SIEBERT FINANCIAL CORP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

(Mark One)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended: December 31,2025

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from______________to______________

Commission file number 0-5703

Siebert Financial Corp.

(Exact name of registrant as specified in its charter)

(310) 385-1861

Registrant’s telephone number, including area code

Securities registered pursuant to Section 12(b) of the Exchange Act:

Securities registered pursuant to Section 12(g) of the Exchange Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES ☐NO ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. YES ☐NO ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES ☒ NO☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). YES ☒ NO☐

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 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). YES ☐ NO☒

The aggregate market value of the common stock held by non-affiliates of the registrant (based upon the last sale price of the common stock reported on the Nasdaq Capital Market as of the last business day of the registrant’s most recently completed second fiscal quarter (June 30, 2025), was approximately $61,987,052.

The number of shares of the registrant’s outstanding common stock, as of March 24, 2026, were 41,940,936 issued and 40,940,936 shares outstanding.

Documents Incorporated by Reference: None

SIEBERT FINANCIAL CORP.

TABLE OF CONTENTS

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Forward-Looking Statements

For purposes of this Annual Report on Form 10-K (“Report”), the terms “Siebert,” “Company,” “we,” “us” and “our” refer to Siebert Financial Corp., and its wholly-owned and majority-owned subsidiaries collectively, unless the context otherwise requires.

The statements contained throughout this Report, that are not historical facts, including statements about our beliefs and expectations, are “forward-looking statements” within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements may appear throughout this Report, including without limitation, the following sections: Item 1 “Business,” Item 1A “Risk Factors,” and Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”Forward-looking statements include statements preceded by, followed by or that include the words “may,” “could,” “would,” “should,” “believe,” “expect,” “anticipate,” “plan,” “estimate,” “target,” “project,” “intend” and similar words or expressions. In addition, any statements that refer to expectations, projections, or other characterizations of future events or circumstances are forward-looking statements.

These forward-looking statements, which reflect our beliefs, objectives, and expectations as of the date hereof, are based on the best judgment of management. All forward-looking statements speak only as of the date on which they are made. Such forward-looking statements are subject to certain risks, uncertainties and assumptions relating to factors that could cause actual results to differ materially from those anticipated in such statements, including the following: economic, social and political conditions, global economic downturns resulting from extraordinary events; changes and volatility in tariffs and trade policies; securities industry risks; interest rate risks; liquidity risks; credit risk with clients and counterparties; risk of liability for errors in clearing functions; systemic risk; systems failures, delays and capacity constraints; network security risks; competition; reliance on external service providers; new laws and regulations affecting our business; net capital requirements; extensive regulation, regulatory uncertainties and legal matters; failure to maintain relationships with employees, customers, business partners or governmental entities; risks related to new business lines; the inability to achieve synergies or to implement integration plans and other consequences associated with risks and uncertainties detailed in Part I, Item 1A – “Risk Factors” of this Report as well as in our filings with the Securities and Exchange Commission (“SEC”).

We caution that the foregoing list of factors is not exclusive, and new factors may emerge, or changes to the foregoing factors may occur, that could impact our business. The forward-looking statements are based upon management’s beliefs and assumptions and are made as of the date of this Report. You should not place undue reliance on these forward-looking statements. We undertake no obligation to publicly update or revise these statements, whether as a result of new information, future events or otherwise, except to the extent required by the federal securities laws.

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