For additional information:
           Mark W. Funke
           President & CEO
           Joe T. Shockley, Jr.
           EVP & CFO
           (405) 372-2230

For Immediate Release

Southwest Bancorp, Inc. Reports Results forThirdQuarter 2016

and Announces Quarterly Dividend

October 18, 2016, Stillwater, Oklahoma . . . . Southwest Bancorp, Inc. (NASDAQ Global Select Market - OKSB), (“Southwest”), today reported net income for the thirdquarter of 2016 of  $4.3 million, or $0.23 per diluted share, compared to $4.1 million, or $0.22per diluted share, for the thirdquarter of 2015.Net income for the nine months ended September 30, 2016 totaled $11.5million, or $0.60 per diluted share, compared to $12.8 million, or $0.67 per diluted share, for the nine months ended September 30, 2015.

Southwestannouncedthat its board of directors has approved aquarterly cash dividendof $0.08 per sharepayableNovember 15, 2016to shareholders of record as ofNovember 1, 2016.

Mark Funke, President and CEO, stated, “Loan growth was solid in the third quarter andthere was good improvement in noninterest income.Here are several takeaways from this quarter.

· Total loans grew $58.7 millionto $1.9 billion from the second quarter of 2016 and $332.0 million, or 21%,  compared to the thirdquarter of 2015.We  funded $98.2 million in new loans  during the thirdquarter of 2016, making this our eleventh consecutive quarter of loan growth.

· The quarterly net interest margin was 3.42%  at September30, 2016, compared to 3.48% at June 30, 2016 and 3.34% at September 30, 2015.

· Pre-tax, pre-provision income was $8.3 million in the thirdquarter, an increase of 3.9% from $8.0 million in the secondquarter of 2016 and an increase of 29.1% from $6.5 million in the thirdquarter of 2015.

· During the third quarter of 2016, we incurred $0.4 million in restructuring charges for branch closures and personnel reductions.

· The efficiency ratio for the third quarter of 2016 was 66.09%, compared to 65.70% for the second quarter of 2016 and 68.25% for the third quarter of 2015.

· During the third quarter of 2016, Southwest repurchased 61,639 shares for a total of $1.0 million. During the first nine months of 2016, Southwest repurchased 1,398,026 shares for a total of $22.1 million, and since August 2014, Southwest has repurchased 2,519,584 shares under the share repurchase programs for a total of $40.8 million.

“Diluted earnings per share of $0.23 was up 4.5% from the same quarter a year ago. During the third quarter, we initiated the closure of three small branches combined with some personnel reductions. These tough decisions will allow us to operate more efficiently going forward. We  will continue to focus our company on producing consistent, conservative, and sustainable earnings through the expansion of our revenue base while prudently managing risk and expenses.”

See Table 3 for details on pre-tax, pre-provision income, which is a non-GAAP financial measure.

Financial Overview

Condition:As of September 30, 2016, total assets were $2.5 billion, an increase of $65.8 million,when compared toJune30, 2016.As of September 30, 2016, total loans were $1.9 billion, an increaseof $58.7 million from the prior quarter end.As of September 30, 2016,  investment securitieswere $427.9 million, anincreaseof $5.6 million from the prior quarter end.Cash and cash equivalents at September 30, 2016  were $70.1million,  an increase of $2.0 million from June30, 2016. 

At September 30, 2016, the allowance for loan losses was $28.5 million,anincrease of  $1.6 million when compared to June 30, 2016 and an increase of  $1.9 million when compared to September 30, 2015.  The allowance for loan losses to portfolio loans was 1.52%  as of September 30, 2016,  compared to 1.48% as of June 30, 2016,  and1.73% as of September 30, 2015.  The allowance for loan losses to nonperforming loans was 116.02%  as of September 30, 2016, compared to 120.39% as of June 30, 2016 and 176.38% as of September 30, 2015.The total allowance for loan losses combined with the purchase discount on acquired loans represents1.78% of gross loans as of September 30, 2016, compared to 1.87% as of June 30, 2016.

Nonperforming loans were  $24.5  million at September 30, 2016,  an increase of $2.2 million from June 30, 2016,and an increase of $9.4 millionfrom September 30, 2015.  Other real estate was $2.1 million at both September 30, 2016 and June 30, 2016,and$2.3 million at September 30, 2015.  Nonperforming assets were $26.6 million, or 1.42% of portfolio loans and other real estate, as of September 30, 2016, compared to $24.4 million, or 1.35% of portfolio loans and other real estate, as ofJune 30, 2016, and $17.4 million, or 1.12% of portfolio loans and other real estate, as of September 30, 2015.  

As of September 30, 2016, total deposits were $1.9 billion, an increase of $45.1  million,  when compared toJune 30, 2016.Total core funding, which includes all non-brokered deposits and sweep repurchase agreements, comprised81%of  total funding as of September 30, 2016 and June 30, 2016.  Wholesale funding, including Federal Home Loan Bank borrowings and brokered deposits, accounted for 19%  of total funding at September 30, 2016 and June 30, 2016.  See Table 7  for details on core funding and non-brokered deposits, which are non-GAAP financial measures.

The capital ratios of Southwest and Bank SNB as of September 30, 2016 exceeded the criteria for regulatory classification as “well-capitalized”. Southwest’s total regulatory capital was $341.2 million, for a total risk-based capital ratio of 15.21%, Common Equity Tier 1 capital was $268.0 million, for a Common Equity Tier 1 ratio of 11.95%, and Tier 1 capital was $313.0million, for a Tier 1 risk-based capital ratio of 13.95%.Bank SNB had total regulatory capital of $321.7 million, for a total risk-based capital ratio of 14.37% and Common Equity Tier 1 and Tier 1 capital of $293.6million, for a Common Equity Tier 1 and Tier 1 risk-based capital ratio of 13.12%.Designation as a well-capitalized institution under regulations does not constitute a recommendation or endorsement by bank regulators.

ThirdQuarter Results:

Summary:  For the thirdquarter of 2016, net income was $4.3 million, compared to $5.4 million for the secondquarter of 2016 and $4.1 million for the thirdquarter of 2015.  Pre-tax, pre-provision income for the thirdquarter of 2016 was $8.3 million, compared to $8.0 million for the secondquarter of 2016 and $6.4 million for the thirdquarter of 2015.

