Tantech Holdings Ltd. announced that on October 14, 2025, it entered into a note purchase agreement with Streeterville Capital, LLC. Under this agreement, Tantech issued and sold a promissory note with an original principal amount of $3,230,000 for gross proceeds of $3,000,000. The company intends to use the net proceeds for working capital and general business purposes. The note includes provisions for increased balances in the event of certain trigger events, with a maximum aggregate increase of up to 25%. If an event of default occurs, the outstanding balance becomes immediately due and payable, and interest may accrue at a rate equal to the lesser of 15% per annum or the maximum rate permitted under applicable law. The maturity date and a direct URL for the full prospectus are not included in the document.