April 28, 2005 -- Southwest Bancorp Inc., the parent company of Stillwater National Bank and Trust and SNB Bank of Wichita, said Thursday that on June 24, it will redeem all of the 9.3 percent cumulative trust preferred securities issued by its SBI Capital Trust unit. The securities will be redeemed at a price equal to the $25 liquidation amount, plus accrued and unpaid distributions to the redemption date. The securities were originally issued in June 1997, and are listed on the Nasdaq under the symbol "OKSBO".

QUANTUMONLINE.COM SECURITY DESCRIPTION:  SBI Capital Trust, 9.30% Cumulative Trust Preferred Securities, liquidation amount $25 per share, guaranteed by Southwest Bank Inc. (NNM: OKSB), redeemable at the issuer's option on or after 7/31/2002 at $25 per share plus accrued and unpaid dividends, maturing 7/31/2027, distributions of 9.30% ($2.325) per annum are paid quarterly on 1/31, 4/30, 7/31 & 10/31 to holders of record on the 15th day of the month is which the payment is due. The company has the right, at any time, to defer dividend payments for up to 20 consecutive quarters (but not beyond the maturity date). The trust's assets consist of the 9.30% Subordinated Deferrable Interest Debentures due 7/31/2027 which were purchased from the company using the funds generated from the sale of the trust preferred securities. See the IPO prospectus for further information on the trust preferred securities by clicking on the ‘Link to IPO Prospectus’ provided below.

Stock Exchange	Cpn Rate Ann Amt	LiqPref CallPrice	Call Date Matur Date	Moodys/S&P Dated	Distribution Dates	15% Tax Rate
NNM Chart	9.30% $2.325	$25.00 $25.00	Called for 6/24/2005 7/31/2027	NF NF 11/09/2004	1/31, 4/30, 7/31 & 10/31 Click for MW ExDiv Date Click for Yahoo ExDiv Date	No

Company's Online Information Links

HOME PAGE:     http://www.oksb.com/
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Company's Online News Releases	Go to News Releases
Online Company Profile	Go to Online Profile

Company's Online SEC EDGAR Filings

Company's SEC EDGAR Filings

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Company's Email Address Links

Email Address	investorservices@banksnb.com
Email Contact Form on Website	Go to Email Form

Address and Phone Numbers

Address:   608 South Main Street, Stillwater, OK 74074
Main Phone Number	405-742-1800
Fax Number	405-742-1805
Investor Contact (CFO)   Joe Shockley	405-372-2230
Toll Free Phone Number	Unknown

CEO - Mark W. Funke

CFO - Joe T. Shockley, Jr.