The $1.1 million decrease in net income compared to the secondquarter of 2016was primarily due tothe $1.7 million provision for loan losses recorded in the third quarter, combined with $0.4 million in restructuring charges.  The decrease in net income also includes a $0.1 million increase in net interest income, a $0.7 million increase in noninterest income and a $0.6 million decrease in income taxes, offset in part by a $0.9 million increase in noninterest expense.  

The $0.2 million increase in net income compared to the thirdquarter of 2015 was due to a $3.3 million increase in net interest income and a $0.5 million increase in noninterest income, offset in part by a $1.7 million increase in the provision for loan losses, and a  $2.1 million increase in noninterest expense.The increases in net interest income, noninterest income, and noninterest expense are due in part to the First Commercial Bancshares, Inc. acquisition that occurred in the fourth quarter of 2015.

Net Interest Income:Net interest income totaled $19.8million forthe thirdquarter of 2016, compared to $19.7 million for the secondquarter of 2016 and$16.5 million for the thirdquarter of 2015.Net interest margin was 3.42% for the thirdquarter of 2016, compared to 3.48% for the secondquarter of 2016 and 3.34% for the third quarter of 2015.Interest income forthe thirdquarter of 2016 and the second quarter of 2016includes $0.5 million and $0.2 million,  of accelerated discount accretion, respectively. The net effects of these adjustments on the net interest margins  were a 10 basis point and a3 basis pointincrease, respectively, for each quarter.Average loans (including loans held for sale) for the thirdquarter of 2016increased $33.2millionwhen compared to June 30, 2016, and $359.5 million when compared to September30, 2015.Loans acquired in the fourth quarter of 2015 were $202.4 million. The benefit of the accelerated loan discount accretion was partially reduced by a $0.2 million decrease in interest income on investment securities caused by accelerated premium amortization, resulting from increased prepayment speeds.

Provision (Credit) for Loan Losses and Net Charge-offs:  The provision for loan losses is the amount that is required to maintain the allowance for loan losses at an appropriate level based upon the inherent risks in the loan portfolio after the effects of net charge-offs or net recoveries for the period. The provision for loan losses was a provision of $1.7 million for the third quarter of 2016, compared to a provision of $10,000 for the second quarter of 2016, and a  provision of $23,000 for the third quarter of 2015.  The third quarter 2016 provision was driven primarily by the growth in the loan portfolio and changes in nonperforming loans.  During the third quarter of 2016,  netcharge-offs totaled $0.1 million, or 0.03%  (annualized) of average portfolio loans, compared to net charge-offs of $0.3 million, or 0.07% (annualized) of average portfolio loans for the secondquarter of 2016 and net recoveriesof $0.4 million, or (0.09%) (annualized) of average portfolio loans for the third quarter of 2015.

Noninterest Income:  Noninterest income totaled $4.6  million for the third quarter of 2016, compared to $3.9 million for the secondquarter of 2016 and $4.0 million for the third quarter of 2015.

The $0.7 million increase  from the second quarter of 2016is the result ofa  $0.1 million increase in service charges and fees, a $0.1 million increase in the gain on sales of mortgage loansand a $0.7 million increase in other noninterest income, which is primarily from customer risk management interest rate swap income, partially offset by a $0.2 million decrease in gain on sale of investment securities.Service charges and fees includes a $0.1 million and a $0.2 million impairment on mortgage servicing rights for the third quarter of 2016 and the second quarter of 2016, respectively. Other noninterest income includes a $0.1 million loss on disposition of fixed assets related to branch closures.

The $0.5 million increase from the third quarter of 2015 is the result of a  $0.2 million increase in service charges and fees, a $0.2 million increase in the gain on sales of mortgage loansand a$0.1 million increase in other noninterest income, which is primarily from customer risk management interest rate swap income.

Noninterest Expense:Noninterest expense totaled $16.2million for the third quarter of 2016, compared to $15.3 million for the second quarter of 2016 and$14.1 million for the third quarter of 2015. 

The $0.9 million increase in noninterest expense from the second quarter of 2016 was due to a $0.2 million increase in personnel expense,  a $0.4 million increase in occupancy, a $0.2 million increase in data processing, and a $0.4 million increase in the provision for unfunded loan commitments,offset in part by a $0.2 million decrease in other real estate expenses due to gains on the sales of properties during the quarter.The increase in personnel expense was due to severance and employee benefits, combined with increased mortgage commissions.

The $2.1 million increase in noninterest expense from the third quarter of 2015 consisted of a  $1.4 million increase in personnel expense, a $0.8 million increase in occupancy related to branch closures,  a $0.1 million increase in data processing and a $0.1 million increase in the provision for unfunded loan commitments,  offset in part by a $0.3 million decrease in other real estate expenseanda $0.1 million decrease in general and administrative expense.

Income Tax:  Income tax expense totaled $2.2  million for the third quarter of 2016, compared to  $2.9 million for the second quarter of 2016 and$2.3 million for the third quarter of 2015.  The income tax expense fluctuates in relation to pre-tax income levels. The third quarter of 2016 effective tax rate was 34.45%,  compared to 34.70% for the second quarter of 2016 and 35.84% for the third quarter of 2015. The decline in the effective tax rate includes the impact of an increase in tax exempt income, as a percentage of pre-tax income.

Year-to-Date Results:

Summary:  Net income was $11.5 million for the nine months ended September 30, 2016, compared to $12.8 million for the nine months ended September 30, 2015. The $1.3 million decrease in net income from 2015 is the result of a $9.1 million change in the provision for loan losses and a $6.3 million increase in noninterest expense due to increased personnel, occupancy, and general and administrative expenses, offset in part by an  $11.4 million increase in net interest income, a $1.6 million increase in noninterest income, and a $1.1 million decrease in income taxes. The increases in net interest income, noninterest income, and noninterest expense, are due in part to the First Commercial Bancshares, Inc. acquisition that occurred in the fourth quarter of 2015. Net income for the nine months ended September 30, 2016, was also reduced by the restructuring charges of $0.4 million incurred in the third quarter of 2016.

