# EDGAR Filing Document

**Accession Number:** 0001015328
**File Stem:** 0001104659-26-057143
**Filing Date:** 2026-5
**Character Count:** 244429
**Document Hash:** 06170e9d23c14f8406294addff59738e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-057143.hdr.sgml**: 20260507

**ACCESSION NUMBER**: 0001104659-26-057143

**CONFORMED SUBMISSION TYPE**: S-3ASR

**PUBLIC DOCUMENT COUNT**: 17

**FILED AS OF DATE**: 20260507

**DATE AS OF CHANGE**: 20260507

**EFFECTIVENESS DATE**: 20260507

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WINTRUST FINANCIAL CORP
- **CENTRAL INDEX KEY:** 0001015328
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 363873352
- **STATE OF INCORPORATION:** IL
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-3ASR
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-295636
- **FILM NUMBER:** 26953482

**BUSINESS ADDRESS:**
- **STREET 1:** 9700 WEST HIGGINS ROAD, 8TH FLOOR
- **CITY:** ROSEMONT
- **STATE:** IL
- **ZIP:** 60018
- **BUSINESS PHONE:** 8479399000

**MAIL ADDRESS:**
- **STREET 1:** 9700 WEST HIGGINS ROAD, 8TH FLOOR
- **CITY:** ROSEMONT
- **STATE:** IL
- **ZIP:** 60018

[**TABLE OF CONTENTS**](#TOC)

#### As filed with the Securities and Exchange Commission on May 7, 2026

#### Registration No. 333-

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### Form S-3

#### REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

### Wintrust Financial Corporation
(Exact name of registrant as specified in its charter)

---

| | |
|:---|:---|
| **Illinois** <br> (State or other jurisdiction of <br> incorporation or organization)  | **36-3873352** <br> (IRS Employer <br> Identification Number)  |

---

#### 9700 W. Higgins Road, Suite 800 Rosemont, Illinois 60018 (847) 939-9000
(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)

#### Kathleen M. Boege Executive Vice President, Chief Legal Officer and Corporate Secretary 9700 W. Higgins Road, Suite 800 Rosemont, Illinois 60018 (847) 939-9008
(Name, address, including zip code, and telephone number, including area code, of agent for service)

#### Copy to:

#### Pran Jha Michael P. Heinz Sidley Austin LLP One South Dearborn Street Chicago, Illinois 60603 (312) 853-7000
**Approximate date of commencement of proposed sale to the public:** From time to time after this Registration Statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☒

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer ☒ Accelerated filer ☐ <br> Non-accelerated filer ☐ Smaller reporting company ☐ <br> Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

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[**TABLE OF CONTENTS**](#TOC)

#### PROSPECTUS

### Wintrust Financial Corporation

### Debt Securities, Common Stock, Preferred Stock, Depositary Shares, Warrants, Stock Purchase Contracts, Stock Purchase Units and Hybrid Securities Combining Elements of the Foregoing
This prospectus relates to the potential offer and sale, in one or more offerings, of debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts, stock purchase units and hybrid securities combining elements of the foregoing. In addition, certain other persons to be identified in a prospectus supplement may offer and sell our securities. We will not receive any proceeds from any sale of securities by such persons.

This prospectus provides a general description of the securities we or certain selling securityholders and their successors, including transferees, which we collectively refer to as selling securityholders, may offer. Each time we sell or any selling securityholder sells securities, we will describe the specific terms of the securities offered in one or more supplements to this prospectus at the time of each offering. Those terms may include maturity, interest rate, sinking fund terms, currency of payments, dividends, redemption terms, listing on a securities exchange, amount payable at maturity, conversion or exchange rights, liquidation amount, subsidiary guarantees and subordination.

We and any selling securityholder may offer the securities on a continuous or delayed basis from time to time directly or through underwriters, dealers or agents and in one or more public or private transactions and at fixed prices, prevailing market prices, at prices related to prevailing market prices or at negotiated prices. If any offering involves underwriters, dealers or agents, we will describe our and any selling securityholder's arrangements with them in the prospectus supplement that relates to that offering, and such selling securityholder will be responsible for underwriting discounts or commissions or agents' commissions with respect to any securities they sell.

This prospectus may not be used to offer and sell the securities unless accompanied by a prospectus supplement. A prospectus supplement may add, update or change information contained in this prospectus. You should read this prospectus and the applicable prospectus supplement, as well as the documents incorporated and deemed to be incorporated by reference in this prospectus, carefully before you invest.

Our common stock is quoted on The NASDAQ Global Select Market under the trading symbol "WTFC." On May 6, 2026, the last sales price on The NASDAQ Global Select Market for our common stock was $153.28. None of the other securities that may be offered pursuant to this prospectus are listed on an exchange. If we decide to list or seek a quotation for any other securities, the prospectus supplement relating to those securities will disclose the exchange or market on which such securities will be listed or quoted.

 **Investing in our securities involves risk. See "Risk Factors" included on page [1](#tRIFA) of this prospectus and in any applicable prospectus supplement, in addition to the risk factors that are incorporated by reference in this prospectus or any applicable prospectus supplement.** 

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

These securities will not be savings accounts, deposits or other obligations of any bank or non-bank subsidiary of ours and are not insured or guaranteed by the Federal Deposit Insurance Corporation, which we refer to as the FDIC, or any other governmental agency.

Our principal executive office is located at 9700 W. Higgins Road, Suite 800, Rosemont, Illinois 60018, telephone number: (847) 939-9000.

The date of this prospectus is May 7, 2026.

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[**TABLE OF CONTENTS**](#TOC)

#### **TABLE OF CONTENTS**

#### Prospectus

---

| | |
|:---|:---|
| | **Page**  |
| [ABOUT THIS PROSPECTUS](#tATP)  | [ii](#tATP) |
| [WHERE YOU CAN FIND MORE INFORMATION](#tWYCF)  | [iii](#tWYCF) |
| [SPECIAL NOTE CONCERNING FORWARD-LOOKING STATEMENTS](#tSNCF)  | [iv](#tSNCF) |
| [THE COMPANY](#tTHCO)  | [1](#tTHCO) |
| [RISK FACTORS](#tRIFA)  | [1](#tRIFA) |
| [USE OF PROCEEDS](#tUOP)  | [1](#tUOP) |
| [GENERAL DESCRIPTION OF SECURITIES](#tGDOS)  | [2](#tGDOS) |
| &nbsp;&nbsp;&nbsp; [Description of Debt Securities](#tDODS)  | [2](#tDODS) |
| &nbsp;&nbsp;&nbsp; [Description of Capital Stock](#tDOCS)  | [12](#tDOCS) |
| &nbsp;&nbsp;&nbsp; [Description of Stock Purchase Contracts and Stock Purchase Units](#tDOSP)  | [17](#tDOSP) |
| &nbsp;&nbsp;&nbsp; [Description of Warrants](#tDOW)  | [18](#tDOW) |
| [BOOK-ENTRY SYSTEM](#tBOSY)  | [19](#tBOSY) |
| [PLAN OF DISTRIBUTION](#tPOD)  | [21](#tPOD) |
| [LEGAL MATTERS](#tLEMA)  | [23](#tLEMA) |
| [EXPERTS](#tEXP)  | [23](#tEXP) |

---

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[**TABLE OF CONTENTS**](#TOC)

#### ABOUT THIS PROSPECTUS
This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission, which we refer to as the SEC, as a "well-known seasoned issuer" as defined in Rule 405 under the Securities Act of 1933, as amended, which we refer to as the Securities Act, utilizing an automatic "shelf" registration process. Under this automatic shelf registration process, we or any selling securityholder may offer and sell, in one or more offerings, the securities described in this prospectus from time to time. This prospectus provides you with a general description of the securities we or any selling securityholder may offer. Each time we offer or any selling securityholder offers these securities, we will provide a prospectus supplement that will contain specific information about the terms of that offering. The prospectus supplement may also add, update or change information contained in this prospectus. Please carefully read this prospectus and the applicable prospectus supplement together with the additional information described under the heading "Where You Can Find More Information."

This prospectus omits some information contained in the registration statement in accordance with SEC rules and regulations. You should review the information and exhibits included in the registration statement for further information about us and the securities we are offering. Statements in this prospectus concerning any document we filed as an exhibit to the registration statement or that we otherwise filed with the SEC are not intended to be comprehensive and are qualified in their entirety by reference to those filings. You should review the complete document to evaluate these statements.

 **You should only assume that the information in this prospectus or in any prospectus supplement is accurate as of the date on the front of the document. Our business, financial condition, results of operations and prospects may have changed since that date.** 

Each reference in this prospectus to "Wintrust," "the Company," "we," "us" and "our" means Wintrust Financial Corporation and its consolidated subsidiaries, unless the context requires otherwise.

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#### WHERE YOU CAN FIND MORE INFORMATION
We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains an internet site that contains reports, proxy and information statements and other information regarding issuers that file electronically with the SEC, including us. The SEC's internet site can be found at http://www.sec.gov. We make available free of charge most of our SEC filings on the investor relations page of our website at http://www.wintrust.com as soon as reasonably practicable after we electronically file these materials with the SEC. You may access these SEC filings on our website. Except for those SEC filings incorporated by reference in this prospectus, none of the other information on our website is part of this prospectus.

The SEC allows us to "incorporate by reference" into this prospectus the information we file with the SEC, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus, and information that we file later with the SEC that is incorporated by reference herein will automatically update and supersede this information. SEC rules and regulations also permit us to "furnish" rather than "file" certain reports and information with the SEC. Any such reports or information which we have indicated or indicate in the future as being "furnished," including any information furnished under either Item 2.02 or Item 7.01 or any related exhibit furnished under Item 9.01(d) of any Current Report on Form 8-K unless, and except to the extent, specified in any such Current Report on Form 8-K or in any applicable prospectus supplement, shall not be deemed to be incorporated by reference into or otherwise become a part of this prospectus, regardless of when furnished to the SEC. We incorporate by reference the following documents we filed with the SEC (file number 001-35077) and any future filings that we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended, which we refer to as the Exchange Act, until the offerings of the securities contemplated by this prospectus are terminated:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • [our Annual Report on Form 10-K for the year ended December 31, 2025 filed with the SEC on February 26, 2026;](https://www.sec.gov/ix?doc=/Archives/edgar/data/1015328/000101532826000007/wtfc-20251231.htm)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • [our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 filed with the SEC on May 6, 2026;](https://www.sec.gov/ix?doc=/Archives/edgar/data/1015328/000101532826000014/wtfc-20260331.htm)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • those portions of [our Definitive Proxy Statement on Schedule 14A filed with the SEC on April 9, 2026](https://www.sec.gov/ix?doc=/Archives/edgar/data/1015328/000110465926041498/tm261521-1_def14a.htm) incorporated by reference in [our Annual Report on Form 10-K for the year ended December 31, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/1015328/000101532826000007/wtfc-20251231.htm); and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the description of our common stock, which is registered under Section 12 of the Exchange Act, in our [Form 8-A filed with the SEC on January 3, 1997](https://www.sec.gov/Archives/edgar/data/1015328/0000913849-97-000004-index.html), including any subsequently filed amendments and reports updating such description.

You may request a copy of these filings, other than an exhibit to a filing unless that exhibit is specifically incorporated by reference into that filing, at no cost, by writing to us at the following address or calling us at the following telephone number:

Wintrust Financial Corporation

9700 W. Higgins Road, Suite 800

Rosemont, Illinois 60018

Attention: Investor Relations

(847)939-9000

We will provide to each person, including any beneficial owner, to whom a copy of this prospectus is delivered a copy of any or all of the information that has been incorporated by reference in this prospectus.

You should rely only on the information incorporated by reference or provided in this prospectus or any prospectus supplement. We have not authorized anyone else to provide you with different information or to make any representations other than as contained in this prospectus or in any prospectus supplement. This document may only be used where it is lawful to sell these securities. Neither we nor any selling securityholders are making any offer of these securities in any state where the offer is not permitted.

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#### SPECIAL NOTE CONCERNING FORWARD-LOOKING STATEMENTS
This prospectus, the documents incorporated by reference or deemed incorporated by reference, any related prospectus supplement and any other written or oral statements made by us from time to time may contain forward-looking statements within the meaning of federal securities laws. Forward-looking information can be identified through the use of words such as "intend," "plan," "project," "expect," "anticipate," "believe," "estimate," "contemplate," "possible," "will," "may," "should," "would" and "could." Forward-looking statements and information are not historical facts, are premised on many factors and assumptions, and represent only management's expectations, estimates and projections regarding future events. Similarly, these statements are not guarantees of future performance and involve certain risks and uncertainties that are difficult to predict, and which may include, but are not limited to, those listed below and the risk factors discussed under Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2025, as well as other risks and uncertainties set forth from time to time in our other filings with the SEC and those set forth below.

We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995, and are including this statement for purposes of invoking these safe harbor provisions. Such forward-looking statements may be deemed to include, among other things, statements relating to our future financial performance, the performance of our loan portfolio, the expected amount of future credit reserves and charge-offs, delinquency trends, growth plans, regulatory developments, securities that we may offer from time to time and management's long-term performance goals, as well as statements relating to the anticipated effects on our financial condition and results of operations from expected developments or events, our business and growth strategies, including future acquisitions of banks, specialty finance or wealth management businesses, internal growth and plans to form additional de novo banks or branch offices. Actual results could differ materially from those addressed in the forward-looking statements as a result of numerous factors and uncertainties, including the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • economic conditions and events that affect the economy, housing prices, the job market and other factors that may adversely affect our liquidity and the performance of our loan portfolios, including an actual or threatened U.S. government shutdown, debt default or rating downgrade, particularly in the markets in which we operate;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • negative effects suffered by us or our customers resulting from changes in U.S. or international trade policies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the extent of defaults and losses on our loan portfolio, which may require further increases in our allowance for credit losses;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • estimates of fair value of certain of our assets and liabilities, which could change in value significantly from period to period;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the financial success and economic viability of the borrowers of our commercial loans;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • commercial real estate market conditions in the Chicago metropolitan area, southern Wisconsin and west Michigan;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the extent of commercial and consumer delinquencies and declines in real estate values, which may require further increases in our allowance for credit losses;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • inaccurate assumptions in our analytical and forecasting models used to manage our loan portfolio;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • changes in the level and volatility of interest rates, the capital markets and other market indices that may affect, among other things, our liquidity and the value of our assets and liabilities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the interest rate environment, including a prolonged period of low interest rates or rising interest rates, either broadly or for some types of instruments, which may affect our net interest income and net interest margin, and which could materially adversely affect our profitability;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • competitive pressures in the financial services business which may affect the pricing of our loan and deposit products as well as our services (including wealth management services), which may result in loss of market share and reduced income from deposits, loans, advisory fees and income from other products;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure to identify and complete favorable acquisitions in the future or unexpected losses, difficulties or developments related to our recent or future acquisitions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • unexpected difficulties and losses related to FDIC-assisted acquisitions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • harm to our reputation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any negative perception of our financial strength;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our ability to raise additional capital on acceptable terms when needed;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • disruption in capital markets, which may lower fair values for our investment portfolio;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our ability to use technology to provide products and services that will satisfy customer demands and create efficiencies in operations and to manage risks associated therewith;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure or breaches of our security systems or infrastructure, or those of third parties;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • security breaches, including denial of service attacks, hacking, social engineering attacks, malware intrusion and similar events or data corruption attempts and identity theft;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • adverse effects on our information technology systems, or those of third parties, resulting from failures, human error or cyberattacks (including ransomware);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • adverse effects of failures by our vendors to provide agreed upon services in the manner and at the cost agreed, particularly our information technology vendors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • increased costs as a result of protecting our customers from the impact of stolen debit card information;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • accuracy and completeness of information we receive about customers and counterparties to make credit decisions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our ability to attract and retain senior management experienced in the banking and financial services industries;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • environmental liability risk associated with lending activities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the impact of any claims or legal actions to which we are subject, including any effect on our reputation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • losses incurred in connection with repurchases and indemnification payments related to mortgages and increases in reserves associated therewith;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the loss of customers as a result of technological changes allowing consumers to complete their financial transactions without the use of a bank;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the soundness of other financial institutions and the impact of recent failures of financial institutions, including broader financial institution liquidity risk and concerns;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the expenses and delayed returns inherent in opening new branches and de novo banks;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • liabilities, potential customer loss or reputational harm related to closings of existing branches;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • examinations and challenges by tax authorities, and any unanticipated impact of tax legislation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • changes in accounting standards, rules and interpretations, and the impact on our financial statements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our ability to receive dividends from our subsidiaries;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • a decrease in our capital ratios, including as a result of declines in the value of our loan portfolios, or otherwise;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • legislative or regulatory changes, particularly changes in regulation of financial services companies and/or the products and services offered by financial services companies;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • changes in laws, regulations, rules, standards and contractual obligations regarding data privacy and cybersecurity;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • a lowering of our credit rating;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • changes in U.S. monetary policy and changes to the Federal Reserve's balance sheet, including changes in response to persistent inflation or otherwise;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • regulatory restrictions upon our ability to market our products to consumers and limitations on our ability to profitably operate our mortgage business;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • increased costs of compliance, heightened regulatory capital requirements and other risks associated with changes in regulation and the regulatory environment;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the impact of heightened capital requirements;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • increases in our FDIC insurance premiums, or the collection of special assessments by the FDIC;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • delinquencies or fraud with respect to our premium finance business;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • credit downgrades among commercial and life insurance providers that could negatively affect the value of collateral securing our premium finance loans;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our ability to comply with covenants under our credit facility;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • fluctuations in the stock market, which may have an adverse impact on our wealth management business and brokerage operation; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • widespread outages of operational, communication or other systems, whether internal or provided by third parties, natural or other disasters (including acts of terrorism, armed hostilities and pandemics), and the effects of climate change.

Therefore, there can be no assurances that future actual results will correspond to any forward-looking statement. You are cautioned not to place undue reliance on any forward-looking statement made by us or on our behalf. Any such statement speaks only as of the date the statement was made or as of such date that may be referenced within the statement. We undertake no obligation to update any forward-looking statement to reflect the impact of circumstances or events that arise after the date the forward-looking statement was made. You are advised, however, to consult further disclosures management makes on related subjects in Wintrust's reports filed with the SEC.

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#### THE COMPANY
Wintrust Financial Corporation, an Illinois corporation, which was incorporated in 1992, is a financial holding company based in Rosemont, Illinois, with total assets of approximately $72.2 billion as of March 31, 2026. We provide community-oriented, personal and commercial banking services to customers generally located in the Chicago metropolitan area, southern Wisconsin, northwest Indiana and west Michigan through our 16 wholly-owned-banking subsidiaries, as well as the origination of residential mortgages for sale into the secondary market through Wintrust Mortgage, a division of Barrington Bank & Trust Company, N.A. In addition, we provide specialty finance services, including financing for the payment of property and casualty insurance premiums and life insurance premiums on a national basis through FIRST Insurance Funding, a division of our wholly-owned subsidiary Lake Forest Bank & Trust Company, N.A. ("Lake Forest Bank"), and Wintrust Life Finance, a division of Lake Forest Bank, and in Canada through our premium finance company, First Insurance Funding of Canada, lease financing and other direct leasing opportunities through our wholly-owned subsidiary, Wintrust Asset Finance, Inc., and short-term accounts receivable financing and outsourced administrative services through our wholly-owned subsidiary, Tricom, Inc. of Milwaukee. Further, we provide a full range of wealth management services primarily to customers in our market area through four separate subsidiaries: Wintrust Private Trust Company, N.A., Wintrust Investments, LLC, Great Lakes Advisors, LLC and Chicago Deferred Exchange Company, LLC.

Our common stock, no par value, and our 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, are traded on The NASDAQ Global Select Market, or NASDAQ, under the ticker symbols "WTFC" and "WTFCN," respectively. Wintrust's principal executive office is located at 9700 W. Higgins Road, Suite 800, Rosemont, Illinois 60018, and our telephone number is (847) 939-9000.

