UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC  20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 3, 2013  (October 3, 2013)

SOUTHWEST BANCORP, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (405) 742-1800

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[   ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[   ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[   ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[   ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01Other Events

On October 3, 2013, Southwest Bancorp, Inc. issued a press release announcing that the merger of its wholly-owned subsidiary Bank of Kansas with and into its other wholly-owned subsidiary, Stillwater National Bank and Trust Company, has been approved, the merger will be made effective as of the close of business November 15, 2013, and the consolidated bank will be renamed and will do business in all markets under the new name Bank SNB.  A copy of the press release is attached as Exhibit 99.1.

Item 9.01Financial Statements and Exhibits

(d)Exhibit

99.1:  Press Release dated October 3, 2013

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

October 3, 2013