Exhibit 10.2 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this "Agreement") is dated as of August 11, 2025, between ALT5 Sigma Corporation, a Nevada corporation (the "Company"), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a "Purchaser" and collectively, the "Purchasers"). WHEREAS, subject to the terms and conditions set forth in this Agreement and pursuant to Section 4(a)(2) of the Securities Act of 1933, as amended (the "Secu ...