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): September 15, 2026

DEFI DEVELOPMENT CORP.

(Exact name of registrant as specified in its charter)

(561) 559-4111

(Registrant’s telephone number, including area code)

Not Applicable

(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):

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

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.

Cash Dividend Declaration

On September 15, 2026, as contemplated by the prospectus supplement for the initial public offering of the Variable Rate Series C Perpetual Preferred Stock, par value $0.00001 per share (“CHAD Stock”), DeFi Development Corp. (the “Company”) announced that its board of directors declared cash dividends of $0.07944 per share of CHAD Stock for the period between the issuance of CHAD on September 8, 2026 to October 1, 2026 and also declared daily cash dividends of $0.00516 per share of CHAD Stock for each business day for the period from October 1, 2026 through October 30, 2026, as listed in the table below (21 business days in the aggregate), which represents a per annum dividend rate of 13.00% on the CHAD Stock. Daily payments will be made to stockholders of record of CHAD Stock at the close of business on the immediately preceding business day.

United States Federal Income Tax Considerations

From a U.S. federal income tax perspective, to the extent distributions on the CHAD Stock are not treated as being made out of the Company's accumulated or current earnings and profits, they will, in the case of a U.S. holder, be treated first as a tax-free return of capital (“ROC”) to the extent of a U.S. Holder’s adjusted tax basis in the CHAD Stock, and thereafter as capital gain which will be long-term capital gain if such U.S. Holder’s holding period for the stock exceeds one year at the time of the distribution and, in the case of a non-U.S. holder, generally will not be subject to U.S. federal income or withholding tax with respect to gain, if any, recognized in connection with the non-U.S. holder’s receipt of such distribution. Non-U.S. holders should review the disclosure under “—Material United States Federal Income Tax Considerations” in the prospectus supplement dated August 31, 2026. While there is no assurance that the Company will (or will not) have sufficient current or accumulated E&P to cause that any of our distributions are treated as dividends, a ROC or otherwise, the Company does not have any accumulated earnings and profits and does not expect to generate current earnings and profits in the current year or the foreseeable future.

For purposes of this discussion, a “U.S. holder” means a beneficial owner of the CHAD Stock that for U.S. federal income tax purposes is:

For the purposes of this discussion, a ”non-U.S. holder” means a beneficial owner of the CHAD Stock that is not a U.S. holder nor a partnership (including any entity or arrangement that is treated as a partnership for U.S. federal income tax purposes).

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.