EXHIBIT 99.1

SOUTHSIDE BANCSHARES, INC.

ANNOUNCES FINANCIAL RESULTS FOR THE

SECOND QUARTER ENDED JUNE 30, 2019

• Second quarter net income was $18.6 million and earnings per diluted common share were $0.55

• Linked quarter loans increased $155.0 million, or 4.7%, to $3.46 billion from $3.31 billion

• Linked quarter net interest margin (FTE) increased 10 basis points from 3.07% to 3.17%

• Second quarter annualized return on average shareholders’ equity of 9.68% and return on average tangible common equity of 14.12% ⁽¹⁾ 

• Second quarter annualized return on average assets of 1.20%

• Linked quarter nonperforming assets as a percent of total assets decreased from 0.61% to 0.46%

Tyler, Texas, (July 26, 2019) Southside Bancshares, Inc. (“Southside” or the “Company”) (NASDAQ:SBSI) today reported its financial results for the quarter ended June 30, 2019. Southside reported net income of $18.6 million for the three months ended June 30, 2019, a decrease of $1.6 million, or 7.9%, compared to $20.2 million for the same period in 2018. Earnings per diluted common share decreased$0.02, or 3.5%, to $0.55 for the three months ended June 30, 2019, from $0.57 for the same period in 2018. The annualized return on average shareholders’ equity for the three months ended June 30, 2019 was 9.68%, compared to 10.79% for the same period in 2018.  The annualized return on average assets was 1.20% for the three months ended June 30, 2019, compared to 1.30% for the same period in 2018.

“I am extremely pleased to report that Southside had an outstanding second quarter highlighted by a linked quarter increase in loans of $155 million, increases in net interest margin and spread of ten basis points, and a 24.6% decrease in linked quarter nonperforming assets as a percentage of assets to 0.46%”, stated Lee R. Gibson, President and Chief Executive Officer of Southside. “The strong loan growth resulted from a combination of closing and funding several loans that had been in our pipeline for some time and a slowdown in large prepayments.”

“The ten basis point increase in the net interest margin and spread on a linked quarter basis was due to an increase in average loans as a percent of earning assets and in part to a nonrecurring loss on a fair value hedge interest rate swap of $507,000 recorded in net interest income during the first quarter. We expect loan revenue during the third quarter will benefit from the full impact of the loan growth that we experienced during the second quarter. During the second quarter, we recorded approximately $2.5 million in provision expense, of which approximately $1.3 million was directly related to the second quarter loan growth. Economic conditions in our East Texas markets continue to be good while economic conditions in our DFW and Austin markets remain strong.”

“I’m also pleased to share that we are preparing to expand our footprint. On July 23, 2019, we filed for regulatory approval to open a retail in-store branch in Kingwood, Texas, located in Montgomery County. Kingwood is a community located northeast of Houston, approximately 15 miles south of our Splendora branch. We anticipate opening this new location in November 2019 pending regulatory approval.”

Operating Results for the Three Months Ended June 30, 2019

Net income was $18.6 million for the three months ended June 30, 2019 compared with $20.2 million for the same period in 2018, a decrease of $1.6 million, or 7.9%. Net income per diluted common share was $0.55 for the three months ended June 30, 2019 compared with $0.57 for the same period in 2018, a decrease of 3.5%. The decrease in net income was largely driven by the increase in provision for loan losses, noninterest expense and income tax expense, partially offset by an increase in noninterest income. Annualized returns on average assets and average shareholders’ equity for the three months ended June 30, 2019 were 1.20% and 9.68%, respectively.  Our efficiency ratio (FTE) was 51.44% ⁽¹⁾ for the three months ended June 30, 2019, an improvement from 53.66% for the three months ended March 31, 2019.

Net interest income before provision for loan losses for the three months ended June 30, 2019 and 2018 was $43.1 million. Linked quarter, net interest income before provision for loan losses increased $2.0 million, or 4.9%, to $43.1 million, compared with $41.1 million during the three months ended March 31, 2019. The increase in net interest income for the linked quarter was due to the

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increase in interest income on our interest earning assets, primarily a result of the mix in our earning assets during the second quarter ended June 30, 2019.

Our tax equivalent net interest margin was 3.17% for the three months ended June 30, 2019 compared with 3.19% for the same period in 2018. The decrease was primarily due to the higher rates paid on interest bearing liabilities. Our tax equivalent net interest margin increased 10 basis points when compared to 3.07% for the three months ended March 31, 2019. This increase was due to an increase in average loans as a percent of earning assets and in part to a nonrecurring loss on a fair value hedge interest rate swap of $507,000 recorded in net interest income during the first quarter.

Noninterest income was $11.3 million for the three months ended June 30, 2019, an increase compared with $11.0 million for the same period in 2018. The increase was primarily due to a net gain on sale of securities, an increase in deposit services income and other noninterest income, partially offset by decreases in bank owned life insurance income and trust fees. On a linked quarter basis, noninterest income increased$1.7 million, or 18.0%, primarily due to an increase in deposit services income, an increase in net gain on sale of securities, an increase in swap fee income and a nonrecurring partial loss on fair value hedge interest rate swaps during the first quarter of 2019.

Noninterest expense was $29.7 million for the three months ended June 30, 2019 compared with $29.3 million for the same period in 2018, an increase of $0.4 million, or 1.5%. The increase was primarily due to an increase in salaries and employee benefits and other noninterest expense, partially offset by the decrease in acquisition expense. On a linked quarter basis, noninterest expense increased$0.1 million, or 0.2%, compared with the three months ended March 31, 2019.

Income tax expense increased $0.2 million for the three months ended June 30, 2019 compared to the same period in 2018. On a linked quarter basis, income tax expense increased $0.4 million. Our effective tax rate (“ETR”) increased to 16.1% for the three months ended June 30, 2019 compared to 14.3% for the three months ended March 31, 2019 and June 30, 2018. The higher ETR for the period was primarily due to a decrease in tax-exempt income as a percentage of pre-tax income.