Net Interest Income:Net interest income totaled $59.3 million for the first nine months of 2016, compared to $47.9 million for the first nine months of 2015, an increase of $11.4 million.  Year-to-date net interest margin was 3.48%, compared to 3.30% for 2015.  Interest income for the first nine months of 2016 includes $1.0 millionof accelerated discount accretion. The net effect on the net interest margin was a 6 basis point increase for the nine-month period.  Average loans (including loans held for sale) as of September 30,  2016 increased $363.2 millionwhen compared to September 30, 2015. Loans acquired in the fourth quarter of 2015 were $202.4 million.

Provision (Credit) for Loan Losses and Net Charge-offs:  The provision for loan losses is the amount of expense that is required to maintain the allowance for losses at an appropriate level based upon the inherent risks in the loan portfolio after the effects of net charge-offs or net recoveries for the period. The provision for loan losses was $6.1 million for the first nine months of 2016, compared to a negative provision of $3.0 million for the first nine months of 2015. The provision for loan losses for the first nine months of 2016 was driven by the growth in the loan portfolio and the impact of low energy prices combined with deterioration in a few general business credits.  Net charge-offs totaled $3.8 million, or 0.28% (annualized) of average portfolio loans year-to-date as of September 30, 2016, compared to net recoveries of $1.1 million, or (0.11%) (annualized) of average portfolio loans for the same period in 2015.  

Noninterest Income:  Noninterest income totaled $11.8 million for the first nine months of 2016, compared to $10.3 million for the first nine months of 2015. The increase consists of a $0.5 million increase in service charges and fees, which for the first nine months of 2016 includes a $0.6 million impairment of mortgage servicing rights, a $0.4 million increase in gains on sales of mortgage loans, a $0.1 million increase in the gain on sale of investment securities,  and a $0.6 million increase in other noninterest income, which includes income on bank owned life insurance and customer risk management interest rate swap income.

Noninterest Expense:Noninterest expense totaled $47.4 million for the first nine months of 2016, compared to $41.1 million for the first nine months of 2015.  The increase consists of a $4.1 million increase in personnel expense, a $1.7 million increase in occupancy, a $0.2 million increase in data processing, a $0.2 million increase in FDIC and other insurance, a $0.2 million increase in the provision for unfunded loan commitments, and a $0.3 million increase in general and administrative expense, offset in part by a $0.4 million decrease in other real estate expense.

Income Tax:  Income tax expense totaled $6.1 million for the first nine months of 2016, compared to $7.2 million for the first nine months of 2015.  The income tax expense fluctuates in relation to pre-tax income levels. The year-to-date effective tax rate was 34.69% as of September 30, 2016, compared to 36.02% as of September 30, 2015. The decline in the effective tax rate includes the impact of an increase in tax exempt income, as a percentage of pre-tax income.

Conference Call

Southwest will host a conference call to review these results on Wednesday, October19, 2016 at 11:00 a.m. Eastern Time (10:00 a.m. Central Time). Investors, news media, and others may pre-register for the call using the following link to receive a special dial-in number and PIN:  http://dpregister.com/10093635. Telephone participants who are unable to pre-register may access the call by telephone at 866-218-2402 (toll-free) or 412-902-4190 (international). Participants are encouraged to dial into the call approximately 10 minutes prior to the start time. The call and corresponding presentation slides will be webcast live on Southwest’s website at www.oksb.com or http://services.choruscall.com/links/oksb161019. An audio replay will be available one hour after the call at 877-344-

7529 (toll-free) or 412-317-0088 (international),  conference number 10093635. Telephone replay access will be available until November19, 2016.

Southwest Bancorp and Subsidiaries

Southwest is the holding company for Bank SNB, an Oklahoma state banking corporation(“Bank SNB”). Bank SNB offers commercial and consumer lending, deposit services, specialized cash management, and other financial services from offices in Oklahoma, Texas, Kansas, and Colorado.  Bank SNB was chartered in 1894 and Southwest was organized in 1981 as the holding company. At September 30, 2016,  Southwest had total assets of approximately  $2.5 billion, deposits of $1.9 billion, and shareholders’ equity of $283.8 million.

Southwest’s area of expertise focuses on the special financial needs of healthcare and health professionals, businesses and their managers and owners, commercial lending, energy banking, and commercial real estate borrowers. The strategic focus on healthcare lending was established in 1974. Southwest and its banking subsidiaryprovide credit and other remittance services, such as deposits, cash management, and document imaging for physicians and other healthcare practitioners to start or develop their practices and finance the development and purchase of medical offices, clinics, surgical care centers, hospitals, and similar facilities. As of September 30, 2016, approximately $443.6 million, or 24%,  of loans were loans to individuals and businesses in the healthcare industry. Regular market reviews are conducted of (i) current and potential healthcare lending business,and (ii) the appropriate concentrations within healthcare based upon economic and regulatory conditions.

Southwest’s common stock is traded on the NASDAQ Global Select Market under the symbol OKSB. 

Caution About Forward-Looking Statements

Southwest makes forward-looking statements in this news release that are subject to risks and uncertainties.  These statements are intended to be covered by the safe harbor provision for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

These forward-looking statements include: 

· Statements of Southwest's goals, intentions, and expectations;

· Estimates of risks and of future costs and benefits;

· Expectations regarding Southwest’s future financial performance and the financial performance of its operating segments;

· Expectations regarding regulatory actions;

· Expectations regarding Southwest’s ability to utilize tax loss benefits;

· Expectations regarding Southwest’s stock repurchase program;

· Expectations regarding dividends;

· Expectations regarding acquisitions and divestitures;

· Assessments of loan quality, probable loan losses or negative provisions, and the amount and timing of loan payoffs;

· Estimates of the value of assets held for sale or available for sale; and

· Statements of Southwest’s ability to achieve financial and other goals.

These forward-looking statements are subject to significant uncertainties because they are based upon: the amount and timing of future changes in interest rates, market behavior, and other economic conditions; future laws, regulations, and accounting principles; changes in regulatory standards and examination policies, and a variety of other matters. These other matters include, among other things, the direct and indirect effects of economic conditions on interest rates, credit quality, loan demand, liquidity, and monetary and supervisory policies of banking regulators. Because of these uncertainties, the actual future results may be materially different from the results indicated by these forward-looking statements. In addition, Southwest's past growth and performance do not necessarily indicate future results. For other factors, risks, and uncertainties that could cause actual results to differ materially from estimates and projections contained in forward-looking statements, please read Southwest’s reports filed with the Securities and Exchange Commission, including its Annual Report on Form 10-K for the year ended December 31, 2015. You are urged to carefully review and consider the cautionary statements and other disclosures made in those filings, specifically those under the heading “Risk Factors”.

