Southwest Bancorp (OKSB) 8-K Southwest Bancorp, Inc. Reports Results for Third Quarter 2016

2016 Third Quarter Earnings Presentation October 19, 2016 NASDAQ: OKSB

Forward Looking Statements 2 We make forward-looking statements in this presentation that are subject to risks and uncertainties. We intend these statements 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 our future financial performance and the financial performance of our operating segments; •Expectations regarding regulatory actions; •Expectations regarding our ability to utilize tax loss benefits; •Expectations regarding our stock repurchase program; •Expectations regarding dividends; •Expectations regarding acquisitions and divestitures; •Assessments of loan quality, probable loan losses, and the amount and timing of loan payoffs; •Estimates of the value of assets held for sale or available for sale; and •Statements of our 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 our 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 the “Risk Factors” contained in Southwest’s reports to the Securities and Exchange Commission. We do not intend, or undertake no obligation, to update or revise any forward-looking statements contained in this presentation, whether as a result of differences in actual results, changes in assumptions, or changes in other factors affecting said statements, except as required by law. 

Net income was $4.3 million, or $0.23 per diluted share, compared to $4.1 million, or $0.22 per diluted share, in the third quarter of 2015. Total loans grew to $1.88 billion, or 12.9% annualized, and up 21.4% compared to the third quarter of 2015. We booked $197.9 million (funded $98.2 million) in new loan commitments during the third quarter of 2016 making this quarter our eleventh consecutive quarter of loan growth. The quarterly net interest margin was 3.42% at September 30, 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 for the third quarter, an increase of 3.9% from $8.0 million in the second quarter of 2016 and an increase of 29.1% from $6.5 million in the third quarter of 2015. Efficiency ratio, adjusted for restructuring charges, improved to 63.8% for the third quarter of 2016, from 65.7% for the second quarter of 2016 and 68.2% for the third quarter of 2015. Incurred $0.4 million in restructuring charges for branch closures and personnel reductions. Third Quarter 2016 Highlights 3

Third Quarter 2016 Highlights-cont. Our Board approved a cash dividend of $0.08 per share payable on November 15, 2016 to shareholders of record on November 1, 2016. Continue to repurchase shares under our Board of Directors authorized share repurchase program. Our capital ratios all remain strong and well above the criteria for regulatory classification as “well-capitalized”.  4

Credit Quality Highlights Third Quarter 2016 Potential problem loans improved from $64.4 million to $45.5 million, or 2.4% of total portfolio loans, a second consecutive quarter of improvement. Nonperforming loans stood at $24.5 million at September 30, 2016, an increase of $2.2 million from the end of the second quarter. We incurred net charge-offs of $137,000 centered in commercial real estate loans. A provision for loan losses in the amount of $1.7 million was made, changing our reserve position to 1.52% of portfolio loans. 5

Energy Highlights Third Quarter 2016 Total direct energy exposure at 9/30/16 included $83.2 million in commitments and $53.4 million in funded debt, down slightly from $89.5 million and $56.7 million at 6/30/16, respectively. Energy exposure represents 2.8% of our total funded credit portfolio down from 3.1% in the second quarter. The portfolio is advanced 59% to reserve-based credits and 41% to services, similar to prior quarters. Including the specific allocation, the ALLL for energy credits is 6%. Ten reserve-based borrowers with commitments in excess of $1.0 million. Total funded reserve based credits were $31.7 million or 1.7% of our total portfolio. One reserve-based credit of $5.3 million, included in criticized, remains at nonperforming with a $2.7 million allocated reserve. No participations purchased in our reserve-based portfolio. 6

Energy Highlights (continued) The services portfolio has $21.6 million funded with four credits having commitments in excess of $1 million. 79.6% of funded service portfolio is comprised of three credits, all of which are participations purchased from larger banks. One services credit in the amount of $3.3 million was downgraded from special mention to substandard during the SNC review in August. We have 12 direct energy credits representing $30.9 million in commitments and $27.8 million in funded balances that are criticized. This equates to 37.1% of commitments and 52% of funded balances. We continue to stress the portfolio at various levels including $35 oil and $2.15 gas flat as worst case. Could reflect potential need of an additional approximately $4 to $5 million in reserves over time under this scenario. Approved no new energy credits in the third quarter of 2016. 7