Operating Results for the Six Months Ended June 30, 2019

Net income was $37.4 million for the six months ended June 30, 2019 compared with $36.5 million for the same period in 2018, an increase of $1.0 million, or 2.7%. Net income per diluted common share was $1.11 for the six months ended June 30, 2019 compared with $1.04 for the same period in 2018, an increase of 6.7%. The increase in net income was largely driven by the increase in interest income, as well as the decrease in provision for loan losses and noninterest expense, partially offset by an increase in interest expense and income tax expense. Annualized returns on average assets and average shareholders’ equity for the six months ended June 30, 2019 were 1.20% and 10.00%, respectively.  Our efficiency ratio (FTE) was 52.53% ⁽¹⁾ for the six months ended June 30, 2019.

Net interest income before provision for loan losses for the six months ended June 30, 2019 was $84.3 million compared with $87.2 million during the same period in 2018, a decrease of $3.0 million, or 3.4%. The decrease in net interest income was due to higher funding costs of our interest bearing liabilities partially offset by the increase in interest income on our interest earning assets, a result of higher rates and a shift in the mix of earning assets.

Our tax equivalent net interest margin was 3.12% for the six months ended June 30, 2019 compared with 3.19% for the same period in 2018. The decrease was primarily due to the higher rates paid on interest bearing liabilities.

Noninterest income was $20.8 million for the six months ended June 30, 2019, a slight increase compared with $20.6 million for the same period in 2018. The increase was primarily due to a net gain on sale of securities and an increase in deposit services income, partially offset by decreases in bank owned life insurance, trust fees and other noninterest income.

Noninterest expense was $59.3 million for the six months ended June 30, 2019 compared with $60.9 million for the same period in 2018, a decrease of $1.6 million, or 2.6%. The decrease was primarily due to a decrease in acquisition expense, net occupancy expense and amortization of intangibles, partially offset by increases in salaries and employee benefits, professional fees and software and data processing expense.

Income tax expense increased $1.3 million for the six months ended June 30, 2019 compared to the same period in 2018. Our ETR was approximately 15.2% and 13.0% for the six months ended June 30, 2019 and 2018, respectively.

Balance Sheet Data

At June 30, 2019, we had $6.37 billion in total assets compared with $6.12 billion at December 31, 2018 and $6.22 billion at March 31, 2019.

Loans at June 30, 2019 were $3.46 billion, an increase of $147.3 million, or 4.4%, compared with $3.31 billion at December 31, 2018. Linked quarter loans increased$155.0 million, or 4.7%, from $3.31 billion at March 31, 2019. The linked quarter net increase in our loans consisted of increases of $146.9 million of commercial real estate loans, $21.5 million of commercial loans,

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$14.0 million of municipal loans and $0.6 million of loans to individuals, partially offset by decreases of $23.8 million of construction loans and $4.1 million of 1-4 family residential loans.

Securities at June 30, 2019 were $2.24 billion, an increase of $83.5 million, or 3.9%, compared with $2.15 billion at December 31, 2018. Linked quarter securities increased $212.2 million, or 10.5%, from $2.02 billion at March 31, 2019.

Deposits at June 30, 2019 were $4.48 billion, an increase of $54.2 million, or 1.2%, compared with $4.43 billion at December 31, 2018. Linked quarter deposits decreased $88.6 million, or 1.9%, from $4.57 billion at March 31, 2019 primarily due to a decrease in brokered and public fund deposits.

Asset Quality

Nonperforming assets at June 30, 2019 were $29.4 million, or 0.46% of total assets, a decrease of $13.5 million, or 31.6%, compared to $42.9 million, or 0.70% of total assets, at December 31, 2018, and $38.1 million, or 0.61% of total assets, at March 31, 2019. During the three months ended June 30, 2019, our nonaccrual loans decreased $1.3 million and our accruing loans past due more than 90 days decreased $7.9 million due to one commercial real estate loan relationship that paid in full.

The allowance for loan losses at June 30, 2019 was $24.7 million, or 0.71% of total loans, compared to $27.0 million, or 0.82% of total loans at December 31, 2018, and $24.2 million, or 0.73% of total loans at March 31, 2019. The increase in the allowance for the linked quarter was primarily the result of growth in the loan portfolio.

For the three months ended June 30, 2019, we recorded provision for loan losses of $2.5 million compared with a $1.3 million provision expense for the three months ended June 30, 2018 and a partial reversal of provision of $0.9 million for the three months ended March 31, 2019. The provision for loan losses for the six months ended June 30, 2019 was $1.6 million compared with $5.0 million for the six months ended June 30, 2018.

Net charge-offs were $2.0 million for the three months ended June 30, 2019 compared with $0.4 million for the three months ended June 30, 2018 and $1.9 million for the three months ended March 31, 2019. Net charge-offs for the second quarter of 2019 were primarily related to a previously reserved write-down on a large nonaccrual commercial real estate loan. Net charge-offs were $3.9 million for the six months ended June 30, 2019 compared with $0.7 million for the six months ended June 30, 2018.

Dividend

Southside Bancshares, Inc. declared a second quarter cash dividend of $0.31 per share on May 9, 2019, which was paid on June 6, 2019, to all shareholders of record as of May 23, 2019.

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(1) Refer to the “Non-GAAP Reconciliation” at the end of the financial statement tables in this Earnings Release for a reconciliation of this non-GAAP financial measure to the nearest GAAP financial measure.

Conference Call

Southside's management team will host a conference call to discuss its second quarter ended June 30, 2019 financial results on Friday, July 26, 2019 at 9:00 a.m. CDT.  The call can be accessed by dialing 844-775-2540 and by identifying the conference ID number 9381487 or by identifying “Southside Bancshares, Inc., Second Quarter 2019 Earnings Call.”  To listen to the call via webcast, register at http://investors.southside.com.

For those unable to listen to the conference call live, a recording will be available from approximately 12:00 p.m. CDT July 26, 2019 through August 7, 2019 by accessing the company website, http://investors.southside.com.

Non-GAAP Financial Measures

Our accounting and reporting policies conform to generally accepted accounting principles (“GAAP”) in the United States and prevailing practices in the banking industry. However, certain non-GAAP measures are used by management to supplement the evaluation of our performance. These include the following fully taxable-equivalent measures (“FTE”): (i) Net interest income (FTE), (ii) Net interest margin (FTE), (iii) Net interest spread (FTE), and (iv) Efficiency ratio (FTE), which include the effects of taxable-equivalent adjustments using a federal income tax rate of 21% for the six months ended June 30, 2019 and 2018 to increase tax-exempt interest income to a tax-equivalent basis. Interest income earned on certain assets is completely or partially exempt from federal income tax. As such, these tax-exempt instruments typically yield lower returns than taxable investments.

