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 24, 2025

PUREBASE CORPORATION

(Exact name of registrant as specified in its charter)

14110 Ridge Road

Sutter Creek, California 95685

(Address of principal executive offices)

(209) 274-9143

(Registrant’s telephone number, including area code)

N/A

(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:

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 1.01 Entry into a Material Definitive Agreement.

On September 24, 2025, Purebase Corporation, a Nevada corporation (the “Company”), entered into a securities purchase agreement with Vanquish Funding Group Inc., a Virgina corporation (“Vanquish”), pursuant to which the Company issued to Vanquish a promissory note (the “Note”) in the principal amount of $123,050 (including $16,050 of original issue discount) and received funds of $100,000 after legal fees of $2,500 and a due diligence fee of $4,500. Upon an event of default the Note is convertible into shares of common stock of the Company (“Conversion Shares”), subject to a 4.99% beneficial ownership limitation, at a 35% discount to the share price of the common stock. The Note bears interest at 12% which interest rate increases to 22% if not timely paid. The Note matures on July 30, 2026. Under the Note, $68,908 is payable on March 30, 2026 and $17,227 is payable on each of March 30, 2026, April 30, 2026, May 30, 2026, June 30, 2026 and July 30, 2026.

The foregoing description of the Securities Purchase Agreement and Note is qualified in its entirety by reference to the full text of such documents, copies of which are attached to this report as Exhibits 10.1, and 10.2, respectively, and are incorporated herein by reference.

Item 3.02 Unregistered Sales of Equity Securities.

When issued in accordance with the Note, the Conversion Shares will be exempt from registration under Section 4(a)(2) as promulgated by the SEC under of the Securities Act, as transactions by an issuer not involving a public offering.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

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.