Financial Highlights 8 (1) Intangible assets defined as goodwill for purposes of these calculations. (2)NPLs defined as Non-Accrual loans + Loans 90+ Days Past Due, NPAs defined as NPLs + OREO. (3)This is a non-GAAP based financial measure. See Appendix for reconciliation to the most directly comparable GAAP based measure. 2013 FY2014 FY2015 FY2015 FQ32015 FQ42016 FQ12016 FQ22016 FQ3($ in thousands except per share data)12/31/1312/31/1412/31/159/30/1512/31/153/31/166/30/169/30/16Balance SheetTotal Assets1,981,423 1,942,034 2,357,022 2,059,899 2,357,022 2,360,819 2,402,262 2,468,042 Total Gross Loans1,270,903 1,399,991 1,779,428 1,548,094 1,779,428 1,781,884 1,821,377 1,880,112 Total Deposits1,584,086 1,533,999 1,884,105 1,626,250 1,884,105 1,895,248 1,902,865 1,947,924 Total Equity259,187 270,786 296,098 277,344 296,098 285,661 282,360 283,820 Profitability (%)Net Income ($000)17,435 21,030 17,407 4,122 4,589 1,869 5,412 4,255 ROAA0.86 1.09 0.84 0.81 0.78 0.32 0.91 0.70 ROAE6.90 7.82 6.23 5.94 6.14 2.56 7.67 5.97 Net Interest Margin3.19 3.45 3.35 3.34 3.48 3.54 3.48 3.42 Efficiency Ratio73.38 72.51 70.98 68.16 72.17 67.48 65.70 66.09 Balance Sheet Ratios / Capital (%)Loans / Deposits80.23 91.26 94.44 95.19 94.44 94.02 95.72 96.52 Tangible Common Equity / Tang Assets(1)(3)12.94 13.87 11.95 13.40 11.95 11.49 11.16 10.92 Common Equity Tier 1 Capital RatioNANA13.21 14.57 13.21 12.13 12.22 11.95 Tier 1 Risk Based Capital Ratio20.28 19.70 15.53 16.95 15.53 14.14 14.28 13.95 Total Risk Based Capital Ratio21.59 20.96 16.79 18.21 16.79 15.39 15.53 15.21 Tier 1 Leverage Ratio14.86 16.45 14.41 15.84 14.41 13.45 13.18 13.07 Asset Quality (%)(2)NPLs / Portfolio Loans1.57 0.67 1.15 0.98 1.15 1.25 1.23 1.31 NCOs / Avg Portfolio Loans0.22 0.12 (0.08) (0.09) (0.02) 0.74 0.07 0.03 Reserves / Portfolio Loans2.89 2.03 1.47 1.73 1.47 1.53 1.48 1.52 Reserves / NPLs184.50 302.26 128.23 176.38 128.23 122.01 120.39 116.02 Per Share DataTangible Book Value Per Share12.97 14.02 13.98 14.49 13.

98 13.97 14.20 14.33 Earnings Per Diluted Share0.89 1.07 0.90 0.22 0.23 0.10 0.28 0.23 Earnings Results 9 Earnings Summary (1)This is a non-GAAP based financial measure. See Appendix for reconciliation to the most directly comparable GAAP based measure.  Q3 '16 vs. Q2'16 ($ in thousands except per share data)9/30/166/30/169/30/15% ChangeNet interest income19,805$ 19,695$ 16,496$ 0.6%Provision for loan losses1,713 10 23 17030.0%Noninterest income4,555 3,871 4,029 17.7%Nontinterest expense16,156 15,268 14,077 5.8%Income before taxes6,491 8,288 6,425 -21.7%Taxes on income2,236 2,876 2,303 -22.3%Net income4,255$ 5,412$ 4,122$ -21.4%Pre-tax, pre-provision (1)8,350$ 8,035$ 6,466$ 3.9%Diluted earnings per share0.23$ 0.28$ 0.22$ Three Months Ended