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Net interest income (FTE), Net interest margin (FTE) and Net interest spread (FTE). Net interest income (FTE) is a non-GAAP measure that adjusts for the tax-favored status of net interest income from certain loans and investments. We believe this measure to be the preferred industry measurement of net interest income and it enhances comparability of net interest income arising from taxable and tax-exempt sources. The most directly comparable financial measure calculated in accordance with GAAP is our net interest income. Net interest margin (FTE) is the ratio of net interest income (FTE) to average earning assets. The most directly comparable financial measure calculated in accordance with GAAP is our net interest margin. Net interest spread (FTE) is the difference in the average yield on average earning assets on a tax-equivalent basis and the average rate paid on average interest bearing liabilities. The most directly comparable financial measure calculated in accordance with GAAP is our net interest spread.

Efficiency ratio (FTE).  The efficiency ratio (FTE) is a non-GAAP measure that provides a measure of productivity in the banking industry. This ratio is calculated to measure the cost of generating one dollar of revenue. The ratio is designed to reflect the percentage of one dollar which must be expended to generate that dollar of revenue. We calculate this ratio by dividing noninterest expense, excluding amortization expense on intangibles and certain nonrecurring expense by the sum of net interest income (FTE) and noninterest income, excluding net gain (loss) on sale of securities available for sale and certain nonrecurring impairments. The most directly comparable financial measure calculated in accordance with GAAP is our efficiency ratio.

These non-GAAP financial measures should not be considered alternatives to GAAP-basis financial statements and other bank holding companies may define or calculate these non-GAAP measures or similar measures differently. Whenever we present a non-GAAP financial measure in an SEC filing, we are also required to present the most directly comparable financial measure calculated and presented in accordance with GAAP and reconcile the differences between the non-GAAP financial measure and such comparable GAAP measure.

Management believes adjusting net interest income, net interest margin and net interest spread to a fully taxable-equivalent basis is a standard practice in the banking industry as these measures provide useful information to make peer comparisons. Tax-equivalent adjustments are reflected in the respective earning asset categories as listed in the “Average Balances with Average Yields and Rates” tables.

A reconciliation of our non-GAAP financial measures to the comparable GAAP financial measures is included at the end of the financial statement tables.

About Southside Bancshares, Inc.

Southside Bancshares, Inc. is a bank holding company with approximately $6.37 billion in assets as of June 30, 2019, that owns 100% of Southside Bank.  Southside Bank currently has 59 branches in Texas and operates a network of 81 ATMs/ITMs.

To learn more about Southside Bancshares, Inc., please visit our investor relations website at www.southside.com/about/investor-relations.  Our investor relations site provides a detailed overview of our activities, financial information and historical stock price data.  To receive e-mail notification of company news, events and stock activity, please register on the E-mail Notification portion of the website.  Questions or comments may be directed to Lindsey Bibby at (903) 630-7965, or lindsey.bibby@southside.com.

Forward-Looking Statements

Certain statements of other than historical fact that are contained in this press release and in other written material, documents and oral statements issued by or on behalf of the Company may be considered to be “forward-looking statements” within the meaning of and subject to the safe harbor protections of the Private Securities Litigation Reform Act of 1995.  These forward-looking statements are not guarantees of future performance, nor should they be relied upon as representing management’s views as of any subsequent date.  These statements may include words such as “expect,” “estimate,” “project,” “anticipate,” “appear,” “believe,” “could,” “should,” “may,” “likely,” “intend,” “probability,” “risk,” “target,” “objective,” “plans,” “potential,” and similar expressions.  Forward-looking statements are statements with respect to the Company’s beliefs, plans, expectations, objectives, goals, anticipations, assumptions and estimates about the Company's future performance and are subject to significant known and unknown risks and uncertainties, which could cause the Company's actual results to differ materially from the results discussed in the forward-looking statements.  For example, discussions about trends in asset quality, capital, liquidity, the pace of loan and revenue growth, the Company's ability to sell nonperforming assets, expense reductions, planned operational efficiencies, earnings, successful integration of completed acquisitions and certain market risk disclosures, including the impact of interest rates, tax reform and other economic factors, are based upon information presently available to management and are dependent on choices about key model characteristics and assumptions and are subject to various limitations.  By their nature, certain of the market risk disclosures are only estimates and could be materially different from what actually occurs in the future.  

Additional information concerning the Company and its business, including additional factors that could materially affect the Company’s financial results, is included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018, under “Part I - Item 1. Forward Looking Information” and "Part I - Item 1A. Risk Factors" and in the Company’s other filings with the Securities and Exchange Commission.  The Company disclaims any obligation to update any factors or to announce publicly the result of revisions to any of the forward-looking statements included herein to reflect future events or developments.

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Southside Bancshares, Inc.

Consolidated Financial Summary (Unaudited)

(Dollars in thousands)

	As of
	2019						2018
	June 30,			Mar. 31,			Dec. 31,			Sept. 30,			June 30,
ASSETS
Cash and due from banks	$	77,319		$	81,981		$	87,375		$	85,103		$	78,534
Interest earning deposits	54,642			184,612			23,884			70,685			138,685
Federal funds sold	560			3,350			9,460			18,284			14,850
Securities available for sale, at estimated fair value	2,088,787			1,876,255			1,989,436			1,939,277			2,037,994
Securities held to maturity, at carrying value	147,091			147,431			162,931			163,365			164,276
Total securities	2,235,878			2,023,686			2,152,367			2,102,642			2,202,270
Federal Home Loan Bank stock, at cost	44,718			35,269			32,583			32,291			42,994
Loans held for sale	1,812			384			601			954			4,566
Loans	3,460,143			3,305,110			3,312,799			3,274,524			3,270,883
Less: Allowance for loan losses	(24,705		)	(24,155		)	(27,019		)	(26,092		)	(25,072		)
Net loans	3,435,438			3,280,955			3,285,780			3,248,432			3,245,811
Premises & equipment, net	140,105			138,290			135,972			133,939			132,578
Goodwill	201,116			201,116			201,116			201,116			201,246
Other intangible assets, net	15,471			16,600			17,779			19,009			20,287
Bank owned life insurance	99,294			98,704			98,160			97,611			97,059
Other assets	66,517			152,249			78,417			95,288			71,293
Total assets	$	6,372,870		$	6,217,196		$	6,123,494		$	6,105,354		$	6,250,173
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest bearing deposits	$	1,028,861		$	1,038,116		$	994,680		$	1,033,572		$	1,038,907
Interest bearing deposits	3,450,395			3,529,777			3,430,350			3,519,940			3,469,834
Total deposits	4,479,256			4,567,893			4,425,030			4,553,512			4,508,741
Other borrowings and Federal Home Loan Bank borrowings	849,821			628,498			755,875			570,242			784,754
Subordinated notes, net of unamortized debt issuance costs	98,490			98,448			98,407			98,366			98,326
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,248			60,247			60,246			60,244			60,243
Other liabilities	97,290			104,077			52,645			70,484			46,299
Total liabilities	5,585,105			5,459,163			5,392,203			5,352,848			5,498,363
Shareholders' equity	787,765			758,033			731,291			752,506			751,810
Total liabilities and shareholders' equity	$	6,372,870		$	6,217,196		$	6,123,494		$	6,105,354		$	6,250,173

