Document

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

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

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Under Rule 14a-12

TEXAS CAPITAL BANCSHARES, INC.

(Name of Registrant as Specified In Its Charter)

Payment of Filing Fee (Check the appropriate box):

☒ No fee required.

☐ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1) Title of each class of securities to which transaction applies:

(2) Aggregate number of securities to which transaction applies:

(3) Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee is calculated and state how it was determined):

(4) Proposed maximum aggregate value of transaction:

☐ Fee paid previously with preliminary materials.

☐ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

(1) Amount Previously Paid:

(2) Form, Schedule or Registration Statement No:

2000 McKinney Avenue, 7th Floor

SUPPLEMENT TO PROXY STATEMENT FOR THE ANNUAL MEETING OF
STOCKHOLDERS TO BE HELD ON APRIL 21, 2026

To the Stockholders of Texas Capital Bancshares, Inc.:

This proxy statement supplement dated March 17, 2026 (this “Supplement”), supplements the Definitive Proxy Statement on Schedule 14A of Texas Capital Bancshares, Inc. (the “Company”), dated March 12, 2026 (the “Proxy Statement”), for the Company’s Annual Meeting of Stockholders to be held on April 21, 2026 (the “Annual Meeting”).

The Company is supplementing the Proxy Statement solely to clarify the effect of broker non-votes with respect to Proposal Two and Proposal Four described therein. Proposal Two is the proposal to ratify the selection of the Company’s auditors. Proposal Four is the proposal to approve the redomestication of the Company from Delaware to Texas by way of conversion. Generally, a broker non-vote occurs when shares held by a bank, broker or agent in “street name” for a beneficial owner are not voted with respect to a particular proposal because the person (i) has not received voting instructions from the beneficial owner and (ii) lacks discretionary voting power to vote those shares. Proposal Two is considered to be “routine” under NYSE rules and thus if the beneficial owner does not return voting instructions to the broker, the beneficial owner’s shares may be voted by the broker in its discretion on Proposal Two. Proposal Four is considered to be “non-routine”, such that the broker may not vote the shares on that proposal in the absence of the beneficial owner’s voting instructions.

The Proxy Statement is hereby amended and supplemented such that the following table replaces, in its entirety, the table on page 133.

Voting Item

Voting
Options

Board

Recommends

Voting Standard

Effect of

Withhold Votes or Abstentions

Routine1

Effect of

Broker

Non-Votes

1. Election of Directors

For,

Withhold

FOR each nominee

Plurality of votes cast2 3

None3

None

2. Ratification of appointment of Ernst & Young LLP for 2026

For,

Against,

Abstain

FOR

Majority of shares present and entitled to vote

Against

None

3. Advisory Vote to Approve the Compensation of the Named Executive Officers

For,

Against,

Abstain

FOR

Majority of shares present and entitled to vote

Against

None

4. Approval of the Redomestication of the Company from Delaware to Texas by way of Conversion

For,

Against,

Abstain

FOR

Majority of shares outstanding and entitled to vote

Against

5. Advisory Approval of Increasing the Threshold to Submit Stockholder Proposals

For,

Against,

Abstain

FOR

Majority of shares present and entitled to vote

Against

None

6. Adjournment of the Annual Meeting

For,

Against,

Abstain

FOR

Majority of shares present and entitled to vote

Against

None

1 The Company believes that Item 2 (Ratification of the Appointment of Auditors) and Item 6 (Adjournment of the Annual Meeting) are considered “routine” matters under New York Stock Exchange Rules. The Company believes that the remaining four matters are considered “non-routine”.

2 The ten nominees receiving the highest number of votes “for” will be elected.

3 However, a director who receives more “withhold” votes than “for” votes is required to submit a resignation under the Company’s Majority Vote Policy (see below).

THIS SUPPLEMENT SHOULD BE READ IN CONJUNCTION WITH THE PROXY STATEMENT.

EXCEPT AS SPECIFICALLY SUPPLEMENTED BY THE INFORMATION CONTAINED HEREIN, THIS SUPPLEMENT DOES NOT MODIFY ANY OTHER INFORMATION SET FORTH IN THE PROXY STATEMENT OR THE PROXY CARD AND THEY CONTINUE TO BE IN FULL FORCE AND EFFECT AS ORIGINALLY FILED.

From and after the date of this Supplement, any references to the “Proxy Statement” are to the Proxy Statement as amended and supplemented by this Supplement. To the extent that the information set forth herein differs from or updates information contained in the Proxy Statement, the information set forth herein shall supersede or supplement the information in the Proxy Statement.

Please note that any proxy card or notice of internet availability of proxy materials has not changed and may still be used to vote your shares in connection with the Annual Meeting. If you have already submitted your vote, you do not need to take any further action. Information on how to vote your shares and how to change your vote or revoke your proxy is contained in the Proxy Statement. The Company urges stockholders to vote their shares prior to the Annual Meeting by using one of the methods described in the Proxy Statement.