The cautionary statements in this release also identify important factors and possible events that involve risk and uncertainties that could cause actual results to differ materially from those contained in the forward-looking statements. These forward-looking statements speak only as of the date on which the statements were made. Southwest does not intend, and undertakes no obligation, to update or revise any forward-looking statements contained in this release, whether as a result of differences in actual results, changes in assumptions, or changes in other factors affecting such statements, except as required by law.

Southwest is required under generally accepted accounting principles to evaluate subsequent events and their impact, if any, on its financial statements as of September 30, 2016 through the date its financial statements are filed with the Securities and Exchange Commission. The September 30,  2016 financial statements included in this release will be adjusted if necessary to properly reflect the impact of subsequent events on estimates used to prepare those statements. 

The Southwest Bancorp, Inc. logo is available at

http://www.globenewswire.com/newsroom/prs/?pkgid=8074

The Bank SNB logo is available at

http://www.globenewswire.com/newsroom/prs/?pkgid=23106

Financial Tables

Unaudited Financial Highlights	Table 1
Unaudited Consolidated Statements of Financial Condition	Table 2
Unaudited Consolidated Statements of Operations	Table 3
Unaudited Average Balances, Yields, and Rates-Quarterly	Table 4
Unaudited Average Balances, Yields, and Rates-YTD	Table 5
Unaudited Quarterly Summary Loan Data	Table 6
Unaudited Quarterly Summary Financial Data	Table 7
Unaudited Quarterly Supplemental Analytical Data	Table 8

SOUTHWEST BANCORP, INC.
UNAUDITED FINANCIAL HIGHLIGHTS
(Dollars in thousands, except per share) Table 1

	Third Quarter					Second Quarter
QUARTERLY HIGHLIGHTS	2016		2015		% Change	2016		% Change
Operations
Net interest income	$	19,805	$	16,496	20%	$	19,695	1%
Provision (credit) for loan losses		1,713		23	7,348		10	17,030
Noninterest income		4,555		4,029	13		3,871	18
Noninterest expense		16,156		14,077	15		15,268	6
Income before taxes		6,491		6,425	1		8,288	(22)
Taxes on income		2,236		2,303	(3)		2,876	(22)
Net income		4,255		4,122	3		5,412	(21)
Diluted earnings per share		0.23		0.22	5		0.28	(18)
Balance Sheet
Total assets		2,468,042		2,059,899	20		2,402,262	3
Loans held for sale		7,899		7,024	12		7,090	11
Portfolio loans		1,872,213		1,541,070	21		1,814,287	3
Total deposits		1,947,924		1,626,250	20		1,902,865	2
Total shareholders' equity		283,820		277,344	2		282,360	1
Book value per common share		15.19		14.57	4		15.06	1
Key Ratios
Net interest margin		3.42%		3.34%			3.48%
Efficiency ratio		66.09		68.25			65.70
Total capital to risk-weighted assets		15.21		18.21			15.56
Nonperforming loans to portfolio loans		1.31		0.98			1.23
Shareholders' equity to total assets		11.50		13.46			11.75
Tangible common equity to tangible assets*		10.92		13.40			11.16
Return on average assets (annualized)		0.70		0.81			0.91
Return on average common equity (annualized)		5.97		5.94			7.67
Return on average tangible common equity (annualized)**		6.33		5.97			8.13
	Nine Months
YEAR-TO-DATE  HIGHLIGHTS	2016		2015		% Change
Operations
Net interest income	$	59,340	$	47,897	24%
Provision (credit) for loan losses		6,098		(3,000)	303
Noninterest income		11,841		10,278	15
Noninterest expense		47,420		41,141	15
Income before taxes		17,663		20,034	(12)
Taxes on income		6,127		7,216	(15)
Net income		11,536		12,818	(10)
Diluted earnings per share		0.60		0.67	(11)
Balance Sheet
Total assets		2,468,042		2,059,899	20
Loans held for sale		7,899		7,024	12
Portfolio loans		1,872,213		1,541,070	21
Total deposits		1,947,924		1,626,250	20
Total shareholders' equity		283,820		277,344	2
Book value per common share		15.19		14.57	4
Key Ratios
Net interest margin		3.48%		3.30%
Efficiency ratio		66.41		70.33
Total capital to risk-weighted assets		15.21		18.21
Nonperforming loans to portfolio loans		1.31		0.98
Shareholders' equity to total assets		11.50		13.46
Tangible common equity to tangible assets*		10.92		13.40
Return on average assets (annualized)		0.65		0.86
Return on average common equity (annualized)		5.37		6.27
Return on average tangible common equity (annualized)**		5.69		6.31

Balance sheet amounts and ratios are as of period end unless otherwise noted.
* This is a Non-GAAP financial measure.  Please see Table 7 for a reconciliation to the most directly comparable GAAP based measure.
** This is a Non-GAAP financial measure.
Please see accompanying tables for additional financial information.

SOUTHWEST BANCORP, INC.
UNAUDITED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION
(Dollars in thousands) Table 2

