Company: FITBI
Filing Date: 2025-12-11
Form Type: 425
Source: 0000035527-25-000227
Chunk: 0

Company: FIFTH THIRD BANCORP
Filing Date: 2025-12-11
Form: 425
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, DC 20549

#### FORM 8-K

### CURRENT REPORT

#### PURSUANT TO SECTION 13 OR 15(D)

#### OF THE SECURITIES EXCHANGE ACT OF 1934
<div align='center'>Date of report (Date of earliest event reported): December 9, 2025</div>

#### Fifth Third Bancorp
<div align='center'>(Exact name of registrant as specified in its charter)</div>

| Ohio                         |     | 001-33653   |     | 31-0854434         |
| (State or other jurisdiction 
 of incorporation)            |     | -Commission 
 File Number |     | -IRS Employer      
 Identification No. |

| Fifth Third Center                       |     |                          |   |     |            |     |   |     |      |     |           |
|                                          |     | 38 Fountain Square Plaza | , |     | Cincinnati |     | , |     | Ohio |     |     45263 |
| (Address of Principal Executive Offices) |     |                          |   |     |            |     |   |     |      |     | -Zip Code |

<div align='center'>(800) 972-3030

(Registrant's telephone number, including area code)</div>

#### Not Applicable
<div align='center'>(Former name or former address, if changed since last report)</div>

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below)

☒ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

| Securities registered pursuant to Section 12(b) of the Act:                                                                                                 |     |           |     |                       |     |     |        |     |                  |
| Title of each class                                                                                                                                         |     | Trading   
 Symbol(s