0001437749-25-013946 Sample Contracts

SENIOR CONVERTIBLE DEBENTURE DUE THE EARLIER OF THE TRIGGER DATE AND JANUARY 17, 2026
Convertible Security Agreement • May 1st, 2025 • Blackboxstocks Inc. • Metal mining • Delaware

THIS SENIOR CONVERTIBLE DEBENTURE of Blackboxstocks Inc., a Nevada corporation (the “Company”), having its principal place of business at 5430 LBJ Freeway, Suite 1485, Dallas, Texas, is designated as its Senior Convertible Debenture due the earlier of the Trigger Date and January 17, 2026 (this debenture, the “Debenture” and, collectively with the other debentures (the “Additional Debentures”) issued pursuant to the terms of the Purchase Agreement (as defined below), the “Debentures”) and is issued pursuant to the Placement Agent Agreement (as defined below).