Company: WTFCN
Filing Date: 2025-05-21
Form Type: 8-A12B
Source: 0001104659-25-051541
Chunk: 2

Company: WINTRUST FINANCIAL CORP
Filing Date: 2025-05-21
Form: 8-A12B
Chunk 2
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 of State of the State of Illinois designating the preferences, limitations, voting powers and relative rights of the Series E Preferred Stock (incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on May 8, 2020).                                                        |
| 3.4     |     | Certificate of Designations of the Company filed on May 9, 2025 with the Secretary of State of the State of Illinois designating the preferences, limitations, voting powers and relative rights of the Series F Preferred Stock (incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on May 14, 2025).                                                       |
| 3.5     |     | Amended and Restated By-laws of the Company, as amended (incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K, filed with the Securities and Exchange Commission on August 1, 2024)                                                                                                                                                                                                                              |
| 4.1     |     | Form of Deposit Agreement, by and among the Company, U.S. Bank Trust Company, National Association, as registrar and as depositary, and the holders from time to time of the depositary receipts described therein.                                                                                                                                                                                                                              |
| 4.2     |     | Form of depositary receipt representing the Depositary Shares (included as Exhibit A to Exhibit 4.1 hereto).                                                                                                                                                                                                                                                                                                                                     |

<div align='center'>SIGNATURES</div>

Pursuant to the requirements of Section 12 of
the Securities Exchange Act of 1934, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned,
thereto duly authorized.

| Date: May 21, 2025 | WINTRUST FINANCIAL CORPORATION 
 By:                            | /s/ David A. Dykstra                             |
|:-------------------|:-------------------------------|:-------------------------------------------------|
|                    |                                | Name: David A. Dykstra                           
 Title: Vice Chairman and Chief Operating Officer |