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Southside Bancshares, Inc.

Consolidated Financial Summary (Unaudited)

(Dollars in thousands)

	Three Months Ended
	2019						2018
	June 30,			Mar. 31,			Dec. 31,			Sept. 30,			June 30,
Income Statement:
Total interest income	$	60,672		$	59,027		$	58,022		$	57,152		$	56,797
Total interest expense	17,541			17,902			15,612			14,742			13,686
Net interest income	43,131			41,125			42,410			42,410			43,111
Provision for loan losses	2,506			(918		)	2,446			975			1,281
Net interest income after provision for loan losses	40,625			42,043			39,964			41,435			41,830
Noninterest income
Deposit services	6,652			5,986			6,325			6,317			6,261
Net gain (loss) on sale of securities available for sale	416			256			61			(741		)	(332		)
Gain on sale of loans	181			93			101			303			173
Trust fees	1,520			1,541			1,573			1,568			1,931
Bank owned life insurance	559			544			554			552			1,185
Brokerage services	477			517			499			532			506
Other	1,449			601			1,021			1,491			1,283
Total noninterest income	11,254			9,538			10,134			10,022			11,007
Noninterest expense
Salaries and employee benefits	17,891			18,046			17,823			17,628			16,633
Net occupancy	3,289			3,175			3,475			3,396			3,360
Acquisition expense	—			—			118			437			1,026
Advertising, travel & entertainment	733			847			786			648			775
ATM expense	246			180			250			251			243
Professional fees	1,069			1,314			1,189			824			952
Software and data processing	1,086			1,076			1,057			977			939
Communications	489			487			477			354			478
FDIC insurance	437			422			455			435			484
Amortization of intangibles	1,129			1,179			1,228			1,279			1,328
Other	3,331			2,901			3,338			2,733			3,056
Total noninterest expense	29,700			29,627			30,196			28,962			29,274
Income before income tax expense	22,179			21,954			19,902			22,495			23,563
Income tax expense	3,569			3,137			2,521			2,192			3,360
Net income	$	18,610		$	18,817		$	17,381		$	20,303		$	20,203
Common share data:
Weighted-average basic shares outstanding	33,726			33,697			34,611			35,114			35,062
Weighted-average diluted shares outstanding	33,876			33,846			34,748			35,288			35,233
Common shares outstanding end of period	33,749			33,718			33,725			35,160			35,084
Net income per common share
Basic	$	0.55		$	0.56		$	0.50		$	0.58		$	0.58
Diluted	0.55			0.56			0.50			0.58			0.57
Book value per common share	23.34			22.48			21.68			21.40			21.43
Tangible book value per common share (1)	16.92			16.02			15.19			15.14			15.11
Cash dividends paid per common share	0.31			0.30			0.32			0.30			0.30
Selected Performance Ratios:
Return on average assets	1.20		%	1.21		%	1.14		%	1.30		%	1.30		%
Return on average shareholders’ equity	9.68			10.35			9.30			10.61			10.79
Return on average tangible common equity (1)	14.12			15.44			13.95			15.70			16.13
Average yield on earning assets (FTE) (1)	4.42			4.33			4.32			4.18			4.15
Average rate on interest bearing liabilities	1.61			1.62			1.46			1.36			1.25
Net interest spread (FTE) (1)	2.81			2.71			2.86			2.82			2.90
Net interest margin (FTE) (1)	3.17			3.07			3.21			3.14			3.19
Average earning assets to average interest bearing liabilities	128.99			127.70			131.07			131.12			130.22
Noninterest expense to average total assets	1.91			1.91			1.98			1.86			1.89
Efficiency ratio (FTE) (1)	51.44			53.66			52.18			48.91			47.56

(1) Refer to the “Non-GAAP Reconciliation” at the end of the financial statement tables in this Earnings Release for a reconciliation of this non-GAAP financial measure to the nearest GAAP financial measure.

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Southside Bancshares, Inc.

Consolidated Financial Summary (Unaudited)

(Dollars in thousands)

	Three Months Ended
	2019						2018
	June 30,			Mar. 31,			Dec. 31,			Sept. 30,			June 30,
Nonperforming assets:	$	29,363		$	38,111		$	42,906		$	39,638		$	42,423
Nonaccrual loans (1)	16,376			17,691			35,770			32,526			35,351
Accruing loans past due more than 90 days (1)	—			7,927			—			—			7
Restructured loans (2)	11,918			11,490			5,930			5,699			5,860
Other real estate owned	1,069			978			1,206			1,413			1,137
Repossessed assets	—			25			—			—			68
Asset Quality Ratios:
Nonaccruing loans to total loans	0.47		%	0.54		%	1.08		%	0.99		%	1.08		%
Allowance for loan losses to nonaccruing loans	150.86			136.54			75.54			80.22			70.92
Allowance for loan losses to nonperforming assets	84.14			63.38			62.97			65.83			59.10
Allowance for loan losses to total loans	0.71			0.73			0.82			0.80			0.77
Nonperforming assets to total assets	0.46			0.61			0.70			0.65			0.68
Net charge-offs (recoveries) to average loans	0.23			0.24			0.18			(0.01		)	0.05
Capital Ratios:
Shareholders’ equity to total assets	12.36			12.19			11.94			12.33			12.03
Common equity tier 1 capital	14.02			14.38			14.77			15.90			15.49
Tier 1 risk-based capital	15.46			15.88			16.29			17.43			17.02
Total risk-based capital	18.52			19.06			19.59			20.75			20.31
Tier 1 leverage capital	10.48			10.18			10.64			11.06			10.76
Period end tangible equity to period end tangible assets (3)	9.28			9.01			8.68			9.05			8.80
Average shareholders’ equity to average total assets	12.36			11.70			12.23			12.28			12.06

(1) Excludes purchased credit impaired ("PCI") loans measured at fair value at acquisition if the timing and amount of cash flows expected to be collected from those sales can be reasonably estimated.

