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.

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

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

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

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

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company [ ]

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. [ ]

Item 2.02 Results of Operations and Financial Condition.

To the extent the information in Item 7.01 or Exhibit 99.1 relates to a completed fiscal period, such information is incorporated into this item 2.02.

Item 7.01 Regulation FD Disclosure.

On January 4, 2018, Banner Corporation (the "Company") issued a press release discussing the estimated impact on the Company of certain aspects of the tax reform legislation enacted on December 22, 2017, the Company's balance sheet restructuring and that on December 31, 2017 its assets were less than $10 billion. A copy of the Company's press release is attached as Exhibit 99.1 to this Current Report on Form 8-K.

Information contained herein, including Exhibit 99.1, shall not be deemed filed for the purposes of the Securities Exchange Act of 1934, nor shall such information and Exhibit be deemed incorporated by reference in any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such a filing.

The following exhibit is being furnished herewith and this list shall constitute the exhibit index:

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.

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