Company: WSBC
Filing Date: 2025-03-28
Form Type: 8-K/A
Source: 0001193125-25-067140
Chunk: 1

Company: WESBANCO INC
Filing Date: 2025-03-28
Form: 8-K/A
Chunk 1
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 emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2of the Securities Exchange Act of 1934 (§240.12b-2of this chapter). 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 13(a) of the Exchange Act.

EXPLANATORY NOTE As previously disclosed in the Current Report on Form 8-Kfiled by Wesbanco, Inc., a West Virginia corporation (“ Wesbanco”) on March 3, 2025 (the “ Initial Form 8-K”), on February 28, 2025, Wesbanco completed its previously announced merger (the “ Merger”) with Premier Financial Corp., an Ohio corporation (“ Premier Financial”), pursuant to the Agreement and Plan of Merger, dated as of July 25, 2024, by and among Wesbanco, Wesbanco Bank, Inc., a West Virginia corporation and a wholly-owned subsidiary of Wesbanco, Premier Financial and Premier Bank, an Ohio corporation and a wholly-owned subsidiary of Premier Financial. This Current Report on Form 8-K/Aamends the Initial Form 8-Kto include the historical financial statements of Premier Financial and the pro forma financial information required to be filed under Item 9.01 of Form 8-K.The disclosure included in the Initial Form 8-Kotherwise remains unchanged.

| Item 9.01 | Financial Statements and Exhibits. |

| (a) | Financial Statements of Businesses Acquired. |

The audited financial statements of Premier Financial as of December 31, 2024 and December 31, 2023 and for each of the years in the three-year period ended December 31, 2024 are filed as Exhibit 99.2 and incorporated herein by reference.

| (b) | Pro Forma Financial Information. |

The unaudited pro forma condensed combined financial statements of Wesbanco as of December 31, 2024 and for the year ended December 31, 2024 are filed as Exhibit 99.3 hereto and incorporated herein by reference. (d) Exhibits:

| 2.1  |     | Agreement and Plan of Merger, dated July 25, 2024, by and among Wesbanco, Inc., Wesbanco Bank