(2) Includes $0.8 million, $0.7 million, $3.1 million, $3.2 million and $2.9 million in PCI loans restructured as of June 30, 2019, March 31, 2019, December 31, 2018, September 30, 2018, and June 30, 2018, respectively.

(3) Refer to the “Non-GAAP Reconciliation” at the end of the financial statement tables in this Earnings Release for a reconciliation of this non-GAAP financial measure to the nearest GAAP financial measure.

Loan Portfolio Composition

The following table sets forth loan totals by category for the periods presented (in thousands):

	Three Months Ended
	2019				2018
	June 30,		Mar. 31,		Dec. 31,		Sept. 30,		June 30,
Real Estate Loans:
Construction	$	579,565	$	603,411	$	507,732	$	484,254	$	487,286
1-4 Family Residential	782,073		786,198		794,499		791,274		791,359
Commercial	1,251,248		1,104,378		1,194,118		1,218,714		1,245,936
Commercial Loans	389,521		367,995		356,649		322,873		282,723
Municipal Loans	357,028		343,026		353,370		344,792		345,595
Loans to Individuals	100,708		100,102		106,431		112,617		117,984
Total Loans	$	3,460,143	$	3,305,110	$	3,312,799	$	3,274,524	$	3,270,883

Page-7

Southside Bancshares, Inc.

Consolidated Financial Summary (Unaudited)

(Dollars in thousands)

	Six Months Ended
	2019			2018
	June 30,			June 30,
Income Statement:
Total interest income	$	119,699		$	113,991
Total interest expense	35,443			26,747
Net interest income	84,256			87,244
Provision for loan losses	1,588			5,016
Net interest income after provision for loan losses	82,668			82,228
Noninterest income
Deposit services	12,638			12,440
Net gain (loss) on sale of securities available for sale	672			(1,159		)
Gain on sale of loans	274			288
Trust fees	3,061			3,691
Bank owned life insurance	1,103			1,817
Brokerage services	994			956
Other	2,050			2,584
Total noninterest income	20,792			20,617
Noninterest expense
Salaries and employee benefits	35,937			35,192
Net occupancy	6,464			6,943
Acquisition expense	—			1,858
Advertising, travel & entertainment	1,580			1,460
ATM expense	426			589
Professional fees	2,383			2,022
Software and data processing	2,162			1,962
Communications	976			1,016
FDIC insurance	859			981
Amortization of intangibles	2,308			2,706
Other	6,232			6,212
Total noninterest expense	59,327			60,941
Income before income tax expense	44,133			41,904
Income tax expense	6,706			5,450
Net income	$	37,427		$	36,454
Common share data:
Weighted-average basic shares outstanding	33,711			35,042
Weighted-average diluted shares outstanding	33,862			35,217
Common shares outstanding end of period	33,749			35,084
Net income per common share
Basic	$	1.11		$	1.04
Diluted	1.11			1.04
Book value per common share	23.34			21.43
Tangible book value per common share (1)	16.92			15.11
Cash dividends paid per common share	0.61			0.58
Selected Performance Ratios:
Return on average assets	1.20		%	1.16		%
Return on average shareholders’ equity	10.00			9.77
Return on average tangible common equity (1)	14.75			14.71
Average yield on earning assets (FTE) (1)	4.37			4.12
Average rate on interest bearing liabilities	1.61			1.20
Net interest spread (FTE) (1)	2.76			2.92
Net interest margin (FTE) (1)	3.12			3.19
Average earning assets to average interest bearing liabilities	128.34			128.72
Noninterest expense to average total assets	1.91			1.94
Efficiency ratio (FTE) (1)	52.53			49.43

(1) Refer to the “Non-GAAP Reconciliation” at the end of the financial statement tables in this Earnings Release for a reconciliation of this non-GAAP financial measure to the nearest GAAP financial measure.

Page-8

Southside Bancshares, Inc.

Consolidated Financial Summary (Unaudited)

(Dollars in thousands)

	Six Months Ended
	2019			2018
	June 30,			June 30,
Nonperforming assets:	$	29,363		$	42,423
Nonaccrual loans (1)	16,376			35,351
Accruing loans past due more than 90 days (1)	—			7
Restructured loans (2)	11,918			5,860
Other real estate owned	1,069			1,137
Repossessed assets	—			68
Asset Quality Ratios:
Nonaccruing loans to total loans	0.47		%	1.08		%
Allowance for loan losses to nonaccruing loans	150.86			70.92
Allowance for loan losses to nonperforming assets	84.14			59.10
Allowance for loan losses to total loans	0.71			0.77
Nonperforming assets to total assets	0.46			0.68
Net charge-offs (recoveries) to average loans	0.24			0.04
Capital Ratios:
Shareholders’ equity to total assets	12.36			12.03
Common equity tier 1 capital	14.02			15.49
Tier 1 risk-based capital	15.46			17.02
Total risk-based capital	18.52			20.31
Tier 1 leverage capital	10.48			10.76
Period end tangible equity to period end tangible assets (3)	9.28			8.80
Average shareholders’ equity to average total assets	12.03			11.88

(1) Excludes PCI loans measured at fair value at acquisition if the timing and amount of cash flows expected to be collected from those sales can be reasonably estimated.

(2) Includes $0.8 million and $2.9 million in PCI loans restructured as of June 30, 2019 and June 30, 2018, respectively.

(3) Refer to the “Non-GAAP Reconciliation” at the end of the financial statement tables in this Earnings Release for a reconciliation of this non-GAAP financial measure to the nearest GAAP financial measure.

