $ 550
Decrease in stock price during 2014
($33.06 to $29.88 X 1,000 shares)
-$3,180
2014 return on investment -7.96%
2013 return on investment 72.11%
2012 return on investment 19.65%
2011 return on investment 0.61%
2010 return on investment -2.99%
5 year compound average return 12.36%
Total Return on Investment
12.36%
Assume you owned 1,000 shares of FFIN stock on January 1, 2014…
43
*Adjusted for 2 for 1 stock split effective June 2, 2014.

45. Dividends Per Share
$0.46 $0.48
$0.50 $0.52
$0.55
2010 2011 2012 2013 2014
Annual Dividends Declared Per Share*
44
*Per share amounts reflect the 2 for 1 stock split that was effective June 2, 2014.

46. Strong Stock Performance
-100.00%
-50.00%
0.00%
50.00%
100.00%
150.00%
200.00%
FFIN S&P 500 NASDAQ Dow Jones
Jan . ‘07 Mar. ’15Dec . ‘09Dec ‘07 Dec ‘08 Dec. ‘10 Dec. ’11 Dec. ’12 Dec. ’13 Dec. ’14
45

47. Challenges
Regulatory reform from Washington
Stagnant national economy
Oil & gas price decline
Low interest rate environment
Maintaining net interest margin
46

48. Opportunities
 Loan Growth
 Mortgage Lending
 Trust Services
 Treasury Management
 Mobile Banking
 Lower Efficiency Ratio
 Potential Acquisitions
47

49. 48