	September 30,			December 31,			September 30,
	2016			2015			2015
Assets
Cash and due from banks	$	36,298			$	24,971		$	25,198
Interest-bearing deposits		33,799				53,158			43,447
Cash and cash equivalents		70,097				78,129			68,645
Securities held to maturity (fair values of $10,887, $12,282, and $13,462 respectively)		10,474				11,797			12,954
Securities available for sale (amortized cost of $414,830, $401,136 and $373,219, respectively)			417,464			400,331			375,589
Loans held for sale		7,899				7,453			7,024
Loans receivable		1,872,213				1,771,975			1,541,070
Less: Allowance for loan losses		(28,452)				(26,106)			(26,593)
Net loans receivable		1,843,761				1,745,869			1,514,477
Accrued interest receivable		5,839				5,767			4,872
Non-hedge derivative asset		4,123				1,793			2,344
Premises and equipment, net		23,248				23,819			18,180
Other real estate		2,106				2,274			2,274
Goodwill		13,545				13,467			1,214
Other intangible assets, net		5,819				6,615			3,973
Other assets		63,667				59,708			48,353
Total assets	$	2,468,042			$	2,357,022		$	2,059,899
Liabilities
Deposits:
Noninterest-bearing demand	$	550,121			$	596,494		$	526,159
Interest-bearing demand		146,583				151,015			114,877
Money market accounts		576,550				534,357			502,028
Savings accounts		54,849				56,333			36,163
Time deposits of $100,000 or more		347,976				311,538			238,318
Other time deposits		271,845				234,368			208,705
Total deposits		1,947,924				1,884,105			1,626,250
Accrued interest payable		969				867			778
Non-hedge derivative liability		4,123				1,793			2,344
Other liabilities		10,842				11,684			9,989
Other borrowings		173,971				110,927			96,801
Subordinated debentures		46,393				51,548			46,393
Total liabilities		2,184,222				2,060,924			1,782,555
Shareholders' equity
Common stock - $1 par value; 40,000,000 shares authorized;
21,223,895, 21,138,028 and 19,901,336 shares issued, respectively		21,224				21,138			19,901
Additional paid-in capital		122,594				121,966			101,611
Retained earnings		180,133				173,210			169,825
Accumulated other comprehensive income (loss)		1,028				(1,290)			372
Treasury stock, at cost, 2,538,510, 1,131,226 and 868,617 shares, respectively		(41,159)				(18,926)			(14,365)
Total shareholders' equity		283,820				296,098			277,344
Total liabilities and shareholders' equity	$	2,468,042			$	2,357,022		$	2,059,899

SOUTHWEST BANCORP, INC.
UNAUDITED CONSOLIDATED STATEMENTS OFOPERATIONS
(Dollars in thousands) Table 3

	For the three months ended						For the nine months
	September 30,		June 30,		September 30,		ended September 30,
	2016		2016		2015		2016		2015
Interest income
Loans	$	20,541	$	20,031	$	16,510	$	60,602	$	47,919
Investment securities		1,719		1,962		1,443		5,646		4,120
Other interest-earning assets		50		51		267		154		860
Total interest income		22,310		22,044		18,220		66,402		52,899
Interest expense
Interest-bearing deposits		1,542		1,428		905		4,277		2,602
Other borrowings		374		342		255		1,025		723
Subordinated debentures		589		579		564		1,760		1,677
Total interest expense		2,505		2,349		1,724		7,062		5,002
Net interest income		19,805		19,695		16,496		59,340		47,897
Provision (credit) for loan losses		1,713		10		23		6,098		(3,000)
Net interest income after provision for loan losses		18,092		19,685		16,473		53,242		50,897
Noninterest income
Service charges and fees		2,681		2,556		2,441		7,786		7,319
Gain on sales of mortgage loans		775		722		565		1,898		1,534
Gain on sale/call of investment securities, net		3		165		19		294		162
Other noninterest income		1,096		428		1,004		1,863		1,263
Total noninterest income		4,555		3,871		4,029		11,841		10,278
Noninterest expense
Salaries and employee benefits		9,794		9,587		8,374		28,723		24,577
Occupancy		3,103		2,669		2,288		8,443		6,773
Data processing		582		430		475		1,482		1,331
FDIC and other insurance		341		432		341		1,141		969
Other real estate, net		(233)		8		20		(212)		153
Provision (credit) for unfunded loan commitments		146		(263)		18		98		(92)
General and administrative		2,423		2,405		2,561		7,745		7,430
Total noninterest expense		16,156		15,268		14,077		47,420		41,141
Income before taxes		6,491		8,288		6,425		17,663		20,034
Taxes on income		2,236		2,876		2,303		6,127		7,216
Net income	$	4,255	$	5,412	$	4,122	$	11,536	$	12,818
Pre-tax, pre-provision income*	$	8,350	$	8,035	$	6,466	$	23,859	$	16,942
Basic earnings per common share	$	0.23	$	0.29	$	0.22	$	$0.61	$	0.67
Diluted earnings per common share		0.23		0.28		0.22		$0.60		0.67
Common dividends declared per share		0.08		0.08		0.06		0.24		0.18
*This is a Non-GAAP based financial measure.  Pre-tax, pre-provision income is calculated as follows:
Net Income + Taxes on income + Provision (credit) for loan losses + Provision (credit) for unfunded loan commitments

SOUTHWEST BANCORP, INC.
UNAUDITED AVERAGE BALANCES, YIELDS, AND RATES – QUARTERLY
(Dollars in thousands) Table 4

	For the three months ended
	September 30, 2016			June 30, 2016			September 30, 2015
	Average		Average	Average		Average	Average		Average
	Balance		Yield/Rate	Balance		Yield/Rate	Balance		Yield/Rate
Assets
Loans	$	1,832,750	4.46%	$	1,799,591	4.48%	$	1,473,297	4.45%
Investment securities		425,276	1.61		428,275	1.84		387,194	1.48
Other interest-earning assets		48,759	0.41		48,569	0.42		100,011	1.06
Total interest-earning assets		2,306,785	3.85		2,276,435	3.89		1,960,502	3.69
Other assets		107,140			103,566			65,459
Total assets	$	2,413,925		$	2,380,001		$	2,025,961
Liabilities and Shareholders' Equity
Interest-bearing demand deposits	$	152,134	0.15%	$	165,011	0.16%	$	123,829	0.12%
Money market accounts		545,040	0.26		537,734	0.25		497,935	0.17
Savings accounts		54,073	0.14		54,808	0.13		35,982	0.10
Time deposits		603,201	0.73		589,029	0.69		446,464	0.57
Total interest-bearing deposits		1,354,448	0.45		1,346,582	0.43		1,104,210	0.33
Other borrowings		163,495	0.91		141,623	0.97		76,799	1.32
Subordinated debentures		46,393	5.08		46,393	4.99		46,393	4.86
Total interest-bearing liabilities		1,564,336	0.64		1,534,598	0.62		1,227,402	0.56
Noninterest-bearing demand deposits		549,077			547,963			511,442
Other liabilities		16,937			13,598			11,708
Shareholders' equity		283,575			283,842			275,409
Total liabilities and shareholders' equity	$	2,413,925		$	2,380,001		$	2,025,961
Net interest income and spread			3.21%			3.27%			3.13%
Net interest margin (1)			3.42%			3.48%			3.34%
Average interest-earning assets
to average interest-bearing liabilities		147.46%			148.34%			159.73%
(1) Net interest margin = annualized net interest income / average interest-earning assets