#### RISK FACTORS
Investing in our securities involves risk. Before deciding to purchase any of the securities to which this prospectus relates, you should carefully consider the discussion of risks and uncertainties under the heading "Risk Factors" in our most recent Annual Report on Form 10-K and under similar headings in our subsequent Quarterly Reports on Form 10-Q, as well as the other risks and uncertainties described in any other documents incorporated by reference in this prospectus or in any applicable prospectus supplement. See the section entitled "Where You Can Find More Information" in this prospectus.

#### USE OF PROCEEDS
We will not receive any proceeds from any securities sold by a selling securityholder.

Except as otherwise provided in the prospectus supplement accompanying this prospectus, we expect to use the net proceeds from the sale by the Company of the offered securities for general corporate purposes. These purposes may include, without limitation, investments at the holding company level, providing capital to support our growth, acquisitions or other business combinations, including FDIC-assisted acquisitions, and reducing or refinancing existing debt.

Pending such use, we may temporarily invest the net proceeds in short-term securities or reduce our short-term indebtedness, or we may hold the net proceeds in deposit accounts in our subsidiary banks.

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#### GENERAL DESCRIPTION OF SECURITIES
We or any selling securityholder may offer under this prospectus debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts, stock purchase units and hybrid securities combining elements of the foregoing, either individually or as units consisting of two or more securities.

The following description of the terms of these securities sets forth some of the general terms and provisions of securities that may be offered by us or any selling securityholder. The particular terms of securities offered by any prospectus supplement and the extent, if any, to which the general terms set forth below do not apply to those securities will be described in the applicable prospectus supplement. In addition, if we offer securities as units, the terms of the units will be described in the applicable prospectus supplement. If the information contained in the prospectus supplement differs from the following description, you should rely on the information in the prospectus supplement.

#### Description of Debt Securities
We may issue debt securities from time to time in one or more series. The following briefly summarizes the material provisions of the indentures, as defined below, pursuant to which such debt securities may be issued. As used in this summary, the term "Wintrust" means Wintrust Financial Corporation and does not include any of its subsidiaries. This summary is not complete and is qualified in its entirety by reference to such indentures. You should read the more detailed provisions of the indentures, including the defined terms, for provisions that may be important to you. You should also review the particular terms of a series of debt securities, which will be described in more detail in the applicable prospectus supplement.

#### General
We may issue, and offer pursuant to this prospectus, senior or subordinated debt securities. The senior debt securities and, in the case of debt securities in bearer form, any coupons to these securities will constitute part of our senior debt and, except as otherwise included in the applicable prospectus supplement, will rank on a parity with all of our other unsecured and unsubordinated debt. The subordinated debt securities and, in the case of debt securities in bearer form, any coupons to these securities will constitute part of our subordinated debt and will be subordinate and junior in right of payment to all of our "senior indebtedness," as defined below. If this prospectus is being delivered in connection with a series of subordinated debt securities, the applicable prospectus supplement or the information we incorporate in this prospectus by reference will indicate the approximate amount of senior indebtedness outstanding as of the end of the most recent fiscal quarter.

Our senior debt securities will be issued under a senior indenture, the form of which is included as an exhibit to the registration statement of which this prospectus is a part, and the related supplemental indenture for such senior debt securities, if any, which we refer to collectively as the "senior indenture." Our subordinated debt securities will be issued under a subordinated indenture, the form of which is included as an exhibit to the registration statement of which this prospectus is a part, and the related supplemental indenture for such subordinated debt securities, if any, which we refer to collectively as the "subordinated indenture." We refer to the senior indenture and the subordinated indenture collectively as the "indentures," and we refer to senior debt securities and subordinated debt securities collectively as the "debt securities."

The provisions of the indentures allow us to "reopen" a previous issue of a series of debt securities and issue additional debt securities of that issue. The debt securities may be denominated and payable in U.S. dollars. The debt securities may bear interest at a fixed rate or a floating rate, which, in either case, may be zero, or at a rate that varies during the lifetime of the debt security. The debt securities may be sold at a discount below their stated principal amount.

The indentures do not limit the aggregate principal amount of indebtedness that may be issued thereunder and provide that debt securities may be issued thereunder from time to time in one or more series, as authorized by Wintrust. The covenants and provisions in the indentures afford the holders of the debt securities of any series only limited protection in the event of a highly leveraged transaction, reorganization, restructuring, merger or similar transaction involving Wintrust that may adversely affect such holders.

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#### Terms Specified in Prospectus Supplement
We will describe in a supplement to this prospectus the particular terms of any debt securities being offered and any modifications of or additions to the general terms of the debt securities. Accordingly, you should read both the prospectus supplement relating to the particular debt securities being offered and the general description of debt securities set forth in this prospectus before investing.

The prospectus supplement will contain, where applicable, the following terms of and other information relating to any offered debt securities:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • classification as senior or subordinated debt securities and the specific designation;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • aggregate principal amount, purchase price and denomination, if, in the case of denomination, other than $1,000 and any integral multiple thereof;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the currency in which the debt securities are denominated and/or in which principal and/or interest, if any, is payable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • original issue and stated maturity date or dates;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the interest rate or rates or the method by which the calculation agent will determine the interest rate or rates, if any;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the interest payment dates, if any;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the manner and place or places for payment of the principal of and any premium and/or interest on the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any repayment, redemption, prepayment, repurchase or sinking fund provisions, including any redemption notice provisions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • whether we will issue the debt securities in registered form or bearer form or both and, if we are offering debt securities in bearer form, any restrictions applicable to the exchange of one form for another and to the offer, sale and delivery of those debt securities in bearer form and whether such bearer securities will be issued with coupons;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • whether we will issue the debt securities in temporary form and under what terms and conditions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the terms on which holders of the debt securities may convert or exchange these securities into or for common or preferred stock or other securities of ours offered hereby, into or for common or preferred stock or other securities of an entity affiliated with us or debt or equity or other securities of an entity not affiliated with us, or for the cash value of our stock or any of the above securities, the terms on which conversion or exchange may occur, including whether conversion or exchange is mandatory, at the option of the holder or at our option, the period during which conversion or exchange may occur, the initial conversion or exchange price or rate and the circumstances or manner in which the amount of common or preferred stock or other securities issuable upon conversion or exchange may be adjusted;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • information as to the methods for determining the amount of principal or interest payable on any date and/or the currencies, securities or baskets of securities, commodities or indices to which the amount payable on the date is linked;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any agents for the debt securities, including trustees, depositories, authenticating or paying agents, transfer agents or registrars;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any addition to, or modification or deletion of, any events of default or covenants contained in the applicable indenture relating to the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • a discussion of any material U.S. federal income tax considerations applicable to the debt securities; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any other terms and conditions set forth therein.

We may issue the debt securities as original issue discount securities, which are securities that are offered and sold at a substantial discount to their stated principal amount, or as payment-in-kind securities

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which may constitute original issue discount securities for U.S. federal income tax purposes. The U.S. federal income tax considerations applicable to any such debt securities may be described in the applicable prospectus supplement.

#### Registration, Denominations, Exchange and Transfer of Debt Securities
Unless otherwise specified in the applicable prospectus supplement, the debt securities of any series will be issued only as registered securities, in global or certificated form and in denominations of $1,000 and any integral multiple thereof.

As described in the section entitled "Book-Entry System," the debt securities of any series may be issued in certificated form in exchange for a global security. In the event that debt securities of such series are issued in certificated form, such debt securities may be transferred or exchanged at the offices described below. In the event debt securities of any series are issued in certificated form, payments of principal and interest will be payable, the transfer of the debt securities of such series will be registrable and debt securities of such series will be exchangeable for debt securities of other denominations of a like aggregate principal amount at the corporate trust office of the trustee in New York, New York. Interest payments on certificated debt securities of any series may be made at the option of the Company by check mailed to the address of the persons entitled thereto. See "Book-Entry System."

#### Subordination of the Subordinated Debt Securities
The subordinated indenture will provide that the subordinated debt securities are subordinated and junior in right of payment to Wintrust's obligations to the holders of senior indebtedness (as defined below) to the extent specified in the subordinated indenture. This means that in the case of any insolvency, liquidation or other certain specified events of or relating to Wintrust as a whole, whether voluntary or involuntary, all obligations to holders of senior indebtedness shall be entitled to be paid in full before any payment shall be made on account of the principal of or interest on the subordinated debt securities. In the event of any such proceeding, after payment in full of all sums owing with respect to senior indebtedness, the holders of the subordinated debt securities, together with the holders of any obligations of Wintrust ranking on a parity with the subordinated debt securities, shall be entitled to be paid from the remaining assets of Wintrust the amounts at the time due and owing on account of unpaid principal of and interest on the subordinated debt securities before any payment or other distribution, whether in cash, property or otherwise, shall be made on account of any capital stock or any obligations of Wintrust ranking junior to the subordinated debt securities.

In addition, if there shall have occurred and be continuing (a) a default in any payment with respect to any senior indebtedness or (b) an event of default with respect to any senior indebtedness as a result of which the maturity thereof is accelerated, unless and until such payment default or event of default shall have been cured or waived or shall have ceased to exist, no payments shall be made by Wintrust with respect to the principal or interest on the subordinated debt securities.

The term "senior indebtedness" means the following, whether now outstanding or subsequently created, assumed or incurred:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all indebtedness of Wintrust for money borrowed, including any obligation of, or any obligation guaranteed by, Wintrust, for the repayment of borrowed money, whether or not evidenced by bonds, debentures, securities, notes or other written instruments;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any deferred obligation of Wintrust for the payment of the purchase price of property or assets acquired other than in the ordinary course of business;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all obligations, contingent or otherwise, of Wintrust in respect of any letters of credit, bankers acceptances, security purchase facilities and similar transactions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all capital lease obligations of Wintrust;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all obligations of Wintrust in respect of interest rate swap, cap or other agreements, interest rate future or option contracts, currency swap agreements, currency future or option contacts, commodity contracts and other similar agreements;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all obligations of the type referred to in the above five bullets of other persons for the payment of which Wintrust is responsible or liable as obligor, guarantor or otherwise;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all obligations of the type referred to in the above six bullets of other persons secured by any lien on any property or assets of Wintrust, whether or not such obligation is assumed by Wintrust; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any obligations of Wintrust to its general creditors, as defined and required by the Board of Governors of the Federal Reserve System, or the Federal Reserve, under its final Basel III capital rules in 12 C.F.R. Part 217 for subordinated debt to qualify as Tier 2 capital;

*provided*, *however*, that the term "senior indebtedness" does not include:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any securities issued under the subordinated indenture (including the subordinated debt securities);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Wintrust's junior subordinated debt securities underlying trust preferred securities issued by subsidiary trusts of Wintrust which are outstanding or which are issued by a subsidiary trust of Wintrust;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any guarantee in respect of any trust preferred securities of a subsidiary trust of Wintrust; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any indebtedness or any guarantee ranking junior to, or ranking on a parity with, such securities and the issuance of which (i) has received the concurrence or approval of the Federal Reserve or its staff or (ii) does not at the time of issuance prevent such securities (or any security or unit of which such securities comprise a part) from qualifying for Tier 1 capital treatment (irrespective of any limits on the amount of Wintrust's Tier 1 capital) under applicable capital adequacy guidelines, regulations, policies, published interpretations or any applicable concurrence or approval of the Federal Reserve or its staff.

The subordinated debt securities will rank senior to all of Wintrust's equity securities, including its preferred stock, whether now outstanding or subsequently created.

The indentures do not limit the aggregate amount of senior indebtedness that may be issued by Wintrust.

#### Events of Default
*Events of Default and Certain Remedies Under the Senior Indenture*. Under the senior indenture, each of the following will be an "event of default" with respect to a series of senior debt securities:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure to pay any interest upon the senior debt securities of any series as and when it becomes due and payable, which default continues for a period of 30 days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure to pay the principal of any of the senior debt securities as and when it becomes due and payable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure on the part of Wintrust duly to observe or perform any other of the covenants or agreements on the part of Wintrust in the senior debt securities of such series or in the senior indenture with respect to the senior debt securities of such series, and continuance of such failure for a period of 90 days after the date on which written notice of such failure, requiring Wintrust to remedy the same, shall have been given to Wintrust by the trustee, or to Wintrust and the trustee by the holders of at least 25% in aggregate principal amount of the senior debt securities of such series at the time outstanding; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • specified events of bankruptcy, insolvency or reorganization, or court appointment of a receiver, liquidator or trustee of Wintrust.

If an event of default described in any of the first, second or third bullets above occurs and is continuing, then and in each such case either the trustee or the holders of not less than 25% in aggregate initial principal amount of the senior debt securities of any such series then outstanding (each such series treated as a separate class), by notice in writing to Wintrust (and to the trustee if given by holders), may declare the principal amount (or, if the senior debt securities of any such series are original issue discount securities, such portion of the principal amount as may be specified in the terms of such series) of all the senior debt

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securities of such series to be due and payable immediately, and upon any such declaration the same shall become immediately due and payable. If an event of default described in the fourth bullet above occurs and is continuing, then and in each such case, the principal amount (or, if the senior debt securities of such series are original issue discount securities, such portion of the principal amount as may be specified in the terms of such series) of all senior debt securities of such series shall be and become immediately due and payable, without any notice or other action by the trustee or any holder, to the fullest extent permitted by law.

The foregoing paragraph, however, is subject to the condition that, at any time after such a declaration of acceleration or an acceleration, and before any judgment or decree for the payment of the money due shall have been obtained or entered, the holders of a majority in aggregate principal amount of the senior debt securities of such series then outstanding, by written notice to Wintrust and to the trustee, may waive all defaults and rescind and annul such declaration or acceleration and its consequences, if:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Wintrust shall pay or shall deposit with the trustee a sum sufficient to pay:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all matured installments of interest on all the senior debt securities of such series (with interest on overdue installments of interest (to the extent that payment of such interest is enforceable under applicable law) at the rate borne by the senior debt securities of such series (or yield to maturity, in the case of original issue discount securities) to the date of such payment or deposit);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all principal on any senior debt securities of such series that has become due otherwise than by acceleration (with interest on such principal) at the rate borne by the senior debt securities of such series (or yield to maturity, in the case of original issue discount securities) to the date of such payment on deposit;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all sums paid or advanced by the trustee and the reasonable compensation, expenses, disbursements and advances of the trustee, its agents and counsel and any other amounts due the trustee under the senior indenture; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any and all defaults with respect to senior debt securities of such series under the senior indenture, other than the nonpayment of principal and accrued interest on senior debt securities of such series that shall have become due by acceleration, shall have been cured or waived as provided below in the penultimate paragraph of this section.

No such waiver or rescission and annulment shall extend or shall affect any subsequent default or shall impair any right consequent thereon.

*Events of Default and Certain Remedies Under the Subordinated Indenture*. Under the subordinated indenture, each of the following will be an "event of default" with respect to a series of subordinated debt securities:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure to pay any interest upon the subordinated debt securities of any series as and when it becomes due and payable, which default continues for a period of 30 days;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure to pay the principal of any of the subordinated debt securities as and when it becomes due and payable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • failure on the part of Wintrust duly to observe or perform any other of the covenants or agreements on the part of Wintrust in the subordinated debt securities of such series or in the subordinated indenture with respect to the subordinated debt securities of such series, and continuance of such failure for a period of 90 days after the date on which written notice of such failure, requiring Wintrust to remedy the same, shall have been given to Wintrust by the trustee, or to Wintrust and the trustee by the holders of at least 25% in aggregate principal amount of the subordinated debt securities of such series at the time outstanding; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • specified events of bankruptcy, insolvency or reorganization, or court appointment of a receiver, liquidator or trustee of Wintrust.

If an event of default described in the fourth bullet above occurs and is continuing, then and in each such case either the trustee or the holders of not less than 25% in aggregate initial principal amount of the subordinated debt securities of any such series then outstanding (each such series treated as a separate class),

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by notice in writing to Wintrust (and to the trustee if given by holders), may declare the principal amount (or, if the subordinated debt securities of any such series are original issue discount securities, such portion of the principal amount as may be specified in the terms of such series) of all the subordinated debt securities of such series to be due and payable immediately, and upon any such declaration the same shall become immediately due and payable. This provision, however, is subject to the condition that, at any time after such a declaration of acceleration, and before any judgment or decree for the payment of the money due shall have been obtained or entered, the holders of a majority in aggregate principal amount of the subordinated debt securities of such series then outstanding, by written notice to Wintrust and to the trustee, may waive all defaults and rescind and annul such declaration and its consequences, if:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Wintrust shall pay or shall deposit with the trustee a sum sufficient to pay:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all matured installments of interest on all the subordinated debt securities of such series that shall have become due otherwise than by acceleration (with interest on overdue installments of interest (to the extent that payment of such interest is enforceable under applicable law) at the rate borne by the subordinated debt securities of such series (or yield to maturity, in the case of original issue discount securities), to the date of such payment or deposit);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all sums paid or advanced by the trustee and the reasonable compensation, expenses, disbursements and advances of the trustee, its agents and counsel and any other amounts due the trustee under the subordinated indenture; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any and all defaults with respect to subordinated debt securities of such series under the subordinated indenture, other than the nonpayment of principal and accrued interest on subordinated debt securities of such series that shall have become due by acceleration, shall have been cured or waived as provided below in the penultimate paragraph of this section.

No such waiver or rescission and annulment shall extend or shall affect any subsequent default or shall impair any right consequent thereon.

Unless otherwise expressly provided in the applicable prospectus supplement, there is no right of acceleration upon the occurrence of an event of default described in the first three bullets of the definition of "event of default" above.

*Remedies on Events of Default Under Either Indenture*. Under either indenture, in the case of default in the payment of (i) any installment of interest upon any debt securities of any series as and when it becomes due and payable, which default continues for a period of 30 days, or (ii) the principal of any of the debt securities of such series as and when it becomes due and payable, then, upon demand of the trustee, Wintrust will pay to the trustee, for the benefit of the holders of the debt securities of such series, the whole amount that then shall have become due and payable on all such debt securities for principal, premium, if any, or interest, or any combination thereof, as the case may be, with interest upon the portion of the overdue principal and (to the extent that payment of such interest is enforceable under applicable law) upon the overdue installments of interest, at the rate borne by the debt securities of such series or yield to maturity (in the case of original issue discount securities); and, in addition, such further amount as shall be sufficient to cover the costs and expenses of collection, including reasonable compensation, expenses, disbursements and advances of the trustee, its agent, attorneys and counsel. If Wintrust does not pay such amounts upon such demand, the trustee shall be entitled and empowered to institute any actions or proceeding at law or in equity for the collection of the sums so due and unpaid, and may prosecute any such action or proceeding to judgment or final decree, and may enforce any such judgment or final decree against Wintrust or any other obligor on the debt securities of such series and collect in the manner provided by law out of the property of Wintrust or any other obligor on the debt securities of such series, wherever situated, the money adjudged or decreed to be payable.

No holder of debt securities of any series shall have any right to institute any suit, action or proceeding in equity or at law upon or under or with respect to the applicable indenture or for the appointment of a receiver or trustee, or for any other remedy under the applicable indenture, unless such holder previously shall have given to the trustee written notice of default and of the continuance thereof and unless also:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the holders of not less than 25% in aggregate principal amount of the debt securities of such series then outstanding shall have made written request upon the trustee to institute such action, suit or

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proceeding in its own name as trustee under the applicable indenture and shall have offered to the trustee such reasonable security or indemnity as the trustee may require against the costs, expenses and liabilities to be incurred in compliance with such request;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the trustee for 60 days after its receipt of such notice, request and offer of indemnity shall have neglected or refused to institute any such action, suit or proceeding; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • no direction inconsistent with such written request has been given to the trustee during such 60-day period by the holders of a majority in principal amount of the outstanding debt securities;

it being understood and intended, and being expressly covenanted by each person who acquires and holds a debt security of any series with every other such person holding outstanding debt securities under the applicable indenture, that no one or more holders of outstanding debt securities under the applicable indenture shall have any right in any manner whatever by virtue of or by availing of any provision of such indenture to affect, disturb or prejudice the rights of any other holder of such debt securities, or to obtain or seek to obtain priority over or preference to any other such holder, or to enforce any right under such indenture, except in the manner provided in such indenture and for the equal, ratable and common benefit of all holders of outstanding debt securities under such indenture. Notwithstanding any other provision of the applicable indenture, however, the right of any holder of debt securities of any series to receive payment of principal and interest on any such debt securities on or after their respective due dates, or to institute suit for the enforcement of any such payment on or after such respective dates against Wintrust, shall not be impaired or affected without the consent of such holder.

