Investor Relations

MZ North America
Chris Tyson
Managing Director
T: 949-491-8235
SASI@mzgroup.us

Sigma Labs Internal IR
Steven Gersten
investors@sigmaadditive.com

Transfer Agent

Issuer Direct

Auditor

Haynie & Company
50 West Broadway
Suite 600
Salt Lake City, UT 84101
T: 801-532-7800

Legal Counsel

TroyGould PC
1801 Century Park East
Suite 1600
Los Angeles, CA, 90067