 New Global Customer Wins Drive Improved Financial Performance for Revenue Gross Margins Management to Host Conference Call Today at 4:30 p.m. ET SANTA FE, NM ACCESSWIRE April 22, 2021 Sigma Labs, Inc. NASDAQ:SGLB Sigma Labs or the Company, a leading developer of quality assurance software for the commercial 3D metal printing industry, has reported its financial and operational results for the first quarter ended March 31, 2021. 