UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the Fiscal Year Ended December 31, 2019 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the transition period from _____ to _____ Commission File No. 001-34582 NORTHWEST BANCSHARES, INC. (Exact name of registrant as specified in its charter) Maryland 27-0950358 (State or other jurisdict ...

☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2019 OR ☐Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-34582 NORTHWEST BANCSHARES, INC. Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Exact name of registrant as specified in its charter) Maryland 27-0950358 (State or ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2019 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-34582 NORTHWEST BANCSHARES, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of in ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q x Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended March 31, 2019 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-34582 NORTHWEST BANCSHARES, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of i ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the Fiscal Year Ended December 31, 2018 OR o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the transition period from _____ to _____ Commission File No. 001-34582 NORTHWEST BANCSHARES, INC. (Exact name of registrant as specified in its charter) Maryland 27-0950358 (State or other jurisdict ...