Subject to certain restrictions, the holders of a majority in aggregate principal amount of the debt securities of any series affected (voting as one class) at the time outstanding shall have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, or exercising any trust or power conferred on the trustee with respect to the debt securities of such series.

Prior to any declaration that the principal of the outstanding debt securities of any series affected is due and payable, the holders of a majority in aggregate principal amount (or, if the debt securities are original issue discount securities, such portion of the principal as is then accelerable under the applicable indenture) of the debt securities of such series at the time outstanding on behalf of the holders of all of the debt securities of such series may waive any past default or event of default under the applicable indenture and its consequences except (i) a default under a covenant or provision in such indenture that cannot be modified without the consent of each holder of a debt security of such series affected thereby or (ii) in the case of senior debt securities under the senior indenture only, in the payment of the principal of or interest on any senior debt security of such series of senior debt securities. Upon any such waiver, Wintrust, the trustee and the holders of the debt securities of such series shall be restored to their former positions and rights under the applicable indenture, respectively; but no such waiver shall extend to any subsequent or other default or event of default or impair any right consequent thereon.

Wintrust is required to file annually with the applicable trustee a statement of an officer as to the fulfillment by Wintrust of its obligations under the applicable indenture during the preceding year.

The trustee, within 90 days after the occurrence of a default with respect to debt securities of any series, shall mail to all holders of debt securities of such series notice of all such defaults known to the trustee, unless such defaults shall have been cured or waived before the giving of such notice; provided that, except in the case of default in the payment of the principal or interest on any of the debt securities, the trustee shall be protected in withholding such notice if and so long as its board of directors, the executive committee or a trust committee of directors and/or responsible officers of the trustee in good faith determines that the withholding of such notice is in the interest of the holders.

#### Modifications and Amendments
Wintrust and the trustee may amend or supplement the indentures or the debt securities of any series without notice to or the consent of any holder:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to cure any ambiguity, defect or inconsistency in the indentures; *provided* that such amendment or supplement shall not materially and adversely affect the interests of the holders;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to evidence the succession of another person to Wintrust and the assumption by any such successor of the covenants of Wintrust contained in the indentures and the debt securities pursuant to the obligations set forth in "— Consolidation, Merger and Sale of Assets";

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to comply with any requirements of the SEC in connection with the qualification of the indentures under the Trust Indentures Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to evidence and provide for the acceptance of appointment with respect to the debt securities of any or all series by a successor trustee and to add to or change any of the provisions of the applicable indenture as shall be necessary to provide for or facilitate the administration of the trusts under the applicable indenture by more than one trustee;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to establish the form or forms or terms of debt securities of any series or of the coupons pertaining to such series;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to provide for uncertificated or unregistered securities and to make all appropriate changes for such purpose;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to add to the covenants for the benefit of the holders of the debt securities or to surrender any right or power conferred upon Wintrust in the indentures with respect to the debt securities, *provided* that such action shall not adversely affect the interests of the holders of the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to add any events of default with respect to all or any series of the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to delete or modify any events of default with respect to all or any series of the debt securities, the form and terms of which are being established pursuant to a supplemental indenture as permitted in the indenture (and, if any such event of default is applicable to fewer than all such series of the debt securities, specifying the series to which such event of default is applicable) and to specify the rights and remedies of the trustee and the holders of such debt securities in connection therewith;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to secure the debt securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to establish the form of any debt securities and to provide for the issuance of any series of debt securities under the indentures and to set forth the terms thereof;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • to make any change that does not materially and adversely affect the rights of any holder (except as provided in immediately following bullet); and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • in the case of the subordinated indenture, to clarify ambiguities or to meet regulatory requirements for the subordinated debt securities of any series to qualify as Tier 2 capital or other regulatory capital for bank regulatory purposes.

Without prior notice to any holders, Wintrust and the trustee may amend the indentures and the debt securities of any series with the written consent of the holders of a majority in principal amount of the outstanding debt securities of each series affected by such amendment, and the holders of a majority in principal amount of the outstanding debt securities of any series affected thereby (voting as a separate class) by written notice to the trustee may waive future compliance by Wintrust with any provision of the indentures or the debt securities of such series. However, without the consent of each holder affected thereby, an amendment or waiver may not:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • change the stated maturity of the principal of, or any sinking fund obligation or any installment of interest on, such holder's debt security;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • reduce the principal amount thereof or the rate of interest thereon;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • reduce the above-stated percentage of outstanding debt securities the consent of who**s**e holders is necessary to modify or amend the indentures with respect to the debt securities of the relevant series;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • reduce the percentage in principal amount of outstanding debt securities of the relevant series the consent of whose holders is required for any supplemental indenture or for any waiver of compliance with certain provisions of the indentures or certain events of default and their consequences provided for in the indentures;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • impair the right to institute suit for the enforcement of any payment on or with respect to the debt securities; or

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • modify any of the provisions of the subordinated indenture with respect to the subordination of the subordinated debt securities of any series in a manner adverse to holders, except to clarify ambiguities or to meet regulatory requirements for the subordinated debt securities of any series to qualify as Tier 2 capital or other regulatory capital for bank regulatory purposes.

It is not necessary for the consent of any holder to approve the particular form of any proposed amendment, supplement or waiver, but it shall be sufficient if such consent approves the substance thereof. After an amendment, supplement or waiver becomes effective, Wintrust shall give to the holders affected thereby a notice briefly describing the amendment, supplement or waiver. Wintrust will mail supplemental indentures to holders upon request. Any failure of Wintrust to mail such notice, or any defect therein, shall not, however, in any way impair or affect the validity of any such supplemental indentures or waiver.

#### Satisfaction, Discharge and Defeasance
*Satisfaction and Discharge*. Wintrust may discharge most of its obligations under the indentures to holders of the debt securities of any series if:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • it has paid or caused to be paid the principal of and interest on all debt securities of any series outstanding as and when the same shall have become due and payable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • it has delivered to the trustee for cancellation all debt securities of any series authenticated; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • all debt securities of such series not delivered to the trustee for cancellation have become due and payable, or are by their terms to become due and payable within one year, and Wintrust has irrevocably deposited or caused to be deposited an amount of cash or U.S. government obligations with the trustee sufficient to pay at maturity all debt securities of such series not theretofore delivered to the trustee for cancellation, including principal and interest due or to become due on or prior to such date of maturity.

*Defeasance and Discharge; Covenant Defeasance*. Subject to the proper exercise of its defeasance and discharge or covenant defeasance options as discussed below, Wintrust, at its option:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • will be released from any and all obligations in respect of the debt securities of any series, which is known as "defeasance and discharge"; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • need not comply with certain designated covenants regarding the debt securities of any series, which is known as "covenant defeasance."

If Wintrust exercises its covenant defeasance option, the failure to comply with any defeased covenant and any default in the applicable indenture will no longer be a default thereunder.

To exercise either its defeasance and discharge or covenant defeasance option, Wintrust must:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • deposit with the trustee, in trust, cash or U.S. government obligations in an amount sufficient to pay the principal of and each installment of interest on the outstanding debt securities of such series when such payments are due; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • deliver an opinion of counsel or a ruling directed to the trustee received from the Internal Revenue Service, or the IRS, which, in the case of defeasance and discharge, must be based upon a change in applicable U.S. federal income tax law or a ruling or administrative pronouncement of the IRS, to the effect that the holders and beneficial owners of debt securities of such series will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such deposit or defeasance.

When there is a defeasance and discharge, the applicable indenture will no longer govern the debt securities of such series, Wintrust will no longer be liable for payment and the holders of such debt securities will be entitled only to the deposited funds. When there is a covenant defeasance, however, Wintrust will continue to be obligated for installment payments when due if the deposited funds are not sufficient to pay the holders.

The obligations under the indentures to register the transfer or exchange of debt securities, to replace mutilated, defaced, destroyed, lost or stolen debt securities, and to maintain paying agents and hold monies for payment in trust will continue even if Wintrust exercises its defeasance and discharge or covenant defeasance option.

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#### Consolidation, Merger and Sale of Assets
The indentures provide that Wintrust may consolidate with or merge with or into, or sell, convey, transfer, lease or otherwise dispose of all or substantially all of its property and assets to, any person or entity, provided that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Wintrust is the continuing person or the person (if other than Wintrust) formed by such consolidation or into which Wintrust is merged or to which properties and assets of Wintrust are sold, conveyed, transferred or leased shall be an entity organized and validly existing under the laws of the United States of America, any state thereof or the District of Columbia or any jurisdiction thereof and shall expressly assume, by a supplemental indenture, executed and delivered to the trustee, all of the obligations of Wintrust on all of the debt securities and under the applicable indenture and the performance of every other covenant of the applicable indenture on the part of Wintrust; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • Wintrust delivers to the trustee (A) an opinion of counsel regarding the transaction's compliance with the relevant provisions of the applicable indenture and (B) an officers' certificate to the effect that immediately after giving effect to such transaction, no default and no event which, after notice or lapse of time, or both, would become an event of default, shall have occurred and be continuing.

Upon any such consolidation or merger, or any sale, conveyance, transfer, lease or other disposition of all or substantially all of the property and assets of Wintrust, the successor person formed by such consolidation or into which Wintrust is merged or to which such sale, conveyance, transfer, lease or other disposition is made shall succeed to, and be substituted for, and may exercise every right and power of, Wintrust under the applicable indenture with the same effect as if such successor person had been named as the company in such indenture and thereafter the predecessor person, except in the case of a lease, shall be relieved of all obligations and covenants under the applicable indenture and the debt securities.

#### Concerning the Trustee
The applicable prospectus supplement will specify who will act as trustee under the senior indenture pursuant to which the senior debt securities will be issued. U.S. Bank Trust Company, National Association (formerly U.S. Bank National Association) will act as trustee under the subordinated indenture pursuant to which the subordinated debt securities will be issued. U.S. Bank Trust Company, National Association acts as trustee under certain of our other indentures and performs other services for us in the ordinary course of business.

#### Governing Law
The indentures and each debt security, and any claim, controversy or dispute arising under or related to the indentures and each debt security, for all purposes shall be governed by and construed in accordance with the laws of the State of New York (without regard to the conflicts of laws provisions thereof).

#### Conversion or Exchange Rights
We will set forth in the applicable prospectus supplement the terms on which debt securities of any series may be convertible into or exchangeable for common stock or other securities of ours. We will include provisions as to whether conversion or exchange is mandatory, at the option of the holder or at our option. We may include provisions pursuant to which the number of shares of common stock or other securities of ours that the holders of the debt securities of such series receive would be subject to adjustment.

#### Payment and Paying Agent
Unless otherwise indicated in the applicable prospectus supplement, we will make payment of the interest on registered debt securities of any series on any interest payment date to the persons in whose name the registered debt securities are registered at the close of business on the regular record date for the interest payment.

We will pay principal of and interest on the debt securities of any series at the office of the paying agents designated by us. We will give prompt written notice to the trustee of the name and address of any

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paying agent and any change in the name or address of any paying agent. If we fail to maintain a paying agent, the trustee shall act as such.

All funds deposited with the trustee for the payment of principal of or payment on the debt securities of any series that remain unclaimed for two years after the date upon which such principal or interest shall have become due and payable will be repaid to Wintrust upon its request. Thereafter, any right of any holder of the debt securities to such funds shall be enforceable only against Wintrust, and the trustee will have no liability therefor.

#### Description of Capital Stock
The following description of our capital stock does not purport to be complete and is qualified, in all respects, by reference to applicable Illinois law and our amended and restated articles of incorporation, as amended, which we refer to as our articles of incorporation, our amended and restated by-laws, as amended which we refer to as our by-laws, our Certificate of Designations of 7.875% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series F, which we refer to as our Series F Certificate of Designations, each of which is incorporated by reference in the registration statement of which this prospectus is part. To find out where copies of these documents can be obtained, see "Where You Can Find More Information."

#### Authorized Capital Stock
Under our articles of incorporation, we have the authority to issue 100 million shares of common stock, without par value, and 20 million shares of preferred stock, without par value (18,000 of which are designated as shares of our Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series F, which we refer to as the series F preferred). We may issue shares of any series of preferred stock that we have designated or that we may designate and issue in the future, which may include, without limitation, shares of our preferred stock that are convertible into other securities of the Company. Under our articles of incorporation, our board of directors has the authority to issue preferred stock in one or more classes or series, and to fix for each class or series the voting powers and the distinctive designations, preferences and relative, participation, optional or other special rights and such qualifications, limitations or restrictions, as may be stated and expressed in the resolution or resolutions adopted by the board of directors providing for the issuance of such class or series as may be permitted by the Illinois Business Corporation Act, or the IBCA, including dividend rates, conversion rights, terms of redemption and liquidation preferences and the number of shares constituting each such class or series, without any further vote or action by our shareholders.

The rights, preferences and privileges of holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any outstanding series of our preferred stock, including the series F preferred, and any series of preferred stock that we may designate and issue in the future.

#### Common Stock
*Common Stock Outstanding*. As of April 30, 2026, we had 67,447,756 shares of our common stock issued and outstanding. The rights, preferences and privileges of holders of our common stock are subject to, and may be adversely affected by, the rights of the holders of shares of any series of our preferred stock, including the series F preferred and any series of preferred stock that we may designate and issue in the future. Shares of Wintrust common stock may be certificated or uncertificated, as provided by the IBCA.

*Voting Rights*. Each holder of our common stock is entitled to one vote for each share held on all matters submitted to a vote of shareholders and does not have cumulative voting rights. Accordingly, holders of a majority of the shares of our common stock entitled to vote in any election of directors of the Company may elect all of the directors standing for election.

*Dividend Rights*. The holders of our common stock are entitled to receive dividends, if and when declared payable by our board of directors from any funds legally available for the payment of dividends, subject to any preferential dividend rights of our outstanding preferred stock, including the series F preferred.

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*Liquidation Rights*. Upon the liquidation, dissolution or winding up of the Company, the holders of our common stock are entitled to share pro rata in our net assets available after the payment of all debts and other liabilities and subject to the prior rights of any outstanding preferred stock of the Company, including the series F preferred.

*Absence of Other Rights*. Under our articles of incorporation, the holders of our common stock have no preemptive, subscription, redemption or conversion rights.

*Listing*. Our common stock is listed on NASDAQ under the ticker symbol "WTFC." We intend to apply to NASDAQ to list any additional shares of common stock offered hereby.

#### Series F Preferred Stock
*Series F Preferred Stock Outstanding*. As of April 30, 2026, we had 17,000 shares of series F preferred outstanding, which are represented by depositary shares, each representing a 1/1,000th interest in a share of series F preferred, which we refer to as the series F depositary shares.

*Dividends*. Non-cumulative dividends on the series F preferred are payable quarterly in arrears when, as and if declared by our board of directors at a fixed rate of 7.875% per annum from, and including, May 22, 2025 to, but excluding, July 15, 2030, and from, and including, that date at a floating rate equal to the Five-Year Treasury Rate (as defined in the Series F Certificate of Designations) plus 3.878%. With certain limited exceptions, if we do not pay full cash dividends on the series F preferred for the most recently completed dividend period, we may not pay dividends on, repurchase, redeem or make a liquidation payment with respect to, our common stock or other stock ranking junior to the series F preferred.

*Redemption*. Our series F preferred may be redeemed (i) in whole or in part, from time to time, on any dividend payment date on or after July 15, 2030, or (ii) in whole but not in part, at any time within 90 days following a Regulatory Capital Treatment Event (as defined in the Series F Certificate of Designations), in each case, at a redemption price equal to $25,000 per share, plus any declared and unpaid dividends, without accumulation of any undeclared dividends to, but excluding, the redemption date.

*Conversion*. Holders of our series F preferred shall not have any rights to convert shares of our series F preferred into, or exchange shares of our series F preferred for, shares of any other class of capital stock of the Company.

*Reorganization Events and Fundamental Transactions*. If the Company liquidates, dissolves or winds-up, either voluntarily or involuntarily, holders of series F preferred shall be entitled to receive a liquidating distribution of $25,000 per share of series F preferred, plus any declared and unpaid dividends thereon (without accumulation of any undeclared dividends) to and including the date of such liquidation, out of assets legally available for distribution to shareholders of the Company, before the Company makes any distribution of assets to the holders of our common stock or any other class or series of shares of junior stock. Distributions will be made pro rata as to our series F preferred and any other parity stock and only to the extent of the Company's assets, if any, that are available after satisfaction of all liabilities to creditors and subject to the rights of holders of any securities ranking senior to our series F preferred and any other parity stock.

*Voting Rights*. Holders of our series F preferred generally do not have any voting rights, except as required by law or as may be required by the rules of NASDAQ. However, we may not amend our articles of incorporation in a manner adverse to the rights of the holders of our series F preferred, issue capital stock ranking senior to the series F preferred or take certain other actions without the approval of the holders of the series F preferred. In addition, holders of series F preferred, together with the holders of other parity securities having similar voting rights, may elect two directors if we have not paid dividends on our series F preferred for six or more quarterly dividend periods, whether or not consecutive. Holders of series F preferred shall have one vote per share on any matter in which holders of series F preferred are entitled to vote.

#### Preferred Stock
*Blank Check Preferred Stock*. We or any selling securityholder may offer shares of any series of preferred stock that we have designated or that we may designate and issue in the future, which may include,

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without limitation, shares of our preferred stock that are convertible into other securities of the Company. Under our articles of incorporation, our board of directors has the authority to issue preferred stock in one or more classes or series, and to fix for each class or series the voting powers and the distinctive designations, preferences and relative, participation, optional or other special rights and such qualifications, limitations or restrictions, as may be stated and expressed in the resolution or resolutions adopted by the board of directors providing for the issuance of such class or series as may be permitted by the IBCA, including dividend rates, conversion rights, terms of redemption and liquidation preferences and the number of shares constituting each such class or series, without any further vote or action by our shareholders.

*Preferred Stock Offered Hereby*. If we offer or any selling securityholder offers preferred stock pursuant to this prospectus in the future, the applicable prospectus supplement will describe the terms of such preferred stock, to the extent not already described herein, including the following, where applicable:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the designation of the shares and the number of shares that constitute the series;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the dividend rate (or the method of calculating dividends), if any, on the shares of the series and the priority as to payment of dividends with respect to other classes or series of our shares of capital stock;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • whether dividends are or will be cumulative or non-cumulative and, if cumulative, the date from which dividends on the preferred stock are or will accumulate;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the dividend periods (or the method of calculating the dividend periods);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the voting rights of the preferred stock, if any;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the liquidation preference and the priority as to payment of the liquidation preference with respect to other classes or series of our capital stock and any other rights of the shares of the class or series upon our liquidation or winding-up;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • whether or not the shares of the series are or will be convertible and, if so, the security into which they are convertible and the terms and conditions of conversion, including the conversion price or the manner of determining it;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • whether or not and on what terms the shares of the series are or will be subject to redemption or repurchase at our option;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • whether the preferred stock of the series will be listed on a national securities exchange or quoted on an automated quotation system;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • a discussion of any material U.S. federal income tax considerations applicable to the preferred stock; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the other material terms, rights and privileges and any qualifications, limitations or restrictions of the rights or privileges of the series.

The description in the prospectus supplement will not necessarily be complete, and reference will be made to the certificate of designations relating to a series of preferred stock which will be or have been filed with the SEC.

#### Series F Depositary Shares
*Series F Depositary Shares Outstanding*. As of April 30, 2026, we had 17,000,000 series F depositary shares outstanding.

*Dividends and Other Distributions*. The depositary will distribute any cash dividends or other cash distributions received in respect of the deposited series F preferred to the record holders of series F depositary shares represented thereby in proportion to the number of series F depositary shares held by the holders. The depositary will distribute any property received by it other than cash to the record holders of series F depositary shares entitled to those distributions, unless it determines that the distribution cannot be made proportionally among those holders or that it is not feasible to make a distribution (including any requirement that we or the depositary withhold an amount on account of taxes). In that event, the depositary may, with our approval, adopt a method as it deems equitable and practicable for purposes of effecting the

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distribution, including selling the property (at a public or private sale) and distributing the net proceeds from the sale to the holders of the series F depositary shares in proportion to the number of series F depositary shares they hold. Record dates for the payment of dividends and other matters relating to the series F depositary shares will be the same as the corresponding record dates for the series F preferred. The amounts distributed to holders of series F depositary shares will be reduced by any amounts required to be withheld by the depositary or by us on account of taxes or other governmental charges.

