SCORE™ ABOUT CUSTOMER CENTER SUPPLIER CENTER QUALITY INVESTORS CONTACT INVESTORS For over 20 years, we at SigmaTron International, continue our full commitment to achieve the best value for our stockholders. In fact, we believe that it is the superior quality and service we provide customers that drives our financial performance. Whether you’re looking for an investment or an EMS provider, we invite you to examine our track record. Committee Charters Audit Committee Compensation Committee Nominating Committee CONTACT INFORMATION Henry J. Underwood Corporate Counsel, Assistant Secretary Howard & Howard Attorneys PLLC 200 South Michigan Avenue Chicago, Il. 60604 James J. Reiman Chief Financial Officer, Vice President Finance, Treasurer and Secretary Investor Relations: 800-700-9095 © 2021 SigmaTron International, Inc. All rights reserved. ABOUT CUSTOMER CENTER SUPPLIER CENTER QUALITY INVESTORS CONTACT

SCORE™ ABOUT CUSTOMER CENTER SUPPLIER CENTER QUALITY INVESTORS CONTACT ABOUT For over 25 years, SigmaTron International, Inc. continues as an Electronic Manufacturing Services (EMS) provider of printed circuit board assemblies and completely assembled (box build) electronic products. The Company serves diverse end-user markets through a network of seven manufacturing facilities located in four countries: United States, Mexico, China, and Vietnam, with a companywide International Procurement Office (IPO) in Taiwan. The Company offers superior EMS value from engineering, design and component sourcing at internationally-competitive pricing, to manufacturing and test. © 2021 SigmaTron International, Inc. All rights reserved. ABOUT CUSTOMER CENTER SUPPLIER CENTER QUALITY INVESTORS CONTACT