SCORE™ ABOUT CUSTOMER CENTER SUPPLIER CENTER QUALITY INVESTORS CONTACT Stock Information SigmaTron International’s common stock has been trading on the Nasdaq exchange under the symbol SGMA since the Company’s initial public offering in February 1994. The Company has more than 3.9 million shares of common stock outstanding. The Company has not paid cash dividends on its common stock since completing its February 1994 initial public offering and does not intend to pay any dividends in the foreseeable future. Stock Transfer Agent and Registrar American Stock Transfer & Trust Company, LLC 6201 15th Avenue Brooklyn, NY 11219 Corporate Offices SigmaTron International, Inc. 2201 Landmeier Road Elk Grove Village, IL 60007 Tel 847-956-8000 Fax 847-956-8001 Investor Relations 800-700-9095 Corporate Information SEC Counsel Greenberg Traurig, LLP 77 West Wacker Drive Chicago, IL 60601 Corporate Counsel Howard & Howard Attorneys PLLC 200 South Michigan Avenue Chicago, IL 60604 Independent Public Accountants BDO USA, LLP 233 North Michigan Avenue Chicago, IL 60601 INVESTORS QUICK LINKS LEADERSHIP » COMMITTEE CHARTERS - AUDIT COMMITTEE » - COMPENSATION COMMITTEE » - NOMINATING COMMITTEE » SEC REULATORY FILINGS - ANNUAL REPORTS » - SEC XRBL FILINGS » - STOCK INFORMATION » 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 Annual Reports We make our annual reports and other financial documents available to investors at all times. To obtain a copy of an investor publication, please select from the following. 2022 10-Q Form 10-Q Q1 073121 Other Notifications FY 2022 – Notice and Proxy Statement for Special Meeting FY 2022 – Proxy Card for Special Meeting 2021 Full Annual Report Download PDF View as Flipbook 10-K Download PDF 10-Q Form 10-Q Q3 013121 Form 10-Q Q2 103120 Form 10-Q Q1 073120 Other Notifications FY 2021 – Proxy Solicitation FY 2021 – Notice of Annual Meeting 2020 Full Annual Report Download PDF View as Flipbook 10-K Download PDF 10-Q Form 10-Q Q3 013120 Form 10-Q Q2 103119 Form 10-Q Q1 073119 Other Notifications FY 2020 – Proxy Solicitation FY 2020 – Notice of Annual Meeting 2019 2018 2017 2016 2015 2014 INVESTORS QUICK LINKS LEADERSHIP » COMMITTEE CHARTERS - AUDIT COMMITTEE » - COMPENSATION COMMITTEE » - NOMINATING COMMITTEE » SEC REULATORY FILINGS - ANNUAL REPORTS » - SEC XRBL FILINGS » - STOCK INFORMATION » 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