amendment
to INVESTOR LETTER AGREEMENT


May 18, 2015


Banner Corporation

10 South First Avenue


Walla Walla, Washington 99362


Attention: Mark J. Grescovich, Chief Executive Officer


Facsimile: (509) 526-8891


Ladies and Gentlemen:


Reference is made to that certain Agreement
and Plan of Merger, dated as of November 5, 2014, by and among SKBHC Holdings LLC (“Holdings”), Starbuck Bancshares,
Inc. (“Starbuck”) and Banner Corporation (“Banner”, and such agreement, as amended from time
to time, the “Merger Agreement”). Reference is further made to that certain investor letter agreement, dated
as of November 5, 2014 (the “Original Agreement”), by and among GS Capital Partners VI Fund, L.P., GS Capital
Partners VI GmBH & Co. KG, GS Capital Partners VI Offshore Fund, L.P. and GS Capital Partners VI Parallel, L.P. (collectively,
the “Subject Sellers”) and Banner. Capitalized terms used not otherwise defined herein have the same meaning
as in the Original Agreement.


Holdings, Starbuck and Banner have amended
the Merger Agreement to provide for the appointment to the Banner board of directors of five new directors at the Effective Time,
to be comprised of two representatives from the Major Silicon Members other than the Subject Sellers, and three independent directors
designated by Holdings’ board of directors.


The parties hereto desire to amend the Original
Agreement in certain respects, and for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged,
the parties agree as follows:


		1.	The right of the Subject Sellers to appoint a Board Representative to the boards of directors of Banner and Banner Bank under
Section 4 of the Original Agreement is hereby terminated, and such Section 4 shall hereafter have no further force or effect.



		2.	Each party hereto represents to the other parties hereto that it has the corporate or similar power and authority to execute
and deliver this amendment to the Original Agreement (this “Amendment”) and to carry out the terms and provisions
of this Amendment and the Original Agreement as amended hereby.



		3.	This Amendment shall be governed by and construed and interpreted in accordance with the Laws of the State of Washington, without
regard to any applicable conflicts of Law.



		4.	The parties hereto acknowledge and confirm that all references in the Original Agreement to “this Agreement” shall
be deemed to include the Original Agreement as amended by this Amendment.



		5.	Except as expressly amended hereby, the Original Agreement shall remain in full force and effect in accordance with the terms
thereof. This Amendment is limited specifically to the matters set forth above and does not constitute directly or by implication
an amendment or waiver of any other provisions of the Original Agreement or any default which may occur or may have occurred under
the Original Agreement. The Original Agreement as amended is hereby ratified and confirmed in all respects.



		6.	This Amendment may be executed in any number of counterparts (including facsimile and .pdf counterparts), each of which shall
be deemed to be an original, but all of which, taken together, shall constitute one and the same instrument.



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Very truly yours,





	GS CAPITAL PARTNERS VI FUND, L.P.	 	 	GS CAPITAL PARTNERS VI OFFSHORE FUND, L.P.
	 	 	 	 
	By:	GSCP VI Advisors, L.L.C.	 	By:	GSCP VI Offshore Advisors, L.L.C.
	Its:	General Partner	 	Its:	General Partner
	 	 	 	 	 
	By:	/s/ Gilbert H. Klemann	 	By:	/s/ Gilbert H. Klemann
	 	Name:	Gilbert H. Klemann	 	Name:	Gilbert H. Klemann
	 	Title:	Vice President	 	Title:	Vice President
	 	 	 	 	 	 
	 	 	 	 	 	 
	GS CAPITAL PARTNERS VI GmBH & Co. KG	 	 	GS CAPITAL PARTNERS VI PARALLEL, L.P.
	 	 	 	 
	By:	GSCP Advisors VI, L.L.C.	 	By:	GSCP Advisors VI, L.L.C.
	Its:	Managing Limited Partner	 	Its:	General Partner
	 	 	 	 	 
	By:	/s/ Gilbert H. Klemann	 	By:	/s/ Gilbert H. Klemann
	 	Name:	Gilbert H. Klemann	 	Name:	Gilbert H. Klemann
	 	Title:	Vice President	 	Title:	Vice President







 




    	 



    	 



    

 


Agreed and accepted:





	BANNER CORPORATION
	 
	By:	/s/
    Lloyd W. Baker
	Name:	Lloyd W. Baker
	Title:	Executive Vice President