Company: NWBI
Filing Date: 2025-02-20
Form Type: S-4/A
Source: 0001193125-25-030716
Chunk: 1

Company: Northwest Bancshares, Inc.
Filing Date: 2025-02-20
Form: S-4/A
Chunk 1
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 the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-acceleratedfiler or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2of the Exchange Act. (Check one):

| Large accelerated filer |     | ☒                                             |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☐ (do not check if smaller reporting company) |     | Smaller reporting company |     | ☐ |
|                         |     |                                               |     | Emerging growth company   |     | ☐ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐ If applicable, place an “x” in the box to designate the appropriate rule provision relied upon in conducting this transaction:

| ☐ | Exchange Act Rule 13e-4(i)(Cross-Border Tender Offer) |

| ☐ | Exchange Act Rule 14d-1(d)(Cross-Border Third Party Tender Offer) |

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to Section 8(a), may determine.

THE INFORMATION IN THIS PROXY STATEMENT/PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. A REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE SECURITIES AND EXCHANGE COMMISSION. WE MAY NOT ISSUE THESE SECURITIES UNTIL THE REGISTRATION STATEMENT IS EFFECTIVE. THIS PROXY STATEMENT/PROSPECTUS IS NOT AN OFFER TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.

PRELIMINARY PROXY STATEMENT/