Prospectus filed pursuant to Rule 424(b)(3)
(WorldNews Germany)

Filed pursuant to Rule 424(b)(3) Registration Statement No. 333-239774 SIGMA LABS, INC. Prospectus 515,465 Shares of Common Stock Offered by Selling Stockholders This prospectus relates to the offer and sale from time to time of up to 515,465 shares of our common stock issuable upon the exercise of currently outstanding common stock purchase warrants (the `Placement Warrants`). The Placement Warrants were acquired by investors in an April 2020 private placement described herein. The investors are referred to in this prospectus as the `selling stockholders.` For a list of the selling stockholders, please see `Selling Stockholders.` The selling stockholders may sell these shares from time to...