Northwest Bancshares (NWBI) 10-Q 2018 Q3 Quarterly report

Exhibit 32.1

Certification by the Chief Executive Officer and Chief Financial Officer

The undersigned officers of Northwest Bancshares, Inc. (the “Company”) hereby certify that, to the best of their knowledge:

1.The Company’s quarterly report on Form 10-Q for the period ended September 30, 2018 (the “Report”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

November 8, 2018	/s/ Ronald J. Seiffert
Date	Ronald J. Seiffert
	President and Chief Executive Officer
November 8, 2018	/s/ William W. Harvey, Jr.
Date	William W. Harvey, Jr.
	Chief Financial Officer

The purpose of this statement is solely to comply with Title 18, Chapter 63, Section 1350 of the United States Code, as amended by Section 906 of the Sarbanes-Oxley Act of 2002.

A signed original of this written statement required by Section 906 has been provided to Northwest Bancshares, Inc. and will be retained by Northwest Bancshares, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.