Owner Occupied CRE $321.3 17% Non-Owner Occupied CRE $572.5 30% Residential Real Estate $216.1 12% Consumer $19.6 1% Construction & Development $184.2 10% Commercial & Industrial $566.4 30% Loan Portfolio 10  Dollars in millions unless otherwise noted.  Loans by Type Loans by Segment Owner Occupied CRE $293.4 19% Non-Owner Occupied CRE $575.9 37% Residential Real Estate $108.7 7% Consumer $20.2 1% Construction & Development $126.4 8% Commercial & Industrial $423.4 28% 9/30/2016 $1.88 billion 9/30/2015 $1.55 billion Kansas $156.7 8% Oklahoma $1,052.8 56% Colorado $64.9 4% Texas $605.7 32% Kansas $152.8 10% Oklahoma $832.3 54% Texas $563.0 36%

Owner Occupied CRE $6.7 28% Non-Owner Occupied CRE $0.9 4% Residential Real Estate $3.0 12% Consumer $0.1 0% Construction & Development $1.1 4% Commercial & Industrial $2.2 9% Energy Commercial & Industrial $5.3 22% Healthcare Commercial & Industrial $5.2 21% Nonperforming Loans 11 Dollars in millions unless otherwise noted. Nonperforming loans include non-accruals and 90 days past due loans.  By Type By Geographic Location Owner Occupied CRE $1.3 9% Non-Owner Occupied CRE $0.5 3% Residential Real Estate $1.0 7% Consumer $0.1 1% Construction & Development $0.4 3% Commercial & Industrial $6.9 45% Healthcare Commercial & Industrial $4.9 32% 9/30/2016 $24.5 million 9/30/2015 $15.1 million Kansas $0.4 2% Oklahoma $12.1 49% Arizona $5.0 20% Texas $6.8 28% Other $0.2 1% Kansas $1.2 8% Oklahoma $2.8 19% Arizona $4.7 31% Texas $6.4 42%

Loan Loss Reserve to NPL+PPL 12 30.65% 32.38% 32.87% 38.92% 65.48% 56.63% 59.78% 59.25% 43.90% 29.94% 31.00% 40.65% 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16Nonperforming loans include non-accruals and 90 days past due loans. PPL is defined as potential problem loans. 

Credit Risk Profile 13 Nonperforming assets defined as nonaccrual loans, loans past due 90 days or more and still accruing, and other real estate owned.

Strong Core Deposit Franchise 14 $1.9 billion Total Deposits (9/30/16) Deposits by Type Cost of Deposits 0.40% 0.36% 0.34% 0.34% 0.32% 0.31% 0.32% 0.33% 0.37% 0.40% 0.43% 0.45% 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16Non-interest Bearing Demand$550 28%Interest Bearing Demand$147 7%Money market Accounts$577 30%Savings Accounts$55 3%Time Deposits $100,000 or More$348 18%Other Time Deposits$272 14%Dollars in millions.

NIM/Cost of Funds 15 0.40% 0.36% 0.34% 0.34% 0.32% 0.31% 0.32% 0.33% 0.37% 0.40% 0.43% 0.45% 3.42% 3.33% 3.50% 3.44% 3.52% 3.25% 3.31% 3.34% 3.48% 3.54% 3.48% 3.42% 0.0%0.5%1.0%1.5%2.0%2.5%3.0%3.5%4.0%4.5%5.0% $- $5,000 $10,000 $15,000 $20,000 $25,000Q4 '13Q1 '14Q2'14Q3 '14Q4 '14Q1 '15Q2 '15Q3 '15Q4 '15Q1 '16Q2 '16Q3 '16($000s) Net Interest IncomeCost of DepositsNet Interest Margin

Noninterest Income 16 $3,068 $3,025 $8,246 $3,084 $4,576 $2,840 $3,409 $4,029 $4,179 $3,415 $3,871 $4,555 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16Service Charges and FeesGain on Sales of LoansGain on Investment SecuritiesOtherDollars in thousands.

