Northwest Bancshares, Inc. Announces First Quarter 2024 Earnings and Quarterly Dividend 118 consecutive quarterly dividend of $0.20 per share declared. th EXHIBIT 99.1 PRESS RELEASE OF NORTHWEST BANCSHARES, INC. EARNINGS RELEASE FOR IMMEDIATE RELEASE Contact: Louis J. Torchio, President and Chief Executive Officer Douglas M. Schosser, Senior Executive Vice President, Chief Financial Officer (814) 726-2140 Columbus, Ohio — April 22, 2024 Northwest Bancshares, Inc., (the "Company"), (NasdaqGS: NWBI) announced ...

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, 2023 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 ...

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 September 30, 2023 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 ...

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, 2023 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) Maryland 27-0950358 (State or othe ...

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 March 31, 2023 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) Maryland 27-0950358 (State or oth ...

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, 2022 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 ...