Page-9

Southside Bancshares, Inc.

Average Balances and Average Yields and Rates (Annualized) (Unaudited)

(Dollars in thousands)

The tables that follow show average earning assets and interest bearing liabilities together with the average yield on the earning assets and the average rate of the interest bearing liabilities for the periods presented. The interest and related yields presented are on a fully taxable-equivalent basis and are therefore non-GAAP measures. See “Non-GAAP Financial Measures” and “Non-GAAP Reconciliation” for more information.

	Three Months Ended
	June 30, 2019							March 31, 2019
	Avg Balance			Interest		Avg Yield/Rate		Avg Balance			Interest		Avg Yield/Rate
ASSETS
Loans (1)	$	3,387,323		$	43,559	5.16	%	$	3,296,665		$	42,210	5.19	%
Loans held for sale	1,965			21		4.29	%	611			7		4.65	%
Securities:
Taxable investment securities (2)	3,000			27		3.61	%	3,000			28		3.79	%
Tax-exempt investment securities (2)	459,996			4,513		3.94	%	659,187			5,732		3.53	%
Mortgage-backed and related securities (2)	1,680,109			13,246		3.16	%	1,647,564			12,474		3.07	%
Total securities	2,143,105			17,786		3.33	%	2,309,751			18,234		3.20	%
Federal Home Loan Bank stock, at cost, and equity investments	52,311			440		3.37	%	53,764			355		2.68	%
Interest earning deposits	66,017			411		2.50	%	64,690			386		2.42	%
Federal funds sold	3,365			39		4.65	%	7,635			47		2.50	%
Total earning assets	5,654,086			62,256		4.42	%	5,733,116			61,239		4.33	%
Cash and due from banks	78,757							83,147
Accrued interest and other assets	534,835							513,738
Less:  Allowance for loan losses	(24,838		)					(27,060		)
Total assets	$	6,242,840						$	6,302,941
LIABILITIES AND SHAREHOLDERS’ EQUITY
Savings accounts	$	365,205		262		0.29	%	$	360,664		258		0.29	%
Certificates of deposits	1,119,464			5,861		2.10	%	1,154,203			5,697		2.00	%
Interest bearing demand accounts	1,969,593			5,334		1.09	%	1,982,891			5,286		1.08	%
Total interest bearing deposits	3,454,262			11,457		1.33	%	3,497,758			11,241		1.30	%
Federal Home Loan Bank borrowings	755,748			3,899		2.07	%	816,389			4,457		2.21	%
Subordinated notes, net of unamortized debt issuance costs	98,469			1,410		5.74	%	98,428			1,400		5.77	%
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,247			718		4.78	%	60,246			729		4.91	%
Other borrowings	14,530			57		1.57	%	16,788			75		1.81	%
Total interest bearing liabilities	4,383,256			17,541		1.61	%	4,489,609			17,902		1.62	%
Noninterest bearing deposits	1,014,746							986,343
Accrued expenses and other liabilities	73,494							89,768
Total liabilities	5,471,496							5,565,720
Shareholders’ equity	771,344							737,221
Total liabilities and shareholders’ equity	$	6,242,840						$	6,302,941
Net interest income (FTE)				$	44,715						$	43,337
Net interest margin (FTE)						3.17	%						3.07	%
Net interest spread (FTE)						2.81	%						2.71	%

(1) Interest on loans includes net fees on loans that are not material in amount.

(2) For the purpose of calculating the average yield, the average balance of securities is presented at historical cost.

Note: As of June 30, 2019 and March 31, 2019, loans totaling $16.4 million and $17.7 million, respectively, were on nonaccrual status. Our policy is to reverse previously accrued but unpaid interest on nonaccrual loans; thereafter, interest income is recorded to the extent received when appropriate.

Page-10

Southside Bancshares, Inc.

Average Balances and Average Yields and Rates (Annualized) (Unaudited)

(Dollars in thousands)

	Three Months Ended
	December 31, 2018							September 30, 2018
	Avg Balance			Interest		Avg Yield/Rate		Avg Balance			Interest		Avg Yield/Rate
ASSETS
Loans (1)	$	3,289,840		$	41,320	4.98	%	$	3,286,664		$	40,396	4.88	%
Loans held for sale	633			8		5.01	%	1,841			25		5.39	%
Securities:
Taxable investment securities (2)	13,066			103		3.13	%	4,285			36		3.33	%
Tax-exempt investment securities (2)	722,162			7,828		4.30	%	795,397			8,132		4.06	%
Mortgage-backed and related securities (2)	1,434,982			10,394		2.87	%	1,418,114			10,086		2.82	%
Total securities	2,170,210			18,325		3.35	%	2,217,796			18,254		3.27	%
Federal Home Loan Bank stock, at cost, and equity investments	44,304			393		3.52	%	54,216			377		2.76	%
Interest earning deposits	36,098			411		4.52	%	77,977			414		2.11	%
Federal funds sold	16,967			97		2.27	%	16,072			77		1.90	%
Total earning assets	5,558,052			60,554		4.32	%	5,654,566			59,543		4.18	%
Cash and due from banks	79,544							78,623
Accrued interest and other assets	452,257							477,737
Less:  Allowance for loan losses	(26,231		)					(25,646		)
Total assets	$	6,063,622						$	6,185,280
LIABILITIES AND SHAREHOLDERS’ EQUITY
Savings accounts	$	361,407		257		0.28	%	$	362,405		258		0.28	%
Certificates of deposit	1,123,101			5,170		1.83	%	1,173,672			4,744		1.60	%
Interest bearing demand accounts	1,968,786			4,908		0.99	%	1,953,904			4,495		0.91	%
Total interest bearing deposits	3,453,294			10,335		1.19	%	3,489,981			9,497		1.08	%
Federal Home Loan Bank borrowings	612,134			3,066		1.99	%	654,153			3,108		1.88	%
Subordinated notes, net of unamortized debt issuance costs	98,385			1,431		5.77	%	98,346			1,423		5.74	%
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,245			699		4.60	%	60,244			684		4.50	%
Other borrowings	16,405			81		1.96	%	9,651			30		1.23	%
Total interest bearing liabilities	4,240,463			15,612		1.46	%	4,312,375			14,742		1.36	%
Noninterest bearing deposits	1,034,556							1,064,797
Accrued expenses and other liabilities	47,234							48,699
Total liabilities	5,322,253							5,425,871
Shareholders’ equity	741,369							759,409
Total liabilities and shareholders’ equity	$	6,063,622						$	6,185,280
Net interest income (FTE)				$	44,942						$	44,801
Net interest margin (FTE)						3.21	%						3.14	%
Net interest spread (FTE)						2.86	%						2.82	%

(1) Interest on loans includes net fees on loans that are not material in amount.