$15,065 $14,107 $15,332 $13,358 $14,115 $13,082 $13,982 $14,077 $17,099 $15,996 $15,268 $16,156 12/31/133/3/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16Salaries and Employee BenefitsOccupancyGeneral and AdministrativeOtherNoninterest Expense 17 Dollars in thousands.

Strong Capital Position 18 Tier 1 Leverage Ratio Common Equity Tier 1 Note: 3/31/15 calculated consistent with Basel III; previous figures consistent with General Risk-based Rules. Tier 1 Risk-based Capital Ratio Total Risk-Based Capital Ratio 6.5% Well Capitalized 8.0% Well Capitalized 10.0% Well Capitalized 5.0% Well Capitalized 15.0% 14.9% 16.5% 15.8% 16.1% 15.8% 14.4% 13.5% 13.2% 13.1% 0.0%5.0%10.0%15.0%20.0%25.0%12/31/1212/31/1312/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/1621.6% 21.6% 21.0% 19.4% 19.1% 18.2% 16.6% 15.4% 15.5% 15.2% 0.0%5.0%10.0%15.0%20.0%25.0%12/31/1212/31/1312/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/1620.3% 20.3% 19.7% 18.1% 17.8% 17.0% 15.3% 14.1% 14.2% 14.0% 0.0%5.0%10.0%15.0%20.0%25.0%12/31/1212/31/1312/31/143/31/156/30/159/30/1512/31/153/31/166/30/1

69/30/1615.2% 17.2% 16.9% 15.5% 15.3% 14.6% 13.2% 12.1% 12.2% 12.0% 0.0%5.0%10.0%15.0%20.0%25.0%12/31/1212/31/1312/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/162016 Priorities Maintain strong credit quality along with conservative balance sheet and risk management. Continue appropriate growth in the commercial banking sector. Grow deposit base commensurate with loan growth. Focus on fee based income growth in mortgage, consumer and treasury. Assess, manage and add talent where available and appropriate throughout the organization. Drive growth in the healthcare banking segment. Deploy capital in a manner that grows the organization and enhances shareholder value. Manage expenses to drive operating efficiency improvements. Ensure that the repurchase and dividend programs are providing the best shareholder returns.  19

ADDITIONAL FINANCIAL INFORMATION 20

Quarterly Net Income 21  $6.8  $3.7  $6.2  $5.3  $5.9  $4.5 $4.2  $4.1  $4.6  $1.9  $5.4  $4.3 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16Dollars in millions.

Quarterly Pre-Tax, Pre-Provision Income 22  $4.1  $5.0  $5.1 (1)  $5.2 $5.8 (2)  $5.1  $5.3  $6.5  $6.4  $7.5  $8.0  $8.4 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16Dollars in millions. (1) Excludes gain on sale of branches. (2) Excludes gain on sale of private equity security.

Quarterly Net Interest Margin 23 3.42% 3.33% 3.50% 3.44% 3.52% 3.25% 3.31% 3.34% 3.48% 3.54% 3.48% 3.42% 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16

Total Loans by Segment 24  $705.2  $777.4  $798.1  $800.2  $793.3 $814.9  $810.4  $832.3  $1,009.7  $1,012.4  $1,038.9  $1,052.8  $366.7 $372.0  $408.4  $424.6  $460.7  $478.0  $493.0  $563.0  $580.5 $560.4  $577.3  $605.7  $199.0  $170.7  $145.2  $142.5  $146.0 $145.3  $146.0  $152.8  $150.5  $161.0  $158.1  $156.7  $38.8 $48.1  $47.1  $64.9 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16OklahomaTexasKansasColoradoDollars in millions.

Potential Problem Loans by Segment 25  $29.0  $29.2  $23.9 $23.9  $25.0  $26.7  $23.2  $23.6  $30.2  $43.4  $43.1 $21.0  $65.1  $58.4  $57.0  $38.6  $6.3  $9.5  $9.2 $4.1  $4.2  $18.8  $17.7  $21.0  $5.7  $4.2  $3.2 $1.9  $2.8  $2.7  $2.6  $2.1  $2.0  $3.6  $2.7 $2.7  $2.8  $2.7  $0.8  $0.7 12/31/133/31/146/30/149/30/1412/31/143/3/156/30/159/30/1512/31/153/31/166/30/169/30/16OklahomaTexasKansasColoradoDollars in millions.