*Redemption*. If we redeem the series F preferred represented by the series F depositary shares, the series F depositary shares will be redeemed from the proceeds received by the depositary resulting from the redemption of the series F preferred held by the depositary. The redemption price per series F depositary share will be equal to 1/1,000th of the redemption price per share payable with respect to the series F preferred (or $25.00 per series F depositary share), plus any declared and unpaid dividends, without accumulation of any undeclared dividends. Whenever we redeem shares of series F preferred held by the depositary, the depositary will redeem, as of the same redemption date, the number of series F depositary shares representing shares of series F preferred so redeemed. In case of any redemption of less than all of the outstanding series F depositary shares, the series F depositary shares to be redeemed will be selected by the depositary pro rata or by lot. In any such case, the depositary will redeem series F depositary shares only in increments of 100 shares and any multiple thereof.

*Liquidation Preference*. In the event that we liquidate, dissolve or wind-up our business and affairs, either voluntarily or involuntarily, each holder of a series F depositary share will be entitled to receive a liquidation distribution of $25.00 per series F depositary share, plus any declared and unpaid dividends, without accumulation of any undeclared dividends, before we make any distribution of assets to the holders of our common stock or any other class or series of stock ranking junior to the series F preferred as to that distribution.

*Voting Rights*. When the depositary receives notice of any meeting at which the holders of the series F preferred are entitled to vote, the depositary will mail (or otherwise transmit by an authorized method) the information contained in the notice to the record holders of the series F depositary shares representing the series F preferred. Each record holder of the series F depositary shares on the record date, which will be the same date as the record date for the series F preferred, may instruct the depositary to vote the amount of the series F preferred represented by the holder's series F depositary shares. To the extent possible, the depositary will vote the amount of the series F preferred represented by series F depositary shares in accordance with the instructions it receives. We will agree to take all reasonable actions that the depositary determines are necessary to enable the depositary to vote as instructed. If the depositary does not receive specific instructions from the holders of any series F depositary shares representing the series F preferred, it will vote all series F depositary shares held by it proportionately with instructions received.

*Listing*. Our series F depositary shares are listed on NASDAQ under the ticker symbol "WTFCN."

#### Depositary Shares
We may elect to issue fractional shares of preferred stock rather than full shares of preferred stock. If so, we will issue "depositary receipts" for these "depositary shares." Each depositary share will represent a fraction of a share of a particular series of preferred stock. If we issue depositary shares pursuant to this prospectus in the future, the applicable prospectus supplement will describe the terms of the depositary shares and the underlying preferred stock to which the depositary shares relate.

The description in the prospectus supplement will not necessarily be complete, and reference will be made to the deposit agreement relating to the depositary shares which will be filed with the SEC.

#### Transfer Agent and Registrar
Equiniti Trust Company, LLC is the transfer agent and registrar for our common stock. Unless the applicable prospectus supplement specifies otherwise, the transfer agent and registrar for each series of preferred stock will be Equiniti Trust Company, LLC.

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#### Certain Provisions of Our Articles of Incorporation, Our By-Laws, Illinois Law and Certain Applicable Banking Regulations That May Have an Anti-Takeover Effect
Certain provisions of our articles of incorporation, our by-laws, Illinois law and certain applicable banking regulations may have the effect of impeding the acquisition of control of the Company by means of a tender offer, a proxy fight, open-market purchases or otherwise in a transaction not approved by our board of directors.

These provisions may have the effect of discouraging a future takeover attempt that is not approved by our board of directors but which our individual shareholders may deem to be in their best interests or in which our shareholders may receive a substantial premium for their shares over then-current market prices. As a result, shareholders who might desire to participate in such a transaction may not have an opportunity to do so. Such provisions will also render the removal of our current board of directors or management more difficult.

These provisions of our articles of incorporation and our by-laws include the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our board of directors may issue additional authorized shares of our capital stock to deter future attempts to gain control of the Company, including the authority to determine the terms of any one or more series of preferred stock, such as voting rights, conversion rates and liquidation preferences. As a result of the ability to fix voting rights for a series of preferred stock, our board has the power, to the extent consistent with its fiduciary duty, to issue a series of preferred stock to persons friendly to management in order to attempt to block a merger or other transaction by which a third party seeks control, and thereby assist the incumbent board of directors and management to retain their respective positions;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our articles of incorporation do not provide for cumulative voting for any purpose, and our articles of incorporation and by-laws also provide that any action required or permitted to be taken by shareholders may be taken only at an annual or special meeting and prohibit shareholder action by written consent in lieu of a meeting; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • our articles of incorporation expressly elect to be governed by the provisions of Section 7.85 of the IBCA, as amended, which prohibits a publicly held Illinois corporation from engaging in a business combination unless, in addition to any affirmative vote required by law or the articles of incorporation of the company, the proposed business combination;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • receives the affirmative vote of the holders of at least 80% of the combined voting power of the then outstanding shares of all classes and series of the corporation entitled to vote generally in the election of directors voting together as a single class (the voting shares), and the affirmative vote of a majority of the voting shares held by disinterested shareholders;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • is approved by at least two-thirds of the disinterested directors; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • provides for consideration offered to shareholders that meets certain fair price standards and satisfies certain procedural requirements.

Such fair price standards require that the fair market value per share of the consideration offered be equal to or greater than the higher of:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the highest per share price paid by the interested shareholder during the two-year period immediately prior to the first public announcement of the proposed business combination or in the transaction by which the interested shareholder became an interested shareholder; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the fair market value per share of common stock on the first trading date after the first public announcement of the proposed business combination or on the first trading date after the date of the first public announcement that the interested shareholder has become an interested shareholder.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • For purposes of Section 7.85 of the IBCA, a disinterested director means any member of the board of directors of the corporation who:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • is neither the interested shareholder nor an affiliate or associate of the interested shareholder;

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • was a member of the board of directors prior to the time that the interested shareholder became an interested shareholder or was a director of the corporation before January 1, 1997, or was recommended to succeed a disinterested director by a majority of the disinterested directors then in office; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • was not nominated for election as a director by the interested shareholder or any affiliate or associate of the interested shareholder.

The amendment of our articles of incorporation must be approved by a majority vote of the board of directors and also by a two-thirds vote of the outstanding shares of our common stock; provided, however, that an affirmative vote of at least 85% of the outstanding voting stock entitled to vote is required to amend or repeal certain provisions of the articles of incorporation, including provisions (a) prohibiting cumulative voting rights, (b) relating to certain business combinations, (c) limiting the shareholders' ability to act by written consent, (d) regarding the minimum number of directors, (e) regarding indemnification of directors and officers by the Company and limitation of liability for directors and (f) regarding amendment of the foregoing supermajority provisions of our articles of incorporation. Our by-laws provide that the power to make, alter, amend or repeal the by-laws shall be vested in the shareholders or the board of directors by a resolution adopted by a majority of the board of directors.

The provisions described above are intended to reduce our vulnerability to takeover attempts and certain other transactions that have not been negotiated with and approved by members of our board of directors.

The ability of a third party to acquire equity securities or control of the Company is also limited under applicable banking regulations. The Bank Holding Company Act of 1956, as amended, which we refer to as the BHC Act, requires any "bank holding company" (as defined in the BHC Act) to obtain the approval of the Federal Reserve prior to acquiring more than 5% of our outstanding common stock or another class of our voting securities. Any person other than a bank holding company is required to obtain prior approval of the Federal Reserve to acquire 10% or more of our outstanding common stock or another class of our voting securities under the Change in Bank Control Act of 1978. Any holder of 25% or more of our outstanding common stock or another class of our voting securities, other than an individual, is subject to regulation as a "bank holding company" under the BHC Act. For purposes of calculating ownership thresholds under these banking regulations, bank regulators would likely at least take the position that the minimum number of shares, and could take the position that the maximum number of shares, of our common stock or another class of our voting securities (as applicable) that a holder is entitled to receive pursuant to securities convertible into or settled in our common stock or another class of our voting securities (as applicable), including pursuant to any warrants to purchase our common stock or another class of our voting securities held by such holder, must be taken into account in calculating a shareholder's aggregate holdings of our outstanding common stock or another class of our voting securities.

#### Description of Stock Purchase Contracts and Stock Purchase Units
We may issue stock purchase contracts pursuant to which holders will purchase from us a number of shares of common stock at a future date, which we refer to as stock purchase contracts. The price per share of common stock and number of shares of common stock may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific formula set forth in the stock purchase contracts. The stock purchase contracts may be issued separately or as a part of units consisting of a stock purchase contract and securities of the Company or of third parties, including U.S. Treasury securities, securing the holders' obligations to purchase the common stock under the stock purchase contracts, which we refer to as stock purchase units. Material U.S. federal income tax considerations applicable to the stock purchase units and the stock purchase contracts will also be discussed in the applicable prospectus supplement.

The stock purchase contracts may require holders to secure their obligations thereunder in a specified manner and, in certain circumstances, we may deliver newly issued prepaid stock purchase contracts upon release to a holder of any collateral securing such holder's obligations under the original stock purchase contract. The stock purchase contracts also may require us to make periodic payments to the holders of the stock purchase units or vice-versa, and such payments may be unsecured or prefunded on some basis.

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The applicable prospectus supplement will describe the terms of any stock purchase contracts or stock purchase units, and, if applicable, prepaid stock purchase contracts. The description in the prospectus supplement will not necessarily be complete, and reference will be made to the stock purchase contracts, and, if applicable, collateral or depositary arrangements, relating to the stock purchase contracts or stock purchase units.

#### Description of Warrants
We may issue warrants to purchase debt securities, common stock or preferred stock of the Company. We may issue warrants independently or together with other securities. Warrants sold with other securities may be attached to or separate from those securities. We will issue warrants under one or more warrant agreements between us and a warrant agent that we will name in the applicable prospectus supplement. We use the term "warrant agreement" to refer to any of these warrant agreements. We use the term "warrant agent" to refer to the warrant agent under any of these warrant agreements.

We will describe in the applicable prospectus supplement relating to any warrants we are offering the specific terms relating to the offering, which terms may include some or all of the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the title of the warrants;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the offering price and aggregate number of warrants offered;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the designation, number and terms of the debt securities, common stock or preferred stock that can be purchased if a holder exercises the warrant and procedures by which those numbers may be adjusted;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the exercise price of the warrants;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the terms of any rights to redeem or call the warrants;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the dates or periods during which the warrants are exercisable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the designation and terms of any securities with which the warrants are issued;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • if the warrants are issued as a unit with another security, the date on and after which the warrants and the other security will be separately transferable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • if the exercise price is not payable in U.S. dollars, the foreign currency, currency unit or composite currency in which the exercise price is denominated;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any minimum or maximum amount of warrants that may be exercised at any one time;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any terms relating to the modification of the warrants; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any terms, procedures and limitations relating to the transferability, exchange or exercise of the warrants.

The description in the applicable prospectus supplement will not necessarily be complete, and reference will be made to the warrant agreements which will be filed with the SEC.

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#### BOOK-ENTRY SYSTEM
Unless we indicate differently in any applicable prospectus supplement or free writing prospectus, the Depository Trust Company, which we refer to as DTC, New York, New York, will act as securities depository for the securities offered hereunder (the Offered Securities). The Offered Securities will be issued as fully-registered securities registered in the name of Cede & Co. (DTC's partnership nominee) or such other name as may be requested by an authorized representative of DTC. One fully-registered Offered Security certificate will be issued for each issue of the Offered Securities, each in the aggregate principal amount of such issue, and will be deposited with DTC. If, however, the aggregate principal amount of any issue exceeds $500 million, one certificate will be issued with respect to each $500 million of principal amount, and an additional certificate will be issued with respect to any remaining principal amount of such issue.

DTC is a limited-purpose trust company organized under the New York Banking Law, a "banking organization" within the meaning of the New York Banking Law, a member of the Federal Reserve System, a "clearing corporation" within the meaning of the New York Uniform Commercial Code, and a "clearing agency" registered pursuant to the provisions of Section 17A of the Exchange Act. DTC holds securities that its participants, which we refer to as Direct Participants, deposit with DTC. DTC also facilitates the post-trade settlement among Direct Participants of sales and other securities transactions in deposited securities, through electronic computerized book-entry transfers and pledges between Direct Participants' accounts. This eliminates the need for physical movement of securities certificates. Direct Participants include both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. DTC is a wholly-owned subsidiary of The Depository Trust & Clearing Corporation, which we refer to as DTCC. DTCC is the holding company for DTC, National Securities Clearing Corporation and Fixed Income Clearing Corporation, all of which are registered clearing agencies. DTCC is owned by the users of its regulated subsidiaries. Access to the DTC system is also available to others such as both U.S. and non-U.S. securities brokers and dealers, banks, trust companies, and clearing corporations that clear through or maintain a custodial relationship with a Direct Participant, either directly or indirectly, which we refer to as Indirect Participants. The DTC rules applicable to its Direct Participants and Indirect Participants are on file with the SEC. More information about DTC can be found at www.dtcc.com.

Purchases of Offered Securities under the DTC system must be made by or through Direct Participants, which will receive a credit for the Offered Securities on DTC's records. The ownership interest of each actual purchaser of each Offered Security, which we refer to as the Beneficial Owner, is in turn to be recorded on the Direct and Indirect Participants' records. Beneficial Owners will not receive written confirmation from DTC of their purchase. Beneficial Owners are, however, expected to receive written confirmations providing details of the transaction, as well as periodic statements of their holdings, from the Direct Participants or Indirect Participant through which the Beneficial Owner entered into the transaction. Transfers of ownership interests in the Offered Securities are to be accomplished by entries made on the books of Direct Participants and Indirect Participants acting on behalf of Beneficial Owners. Beneficial Owners will not receive certificates representing their ownership interests in Offered Securities, except in the event that use of the book-entry system for the Offered Securities is discontinued.

To facilitate subsequent transfers, all Offered Securities deposited by Direct Participants with DTC will be registered in the name of DTC's partnership nominee, Cede & Co., or such other name as may be requested by an authorized representative of DTC. The deposit of Offered Securities with DTC and their registration in the name of Cede & Co. or such other DTC nominee do not affect any change in beneficial ownership. DTC has no knowledge of the actual Beneficial Owners of the Offered Securities; DTC's records reflect only the identity of the Direct Participants to whose accounts such Offered Securities are credited, which may or may not be the Beneficial Owners. The Direct Participants and Indirect Participants will remain responsible for keeping account of their holdings on behalf of their customers.

Conveyance of notices and other communications by DTC to Direct Participants, by Direct Participants to Indirect Participants, and by Direct Participants and Indirect Participants to Beneficial Owners will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time. Beneficial Owners of Offered Securities may wish to take certain steps to augment the transmission to them of notices of significant events with respect to the Offered Securities, such as redemptions, tenders, defaults and proposed amendments to the Offered Security documents. For example, Beneficial Owners of Offered Securities may wish to ascertain that the nominee holding the Offered Securities

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for their benefit has agreed to obtain and transmit notices to Beneficial Owners. In the alternative, Beneficial Owners may wish to provide their names and addresses to the registrar and request that copies of notices be provided directly to them.

Redemption notices shall be sent to DTC. If less than all of the Offered Securities within an issue are being redeemed, DTC's practice is to determine by lot the amount of the interest of each Direct Participant in such issue to be redeemed.

Neither DTC nor Cede & Co. (nor any other DTC nominee) will consent or vote with respect to Offered Securities unless authorized by a Direct Participant in accordance with DTC's Money Market Instrument Procedures. Under its usual procedures, DTC mails an Omnibus Proxy to the applicable Registrant as soon as possible after the record date. The Omnibus Proxy assigns Cede & Co.'s consenting or voting rights to those Direct Participants to whose accounts Offered Securities are credited on the record date (identified in a listing attached to the Omnibus Proxy).

Redemption proceeds, distributions and dividend payments on the Offered Securities will be made to Cede & Co., or such other nominee as may be requested by an authorized representative of DTC. DTC's practice is to credit Direct Participants' accounts upon DTC's receipt of funds and corresponding detail information from the applicable Registrant or the agent, on payable date in accordance with their respective holdings shown on DTC's records. Payments by participants to Beneficial Owners will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers in bearer form or registered in "street name," and will be the responsibility of such participant and not of DTC, the agent or the applicable Registrant, subject to any statutory or regulatory requirements as may be in effect from time to time. Payment of redemption proceeds, distributions and dividend payments to Cede & Co. (or such other nominee as may be requested by an authorized representative of DTC) is the responsibility of the applicable Registrant or the agent, disbursement of such payments to Direct Participants will be the responsibility of DTC, and disbursement of such payments to the Beneficial Owners will be the responsibility of Direct Participants and Indirect Participants.

In the event of an offer to purchase outstanding Offered Securities, a Beneficial Owner shall give notice to elect to have its Offered Securities purchased or tendered, through its participant, to the tender or remarketing agent, and shall effect delivery of such Offered Securities by causing the Direct Participant to transfer such participant's interest in the Offered Securities, on DTC's records, to the tender or remarketing agent. The requirement for physical delivery of Offered Securities in connection with an optional tender or a mandatory purchase will be deemed satisfied when the ownership rights in the Offered Securities are transferred by Direct Participants on DTC's records and followed by a book-entry credit of tendered Offered Securities to the tender or remarketing agent's DTC account. Holders of our outstanding preferred stock or subordinated notes should not expect the Company to redeem or repurchase such instruments prior to their maturity.

DTC may discontinue providing its services as depository with respect to the Offered Securities at any time by giving reasonable notice to the applicable Registrant or the agent. Under such circumstances, in the event that a successor depository is not obtained, Offered Security certificates are required to be printed and delivered.

The applicable Registrant may decide to discontinue use of the system of book-entry-only transfers through DTC (or a successor securities depository). In that event, Offered Security certificates will be printed and delivered to DTC.

The information in this section concerning DTC and DTC's book-entry system has been obtained from sources that each Registrant believes to be reliable, but no Registrant takes any responsibility for the accuracy thereof.

Neither the Company, the trustee nor their respective agents are responsible for the performance by DTC or its Direct Participants or Indirect Participants of their obligations under the rules and procedures governing their operations.

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#### PLAN OF DISTRIBUTION
We and any selling securityholder may sell the securities covered by this prospectus inside and outside the United States from time to time (a) through underwriters or dealers, (b) directly to one or more purchasers, including our affiliates, (c) through agents or (d) through a combination of any of these methods.

Selling securityholders will act independently of us in making decisions with respect to the timing, manner and size of each sale of securities. In addition to selling securities under this prospectus, selling securityholders may transfer their securities in other ways not involving market makers or established trading markets, including directly by gift, distribution or other transfer. Moreover, selling securityholders may decide not to sell any securities offered hereby.

The terms of the offering of securities with respect to which this prospectus is being delivered will be set forth in the applicable prospectus supplement, if required, pursuant to Rule 424(b) under the Securities Act. Such supplement may describe, among other things:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the type and terms of the securities being offered;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the names of any selling securityholders, if applicable;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the names of any underwriters, dealers or agents and the number of securities underwritten or purchased by each;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the purchase price of the securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the proceeds we will receive from the sale of the securities;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • the names of the securities exchanges, if any, on which the securities are listed;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any over-allotment options under which underwriters may purchase additional securities from us;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any underwriting discounts, commissions, agency fees and other items constituting compensation to underwriters or agents;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any initial public offering price;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any discounts or concessions allowed or reallowed or paid to dealers; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; • any commissions paid to agents and any delayed delivery arrangements.

Any securities covered by this prospectus which qualify for sale pursuant to Rule 144 or Rule 144A promulgated under the Securities Act may be sold under Rule 144 or Rule 144A in certain instances, rather than pursuant to this prospectus. In addition, we and any selling securityholder may transfer the securities by other means not described in this prospectus.