(2) For the purpose of calculating the average yield, the average balance of securities is presented at historical cost.

Note: As of December 31, 2018 and September 30, 2018, loans totaling $35.8 million and $32.5 million, respectively, were on nonaccrual status. Our policy is to reverse previously accrued but unpaid interest on nonaccrual loans; thereafter, interest income is recorded to the extent received when appropriate.

Page-11

Southside Bancshares, Inc.

Average Balances and Average Yields and Rates (Annualized) (Unaudited)

(Dollars in thousands)

	Three Months Ended
	June 30, 2018
	Avg Balance			Interest		Avg Yield/Rate
ASSETS
Loans (1)	$	3,285,756		$	39,865	4.87	%
Loans held for sale	1,794			19		4.25	%
Securities:
Taxable investment securities (2)	6,891			51		2.97	%
Tax-exempt investment securities (2)	802,611			8,004		4.00	%
Mortgage-backed and related securities (2)	1,439,810			10,210		2.84	%
Total securities	2,249,312			18,265		3.26	%
Federal Home Loan Bank stock, at cost, and equity investments	54,729			411		3.01	%
Interest earning deposits	92,291			400		1.74	%
Federal funds sold	16,251			71		1.75	%
Total earning assets	5,700,133			59,031		4.15	%
Cash and due from banks	75,560
Accrued interest and other assets	473,142
Less:  Allowance for loan losses	(24,558		)
Total assets	$	6,224,277
LIABILITIES AND SHAREHOLDERS’ EQUITY
Savings accounts	$	360,340		208		0.23	%
Certificates of deposit	1,175,230			4,303		1.47	%
Interest bearing demand accounts	1,981,427			4,070		0.82	%
Total interest bearing deposits	3,516,997			8,581		0.98	%
Federal Home Loan Bank borrowings	692,386			3,007		1.74	%
Subordinated notes, net of unamortized debt issuance costs	98,306			1,407		5.74	%
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,243			658		4.38	%
Other borrowings	9,283			33		1.43	%
Total interest bearing liabilities	4,377,215			13,686		1.25	%
Noninterest bearing deposits	1,045,298
Accrued expenses and other liabilities	50,843
Total liabilities	5,473,356
Shareholders’ equity	750,921
Total liabilities and shareholders’ equity	$	6,224,277
Net interest income (FTE)				$	45,345
Net interest margin (FTE)						3.19	%
Net interest spread (FTE)						2.90	%

(1) Interest on loans includes net fees on loans that are not material in amount.

(2) For the purpose of calculating the average yield, the average balance of securities is presented at historical cost.

Note: As of June 30, 2018, loans totaling $35.4 million were on nonaccrual status. Our policy is to reverse previously accrued but unpaid interest on nonaccrual loans; thereafter, interest income is recorded to the extent received when appropriate.

Page-12

Southside Bancshares, Inc.

Average Balances and Average Yields and Rates (Annualized) (Unaudited)

(Dollars in thousands)

	Six Months Ended
	June 30, 2019							June 30, 2018
	Avg Balance			Interest		Avg Yield/Rate		Avg Balance			Interest		Avg Yield/Rate
ASSETS
Loans (1)	$	3,342,244		$	85,769	5.17	%	$	3,293,090		$	79,266	4.85	%
Loans held for sale	1,292			28		4.37	%	1,669			30		3.62	%
Securities:
Investment securities (taxable) (2)	3,000			55		3.70	%	23,022			278		2.44	%
Investment securities (tax-exempt) (2)	559,041			10,245		3.70	%	803,844			16,004		4.01	%
Mortgage-backed and related securities (2)	1,663,926			25,720		3.12	%	1,498,151			21,104		2.84	%
Total securities	2,225,967			36,020		3.26	%	2,325,017			37,386		3.24	%
Federal Home Loan Bank stock, at cost, and other investments	53,034			795		3.02	%	60,831			825		2.73	%
Interest earning deposits	65,357			797		2.46	%	99,848			799		1.61	%
Federal funds sold	5,489			86		3.16	%	14,759			120		1.64	%
Total earning assets	5,693,383			123,495		4.37	%	5,795,214			118,426		4.12	%
Cash and due from banks	80,940							76,789
Accrued interest and other assets	523,926							483,086
Less:  Allowance for loan losses	(25,943		)					(22,791		)
Total assets	$	6,272,306						$	6,332,298
LIABILITIES AND SHAREHOLDERS’ EQUITY
Savings deposits	$	362,947		520		0.29	%	$	357,073		392		0.22	%
Time deposits	1,136,738			11,558		2.05	%	1,172,658			8,198		1.41	%
Interest bearing demand deposits	1,976,205			10,620		1.08	%	1,995,214			7,442		0.75	%
Total interest bearing deposits	3,475,890			22,698		1.32	%	3,524,945			16,032		0.92	%
Federal Home Loan Bank borrowings	785,901			8,356		2.14	%	809,879			6,639		1.65	%
Subordinated notes, net of unamortized debt issuance costs	98,448			2,810		5.76	%	98,287			2,805		5.76	%
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,247			1,447		4.84	%	60,242			1,227		4.11	%
Other borrowings	15,653			132		1.70	%	8,696			44		1.02	%
Total interest bearing liabilities	4,436,139			35,443		1.61	%	4,502,049			26,747		1.20	%
Noninterest bearing deposits	1,000,623							1,031,065
Accrued expenses and other liabilities	81,167							47,034
Total liabilities	5,517,929							5,580,148
Shareholders’ equity	754,377							752,150
Total liabilities and shareholders’ equity	$	6,272,306						$	6,332,298
Net interest income (FTE)				$	88,052						$	91,679
Net interest margin on average earning assets (FTE)						3.12	%						3.19	%
Net interest spread (FTE)						2.76	%						2.92	%

(1) Interest on loans includes net fees on loans that are not material in amount.

