As filed with the Securities and Exchange Commission on May 21, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8
REGISTRATION STATEMENT
UNDER THE

SECURITIES ACT OF 1933

Piper SANDLER Companies

(Exact name of registrant as specified in its charter)

PIPER SANDLER COMPANIES AMENDED AND RESTATED
2003 ANNUAL AND LONG-TERM INCENTIVE PLAN

(as amended and restated May 17, 2023)

(Full title of the plan)

John W. Geelan

General Counsel and Secretary

Piper Sandler Companies

350 North 5th Street, Suite 1000

Minneapolis, Minnesota 55401

(Name and address of agent for service)

(612) 303-6000

(Telephone number, including area code, of agent for service)

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.

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. ¨

EXPLANATORY NOTE

This Registration Statement on Form S-8 (this “Registration Statement”) is being filed for the purpose of registering an additional 3,087,152 shares of common stock, par value $0.01 per share (the “Common Stock”), of Piper Sandler Companies, a Delaware corporation (the “Registrant”), to be issued pursuant to the Piper Sandler Companies Amended and Restated 2003 Annual and Long-Term Incentive Plan (as amended and restated May 17, 2023) (the “Plan”). In accordance with Section E of the General Instructions to Form S-8, the contents of the following Registration Statements on Form S-8 relating to the Plan previously filed with the Securities and Exchange Commission (the “Commission”) are incorporated herein by reference File No. 333-111665, File No. 333-122494, File No. 333-142699, File No. 333-150962, File No. 333-159360, File No. 333-205229, File No. 333-228096, File No. 333-238598, File No. 333-268089, and File No. 333-272072.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

The following are filed as exhibits to this Registration Statement:

EXHIBIT INDEX

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Minneapolis, State of Minnesota, on May 21, 2026.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed by the following persons in the capacities and on the date indicated.