Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2021 Siebert Financial Corp . (Exact name of registrant as specified in its charter) New York 0-5703 11-1796714 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification Number) 535 Fifth Avenue , 4 th Floor , New York , NY 10017 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code:   (212) 644-2400   120 Wall Street, New York, NY 10005 (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock - $0.01 par value SIEB The Nasdaq Capital Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). 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 13(a) of the Exchange Act. ☐ Item 8.01 Other Events. On August 4, 2021, Siebert Financial Corp. (the “Company”) moved its headquarters to 535 Fifth Avenue, 4 th Floor, New York, NY 10017. The Company’s telephone number remains the same: (212) 644-2400. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Dated: August 4, 2021   By: /s/ Andrew H. Reich Andrew H. Reich Executive Vice President, Chief Operating Officer, Chief Financial Officer and Secretary