SOUTHWEST BANCORP, INC.
UNAUDITED AVERAGE BALANCES, YIELDS, AND RATES – YEAR-TO-DATE
(Dollars in thousands) Table 5

	For the nine months ended September 30,
	2016			2015
	Average		Average	Average		Average
	Balance		Yield/Rate	Balance		Yield/Rate
Assets
Loans	$	1,807,204	4.48%	$	1,444,026	4.44%
Investment securities		421,965	1.79		374,987	1.47
Other interest-earning assets		49,451	0.42		120,749	0.95
Total interest-earning assets		2,278,620	3.89		1,939,762	3.65
Other assets		106,196			57,787
Total assets	$	2,384,816		$	1,997,549
Liabilities and Shareholders' Equity
Interest-bearing demand deposits	$	159,235	0.16%	$	133,447	0.10%
Money market accounts		541,870	0.25		485,571	0.16
Savings accounts		54,902	0.14		34,688	0.10
Time deposits		585,545	0.69		443,060	0.57
Total interest-bearing deposits		1,341,552	0.43		1,096,766	0.32
Other borrowings		140,846	0.97		69,908	1.38
Subordinated debentures		47,108	4.98		46,393	4.82
Total interest-bearing liabilities		1,529,506	0.62		1,213,067	0.55
Noninterest-bearing demand deposits		553,338			500,263
Other liabilities		15,108			10,879
Shareholders' equity		286,864			273,340
Total liabilities and shareholders' equity	$	2,384,816		$	1,997,549
Net interest income and spread			3.27%			3.10%
Net interest margin (1)			3.48%			3.30%
Average interest-earning assets
to average interest-bearing liabilities		148.98%			159.91%
(1) Net interest margin = annualized net interest income / average interest-earning assets

SOUTHWEST BANCORP, INC.
UNAUDITED QUARTERLY SUMMARY LOAN DATA
(Dollars in thousands) Table 6

			2016				2015
		Sep. 30	Jun. 30		Mar. 31		Dec. 31		Sep. 30		Jun. 30		Mar. 31
LOAN COMPOSITION
Real estate mortgage:
Commercial	$	893,807	$	862,287	$	878,822	$	938,462	$	869,250	$	759,406	$	759,676
One-to-four family residential		193,678		183,693		158,078		161,958		95,906		85,338		86,343
Real estate construction:
Commercial		184,211		175,805		156,454		129,070		126,407		186,140		192,052
One-to-four family residential		22,460		20,347		24,202		21,337		12,866		13,107		12,586
Commercial		566,403		558,472		543,822		507,173		423,480		384,788		366,282
Installment and consumer		19,553		20,773		20,506		21,429		20,185		20,651		21,306
Total loans, including held for sale		1,880,112		1,821,377		1,781,884		1,779,429		1,548,094		1,449,430		1,438,245
Less allowance for loan losses		(28,452)		(26,876)		(27,168)		(26,106)		(26,593)		(26,219)		(27,250)
Total loans, net	$	1,851,660	$	1,794,501	$	1,754,716	$	1,753,323	$	1,521,501	$	1,423,211	$	1,410,995
LOANS BY SEGMENT
Oklahoma banking****	$	1,117,716	$	1,085,986	$	1,060,482	$	1,048,473	$	832,282	$	810,367	$	814,949
Texas banking		605,682		577,333		560,421		580,476		563,010		493,047		478,005
Kansas banking		156,714		158,058		160,981		150,480		152,802		146,016		145,291
Total loans	$	1,880,112	$	1,821,377	$	1,781,884	$	1,779,429	$	1,548,094	$	1,449,430	$	1,438,245
NONPERFORMING LOANS BY TYPE
Construction & development	$	1,073	$	1,436	$	1,444	$	1,010	$	391	$	416	$	392
Commercial real estate		7,620		3,894		3,830		3,992		1,795		2,141		2,247
Commercial		12,791		13,800		13,461		13,491		11,727		5,114		5,447
One-to-four family residential		2,982		3,120		3,448		1,777		1,016		1,216		1,065
Consumer		58		75		84		88		148		-		-
Total nonperforming loans	$	24,524	$	22,325	$	22,267	$	20,358	$	15,077	$	8,887	$	9,151
NONPERFORMING LOANS BY SEGMENT
Oklahoma banking****	$	12,275	$	9,268	$	7,978	$	6,948	$	2,846	$	1,670	$	2,244
Texas banking		11,805		12,586		13,521		12,450		11,025		5,353		5,264
Kansas banking		444		471		768		960		1,206		1,864		1,643
Total nonperforming loans	$	24,524	$	22,325	$	22,267	$	20,358	$	15,077	$	8,887	$	9,151
OTHER REAL ESTATE BY TYPE
Construction & development	$	1,756	$	1,962	$	2,060	$	2,060	$	2,025	$	2,035	$	2,035
Commercial real estate		350		160		214		214		249		358		220
Total other real estate	$	2,106	$	2,122	$	2,274	$	2,274	$	2,274	$	2,393	$	2,255
OTHER REAL ESTATE BY SEGMENT
Oklahoma banking****	$	-	$	220	$	274	$	274	$	200	$	200	$	-
Texas banking		2,106		1,902		2,000		2,000		2,025		2,000		2,000
Kansas banking		-		-		-		-		49		193		255
Total other real estate	$	2,106	$	2,122	$	2,274	$	2,274	$	2,274	$	2,393	$	2,255
****Due to immateriality, Colorado banking is included within Oklahoma banking.
Continued

SOUTHWEST BANCORP, INC.
UNAUDITED QUARTERLY SUMMARY LOAN DATA
(Dollars in thousands) Table 6
Continued

