Company: NWBI
Filing Date: 2025-01-27
Form Type: S-4
Source: 0001193125-25-012768
Chunk: 42

Company: Northwest Bancshares, Inc.
Filing Date: 2025-01-27
Form: S-4
Chunk 42
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, by visiting the website indicated on the accompanying proxy card and following the 
 instructions;                                                                                            |

| • |     | by filing a written notice of revocation with the Secretary of Penns Woods, at 300 Market Street, Williamsport, 
 Pennsylvania 17703-0967;                                                                                        |

| • |     | by executing and returning another proxy card with a later date; or |

| • |     | by attending the special meeting, giving notice of revocation to the corporate secretary and voting virtually at 
 the special meeting.                                                                                             |

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Your attendance at the special meeting will not, by itself, revoke your proxy.

If you hold your Penns Woods common stock in “street name” through a broker, bank or other nominee, you must provide
your broker, bank or nominee (the record holder of your shares of common stock) with instructions on how to vote your shares of common stock. Your broker, bank or other nominee will provide you with a proxy card and voting instructions. If
you have instructed your broker, bank or other nominee to vote your common stock, you must follow the directions received from your broker, bank or other nominee to change or revoke your vote.

If you have any questions or need assistance in voting your shares, please contact our proxy solicitor, Alliance Advisors, LLC, toll-free at
(833) 207-7606 or by email at PWOD@allianceadvisors.com.

Cost of Solicitation

The Penns Woods board of directors is soliciting your proxy, and Penns Woods will bear the cost of this solicitation of proxies. This includes
the charges and expenses of brokerage firms and others for forwarding solicitation material to beneficial owners of outstanding Penns Woods common stock. Alliance Advisors, LLC, a proxy solicitation firm, has been retained to assist Penns Woods in
the solicitation of proxies for the Penns Woods Special Meeting, and Penns Woods will pay Alliance Advisors, LLC $22,000, plus reimbursement of out-of-pocket expenses
and costs related to the collection of votes for these services. Proxies may be solicited by mail, personal interview, e-mail, telephone, or via the Internet by Alliance Advisors, LLC, or, without additional
compensation, by certain of Penns Woods’ directors, officers and employees.

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PROPOSALS SUBMITTED TO PENNS WOODS SHAREHOLDERS

Penns Woods Merger Proposal

As discussed
throughout this proxy statement/prospectus, Penns Woods is