#### General
Underwriters, dealers, agents and remarketing firms that participate in the distribution of the offered securities may be deemed to be "underwriters" within the meaning of the Securities Act. Any discounts or commissions they receive from us or selling securityholders and any profits they receive on the sale or resale of the offered securities may be considered by the SEC to be underwriting discounts and commission under the Securities Act. We will identify any underwriters, agents or dealers and describe their commissions, fees or discounts in the applicable prospectus supplement.

This prospectus, together with any applicable prospectus supplement, may also be used by our affiliate in connection with offers and sales of the securities in market-making transactions at negotiated prices related to prevailing market prices at the time of sale. Such affiliates may act as principals or agents in such transactions. None of our affiliates have any obligation to make a market in the securities, and each may discontinue any market-making activities at any time, without notice, at its sole discretion.

#### Sale Through Underwriters or Dealers
If we use or a selling securityholder uses underwriters in a sale of securities, such underwriters will acquire the offered securities for their own account and may resell the securities from time to time in one or

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more transactions, including negotiated transactions. These sales will be made at a fixed public offering price or at varying prices determined at the time of the sale.

We or any selling securityholder may offer the securities to the public through an underwriting syndicate, represented by managing underwriters, or through one or more underwriters acting alone. Unless the applicable prospectus supplement states otherwise, the obligations of the underwriters to purchase the offered securities will be subject to certain conditions precedent, and the underwriters will be obligated to purchase all of the securities of the series offered if any of the securities are purchased, unless the applicable prospectus supplement states otherwise. Any initial public offering price and any discounts or concessions allowed, re-allowed or paid to dealers may be changed from time to time.

If we use or a selling securityholder uses dealers in a sale of securities, we or such selling securityholder will sell the securities to them as principals, and they may then resell those securities to the public from time to time in one or more transactions at varying prices determined by the dealers at the time of resale. We will include in the applicable prospectus supplement the names of the dealers and the terms of the transaction.

#### Direct Sales and Sales Through Agents and Others
We or any selling securityholder may choose to sell the offered securities directly. In this case, no underwriters or agents would be involved. We or any selling securityholder may also sell the securities through agents designated from time to time. We will name any agent involved in the offer or sale of the offered securities and describe any commissions payable by us or any selling securityholder to the agent in the applicable prospectus supplement. Unless we inform you otherwise in the prospectus supplement, any agent will agree to use its best efforts to solicit purchases for the period of its appointment.

We or any selling securityholder may sell the securities directly to institutional investors or others who may be deemed to be underwriters within the meaning of the Securities Act with respect to any sale of those securities. We will describe the terms of any such sales in the applicable prospectus supplement.

#### Delayed Delivery Contracts
If we so indicate in the applicable prospectus supplement, we or any selling securityholder may authorize agents, underwriters or dealers to solicit offers from certain types of institutions to purchase securities from us or such selling securityholder at the public offering price under delayed delivery contracts. These contracts would provide for payment and delivery on a specified date in the future. The contracts would be subject only to those conditions described in the applicable prospectus supplement. The prospectus supplement will describe the commission payable for solicitation of those contracts.

#### Indemnification
We or a selling securityholder may have agreements with agents, underwriters, dealers and remarketing firms and each of their respective affiliates to indemnify them against certain civil liabilities, including liabilities under the Securities Act or to contribute with respect to payments which the underwriters, dealers, agents or remarketing firms may be required to make. Agents, underwriters, dealers and remarketing firms, and their affiliates, may engage in transactions with, or perform services for, us in the ordinary course of business. This includes commercial banking and investment banking transactions.

#### Market Making, Stabilization and Other Transactions
Unless the applicable prospectus supplement states otherwise, each series of offered securities, other than shares of our common stock that are listed on NASDAQ, will be a new issue and will have no established trading market. We may elect to list any of the securities of on one or more exchanges, but unless otherwise specified in the applicable prospectus supplement, we shall not be obligated to do so. Any underwriters that are used in the sale of offered securities may make a market in such securities, but may discontinue such market making at any time without notice. Therefore, we cannot assure you that the securities will have a liquid trading market.

In connection with the distribution of the securities offered under this prospectus, we may enter into swap or other hedging transactions with, or arranged by, underwriters or agents and their affiliates.

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Any underwriter may engage in over-allotment, stabilizing transactions, syndicate covering transactions and penalty bids in accordance with Rule 104 under the Exchange Act.

Over-allotment involves sales in excess of the offering size, which create a short position. Stabilizing transactions permit bids to purchase the underlying security so long as the stabilizing bids do not exceed a specified maximum. Syndicate covering transactions involve purchases of the securities in the open market after the distribution has been completed in order to cover syndicate short positions. Penalty bids permit the underwriters to reclaim a selling concession from a syndicate member when the securities originally sold by the syndicate member are purchased in a syndicate covering transaction to cover syndicate short positions. These over-allotments, stabilizing transactions, syndicate covering transactions and penalty bids may cause the price of the securities to be higher than it would be in the absence of the transactions. The underwriters may, if they commence these transactions, discontinue them at any time.

#### LEGAL MATTERS
The validity of the debt securities, common stock, warrants, preferred stock, depositary shares, stock purchase contracts and stock purchase units will be passed upon for Wintrust by Sidley Austin LLP, Chicago, Illinois.

#### EXPERTS
The consolidated financial statements of Wintrust Financial Corporation appearing in Wintrust Financial Corporation's [Annual Report (Form 10-K) for the year ended December 31, 2025](https://www.sec.gov/ix?doc=/Archives/edgar/data/1015328/000101532826000007/wtfc-20251231.htm), and the effectiveness of Wintrust Financial Corporation's internal control over financial reporting as of December 31, 2025, have been audited by Ernst & Young LLP, independent registered public accounting firm, as set forth in their reports thereon, included therein and incorporated herein by reference. Such consolidated financial statements are incorporated herein by reference in reliance upon such reports given on the authority of such firm as experts in accounting and auditing.

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#### PART II INFORMATION NOT REQUIRED IN PROSPECTUS

#### Item 14. Other Expenses of Issuance and Distribution
The following table sets forth the estimated expenses in connection with the offering described in this registration statement:

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| | |
|:---|:---|
| SEC registration fee  | $\* |
| Printing fees and expenses  | \*\* |
| Legal fees and expenses  | \*\* |
| Trustee fees and expenses  | \*\* |
| Rating agencies' fees and expenses  | \*\* |
| Accountants' fees and expenses  | \*\* |
| Miscellaneous expenses  | \*\* |
| Total  | $\*\* |

---

\*

In accordance with Rules 456(b) and 457(r), we are deferring payment of the registration fee for the securities offered by this prospectus.

\*\*

These fees are calculated based on the number of issuances and amount of securities offered and accordingly cannot be estimated at this time.

#### Item 15. Indemnification of Directors and Officers

#### Illinois Business Corporation Act
Section 8.75 of the Illinois Business Corporation Act, as amended, which we refer to as the IBCA, provides generally and in pertinent parts that an Illinois corporation may indemnify its directors, officers, employees and agents, or anyone serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (in the case of actions by or in the right of the corporation) or against expenses, judgments, fines and settlements (in all other cases) actually and reasonably incurred by them in connection with any action, suit, or proceeding if, in connection with the matters in issue, they acted in good faith and in a manner they reasonably believed to be in, or not opposed to, the best interests of the corporation and, in connection with any criminal suit or proceeding, if in connection with the matters in issue, they had no reasonable cause to believe their conduct was unlawful, provided that no indemnification shall be made with respect to any claim, issue or matter as to which such person has been adjudged to have been liable to the corporation, unless and only to the extent that the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability, such person is fairly and reasonably entitled to indemnity. If a present or former director, officer or employee of an Illinois corporation has been successful in the defense of any such action, suit or proceeding, claim, issue or matter, such person shall be indemnified by the corporation against expenses if, in connection with the matters in issue, they acted in good faith and in a manner they reasonably believed to be in, or not opposed to, the best interests of the corporation.

Section 8.75 of the IBCA further permits an Illinois corporation to pay expenses incurred by an officer or director in defending a civil or criminal action, suit or proceeding in advance of the final disposition of such action, suit or proceeding if the director or officer undertakes to repay such amount if it is ultimately determined that such person is not entitled to be indemnified by the corporation. An Illinois corporation may also grant additional indemnification through its by-laws, agreements, votes of shareholders or disinterested directors, or otherwise, and may purchase and maintain insurance on behalf of any indemnifiable person against any liability asserted against such person and incurred by such person in his or her capacity as an indemnifiable person whether or not the corporation would have the power to indemnify such person against liability under the terms of Section 8.75 of the IBCA.

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#### Our Articles of Incorporation and By-laws
Article NINE of our amended and restated articles of incorporation, as amended, which we refer to as our articles of incorporation, and Article VI of our amended and restated by-laws, as amended, which we refer to as our by-laws, provide that we shall, to the full extent permitted by law, indemnify those persons whom we may indemnify pursuant thereto, and contain provisions substantially similar to Section 8.75 of the IBCA. The foregoing description of our articles of incorporation and by-laws are qualified in their entirety by reference to such documents, which are listed as Exhibits 4.1 and 4.3 hereto and incorporated by reference herein.

#### Indemnification Agreements
We have entered into individual indemnification agreements with each of our non-employee directors and certain of our executive officers, which we refer to collectively as the Indemnification Agreements, which implement with more specificity the indemnification provisions provided by our by-laws and provide, among other things, that to the fullest extent permitted by applicable law, we will indemnify such director or officer against any and all losses, expenses and liabilities arising out of such director's or officer's service as a director or officer of the Company, as the case may be. The Indemnification Agreements also contain detailed provisions concerning expense advancement and reimbursement. The Indemnification Agreements are in addition to any other rights each non-employee director or officer may be entitled to under our articles of incorporation, by-laws and applicable law.

#### Directors' and Officers' Liability Insurance
We maintain insurance policies under which our directors and officers are insured, within the limits and subject to the limitations of the policies, against certain expenses in connection with the defense of actions, suits or proceedings, and certain liabilities which might be imposed as a result of such actions, suits or proceedings, to which they are parties by reason of being or having been such directors or officers.

#### Item 16. Exhibits

---

| | |
|:---|:---|
| **Exhibit <br> No.**  | **Description**  |
| &nbsp;&nbsp; 1.1\* | Form of Underwriting Agreement for Offered Securities. |
| &nbsp;&nbsp; 4.1 | Amended and Restated Articles of Incorporation of Wintrust Financial Corporation, as amended (incorporated by reference to [Exhibit 3.1](https://www.sec.gov/Archives/edgar/data/1015328/000095013706008920/c07652exv3w1.htm) of the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2006, Exhibits [3.1](https://www.sec.gov/Archives/edgar/data/1015328/000095012311070338/c656148kexv3w1.htm) and [3.2](https://www.sec.gov/Archives/edgar/data/1015328/000095012311070338/c656148kexv3w2.htm) of the Company's Current Report on Form 8-K filed with the Securities and Exchange Commission on July 29, 2011 and [Exhibit 3.1](https://www.sec.gov/Archives/edgar/data/1015328/000119312512346293/d359472dex31.htm) of the Company's Quarterly Report on Form 10-Q for the quarter ended June 30, 2012). |
| &nbsp;&nbsp; 4.2 | [Certificate of Designations of Wintrust Financial Corporation 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).](https://www.sec.gov/Archives/edgar/data/1015328/000110465925048536/tm2515112d1_ex3-1.htm) |
| &nbsp;&nbsp; 4.3 | [Amended and Restated By-laws of Wintrust Financial Corporation, 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).](https://www.sec.gov/Archives/edgar/data/1015328/000110465924084675/tm2420533d1_ex3-1.htm) |
| &nbsp;&nbsp; 4.4 | [Form of Senior Indenture (incorporated by reference to Exhibit 4.1 of the Company's Registration Statement on Form S-3 filed with the Securities and Exchange Commission on June 9, 2014).](https://www.sec.gov/Archives/edgar/data/1015328/000101532814000126/exhibit41-formofseniorinde.htm) |
| &nbsp;&nbsp; 4.5 | [Form of Subordinated Indenture (incorporated by reference to Exhibit 4.5 of the Company's Registration Statement on Form S-3 filed with the Securities and Exchange Commission on May 6, 2020).](https://www.sec.gov/Archives/edgar/data/1015328/000104746920002834/a2241540zex-4_5.htm) |
| &nbsp;&nbsp; 4.6\* | Form of Senior Debt Security. |
| &nbsp;&nbsp; 4.7\* | Form of Subordinated Debt Security. |

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| | |
|:---|:---|
| **Exhibit <br> No.**  | **Description**  |
| &nbsp;&nbsp; 4.8\* | Form of Certificate of Designations for preferred stock (together with form of preferred stock certificate). |
| &nbsp;&nbsp; 4.9\* | Form of Deposit Agreement. |
| &nbsp;&nbsp; 4.10\* | Form of Purchase Contract Agreement. |
| &nbsp;&nbsp; 4.11\* | Form of Warrant Agreement (together with form of warrant certificate). |
| &nbsp;&nbsp; 4.12\* | Form of Stock Purchase Unit Agreement. |
| &nbsp;&nbsp; 5.1 | [Opinion of Sidley Austin LLP.](tm2613073d2_ex5-1.htm)  |
| 23.1 | [Consent of Ernst & Young LLP.](tm2613073d2_ex23-1.htm)  |
| 23.2 | [Consent of Sidley Austin LLP (set forth in Exhibit 5.1).](tm2613073d2_ex5-1.htm)  |
| 24.1 | [Powers of Attorney (included on the signature pages of this registration statement).](#tPOA)  |
| 25.1\*\*  | Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as amended, of trustee with respect to the Senior Debt Securities under the Senior Indenture. |
| 25.2 | [Statement of Eligibility on Form T-1 under the Trust Indenture Act of 1939, as amended, of U.S. Bank Trust Company, National Association, as trustee with respect to the Subordinated Debt Securities under the Subordinated Indenture.](tm2613073d2_ex25-2.htm) |
| 107 | [Filing Fee Table.](tm2613073d1_ex-filingfees.htm)  |

---

\*

To be filed by amendment or as an exhibit to a document to be incorporated or deemed to be incorporated by reference herein, if applicable.

\*\*

To be filed pursuant to Section 305(b)(2) of the Trust Indenture Act of 1939, as amended, as applicable.

#### Item 17. Undertakings
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (a) The undersigned registrant hereby undertakes:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1) To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (ii) To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Securities and Exchange Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (iii) To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

provided, however, that paragraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Securities and Exchange Commission by the registrant pursuant to section 13 or section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (4) That, for the purpose of determining liability under the Securities Act to any purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (i) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (5) That, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission

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such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (d) The undersigned registrant hereby undertakes to file an application for the purpose of determining the eligibility of the trustee to act under subsection (a) of Section 310 of the Trust Indenture Act in accordance with the rules and regulations prescribed by the Securities and Exchange Commission under Section 305(b)(2) of the Trust Indenture Act.

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#### SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Rosemont, State of Illinois, on the 7th day of May 2026.

#### WINTRUST FINANCIAL CORPORATION
By:

/s/ KATHLEEN M. BOEGE

Name:

Kathleen M. Boege

Title:

Executive Vice President, Chief Legal Officer and Corporate Secretary

#### POWERS OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears immediately below constitutes and appoints each of David A. Dykstra, David L. Stoehr and Kathleen M. Boege, and any of them, with full power to act without the other, his or her true and lawful attorneys-in-fact and agent, with full and several power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement on Form S-3, and to sign any related registration statement that is to be effective upon filing pursuant to Rule 462(b) promulgated under the Securities Act, and all post-effective amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the SEC, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and to perform each and every act and thing requisite, necessary and/or desirable to be done in and about the premises, as fully to all intents and purposes as they, he or she might do or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their, his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

This Power of Attorney shall not revoke any powers of attorney previously executed by the undersigned. This Power of Attorney shall not be revoked by any subsequent power of attorney that the undersigned may execute, unless such subsequent power of attorney specifically provides that it revokes this Power of Attorney by referring to the date of the undersigned's execution of this Power of Attorney. For the avoidance of doubt, whenever two or more powers of attorney granting the powers specified herein are valid, the agents appointed on each shall act separately unless otherwise specified.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed on May 7, 2026 by the following persons in the capacities indicated.

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| | |
|:---|:---|
| **Signature**  | **Title**  |
| /s/ H. Patrick Hackett, Jr. <br>H. Patrick Hackett, Jr.  | Chairman of the Board of Directors |
| /s/ Timothy S. Crane <br>Timothy S. Crane  | President, Chief Executive Officer and Director (Principal Executive Officer) |
| /s/ David L. Stoehr <br>David L. Stoehr  | Executive Vice President and Chief Financial Officer (Principal Financial Officer) |
| /s/ Jeffrey D. Hahnfeld <br>Jeffrey D. Hahnfeld  | Executive Vice President, Controller and Chief Accounting Officer (Principal Accounting Officer) |

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| | |
|:---|:---|
| **Signature**  | **Title**  |
| /s/ Elizabeth H. Connelly <br>Elizabeth H. Connelly  | Director |
| /s/ Peter D. Crist <br>Peter D. Crist  | Director |
| /s/ William J. Doyle <br>William J. Doyle  | Director |
| /s/ Marla F. Glabe <br>Marla F. Glabe  | Director |
| /s/ Brian A. Kenney <br>Brian A. Kenney  | Director |
| /s/ Laura A. Kohl <br>Laura A. Kohl  | Director |
| /s/ Deborah L. Hall Lefevre <br>Deborah L. Hall Lefevre  | Director |
| /s/ Suzet M. McKinney <br>Suzet M. McKinney  | Director |
| /s/ David S. Richter <br>David S. Richter  | Director |
| /s/ Gregory A. Smith <br>Gregory A. Smith  | Director |
| /s/ Karin Gustafson Teglia <br>Karin Gustafson Teglia  | Director |
| /s/ Alex E. Washington, III <br>Alex E. Washington, III  | Director |

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## Exhibit 5.1

**Exhibit 5.1** 

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| | |
|:---|:---|
| ![](tm2613073d2_ex5-1img01.jpg) | Sidley Austin LLP <br> One South Dearborn Street<br> Chicago, IL 60603<br> +1 312 853 7000<br> +1 312 853 7036<br>AMERICA • ASIA PACIFIC • EUROPE |

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May 7, 2026

Wintrust Financial Corporation<br> 9700 W. Higgins Road, Suite 800<br> Rosemont, Illinois 60018

Re: <u>Registration Statement on Form S-3</u>

Ladies and Gentlemen:

We refer to the Registration Statement on Form S-3 (the "<u>Registration Statement</u>") being filed by Wintrust Financial Corporation, an Illinois corporation (the "<u>Company</u>"), with the Securities and Exchange Commission (the "<u>SEC</u>") under the Securities Act of 1933, as amended (the "<u>Securities Act</u>"), relating to the registration of an unlimited amount of:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) shares of the Company's common stock, no par value (the "<u>Common Stock</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) shares of the Company's preferred stock, no par value (the "<u>Preferred Stock</u>"), which may be represented by depositary shares (the "<u>Depositary Shares</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) one or more series of debt securities of the Company (the "<u>Debt Securities</u>"), which may be unsecured senior debt securities (the "<u>Senior Debt Securities</u>") and/or unsecured subordinated debt securities (the "<u>Subordinated Debt Securities</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) warrants to purchase Common Stock, Preferred Stock or Debt Securities (the "<u>Warrants</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) stock purchase contracts (the "<u>Stock Purchase Contracts</u>") entitling or obligating the holders thereof to purchase from or sell to the Company and the Company to sell to or purchase from the holders thereof Common Stock at a future date or dates; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vi) stock purchase units (the "<u>Stock Purchase Units</u>"), each representing ownership of a Stock Purchase Contract and securities of the Company or of third parties, including U.S. Treasury securities, securing the holders' obligations to purchase the Common Stock under the Stock Purchase Contracts.

The Common Stock, the Preferred Stock, the Depositary Shares, the Debt Securities, the Warrants, the Stock Purchase Contracts and the Stock Purchase Units are collectively referred to herein as the "<u>Securities</u>."

