PIPER SANDLER COMPANIES

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549​

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. )

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Filed by a Party other than the Registrant ☐

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Preliminary Proxy Statement

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

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Definitive Proxy Statement

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Definitive Additional Materials

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Soliciting Material under §240.14a-12

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Piper Sandler Companies

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(Name of Registrant as Specified In Its Charter)

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(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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No fee required.

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Fee paid previously with preliminary materials.

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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Letter from our Chairman and CEO

April 9, 2026​

Fellow Shareholders:

You are invited to join us for our 2026 annual meeting of shareholders which will take place on Wednesday, May 20, 2026 at 1:00 p.m. Central Time. The meeting will be held virtually via webcast. The Notice of Annual Meeting of Shareholders and the proxy statement that follow describe the business to be conducted at the meeting.

2025 marked another year of strong performance for our company. We achieved adjusted net revenues of $1.88 billion, adjusted net income of $318 million, and adjusted earnings per share of $4.43, each a non-GAAP financial measure. These results reflect strong growth from 2024 and included record or near-record revenues from several of our businesses, including our advisory services, equities institutional brokerage, public finance, and fixed income businesses, with standout years from many groups within those businesses. Our performance reflects our continued focus on finding new opportunities to serve and increase our value to our clients and execute on our long-term growth strategy. In addition, we returned $239 million of capital to shareholders through share repurchases and dividends for the year, and on March 23, 2026, we completed a four-for-one forward stock split of our shares of common stock. We continue to be excited by the opportunities that we see ahead of us for delivering value to you, our shareholders.

We are furnishing our proxy materials to you over the Internet, which will reduce our costs and the environmental impact of our annual meeting. Accordingly, we mailed a Notice of Internet Availability of Proxy Materials to you, which contains instructions on how to access our proxy statement and annual report and vote online. The Notice of Internet Availability of Proxy Materials also contains instructions on how to request a printed set of proxy materials.

Whether or not you plan to attend the meeting, your vote is important and we encourage you to vote your shares promptly. You may vote your shares using a toll-free telephone number or the Internet. If you received a paper copy of the proxy card by mail, you may sign, date and mail the proxy card in the envelope provided.

We are thankful that you have chosen to be our shareholders, and we look forward to continuing to serve our clients and provide long-term returns to our shareholders.

Sincerely,

Chad R. Abraham

Chairman and Chief Executive Officer

Notice of Annual Meeting

of Shareholders

May 20, 2026, at 1:00 p.m., Central Time

Virtually at www.virtualshareholdermeeting.com/PIPR2026

To the Shareholders of Piper Sandler Companies:

The 2026 annual meeting of shareholders of Piper Sandler Companies will be held virtually on Wednesday, May 20, 2026 at 1:00 p.m., Central Time, for the following purposes:

The election of ten directors, each for a one-year term.

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Ratification of the selection of Ernst & Young LLP as the independent auditor of Piper Sandler Companies for the fiscal year ending December 31, 2026.

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An advisory (non-binding) vote to approve the compensation of the officers disclosed in the attached proxy statement, or say-on-pay vote.

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Any other business that may properly be considered at the meeting or any adjournment or postponement of the meeting.

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We believe that a virtual annual meeting of shareholders provides greater access to those who may want to attend and, therefore, have chosen this over an in-person meeting for 2026. In order to vote on the matters brought before the meeting, you may submit your proxy vote by telephone or internet, as described in the Notice of Internet Availability of Proxy Materials and the following proxy statement, by no later than 11:59 p.m., Eastern Time on Tuesday, May 19, 2026 for any shares you hold directly, and by no later than 11:59 p.m., Eastern Time on Friday, May 15, 2026 for any shares you hold in a retirement plan. If you received a paper copy of the proxy card by mail, you may sign, date and mail the proxy card in the envelope provided. The envelope is addressed to our vote tabulator, Broadridge Financial Solutions, Inc., and no postage is required if mailed in the United States. Holders of record of shares of our common stock at the close of business on March 24, 2026 are entitled to notice of, and to vote at, the meeting.

Important Notice Regarding the Availability of Proxy Materials

for the Annual Meeting of Shareholders to be held on May 20, 2026

Our proxy statement and 2025 annual report are available at

www.pipersandler.com/proxymaterials.

By Order of the Board of Directors

John W. Geelan

Secretary

April 9, 2026