			2016				2015
		Sep. 30	Jun. 30		Mar. 31		Dec. 31		Sep. 30		Jun. 30		Mar. 31
POTENTIAL PROBLEM LOANS BY TYPE
Construction & development	$	588	$	-	$	-	$	-	$	-	$	-	$	201
Commercial real estate		12,212		33,472		36,216		26,981		22,362		20,375		24,672
Commercial		30,555		29,537		29,931		9,879		7,366		14,519		14,016
One-to-four family residential		2,119		1,353		2,275		2,285		79		80		81
Consumer		2		2		38		10		-		-		-
Total potential problem loans	$	45,476	$	64,364	$	68,460	$	39,155	$	29,807	$	34,974	$	38,970
POTENTIAL PROBLEM LOANS BY SEGMENT
Oklahoma banking****	$	21,780	$	43,895	$	46,102	$	32,970	$	23,597	$	23,231	$	26,713
Texas banking		21,029		17,726		18,801		4,165		4,086		9,180		9,541
Kansas banking		2,667		2,743		3,557		2,020		2,124		2,563		2,716
Total potential problem loans	$	45,476	$	64,364	$	68,460	$	39,155	$	29,807	$	34,974	$	38,970
ALLOWANCE ACTIVITY
Balance, beginning of period	$	26,876	$	27,168	$	26,106	$	26,593	$	26,219	$	27,250	$	28,452
Charge-offs		626		538		3,725		569		226		325		230
Recoveries		489		236		412		648		577		430		915
Net charge-offs (recoveries)		137		302		3,313		(79)		(351)		(105)		(685)
Provision (credit) for loan losses		1,713		10		4,375		(566)		23		(1,136)		(1,887)
Balance, end of period	$	28,452	$	26,876	$	27,168	$	26,106	$	26,593	$	26,219	$	27,250
NET CHARGE-OFFS BY TYPE
Construction & development	$	-	$	-	$	-	$	-	$	(16)	$	(15)	$	5
Commercial real estate		108		(44)		(187)		219		24		82		(118)
Commercial		(64)		82		3,408		(286)		(325)		(52)		(188)
One-to-four family residential		44		(12)		41		(48)		(68)		(91)		(331)
Consumer		49		276		51		36		34		(29)		(53)
Total net charge-offs (recoveries) by type	$	137	$	302	$	3,313	$	(79)	$	(351)	$	(105)	$	(685)
NET CHARGE-OFFS BY SEGMENT
Oklahoma banking****	$	34	$	127	$	458	$	288	$	(86)	$	25	$	(309)
Texas banking		180		211		952		(415)		(103)		(72)		(114)
Kansas banking		(77)		(36)		1,903		48		(162)		(58)		(262)
Total net charge-offs (recoveries) by segment	$	137	$	302	$	3,313	$	(79)	$	(351)	$	(105)	$	(685)
****Due to immateriality, Colorado banking is included within Oklahoma banking.

SOUTHWEST BANCORP, INC.
UNAUDITED QUARTERLY SUMMARY FINANCIAL DATA
(Dollars in thousands, except per share) Table 7

			2016				2015
		Sep. 30	Jun. 30		Mar. 31		Dec. 31		Sep. 30		Jun. 30		Mar. 31
PER SHARE DATA
Basic earnings per common share	$	0.23	$	0.29	$	0.10	$	0.23	$	0.22	$	0.22	$	0.24
Diluted earnings per common share		0.23		0.28		0.10		0.23		0.22		0.22		0.24
Common dividends declared per share		0.08		0.08		0.08		0.06		0.06		0.06		0.06
Book value per common share		15.19		15.06		14.81		14.80		14.57		14.38		14.26
Tangible book value per share*		14.33		14.20		13.97		13.98		14.49		14.29		14.17
COMMON STOCK
Shares issued		21,223,895		21,223,613		21,225,034		21,138,028		19,901,336		19,900,855		19,900,350
Less treasury shares		2,538,510		2,472,830		1,939,989		1,131,226		868,617		867,310		867,310
Outstanding shares		18,685,385		18,750,783		19,285,045		20,006,802		19,032,719		19,033,545		19,033,040
OTHER FINANCIAL DATA
Investment securities	$	427,938	$	422,296	$	423,030	$	412,128	$	388,543	$	373,260	$	377,545
Loans held for sale		7,899		7,010		1,803		7,453		7,024		6,687		9,106
Portfolio loans		1,872,213		1,814,367		1,780,081		1,771,975		1,541,070		1,442,743		1,429,139
Total loans		1,880,112		1,821,377		1,781,884		1,779,428		1,548,094		1,449,430		1,438,245
Total assets		2,468,042		2,402,262		2,360,819		2,357,022		2,059,899		2,031,581		2,003,079
Total deposits		1,947,924		1,902,865		1,895,248		1,884,105		1,626,250		1,624,446		1,616,454
Other borrowings		173,971		153,568		117,763		110,927		96,801		75,839		58,578
Subordinated debentures		46,393		46,393		46,393		51,548		46,393		46,393		46,393
Total shareholders' equity		283,820		282,360		285,661		296,098		277,344		273,681		271,444
Mortgage servicing portfolio		453,988		443,568		434,340		432,318		422,845		415,961		407,903
INTANGIBLE ASSET DATA
Goodwill	$	13,545	$	13,467	$	13,467	$	13,467	$	1,214	$	1,214	$	1,214
Core deposit intangible		2,438		2,584		2,734		2,894		342		405		467
Mortgage servicing rights		3,381		3,350		3,411		3,721		3,631		3,518		3,399
Total intangible assets	$	19,364	$	19,401	$	19,612	$	20,082	$	5,187	$	5,137	$	5,080
Intangible amortization expense	$	344	$	350	$	341	$	330	$	243	$	243	$	168
DEPOSIT COMPOSITION
Non-interest bearing demand	$	550,121	$	545,421	$	552,499	$	596,494	$	526,159	$	515,156	$	506,952
Interest-bearing demand		146,583		160,886		168,210		151,015		114,877		131,547		140,659
Money market accounts		576,550		547,415		540,323		534,357		502,028		496,178		488,569
Savings accounts		54,849		55,209		56,235		56,333		36,163		35,647		34,413
Time deposits of $100,000 or more		347,976		323,137		314,496		311,538		238,318		233,105		227,426
Other time deposits		271,845		270,797		263,485		234,368		208,705		212,813		218,435
Total deposits**	$	1,947,924	$	1,902,865	$	1,895,248	$	1,884,105	$	1,626,250	$	1,624,446	$	1,616,454
OFFICES AND EMPLOYEES
FTE Employees		393		410		411		412		358		361		360
Branches		31		33		33		33		24		24		23
Assets per employee	$	6,280	$	5,859	$	5,744	$	5,721	$	5,754	$	5,628	$	5,564
____________________
*This is a Non-GAAP based financial measure.
**Calculation of Non-brokered Deposits and Core Funding (Non-GAAP Financial Measures)
Total deposits	$	1,947,924	$	1,902,865	$	1,895,248	$	1,884,105	$	1,626,250	$	1,624,446	$	1,616,454
Less:
Brokered time deposits		65,398		61,709		55,901		39,797		10,086		7,683		7,694
Other brokered deposits		214,175		175,367		140,372		135,880		133,025		103,025		83,025
Non-brokered deposits	$	1,668,351	$	1,665,789	$	1,698,975	$	1,708,428	$	1,483,139	$	1,513,738	$	1,525,735
Plus:
Sweep repurchase agreements		46,971		42,568		42,763		37,273		50,801		50,839		33,578
Core funding	$	1,715,322	$	1,708,357	$	1,741,738	$	1,745,701	$	1,533,940	$	1,564,577	$	1,559,313
Balance sheet amounts are as of period end unless otherwise noted.