Sidley Austin LLP is a limited liability partnership practicing in affiliation with other Sidley Austin partnerships.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

Unless otherwise specified in the applicable prospectus supplement:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) the Depositary Shares will be issued under a deposit agreement (a "<u>Deposit Agreement</u>") between the Company and a depositary agent (the "<u>Depositary Agent</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) the Senior Debt Securities will be issued under one or more indentures (each, a "<u>Senior Indenture</u>") to be entered into between the Company and a trustee (the "<u>Senior Trustee</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) the Subordinated Debt Securities will be issued under one or more indentures (each, a "<u>Subordinated Indenture</u>") to be entered into between the Company and U.S. Bank Trust Company, National Association or the trustee designated therein (the "<u>Subordinated Trustee</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) the Warrants will be issued under a warrant agreement (the "<u>Warrant Agreement</u>") to be entered into between the Company and a warrant agent (the "<u>Warrant Agent</u>");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(5) the Stock Purchase Contracts will be issued under a stock purchase contract agreement (the "<u>Stock Purchase Contract Agreement</u>") between the Company and a stock purchase contract agent (the "<u>Stock Purchase Contract Agent</u>"); and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(6) the Stock Purchase Units will be issued under one or more agreements (each, a "<u>Unit Agreement</u>") to be entered into between the Company and a unit agent (the "<u>Unit Agent</u>");

in each case, substantially in the form that has been or will be filed and incorporated by reference as an exhibit to the Registration Statement.

This opinion letter is being delivered in accordance with the requirements of Item 601(b)(5) of Regulation S-K under the Securities Act.

We have examined the Registration Statement, the exhibits thereto, the amended and restated articles of incorporation of the Company, as amended to the date hereof (the "<u>Charter</u>"), the amended and restated by-laws of the Company, as amended to the date hereof (the "<u>By-Laws</u>"), and the resolutions (the "<u>Resolutions</u>") adopted by the board of directors of the Company (the "<u>Board</u>") relating to the Registration Statement. We have also examined originals, or copies of originals certified to our satisfaction, of such agreements, documents, certificates and statements of the Company and others, and have examined such questions of law, as we have considered relevant and necessary as a basis for this opinion letter. We have assumed the authenticity of all documents submitted to us as originals, the genuineness of all signatures, the legal capacity of all persons and the conformity with the original documents of any copies thereof submitted to us for examination. As to facts relevant to the opinions expressed herein, we have relied without independent investigation or verification upon, and assumed the accuracy and completeness of, certificates, letters and oral and written statements and representations of public officials and officers and other representatives of the Company.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

Based on and subject to the foregoing and the other limitations, qualifications and assumptions set forth herein, we are of the opinion that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. With respect to an offering of shares of Common Stock covered by the Registration Statement, such shares of Common Stock will be validly issued, fully paid and nonassessable when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act; (ii) a prospectus supplement with respect to the sale of such shares of Common Stock shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) the Board or a duly authorized committee thereof shall have duly adopted final resolutions in conformity with the Charter, the By-Laws and the Resolutions authorizing the issuance and sale of such shares of Common Stock; and (iv) the certificates, if any, representing such shares of Common Stock shall have been duly executed, countersigned and registered and duly delivered in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof against payment of the agreed consideration therefor or, if any shares of Common Stock are to be issued in uncertificated form, the Company's books shall reflect the issuance of such shares of Common Stock in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof upon payment of the agreed consideration therefor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. The issuance and sale of each series of Preferred Stock covered by the Registration Statement will be duly authorized, and each share of such series of Preferred Stock will be validly issued, fully paid and nonassessable, when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act; (ii) a prospectus supplement with respect to the sale of such series of Preferred Stock shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) the Board or a duly authorized committee thereof shall have duly adopted final resolutions in conformity with the Charter, the By-Laws and the Resolutions establishing the designations, preferences, rights, qualifications, limitations or restrictions of such series of Preferred Stock and authorizing the issuance and sale of such series of Preferred Stock; (iv) the Company shall have filed with the Secretary of State of the State of Illinois a statement duly executed on behalf of the Company with respect to such series of Preferred Stock in accordance with the Illinois Business Corporation Act (the "<u>IBCA</u>") and in conformity with the Charter and such final resolutions; and (v) the certificates, if any, representing such series of Preferred Stock shall have been duly executed, countersigned and registered and duly delivered in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof against payment of the agreed consideration therefor or, if any shares of such series of Preferred Stock are to be issued in uncertificated form, the Company's books shall reflect the issuance of such shares of such series of Preferred Stock in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof upon payment of the agreed consideration therefor.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. The Depositary Shares covered by the Registration Statement will entitle the holders thereof to the rights specified in the Depositary Shares and the Deposit Agreement relating to the Depositary Shares when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act; (ii) a prospectus supplement with respect to the sale of such Depositary Shares and the series of Preferred Stock underlying such Depositary Shares shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) a Deposit Agreement relating to such Depositary Shares shall have been duly authorized, executed and delivered by the Company and duly executed and delivered by the Depositary Agent named in the Deposit Agreement; (iv) the Board or a duly authorized committee thereof shall have duly adopted final resolutions in conformity with the Charter, the By-Laws and the Resolutions establishing the designations, preferences, rights, qualifications, limitations or restrictions of such series of Preferred Stock underlying such Depositary Shares and authorizing the issuance and sale of such series of Preferred Stock; (v) the Company shall have filed with the Secretary of State of the State of Illinois a statement duly executed on behalf of the Company with respect to such series of Preferred Stock underlying such Depositary Shares in accordance with the IBCA and in conformity with the Charter and such final resolutions; (vi) the certificates, if any, representing the series of Preferred Stock underlying such Depositary Shares shall have been duly executed, countersigned and registered and duly delivered against payment of the agreed consideration therefor or, if any shares of such series of Preferred Stock are to be issued in uncertificated form, the Company's books shall reflect the issuance of such shares of such series of Preferred Stock in accordance with the applicable definitive purchase, underwriting or similar agreement upon payment of the agreed consideration therefor in an amount not less than the par value thereof; and (vii) the depositary receipts evidencing Depositary Shares shall have been duly executed and delivered by the Depositary Agent in the manner set forth in the Deposit Agreement and in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof against payment of the agreed consideration therefor in an amount not less than the par value thereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. Each issue of Warrants covered by the Registration Statement will constitute valid and binding obligations of the Company when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act; (ii) a prospectus supplement with respect to the sale of such issue of Warrants and the Common Stock, Preferred Stock or Debt Securities issuable upon exercise of such Warrants shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) a Warrant Agreement relating to such issue of Warrants shall have been duly authorized, executed and delivered by the Company and duly executed and delivered by the Warrant Agent named in the Warrant Agreement; (iv) the Board or a duly authorized committee thereof shall have duly adopted final resolutions in conformity with the Charter, the By-Laws and the Resolutions authorizing the execution and delivery of the Warrant Agreement and the issuance and sale of such issue of Warrants; (v) if such Warrants are exercisable for Common Stock, the actions described in paragraph 1 above shall have been taken; (vi) if such Warrants are exercisable for Preferred Stock, the actions described in paragraph 2 above shall have been taken; (vii) if such Warrants are exercisable for Debt Securities, the actions described in paragraph 5 or 6 below, as applicable, shall have been taken; and (viii) the certificates, if any, representing such issue of Warrants shall have been duly executed, countersigned and issued in accordance with such Warrant Agreement and shall have been duly delivered in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof against payment of the agreed consideration therefor.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5. The Senior Debt Securities of each series covered by the Registration Statement will constitute valid and binding obligations of the Company when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act and the applicable Senior Indenture (including any necessary supplemental indenture) shall have been qualified under the Trust Indenture Act of 1939, as amended (the "<u>TIA</u>"); (ii) a prospectus supplement with respect to the sale of such series of Senior Debt Securities shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) the applicable Senior Indenture shall have been duly authorized, executed and delivered by the Company and the Senior Trustee; (iv) all necessary corporate action shall have been taken by the Company to authorize the form, terms, execution, delivery, performance, issuance and sale of such series of Senior Debt Securities as contemplated by the Registration Statement, the prospectus supplement relating to such Senior Debt Securities and the applicable Senior Indenture and to authorize the execution, delivery and performance of a supplemental indenture or officers' certificate establishing the form and terms of such series of Senior Debt Securities as contemplated by the applicable Senior Indenture; (v) a supplemental indenture or officers' certificate establishing the form and terms of such series of Senior Debt Securities shall have been duly executed and delivered by the Company and the Senior Trustee (in the case of such a supplemental indenture) or by duly authorized officers of the Company (in the case of such an officers' certificate), in each case in accordance with the provisions of the Charter, the By-Laws, the Resolutions, final resolutions of the Board or a duly authorized committee thereof and the applicable Senior Indenture; and (vi) the certificates evidencing the Senior Debt Securities of such series shall have been duly executed and delivered by the Company, authenticated by the Senior Trustee and issued, all in accordance with the Charter, the By-Laws, the Resolutions, final resolutions of the Board or a duly authorized committee thereof, the applicable Senior Indenture and the supplemental indenture or officers' certificate, as the case may be, establishing the form and terms of the Senior Debt Securities of such series, and shall have been duly delivered in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof against payment of the agreed consideration therefor.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6. The Subordinated Debt Securities of each series covered by the Registration Statement will constitute valid and binding obligations of the Company when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act and the applicable Subordinated Indenture (including any necessary supplemental indenture) shall have been qualified under the TIA; (ii) a prospectus supplement with respect to the sale of such series of Subordinated Debt Securities shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) the applicable Subordinated Indenture shall have been duly authorized, executed and delivered by the Company and the Subordinated Trustee; (iv) all necessary corporate action shall have been taken by the Company to authorize the form, terms, execution, delivery, performance, issuance and sale of such series of Subordinated Debt Securities as contemplated by the Registration Statement, the prospectus supplement relating to such Subordinated Debt Securities and the applicable Subordinated Indenture and to authorize the execution, delivery and performance of a supplemental indenture or officers' certificate establishing the form and terms of such series of Subordinated Debt Securities as contemplated by the applicable Subordinated Indenture; (v) a supplemental indenture or officers' certificate establishing the form and terms of such series of Subordinated Debt Securities shall have been duly executed and delivered by the Company and the Subordinated Trustee (in the case of such a supplemental indenture) or by duly authorized officers of the Company (in the case of such an officers' certificate), in each case in accordance with the provisions of the Charter, the By-Laws, the Resolutions, final resolutions of the Board or a duly authorized committee thereof and the applicable Subordinated Indenture; and (vi) the certificates evidencing the Subordinated Debt Securities of such series shall have been duly executed and delivered by the Company, authenticated by the Subordinated Trustee and issued, all in accordance with the Charter, the By-Laws, the Resolutions, final resolutions of the Board or a duly authorized committee thereof, the applicable Subordinated Indenture and the supplemental indenture or officers' certificate, as the case may be, establishing the form and terms of the Subordinated Debt Securities of such series, and shall have been duly delivered in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof against payment of the agreed consideration therefor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7. The Stock Purchase Contracts will constitute valid and binding obligations of the Company when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act; (ii) a prospectus supplement with respect to the sale of such Stock Purchase Contracts shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) a Stock Purchase Contract Agreement relating to such Stock Purchase Contracts shall have been duly authorized, executed and delivered by the Company and duly executed and delivered by the Stock Purchase Contract Agent named in the Stock Purchase Contract Agreement; (iv) the Board or a duly authorized committee thereof shall have duly adopted final resolutions in conformity with the Charter, the By-Laws and the Resolutions authorizing the execution, delivery, issuance and sale of such Stock Purchase Contracts; (v) the actions described in paragraph 1 above shall have been taken; and (vi) the certificates, if any, representing such Stock Purchase Contracts shall have been duly executed, countersigned and registered in accordance with the Stock Purchase Contract Agreement and shall have been duly delivered to the purchasers thereof in accordance with the Stock Purchase Contract Agreement against payment of the agreed consideration therefor.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8. The Stock Purchase Units will constitute valid and binding obligations of the Company when: (i) the Registration Statement, as finally amended (including any necessary post-effective amendments), shall have become effective under the Securities Act; (ii) a prospectus supplement with respect to the sale of such Stock Purchase Units shall have been filed with the SEC in compliance with the Securities Act and the rules and regulations thereunder; (iii) the applicable Unit Agreement relating to such Stock Purchase Unit shall have been duly authorized, executed and delivered by the Company and duly executed and delivered by the Unit Agent named in the Unit Agreement; (iv) the Board or a duly authorized committee thereof shall have duly adopted final resolutions in conformity with the Charter, the By-Laws and the Resolutions authorizing the execution, delivery, issuance and sale of such Stock Purchase Units; (v) if such Stock Purchase Units consist of Common Stock, the actions described in paragraph 1 above shall have been taken; (vi) if such Stock Purchase Units consist of Preferred Stock, the actions described in paragraph 2 above shall have been taken; (vii) if such Stock Purchase Units consist of Debt Securities, the actions described in paragraph 5 or 6 above, as applicable, shall have been taken; (viii) the actions described in paragraph 7 above shall have been taken; and (ix) the certificates, if any, representing such Stock Purchase Units shall have been duly executed, countersigned and registered in accordance with the applicable Unit Agreement and shall have been duly delivered in accordance with the applicable definitive purchase, underwriting or similar agreement to the purchasers thereof against payment of the agreed consideration therefor.

Our opinions are subject to bankruptcy, insolvency, bail-in, reorganization, moratorium, fraudulent conveyance, fraudulent transfer and other similar laws relating to or affecting creditors' rights generally, including, to the extent applicable, the rights or remedies of creditors of a "financial company" (as defined in Section 201 of the Dodd-Frank Wall Street Reform and Consumer Protection Act) or affiliates thereof, and to general equitable principles (regardless of whether considered in a proceeding in equity or at law), including concepts of commercial reasonableness, good faith and fair dealing and the possible unavailability of specific performance or injunctive relief, in each case, whether by operation of law, contract, judicial or regulatory action or otherwise. Our opinions are also subject to (i) provisions of law which may require that a judgment for money damages rendered by a court in the United States of America be expressed only in United States dollars, (ii) requirements that a claim with respect to any Debt Securities or other obligations that are denominated or payable other than in United States dollars (or a judgment denominated or payable other than in United States dollars in respect of such claim) be converted into United States dollars at a rate of exchange prevailing on a date determined pursuant to applicable law and (iii) governmental authority to limit, delay or prohibit the making of payments outside of the United States of America or in a foreign currency.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

For the purposes of this opinion letter, we have assumed that, at the time of the issuance, sale and delivery of any of the Securities:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) the applicable Securities being offered will be issued and sold as contemplated in the Registration Statement and the prospectus supplement relating thereto;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) the execution, delivery and performance by the Company of the Deposit Agreement, the Senior Indenture, each supplemental indenture to the Senior Indenture, the Subordinated Indenture, each supplemental indenture to the Subordinated Indenture, the Warrant Agreement, the Stock Purchase Contract Agreement, and the Unit Agreement, as applicable, and the issuance, sale and delivery of the applicable Securities will not (A) contravene or violate the Charter or By-Laws, (B) violate any law, rule or regulation applicable to the Company, (C) result in a default under or breach of any agreement or instrument binding upon the Company or any order, judgment or decree of any court or governmental authority applicable to the Company or (D) require any authorization, approval or other action by, or notice to or filing with, any court or governmental authority (other than such authorizations, approvals, actions, notices or filings which shall have been obtained or made, as the case may be, and which shall be in full force and effect);

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) with respect to any issuance of shares of Common Stock and shares of Preferred Stock in uncertificated form, the Company will comply with all applicable notice requirements regarding uncertificated shares provided in the IBCA;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) the authorization thereof by the Company will not have been modified or rescinded, and there will not have occurred any change in law affecting the validity, legally binding character or enforceability thereof;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) the Charter, the By-laws and the Resolutions, each as currently in effect, will not have been modified or amended and will be in full force and effect; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(vi) the Company will have a number of authorized and unissued shares of Common Stock and Preferred Stock sufficient to provide for the issuance of all shares of Common Stock and Preferred Stock issued pursuant to the transactions contemplated above and issuable upon exercise of any Warrants, Stock Purchase Contracts or Stock Purchase Units, as applicable.

We have further assumed that each Warrant Agreement, each Warrant, each Deposit Agreement, each Stock Purchase Contract, each Stock Purchase Unit, each Senior Indenture, each supplemental indenture to each Senior Indenture, each Subordinated Indenture, each supplemental indenture to each Subordinated Indenture, each Stock Purchase Contract Agreement and each Unit Agreement will be governed by the laws of the State of New York.

![](tm2613073d2_ex5-1img01.jpg)

Wintrust Financial Corporation

May 7, 2026

With respect to each instrument or agreement referred to in or otherwise relevant to the opinions set forth herein (each, an "<u>Instrument</u>"), we have assumed, to the extent relevant to the opinions set forth herein, that: (i) each party to such Instrument (if not a natural person) was duly organized or formed, as the case may be, and was at all relevant times and is validly existing and in good standing under the laws of its jurisdiction of organization or formation, as the case may be, and had at all relevant times and has full right, power and authority to execute, deliver and perform its obligations under such Instrument; (ii) such Instrument has been duly authorized, executed and delivered by each party thereto; and (iii) such Instrument was at all relevant times and is a valid, binding and enforceable agreement or obligation, as the case may be, of each party thereto; provided that we make no assumption in clause (iii) insofar as such assumption relates to the Company and is expressly covered by our opinions set forth herein.

This opinion letter is limited to the IBCA and the laws of the State of New York (excluding the securities laws of the State of New York). We express no opinion as to the laws, rules or regulations of any other jurisdiction, including, without limitation, the federal laws of the United States of America or any state securities or blue sky laws.

We hereby consent to the filing of this opinion letter as an exhibit to the Registration Statement and to all references to our Firm included in or made a part of the Registration Statement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act.

---

| |
|:---|
| Very truly yours, |
| /s/ Sidley Austin LLP |

---

## Exhibit 23.1

**Exhibit 23.1**

**Consent of Independent Registered Public Accounting Firm**

We consent to the reference to our firm under the caption "Experts" in this Registration Statement (Form S-3) and related Prospectus of Wintrust Financial Corporation for the registration of debt securities, common stock, preferred stock, depositary shares, warrants, stock purchase contracts, stock purchase units and hybrid securities combining elements of the foregoing and to the incorporation by reference therein of our reports dated February 26, 2026, with respect to the consolidated financial statements of Wintrust Financial Corporation, and the effectiveness of internal control over financial reporting of Wintrust Financial Corporation, included in its Annual Report (Form 10-K) for the year ended December 31, 2025, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

Chicago, Illinois

May 7, 2026

## Exhibit 25.2

**Exhibit 25.2**

**securities and exchange commission**

**Washington, D.C. 20549**

**FORM T-1**

**Statement of Eligibility Under**

**The Trust Indenture Act of 1939 of a**

**Corporation Designated to Act as Trustee**

Check if an Application to Determine Eligibility of

a Trustee Pursuant to Section 305(b)(2) ◻

**U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION**

(Exact name of Trustee as specified in its charter)

**91-1821036**

I.R.S. Employer Identification No.

