Other Events. On May 14, 2026, the Company announced that its Board of Directors approved the suspension of the Company's quarterly cash dividend. Attached as Exhibit 99.1 is a copy of the press release relating to the announcement, which is incorporated herein by reference.

Changes in Registrant's Certifying Accountant. (a) Dismissal of Independent Registered Public Accounting Firm On May 27, 2025, the Board of Directors (the “Board”) of the Company approved the dismissal of Crowe as the Company’s independent registered public accounting firm, effective immediately. The reports of Crowe on the Company’s consolidated financial statements for the two most recent fiscal years, ended December 31, 2024 and December 31, 2023, did not contain an adverse opinion or a di…

Changes in Registrant's Certifying Accountant. (a) Dismissal of Independent Registered Public Accounting Firm On May 27, 2025, the Board of Directors (the “Board”) of Chicago Rivet & Machine Co. (the “Company”) approved the dismissal of Crowe LLP (“Crowe”) as the Company’s independent registered public accounting firm, effective immediately. The reports of Crowe on the Company’s consolidated financial statements for the two most recent fiscal years, ended December 31, 2024 and December 31, 20…

Other Events. Chicago Rivet and Machine Co. (the “ Company ”), headquartered in Naperville, Illinois, previously disclosed in its quarterly report for the first quarter of 2024 that it was notified by one of its customers that certain fasteners manufactured by the Company’s wholly-owned subsidiary, H&L Tool Company, may not have conformed to customer specifications. These fasteners become part of an assembly that is used in the braking system of certain vehicles manufactured by our customer’s…

Director — Karen G. Ong: Appointment of Karen G. Ong to the Board of Directors.

Chief Financial Officer — Joel M. Brown: The company hired a new Chief Financial Officer from an external source.

President, Chief Operating Officer and Treasurer — Michael J. Bourg: Mr. Michael J. Bourg is retiring from his positions with a planned succession in place.

Director — Patricia M. Miller: Patricia M. Miller resigned from the Board of Directors.

Chairman and Chief Executive Officer — Walter W. Morrissey: The passing of the Chairman and Chief Executive Officer, Walter W. Morrissey.

Completion of Acquisition or Disposition of Assets. As previously disclosed in a Current Report on Form 8-K filed on August 17, 2022, Chicago Rivet & Machine Co. (the “Company”) entered into a Purchase and Sale Agreement (the “PSA”) with Frontenac Properties LLC (the “Purchaser”) pursuant to which the Company agreed, subject to the terms and conditions of the PSA, to sell its facility in Naperville, Illinois, in which the Company headquarters and warehouse space are located, to the Purchaser.…

Entry into a Material Definitive Agreement. On August 12, 2022, Chicago Rivet & Machine Co. (the “Company”) entered into a Purchase and Sale Agreement (the “PSA”) with Frontenac Properties LLC (the “Purchaser”) pursuant to which the Company has agreed, subject to the terms and conditions of the PSA, to sell its facility in Naperville, Illinois, in which the Company headquarters and warehouse space are located, to the Purchaser. The sale price for the property is $5,350,000 subject to certain…

Chairman of the Board and Chief Executive Officer — John A. Morrissey: John A. Morrissey is retiring and being succeeded by Walter W. Morrissey.

Chairman of the Board and Chief Executive Officer — John A. Morrissey: The CEO and Chairman of the Board is retiring.