Company: CMA
Filing Date: 2025-11-25
Form Type: DEFM14A
Source: 0001193125-25-297173
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Company: COMERICA INC
Filing Date: 2025-11-25
Form: DEFM14A
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by 
 Rule 14a-6(e)(2))                                             |

| ☒ | Definitive Proxy Statement |

| ☐ | Definitive Additional Materials |

| ☐ | Soliciting Material under §240.14a-12 |

Comerica Incorporated (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check all boxes that apply):

| ☒ | No fee required |

| ☐ | Fee paid previously with preliminary materials |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act 
 Rules 14a-6(i)(1) and 0-11                                               |

To the shareholders of Fifth Third Bancorp and the stockholders of Comerica Incorporated MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT On behalf of the boards of directors of Fifth Third Bancorp (“Fifth Third”) and Comerica Incorporated (“Comerica”), we are pleased to enclose this joint proxy statement/prospectus relating to the proposed acquisition of Comerica by Fifth Third. We are requesting that you take certain actions as shareholders or stockholders, as applicable, of Fifth Third and Comerica. The boards of directors of Fifth Third and Comerica have each unanimously approved a merger agreement (as defined below) pursuant to which Fifth Third will acquire Comerica. This acquisition brings together two long-tenuredbanking franchises to create one of the nation’s leading banks and is expected to be immediately accretive to shareholders and generate sustainable long-term growth. On October 5, 2025, Fifth Third and Comerica entered into an Agreement and Plan of Merger (as may be amended, modified or supplemented from time to time in accordance with its terms, the “merger agreement”) with Fifth Third Financial Corporation, a wholly owned subsidiary of Fifth Third (“Fifth Third Intermediary”) and Comerica Holdings Incorporated, a wholly owned subsidiary of Comerica (“Com