200 South 6<sup>th</sup> Street Minneapolis, Minnesota <u> 55402</u> <br> <u>(Address of principal executive offices)</u> <u>(Zip Code)</u>

Gregory M. Jackson

U.S. Bank Trust Company, National Association

2 Concourse Parkway, Suite 800

Atlanta, GA 30328

(404)898-8837

(Name, address and telephone number of agent for service)

**Wintrust Financial Corporation**

(Issuer with respect to the Securities)

Illinois <u>36-3873352</u> <br> <u>(State or other jurisdiction of incorporation or organization)</u> <u>(I.R.S. Employer Identification No.)</u> <br>    

9700 W. Higgins Road, Suite 800 Rosemont, IL <u>60018</u> <br> <u>(Address of Principal Executive Offices)</u> <u>(Zip Code)</u>

**Debt Securities**

**(Title of the Indenture Securities)**

**<u>FORM T-1</u>**

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| | |
|:---|:---|
| **Item **1.** | **GENERAL INFORMATION*.*** Furnish the following information as to the Trustee. |

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a) *Name and address of each examining or supervising authority to which it is subject.* 

Comptroller of the Currency

Washington, D.C.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b) *Whether it is authorized to exercise corporate trust powers.* 

Yes

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| | |
|:---|:---|
| **Item **2.** | **AFFILIATIONS WITH THE OBLIGOR.** *If the obligor is an affiliate of the Trustee, describe each such affiliation.* |

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None

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| | |
|:---|:---|
| **Items **3-15** | *Items 3-15 are not applicable because to the best of the Trustee's knowledge, the obligor is not in default under any Indenture for which the Trustee acts as Trustee.* |

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**Item 16.** **LIST OF EXHIBITS:** *List below all exhibits filed as a part of this statement of eligibility and qualification.*

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. A copy of the Articles of Association of the Trustee, attached
as Exhibit 1.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. A copy of the certificate of authority of the Trustee to commence
business, attached as Exhibit 2.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. A copy of the authorization of the Trustee to exercise corporate
trust powers, included as Exhibit 2.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. A copy of the existing bylaws of the Trustee, attached as Exhibit 4.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5. A copy of each Indenture referred to in Item 4. Not applicable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6. The consent of the Trustee required by Section 321(b) of the Trust Indenture Act of 1939, attached as Exhibit 6.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7. Report of Condition of the Trustee as of December 31, 2025, published pursuant to law or the requirements of its supervising
or examining authority, attached as Exhibit 7.

**SIGNATURE**

Pursuant to the requirements of the Trust Indenture Act of 1939, as amended, the Trustee, U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, a national banking association organized and existing under the laws of the United States of America, has duly caused this statement of eligibility and qualification to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of Atlanta, State of Georgia on the 4th of May, 2026.

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| | |
|:---|:---|
| By: | /s/ Gregory M. Jackson |
|  | Gregory M. Jackson |
|  | Vice President |

---

**<u>Exhibit 1</u>**

**ARTICLES OF ASSOCIATION**

**OF**

**U. S. BANK TRUST COMPANY, NATIONAL ASSOCIATION**

For the purpose of organizing an association (the "Association") to perform any lawful activities of national banks, the undersigned enter into the following Articles of Association:

**FIRST.** The title of this Association shall be U. S. Bank Trust Company, National Association.

**SECOND.** The main office of the Association shall be in the city of Portland, county of Multnomah, state of Oregon. The business of the Association will be limited to fiduciary powers and the support of activities incidental to the exercise of those powers. The Association may not expand or alter its business beyond that stated in this article without the prior approval of the Comptroller of the Currency.

**THIRD.** The board of directors of the Association shall consist of not less than five nor more than twenty-five persons, the exact number to be fixed and determined from time to time by resolution of a majority of the full board of directors or by resolution of a majority of the shareholders at any annual or special meeting thereof. Each director shall own common or preferred stock of the Association or of a holding company owning the Association, with an aggregate par, fair market, or equity value of not less than $1,000, as of either (i) the date of purchase, (ii) the date the person became a director, or (iii) the date of that person's most recent election to the board of directors, whichever is more recent. Any combination of common or preferred stock of the Association or holding company may be used.

Any vacancy in the board of directors may be filled by action of a majority of the remaining directors between meetings of shareholders. The board of directors may increase the number of directors up to the maximum permitted by law. Terms of directors, including directors selected to fill vacancies, shall expire at the next regular meeting of shareholders at which directors are elected, unless the directors resign or are removed from office. Despite the expiration of a director's term, the director shall continue to serve until his or her successor is elected and qualified or until there is a decrease in the number of directors and his or her position is eliminated.

Honorary or advisory members of the board of directors, without voting power or power of final decision in matters concerning the business of the Association, may be appointed by resolution of a majority of the full board of directors, or by resolution of shareholders at any annual or special meeting. Honorary or advisory directors shall not be counted to determined the number of directors of the Association or the presence of a quorum in connection with any board action, and shall not be required to own qualifying shares.

**FOURTH.** There shall be an annual meeting of the shareholders to elect directors and transact whatever other business may be brought before the meeting. It shall be held at the main office or any other convenient place the board of directors may designate, on the day of each year specified therefor in the Bylaws, or if that day falls on a legal holiday in the state in which the Association is located, on the next following banking day. If no election is held on the day fixed or in the event of a legal holiday on the following banking day, an election may be held on any subsequent day within 60 days of the day fixed, to be designated by the board of directors, or, if the directors fail to fix the day, by shareholders representing two-thirds of the shares issued and outstanding. In all cases, at least 10 days' advance notice of the meeting shall be given to the shareholders by first-class mail.

In all elections of directors, the number of votes each common shareholder may cast will be determined by multiplying the number of shares he or she owns by the number of directors to be elected. Those votes may be cumulated and cast for a single candidate or may be distributed among two or more candidates in the manner selected by the shareholder. On all other questions, each common shareholder shall be entitled to one vote for each share of stock held by him or her.

A director may resign at any time by delivering written notice to the board of directors, its chairperson, or to the Association, which resignation shall be effective when the notice is delivered unless the notice specifies a later effective date.

A director may be removed by the shareholders at a meeting called to remove him or her, when notice of the meeting stating that the purpose or one of the purposes is to remove him or her is provided, if there is a failure to fulfill one of the affirmative requirements for qualification, or for cause; provided, however, that a director may not be removed if the number of votes sufficient to elect him or her under cumulative voting is voted against his or her removal.

**FIFTH.** The authorized amount of capital stock of the Association shall be 1,000,000 shares of common stock of the par value of ten dollars ($10) each; but said capital stock may be increased or decreased from time to time, according to the provisions of the laws of the United States. The Association shall have only one class of capital stock.

No holder of shares of the capital stock of any class of the Association shall have any preemptive or preferential right of subscription to any shares of any class of stock of the Association, whether now or hereafter authorized, or to any obligations convertible into stock of the Association, issued, or sold, nor any right of subscription to any thereof other than such, if any, as the board of directors, in its discretion, may from time to time determine and at such price as the board of directors may from time to time fix.

Transfers of the Association's stock are subject to the prior written approval of a federal depository institution regulatory agency. If no other agency approval is required, the approval of the Comptroller of the Currency must be obtained prior to any such transfers.

Unless otherwise specified in the Articles of Association or required by law, (1) all matters requiring shareholder action, including amendments to the Articles of Association must be approved by shareholders owning a majority voting interest in the outstanding voting stock, and (2) each shareholder shall be entitled to one vote per share.

Unless otherwise specified in the Articles of Association or required by law, all shares of voting stock shall be voted together as a class, on any matters requiring shareholder approval.

Unless otherwise provided in the Bylaws, the record date for determining shareholders entitled to notice of and to vote at any meeting is the close of business on the day before the first notice is mailed or otherwise sent to the shareholders, provided that in no event may a record date be more than 70 days before the meeting.

The Association, at any time and from time to time, may authorize and issue debt obligations, whether subordinated, without the approval of the shareholders. Obligations classified as debt, whether subordinated, which may be issued by the Association without the approval of shareholders, do not carry voting rights on any issue, including an increase or decrease in the aggregate number of the securities, or the exchange or reclassification of all or part of securities into securities of another class or series.

**SIXTH.** The board of directors shall appoint one of its members president of this Association and one of its members chairperson of the board and shall have the power to appoint one or more vice presidents, a secretary who shall keep minutes of the directors' and shareholders' meetings and be responsible for authenticating the records of the Association, and such other officers and employees as may be required to transact the business of this Association. A duly appointed officer may appoint one or more officers or assistant officers if authorized by the board of directors in accordance with the Bylaws.

The board of directors shall have the power to:

(1) Define the duties of the officers, employees, and agents of the Association.

(2) Delegate the performance of its duties, but not the responsibility for its duties, to the officers, employees,
and agents of the Association.

(3) Fix the compensation and enter employment contracts with its officers and employees upon reasonable terms
and conditions consistent with applicable law.

(4) Dismiss officers and employees.

(5) Require bonds from officers and employees and to fix the penalty thereof.

(6) Ratify written policies authorized by the Association's management or committees of the board.

(7) Regulate the manner any increase or decrease of the capital of the Association shall be made; provided
that nothing herein shall restrict the power of shareholders to increase or decrease the capital of the Association in accordance with
law, and nothing shall raise or lower from two-thirds the percentage required for shareholder approval to increase or reduce the capital.

(8) Manage and administer the business and affairs of the Association.

(9) Adopt initial Bylaws, not inconsistent with law or the Articles of Association, for managing the business and regulating the affairs
of the Association.

(10) Amend or repeal Bylaws, except to the extent that the Articles of Association reserve this power in whole or in part to the shareholders.

(11) Make contracts.

(12) Generally perform all acts that are legal for a board of directors to perform.

**SEVENTH.** The board of directors shall have the power to change the location of the main office to any authorized branch within the limits of the city of Portland, Oregon, without the approval of the shareholders, or with a vote of shareholders owning two-thirds of the stock of the Association for a location outside such limits and upon receipt of a certificate of approval from the Comptroller of the Currency, to any other location within or outside the limits of the city of Portland, Oregon, but not more than thirty miles beyond such limits. The board of directors shall have the power to establish or change the location of any office or offices of the Association to any other location permitted under applicable law, without approval of shareholders, subject to approval by the Comptroller of the Currency.

**EIGHTH.** The corporate existence of this Association shall continue until termination according to the laws of the United States.

**NINTH.** The board of directors of the Association, or any shareholder owning, in the aggregate, not less than 25 percent of the stock of the Association, may call a special meeting of shareholders at any time. Unless otherwise provided by the Bylaws or the laws of the United States, or waived by shareholders, a notice of the time, place, and purpose of every annual and special meeting of the shareholders shall be given by first-class mail, postage prepaid, mailed at least 10, and no more than 60, days prior to the date of the meeting to each shareholder of record at his/her address as shown upon the books of the Association. Unless otherwise provided by the Bylaws, any action requiring approval of shareholders must be effected at a duly called annual or special meeting.

**TENTH.** These Articles of Association may be amended at any regular or special meeting of the shareholders by the affirmative vote of the holders of a majority of the stock of the Association, unless the vote of the holders of a greater amount of stock is required by law, and in that case by the vote of the holders of such greater amount; provided, that the scope of the Association's activities and services may not be expanded without the prior written approval of the Comptroller of the Currency. The Association's board of directors may propose one or more amendments to the Articles of Association for submission to the shareholders.

In witness whereof, we have hereunto set our hands this <u>11</u><sup>th</sup> of June, 1997.

---

| |
|:---|
| /s/ Jeffrey T. Grubb |
| Jeffrey T. Grubb |
| /s/ Robert D. Sznewajs |
| Robert D. Sznewajs |
| /s/ Dwight V. Board |
| Dwight V. Board |
| /s/ P. K. Chatterjee |
| P. K. Chatterjee |
| /s/ Robert Lane |
| Robert Lane |

---

**<u>Exhibit 2</u>**

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| | |
|:---|:---|
| ![](tm2613073d2_ex25-2spimg02.jpg) | <br>Office of the Comptroller of the Currency |
| ![](tm2613073d2_ex25-2spimg02.jpg) | Washington, DC 20219 |

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**CERTIFICATE OF CORPORATE EXISTENCE AND FIDUCIARY POWERS**

I, Jonathan Gould, Comptroller of the Currency, do hereby certify that:

1. The Comptroller of the Currency, pursuant to Revised Statutes 324, et seq, as amended, and 12 USC 1, et seq, as amended, has possession, custody, and control of all records pertaining to the chartering, regulation, and supervision of all national banking associations.

2. "U.S. Bank Trust Company, National Association," Portland, Oregon (Charter No. 23412), is a national banking association formed under the laws of the United States and is authorized thereunder to transact the business of banking and exercise fiduciary powers on the date of this certificate.

IN TESTIMONY WHEREOF, today, March 27, 2026, I have hereunto subscribed my name and caused my seal of office to be affixed to these presents at the U.S. Department of the Treasury, in the City of Washington, District of Columbia.

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| |
|:---|
| /s/ Jonathan Gould |
| Comptroller of the Currency |

---

![](tm2613073d2_ex25-2spimg01.jpg)

2026-00886-C <br>    

**<u>Exhibit 4</u>**

**U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION**

**<u>AMENDED AND RESTATED BYLAWS</u>**

<u>ARTICLE I</u>

<u>Meetings of Shareholders</u>

Section 1.1. <u>Annual Meeting</u>. The annual meeting of the shareholders, for the election of directors and the transaction of any other proper business, shall be held at a time and place as the Chairman or President may designate. Notice of such meeting shall be given not less than ten (10) days or more than sixty (60) days prior to the date thereof, to each shareholder of the Association, unless the Office of the Comptroller of the Currency (the "OCC") determines that an emergency circumstance exists. In accordance with applicable law, the sole shareholder of the Association is permitted to waive notice of the meeting. If, for any reason, an election of directors is not made on the designated day, the election shall be held on some subsequent day, as soon thereafter as practicable, with prior notice thereof. Failure to hold an annual meeting as required by these Bylaws shall not affect the validity of any corporate action or work a forfeiture or dissolution of the Association.

Section 1.2. <u>Special Meetings</u>. Except as otherwise specially provided by law, special meetings of the shareholders may be called for any purpose, at any time by a majority of the board of directors (the "Board"), or by any shareholder or group of shareholders owning at least ten percent of the outstanding stock.

Every such special meeting, unless otherwise provided by law, shall be called upon not less than ten (10) days nor more than sixty (60) days prior notice stating the purpose of the meeting.

Section 1.3. <u>Nominations for Directors</u>. Nominations for election to the Board may be made by the Board or by any shareholder.

Section 1.4. <u>Proxies</u>. Shareholders may vote at any meeting of the shareholders by proxies duly authorized in writing. Proxies shall be valid only for one meeting and any adjournments of such meeting and shall be filed with the records of the meeting.

Section 1.5. <u>Record Date</u>. The record date for determining shareholders entitled to notice and to vote at any meeting will be thirty days before the date of such meeting, unless otherwise determined by the Board.

Section 1.6. <u>Quorum and Voting</u>. A majority of the outstanding capital stock,represented in person or by proxy, shall constitute a quorum at an meeting of shareholders, unless otherwise provided by law, but less than a quorum may adjourn any meeting, from time to time, and the meeting may be held as adjourned without further notice. A majority of the votes cast shall decide every question or matter submitted to the shareholders at any meeting, unless otherwise provided by law or by the Articles of Association.

Section 1.7. <u>Inspectors</u>. The Board may, and in the event of its failure so to do, the Chairman of the Board may appoint Inspectors of Election who shall determine the presence of quorum, the validity of proxies, and the results of all elections and all other matters voted upon by shareholders at all annual and special meetings of shareholders.

Section 1.8. <u>Waiver and Consent</u>. The shareholders may act without notice or a meeting by a unanimous written consent by all shareholders.

Section 1.9. <u>Remote Meetings</u>. The Board shall have the right to determine that a shareholder meeting not be held at a place, but instead be held solely by means of remote communication in the manner and to the extent permitted by the General Corporation Law of the State of Delaware.

<u>ARTICLE II</u> 

<u>Directors</u>

Section 2.1. <u>Board of Directors</u>. The Board shall have the power to manage and administer the business and affairs of the Association. Except as expressly limited by law, all corporate powers of the Association shall be vested in and may be exercised by the Board.

Section 2.2. <u>Term of Office</u>. The directors of this Association shall hold office for one year and until their successors are duly elected and qualified, or until their earlier resignation or removal.

Section 2.3. <u>Powers</u>. In addition to the foregoing, the Board shall have and may exercise all of the powers granted to or conferred upon it by the Articles of Association, the Bylaws and by law.

Section 2.4. <u>Number</u>. As provided in the Articles of Association, the Board of this Association shall consist of no less than five nor more than twenty-five members, unless the OCC has exempted the Association from the twenty-five-member limit. The Board shall consist of a number of members to be fixed and determined from time to time by resolution of the Board or the shareholders at any meeting thereof, in accordance with the Articles of Association. Between meetings of the shareholders held for the purpose of electing directors, the Board by a majority vote of the full Board may increase the size of the Board but not to more than a total of twenty-five directors, and fill any vacancy so created in the Board; provided that the Board may increase the number of directors only by up to two directors, when the number of directors last elected by shareholders was fifteen or fewer, and by up to four directors, when the number of directors last elected by shareholders was sixteen or more. Each director shall own a qualifying equity interest in the Association or a company that has control of the Association in each case as required by applicable law. Each director shall own such qualifying equity interest in his or her own right and meet any minimum threshold ownership required by applicable law.

Section 2.5. <u>Organization Meeting</u>. The newly elected Board shall meet for the purpose of organizing the new Board and electing and appointing such officers of the Association as may be appropriate. Such meeting shall be held on the day of the election or as soon thereafter as practicable, and, in any event, within thirty days thereafter, at such time and place as the Chairman or President may designate. If, at the time fixed for such meeting, there shall not be a quorum present, the directors present may adjourn the meeting until a quorum is obtained.

Section 2.6. <u>Regular Meetings</u>. The regular meetings of the Board shall be held, without notice, as the Chairman or President may designate and deem suitable.

Section 2.7. <u>Special Meetings</u>. Special meetings of the Board may be called at any time, at any place and for any purpose by the Chairman of the Board or the President of the Association, or upon the request of a majority of the entire Board. Notice of every special meeting of the Board shall be given to the directors at their usual places of business, or at such other addresses as shall have been furnished by them for the purpose. Such notice shall be given at least twelve hours (three hours if meeting is to be conducted by conference telephone) before the meeting by telephone or by being personally delivered, mailed, or electronically delivered. Such notice need not include a statement of the business to be transacted at, or the purpose of, any such meeting.

Section 2.8. <u>Quorum and Necessary Vote</u>. A majority of the directors shall constitute a quorum at any meeting of the Board, except when otherwise provided by law; but less than a quorum may adjourn any meeting, from time to time, and the meeting may be held as adjourned without further notice. Unless otherwise provided by law or the Articles or Bylaws of this Association, once a quorum is established, any act by a majority of those directors present and voting shall be the act of the Board.

Section 2.9. <u>Written Consent</u>. Except as otherwise required by applicable laws and regulations, the Board may act without a meeting by a unanimous written consent by all directors, to be filed with the Secretary of the Association as part of the corporate records.

Section 2.10. <u>Remote Meetings</u>. Members of the Board, or of any committee thereof, may participate in a meeting of such Board or committee by means of conference telephone, video or similar communications equipment by means of which all persons participating in the meeting can hear each other and such participation shall constitute presence in person at such meeting.

Section 2.11. <u>Vacancies</u>. When any vacancy occurs among the directors, the remaining members of the Board may appoint a director to fill such vacancy at any regular meeting of the Board, or at a special meeting called for that purpose.

<u>ARTICLE III</u>

<u>Committees</u>

Section 3.1. <u>Advisory Board of Directors</u>. The Board may appoint persons, who need not be directors, to serve as advisory directors on an advisory board of directors established with respect to the business affairs of either this Association alone or the business affairs of a group of affiliated organizations of which this Association is one. Advisory directors shall have such powers and duties as may be determined by the Board, provided, that the Board's responsibility for the business and affairs of this Association shall in no respect be delegated or diminished.

Section 3.2. <u>Trust Audit Committee</u>. At least once during each calendar year, the Association shall arrange for a suitable audit (by internal or external auditors) of all significant fiduciary activities under the direction of its trust audit committee, a function that will be fulfilled by the Audit Committee of the financial holding company that is the ultimate parent of this Association. The Association shall note the results of the audit (including significant actions taken as a result of the audit) in the minutes of the Board. In lieu of annual audits, the Association may adopt a continuous audit system in accordance with 12 C.F.R. § 9.9(b).

The Audit Committee of the financial holding company that is the ultimate parent of this Association, fulfilling the function of the trust audit committee:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) Must not include any officers of the Association or an affiliate who participate significantly in the administration of the Association's fiduciary activities; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) Must consist of a majority of members who are not also members of any committee to which the Board has delegated power to manage and control the fiduciary activities of the Association.

Section 3.3. <u>Executive Committee</u>. The Board may appoint an Executive Committee which shall consist of at least three directors and which shall have, and may exercise, to the extent permitted by applicable law, all the powers of the Board between meetings of the Board or otherwise when the Board is not meeting.

