FMER Firstmerit Corp. (MM)

1985 FirstMerit Corporation Stock Plan (CV)

1993 FirstMerit Corporation Stock Plan (CV)

FirstMerit Corporation and Affiliates Employees’ Salary Savings Retirement Plan

Security First 1987 Stock Option and Incentive Plan

Security First 1996 Stock Option and Incentive Plan

First Kent Financial Corporation 1994 Stock Option Plan

Signal Amended and Restated Stock Option and Incentive Plan

Signal Non-Employee Director Stock Option Plan

Signal 1997 Omnibus Incentive Plan

First Shenango Bancorp, Inc. 1993 Stock Option Plan

Summit Bancorp 1989 Stock Incentive Plan

FirstMerit Corporation 1999 Stock Plan

FirstMerit Corporation 1997 Stock Plan

Amended and Restated FirstMerit Corporation Executive Deferred Compensation Plan

Amended and Restated FirstMerit Corporation Director Deferred Compensation Plan

FirstMerit Corporation Amended and Restated 2002 Stock Plan

FirstMerit Corporation 2006 Equity Plan

FirstMerit Corporation 2011 Equity Incentive Plan

Citizens Republic Bancorp 401(k) Plan

Citizens Republic Bancorp, Inc. Stock Compensation Plan

Republic Bancorp, Inc. 1998 Stock Option Plan

(Full title of the plan)

Richard A. Cheap, Esq.

General Counsel and Secretary

Huntington Bancshares Incorporated

41 South High Street

Columbus, Ohio 43287

(614) 480-4647

(Name, address, including zip code, and telephone number,

including area code, of agent for service)

Copy to:

Edward D. Herlihy, Esq.

Nicholas G. Demmo, Esq.

Mark F. Veblen, Esq.

Wachtell, Lipton, Rosen & Katz

51 West 52nd Street

New York, New York 10019

(212) 403-1000

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

This Post-Effective Amendment relates to the following Registration Statements on Form S-8 (collectively, the “Registration Statements”) of FirstMerit Corporation (the “Registrant”):

Pursuant to that certain Agreement and Plan of Merger, dated as of January 25, 2016, by and among Huntington Bancshares Incorporated (“Huntington”), the Registrant, and West Subsidiary Corporation (“Merger Sub”), an Ohio corporation and a wholly owned subsidiary of Huntington, on August 16, 2016, Merger Sub merged with and into the Registrant, with the Registrant continuing as a wholly owned subsidiary of Huntington (the “First Step Merger”), and immediately thereafter, the Registrant merged with and into Huntington, with Huntington continuing as the surviving entity (the “Second Step Merger,” and together with the First Step Merger, the “Mergers”).

In connection with the consummation of the Mergers, the Registrant terminates the Registration Statements and deregisters the remaining securities registered but unsold under the Registration Statements, if any, in accordance with an undertaking made by the Registrant in the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities that had been registered for issuance that remain unsold at the termination of the offering. The Registration Statements are hereby amended, as appropriate, to reflect the deregistration of such securities.