SOUTHWEST BANCORP, INC.
UNAUDITED QUARTERLY SUPPLEMENTAL ANALYTICAL DATA
(Dollars in thousands) Table 8

			2016				2015
		Sep. 30		Jun. 30	Mar. 31		Dec. 31		Sep. 30		Jun. 30		Mar. 31
PERFORMANCE RATIOS
Return on average assets (annualized)		0.70%		0.91%		0.32%		0.78%		0.81%		0.85%		0.92%
Return on average common equity (annualized)		5.97		7.67		2.56		6.14		5.94		6.11		6.78
Return on average tangible common equity
(annualized)*		6.33		8.13		2.71		6.46		5.97		6.14		6.82
Net interest margin (annualized)		3.42		3.48		3.54		3.48		3.34		3.31		3.25
Total dividends declared to net income		35.14		28.35		84.66		26.22		27.53		27.45		25.19
Effective tax rate		34.45		34.70		35.19		35.96		35.84		34.51		37.49
Efficiency ratio		66.09		65.70		67.48		72.17		68.16		71.83		71.69
NONPERFORMING ASSETS
Nonaccrual loans	$	24,109	$	22,259	$	22,161	$	19,858	$	15,076	$	8,887	$	9,151
90 days past due and accruing		415		66		106		500		1		-		-
Total nonperforming loans		24,524		22,325		22,267		20,358		15,077		8,887		9,151
Other real estate		2,106		2,122		2,274		2,274		2,274		2,393		2,255
Total nonperforming assets	$	26,630	$	24,447	$	24,541	$	22,632	$	17,351	$	11,280	$	11,406
Potential problem loans	$	45,476	$	64,364	$	68,460	$	39,155	$	29,807	$	34,974	$	38,970
ASSET QUALITY RATIOS
Nonperforming assets to portfolio loans and
other real estate		1.42%		1.35%		1.38%		1.28%		1.12%		0.78%		0.80%
Nonperforming loans to portfolio loans		1.31		1.23		1.25		1.15		0.98		0.62		0.64
Allowance for loan losses to portfolio loans		1.52		1.48		1.53		1.47		1.73		1.82		1.91
Allowance for loan losses to
nonperforming loans		116.02		120.39		122.01		128.23		176.38		295.03		297.78
Net loan charge-offs to average portfolio
loans (annualized)		0.03		0.07		0.75		(0.02)		(0.09)		(0.03)		(0.20)
CAPITAL RATIOS
Average total shareholders' equity to
average assets		11.75%		11.93%		12.42%		12.77%		13.59%		13.87%		13.59%
Leverage ratio		13.07		13.18		13.45		14.41		15.84		16.12		15.75
Common equity tier 1 capital		11.95		12.22		12.13		13.21		14.57		15.30		15.51
Tier 1 capital to risk-weighted assets		13.95		14.28		14.14		15.53		16.95		17.84		18.10
Total capital to risk-weighted assets		15.21		15.53		15.39		16.79		18.21		19.09		19.36
Tangible common equity to tangible assets***		10.92		11.16		11.49		11.95		13.40		13.40		13.48
REGULATORY CAPITAL DATA
Common equity tier 1 capital	$	268,045	$	266,612	$	270,564	$	282,737	$	275,350	$	272,048	$	269,007
Tier I capital		313,045		311,612		315,326		332,468		320,350		317,048		314,007
Total capital		341,196		338,968		343,287		359,300		344,095		339,412		335,734
Total risk adjusted assets		2,243,895		2,182,051		2,230,326		2,140,344		1,889,892		1,777,618		1,734,401
Average total assets		2,395,991		2,363,834		2,344,259		2,307,421		2,022,972		1,966,577		1,993,446
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*This is a Non-GAAP based financial measure.
***Calculation of Tangible Common Equity to Tangible Assets (Non-GAAP Financial Measure)
Total shareholders' equity	$	283,820	$	282,360	$	285,661	$	296,098	$	277,344	$	273,681	$	271,444
Less goodwill and core deposit intangible		15,983		16,051		16,201		16,361		1,556		1,619		1,681
Tangible common equity	$	267,837	$	266,309	$	269,460	$	279,737	$	275,788	$	272,062	$	269,763
Total assets	$	2,468,042	$	2,402,262	$	2,360,819	$	2,357,022	$	2,059,899	$	2,031,581	$	2,003,079
Less goodwill and core deposit intangible		15,983		16,051		16,201		16,361		1,556		1,619		1,681
Tangible assets	$	2,452,059	$	2,386,211	$	2,344,618	$	2,340,661	$	2,058,343	$	2,029,962	$	2,001,398
Total shareholders' equity to total assets		11.50%		11.75%		12.10%		12.56%		13.46%		13.47%		13.55%
Tangible common equity to tangible assets		10.92%		11.16%		11.49%		11.95%		13.40%		13.40%		13.48%
Balance sheet amounts and ratios are as of period end unless otherwise noted.