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 Northwest Bancshares, Inc. Announces First Quarter 2024 Earnings and Quarterly Dividend 118th consecutive quarterly dividend of $0.20 per share declared. Columbus, Ohio — April 22, 2024 Northwest Bancshares, Inc., (the “Company”), (NasdaqGS: NWBI) announced ...