Company: WTFCN
Filing Date: 2025-05-21
Form Type: 8-A12B
Source: 0001104659-25-051541
Chunk: 0

Company: WINTRUST FINANCIAL CORP
Filing Date: 2025-05-21
Form: 8-A12B
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
PURSUANT TO SECTION 12(b) OR 12(g) OF THE
SECURITIES EXCHANGE ACT OF 1934

WINTRUST FINANCIAL CORPORATION

(Exact name of registrant as specified in its charter)</div>

| Illinois                                 |     |                          36-3873352 |
| (State or other jurisdiction of          
 incorporation or organization)           |     | -I.R.S. Employer Identification No. |
| 9700 W. Higgins Road, Suite 800          |     |                                     |
| Rosemont, Illinois                       |     |                               60018 |
| (Address of principal executive offices) |     |                           -Zip Code |

Securities to be registered pursuant to Section 12(b) of the Act:

| Title of each class                                                                                                                            
 to be so registered                                                                                                                            |     | Name of each exchange on which 
 each class is to be registered |
| Depositary Shares, Each Representing a 1/1,000th                                                                                               
 Interest in a Share of 7.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series F, no par value, with a liquidation preference 
 of $25,000 per share                                                                                                                           |     | The Nasdaq Stock               
 Market LLC                     |

If this form relates to the registration of a class of securities pursuant
to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), check the following box. x

If this form relates to the registration of a class of securities pursuant
to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or (e), check the following box. ¨

If this form relates to the registration of a class of securities concurrently
with a Regulation A offering, check the following box. ¨

<div align='center'>Securities Act registration statement or Regulation A offering statement file number to which this form relates:

333-271788

Securities to be registered pursuant to Section 12(g) of the Act:

None.</div>

Item 1. Description of Registrant’s Securities to be Registered.

The class of securities to be registered hereby are depositary shares
(the “Depositary Shares”), each representing a 1/1,