Provision for Loan Loss 26  $(6.50) $(0.99)  $(0.36)  $(2.90)  $(2.39)  $(1.89)  $(1.14)  $0.02  $(0.57) $4.38  $0.01  $1.71 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16Dollars in millions.

Loan Loss Reserve to Total Portfolio Loans 27 2.89% 2.66% 2.46% 2.27% 2.03% 1.91% 1.82% 1.73% 1.47% 1.53% 1.48% 1.52% 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16

Loan Loss Reserve to Nonperforming Loans 28 184.50% 217.13% 200.77% 205.29% 302.26% 297.78% 295.03% 176.38% 128.23% 122.01% 120.39% 116.02% 12/31/133/31/146/30/149/30/1412/31/143/31/156/30/159/30/1512/31/153/31/166/30/169/30/16

APPENDIX 29

The subsequent tables present non-GAAP reconciliations of the following calculations:  –Tangible Common Equity (TCE) to Tangible Assets (TA) ratio –Tangible Book Value per Share –Pre-tax, Pre-provision Income  30

TCA to TA and Tangible Book Value Per Share 31 Dollars in thousands, except per share amounts. 12/31/20133/31/20146/30/20149/30/201412/31/20143/31/20156/30/20159/30/201512/31/20153/31/20166/30/20169/30/2016Net Income6,832$ 3,691$ 6,152$ 5,288$ 5,899$ 4,535$ 4,161$ 4,122$ 4,589$ 1,869$ 5,412$ 4,255$ Taxes on income4,310 2,214 3,691 3,172 3,540 2,720 2,193 2,303 2,577 1,015 2,876 2,236 Provision(6,502)(986)(355)(2,897)(2,386)(1,887)(1,136)23(566)4,375101,713Provions for unfunded(502)8512(327)(150)(225)11518(163)215(263)146Pre-tax, Pre-provision Income4,138$ 5,004$ 9,500$ 5,236$ 6,903$ 5,143$ 5,333$ 6,466$ 6,437$ 7,474$ 8,035$ 8,350$ Gain on sale of bank branches4,378$ Gain on sale of private equity security1,120$ Adjusted Pre-tax, Pre-provision Income5,122$ 5,783$ Pre-tax, Pre-provision Income12/31/201312/31/201412/31/20159/30/201512/31/20153/31/20166/30/20169/30/2016Total Equity259,187$ 270,786$ 296,098$ 277,344$ 296,098$ 285,661$ 282,360$ 283,820$ Less Goodwill & Core Deposits3,272 1,744 16,361 1,556 16,361 16,201 16,051 15,983 TCE255,915$ 269,042$ 279,737$ 275,788$ 279,737$ 269,460$ 266,309$ 267,837$ Total Assets1,981,423$ 1,942,034$ 2,357,022$ 2,059,899$ 2,357,022$ 2,360,819$ 2,402,262$ 2,468,042$ Less Goodwill & Core Deposits3,272 1,744 16,361 1,556 16,361 16,201 16,051 15,983 TA1,978,151$ 1,940,290$ 2,340,661$ 2,058,343$ 2,340,661$ 2,344,618$ 2,386,211$ 2,452,059$ Common Equity to Assets13.08%13.94%12.56%13.46%12.56%12.10%11.75%11.50%TCE to TA12.94%13.87%11.95%13.40%11.95%11.49%11.16%10.92%Shares outstanding19,732,926 19,193,059 20,006,802 19,032,719 20,006,802 19,285,045 18,750,783 18,685,385 Book Value per Common Share13.13$ 14.11$ 14.80$ 14.57$ 14.80$ 14.81$ 15.06$ 15.19$ Tangible BV per Share12.97$ 14.02$ 13.98$ 14.49$ 13.98$ 13.97$ 14.20$ 14.33$

2016 Third Quarter Earnings Presentation October 19, 2016 NASDAQ: OKSB