Section 3.4. <u>Trust Management Committee</u>. The Board of this Association shall appoint a Trust Management Committee to provide oversight of the fiduciary activities of the Association. The Trust Management Committee shall determine policies governing fiduciary activities. The Trust Management Committee or such sub-committees, officers or others as may be duly designated by the Trust Management Committee shall oversee the processes related to fiduciary activities to assure conformity with fiduciary policies it establishes, including ratifying the acceptance and the closing out or relinquishment of all trusts. The Trust Management Committee will provide regular reports of its activities to the Board.

Section 3.5. <u>Other Committees</u>. The Board may appoint, from time to time, committees of one or more persons who need not be directors, for such purposes and with such powers as the Board may determine; however, the Board will not delegate to any committee any powers or responsibilities that it is prohibited from delegating under any law or regulation. In addition, either the Chairman or the President may appoint, from time to time, committees of one or more officers, employees, agents or other persons, for such purposes and with such powers as either the Chairman or the President deems appropriate and proper. Whether appointed by the Board, the Chairman, or the President, any such committee shall at all times be subject to the direction and control of the Board.

Section 3.6. <u>Meetings, Minutes and Rules</u>. An advisory board of directors and/or committee shall meet as necessary in consideration of the purpose of the advisory board of directors or committee, and shall maintain minutes in sufficient detail to indicate actions taken or recommendations made; unless required by the members, discussions, votes or other specific details need not be reported. An advisory board of directors or a committee may, in consideration of its purpose, adopt its own rules for the exercise of any of its functions or authority.

<u>ARTICLE IV</u>

<u>Officers</u>

Section 4.1 Who Shall Constitut<u>e.</u> The Officers of the Association shall be a Chief Executive Officer, a President, a Secretary, and other officers such as Vice Chair, Executive Vice Presidents, Senior Vice Presidents, Vice Presidents, Assistant Vice Presidents, Assistant Secretaries, Trust Officers, Assistant Trust Officers, Controller, and Assistant Controller, as the Board may appoint from time to time. The Board may appoint or elect a person as a Vice Chair without regard to whether such person is a member of the Board. The Board may choose to delegate authority to elect officers other than the Chief Executive Officer, President, Secretary, Vice Chairs and Senior Executive Vice Presidents, to the President. Any person may hold two offices. The President shall at all times be a member of the Board of Directors.

Section 4.2 Term of Offic<u>e.</u> All officers shall be elected for and shall hold office until their respective successors are elected and qualified or until their earlier death, resignation, retirement, disqualification or removal from office, subject to the right of the Board of Directors in its sole discretion to discharge any officer at any time. The Board may choose to delegate authority to remove officers other than the Chairman, Chief Executive Officer, President, Secretary, Vice Chair and Senior Executive Vice Presidents, to the President.

Section 4.3. <u>Chairman of the Board</u>. The Board may appoint one of its members to be Chairman of the Board to serve at the pleasure of the Board. The Chairman shall supervise the carrying out of the policies adopted or approved by the Board; shall have general executive powers, as well as the specific powers conferred by these Bylaws; and shall also have and may exercise such powers and duties as from time to time may be conferred upon or assigned by the Board.

Section 4.4. <u>President</u>. The Board may appoint one of its members to be President of the Association. In the absence of the Chairman, the President shall preside at any meeting of the Board. The President shall have general executive powers, and shall have and may exercise any and all other powers and duties pertaining by law, regulation or practice, to the office of President, or imposed by these Bylaws. The President shall also have and may exercise such powers and duties as from time to time may be conferred or assigned by the Board.

Section 4.5. <u>Vice President</u>. The Board may appoint one or more Vice Presidents who shall have such powers and duties as may be assigned by the Board and to perform the duties of the President on those occasions when the President is absent, including presiding at any meeting of the Board in the absence of both the Chairman and President.

Section 4.6. <u>Secretary</u>. The Board shall appoint a Secretary, or other designated officer who shall be Secretary of the Board and of the Association, and shall keep accurate minutes of all meetings. The Secretary shall attend to the giving of all notices required by these Bylaws to be given; shall be custodian of the corporate seal, records, documents and papers of the Association; shall provide for the keeping of proper records of all transactions of the Association; shall, upon request, authenticate any records of the Association; shall have and may exercise any and all other powers and duties pertaining by law, regulation or practice, to the Secretary, or imposed by these Bylaws; and shall also perform such other duties as may be assigned from time to time by the Board. The Board may appoint one or more Assistant Secretaries with such powers and duties as the Board, the President or the Secretary shall from time to time determine.

Section 4.7. <u>Other Officers</u>. The Board may appoint, and may authorize the Chairman, the President or any other officer to appoint, any officer as from time to time may appear to the Board, the Chairman, the President or such other officer to be required or desirable to transact the business of the Association.

Such officers shall exercise such powers and perform such duties as pertain to their several offices, or as may be conferred upon or assigned to them by these Bylaws, the Board, the Chairman, the President or such other authorized officer. Any person may hold two offices.

<u>ARTICLE V</u>

<u>Stock</u>

Section 5.1. The Board may authorize the issuance of stock either in certificated or in uncertificated form. Certificates for shares of stock shall be in such form as the Board may from time to time prescribe. If the Board issues certificated stock, the certificate shall be signed by the President, Secretary or any other such officer as the Board so determines. Shares of stock shall be transferable on the books of the Association, and a transfer book shall be kept in which all transfers of stock shall be recorded. Every person becoming a shareholder by such transfer shall, in proportion to such person's shares, succeed to all rights of the prior holder of such shares. Each certificate of stock shall recite on its face that the stock represented thereby is transferable only upon the books of the Association properly endorsed. The Board may impose conditions upon the transfer of the stock reasonably calculated to simplify the work of the

Association for stock transfers, voting at shareholder meetings, and related matters, and to protect it against fraudulent transfers.

<u>ARTICLE VI</u> 

<u>Corporate Seal</u>

Section 6.1. The Association shall have no corporate seal; provided, however, that if the use of a seal is required by, or is otherwise convenient or advisable pursuant to, the laws or regulations of any jurisdiction, the following seal may be used, and the Chairman, the President, the Secretary and any Assistant Secretary shall have the authority to affix such seal:

<u>ARTICLE VII</u> 

<u>Miscellaneous Provisions</u>

Section 7.1. <u>Execution of Instruments</u>. All agreements, checks, drafts, orders, indentures, notes, mortgages, deeds, conveyances, transfers, endorsements, assignments, certificates, declarations, receipts, discharges, releases, satisfactions, settlements, petitions, schedules, accounts, affidavits, bonds, undertakings, guarantees, proxies and other instruments or documents may be signed, countersigned, executed, acknowledged, endorsed, verified, delivered or accepted on behalf of the Association, whether in a fiduciary capacity or otherwise, by any officer of the Association, or such employee or agent as may be designated from time to time by the Board by resolution, or by the Chairman or the President by written instrument, which resolution or instrument shall be certified as in effect by the Secretary or an Assistant Secretary of the Association. The provisions of this section are supplementary to any other provision of the Articles of Association or Bylaws.

Section 7.2. <u>Records</u>. The Articles of Association, the Bylaws as revised or amended from time to time and the proceedings of all meetings of the shareholders, the Board, and standing committees of the Board, shall be recorded in appropriate minute books provided for the purpose. The minutes of each meeting shall be signed by the Secretary, or other officer appointed to act as Secretary of the meeting.

Section 7.3. <u>Trust Files</u>. There shall be maintained in the Association files all fiduciary records necessary to assure that its fiduciary responsibilities have been properly undertaken and discharged.

Section 7.4. <u>Trust Investments</u>. Funds held in a fiduciary capacity shall be invested according to the instrument establishing the fiduciary relationship and according to law. Where such instrument does not specify the character and class of investments to be made and does not vest in the Association a discretion in the matter, funds held pursuant to such instrument shall be invested in investments in which corporate fiduciaries may invest under law.

Section 7.5. <u>Notice</u>. Whenever notice is required by the Articles of Association, the Bylaws or law, such notice shall be by mail, postage prepaid, e-mail, in person, or by any other means by which such notice can reasonably be expected to be received, using the address of the person to receive such notice, or such other personal data, as may appear on the records of the Association.

Except where specified otherwise in these Bylaws, prior notice shall be proper if given not more than 30 days nor less than 10 days prior to the event for which notice is given.

<u>ARTICLE VIII</u>

<u>Indemnification</u>

Section 8.1. The Association shall indemnify such persons for such liabilities in such manner under such circumstances and to such extent as permitted by Section 145 of the Delaware General Corporation Law, as now enacted or hereafter amended. The Board may authorize the purchase and maintenance of insurance and/or the execution of individual agreements for the purpose of such indemnification, and the Association shall advance all reasonable costs and expenses (including attorneys' fees) incurred in defending any action, suit or proceeding to all persons entitled to indemnification under this Section 8.1. Such insurance shall be consistent with the requirements of 12 C.F.R. § 7.2014 and shall exclude coverage of liability for a formal order assessing civil money penalties against an institution-affiliated party, as defined at 12 U.S.C. § 1813(u).

Section 8.2. Notwithstanding Section 8.1, however, (a) any indemnification payments to an institution-affiliated party, as defined at 12 U.S.C. § 1813(u), for an administrative proceeding or civil action initiated by a federal banking agency, shall be reasonable and consistent with the requirements of 12 U.S.C. § 1828(k) and the implementing regulations thereunder; and (b) any indemnification payments and advancement of costs and expenses to an institution-affiliated party, as defined at 12 U.S.C. § 1813(u), in cases involving an administrative proceeding or civil action not initiated by a federal banking agency, shall be in accordance with Delaware General Corporation Law and consistent with safe and sound banking practices.

<u>ARTICLE IX</u>

<u>Bylaws: Interpretation and Amendment</u>

Section 9.1. These Bylaws shall be interpreted in accordance with and subject to appropriate provisions of law, and may be added to, altered, amended, or repealed, at any regular or special meeting of the Board.

Section 9.2. A copy of the Bylaws and all amendments shall at all times be kept in a convenient place at the principal office of the Association, and shall be open for inspection to all shareholders during Association hours.

<u>ARTICLE X</u>

<u>Miscellaneous Provisions</u>

Section 10.1. <u>Fiscal Year</u>. The fiscal year of the Association shall begin on the first day of January in each year and shall end on the thirty-first day of December following.

Section 10.2. <u>Governing Law</u>. This Association designates the Delaware General Corporation Law, as amended from time to time, as the governing law for its corporate governance procedures, to the extent not inconsistent with Federal banking statutes and regulations or bank safety and soundness.

\*\*\*

(November 6, 2025)

**<u>Exhibit 6</u>**

**CONSENT**

In accordance with Section 321(b) of the Trust Indenture Act of 1939, the undersigned, U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION hereby consents that reports of examination of the undersigned by Federal, State, Territorial or District authorities may be furnished by such authorities to the Securities and Exchange Commission upon its request therefor.

---

| | | |
|:---|:---|:---|
| Dated: May 4, 2026 |  |  |
|  | By: | /s/ Gregory M. Jackson |
|  |  | Gregory M. Jackson |
|  |  | Vice President |

---

**<u>Exhibit 7</u>**

**U.S. Bank Trust Company, National Association**

**Statement of Financial Condition**

**as of 12/31/2025**

**($000's)**

---

| | |
|:---|:---|
|  | **12/31/2025** |
| **Assets** |  |
| &nbsp;&nbsp;&nbsp;Cash and Balances Due From | $2035855 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Depository Institutions |  |
| &nbsp;&nbsp;&nbsp;Securities | 4696 |
| &nbsp;&nbsp;&nbsp;Federal Funds | 0 |
| &nbsp;&nbsp;&nbsp;Loans & Lease Financing Receivables | 0 |
| &nbsp;&nbsp;&nbsp;Fixed Assets | 623 |
| &nbsp;&nbsp;&nbsp;Intangible Assets | 574084 |
| &nbsp;&nbsp;&nbsp;Other Assets | 173370 |
| &nbsp;&nbsp;&nbsp;**Total Assets** | $**2788628** |
| **Liabilities** |  |
| &nbsp;&nbsp;&nbsp;Deposits | $0 |
| &nbsp;&nbsp;&nbsp;Fed Funds | 0 |
| &nbsp;&nbsp;&nbsp;Treasury Demand Notes | 0 |
| &nbsp;&nbsp;&nbsp;Trading Liabilities | 0 |
| &nbsp;&nbsp;&nbsp;Other Borrowed Money | 0 |
| &nbsp;&nbsp;&nbsp;Acceptances | 0 |
| &nbsp;&nbsp;&nbsp;Subordinated Notes and Debentures | 0 |
| &nbsp;&nbsp;&nbsp;Other Liabilities | 237596 |
| &nbsp;&nbsp;&nbsp;**Total Liabilities** | $**237596** |
| **Equity** |  |
| &nbsp;&nbsp;&nbsp;Common and Preferred Stock | 200 |
| &nbsp;&nbsp;&nbsp;Surplus | 1171635 |
| &nbsp;&nbsp;&nbsp;Undivided Profits | 1379197 |
| &nbsp;&nbsp;&nbsp;Minority Interest in Subsidiaries | 0 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Equity Capital** | $**2551032** |
| **Total Liabilities and Equity Capital** | $**2788628** |

---

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

---

| |
|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **S-3**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **WINTRUST FINANCIAL CORP**  |

---

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| | | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Type**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Class Title**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Calculation or Carry Forward Rule**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Maximum Aggregate Offering Price**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Rate**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount of Registration Fee**  |
| **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** |
| Fees to be Paid | 1 | Debt | Debt Securities | 457(r) |  | 0.0001381 |  |
| Fees to be Paid | 2 | Equity | Common stock, no par value | 457(r) |  | 0.0001381 |  |
| Fees to be Paid | 3 | Equity | Preferred stock, no par value | 457(r) |  | 0.0001381 |  |
| Fees to be Paid | 4 | Other | Depositary Shares | 457(r) |  | 0.0001381 |  |
| Fees to be Paid | 5 | Other | Warrants | 457(r) |  | 0.0001381 |  |
| Fees to be Paid | 6 | Other | Stock Purchase Contracts | 457(r) |  | 0.0001381 |  |
| Fees to be Paid | 7 | Other | Stock Purchase Units | 457(r) |  | 0.0001381 |  |
| Fees Previously Paid |  |  |  |  |  |  |  |
| **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** |
| Carry Forward Securities |  |  |  |  |  |  |  |
|  |  |  | Total Offering Amounts: | Total Offering Amounts: | $0.00  |  | $0.00  |
|  |  |  | Total Fees Previously Paid:  | Total Fees Previously Paid:  |  |  | $0.00  |
|  |  |  | Total Fee Offsets:  | Total Fee Offsets:  |  |  | $0.00  |
|  |  |  | Net Fee Due:  | Net Fee Due:  |  |  | $0.00  |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Offering Note** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>1</sup> (a) An indeterminate aggregate initial offering price and number or amount of the securities of each identified class is being registered as may from time to time be sold at indeterminate prices. Separate consideration may or may not be received for securities that are issuable upon conversion of, or in exchange for, or upon exercise of, convertible or exchangeable securities. In reliance on and in accordance with Rules 456(b) and 457(r), Wintrust Financial Corporation (the "Registrant") is deferring payment of all of the registration fee. (b) The securities registered under this registration statement may be sold separately, together or as units with other securities registered under this registration statement and may include hybrid securities consisting of a combination of features of any of the securities listed in the table. (c) Debt securities, common stock, preferred stock and depositary shares may be issuable upon conversion or redemption of debt securities, preferred stock or depositary shares, as the case may be, or upon the exercise of warrants, in each case registered under this registration statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>2</sup> (a) An indeterminate aggregate initial offering price and number or amount of the securities of each identified class is being registered as may from time to time be sold at indeterminate prices. Separate consideration may or may not be received for securities that are issuable upon conversion of, or in exchange for, or upon exercise of, convertible or exchangeable securities. In reliance on and in accordance with Rules 456(b) and 457(r), Wintrust Financial Corporation (the "Registrant") is deferring payment of all of the registration fee. (b) The securities registered under this registration statement may be sold separately, together or as units with other securities registered under this registration statement and may include hybrid securities consisting of a combination of features of any of the securities listed in the table. (c) Debt securities, common stock, preferred stock and depositary shares may be issuable upon conversion or redemption of debt securities, preferred stock or depositary shares, as the case may be, or upon the exercise of warrants, in each case registered under this registration statement. (d) Common stock and preferred stock may be issued by the Registrant upon settlement of the stock purchase units of the Registrant and common stock may be issued by the Registrant upon settlement of the stock purchase contracts, in each case registered under this registration statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>3</sup> See Footnote 2.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>4</sup> (a) An indeterminate aggregate initial offering price and number or amount of the securities of each identified class is being registered as may from time to time be sold at indeterminate prices. Separate consideration may or may not be received for securities that are issuable upon conversion of, or in exchange for, or upon exercise of, convertible or exchangeable securities. In reliance on and in accordance with Rules 456(b) and 457(r), Wintrust Financial Corporation (the "Registrant") is deferring payment of all of the registration fee. (b) The securities registered under this registration statement may be sold separately, together or as units with other securities registered under this registration statement and may include hybrid securities consisting of a combination of features of any of the securities listed in the table. (c) Debt securities, common stock, preferred stock and depositary shares may be issuable upon conversion or redemption of debt securities, preferred stock or depositary shares, as the case may be, or upon the exercise of warrants, in each case registered under this registration statement. (d) Depositary shares will be evidenced by depositary receipts issued pursuant to a deposit agreement. In the event the Registrant elects to offer to the public fractional interests in shares of preferred stock registered under this registration statement, depositary receipts will be distributed to those persons purchasing such fractional interests and the shares of preferred stock will be issued to the depositary under the applicable deposit agreement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>5</sup> (a) An indeterminate aggregate initial offering price and number or amount of the securities of each identified class is being registered as may from time to time be sold at indeterminate prices. Separate consideration may or may not be received for securities that are issuable upon conversion of, or in exchange for, or upon exercise of, convertible or exchangeable securities. In reliance on and in accordance with Rules 456(b) and 457(r), Wintrust Financial Corporation (the "Registrant") is deferring payment of all of the registration fee. (b) The securities registered under this registration statement may be sold separately, together or as units with other securities registered under this registration statement and may include hybrid securities consisting of a combination of features of any of the securities listed in the table. (c) Warrants may represent rights to purchase debt securities, common stock or preferred stock of the Registrant, in each case registered under this registration statement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>6</sup> (a) An indeterminate aggregate initial offering price and number or amount of the securities of each identified class is being registered as may from time to time be sold at indeterminate prices. Separate consideration may or may not be received for securities that are issuable upon conversion of, or in exchange for, or upon exercise of, convertible or exchangeable securities. In reliance on and in accordance with Rules 456(b) and 457(r), Wintrust Financial Corporation (the "Registrant") is deferring payment of all of the registration fee. (b) The securities registered under this registration statement may be sold separately, together or as units with other securities registered under this registration statement and may include hybrid securities consisting of a combination of features of any of the securities listed in the table. (c) Stock purchase contracts may be issued separately or as stock purchase units.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>7</sup> (a) An indeterminate aggregate initial offering price and number or amount of the securities of each identified class is being registered as may from time to time be sold at indeterminate prices. Separate consideration may or may not be received for securities that are issuable upon conversion of, or in exchange for, or upon exercise of, convertible or exchangeable securities. In reliance on and in accordance with Rules 456(b) and 457(r), Wintrust Financial Corporation (the "Registrant") is deferring payment of all of the registration fee. (b) The securities registered under this registration statement may be sold separately, together or as units with other securities registered under this registration statement and may include hybrid securities consisting of a combination of features of any of the securities listed in the table. (c) Stock purchase units may consist of a stock purchase contract and securities of the Registrant, in each case registered under this registration statement, or securities of third parties, including U.S. treasury securities, securing the holders' obligations to purchase common stock under the stock purchase contracts.

---

| |
|:---|
| |
| **Rules 457(b) and 0-11(a)(2)** |
| Fee Offset Claims |
| Fee Offset Sources |
| **Rule 457(p)** |
| Fee Offset Claims |
| Fee Offset Sources |

---