UNITED STATES SECURITIES AND EXCHANGE COMMISSION For the Fiscal Year Ended December 31, 2021 Washington, D.C. 20549 OR FORM 10-K ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. ☒ Annual 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) (State or other jurisdiction of incorporation ...