(2) For the purpose of calculating the average yield, the average balance of securities is presented at historical cost.

Note: As of June 30, 2019 and 2018, loans totaling $16.4 million and $35.4 million, respectively, were on nonaccrual status. Our policy is to reverse previously accrued but unpaid interest on nonaccrual loans; thereafter, interest income is recorded to the extent received when appropriate.

Page-13

Southside Bancshares, Inc.

Non-GAAP Reconciliation (Unaudited)

(Dollars and shares in thousands, except per share data)

The following tables set forth the reconciliation of return on average common equity to return on average tangible common equity, book value per share to tangible book value per share, net interest income to net interest income adjusted to a fully taxable-equivalent basis assuming a 21% marginal tax rate for interest earned on tax-exempt assets such as municipal loans and investment securities, along with the calculation of total revenue, adjusted noninterest expense, efficiency ratio (FTE), net interest margin (FTE) and net interest spread (FTE) for the applicable periods presented.

	Three Months Ended															Six Months Ended
	2019						2018									2019			2018
	June 30,			Mar. 31,			Dec. 31,			Sept. 30,			June 30,			June 30,			June 30,
Reconciliation of return on average common equity to return on average tangible common equity:
Net income	$	18,610		$	18,817		$	17,381		$	20,303		$	20,203		$	37,427		$	36,454
After-tax amortization expense	892			931			970			1,010			1,049			1,823			2,138
Adjusted net income available to common shareholders	$	19,502		$	19,748		$	18,351		$	21,313		$	21,252		$	39,250		$	38,592
Average shareholders' equity	$	771,344		$	737,221		$	741,369		$	759,409		$	750,921		$	754,377		$	752,150
Less: Average intangibles for the period	(217,266		)	(218,438		)	(219,645		)	(220,956		)	(222,342		)	(217,849		)	(223,021		)
Average tangible shareholders' equity	$	554,078		$	518,783		$	521,724		$	538,453		$	528,579		$	536,528		$	529,129
Return on average tangible common equity	14.12		%	15.44		%	13.95		%	15.70		%	16.13		%	14.75		%	14.71		%
Reconciliation of book value per share to tangible book value per share:
Common equity at end of period	$	787,765		$	758,033		$	731,291		$	752,506		$	751,810		$	787,765		$	751,810
Less: Intangible assets at end of period	(216,587		)	(217,716		)	(218,895		)	(220,125		)	(221,533		)	(216,587		)	(221,533		)
Tangible common shareholders' equity at end of period	$	571,178		$	540,317		$	512,396		$	532,381		$	530,277		$	571,178		$	530,277
Total assets at end of period	$	6,372,870		$	6,217,196		$	6,123,494		$	6,105,354		$	6,250,173		$	6,372,870		$	6,250,173
Less: Intangible assets at end of period	(216,587		)	(217,716		)	(218,895		)	(220,125		)	(221,533		)	(216,587		)	(221,533		)
Tangible assets at end of period	$	6,156,283		$	5,999,480		$	5,904,599		$	5,885,229		$	6,028,640		$	6,156,283		$	6,028,640
Period end tangible equity to period end tangible assets	9.28		%	9.01		%	8.68		%	9.05		%	8.80		%	9.28		%	8.80		%
Common shares outstanding end of period	33,749			33,718			33,725			35,160			35,084			33,749			35,084
Tangible book value per common share	$	16.92		$	16.02		$	15.19		$	15.14		$	15.11		$	16.92		$	15.11
Reconciliation of efficiency ratio to efficiency ratio (FTE), net interest margin to net interest margin (FTE) and net interest spread to net interest spread (FTE):
Net interest income (GAAP)	$	43,131		$	41,125		$	42,410		$	42,410		$	43,111		$	84,256		$	87,244
Tax equivalent adjustments:
Loans	598			598			599			590			583			1,196			1,165
Investment securities (tax-exempt)	986			1,614			1,933			1,801			1,651			2,600			3,270
Net interest income (FTE) (1)	44,715			43,337			44,942			44,801			45,345			88,052			91,679
Noninterest income	11,254			9,538			10,134			10,022			11,007			20,792			20,617
Nonrecurring income (2)	(557		)	171			(66		)	741			(304		)	(386		)	523
Total revenue	$	55,412		$	53,046		$	55,010		$	55,564		$	56,048		$	108,458		$	112,819
Noninterest expense	$	29,700		$	29,627		$	30,196		$	28,962		$	29,274		$	59,327		$	60,941
Pre-tax amortization expense	(1,129		)	(1,179		)	(1,228		)	(1,279		)	(1,328		)	(2,308		)	(2,706		)
Nonrecurring expense (3)	(67		)	18			(264		)	(507		)	(1,287		)	(49		)	(2,465		)
Adjusted noninterest expense	$	28,504		$	28,466		$	28,704		$	27,176		$	26,659		$	56,970		$	55,770
Efficiency ratio	52.95		%	56.00		%	54.70		%	51.11		%	49.54		%	54.43		%	51.46		%
Efficiency ratio (FTE) (1)	51.44		%	53.66		%	52.18		%	48.91		%	47.56		%	52.53		%	49.43		%
Average earning assets	$	5,654,086		$	5,733,116		$	5,558,052		$	5,654,566		$	5,700,133		$	5,693,383		$	5,795,214
Net interest margin	3.06		%	2.91		%	3.03		%	2.98		%	3.03		%	2.98		%	3.04		%
Net interest margin (FTE) (1)	3.17		%	3.07		%	3.21		%	3.14		%	3.19		%	3.12		%	3.19		%
Net interest spread	2.69		%	2.56		%	2.68		%	2.65		%	2.75		%	2.63		%	2.77		%
Net interest spread (FTE) (1)	2.81		%	2.71		%	2.86		%	2.82		%	2.90		%	2.76		%	2.92		%

(1) These amounts are presented on a fully taxable-equivalent basis and are non-GAAP measures.

(2) These adjustments may include net gain and loss on sale of securities available for sale, loss on fair value hedge, other-than-temporary impairment charges and additional bank owned life insurance income realized as a result of the death benefits for a retired covered officer, in the periods where applicable.

(3) These adjustments may include acquisition expenses, foreclosure expenses and branch closure expenses, in the periods where applicable.

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