Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this "Agreement") is dated as of November 11, 2025, between Allurion Technologies, Inc., a Delaware 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) thereof and/or Regulation D thereunder, the ...